Entries |
Document | Title | Date |
20080205092 | INVERTER AND PROGRAMMING DEVICE THEREOF - It is possible to easily and rapidly develop an inverter application while maintaining stable quality. Executable code modules which have been sufficiently tested are installed in an inverter. An application source code is created on a programming device by using function blocks corresponding to the executable code modules and connection lines for connecting the function blocks. The source code is complied to create a connection information table for selecting the executable code modules and specifying their execution order. The connection information table is downloaded to the inverter via communication to execute the application. | 08-28-2008 |
20090091954 | POWER CONVERTER AND POWER CONVERSION METHOD - This invention provides a power converter and a power conversion method that can reduce distortions of an output voltage and an output current, can simply a calculation processing, and is inexpensive and has a high performance even when a PWM pulse gets narrow. In a power converter for connecting each phase of an AC power supply to each phase on an output side through a bidirectional switch and converting an AC source voltage by PWM, the power converter includes a one-phase fixing switching mode and a full phase switching mode, and a mode switching section for switching from the full phase switching mode to the one-phase fixing switching mode. Moreover, the power converter includes a vector component calculator ( | 04-09-2009 |
20090097282 | Frequency Converting Apparatus And Control Method For The Apparatus - A power converting apparatus and method includes a converter for converting AC power from a commercial power supply into DC power, a smoothing unit for smoothing the DC power from the converter, an inverter for converting an output of the smoothing unit into another AC power, a control unit for controlling the inverter, and a current detector for detecting an output current of the inverter and providing a detection signal indicative thereof. A cooling device for cooling at least one of the converter or the inverter. The detection signal of the current detector is inputted into the control unit so that the control unit estimates a temperature of the inverter or the converter based on the detection signal and controls a cooling device for cooling based on the estimated temperature. | 04-16-2009 |
20090109713 | Variable speed drive - Systems and methods for improved Variable Speed Drives are provided. One embodiment relates to apparatus for common mode and differential mode filtering for motor or compressor bearing protection when operating with Variable Speed Drives, including conducted EMI/RFI input power mains mitigation. Another embodiment relates to a method to extend the synchronous operation of an Active Converter to the AC mains voltage during complete line dropout. Another embodiment relates to an Active Converter-based Variable Speed Drive system with Improved Full Speed Efficiency. Another embodiment relates to a liquid- or refrigerant-cooled inductor. The liquid- or refrigerant-cooled inductor may be used in any application where liquid or refrigerant cooling is available and a reduction in size and weight of a magnetic component is desired. | 04-30-2009 |
20090135629 | Universal Irrigation Controller Power Supply - Described herein are systems, methods and apparatuses for providing power to an irrigation controller. In one implementation, an apparatus comprises an alternating current (AC) to direct current (DC) voltage converter configured to convert an input AC voltage into a DC voltage. An AC voltage generator is coupled to the AC to DC voltage converter, wherein the AC voltage generator is configured to generate an output AC voltage using the DC voltage. The AC voltage generator is further coupled to the irrigation controller, and the AC voltage generator is configured to supply the output AC voltage to the irrigation controller. | 05-28-2009 |
20090168467 | CIRCUIT ARRANGEMENT HAVING A DUAL COIL FOR PRODUCING AN ALTERNATING VOLTAGE OR AN ALTERNATING CURRENT - The invention relates to a circuit arrangement for producing an alternating voltage or an alternating current from a unipolar direct current source having an inverter relating to a neutral conductor. The direct current source is connected to an inverter which converts the unipolar voltage of the direct current source into a bipolar intermediate circuit voltage that is stored in a buffer circuit (C | 07-02-2009 |
20090244935 | INVERTER APPARATUS WITH ADAPTABLE VOLTAGE-TO-FREQUENCY CONTROL - An inverter apparatus has an adaptable high-resolution voltage-to-frequency (V/f) control. The inverter apparatus receives an analog input signal and includes a first circuit, a second circuit, a third circuit, and a micro-controller unit. The first circuit processes a small-signal portion of the analog input signal with a larger voltage gain. The second and the third circuit both processes large-signal portions of the analog input signal with smaller voltage gains respectively. The three processed analog input signals of the first, the second, and the third circuits are converted into three digital output values respectively. The largest digital output value is selected by the micro-controller unit and supplied to a frequency operation unit for generating a corresponding output frequency. | 10-01-2009 |
