Entries |
Document | Title | Date |
20080205086 | INVERTER SYSTEM - A vehicle system for use in powering an AC load. The system may included an inverter system operating in cooperation with a power distribution system. The power distribution system may be configured to provide a stabilized power output to the inverter system. The inverter system be configured to inverter the stabilized power output to an output suitable for powering the AC load. | 08-28-2008 |
20080205087 | Power supply feedback control using sensed duty cycle - A feedback control circuit | 08-28-2008 |
20080273353 | Device for Supplying Electrical Power to a Fuel Pump of a Motor Vehicle Internal Combustion Engine | 11-06-2008 |
20090091950 | POWER CONVERTING CIRCUIT WITH OPEN LOAD PROTECTION FUNCTION - A power converting circuit with an open load protection function is electrically connected to a power supply providing a first voltage level, and outputs a second voltage level to drive a load. The power converting circuit includes a DC/DC converter and a rectifying element disposed between an output node and an input node of the DC/DC converter that forms a discharging loop with the DC/DC converter. The DC/DC converter receives the power, converts the first voltage level into the second voltage level and outputs the second voltage level to the load. The rectifying element is utilized to release a surge voltage produced by the DC/DC converter in an open load condition. | 04-09-2009 |
20090103332 | CHARGING PROBE CIRCUIT - Various example embodiments are disclosed. According to one example embodiment, a charging probe may include an alternating current (AC) input configured to receive current from an AC source, a rectifier circuit configured to rectify the current received from the AC source, a primary coil, and a control circuit configured to convert the rectified current into a regulated voltage across a primary coil. The primary coil may be configured to induce a magnetic field from the regulated voltage. | 04-23-2009 |
20090147541 | Complex Inductor and Power Supply Unit - A complex inductor according to the present invention changes its magnetic coupling polarity according to currents flowing its two inductors. The complex inductor includes a first magnetic member, around which first and third windings are formed, and a second magnetic member, around which second and fourth windings are formed. A first inductor is formed by connecting the first winding to the second winding, and a second inductor is formed by connecting the third winding to the fourth winding. The two magnetic members are made of a magnetic material having a magnetic permeability that gradually decreases as its magnetic flux density is increased. When the two windings are interconnected in a direction in which induced voltages generated in these windings by the current flowing in the second inductor weaken each other, the magnetic coupling polarity between the first and second inductors changes according to the current flowing in the inductors. The two inductors are magnetically coupled so that, when one of the two inductors stores energy, the current flowing in the other inductor increases, and when one of the two inductors releases energy, the current flowing in the other inductor decreases. | 06-11-2009 |
20090190374 | Method for Coupling a Direct Current Power Source Across a Nearly Frictionless High-Speed Rotation Boundary - A system and method is provided for coupling a power source across a rotation boundary. A generator converts a DC source on the stationary side of a rotation boundary to a square-wave at a determined frequency. The generator output connects through a transmission line and a first transformer to a set of stator rings. A set of rotor rings form a set of coupling capacitors with the stator rings. The rotor rings connect through a second transformer and a transmission line to a non-linear circuit capable of converting the square-wave to a DC voltage and current that can power a load on the rotating side of the rotating boundary in which the power is nearly equal to the power available from the source on the stationary side of the rotation boundary. | 07-30-2009 |
20090231883 | DC-DC CONVERTER - A DC-DC converter includes: a first series circuit in which a resonance reactor, a primary winding of a transformer, and a switching element are connected in series, the first series circuit being connected to both ends of a direct current power supply; a second series circuit in which a first rectifier, a current resonance capacitor, and a secondary winding of the transformer are connected in series, the second series circuit being connected to both ends of the direct current power supply; a rectifying/smoothing circuit having a second rectifier and a smoothing capacitor and connected to both ends of a series circuit of the current resonance capacitor and the secondary winding of the transformer; an output voltage detection circuit that detects an output voltage of the rectifying/smoothing circuit; and a control circuit that turns on and off the switching element based on an output voltage signal from the output voltage detection circuit. | 09-17-2009 |
20090251924 | Power supplying unit - A power supplying apparatus includes a conversion device to convert direct current (DC) power from a battery set into alternating current (AC) power. A current transformer arrangement may generate a DC charging signal based on the AC power and provide the DC charging signal to the battery set. The current transformer may include a plurality of current transformers. | 10-08-2009 |
20090268486 | Self-oscillating modulator - A self-oscillating modulator operates at a two-level output. The modulator comprises an alternating output stage ( | 10-29-2009 |
20090273950 | Power-saving device for power supply - A power-saving device for power supply, including a transformer having a primary coil and a secondary coil. The primary coil is electrically connected with a power supply circuit of the power supply. The secondary coil is serially connected with a diode to electrically connect with a load via a load circuit. The power supply circuit controls powering on/off of the primary coil by means of a switch element. The load circuit includes a π-type filter circuit, which is chargeable and dischargeable. A power indicator circuit is forward parallel connected between the secondary coil of the transformer and the load circuit. The power indicator circuit includes a light-emitting diode. One terminal of the light-emitting diode is connected with P-pole of the diode. The diode acts as a barrier to the discharge of the π-type filter circuit so as to effectively reduce energy consumption of the power indicator circuit. | 11-05-2009 |
20090303751 | POWER SOURCE APPARATUS AND CONTROL METHOD THEREOF - A power source apparatus includes a DC voltage generator ( | 12-10-2009 |
20100073964 | SWITCHING CONTROL CIRCUIT AND SWITCHING POWER SUPPLY - A switching element controls supply of a primary current to a transformer in a switching power supply. An amplifier circuit amplifies an output ripple of an auxiliary winding of a transformer. A fluctuation generator circuit generates a fluctuating signal, based on an output of the amplifier circuit. A basic signal generator circuit generates a PWM basic signal whose frequency fluctuates according to the fluctuating signal. A control circuit ON controls the switching element when receiving the PWM basic signal, and OFF controls the switching element when receiving an OFF signal based on output feedback of the switching power supply. | 03-25-2010 |
20100085775 | HIGH VOLTAGE STEP-UP DRY POWER TRANSFORMER AND POWER SUPPLY UNIT COMPRISING AT LEAST ONE SUCH TRANSFORMER - A high voltage step-up power transformer includes at least one module which defines a lower voltage primary side and a higher voltage secondary side and which includes at least one primary winding and at least one secondary winding, wound concentrically around a ferromagnetic core body, the primary winding(s) being situated outwardly, and at least one shielding and/or insulating surface structure being arranged between the primary and secondary windings. The transformer ( | 04-08-2010 |
20100085776 | SWITCHING POWER SUPPLY APPARATUS - A switching power supply apparatus according to the present invention includes a switching device and a control circuit, and the control circuit includes: a control terminal through which an auxiliary power voltage is supplied; an error amplifier which generates a difference voltage depending on a difference between a control terminal voltage and a first reference voltage; a device current detection circuit which generates a device current detection signal indicating an amount of a current flowing in the switching device; a drive circuit which generates a drive pulse signal having a duty cycle based on a difference between the difference voltage and the device current detection signal and drives the switching device by using the generated drive pulse signal; and a dummy load circuit through which a dummy load current flows from the control terminal when the difference voltage becomes equal to or higher than a second reference voltage. | 04-08-2010 |
20100085777 | CHARGING PROBE CIRCUIT - Various example embodiments are disclosed. According to one example embodiment, a charging probe may include an alternating current (AC) input configured to receive current from an AC source, a rectifier circuit configured to rectify the current received from the AC source, a primary coil, and a control circuit configured to convert the rectified current into a regulated voltage across a primary coil. The primary coil may be configured to induce a magnetic field from the regulated voltage. | 04-08-2010 |
20100091521 | DUAL ISOLATED INPUT SINGLE POWER SUPPLY TOPOLOGY - An electric power supply system includes a transformer having two primary windings for receiving input power and a secondary winding for delivering output power, in which the primary windings are galvanically isolated from each other. A method for supplying electrical power to a load includes magnetically coupling a first primary voltage to a secondary power output; and magnetically coupling a second primary voltage to the secondary power output so that the second primary voltage is kept galvanically isolated from the first primary voltage. | 04-15-2010 |
20100110730 | POWER DEVICE - A power device transforms input power into power for output, and includes an input unit, a power factor unit, an output unit, a power saving unit, and a control signal port. The power saving unit includes a first electronic switch, a first diode and a single-direction switch. The first electronic switch is connected between the input unit and the power factor unit. An anode of the first diode is connected to the input unit, and a cathode of the first diode is connected to the output unit. The single-direction switch is connected to the power factor unit and the output unit to block current from the output unit to the power factor unit. The control signal port controls an on/off state of the first electronic switch. | 05-06-2010 |
20100110731 | Uninterruptible Power Supply - An uninterruptible power supply is able to switch an operation mode between an on-line operation method and an off-line operation method for a wider range of commercial power supplies. An uninterruptible power supply | 05-06-2010 |
