With Low Pass L Or Lc Filter Patents (Class 363/47)
  • Patent number: 10333429
    Abstract: The present disclosure provides a method for controlling an inverter in an inverter system including the inverter, wherein the inverter includes a direct current-link capacitor, an inverting unit and a control unit, wherein the method comprises: when a direct current-link voltage of the direct current-link capacitor is greater than or equal to a predefined first voltage and is smaller than a second voltage which is greater than the first voltage, calculating a value using the direct current-link voltage and a time, and accumulating the calculated value over time to generate a cumulative value; when the cumulative value is greater than or equal to a predefined first value, blocking an output of the inverting unit; and when the direct current-link voltage is smaller than the first voltage, obtaining a value by subtracting a second predefined value from the cumulative value, and updating the cumulative value as the obtained value.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: June 25, 2019
    Assignee: LSIS CO., LTD.
    Inventor: Hyo-Jin Kim
  • Patent number: 9929668
    Abstract: A power conditioner includes a power converter module, a detector module and a control module. The power converter module performs power conversion upon a three-phase AC power input from a first microgrid based on a PWM output to generate a three-phase AC power output for a second microgrid. The detector module detects the three-phase AC power input, and a first zero sequence current input that is received by the power converter module from the second microgrid. The control module generates the PWM output based at least on a result of the detection, such that the power converter module further receives, from the first microgrid, a second zero sequence current input which is anti-phase with the first zero sequence current input.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: March 27, 2018
    Assignee: NATIONAL TAIWAN UNIVERSITY
    Inventors: Yaow-Ming Chen, Tung Yueh, Terng-Wei Tsai
  • Patent number: 9654054
    Abstract: The present general inventive concept is directed to provide a saturation prevention method that utilizes transfer function modulation to continuously and precisely condition signals over more than four orders of magnitude from a signal source. To avoid signal conditioning error and large transient behavior due to range switching, continuous conditioning of all ranges without saturation over the entire large input dynamic range is employed. The use of transimpedance amplifiers in an example embodiment induces negligible loading on the signal source such that the integrity of the original signal is fully maintained, enabling precise signal conditioning. The ratio of gain to input impedance with a transimpedance amplifier is orders of magnitude larger than other typical methods of signal conditioning, making these amplifiers optimum for the saturation prevention method.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: May 16, 2017
    Assignee: Technology For Energy Corporation
    Inventors: Kevin Christopher Omoumi, Allen Vaughn Blalock
  • Patent number: 9634556
    Abstract: A control method for a power converter is provided. The power converter includes an inductor, and a switch selectively turned on according to a control signal. The control method includes determining an on-time and a falling time according to a voltage information or a current information of the power converter; determining a switching period of the control signal according to the on-time, the falling time, and a resonant period corresponding to the inductor and a parasitic capacitance of the switch; adjusting the switching period by comparing the switching period with a first threshold period and a second threshold period; generating the control signal having the switching period when the switching period is greater than the first threshold period and less than the second threshold period or when the switching period is greater than the second threshold period and the power converter operates at over 50% of a rated power.
    Type: Grant
    Filed: May 7, 2015
    Date of Patent: April 25, 2017
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Chao Yan, Li-Ping Sun, Zhi-Hui Ding, De-Sheng Guo
  • Patent number: 9369059
    Abstract: An electrical circuit includes an input for an AC input voltage coupled to a first inductive element with first and second outputs coupled to respective first and second nodes, and a four-quadrant (4-Q) switch coupled between the first and second nodes. A capacitor is coupled between the first node and a third node, a second inductive element is coupled between the third node and the second node, and a first bidirectional device and a first diode are coupled in series between a positive output node and a negative output node. A first output of the second inductive element is coupled between the first bidirectional device and the first diode. A second bidirectional device and a second diode are coupled in series between the positive output node and the negative output node. A second output of the second inductive element is coupled between the second bidirectional device and the second diode.
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: June 14, 2016
    Assignee: Avogy, Inc.