20100118568 | Low-Voltage Harmonic Filter for Full-Scale Converter Systems - The present invention relates to a wind turbine facility comprising a power generator operationally connected to an AC/AC converter adapted to receive variable frequency AC-power from the power generator, and adapted to generate substantially fixed frequency AC-power. The wind turbine facility further comprises a harmonic filter system, and a grid transformer comprising a primary winding being operationally connected to the AC/AC converter, and a secondary winding adapted to be operationally connected to an associated, substantially fixed frequency AC-power supply grid. The grid transformer further comprises a tertiary winding being operationally connected to the harmonic filter in order to suppress unwanted harmonics, such as selected harmonics generated by the AC/AC converter. The turn ratio between the primary and tertiary windings is selected in such a manner that a voltage of the tertiary winding is lower than a nominal voltage level of the associated AC-power supply grid voltage. | 05-13-2010 |
20100118569 | POWER CONVERSION SYSTEM - A power conversion system includes a first power converter converting AC to DC, a second power converter converting DC to AC, a current detector detecting output current of the second power converter, a pulsation detector detecting a pulsating component associated with the AC to DC conversion of the first power converter from a pulsating component contained in at least any one of effective power, power, and apparent power of the second power converter, a voltage corrector outputting a correction amount correcting at least one of phase, frequency, and amplitude of a voltage output from the second power converter based on the pulsating component from the pulsation detector, and a voltage controller outputting a voltage instruction to be output from the second power converter based on the correction amount from the voltage corrector, wherein the second power converter converts DC to AC based on the voltage instruction from the voltage controller. | 05-13-2010 |
20100128502 | ELECTRIC POWER CONVERSION APPARATUS - A power converter includes: a converter ( | 05-27-2010 |
20100182809 | Apparatus, Systems, and Methods for Controlling Energy Converting Devices - In one aspect the invention relates to an electrical circuit for use with a generator having an output port, the circuit to modify one of an electric current or voltage from the generator. The circuit includes a rectifier to convert the alternating current from the generator to direct current, the rectifier having a first port and a second port, the rectifier first port in communication with the output port of the generator; and a direct current to alternating current inverter to convert the direct current from the rectifier to alternating current, the inverter having a first port and a second port, the first port of the inverter in communication with the second port of the rectifier. In one embodiment, the generator is a linear alternator positioned within an energy converting apparatus comprising a Stirling engine having a piston such that motion of the piston drives the linear alternator. | 07-22-2010 |
20100188875 | High Voltage and Frequency Distributed Power System - A switching power supply transmits power between a single front end including electromagnetic interference filtering and power factor correction circuits to an output end at a high voltage and high frequency from which any desired DC voltage or waveform may be readily and directly derived with high efficiency in order to reduce size and weight of components including transformers at the output end and allow greater variety of connection wiring of reduced weight and volume to be used. The high frequency is limited at the low frequency end by the frequency at which significant power can be transferred through, for example, a ferrite core or other transformer of sufficiently low volume to accommodate closely spaced loads or power converters and at the high frequency end by the wavelength in the connection wiring such that 1/10 wavelength is greater than one thousand feet. Branches of the power distribution system which are not desired to be in use can be operated at zero power and be brought back on line within milliseconds, when needed. Power distribution among respective branches of the power distribution system can be controlled by varying the high frequency of power transmission and appropriate filtering. | 07-29-2010 |
20110038185 | Low stress soft charge circuit for diode front end variable frequency drive - A variable frequency drive comprises a diode rectifier receiving multiphase AC power from a source and converting the AC power to DC power. An inverter receives DC power and converts the DC power to AC power to drive a load. A link circuit is connected between the diode rectifier and the inverter and comprises a DC bus to provide a relatively fixed DC voltage for the inverter. A bus capacitor is across the bus. A soft charge circuit limits inrush current to the bus capacitor. The soft charge circuit comprises an inductor connected between the source and the link circuit and a switch circuit in the link circuit for selectively providing a semiconverter configuration or a full bridge converter configuration to provide two stage charging of the bus capacitor. | 02-17-2011 |
20110090719 | RF ISOLATION FOR POWER CIRCUITRY - System and method for providing isolated power to a component that is also subject a set of RF signals that includes at least a first RF signal having a first RF frequency is provided. There is included providing a DC voltage signal and modulating the DC voltage signal into an isolated power signal using an isolation transformer. The isolated power signal has an intermediate frequency that is higher than 60 Hz and lower than the first RF frequency. There is included supplying the DC voltage signal to the primary winding and obtaining the isolated power signal from the secondary winding; and delivering the isolated power to the component using the isolated power signal. | 04-21-2011 |
