Patent application number | Description | Published |
20130257392 | POWER FACTOR CORRECTION CIRCUIT - The present disclosure provides a power factor correction circuit. The power factor correction circuit includes an AC power, a first bridge arm, a second bridge arm and at least one auxiliary capacitor. The AC power has first and second ends. The first bridge arm includes first and second switches connected in series with each other. A second terminal of the first switch is connected to a first terminal of the second switch, and is coupled to the first end of the AC power via a first inductor. The second bridge arm is connected in parallel with the first bridge arm, and includes third and fourth switches connected in series with each other. A second terminal of the third switch is connected to a first terminal of the fourth switch and the second end of the AC power. The auxiliary capacitor is connected to the third or fourth switch in parallel. | 10-03-2013 |
20140056045 | CONTROL CIRCUIT FOR POWER CONVERTER, CONVERSION SYSTEM AND CONTROLLING METHOD THEREOF - The disclosure provides a control circuit for a power converter, a conversion system and a controlling method thereof. The conversion system includes an AC power supply, a power converter and a control circuit. The power converter includes a first and second bridge arms connected in parallel. The first bridge arm includes a first and second switches connected in series. A second end of the first switch is connected with a first end of the second switch and coupled to a first end of the AC power supply by an inductance component. The first and second switches work at a first switching frequency. The control circuit is used for controlling the first and second switches, so that the current flowing through the inductance component is decreased to zero before the at least one first switching cycle is over. | 02-27-2014 |
20140092634 | MIXED CONTROL METHOD FOR RESONANT CONVERTER, RESONANT CONVERTER SYSTEM AND MIXED CONTROLLER - The present application provides a mixed control method for a resonant converter, a resonant converter system and a mixed controller. When the resonant converter operates in a case where a voltage gain is less than a predetermined value, the method includes: setting a mixed control start frequency, a mixed control stop frequency and a slope of a phase-shifting angle; detecting an operating frequency of the converter; calculating a time delay of phase shifting according to the slope, the mixed control start frequency, the mixed control stop frequency and a resonant frequency of the resonant converter; and according to the time delay, the mixed control start and stop frequencies, generating a control signal to adjust the operating frequency and the phase-shifting angle of the resonant converter. The present application can realize a relatively low voltage gain and a small circuit loss, thereby the circuit efficiency may be improved. | 04-03-2014 |
20140133200 | CLAMP SNUBBER CIRCUIT AND RESISTANCE ADJUSTMENT METHOD FOR THE SAME - A clamp snubber circuit for reducing a value of a peak voltage on a power switch of a power converter includes: a clamp switch; a clamp capacitor having a first terminal electrically coupled to the power switch via the clamp switch, and a second terminal electrically coupled to a ground; and at least one resistance adjustment circuit, each of which includes: a switch element having a first terminal electrically coupled to the first terminal of the clamp capacitor, a second terminal electrically coupled to the ground, and a control terminal; and a control circuit configured to receive a detection parameter of the power converter and compare the detection parameter with a preset parameter and output a control signal to the control terminal of the switch element to adjust a resistance value of the resistance adjustment circuit. Peak voltages applied on power switches may be clamped and absorbed more effectively. | 05-15-2014 |
20140146572 | POWER CONVERTER AND METHOD FOR BALANCING VOLTAGES ACROSS INPUT CAPACITORS - A power converter and a method for balancing voltages across input capacitors are disclosed in the present application. The power converter includes: two DC input terminals; a first input capacitor and a second input capacitor; a first bridge arm and a second bridge arm connected in series with one another; and an output circuit configured to generate a signal required by the power converter based on the signals at a midpoint of the first bridge arm and a midpoint of the second bridge arm. The power converter further includes: a first voltage balancing unit and a second balancing unit configured to reduce a voltage difference between the first input capacitor and the second input capacitor. The power converter provided by the present application solves the problem of imbalance in the voltages across the first input voltage and the second input voltage. | 05-29-2014 |
20140146573 | DC-DC CONVERTER AND METHOD FOR CONTROLLING THE SAME - The DC-DC converter includes a first bridge and a second bridge. The first bridge includes a first switch and a second switch, whereas the second bridge includes a third switch and a fourth switch. The second bridge is in parallel connection with the first bridge. The second switch is in series connection with the first switch, and the fourth switch is in series connection with the third switch. The DC-DC converter switches between a first mode and a second mode based on a detection signal. Further, a method for controlling the DC-DC converter is also disclosed herein. | 05-29-2014 |
20140334189 | BI-DIRECTIONAL DC-DC CONVERTER - The present disclosure discloses a bi-directional DC-DC converter, comprising a primary-side inverting/rectifying module, an isolated transformer, and a secondary-side rectifying/inverting module, wherein the primary-side inverting/rectifying module comprises a first bridge arm composed of a first switching component and a second switching component connected in series and a clamping circuit comprising a resonant inductor and a clamping bridge arm composed of a first semiconductor component and a second semiconductor component connected in series, and two terminals of the resonant inductor are respectively coupled to a common node of the first switching component and the second switching component and a common node of the first semiconductor component and the second semiconductor component. The present disclosure can improve transformer efficiency while achieving the soft switching of the switching components. | 11-13-2014 |