    Inventors: Sitthipong Angkititrakul, Hemal N. Shah
  • Patent number: 9296589
    Abstract: An exemplary elevator drive includes a DC bus. At least some power components in a power section are electrically referenced to the DC bus. At least some control components in a control section including a drive controller and associated inputs are electrically referenced to the DC bus. This eliminates any requirement for isolating the components referenced to the DC bus from each other.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: March 29, 2016
    Assignee: Otis Elevator Company
    Inventor: Daryl J. Marvin
  • Patent number: 9209793
    Abstract: A bootstrap circuit provides a gate-emitter voltage to the high-side IGBT of a half-bridge IGBT arrangement. The bootstrap circuit includes a buck-boost circuit for providing a negative gate-emitter voltage for turning the high-side IGBT off.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: December 8, 2015
    Assignee: Infineon Technologies Austria AG
    Inventors: Jong-Mu Lee, Man-Kee Kim
  • Patent number: 9203298
    Abstract: A three-phase interleave converter with a TSSC includes: a filter circuit, a PFC circuit, a star connection between the filter circuit and the PFC circuit, and a second capacitor 7; where an output end of the filter circuit is connected to an input end of the PFC circuit by using a conducting wire; the star connection is set on the conducting wire connecting the filter circuit and the PFC circuit; one end of the star connection is connected to the conducting wire and the other end of the star connection is connected to one end of the second capacitor 7; and the other end of the second capacitor 7 is connected to an input wire. By using the foregoing solution, the number of capacitors is reduced from the original three to one. Therefore, fewer capacitors are used, and the volume is further reduced, thereby increasing the power density.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: December 1, 2015
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Shaohua Wang, Zhikai Wen
  • Patent number: 9184660
    Abstract: In an aspect, the present invention provides a high frequency switching power converter. The high frequency switching power converter may include a plurality of soft-switchable power cells flexibly connected to receive an input signal in series and provide an output. The high frequency switching power converter may further include a controller for configuring the flexible connection and for controlling the power cells to receive the input signal. In an embodiment, each of the plurality of power cells may be separately controllable by the controller. Further, a portion of the plurality of power cells may be arranged with parallel outputs. Additionally, at least one of the plurality of cells may include one or more switched capacitors. In another embodiment, the at least one of the plurality of cells may include at least one switched capacitor and a DC/DC regulating converter.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: November 10, 2015
    Assignee: FINsix Corporation
    Inventors: Anthony D. Sagneri, Jae-Won George Hwang, Justin Michael Burkhart, Fred Chen
  • Patent number: 9036382
    Abstract: Methods and apparatus are presented for detecting phase loss and/or excessive ripple in a power converter, in which bandpass filters are used to obtain harmonic voltage amplitudes associated with the power converter DC bus, and phase loss is detected if a ratio of the second harmonic to the sixth harmonic and/or a ratio of the fourth harmonic to the sixth harmonic exceed predetermined threshold values.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: May 19, 2015
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Bing Li, David Leggate, Timothy Rowan
  • Patent number: 8995153
    Abstract: The disclosure relates to a passive power factor correction circuit. The passive power factor correction circuit comprises: a filtering device being used for decreasing high order harmonic of an input current; a resonance device being coupled to the filtering device for controlling operation time of the input current; and a suppression device being coupled to the resonance device for suppressing ripple of the input current.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: March 31, 2015
    Assignee: Industrial Technology Research Institute
    Inventors: Po-Yen Chen, Ching-Tsai Pan
  • Patent number: 8964427
    Abstract: A phase angle detector with a PLL, a power converter, and a method for reducing offsets in an input signal, in which an adaptive offset processor selectively removes a DC offset component from the input signal to generate a modified signal including a fundamental frequency component and higher order harmonics of the input signal with the DC offset component removed, and the PLL provides a phase angle signal at least partially according to the modified signal.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: February 24, 2015
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Russel J. Kerkman, Ahmed Mohamed Sayed Ahmed, Brian J. Seibel
  • Patent number: 8933637
    Abstract: In one embodiment, an AC/DC power converter can include: a rectifier bridge and a filter capacitor for converting an external AC voltage to a half-sinusoid DC input voltage; a first storage component, where during each switching cycle in a first operation mode, a first path receives the half-sinusoid DC input voltage to store energy in the first storage component, and a first current through the first storage component increases; a second storage component, where a second path receives a second DC voltage to store energy in the second storage component, and a second current through the second storage component increases; and a third storage component, where in a second operation mode, the first current decreases to release energy from the first to the third storage component, where the second DC voltage includes a voltage across the third storage component through a third path.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: January 13, 2015
    Assignee: Silergy Semiconductor Technology (Hangzhou) Ltd.