20110141772 | Resonance Power Generator - A resonance power generator is provided. The resonance power generator includes an alternating current/direct current (AC/DC) rectifier to rectify an input signal of an alternating voltage and an AC generator to generate an AC signal based on the rectified signal that is output from the AC/DC rectifier. The resonance power generator may also include, for example, a control unit to control a frequency of the AC signal, a filter unit to remove a spurious signal or a harmonic element included in the AC signal, a voltage/current amplifier to amplify the AC signal, and a source resonator to transmit a power to a target resonator. | 06-16-2011 |
20110149617 | AC/AC CONVERSION POWER SUPPLY DEVICE - Provided is an AC/AC conversion power supply device including: n(n≧2) rectification circuits (D | 06-23-2011 |
20110176340 | POWER CONVERTER, CONTROL METHOD THEREOF, AND DIRECT MATRIX CONVERTER - A voltage control rate of an inverter has a DC component and an AC component. This AC component has a frequency which is six times a fundamental frequency of an AC voltage outputted by the inverter. Even when there are not only a fifth-order harmonic component but also a seventh-order harmonic component of a load current, a ratio between the magnitude of the AC component and the DC component can be appropriately set. | 07-21-2011 |
20110299307 | UNINTERRUPTIBLE POWER SUPPLY APPARATUS - An uninterruptible power supply apparatus includes a cooler cooling a converter/chopper circuit and a cooler cooling a PWM inverter. The converter/chopper circuit and the cooler make up one integrated unit. Accordingly, a smaller apparatus can be achieved, compared with a conventional apparatus in which a cooler is provided for each of a converter and a chopper. | 12-08-2011 |
20110305049 | PHASE-CONTROLLED UNINTERRUPTIBLE POWER SUPPLY - A phase-controlled power supply is disclosed. The power supply includes a power conditioner with an input configured to connect to an external source of electrical power, the power conditioner being configured to provide conditioned power on its output. The power supply also includes a transformer having a primary winding and a secondary winding, and a switching module coupled between the output of the power conditioner and to the primary winding of the transformer. The switching module has two modes of operation and a control signal input configured to accept a first control signal. The switching module includes a switching element configured to connect the power conditioner output to the primary winding of the transformer. The switching module operates in the first mode when the first control signal is in a first state, switching the first switching element at a first frequency and first duty cycle. The switching module operates in the second mode when the first control signal is in a second state, switching the first switching element at a frequency and duty cycle according to the first control signal. | 12-15-2011 |
20110310640 | kind of LLC resonant converter for full voltage range and its control method - This invention relates to a kind of LLC resonant converter for full input voltage range and its control method, and belongs to LLC resonant power conversion field. | 12-22-2011 |
20120063176 | POWER CONVERTING DEVICE FOR VEHICLE - A control device for a vehicle, the control device including, in a housing that is installed under a floor of the vehicle: a power converter configured of a semiconductor switching circuit; a control unit that controls the output of the power converter so as to supply a required load to a power; a wiring that is connected to the power converter; a voltage detector that detects a voltage applied to the wiring and outputs the detected voltage to the control unit; and a shielding unit that shields radiation noise from the wiring to the voltage detector, wherein the control unit is disposed on a first side of the housing along a traveling direction of the vehicle, the power converter is disposed on a second side of the housing along the traveling direction of the vehicle and the voltage detector is disposed between the power converter and the control unit. | 03-15-2012 |
20120092903 | POWER TRANSFER BETWEEN INDEPENDENT POWER PORTS UTILIZING A SINGLE TRANSFORMER - An example power delivery network includes an energy transfer element, a main power port, and a main port interface. The energy transfer element includes multiple windings, where a first power converter transfers power between a first power port and a first winding, and a second power converter transfers power between a second winding and a second power port. The main port interface is coupled cyclically reverse a dc voltage received at the main power port and provides a cyclically reversed voltage to a third winding of the energy transfer element at a fixed duty ratio, where the transfer of power between the first power port and the first winding is independent of the transfer of power between the second winding and the second power port. Also, the main power port has an effective impedance less than an effective impedance of the first power port and the second power port. | 04-19-2012 |