Patent application number | Description | Published |
20130271941 | CONVERTER POWER UNIT AND ITS BUS BARS - A converter power unit comprises: a heat sink; n power switch modules on the heat sink; a first group of laminated bus bars comprising a first and a second bus bar; a capacitor group comprising m capacitor; a second group of laminated bus bars comprising a third and a fourth bus bar, the first bus bar is connected with the third bus bar, the second bus bar is connected with the fourth bus bar; providing that vertical projection areas projected by an area occupied by the n power switch modules and projected by the capacitor group on a first plane perpendicular to an axial direction of the capacitor group are defined as a first and a second projection areas respectively, the first and the second projection area have an overlapped area. The present application can reduce the stray inductances in the commutating loop of the converter. | 10-17-2013 |
20140036453 | POWER ELECTRONIC DEVICE AND AN ALIGNMENT DEVICE FOR THE POWER MODULE - An alignment device for a power module of a power electronic device is provided, which may be used for aligning the power module while the power module being plugging to or from a rear mounting part of a cabinet of the power electronic device. The rear mounting part is disposed at an inner side of a back plate of the cabinet, the alignment device comprises a first connector disposed on the power module; guide rail units disposed on inner sides of a left side plate and a right side plate of the cabinet; a second connector disposed on the rear mounting part; and a guide device for limiting an offset of the power module moving along the guide rail unit. | 02-06-2014 |
20140063738 | HEAT-DISSIPATING TYPE OF POWER CONVERTER - A heat-dissipating type of power converter comprises a support unit, at least one power module, at least one pair of rails and at least one main air duct module corresponding to the at least one power module. The pair of rails are fixed to the support unit and parallel to each other. The power module comprises a mounting plate module, a power unit and a radiator. wherein the power unit is fixed to the radiator, and the mounting plate module and the radiator are fixedly connected to each other. the main air duct module is fixed to the support unit and provided between the pair of rails, a second opening is defined in a side of the main air duct module toward the power module. The power module is assembled with or disassembled from the main air duct module by sliding along the pair of rails. Wherein after the power module is assembled with the main air duct module, the radiator is plugged into the main air duct module through the second opening, the power unit is positioned outside the main air duct module, and the main air duct with a sealed sidewall is defined by the mounting plate module, the radiator and the main air duct module. | 03-06-2014 |
20140085782 | POWER ELECTRONIC DEVICE, POWER ELECTRONIC SYSTEM AND HOT PLUG METHOD FOR POWER UNIT - The disclosed is a power electronic device comprising a power unit and a mounting cubicle matching with the power unit. The mounting cubicle is provided with a rail and an entrance for pushing into and pulling out of the power unit. A side of the mounting cubicle is provided with an power source and control output terminal and a signal output terminal. A side of the power unit is provided with a power source and control input terminal and a signal input terminal. The power unit is provided with a micro-switch. When the power unit moves along the rail, after the power source and control input terminal contacts with the power source and control output terminal. The signal input terminal becomes electrically connected with the signal output terminal, and the micro-switch is turned on so as to start the power unit. | 03-27-2014 |
Patent application number | Description | Published |
20090152569 | LED MODULE WITH REDUCED OPERATING TEMPERATURE - The present invention relates to a LED module with a reduced operating temperature. The LED module includes a substrate, a plurality of LED chips, a carrier and an encapsulant layer. These LED chips are disposed on the substrate and electrically connected to the substrate and are divided into a first LED chip set and a second LED chip set. The carrier is coupled to the substrate and has a driving circuit. The driving circuit is electrically connected to the plurality of LED chips for driving operations of the plurality of LED chips. The first LED chip set and the second LED chip set emit light in an alternate lighting manner or in a combined simultaneous/alternate lighting manner so as to reduce the operating temperature of the LED module. The encapsulant layer covers the plurality of LED chips, the substrate and the carrier having the driving circuit. | 06-18-2009 |
20090153076 | DRIVING CIRCUIT AND METHOD FOR REDUCING OPERATING TEMPERATURE OF LED PACKAGE - The present invention relates to a driving circuit for driving one or multiple LED chip sets. The driving circuit includes a power converting circuit, one or multiple switching elements, and a controller. The power converting circuit is electrically connected to the one or multiple LED chip sets for receiving an input power and converting the input power into a regulated output voltage or current required for illuminating the one or multiple LED chip sets. The one or multiple switching elements electrically connected to the one or multiple LED chip sets. The controller is electrically connected to the switching elements for controlling alternate or combined simultaneous/alternate switching on/off statuses of the one or multiple switching elements, so that the one or multiple LED chip sets emit light in an alternate lighting manner or a combined simultaneous/alternate lighting manner to reduce the operating temperatures of the one or multiple LED chip sets. | 06-18-2009 |