    Inventors: Jian Deng, Binbin Li
  • Patent number: 8929105
    Abstract: In a power source circuit including a switching circuit 8 as a power conversion circuit for converting by a switching operation at least one of a frequency and a voltage of an alternating voltage from an alternating power source 2 via a pair of supply lines 3 and 4, one supply line 3 includes a fuse 5 as an excess current protection element, and between a ground line 10 and one supply line 3, a first line bypass capacitor 6 is connected. Between the ground line 10 and another supply line 4, a second line bypass capacitor 7 is connected, and another supply line 4 includes an inductor 9. With this configuration, an unbalanced state of the circuit due to the excess current protection element is reduced so as to restrain the common mode noise.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: January 6, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Ide, Daishiro Sekijima
  • Patent number: 8743572
    Abstract: The invention relates to a lossy triphase low-pass filter having a filter choke, a filter capacitor, and an attenuation element per phase of said the low-pass filter, wherein one filter capacitor and one attenuation element each are electrically connected in series. Two diodes are provided as attenuation elements, which are electrically connected to each other in an anti-parallel manner. In this manner a lossy triphase low-pass filter is obtained, the power loss of which is significantly reduced without any loss of the attenuation effect.
    Type: Grant
    Filed: April 1, 2009
    Date of Patent: June 3, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hubert Schierling, Benno Weis
  • Patent number: 8736204
    Abstract: Apparatus for transferring power between an electricity network (UP) operating on alternating-current electricity and a multiphase electric machine (M2, M3), which apparatus comprises low-voltage power cells (CS, C11 . . . CN6) operating on a cascade principle, which power cells comprise a single-phase output connector (OUT), and at least one transformer (TA, T1 . . . TN), comprising for each power cell connected to it a single-phase or multiphase winding dedicated to the specific power cell, which transformer comprises at least one additional winding (WA, WB1 . . . WBN) connected to the same magnetic circuit as the other windings for the purpose of at least one auxiliary circuit, which can be connected to the aforementioned additional winding.
    Type: Grant
    Filed: January 3, 2012
    Date of Patent: May 27, 2014
    Assignee: Vacon Oyj
    Inventors: Nicklas Södö, Risto Komulainen
  • Publication number: 20140042012
    Abstract: There is described herein a direct current power supply which offers improved control over an output signal. An input signal generated by an alternating current source is received and chopped by a solid state relay. The chopped signal is rectified by a bridge rectifier before being filtered by an “LC” (induction coil-capacitor) or “CLC” (capacitor-induction coil-capacitor) filter. The output signal can then be used as a direct current power supply signal. This power supply may be used in various types of ozone generation systems.
    Type: Application
    Filed: November 22, 2011
    Publication date: February 13, 2014
    Applicant: Ecovie Canada Technologies Inc.
    Inventors: Michele Clement, Donald L. Lulham, Raymond Latour, William J. Converse, Robert Clavel
  • Patent number: 8624369
    Abstract: A balance filter packaging chip having a balun mounted therein and a manufacturing method thereof are provided. The balance filter packaging chip includes a device substrate; a balance filter mounted on the device substrate; a bonding layer stacked on a certain area of the device substrate; a packaging substrate having a cavity formed over the balance filter, and combined with the device substrate by the bonding layer; a balun located on a certain area over the packaging substrate; and an insulator layer for passivating the balun. Accordingly, the present invention can reduce an element size and simplify a manufacturing process.
    Type: Grant
    Filed: August 23, 2007
    Date of Patent: January 7, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kuang-woo Nam, Yun-kwon Park, In-sang Song, Jea-shik Shin, Seok-mo Chang, Seok-chul Yun
  • Publication number: 20140003102
    Abstract: A phase angle detector with a PLL, a power converter, and a method for reducing offsets in an input signal, in which an adaptive offset processor selectively removes a DC offset component from the input signal to generate a modified signal including a fundamental frequency component and higher order harmonics of the input signal with the DC offset component removed, and the PLL provides a phase angle signal at least partially according to the modified signal.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 2, 2014
    Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.