20120113691 | POWER CONVERTER WITH CONTROLLED CURRENT SOURCE - A power converter including a rectifier stage connected to plural phases of a network delivering an input current at a determined fundamental frequency, a DC power supply bus and a bus capacitor connected to the DC power supply bus. The converter includes a controlled current source situated on the DC power supply bus, the current source making it possible to control a rectifier current, flowing on the DC power supply bus, and a controller for the controlled current source to control a rectifier current, flowing on the DC power supply bus. The controller is configured to implement a regulation loop into which are injected a first harmonic and a second harmonic synchronized respectively at six times and twelve times the fundamental frequency of the input current delivered by the network, the amplitude and phase of these harmonics being determined to limit the THDi and the PWHD. | 05-10-2012 |
20120127763 | ELECTRIC POWER SUPPLY SYSTEM COMPRISING POWER MODULES COUPLED IN PARALLEL - The present invention relates to an electric power supply system comprising at least two power modules coupled in parallel and comprising a first power module comprising a first control means adapted to control the operation of at least the first power module, and a second power module comprising a second control means adapted to control the operation of at least the second power module and wherein the power modules are configured to operate in a manner coordinated with other power modules, the operation of each power module including switching the power module on and/or off if demand so requires. The present invention further relates to a method for carrying out the present invention. | 05-24-2012 |
20120155125 | WIND TURBINE GENERATOR - A wind turbine generator comprising: an electrical generator configured to generate AC signals, a plurality of power converters operated by a gating signal, each power converter configured to convert the AC signals from electrical generator into fixed frequency AC signals, a transducer configured to measure the combined output from the power converters, and a controller configured to phase-displace the gating signal of one of the power converters to substantially minimise harmonic components of the combined output. | 06-21-2012 |
20120170331 | APPARATUS AND METHOD OF POWER CONTROL - The present disclosure is related to a power control apparatus and a method for controlling power, more specifically to a power control apparatus that controls the risk of overcurrent in a power generator when the voltage in the power grid is low. In accordance with an embodiment of the present disclosure, a power control apparatus that controls power in a power generation system including a generator generating power can include a current comparator, which calculates an error current by using a difference between a current measured at the generator and a rated current of the generator, a controlling unit, which calculates a real power value by receiving the error current and outputs a switch driving signal corresponding to the calculated real power value, a switch, which is operated by the switch driving signal, and a resistance device, which is coupled to the switch to consume the error current. | 07-05-2012 |
20120250370 | HIGH FREQUENCY POWER SUPPLY DEVICE - There is provided a high frequency power supply device. The power control unit comprises an impedance adjuster that includes a variable reactance element and adjusts a load side impedance by changing a reactance value of the variable reactance element, and an impedance control unit that controls the variable reactance element of the impedance adjuster in response to a power value detected by a power detection unit so as to perform control of approximating the power value of the high frequency power, which is fed from the high frequency power generation unit to the load, to the setting value or control of maintaining the power value within the set allowable range by changing a resistance of the load side impedance in response to the power value detected by the power detection unit. | 10-04-2012 |
20120257424 | Limiting Peak Electrical Power Drawn by Mining Excavators - The maximum electrical power drawn from an electrical power source by a mining excavator comprising electric motors is reduced by supplying supplementary electrical power from an electrical energy storage unit. The input electrical power drawn by the mining excavator is cyclic. An upper limit is set for the electrical power drawn from the electrical power source. When the input electrical power drawn by the mining excavator exceeds the upper limit, electrical power is supplied by the electrical energy storage unit, such as an ultracapacitor bank. The ultracapacitor bank may be charged by the electrical power source during off-peak intervals. Electrical power generated by electrical motors operating in a regeneration interval may also be recaptured and stored in the electrical energy storage unit. | 10-11-2012 |
20120300509 | POWER SUPPLY SYSTEM AND METHOD WITH ELECTRONIC HIGH-VOLTAGE TRANSFORMER - A power supply system with an electronic high-voltage transformer includes an input module for receiving a current and eliminating disturbance in the current, a transformer module for transforming the received current into a low-voltage direct current, a power supply module for transforming the low-voltage direct current into a high-frequency alternating current, and a magnetic processing module comprising one or more magnetic elements and one or more high-voltage resistant wires connecting with the magnetic elements so as to transform the high-frequency alternating current into a high-voltage alternating current. In accordance with the above power supply system and method with an electronic high-voltage transformer, the magnetic elements and the high-voltage resistant wires connected to the magnetic elements have a simple structure, easily extract electricity and effectively output power stage by stage so as to supply a high-power energy in a high-voltage state and thus achieve a purpose of isolation from a high voltage. | 11-29-2012 |