20100135044 | SINGLE-STAGE SWITCHING POWER SUPPLY - A single-stage switching power supply includes a transformer, a voltage level generation circuit, a first switching circuit, a second switching circuit, a rectifying and filtering circuit, a feedback circuit and a control circuit. The rectifying and filtering circuit is connected to the secondary winding assembly and the system circuit for generating an output voltage. The feedback circuit generates a feedback signal in response to the output voltage. In response to the feedback signal and an operating-status signal issued by the system circuit, the first and second switching circuits are alternately enabled under control of the control circuit such that electric energy of a first DC voltage is transmitted from the first primary winding assembly to the secondary winding assembly. The first switching circuit is disabled but the second switching circuit is enabled under control of the control circuit when the operating-status signal is at a standby operating status. | 06-03-2010 |
20100157627 | OUTPUT VOLTAGE DETECTING CIRCUIT AND SWITCHING POWER SUPPLY HAVING SUCH OUTPUT VOLTAGE DETECTING CIRCUIT - An output voltage detecting circuit includes a conducting structure, a voltage regulator, a first resistor and a second resistor. The conducting structure includes a power output return terminal, a first contact and a second contact. A compensating voltage is generated between the first and second contacts when an output current flows through the first and second contacts. The voltage regulator adjusts a first current according to a voltage across a first circuit terminal and the ground terminal of the voltage regulator, thereby generating a detecting signal according to the first current. An output voltage across the positive power output terminal and the power output return terminal is subject to voltage division by the first and second resistors to generate a divided voltage. The voltage across the first circuit terminal and the ground terminal of the voltage regulator is equal to a difference between the divided voltage and the compensating voltage. | 06-24-2010 |
20100165664 | Gate driving circuit - A primary circuit turns on switching elements and generates energy from a direct-current power supply to a secondary circuit through a transformer. The secondary circuit charges a driven element using the energy obtained from the primary circuit through the transformer, turns on a switching element, discharges the energy accumulated in the driven element, and generates the energy in the primary circuit through the transformer. The primary circuit returns the energy obtained from the secondary circuit to the direct-current power supply. | 07-01-2010 |
20100188869 | POWER SYSTEM HAVING AC AND DC POWER SOURCES - A power system ( | 07-29-2010 |
20100202158 | Electric power conversion circuit having transfer gain variable by pulse-width modulation - The present invention discloses a single stage DC to DC electric power conversation circuit which has a transfer gain variable by pulse-width modulation over a continuum from zero to beyond unity. Conversion efficiency of the circuit is optimal when the transfer gain is set to its middle range, where a large part of power is transferred from input directly to output without undergone electro-magnetic conversion. Conversion efficiency is therefore very high and such a high efficiency occurs under normal operating condition. | 08-12-2010 |
20100202159 | POWER CONVERTER SYSTEM WITH PULSED POWER TRANSFER - Electronic devices such as portable electronic devices are provided. Power converters are provided that convert alternating-current power into direct-current power for powering the electronic devices. A power converter may rectify an alternating current line signal to produce a rectified alternating current signal having peaks and valleys. The power converter may have a capacitor and transformer coupled across the rectifier circuit. Power regulation switching circuitry in the power converter or the electronic device may regulate how much power is delivered to the electronic device. Relatively more power may be delivered during the peaks in the rectified signal than during the valleys. Pulsed power delivery may be controlled using control resources in the power converter, in the electronic device, or in both the power converter and electronic device. | 08-12-2010 |
20100226148 | WIDE SUPPLY RANGE FLYBACK CONVERTER - A wide supply range flyback converter consists of a Schmitt trigger driving a switching device such as MOSFET. The circuit employs a feed forward voltage controlled current source and two other voltage controlled current sources, one of which is responsible for minimizing on time and the other for increasing off time in order to achieve high efficiency, low standby power, and improved overload conditions. | 09-09-2010 |
20100254162 | Modular power adapter - A modular power adapter and method for using the same which increases the ease of a user's travel with portable electronic devices. The modular power adapter includes an output module which may be interchangeably and detachably coupled to DC input module or an AC input module. The output module and the input module are provided in separate housing structures thereby effectively spreading the heat dissipated from the modular power adapter. | 10-07-2010 |
20100296315 | PIEZOELECTRIC POWER CONVERTER - Disclosed is a piezoelectric power supply converter, wherein, a piezoelectric element is utilized to replace a conventional capacitor, due to characteristic of mechanical resonance of said piezoelectric element, said piezoelectric element may contain higher capacitance than said conventional capacitor, and a parasitic resistance of said piezoelectric element is smaller that that of an ordinary capacitor. Through a resonance between an externally added inductive element and a piezoelectric-capacitor and said resonance of said piezoelectric element itself, said piezoelectric element is capable of transmitting electrical energy efficiently, thus achieving large output power. Therefore, said piezoelectric-capacitor is capable of improving shortcomings of said conventional capacitors of low voltage endurance, large leakage current, and small output power. | 11-25-2010 |
20100302808 | Power source apparatus - A power source apparatus includes: a first alternating current line; a second alternating current line; an electric power inputting portion including a rectifying circuit for rectifying an alternating current voltage supplied from an alternating current power source, the electric power inputting portion serving to output the rectified voltage to each of the first and second alternating current lines; a first converter including a switching element for converting the alternating current voltage into a first direct current voltage; a second converter for converting the first direct current voltage obtained in the first converter into a second direct current voltage; and a control circuit for carrying out control for driving at least the switching element of the first converter so as to be turned ON or OFF. | 12-02-2010 |
20100302809 | Piezoelectric transformer driving device and image forming device - A piezoelectric transformer driving device includes a piezoelectric transformer for outputting an alternating high voltage, a switching control part configured to control the control frequency of the control signal, a reference voltage waveform generation part configured to switch between a first voltage value, a second voltage value and a third voltage value, a monitor voltage generation part configured to generate a monitor voltage waveform based on the high voltage output from the piezoelectric transformer, and a comparison part configured to compare the reference voltage waveform with the monitor voltage waveform to generate a comparison result, and configured to supply the comparison result to the switching control part. | 12-02-2010 |
20100321955 | APPARATUS FOR TRANSFER OF ELECTRICAL ENERGY - An apparatus for transfer of electrical energy between a primary side and a secondary side. The apparatus includes: at least one voltage input on the primary side; at least one transformer, wherein the transformer has on the primary side at least a first winding area and a second winding area; and at least one voltage monitoring unit, wherein the voltage monitoring unit is embodied in such a manner, that it connects the voltage input with the first winding area or the second winding area as a function of a primary voltage present at the voltage input. | 12-23-2010 |
20110038179 | Power Converter Including a Charge Pump Employable in a Power Adapter - A power converter including a charge pump employable in a power adapter. In one embodiment, the charge pump includes a voltage divider with a first diode having a terminal coupled to a terminal of a first capacitor and a second diode having a terminal coupled to a terminal of a second capacitor and another terminal coupled to another terminal of the first capacitor. The charge pump also includes a third diode coupled across the second diode and the second capacitor, and a charge pump power switch coupled across the first capacitor and the second diode. | 02-17-2011 |
20110051461 | POWER SUPPLY WITH A PIEZOELECTRIC TRANSFORMER AND METHOD FOR POWER CONVERSION - A power supply with a piezoelectric transformer is provided. A method for power conversion is also provided. The power supply includes a piezoelectric transformer and an oscillator circuit connected to the piezoelectric transformer. The oscillator circuit controls a sinusoidal voltage waveform at an input of the piezoelectric transformer to drive the piezoelectric transformer. | 03-03-2011 |
20110075445 | Wide range DC power supply with bypassed multiplier circuits - A power supply provides dc power over a wide range of output voltages at full operating power by utilizing multiplying circuits ( | 03-31-2011 |
20110075446 | Circuit for Converting a Pulsed Input Voltage to a DC Voltage - The present disclosure presents a circuit for converting a pulsed input voltage to a DC output voltage. The circuit comprises input nodes for receiving the pulsed input voltage and output nodes for outputting the DC output voltage. The circuit further comprises a first transistor and a second transistor connected between the input and the output nodes in a synchronous rectifier configuration. The first and second transistors each have a gate connected to a driving circuit configured for alternately charging the gates of the transistors whereby the driving circuit comprises an auxiliary circuit not directly connected to the input nodes and configured for providing a predetermined auxiliary supply voltage to the gates. In an embodiment, the auxiliary circuit comprises a buck DC-DC converter of which an input node is connected to the output nodes and of which an output node is connected to the gates. | 03-31-2011 |
20110090714 | OUTPUT APPARATUS TO OUTPUT A VITAL OUTPUT FROM TWO SOURCES - An output apparatus includes a first source of a first signal having a first state or a different second state; a second source of a second signal having a first state or a different second state; and a circuit structured to output a vital output including a first state when the first state of the first signal corresponds to the first state of the second signal and, otherwise, including a different second state. At least one of the first signal and the second signal is a static signal. The other one of the first signal having the first state and the second signal having the first state is a dynamic signal. When at least one of the first signal has the different second state of the first signal and the second signal has the different second state of the second signal, the vital output includes the different second state. | 04-21-2011 |