    Inventors: Russel J. Kerkman, Ahmed Mohamed Sayed Ahmed, Brian J. Seibel
  • Patent number: 8593085
    Abstract: The present invention relates to an electrical device for charging accumulator means (5), said electrical device comprising: a motor (6) connected to an external mains (11); an inverter (2) connected to the phases of said motor (6); and switching means (4) integrated into the inverter (2), said switching means (4) being configured to permit said motor (6) to be supplied and to permit the accumulator means (5) to be charged by the inverter (2). According to the invention, said electrical device further includes, for each phase of said motor (6), an RLC low-pass filter (18) connected, on the one hand, to the mid-point (16) of the phase of said motor (6) and, on the other hand, to ground.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: November 26, 2013
    Assignee: Valeo Systemes de Controle Moteur
    Inventors: Boris Bouchez, Luis De Sousa
  • Patent number: 8587971
    Abstract: An electronic current transformer (ECT) based on complete self-excitation power supply is provided. The ECT includes an energy-obtaining coil, a rapid voltage-stabilizing circuit and an Analog/Digital (A/D) converting circuit. The output of the energy-obtaining coil is connected with the input of the voltage-stabilizing circuit. The output of the voltage-stabilizing circuit is connected with the control end of the A/D converting circuit. The ECT uses two branch circuits to obtain energy directly from the magnetic field of a bus bar to be measured respectively, synthesizes two output waveforms to fill the wave trough of each other, and reduces the pulse of direct current. In this way, the trough voltage of the synthesized wave is higher than the required stabilizing value of direct voltage and it directly meets the input requirement of the stabilizing module of the voltage-stabilizing circuit. As a result, the ECT can activate the A/D converting circuit rapidly.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: November 19, 2013
    Assignee: Xi'an Hwell Optic-Electric Tech Co., Ltd
    Inventors: Zhongzhan Liu, Xun Wu, Yanting Song
  • Patent number: 8570778
    Abstract: A power converter, comprising an input circuit having a single diode rectifier (D); and a switcher mode power supply IC (SMPS).
    Type: Grant
    Filed: October 5, 2004
    Date of Patent: October 29, 2013
    Assignee: NXP B.V.
    Inventor: Cornelis Johannes Adrianus Schetters
  • Patent number: 8564981
    Abstract: A device for converting a DC voltage into an AC voltage includes a passive electronic filter having a first and second energy storage element, a third energy storage element placed between the first and second energy storage elements, a fourth energy storage element connected between a junction of the first energy storage element and the third energy storage element and an AC terminal and a fifth energy storage element connected between a junction of the second energy storage element and the third energy storage element and the AC terminal. The energy storage elements are of two different types, capacitive and inductive, with values selected to provide reduction of frequency components at two times the fundamental frequency of the AC voltage and at three times the fundamental frequency of the AC voltage.
    Type: Grant
    Filed: April 15, 2010
    Date of Patent: October 22, 2013
    Assignee: ABB Research Ltd.
    Inventors: Lennart Harnefors, Staffan Norrga, Anshuman Shukla
  • Patent number: 8537576
    Abstract: A power supply for generating temporally specifiable, open- and closed-loop controlled current paths includes a first controllable rectifier group that includes at least one rectifier having a smoothing inductor at an output. An active filter is connected in parallel to a load, the active filter including a second rectifier group with at least one rectifier and a pulse bridge connected to an output thereof. A second-order low pass filter has a clock inductor, a capacitor, and an RC damping, the clock inductor being connected located at an output of the pulse bridge.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: September 17, 2013
    Assignee: GSI Helmholtzzentrum fuer Schwerionenforschung GmbH
    Inventors: Heinz Ramakers, Horst Welker
  • Publication number: 20130235628
    Abstract: Leakage current through stray or parasitic capacitance (which is particularly large in devices such as photovoltaic cell arrays and which are damaged by such leakage currents) due to common mode switching noise in a full bridge single phase power converter is reduced at high frequencies by magnetically coupling the two phase legs on the AC side of the power converter and connecting mid points of the AC and DC sides of the power converter and is reduced at low frequencies by use of a feedback arrangement that modifies sinusoidal modulation of the switches of the full bridge converter to function as an active filter. The magnetic coupling for the two phase legs is designed in a simple manner to avoid saturation based on volt-second considerations.
    Type: Application
    Filed: March 8, 2012
    Publication date: September 12, 2013
    Inventors: Dong Dong, Fang Luo, Dushan Boroyevich, Paolo Mattavelli
  • Patent number: 8513911
    Abstract: A power converter that interfaces a motor requiring variable voltage/frequency to a supply network providing a nominally fixed voltage/frequency includes a first rectifier/inverter connected to a stator and a second rectifier/inverter. Both rectifier/inverters are interconnected by a dc link and include switching devices. A filter is connected between the second rectifier/inverter and the network. A first controller for the first rectifier/inverter uses a dc link voltage demand signal indicative of a desired dc link voltage to control the switching devices of the first rectifier/inverter. A second controller for the second rectifier/inverter uses a power demand signal indicative of the level of power to be transferred to the dc link from the network through the second rectifier/inverter, and a voltage demand signal indicative of the voltage to be achieved at network terminals of the filter to control the switching devices of the second rectifier/inverter.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: August 20, 2013
    Assignee: Converteam Technology Ltd.