20130016536 | Device and Method for Global Maximum Power Point Tracking - A device, system, and method for global maximum power point tracking comprises monitoring an output power of a DC power source while executing a maximum power point tracking algorithm and adjusting a maximum power point tracking command signal in response to the output power being less than a reference output power. The command signal is adjusted until the output power exceeds a previous output power by a reference amount. The command signal may be a voltage command signal, a current command signal, an impedance command signal, a duty ratio command signal, or the like. | 01-17-2013 |
20130016537 | METHOD FOR CONTROLLING A FREQUENCY CONVERTER AND FREQUENCY CONVERTERAANM DENG; HENGAACI BrandeAACO DKAAGP DENG; HENG Brande DK - A method for controlling a frequency converter is provided. The converter includes a rectifier, an inverter which is connected via a DC link to the rectifier, a rectifier controller and an inverter controller. A minimal rectifier DC link voltage for the rectifier controller is determined, a minimal inverter DC link voltage for the inverter controller is determined, a minimal DC link voltage as the maximum of the minimal rectifier DC link voltage and the minimal inverter DC link voltage is determined, and an optimal DC link voltage reference based on the minimum of the minimal DC link voltage and a maximal allowed DC link voltage is determined. The rectifier controller and/or the inverter controller is/are controlled based upon the optimal DC link voltage reference. | 01-17-2013 |
20130027992 | METHOD FOR INPUTTING POWER AND POWER INPUT SYSTEM - The invention relates to a method for inputting power into a multiphase alternating current grid by means of a transformer which is electrically interconnected between the alternating current grid and a number of input phases corresponding to the number of grid phases of the grid, wherein at least one voltage characteristic of one of the grid phases is determined, and an input of reactive currents occurs as a function of a previously determined deviation of the voltage characteristic of the at least one grid phase relative to a corresponding target voltage characteristic. It is provided that the deviation of each one of the voltage characteristics is determined, and the input of the reactive currents in case of deviations that are asymmetrical with respect to the symmetry of the target voltage characteristics is an asymmetrical input of the reactive current with respect to the respective input at the input phases. | 01-31-2013 |
20130033906 | Apparatus And Method For Providing An Alternating Current - A system for providing, from a direct current (DC) voltage source, an alternating current (AC) to an electrical grid outputting a grid voltage, the system including: a transformer for coupling to the DC voltage source through a first switch controlled by a first control signal, and configured to provide a converted voltage based on a DC voltage; a rectifier coupled to the transformer, and configured to generate an envelope voltage of the converted voltage; a plurality of switches coupled to the rectifier to receive the generated envelope voltage of the converted voltage, the plurality of switches being controlled by a plurality of control signals, respectively, and configured to generate the AC from the generated envelope voltage of the converted voltage; and control apparatus coupled to the first switch and the plurality of switches, and configured to provide, based on the grid voltage, the first control signal and the plurality of control signals. | 02-07-2013 |
20130107586 | SYSTEM FOR IMPROVED WIND TURBINE GENERATOR PERFORMANCE | 05-02-2013 |
20130128628 | POWER SYSTEM CONTROLLING AND MONITORING POWER SEMICONDUCTOR DEVICES EMPLOYING TWO SERIAL SIGNALS - A power system includes a power semiconductor devices; a control circuit outputting first firing signals each being for a corresponding power semiconductor device, and outputting first activation response signals each being associated with a corresponding power semiconductor device. A first interface circuit cooperates with the control circuit to input a first serial signal and output the first firing signals, and to input the first activation response signals and output a second serial signal. A second interface circuit cooperates with a controller to input the second serial signal, to output to the controller second activation response signals corresponding to the first activation response signals, to input from the controller second firing signals corresponding to the first firing signals, and to output the first serial signal. The controller controls the power semiconductor devices with the second firing signals, and monitors the power semiconductor devices with the second activation response signals. | 05-23-2013 |
20130163292 | MID-POINT VOLTAGE CONTROL - A midpoint voltage control system includes a power source, a generator coupled to the power source, a midpoint voltage controller coupled to the back-to-back converter configuration, a generator converter controller coupled to the midpoint power controller, a grid converter controller coupled to midpoint power controller, a first voltage converter coupled to the generator converter controller, the midpoint power controller and the generator, a second voltage converter coupled to the grid converter controller the midpoint power controller, the second voltage converter having a capacitor bank direct current (DC) bus midpoint and a transformer coupled to the second voltage converter and having a grid neutral midpoint, wherein the capacitor midpoint is interconnected to the grid neutral midpoint. | 06-27-2013 |