20110122655 | POWER SUPPLY WITH AC/DC CONVERTER AND DC/AC INVERTER IN LOOP - A power supply includes a DC/AC inverter and an AC/DC converter connected in a loop such that a DC output of the AC/DC converter is connected to a DC input of the DC/AC inverter and an AC output of the DC/AC inverter is connected to an AC input of the AC/DC converter. Another AC output of the DC/AC inverter is available to provide power to a load. | 05-26-2011 |
20110222313 | POWER SUPPLY DEVICE AND IMAGE FORMING APPARATUS - A power supply device includes a transformer including a primary coil, a secondary coil, and a tertiary coil; a switching element connected via the primary coil to a direct-current power supply; a first rectifying-and-smoothing circuit rectifying and smoothing a voltage generated in the secondary coil; a control circuit turning on and off the switching element; a second rectifying-and-smoothing circuit rectifying and smoothing a voltage generated in the third coil to generate a driving voltage for the control circuit; and a starting circuit including a first transistor, a first resistor, and a first capacitor connected in series between the direct-current power supply and a ground, a second transistor connected between the direct-current power supply and the second rectifying-and-smoothing circuit, and a turn-off unit turning off at least the second transistor out of the first transistor and the second transistor when the first capacitor is charged to a predetermined voltage. | 09-15-2011 |
20110222314 | POWER SUPPLY WITH REDUCED POWER CONSUMPTION - A power supply includes an isolated power converter and a DC/DC converter. The isolated power converter includes a primary winding connected to a primary power stage, a secondary winding to generate a first output voltage, and an auxiliary winding at the primary side to generate a voltage signal proportional to the first output voltage to stabilize the first output voltage. The DC/DC converter converts the first output voltage into a second output voltage for supplying for a load. | 09-15-2011 |
20110235367 | DC TO DC CONVERTER - A DC to DC converter includes an input terminal, an output terminal, first and second switches, an inductor, a smoothing unit, a first impedance element, a first resistor element, an operational amplifier and a control unit. The first switch is connected to the input terminal. The second switch is connected to the first switch and a ground terminal. The inductor is connected to the first switch and the output terminal. The smoothing unit is connected to the inductor and the ground terminal. The first impedance element is connected to the smoothing unit. The first resistor element is connected in series with the first impedance element. The operational amplifier is connected to the first impedance element. Reference voltage is added to the operational amplifier. The control unit controls the first and second switches according to a control signal outputted from the operational amplifier. | 09-29-2011 |
20110249472 | PWM CONTROL OF DUAL ACTIVE BRIDGE CONVERTERS - A Dual Active Bridge (DAB) converter and a Pulse Width Modulation (PWM) scheme for controlling the DAB converter are disclosed. In general, the DAB converter includes a transformer, a first H-bridge that is connected to a primary winding of the transformer and controlled via first control signals, and a second H-bridge that is connected to a secondary winding of the transformer and controlled via second control signals. A controller provides the first and second control signals based on an input-to-output voltage ratio and load of the DAB converter such that, in addition to phase shift control, PWM control is simultaneously applied to both the first H-bridge and the second H-bridge when the DAB converter operates at low power and PWM control is applied to only one of the first H-bridge and the second H-bridge when the DAB converter operates above low power. | 10-13-2011 |
20110261589 | POWER CONVERTER WITH ELECTRICAL SWITCHING ELEMENT - A power converter is preferably mounted in a vehicle. The converter has a power converting unit including an electrical switching element electrically switched on and off selectively in response to a duty ratio of PWM (pulse-width modulation) signal given to the switching element. The converter further has a controller including a drive unit that generates the PWM signal, in addition to a controlling unit and a limiting unit. The controlling unit controls the duty ratio of the PWM signal such that a voltage inputted to the power converter is converted to a voltage to be outputted depending on the duty ratio. The limiting unit limits at least one of a time change amount of the duty ratio of the PWM signal and a maximum duty ratio of the PWM signal. | 10-27-2011 |
20110292687 | High Voltage Capacitive Power Transformer - A high voltage transformer for transforming electric power from a high voltage direct current source to a lower voltage direct current or to a lower voltage alternating current, without intermediate magnetic transformation. The transformer has a number of stages. Each stage includes capacitors and switching devices. There is a controller that controls the switching devices to change the polarity of one or more capacitors. | 12-01-2011 |
20120020117 | ELECTROMECHANICAL INDUCTORS AND TRANSFORMERS - Devices and systems for power electronic circuits are provided. Embodiments of the present invention enable high density inductive energy storage by using electromechanical coupling between an electrically conducting inductive element and a mechanical resonator to passively store energy via both electromagnetic and mechanical mechanisms. A microelectromechanical inductor (MEMI) is provided utilizing a magnet and a conductor. In a specific embodiment, the MEMI includes a permanent magnet on a compliant layer centrally disposed within a spiral coil. In a further embodiment, a second coil is provided near the magnet to provide a resonating transducer. | 01-26-2012 |
20120033449 | Control for an Electrically Adjustable Piece of Furniture - A control module includes a control unit that is configured to control an electrically adjustable item of furniture, and a switched mode power supply that is configured to supply the control unit. The control unit and power supply are integrated into a common housing. The switched mode power supply is configured to be switched to an idle operating state depending on a ready signal. The switched mode power supply includes, in a second stage, a switched mode regulator component, the supply voltage of which is made available in the idle operating state by a starting circuit in a clocked manner. The starting circuit has an energy store and a resistive element. The energy store and the resistive element are dimensioned so that, in the idle operating state, an interval for charging the energy is longer than an interval for discharging the energy store by the switched mode regulator component. | 02-09-2012 |
20120087153 | INDIRECT D. C. CONVERTER WITH A SWITCHING FREQUENCY BEING DEPENDENT ON THE LOAD AND THE INPUT VOLTAGE AND A DEAD TIME DEPENDING ON THE SWITCHING FREQUENCY (Also Known as CONTROL CIRCUITRY, VOLTAGE CONVERTER, METHOD, AND COMPUTER PROGRAM) - A control circuitry for controlling operation of switches of a non-regulated DC-to-DC converter is disclosed. The converter comprises a transformer having a primary winding, which is arranged to be excited by means of electricity provided through the switches, and an output connected to at least one secondary winding of the transformer via a rectifier circuitry and suitable to provide an output voltage to a load circuitry. The control circuitry comprises measuring means arranged to determine a load caused by any load circuitry; and adjustment means arranged to adjust a switching frequency for operating the switches in response to the determined load such that the switching frequency is decreased for an increased load and vice versa. A non-regulated DC-to-DC converter, a method for controlling operation of switches, and a computer program are also disclosed. | 04-12-2012 |
20120163034 | SWITCHING MODE POWER SUPPLY HAVING MULTIPLE OUTPUT - There is provided a switching mode power supply having multiple outputs, including: a DC/DC converter converting a DC voltage level according to a change in a load and including a primary coil and a secondary coil; a boost unit boosting an output voltage of the DC/DC converter in a first mode and outputting the boosted output voltage to an output terminal; a bypass unit bypassing the output voltage of the DC/DC converter in a second mode, to output the bypassed voltage to the output terminal; and a boosting controller controlling the boost unit according to a voltage detected at a center tab of the secondary coil of the DC/DC converter. | 06-28-2012 |
20120230058 | NON-CONTACT POWER TRANSMISSION APPARATUS - A non-contact power transmission apparatus includes a high-frequency converting section, which converts input voltage to high-frequency voltage and outputs it, a primary coil, which receives high-frequency voltage from the high-frequency converting section, and a secondary coil, which receives electric power from the primary coil. The non-contact power transmission apparatus further includes a load to which the electric power received by the secondary coil is supplied, a rectifier located between the secondary coil and the load, and an output adjusting section, which supplies, as pulses, output voltage to the high-frequency converting section. The output adjusting section is configured to increase or reduce output to the load by adjusting a duty cycle of the pulse output. | 09-13-2012 |
20120243262 | POWER SUPPLY SYSTEM - A power supply system includes an electromagnetic interference (EMI) filter circuit, a rectifier and filter circuit, a switch circuit, a transformer, a feedback circuit and a controller. The feedback circuit includes a voltage divider circuit, a filter circuit, and a voltage and temperature compensation circuit. The voltage divider circuit generates a voltage dividing signal, and includes a first lossless element and a second lossless element connected in series between an output of the transformer and the ground, and the voltage dividing signal is generated at a node of the first and second lossless elements. The filter circuit filters the voltage dividing signal into a direct current (DC) signal. The voltage and temperature compensation circuit does voltage compensation and temperature compensation to the DC signal to generate a feedback signal, and sends the feedback signal to the controller. | 09-27-2012 |