    Inventors: Rodney Jones, Christopher Newton
  • Patent number: 8488346
    Abstract: According to one embodiment, a power conversion apparatus determines a peak value of circuit current in each pulse cycle, from a corrected output voltage value by subtracting a predetermined reference voltage from an output voltage detected by the output voltage detector, and an input voltage detected by the input voltage detector. The pulse signal output unit outputs a pulse signal to the first switch when the polarity of input voltage is positive, and outputs a pulse signal to the second switch when the polarity of input voltage is negative. A pulse signal turns on in synchronization with a clock signal input from the oscillator, and is kept on until the circuit current detected by the circuit current detector reaches the peak value. A pulse signal turns off when the circuit current reaches the peak value, and turns on again in synchronization with the next clock signal.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: July 16, 2013
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventor: Yutaka Usami
  • Patent number: 8411473
    Abstract: A three-phase power supply with a three-phase three-level DC/DC converter includes a full-bridge thyristor converter with three-set four in-series power switch elements, a three-phase isolated transformer, a full-bridge rectifier, a rectifying circuit, and a low-pass filtering circuit. The three-phase power supply is used to deliver power energy from the AC input voltage to the load. The power switch elements, which separated to each other at 120-degree phase differences, are controlled through a phase shift scheme. Therefore, the three-level circuit structure is provided to reduce withstanding voltage of the power switch elements, further the zero-voltage switching (ZVS) is achieved by the isolated transformer and the power switch elements to increase the efficiency of the DC/DC converter.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: April 2, 2013
    Assignee: Allis Electric Co., Ltd.
    Inventors: Chaur-Ping Cheng, Chih-Hsing Fang, Wen-Wei Chan, Po-Yuan Chen
  • Publication number: 20130077361
    Abstract: This disclosure provides systems, methods, and apparatus for filtering of a rectifier in a wireless power receiver. In one aspect a wireless power receiver is provided. The wireless power receiver includes a rectifier circuit configured to provide direct-current (DC) based at least in part on a time-varying voltage generated via a wireless field provided from a wireless power transmitter. The wireless power receiver further includes a band-stop filter circuit configured to filter an output of the rectifier circuit and electrically isolate a capacitor from the rectifier circuit at an operating frequency.
    Type: Application
    Filed: March 30, 2012
    Publication date: March 28, 2013
    Applicant: QUALCOMM Incorporated
    Inventors: Zhen Ning Low, Sreenivas Kasturi, Xuanning Gao
  • Publication number: 20130077360
    Abstract: This disclosure provides systems, methods, and apparatus for filtering of a rectifier in a wireless power receiver. In one aspect a wireless power receiver apparatus is provided. The receiver apparatus includes a coil circuit configured to wirelessly receive power via a wireless field. The receiver apparatus further includes a rectifier circuit configured to provide direct-current (DC) based at least in part on the received power. The receiver apparatus further includes a first filter circuit electrically connected between the coil and the rectifier circuit and configured to reduce emissions from the rectifier circuit and configured to maintain a first impedance presented by the rectifier circuit substantially equal to a second impedance presented to the coil circuit. The receiver apparatus further includes a band-stop filter circuit configured to electrically isolate emissions from the rectifier circuit.
    Type: Application
    Filed: September 24, 2012
    Publication date: March 28, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: Zhen Ning Low, Fang Han, Xuanning Gao, Sreenivas Kasturi
  • Patent number: 8395913
    Abstract: A power factor correction of three-phase boost-type conversion is disclosed. Embodiments comprising multi-leg autotransformers are disclosed, e.g. comprising 3-phase low-pass filtering impedances such as capacitors between an input of a converter and a midpoint of the output.
    Type: Grant
    Filed: October 10, 2011
    Date of Patent: March 12, 2013
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Grover Victor Torrico-Bascopé
  • Patent number: 8390149
    Abstract: A distributed electrical power generating and utilizing system includes an induction generator driven by a prime mover requiring reactive power to operate for providing electrical power on a bus. The bus has a gross load and is also connectable to a utility power grid by a switch. The gross load includes at least a non-linear electrical load component, typically including a variable speed device and associated diode rectifier front end. The bus includes a harmonic filter having a power factor-correcting capacitor integrated therewith for collectively compensating harmonic distortion caused by the non-linear load component and for correcting power factor to compensate for reactive power required by at least the inductive generator.