20130170254 | CONTROL CIRCUIT AND METHOD FOR CONVERTERS OF WIND TURBINES - Controlling a converter of a wind turbine is disclosed. The converter is connected to a rotor of a doubly fed asynchronous generator in order to feed electrical energy into an electric network. The converter comprises a network-side inverter, a generator-side inverter, and a controller, which outputs target values for demanded reactive power to at least one of the inverters. A reactive power target signal is determined for the portion that the network-side inverter contributes to the demanded reactive power Q | 07-04-2013 |
20130182465 | WIND POWER CONVERTER STRUCTURE AND WIND POWER GENERATION SYSTEM INCLUDING THE SAME - A wind power converter structure and a wind power generation system including the converter structure are provided. The converter structure comprises a plurality of generator-side converters arranged in a nacelle located on a top part of the tower; a plurality of grid-side converters arranged on a bottom part of the tower or outside the tower, wherein a DC input side of the grid-side converter is coupled to a DC output side of the generator-side converter; at least one DC bus connected between the generator-side converter and the grid-side converter; and an isolation transformer of which a primary side is coupled to the AC output side of the grid-side converter, wherein a secondary side of the isolation transformer is coupled to a power grid. | 07-18-2013 |
20130182466 | EXCITATION CONTROL CIRCUIT AND ELECTRICALLY EXCITED WIND POWER SYSTEM HAVING THE SAME - The present invention provides an excitation control circuit and the electrically excited wind power system having the same. The excitation control circuit includes a plurality of full-power converters, each of which has a generator-side converter and a grid-side converter; a DC excitation module including a plurality of DC-DC converters; and a control module, controlling or switching any DC-DC converter working normally, and controlling excitation switch turning ON or turning OFF. | 07-18-2013 |
20130188402 | Subsea DC Transmission System - A subsea electrical power transmission system may include a rectifier located at the source of the energy feeding a subsea DC power transmission path, e.g. a transmission cable with DC power. The voltage level can be adjusted to the actual installation and may typically be 100 kV. To reduce the voltage at the destination a step down chopper is used in one embodiment. This may reduce the voltage to a suitable input voltage for a VSD-inverters (VSD: variable speed drive) feeding electrical consumers such as motors. | 07-25-2013 |
20130215651 | Isolated Power Converter Circuit and Control Method Thereof - The present invention discloses an isolated power converter circuit and a control method thereof. The isolated power converter circuit includes: a transformer circuit, a power switch circuit, an opto-coupler circuit, and a control circuit. The transformer circuit includes a first winding and a second winding. The power switch circuit is coupled to the transformer circuit to control it according to a driving signal. The opto-coupler circuit generates a feedback signal. The control circuit is coupled to the power switch circuit and the opto-coupler circuit, for generating the driving signal according to the feedback signal. The control circuit includes a distinguishing circuit for distinguishing a status of the feedback signal. | 08-22-2013 |
20130223110 | POWER CONVERSION SYSTEM AND ASSOCIATED METHOD - It allows connecting or disconnecting polyphase conversion stages ( | 08-29-2013 |
20130308351 | HIGH VOLTAGE INDUCTOR FILTER APPARATUS AND METHOD OF USE THEREOF - The invention comprises a high frequency inductor filter apparatus coupled with an inverter yielding high frequency harmonics and/or non-sixty Hertz output. For example, an inductor/converter apparatus is provided that uses a silicon carbide transistor to output power having a carrier frequency, modulated by a fundamental frequency, and a set of harmonic frequencies. A filter, comprising an inductor having a distributed gap core material and optional magnet wires, receives power output from the inverter/converter and processes the power by passing the fundamental frequency while reducing amplitude of the harmonic frequencies. | 11-21-2013 |
20140022827 | DRIVE TRAIN COMPRISING A DOUBLY-FED ELECTRIC MACHINE AND AN INVERTER CONTROLLED ACCORDING TO A LAW LIMITING THE DELIVERED ACTIVE POWER - A drive train comprising an electric machine including a rotor and a stator, the stator being connected to an alternating grid and having a stator frequency, and a bidirectional system for converting an alternating current into another alternating current. The conversion system is connected between the grid and the rotor, and comprises an AC-DC converter connected to the grid, an inverter connected between the AC-DC converter and the rotor, and a device for controlling switches of the inverter according to a control law. The control law is such that the active power exchanged by the inverter with the rotor is essentially always lower than 0.3 times the nominal power of the direct current specifically circulating between the AC-DC converter and the inverter, for the frequencies of a target interval of between 0.6 times the stator frequency and 1.4 times the stator frequency. | 01-23-2014 |