20120257419 | COIL BOBBIN, COIL COMPONENT AND SWITCHING POWER SOURCE APPARATUS - To improve insulating properties of a coil winding having three turns. In a coil bobbin, insulation between mutually adjacent winding members of a first coil winding are achieved by a projecting section. Furthermore, the first coil winding and the second coil winding are insulated from each other by the flange section. Moreover, the projecting sections and the projecting sections are respectively provided in positions at either end when the first coil winding and the second coil winding are viewed in a direction perpendicular to the direction of the axis line. Consequently, even with coil windings having three turns, insulation between the windings is achieved by means of this coil bobbin, and furthermore, insulation is also achieved in the region outside the coil windings as viewed in a direction perpendicular to the axis line direction, thereby making it possible to improve the insulating properties without increasing the number of parts. | 10-11-2012 |
20120262947 | INTEGRATED CONTROL CIRCUIT OF SETTING BROWN-IN VOLTAGE AND COMPENSATING OUTPUT POWER AND METHOD FOR OPERATING THE SAME - An integrated control circuit of setting brown-in voltage and compensating output power and a method for operating the same are disclosed. The integrated control circuit is applied to a power supply. The integrated control circuit includes a control unit and a voltage regulation unit. The control unit has a control pin and a driven current outputs from or inputs into the control unit via the control pin. The voltage regulation is electrically connected to a DC input voltage terminal of the power supply and the control unit, thus receiving a DC input voltage and the driven current. By dividing the DC input voltage and the produced voltage by the driven current, a compound voltage is produced. Therefore, the fixed brown-in voltage is set and the output power is compensated when the power supply is operated under different input voltage levels. | 10-18-2012 |
20120275195 | Low Noise, Highly Isolated Power Supply - A power supply may include a power transformer having a primary winding and a secondary winding, one end of the secondary winding connected to ground, and a shielded isolation transformer having a third winding, a fourth winding, and a shield, wherein the third winding is connected to the secondary winding and the shield is connected to ground. Primary side circuits may receive input power and generate a primary AC signal to drive the primary winding. Secondary side circuits may convert a secondary AC signal output from the fourth winding into a DC output. | 11-01-2012 |
20120294043 | PARASITIC POWER SUPPLY AND SENSOR APPARATUS INCLUDING A POWER SUPPLY - A parasitic power supply derives power from its proximity to an electrical power conductor. The power supply includes a transformer having a coil disposed on a core structured to be disposed parallel to the power conductor. The coil has a voltage induced by current flowing in the power conductor. A voltage regulating circuit cooperates with the transformer and includes a capacitor having a voltage, a charge switch structured to charge the capacitor from the coil voltage, a bootstrap circuit structured to enable the charge switch to charge the capacitor when the capacitor voltage is below a first predetermined value, a charge controller structured to enable the charge switch to charge the capacitor when the capacitor voltage is below a second predetermined value, and a voltage regulator powered by the capacitor voltage. | 11-22-2012 |
20120294044 | HIGH-VOLTAGE POWER SUPPLY - Provided is a high-voltage power supply including a board having at least one bent portion separating a first region of the board from a second region of the board, the first region not being coplanar with the second region of the board; a first circuit, on the first region of the board, generating a second voltage according to a first voltage; and a second circuit, on the second region of the board, amplifying the second voltage and then rectifying the amplified second voltage. | 11-22-2012 |
20120307525 | ARRANGEMENT FOR CURRENT CONVERSION WITH AN INVERTER - An arrangement for converting current is provided, wherein the terminals of the primary side are led out from the high-current transformer on a first side of the high-current transformer, and the terminals of the secondary side are led out from the high-current transformer on a second side of the high-current transformer. The inverter is arranged on the first side of the high-current transformer and the at least one capacitor is arranged on the second side of the high-current transformer, and the at least one first terminal of the secondary side of the high-current transformer is connected directly, without an intermediately connected electrical line, with the first terminal of the at least one capacitor. | 12-06-2012 |
20120327688 | PARALLELED POWER CONVERTERS WITH AUTO-STAGGER START-UP - A power conversion system includes a shared output bus and a plurality of power conversion units coupled to the shared output bus. Each power conversion unit includes a power converter having a converter output coupled to the shared output bus and a delay generator that generates a start-up delay for the power converter if a pre-bias value of a bus voltage on the shared output bus is greater than a predefined threshold. Each power conversion unit also includes a voltage controller that controls the converter output subsequent to the start-up delay and maintains a current sourcing condition of the converter output during start-up of the power converter. The power conversion system also includes a load that is coupled to the shared output bus. A method of operating a power conversion unit is also provided. | 12-27-2012 |
20130003419 | Automatic Breaker Apparatus for USB Power Supply - An automatic breaker apparatus for the USB power supply, comprising a manual switch module, a relay, a high frequency transformer, a PWM power source master control module, a drive module, a signal filter module, an MCU master control module, a lighting instruction module and at least one USB power output end. When a user presses down the manual switch module, the relay becomes conductive, thus causing the electronic apparatus connected to the USB power source input end to be charged, and determining through the MCU master control module whether the electronic apparatus is using the electric current based on the pulsed filter signal outputted by the signal filter module thereby driving the relay to disconnect and also starting the lighting instruction module to generate light. Upon disconnection in the relay, electric power can no longer be transferred to the USB power output end so as to embody the objective of automatic power break, thereby achieving the features of environment protection, reduced energy consumption and power saving. | 01-03-2013 |
20130027978 | CONTROL APPARATUS FOR DC-DC CONVERTER - An apparatus that controls a DC-DC converter including a switching element of which duty ratio is controlled by the apparatus to regulate the output voltage includes: acquiring device for acquiring the input voltage; converting device for converting the input voltage to a modulated signal representing the input voltage; first limiting section for limiting the duty ratio of the switching element in response to the input voltage represented by the modulated signal; first determining section for determining whether or not the modulated signal is in abnormal condition; and enabling section for enabling the DC-DC converter to continue to convert the input voltage to the output voltage when the determining section determines the abnormal condition. The enabling section includes second limiting section for limiting the duty ratio of the switching element, the second limiting section limits the duty ratio of the switching element when the determining section determines the abnormal condition. | 01-31-2013 |
20130033902 | SMOOTH MODE TRANSITION PLATEAU FOR A POWER SUPPLY CONTROLLER - A power converter controller is disclosed. An example controller includes a drive signal generator coupled to generate a drive signal to control a switching of a power switch to control a transfer of energy from an input of a power supply to an output of the power supply. A feedback circuit is coupled to receive a feedback signal representative of the output of the power supply. The feedback circuit coupled to generate a control signal in response to the feedback signal. An oscillator circuit is coupled to generate an oscillating signal in response to the control signal. The drive signal generator is coupled to generate the drive signal in response to the oscillating signal. A frequency of the oscillating signal increases from a first frequency to a second frequency with respect to the control signal for a first range of control signal values. The frequency of the oscillating signal remains substantially equal to the second frequency for a second range of control signal values. The frequency of the oscillating signal decreases from the second frequency to a third frequency with respect to the control signal for a third range of control signal values. The first range of control signal values is less than the second range of control signal values and the second range of control signal values is less than the third range of control signal values. | 02-07-2013 |
20130051081 | LINE FILTER, SWITCHING POWER SUPPLY MOUNTING LINE FILTER, AND IMAGE FORMING APPARATUS - A line filter for a switching power supply including a rectifier unit configured to rectify an AC voltage, a transformer configured to transform the voltage rectified by the rectifier unit to output a resultant voltage, a switching unit configured to drive the transformer, and a radiation unit configured to radiate heat generated during operation of the switching unit includes two capacitive elements connected in series between voltage supply lines to which the rectifier unit and the transformer are connected, and a current path configured to allow a noise current to flow between the transformer and the capacitive element. | 02-28-2013 |
20130070483 | Controlling Method, Power Supply, Power Controller, and Power Controlling Method - A power supply has an inductor and determines loading state of the power supply according to a compensation signal. When the loading state is determined to be a light loading state or a no-loading state, a switch is operated at a low operating frequency. When the loading state is determined to be a heavy loading state, the switch is operated at a high operating frequency. If the compensation signal exceeds a critical value, it is determined that the loading state is an overloaded state. When the overloaded state continues past a tolerable duration, the switch is turned off. The tolerable duration is determined by an external capacitor and is independent of the operating frequency. | 03-21-2013 |
20130077349 | ALTERNATING CURRENT/DIRECT CURRENT ADAPTOR AND SELF-ADAPTIVE VOLTAGE OUTPUT METHOD - An alternating current (AC)/direct current (DC) adaptor is to be coupled electrically with an electronic device having an electrical property, and includes a DC/DC converter that receives a DC voltage signal and a control signal, and that adjusts the DC voltage signal according to the control signal to obtain an output DC voltage signal. A device discriminator receives the output DC voltage signal, and generates, according to the output DC voltage signal and the electrical property, a device indication signal set. A controller obtains a target value according to the device indication signal set, and outputs the control signal according to an initial value or the target value to control voltage value of the output DC voltage signal provided to the electronic device. | 03-28-2013 |