20090195169 | POWER SUPPLY CIRCUIT WITH CURRENT SHARING FOR DRIVING MULTIPLE SETS OF DC LOADS - The present invention provides a power supply circuit for driving multiple sets of DC loads. The power supply circuit includes a current providing circuit, a sharing circuit and a current control unit. The current providing circuit receives and regulates a supply voltage into specified output currents to be supplied to the multiple sets of DC loads. The sharing circuit is connected in series with output terminals of the current providing circuit and the multiple sets of DC loads. The sharing circuit includes at least one coupling inductor member for performing equal current sharing among the multiple sets of DC loads. The current control unit is connected to the current providing circuit and the multiple sets of DC loads for detecting magnitudes of the current passing through the multiple sets of DC loads and controlling the output currents from the current providing circuit. | 08-06-2009 |
20090315480 | BRIGHTNESS-ADJUSTABLE LED DRIVING CIRCUIT - A brightness-adjustable LED driving circuit includes a rectifying and filtering circuit, a power factor correction power conversion circuit, and a detecting and controlling circuit. The rectifying and filtering circuit is used for filtering and rectifying a brightness adjusting voltage into a first DC voltage. The power factor correction power conversion circuit is electrically connected to the rectifying and filtering circuit and at least one LED string for generating an output current required for powering the at least one LED string. The detecting and controlling circuit detects phase data of the brightness adjusting voltage and the output current generated by the power factor correction power conversion circuit. The detecting and controlling circuit generates a control signal to the power factor correction controller according to the phase data of the brightness adjusting voltage, so that the magnitude of the output current is changed according to the phase data of the brightness adjusting voltage. | 12-24-2009 |
20100001661 | LED CURRENT-SUPPLYING CIRCUIT AND LED CURRENT-CONTROLLING CIRCUIT - A LED current-controlling circuit includes a first magnetic amplifier, a first current detecting circuit, a first magnetic amplifier controller and a first diode. The first magnetic amplifier is connected to an input terminal of the LED current-controlling circuit and the first LED string. The first current detecting circuit is connected to the first LED string in series for detecting the first current flowing through the first LED string. The first magnetic amplifier controller is used for controlling on/off statuses of the first magnetic amplifier. The first diode is connected to an output terminal of the first magnetic amplifier, the first LED string and the first magnetic amplifier controller. The first magnetic amplifier controller controls on/off statuses of the first magnetic amplifier according to the magnitude of the first current, thereby maintaining the first current at a specified DC current level. | 01-07-2010 |
20100320937 | POWER SUPPLY CIRCUIT FOR POWERING LIGHT EMITTING DIODE - A power supply circuit for receiving an input voltage and outputting a driving voltage to at least one LED string. The power supply circuit includes a rear-stage converting circuit and a control circuit. The rear-stage converting circuit is used for receiving the input voltage and converting the input voltage into a compensating voltage. The control circuit is connected to the rear-stage converting circuit and the LED string for detecting the magnitude of a current passing through the LED string, thereby controlling the current passing through the LED string to be identical. The driving voltage is outputted from the power supply circuit. The driving voltage is a summation of the input voltage and the compensating voltage. | 12-23-2010 |
20120062146 | LAMP DRIVING DEVICE - A lamp driving device is provided for driving plural lamps. The lamp driving device includes a power conversion circuit and plural lamp connectors. The power conversion circuit is capable of converting an input voltage into a first DC voltage, and outputting a first current having a constant current value. The plural lamp connectors are serially connected with each other, and have respective positive terminals and respective negative terminals connected with corresponding lamps, thereby outputting respective output voltages and respective output currents to corresponding lamps. The first DC voltage is subject to voltage-division to obtain the output voltages, and the magnitudes of the output voltages from the lamps are substantially identical. | 03-15-2012 |
20130057152 | LED LIGHTING SYSTEM - Provided is a LED lighting system, including a lighting device driver having a power converter for converting an input voltage into a first DC voltage and outputting a first current having a substantially constant current value; and a LED lighting device assembly connected to the lighting device driver through two contacts. The LED lighting device assembly includes a plurality of light-emitting diode lighting devices having a plurality of lighting device connection bases and a plurality of LED units. The lighting device connection bases are connected in series with each other to allow the LED lighting devices to be connected in series with each other, and the lamp voltage is applied across the positive terminal and the negative terminal of the lighting device connection base and is generated by dividing the first DC voltage, thereby allowing the lamp currents outputted by the lighting device connection bases are substantially equal. | 03-07-2013 |
20130271007 | DRIVING DEVICE FOR LIGHTING FIXTURE - Disclosed is a driving device for driving a plurality of lighting fixtures, including a power converter for converting an input voltage into a DC output voltage; a plurality of lighting fixture bases connected in series with each other and each connected to a corresponding lighting fixture for outputting an operating voltage and an operating current to the lighting fixture. The operating voltage is derived by dividing the DC output voltage, and each operating current is identical with each other. The driving device further includes a plurality of output protection circuits respectively connected in parallel with a lighting fixture base for selectively bypass the lighting fixture base to stop the lighting fixture base from outputting current, and a control circuit connected to the output protection circuits for manipulating the output protection circuit to bypass the lighting fixture bases, thereby regulating the number of the lighting fixtures that illuminate. | 10-17-2013 |