20140036553 | DRIVE TRAIN COMPRISING A DOUBLY FED ELECTRIC MACHINE AND A BAND STOP FILTER CONNECTED BETWEEN AN INVERTER AND THE ROTOR OF THE MACHINE - A drive train comprising an electric machine including a rotor and a stator, the stator being electrically connected to an alternating grid and having a stator frequency, and a bidirectional system for converting an alternating current into another alternating current. The conversion system is connected between the grid and the rotor, and comprises an ac/dc converter connected to the network, and an inverter connected between the ac/dc converter and the rotor, the inverter and the rotor being interconnected at an intermediate point for each phase of the alternating voltage. The drive train comprises a band-stop filter for a target interval of between 0.6 times the stator frequency and 1.4 times the stator frequency, said band-stop filter being connected between the intermediate points and attenuating the voltage at the intermediate point for the frequencies of the target interval. | 02-06-2014 |
20140092649 | CONTACTLESS INDUCTIVELY COUPLED POWER TRANSFER SYSTEM - A contactless inductively coupled power transfer system includes a power supply device and a power receiving device. The power supply device includes a primary winding for generating an electromagnetic field (EMF) in response to an AC current flow having an operating frequency. The power receiving device includes a resonant circuit outputting an output voltage to a load and including a secondary winding and a reactance element. The reactance element is capable of forming a parallel resonant LC circuit with the secondary winding that resonates at the operating frequency, and forming a series resonant LC circuit that resonates at the operating frequency, and that is to be connected in series to the load. | 04-03-2014 |
20140140110 | Switch Mode Power Supply and Method for Operating the Switch Mode Power Supply - A switch mode power supply and method for operating the power supply and to the use of the same, wherein the switch mode power supply comprises a control for controlling a control element and is connected to a DC link of the converter, the switch mode power supply comprises a startup-delay such that control of the switch element is blocked until a predetermined start delay duration (T) has lapsed, where the start delay duration (T) is longer than the time span between DC link charging. | 05-22-2014 |
20140204629 | ACPOWER PUPPLY POWER CIRCUIT - An AC power supply power circuit comprises a power input unit connected to a DC/AC converter. The AC/DC converter is connected to a DC/DC circuit, and the DC/DC circuit is further connected to an adjustable DC voltage regulation circuit. The adjustable DC voltage regulation circuit is connected to an amplifier to amplify and convert the DC voltages into the AC voltages, thereby outputting different AC voltages and electric currents under the condition of not switching off the power supply and attaining not to stop outputting when adjusting the voltage via cross position, so that a power level is switched promptly and a distortion thereof is very low. | 07-24-2014 |
20140233276 | POWER CONVERTER CONTROL METHOD - When an AC voltage is outputted to an inductive load, pulsation of an effective power caused by an odd number-th order harmonic component of a current flowing in this load is reduced. A modulation factor k of an inverter | 08-21-2014 |
20140254216 | METHOD AND APPARATUS FOR FEEDING ELECTRICAL CURRENT INTO AN ELECTRICAL POWER SUPPLY SYSTEM - The invention relates to a method for feeding electrical current into an electrical, three-phase power supply system having a first phase, a second phase and a third phase with a first voltage, a second voltage and a third voltage at a power supply system frequency, comprising the steps of: measuring the first, second and third voltages, transforming the first, second and third voltages into a positive phase-sequence voltage system and a negative phase-sequence voltage system according to the method of symmetrical components, calculating a first desired current, a second desired current and a third desired current for feeding into the first, second and third phases of the power supply system, wherein the first, second and third desired currents are calculated on the basis of at least one value of the positive phase-sequence voltage system and/or the negative phase-sequence voltage system. | 09-11-2014 |
20140307487 | Full Bridge Oscillation Resonance High Power Factor Invertor - A full bridge oscillation resonance high power factor invertor being connected between a power source and a Load has a first inductor and a second inductor. The first and second inductors are respectively connected to a full bridge inverting circuit. The full bridge inverting circuit is connected parallelly to an energy storing capacitor. The present invention integrals conventional multiple stages invertor/convertors as a signal stage which is low cost and provides a very high transforming efficiency. The two inductors share current Loaded of the invertor, the invertor is able to provide a high power transforming performance. Switches of the full bridge inverting circuit all switch under zero voltage to reduce switching loss of the full bridge inverting circuit. | 10-16-2014 |
20140347896 | DC LINK MODULE FOR REDUCING DC LINK CAPACITANCE - A dc link module for a power circuit includes a first connector for connecting to a first power conversion circuit, a second connector for connecting to a second power conversion circuit, wherein the second power conversion circuit is connected to a load circuit arranged to at least intermittently operate as a power source to the power circuit, at least one dc link capacitors arranged between said first connector and said second connector for processing a voltage signal received at said first connector or said second connector, and at least one voltage compensation circuits arranged between said first connector and said second connector, said one or more voltage compensation circuits arranged to generate a voltage signal | 11-27-2014 |