20130088894 | POWER MODULE PROTECTION AT START-UP - A power conversion unit includes a power converter and a controller coupled to the secondary or output stage of the power converter. The power conversion unit is configured to generate an output test voltage or current during a pre-start test period of the power converter, where the output test voltage or current is monitored to determine a converter fault condition. A method of operating a power conversion unit is also included. | 04-11-2013 |
20130121030 | APPARATUS AND METHOD FOR SOFT SWITCHING IN A MEDIUM VOLATAGE TO LOW VOLTAGE CONVERTER - A switching and control arrangement are provided along with a transformer arrangement such that semiconductor-based switches can be used in a medium DC voltage to AC inverter in a medium voltage to low voltage DC to DC converter. The switching arrangement on the secondary side of the transformer arrangement controls a current ramp up or down of switches on the primary side of the transformer that are used to convert DC to AC, thereby permitting for soft switching of those switches. | 05-16-2013 |
20130121031 | MANAGEMENT OF COMMON MODE NOISE FREQUENCIES IN PORTABLE ELECTRONIC DEVICES - The disclosed embodiments provide a system that facilitates the use of a portable electronic device. During operation, the system detects a coupling of a power supply to the portable electronic device through a set of wires. Next, the system uses the set of wires to identify a type of the power supply. The system then periodically determines a switching frequency of the power supply based on the type of the power supply and a current drawn from the power supply. Finally, the system uses the switching frequency to facilitate the operation of a touch control in the portable electronic device. For example, if the switching frequency corresponds to a sensing frequency of the touch control, the system may change the sensing frequency to an alternative sensing frequency. | 05-16-2013 |
20130135902 | SWITCHING POWER SUPPLY CIRCUIT - A highly power-efficient switching power supply is realized. A switching power supply circuit of the present invention comprises: a pulse generation unit configured to generate a pulse for alternately opening and closing a first and a second switching elements; and a switching unit configured to input a voltage to the pulse generation unit in accordance with the detected power consumption level in the external load, wherein the pulse generation unit is configured so as to reduce the pulse width of the pulse that is generated if the voltage input from the switching unit is higher than a reference voltage, and to increase the pulse width of the pulse that is generated if the voltage input from the switching unit is lower than the reference voltage. | 05-30-2013 |
20130155724 | DETECTING OUTPUT DIODE CONDUCTION TIME FOR CABLE DROP COMPENSATION OF A POWER CONVERTER - An example controller for a power converter to provide power to a load through a distribution network includes a control circuit and a cable drop compensator. The control circuit outputs a drive signal to control switching of a switch to regulate an output of the power converter in response to a feedback signal. The cable drop compensator is coupled to adjust the feedback signal in response to a conduction time of an output diode of the power converter to compensate for a distribution voltage dropped across the distribution network. | 06-20-2013 |
20130155725 | METHOD FOR CURRENT CONTROL IN A DIRECT VOLTAGE NETWORK OF A DIRECT VOLTAGE CONVERTER AND A DIRECT VOLTAGE CONVERTER - A method for the control of a first current in a first direct voltage network which is connected to a direct voltage converter, wherein energy is transmitted between the first and a second direct voltage network via a transformation unit of the direct voltage converter, wherein a current control is provided for the control of a second current in the second direct voltage network. A second current setpoint is determined from a first current setpoint of the first direct voltage network based on a transfer function of the transformation unit, which second current setpoint is fed to the current control and therefore, due to the transformation ratio of the transformation unit, a first actual current of the current-control-free direct voltage network is controlled. | 06-20-2013 |
20130182461 | SYSTEM AND METHOD FOR POWER TRANSFER CONTROL - The present invention employs system and method in for distinguishing between power capabilities of various external power sources and a system that can communicate the identified power capabilities to the secondary side of the wireless power transfer system. Once the secondary side of the wireless power transfer system receives the power capability information, it adjusts the current available for a payload in accordance with the information received on power source capabilities. | 07-18-2013 |
20130201725 | RESONANT CIRCUIT AND RESONANT DC/DC CONVERTER - The present disclsure relates to a resonant circuit ( | 08-08-2013 |
20130208511 | SWITCH MODE POWER SUPPLY MODULE AND ASSOCIATED HICCUP CONTROL METHOD - The invention concerns a method and device for controlling the switching operation in a switch mode power supply module. The switch mode power supply module is intended to supply power to an item of equipment. The method comprises the steps of measuring, in the switch mode power supply module, the load current and comparing the measured load current with a predefined load current threshold value, and, cyclically interrupting the switching operation if the measured load current inside the device is less than the predefined load current threshold value. | 08-15-2013 |
20130250620 | CONTROL CIRCUIT FOR REDUCING TOUCH CURRENT OF A POWER CONVERTER AND OPERATION METHOD THEREOF - A control circuit for reducing touch current of a power converter includes an auxiliary pin, a zero-crossing signal generator, a feedback pin, a frequency limiting signal generator, and a gate signal generator. The auxiliary pin receives a voltage corresponding to an auxiliary winding of the power converter. The zero-crossing signal generator generates a zero-crossing signal according to the voltage and a first reference voltage. The feedback pin receives a feedback voltage corresponding to an output voltage of the power converter. The frequency limiting signal generator generates a frequency limiting signal according to the feedback voltage and a second reference voltage. The frequency limiting signal limits the gate control signal to a predetermined frequency. The gate signal generator generates a gate control signal to a power switch of the power converter according to the frequency limiting signal and the zero-crossing signal. | 09-26-2013 |
20130258718 | SYSTEM, METHOD, AND APPARATUS FOR POWERING EQUIPMENT DURING A LOW VOLTAGE EVENT - Low voltage ride through systems, methods, and apparatus are disclosed. An exemplary method includes applying real power from a photovoltaic array to an AC grid with an inverter, detecting a sag in the voltage in the AC grid, and responsive to the sag in the voltage in the AC grid, power from the photovoltaic array is utilized to provide power to at least one inverter-related component. When the sag in the voltage has abated, real power from the photovoltaic array is applied once again to the AC grid. | 10-03-2013 |
20130286689 | AC/DC POWER CONVERTER WITH IMPROVED POWER FACTOR AND IMPROVED THDI - A power converter including: a first controlled current source configured to control current flowing on a DC supply bus of the converter, a switch connected to a second current source and to a third current source and to each of input phases of the converter, a first controller configured to control the first current source to impose a current on the DC supply bus, and a second controller synchronized with the first controller and configured to control the second current source and the third current source to impose a current on one of the input phases selected with aid of the switch. | 10-31-2013 |
20130294110 | ELECTROMAGNETIC ENERGY-FLUX REACTOR - Systems and methods for providing power to a load are provided. One system includes a first reactor including a first plurality of coils. A first coil of the first plurality of coils is configured to generate a first magnetic field, and a plurality of second coils of the first plurality of coils are configured to generate a plurality of second magnetic fields that vary an intensity of the first magnetic field. The system further comprises a second reactor comprising a second plurality of coils, wherein the second plurality of coils are configured to tune the first reactor to the load. The first reactor is configured to provide the power to the load, and the second reactor is configured to increase the power provided to the load by increasing an intensity of the second magnetic fields generated by the second coils and tuning the first reactor to the load. | 11-07-2013 |
20130301301 | POWER OVER ETHERNET TO USB ADAPTER - A power adapter comprising a POE connector for receiving electrical power from the power lines of a POE cable, a transformer circuit and a USB connector for delivering electrical power to a USB powered device, wherein a POE cable provides power to the USB powered device. The power adapter can have a POE receptacle for receiving an Ethernet plug, to receive the POE power, and a USB receptacle to receive a USB plug from a USB powered device, or dedicated wires from one or more of the POE power supply and/or the USB powered device. | 11-14-2013 |
20130301302 | POWER SUPPLY AND POWER CONTROLLER - Power supplies and power controllers are disclosed. A disclosed power supply has a power controller, a power switch, an auxiliary winding, a first circuit and a second circuit. The power controller is a monolithic integrated circuit with a multi-function pin and a gate pin. A control node of the power switch is coupled to the gate pin. The first circuit is coupled between the multi-function pin and the auxiliary winding and has a diode. The second circuit is coupled between the multi-function pin and a ground line, and has a thermistor. | 11-14-2013 |
20130301303 | POWER CONTROLLERS AND CONTROL METHODS - Disclosed include power controllers and related control methods. A disclosed power controller has a pulse generator, a sample/hold device, a comparator, and a switch controller. The pulse generator provides an enable signal, defining an enable time. The comparator has two inputs capable of being coupled to a reference signal and a feedback signal, respectively, and an output coupled to a compensation capacitor. When enabled by the enable signal, the comparator charges/discharges the compensation capacitor. The switch controller controls a power switch according to a compensation voltage of the compensation capacitor. A feedback voltage of the feedback signal is able to correspond to an output voltage of the power supply. | 11-14-2013 |
20130322124 | POWER SUPPLY WITH INTERFERENCE SUPPRESSION, AND METHOD FOR OPERATING A POWER SUPPLY - A switched-mode power supply comprises a transformer with a primary winding and a secondary winding. A switch is coupled in series with the primary winding and configured to repeatedly interrupt a current through the primary winding. An inductor is located differently with reference to magnetic fields that the primary and secondary windings are configured to induce. A connection exists between the inductor and a circuit that contains one of the primary and secondary windings. The connection is configured to connect from the inductor to the circuit a first voltage that has a waveform representative of and a polarity opposite to a second voltage induced in the switched-mode power supply by leakage flux of the transformer at a switching moment of the switch. | 12-05-2013 |
20130329462 | POWER LIMITING BY MODULATING CLOCK - A clock generation circuit for use in a power converter controller includes a modulation signal generator that is coupled to generate a modulation signal in response to an input sense signal representative of an input voltage of a power converter. The modulation signal is responsive to the input sense signal when the input sense signal is greater than a first input threshold. A clock modulator circuit is coupled to receive the modulation signal and a first clock signal from an oscillator. The clock modulator circuit is coupled to generate a second clock signal in response to the first clock signal and the modulation signal. An average frequency of the second clock signal is responsive to the modulation signal. | 12-12-2013 |
20140016358 | Voltage Waveform Detector, Power Controller and Control Method for Switched-Mode Power Supplies with Primary-Side Control - Disclosed are a voltage waveform detector, a power controller and a control method used therein, adaptive for a switched-mode power supply having a power switch and an inductive device. A disclosed power controller has a voltage waveform detector and a constant-current control unit. The voltage waveform detector estimates a discharge time of the inductive device when the power switch is turned off. In the voltage waveform detector, a differential capacitor is coupled between an input node of a comparator and a feedback node, at which the feedback voltage corresponds to a reflection voltage of the inductive device. The constant-current control unit integrates a current-detection signal over the discharge time to control a maximum output current of the switched-mode power supply. | 01-16-2014 |
20140029309 | POWER CONVERTER WITH LOW RIPPLE OUTPUT - A power supply includes two or more input waveforms being shaped or selected so that after being separately level-shifted and rectified, their additive combination results in a DC output waveform with substantially no ripple. The power supply may comprise a waveform generator, a level conversion stage for step up or down conversion, a rectification stage, and a combiner. The waveform generator may generate complementary waveforms, preferably identical but phase offset from each other, such that after the complementary waveforms are level-converted, rectified and additively combined their sum will be constant, thus requiring no or minimal smoothing for generation of a DC output waveform. The level conversion may be carried out using transformers or switched capacitor circuits. Feedback from the DC output waveform may be used to adjust the characteristics of the input waveforms. | 01-30-2014 |
20140049990 | SOFT-SWITCHING HIGH VOLTAGE POWER CONVERTER - In a general aspect, a charge transfer includes a transformer including a plurality of primary windings and a plurality of galvanically isolated secondary windings, a first plurality of resonant converters having input terminals connected in series to an input power terminal and having output terminals connected to different primary windings of the plurality of primary windings, a second plurality of resonant converters having input terminals connected to different secondary windings of the plurality of secondary windings and having output terminals connected to a galvanically isolated power terminal, and a control system for controlling a transfer of electric charge between the input power terminal and the galvanically isolated output power terminal including controlling a first plurality of switches of the first plurality of resonant converters and a second plurality of switches of the second plurality of resonant converters in a zero current soft switching mode. | 02-20-2014 |
20140078781 | POWER SUPPLY CIRCUIT AND POWER SUPPLY APPARATUS - A power supply circuit includes: a depression mode transistor that includes a field plate; an enhancement mode transistor to which a source electrode and a drain electrode of the depression mode transistor are coupled; and a constant current source that is coupled to a connection node between the depression mode transistor and the enhancement mode transistor. | 03-20-2014 |
20140092633 | ELECTROMECHANICAL INDUCTORS AND TRANSFORMERS - Devices and systems for power electronic circuits are provided. Embodiments of the present invention enable high density inductive energy storage by using electromechanical coupling between an electrically conducting inductive element and a mechanical resonator to passively store energy via both electromagnetic and mechanical mechanisms. A microelectromechanical inductor (MEMI) is provided utilizing a magnet and a conductor. In a specific embodiment, the MEMI includes a permanent magnet on a compliant layer centrally disposed within a spiral coil. In a further embodiment, a second coil is provided near the magnet to provide a resonating transducer. | 04-03-2014 |
20140098569 | METHOD AND APPARATUS FOR DIGITAL ISOLATION USING PLANAR MAGNETIC CIRCUITS - A digital isolation circuit includes an encode circuit, a planar magnetic circuit, and a decode circuit. The encode circuit receives an input signal and divides the input signal into a first signal pulse and a second signal pulse. The planar magnetic circuit is coupled to an output of the encode circuit. The planar magnetic circuit includes a primary winding, a secondary winding and a magnetic core. The primary winding is magnetically coupled to the secondary winding through the magnetic core to generate an isolated output signal in response to the pair of signal pulses. The decode circuit receives the isolated output signal from the secondary winding to generate an output signal substantially identical to input signal. A method of digitally isolating a square wave input signal from an output signal using the digital isolation circuit is also disclosed. | 04-10-2014 |
20140098570 | CONTROLLER FOR CONTROLLING A POWER CONVERTER TO OUTPUT CONSTANT POWER AND RELATED METHOD THEREOF - A controller for controlling a power converter to output constant power includes a current sensing module, a voltage generation module, and a voltage regulation module. The current sensing module generates a sensing current according to an output current flowing through a secondary side of the power converter. The voltage generation module generates a set voltage corresponding to a reciprocal of the sensing current according to the sensing current. The voltage regulation module generates a regulation voltage to a feedback circuit of the secondary side of the power converter according to the set voltage and a sensing voltage corresponding to an output voltage of the secondary side of the power converter. The feedback circuit and a primary side of the power converter regulate the output voltage according to the regulation voltage, where a product of the output voltage and the output current is a constant value. | 04-10-2014 |
20140104887 | PROGRAMMING OF AN INTEGRATED CIRCUIT ON A MULTI-FUNCTION TERMINAL - Methods and apparatuses for programming a parameter value in an IC (e.g., any power electronic device, such as a controller of a power converter) are disclosed. The parameter can be selected/programmed by selecting a clamp using an external optional (selectively inserted) diode coupled to a multi-function programming terminal. In particular, a controller IC for a power converter can be externally programmed via one or more multiple function terminals during startup of the converter to select between two or more options using the external programming terminal(s). Once programming is complete, internal programming circuitry may be decoupled from the programming terminal and during normal operation the programming terminal may then be used for another function, such as a bypass (BP) terminal to provide a supply voltage to the IC or other required functionalities. | 04-17-2014 |
20140153287 | SYSTEM AND METHOD FOR IMPROVING POWER CONVERSION EFFICIENCY - A power conversion system includes at least one switching unit. The switching unit includes a switching device including a channel and a body diode integrated with the channel. The switching device includes a first terminal, a second terminal, and a third terminal. The channel provides a positive direction current flow path to allow a positive direction current to flow through in response to a first turn-on switching control signal supplied to the first terminal. The body diode provides a first negative direction current flow path to allow a negative direction current to flow through in response to a first turn-off switching control signal. The channel provides a second negative direction current flow path to allow the negative direction current to flow through in response to a second turn-on switching control signal. | 06-05-2014 |
20140160798 | Voltage Converting Circuit of Active-Clamping Zero Voltage Switch - The present invention relates to a voltage converting circuit of active-clamping zero voltage switch, consisting of a transformed unit, a primary-side input unit, a second-side output unit, and a first switch, wherein the primary-side input unit has a clamping capacitor and a second switch, which are used for avoid from the production of spike voltage on the first switch when the first switch is turned off, so as to increase the voltage conversion efficiency of the voltage converting circuit. | 06-12-2014 |
20140177280 | SYSTEMS AND METHODS FOR SOURCE SWITCHING AND VOLTAGE GENERATION - System and method for regulating a power conversion system. An example system controller for regulating a power conversion system includes a first controller terminal associated with a first controller voltage and coupled to a first transistor terminal of a first transistor, the first transistor further including a second transistor terminal and a third transistor terminal, the second transistor terminal being coupled to a primary winding of a power conversion system, a second controller terminal associated with a second controller voltage and coupled to the third transistor terminal, and a third controller terminal associated with a third controller voltage. The first controller voltage is equal to a sum of the third controller voltage and a first voltage difference. The second controller voltage is equal to a sum of the third controller voltage and a second voltage difference. | 06-26-2014 |
20140211510 | Voltage Sensing in a Voltage Converter - A method for sensing an output voltage in a voltage converter includes at least one switching element and a transformer. A voltage is sampled across an auxiliary winding or a signal obtained from the voltage across an auxiliary winding in order to obtain a plurality of samples after the at least one switching element has assumed a first operation state and until the auxiliary voltage reaches a predefined threshold. The auxiliary winding is inductively coupled with the transformer. At least one sample obtained is evaluated before the auxiliary voltage reaches the predefined threshold. | 07-31-2014 |