20140362617 | VECTOR CONTROL OF GRID-CONNECTED POWER ELECTRONIC CONVERTER USING ARTIFICIAL NEURAL NETWORKS - Systems and methods for performing vector control of grid-connected power electronic converters using a neural network are described herein. Optionally, the grid-connected power electronic converters can be used in renewable and electric power system applications. In order to improve performance and stability under disturbance conditions, integrals of error signals can be introduced as inputs to the neural network. Alternatively or additionally, grid disturbance voltage can be introduced to an output of a trained neural network. | 12-11-2014 |
20140369087 | DETERMINING A PHASE AND A FREQUENCY OF AN ELECTRIC QUANTITY OF AN OPERATING ELECTRICAL DEVICE - A method and an apparatus for determining a phase and a frequency of an electric quantity being associated with an operation of an electrical device are described. The method comprises extracting a fundamental component of the electric quantity, calculating a positive sequence component of the electric quantity based on the extracted fundamental component, and determining the phase and the frequency of the electric quantity based on the calculated positive sequence component. | 12-18-2014 |
20150009723 | POWER CONVERSION CIRCUIT - A diode bridge has a pair of input ends to which an alternating current is inputted from an AC power supply, and a pair of output ends which output a direct current. A boost chopper circuit is connected to the pair of output ends, and sets up a DC voltage inputted thereto. The boost chopper circuit functions as a power factor correction circuit. A smoothing capacitor is connected to an output side of the boost chopper circuit, and smoothes the voltage across the smoothing capacitor. An inverter receives the voltage across the smoothing capacitor to apply AC power to a load. A leakage current reduction device outputs a compensating current which compensates for a leakage current leaking from the load. The leakage current reduction device outputs the compensating current, except near the zero crossing of an AC voltage inputted from the AC power supply. | 01-08-2015 |
20150036395 | INTERNAL INVERTER COMMUNICATIONS - Inverter internal communication features are disclosed. A multiple-stage inverter includes DC to DC and DC to AC converter switches in different power domains, which share no common return path connection. Operating parameters for converter switches in both power domains are determined by a single controller, located in one of the power domains. Converter control signals are communicated from the controller across an interface between the power domains. Respective, separate controllers in each power domain are not required. Components on each side of the interface could be integrated into respective integrated circuits. A planar transformer implemented in wiring levels of a Printed Circuit Board (PCB) that carries components of the inverter could be provided to enable communications between the power domains while reducing component count and physical space requirements. | 02-05-2015 |
20150357907 | ELECTROMAGNETIC INDUCTION TYPE POWER SUPPLY DEVICE - Disclosed is an electromagnetic induction type power supply device, which generates electric power through an electromagnetic induction method using a transformer from current flowing through a transmission line, can adjust an output thereof by detecting and feeding back the output, enables a transformer and a power converting unit to be added or removed as necessary. The electromagnetic induction type power supply device includes a transformer module including a plurality of transformers for outputting electric power by inducing, in an electromagnetic induction method, secondary current from primary current flowing through a transmission line; a power source module including a plurality of power converting units for converting the electric power output from the plurality of transformers to direct current power and outputting the converted power; and a power summing unit for summing the direct current power output from the plurality of transformers and providing the summed power to a load. | 12-10-2015 |
20160087426 | POWER SOURCE SWITCHING DEVICE AND STORAGE BATTERY SYSTEM - A third relay switches between an output of a first AC power source fed via a first relay and an output of a second AC power source fed via a second relay, and supplies the output after the switching to a load. A welding detection unit detects welding of the first relay. In order to switch the output of the first AC power source to the output of the second AC power source and supply the output of the second AC power source to the load, a power source switching control unit switches the first relay from the closed state to the open state, switches the third relay so as to select and feed the output of the second AC power source, and then prohibits switching of the second relay from the open state to the closed state until a first-relay welding detection processing by the welding detection unit is completed. | 03-24-2016 |
20160149506 | POWER MODULE FOR MEDIUM AND HIGH-VOLTAGE FREQUENCY CONVERTER AND FREQUENCY CONVERTER COMPRISING SAME - A power module for medium and high-voltage frequency converter and a frequency converter comprising same. The power module has a three-phase alternating current input and a single-phase alternating current output, and comprises a circuit board ( | 05-26-2016 |