20140211511 | CONTROLLER FOR DETECTING AN OUTPUT CURRENT OF A POWER CONVERTER, DEVICE FOR DETECTING AN AVERAGE OUTPUT CURRENT OF A POWER CONVERTER, METHOD FOR DETECTING AN AVERAGE OUTPUT CURRENT OF A POWER CONVERTER, AND METHOD FOR DETECTING AN OUTPUT CURRENT OF A POWER CONVERTER - A device for detecting an average output current of a power converter includes a current generation unit, a first voltage generation unit, a first current mirror unit, and a second current mirror unit. The current generation unit generates a first charge current according to an intermediate voltage. The first voltage generation unit generates a first node voltage according to the first charge current, a first discharge current, a turning-on time, and an inverse turning-on time. The first current mirror unit generates a first current according to the first node voltage, and generates a second voltage corresponding to the average output current of a secondary side of the power converter according to the first current. The second current mirror unit generates the first discharge current according to the first current. | 07-31-2014 |
20140211512 | SPLIT PHASE SYNCHRONIZATION OF WELDER/CUTTER INVERTER MODULES FOR RIPPLE IMPROVEMENT - A modular power supply is provided. The modular power supply includes multiple inverters and a controller. Each inverter is configured to receive an input voltage and provide an output to a load. The controller is configured to provide a synchronization signal to each inverter of the plurality of inverters. | 07-31-2014 |
20140247624 | PASSIVELY SWITCHED CONVERTER AND CIRCUITS INCLUDING SAME - The invention provides a passive converter comprising an input for electrical coupling to an intermittent or variable power source, an output for electrical coupling to load, and a conversion circuit for converting from a first voltage level of the input to a second voltage level suitable for the output, wherein the conversion circuit includes a passive switching circuit adapted to passively couple the input to the output when the input exceeds a first threshold and decouple the input from the output when the input falls below a second threshold. In particular, the passive switching circuit preferably comprises a spark gap, thyristor and avalanche diode, breakover diode, discharge tube, or a thyristor operated as breakover diodes. Circuits and dielectric elastomer generator (DEG) systems including the passive converter are also disclosed. | 09-04-2014 |
20140254201 | POWER SUPPLY FOR PROLONGING HOLD-UP TIME - A power supply for prolonging a hold-up time includes a main power supply system, and a hold-up power supply system connected in parallel to a power factor correction unit in the main power supply system. The hold-up power supply system includes an isolation transformer element connected to the power factor correction unit for receiving and transforming a first power to a third power, a power storage element for receiving the third power and storing as a hold-up power, and a power comparison unit connected between the power factor correction unit and the power storage element. The power comparison unit compares a second power generated from phase modulation performed by the power factor correction unit and the hold-up power, and outputs the hold-up power when the second power is smaller than the hold-up power, so as to sustain the power modulation unit to continue operating for a hold-up time. | 09-11-2014 |
20140268889 | Devices and Methods for Compensating for a Voltage Imbalance Within a Power Supply - Example devices and methods for compensating for a voltage imbalance within a power supply are provided. In one example, a device comprises a plurality of transformers coupled in series and having respective outputs coupled together, and the plurality of transformers are configured to receive an input voltage. Transformers of the plurality of transformers are configured to receive a capacitor voltage as the input voltage. The device also comprises a control module configured to receive the input voltage as input to each of the plurality of transformers and a feedback signal that includes an output of the series of transformers, and the control module is configured to control switching devices for each of the plurality of transformers so as to control operation of the plurality of transformers to compensate for a voltage imbalance of the voltage across the capacitor. | 09-18-2014 |
20140293655 | REACTOR, CONVERTER, AND POWER CONVERTER APPARATUS | 10-02-2014 |
20140293656 | DC TO DC CONVERTER ASSEMBLY - A DC to DC converter assembly, for connecting first and second high voltage DC power transmission networks, comprising first and second modular multilevel converters, each converter including a first converter limb having first and second limb portions, each limb portion including a least one module switchable to selectively provide a voltage source and thereby vary the magnitude ratio of a DC voltage (V1, V2) across the first and second terminals of a respective converter and an AC voltage (VAC) at the third terminal of the corresponding converter, the DC to DC converter assembly further including a first link electrically connecting the third terminal of one converter, with the third terminal of the other converter, and at least one converter further including a controller configured to switch the first and second limb portions in the first converter limb of the said converter into simultaneous conduction to divert a portion (IDiV1) of current flowing within the said converter away from the first link. | 10-02-2014 |
20140307478 | PRIMARY-SIDE BURST MODE CONTROL SCHEME FOR LLC CONVERTERS - An LLC converter having a primary side burst control circuit, and a secondary side regulator circuit. The primary side burst control circuit has an inner feedback loop circuit for adjusting the LLC operating frequency to control the power drawn by the LLC converter proportional to an optical feedback signal. | 10-16-2014 |
20140307479 | METHOD AND APPARATUS FOR SENSING MULTIPLE VOLTAGE VALUES FROM A SINGLE TERMINAL OF A POWER CONVERTER CONTROLLER - A controller for use in a power converter includes a switching control and a sensor. The switching control generates a first signal to control switching of a power switch between a first state and a second state. The sensor receives a second signal from a single terminal of the controller during at least a portion of the time that the power switch is in the first state and during at least a portion of the time that the power switch is in the second state. The second signal is representative of a line input voltage during at least the portion of time that the power switch is in the first state and is representative of an output voltage during at least the portion of time that the power switch is in the second state. The sensor is coupled to be responsive to the first signal. | 10-16-2014 |
20140313782 | POWER ADAPTOR - A power adaptor is provided. The power adaptor includes a voltage converter, a connecting port, a first transformer and a controller. The voltage converter receives an input voltage and determines whether to convert the input voltage to an output voltage according to an indicating signal. The first transformer includes a primary side and a secondary side. The primary side and the secondary side are coupled to each other, and a first end and a second end of the secondary side are coupled to the connecting port, respectively. The controller generates the indicating signal according to a voltage at the primary side of the first transformer. The connecting port is used to connect to an electrical device, and when the connecting port is electrically connected to the electrical device, a first end and a second end of the secondary side are short to a reference ground end of the secondary side. | 10-23-2014 |
20140334185 | SWITCHING POWER SUPPLY APPARATUS - A switching power supply apparatus includes an isolated converter that has efficiency characteristics in which power conversion efficiency at a rated load is higher than power conversion efficiency at a light load and that converts power-supply voltage into direct-current voltage to output the direct-current voltage; an FET that switches supply and shutoff of the power-supply voltage to the isolated converter; a secondary battery that stores the direct-current voltage output from the isolated converter; a voltage detector that detects an amount of charge in the secondary battery; and a controller that switches the FET on the basis of the amount of charge in the secondary battery. | 11-13-2014 |
20140340938 | FLYBACK CONVERTER USING COAXIAL CABLE TRANSFORMER - Disclosed is a flyback converter using a coaxial cable transformer which includes: a flyback driving unit that supplies a primary current; a transformer that is formed by winding a cable, which has a plurality of inner conductors as a primary cable and an outer conductor enclosing the inner conductors as a secondary cable, around a magnetic core and by connecting both ends of the primary cable and that receives the primary current and outputs a secondary current in accordance with the turn ratio of the primary cable and the secondary cable; a rectifying diode that rectifies the secondary current; and an output capacitor that smoothes a voltage through the rectifying diode. | 11-20-2014 |
20140355308 | OVERNIGHT POWER ADAPTER - Techniques and devices related to power adapters for mobile devices and, in particular, small form factor power adapters that allow a voltage droop during a power pulse exceeding a maximum output of the power adapter are discussed. For example, a small form factor and low voltage power adapter may include an adapter output power protection control that limits an output of the power adapter in response to a power pulse exceeding a maximum output of the power adapter. | 12-04-2014 |
20150016150 | MULTI-PHASE CONVERTER - Disclosed is a multi-phase converter comprising a plurality of electric phases, each of which can be triggered by a switching means. At least one coupling means ( | 01-15-2015 |
20150036388 | COMPACT STRUCTURE OF POWER-SUPPLY APPARATUS CAPABLE OF MINIMIZING ELECTROMAGNETIC NOISE - A power-supply apparatus is provided which includes a transformer, a primary semiconductor unit, a secondary semiconductor unit, and a secondary electronic device. Each of the primary semiconductor unit and the secondary semiconductor units has a plurality of semiconductor devices installed therein. The transformer, the primary semiconductor unit, the secondary semiconductor unit, and the secondary electronic device are electrically joined through connecting conductors. The transformer is laid on the primary semiconductor unit to make a first stack. Similarly, the secondary electronic device is laid on the secondary semiconductor unit. This permits the power-supply apparatus to be reduced in overall size thereof and minimizes adverse effects of electromagnetic noise to ensure the high efficiency in power supply operation. | 02-05-2015 |
20150062970 | CONTROLLERS, POWER SUPPLIES AND CONTROL METHODS - Power supplies together with related over voltage protection methods and apparatuses. A power supply has a transformer including a primary winding and an auxiliary winding. A power switch is coupled to the primary winding and a sensing resistor coupled between the power switch and a grounding line. A multi-function terminal of a controller is coupled to the sensing resistor. A diode and a first resistor is coupled between the auxiliary winding and the multi-function terminal. | 03-05-2015 |
20150138837 | MAGNETIC BALANCED CONVERTER WITH ISOLATION BARRIER - A converter with at least one primary side having a first set of coils magnetically coupled to at least one secondary side having at least a second set of coils, wherein the primary side is electrically isolated from the secondary side by an isolation barrier, wherein one of the secondary sides is configured to be connected to an external output unit, wherein the primary side is magnetically coupled to another secondary side having a third set of coils which coils are configured to be coupled to an external input unit, wherein the two secondary sides are electrically isolated from each other by a second isolation barrier, wherein the three sets of coils are magnetically coupled to each other via a common magnetic path. The converter provides an isolated current-to-current transfer between the input side and the output side which replicates the input current with high accuracy. | 05-21-2015 |
20150318789 | SYSTEMS AND METHODS FOR SOURCE SWITCHING AND VOLTAGE GENERATION - System and method for regulating a power conversion system. An example system controller for regulating a power conversion system includes a first controller terminal associated with a first controller voltage and coupled to a first transistor terminal of a first transistor, the first transistor further including a second transistor terminal and a third transistor terminal, the second transistor terminal being coupled to a primary winding of a power conversion system, a second controller terminal associated with a second controller voltage and coupled to the third transistor terminal, and a third controller terminal associated with a third controller voltage. The first controller voltage is equal to a sum of the third controller voltage and a first voltage difference. The second controller voltage is equal to a sum of the third controller voltage and a second voltage difference. | 11-05-2015 |
20150349645 | POWER CONVERTER CONTROLLING METHOD - A power converter controlling method suitable for a power converter is disclosed. The power converter is configured to output a power to a load. The power converter includes a switch. The power converter controlling method includes the following steps. The power outputted from the power converter to the load is detected and a switching frequency of the switch is adjusted according to the power. When the power is greater than a load threshold, the power converter is set to a first working mode, and the switching frequency of the switch is adjusted according to the power in the first working mode. On the other hand, when the power is smaller than or equal to the load threshold, the power converter is set to a burst mode, and the switching frequency is fixed at a setting frequency value in the burst mode. | 12-03-2015 |
20160020699 | Switching Mode Power Supply Capable of Providing a Block Time in Response to an Output Current - A power controller provides a block time in response to an output current to an output load, and the block time determines a maximum switching frequency of a switching mode power supply. An exemplifying power controller has an output current estimator, a block time generator, and a pulse width modulator. The output current estimator provides a load representative signal in response to a discharge time of the inductive device and a current sense signal, wherein the current sense signal represents a current through an inductive device. The block time generator provides a block time based on the load representative signal. The pulse width modulator generates a pulse-width-modulation signal to control a power switch in response to a compensation signal, which is in response to the output voltage to the output load. The cycle time of the pulse-width-modulation signal is limited to be not less than the block time. | 01-21-2016 |
20160036333 | METHOD AND APPARATUS FOR SENSING MULTIPLE VOLTAGE VALUES FROM A SINGLE TERMINAL OF A POWER CONVERTER CONTROLLER - A controller includes a switching control coupled to switch a power switch of a power converter to regulate an output of the power converter. A sensor is coupled to receive a signal from a single terminal of the controller. The signal from the single terminal is representative of a line input voltage of the power converter during at least a portion of an on time of the power switch, and an output voltage of the power converter during at least a portion of an off time of the power switch. The switching control is responsive to an output of the sensor, and includes a first current source, an internal voltage supply coupled to the first current source, and a buffer circuit coupled to receive the signal from the single terminal. The first current source is coupled to supply a first current to the buffer circuit. | 02-04-2016 |
20160049875 | Transformer and Control method Thereof - A transformer includes a first switch, a first winding, a second winding, a third winding, a first current direction control unit, a second current direction control unit and a loading capacitor. The first switch is coupled between the second winding and the third winding. The first winding is disposed at a primary side and coupled between an input voltage terminal and a first ground. The second winding is disposed at a secondary side and coupled between a second ground and the first switch. The third winding is disposed at the secondary side. The first current direction control unit is coupled between the second winding and an output voltage terminal. The second current direction control unit is coupled between the third winding and the output voltage terminal. The first switch is turned on for adjusting a winding ratio when the transformer is used to output a high voltage. | 02-18-2016 |
20160079859 | POWER SUPPLY AND METHOD OF SUPPLYING POWER - A power supply includes power modules. Each of the power modules includes an input stage configured to convert an input voltage into an intermediate voltage, and an output stage configured to output a DC supply voltage according to the intermediate voltage. Input terminals of the input stages in the plurality of power modules are electrically connected in series, and the input stages are configured to be controlled with at least one first common control signal having a common duty cycle. Output terminals of the output stages in the plurality of power modules are electrically connected in parallel, and the output stages are configured to be controlled with at least one second common control signal having a common duty cycle. A method of supplying power is also disclosed herein. | 03-17-2016 |
20160085199 | ELECTRIC POWER SUPPLY CONTROL DEVICE WHICH CAN INCREASE POWER CONVERTING EFFICIENCY - An electric power supply control device comprises a first converter, at least one second converter, and an electrical voltage control unit. The second converter can work in intermittent oscillation, and converts outputting electrical voltage from the first converter. The electrical voltage control unit controls the outputting electrical voltage of the first converter, so that the outputting electrical voltage is equal to or less than a minimum value of upper limits of operating electrical voltage of the second converter, and is more than or equal to a maximum value of lower limits of operating electrical voltage of the second converter, and at least one of the second converter performs low electric power behavior. | 03-24-2016 |
20160087534 | METHODS AND POWER CONTROLLERS FOR PRIMARY SIDE CONTROL - Power controllers and related primary-side control methods are disclosed. A disclosed power controller has a comparator and an ON-triggering controller. The comparator compares a feedback voltage with an over-shot reference voltage. Based on an inductance-coupling effect, the feedback voltage represents a secondary-side voltage of a secondary winding. Coupled to the comparator, the ON-triggering controller operates a power switch at about a first switching frequency when the feedback voltage is lower than the over-shot reference voltage. The ON-triggering controller operates the power switch at about a second switching frequency when the feedback voltage exceeds the over-shot reference voltage. The second switching frequency is less than the first switching frequency. | 03-24-2016 |
20160134182 | INDIRECT REGULATION OF OUTPUT CURRENT IN POWER CONVERTER - A controller includes a multiplier block that is coupled to receive an input voltage signal, an input current signal, and an output voltage signal that are representative of a power conversion system. The multiplier block outputs a multiplier block output signal responsive to a product of the input voltage signal and the input current signal divided by the output voltage signal. A signal discriminator outputs a error signal responsive to the multiplier block output signal. The error signal is representative of a difference between a portion of the multiplier block output signal that is greater than a reference signal and a portion of the multiplier block output signal that is less than or equal to the reference signal. A switch controller generates a drive signal responsive to the error signal to control switching of a power switch to regulate an average output current of the power conversion system. | 05-12-2016 |
20160134192 | POWER SUPPLY SYSTEM - A power supply system includes a rectifier circuit, a voltage decreasing circuit, and a feedback circuit. The rectifier circuit receives an AC voltage, and converts the AC voltage to a rectifying DC voltage. The voltage decreasing circuit decreases the rectifying DC voltage to a first DC voltage. The feedback circuit includes a photoelectric coupler, a PWM controller, a voltage regulating tube, and a variable resistor. The photoelectric coupler includes a light emitting unit and a switch unit. The variable resistor detects a change of the first DC voltage, and outputs a regulating signal. The voltage regulating tube adjusts a current flowing through the light emitting unit. The switch unit detects the light from the light emitting unit and turns on. The PWM controller outputs PWM signals to the voltage decreasing circuit. The voltage decreasing circuit adjusts the first DC voltage according to a duty cycle of the PWM signals. | 05-12-2016 |
20160190916 | CONTROL CIRCUIT OF POWER CONVERTER - A control circuit of a power converter includes: an input signal detection circuit, configured to operably detect a magnitude of an input signal to generate a detection signal; a clock generation circuit, configured to operably generate a clock signal; an error detection circuit, configured to operably generate an error signal according to a reference signal and a feedback signal; a control signal generation circuit, coupled with the clock generation circuit and the error detection circuit, configured to operably control a switching frequency of a power switch according to the clock signal and the error signal; and a reverse adjusting circuit, coupled with the input signal detection circuit, configured to operably adjust the clock generation circuit or the control signal generation circuit according to the detection signal to configure the switching frequency of the power switch to be inversely proportional to the magnitude of the input signal. | 06-30-2016 |
20160254752 | System and Method for Compensating for Cable Voltage Loss at Various Output Voltages | 09-01-2016 |
20190149030 | ISOLATED POWER SUPPLY CIRCUIT AND ASSOCIATED CONTROL METHOD | 05-16-2019 |
20190149050 | HIGH SIDE SIGNAL INTERFACE IN A POWER CONVERTER | 05-16-2019 |