    Type: Grant
    Filed: December 24, 2007
    Date of Patent: March 5, 2013
    Assignee: United Technologies Corporation
    Inventors: Steven J. Fredette, Rishi Grover
  • Patent number: 8331115
    Abstract: In one aspect, the invention provides a power system for providing power to a load.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: December 11, 2012
    Assignee: Ameritherm, Inc.
    Inventors: David L. Fenton, Ian A. Paull, Leslie L. Thompson, Kenneth J. Westveer
  • Patent number: 8325500
    Abstract: An inverter filter is for a plurality of phases. The inverter filter includes a node; a differential mode filter including for each of the phases a first terminal, a second terminal, an inductor electrically connected between the first terminal and the second terminal, and first capacitor electrically connected between the inductor and the node. The inverter filter also includes a third terminal structured to be grounded, and a common mode filter. The common mode filter includes a resistor, and a second capacitor electrically connected in series with the resistor between the node and the third terminal.
    Type: Grant
    Filed: July 13, 2010
    Date of Patent: December 4, 2012
    Assignee: Eaton Corporation
    Inventor: Ron C. Schueneman
  • Patent number: 8325501
    Abstract: A power factor correction of three-phase boost-type conversion is disclosed. Embodiments comprising multi-leg autotransformers are disclosed, e.g. comprising 3-phase low-pass filtering impedances such as capacitors between an input of a converter and a midpoint of the output.
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: December 4, 2012
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Grover Victor Torrico-Bascopé
  • Patent number: 8278882
    Abstract: A charging monitor has a switch disposed between a load section having a storage battery and an external AC power supply supplying a current to the load section via a plurality of lines and interrupts the supply of the current from the external AC power supply to the load section; a current detection circuit; a suppression circuit that suppresses a DC component contained in the detection signal; a filter circuit that filters a plurality of frequency components contained in the detection signal so that attenuation increases as a frequency becomes high; a rectifier smoothing circuit that rectifies and smoothens an output signal; and an electric leakage determination circuit that detects an electric leakage and shuts off the switch.
    Type: Grant
    Filed: July 23, 2008
    Date of Patent: October 2, 2012
    Assignee: Panasonic Corporation
    Inventors: Kiyoshi Gotou, Hiroaki Koshin, Hiroshi Ooya
  • Patent number: 8259473
    Abstract: A method and apparatus are provided for operation of a converter circuit, which includes a converter unit having a multiplicity of controllable power semiconductor switches, and which is connected via a transformer to a three-phase electrical AC voltage power supply system. The method includes controlling the controllable power semiconductor switches by means of a control signal which is formed from a regulating signal. In order to damp oscillations of a power supply system voltage above the fundamental frequency, a filtered power supply system current is formed by filtering a power supply system current using a low-pass filter characteristic. A filtered transformer inductance voltage is formed by filtering a transformer inductance voltage, which is formed from the power supply system current, using a low-pass filter characteristic. A filtered power supply system voltage is formed by filtering a power supply system voltage using a low-pass filter characteristic.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: September 4, 2012
    Assignee: ABB Schweiz AG
    Inventors: Beat Ronner, Tobias Thurnherr
  • Patent number: 8159841
    Abstract: A method, device, and plurality of circuit enhancements for a rectifier system that enable reduction in lower order and higher order harmonics, without substantially reducing the rectifier's direct current output voltage. The rectifier system comprises a phase shifting primary transformer subsystem and a multi-pulse rectifier. At least one series impedance path is coupled to one of three input terminals/leads of the transformer subsystem and conducts one phase of three phase currents from a power supply to the transformer subsystem. The series impedance path provides low impedance to the 1st harmonic and substantially higher, inductive impedance to higher harmonics of the power supply frequency.
    Type: Grant
    Filed: April 6, 2009
    Date of Patent: April 17, 2012
    Assignee: Howard Industries, Inc.
    Inventor: Donald W. Owen
  • Patent number: 8027177
    Abstract: A transformer includes a first secondary winding, a second secondary winding, and a third secondary winding. The second secondary winding and the third secondary winding are wound to include the same number of turns and to have opposite magnetic polarities. A low-pass filter includes a second inductor defined by a leakage inductance of the second secondary winding connected in series with the second secondary winding, a second inductor defined by a leakage inductance of the third secondary winding connected in series with the third secondary winding, and a second capacitor. An output voltage is output from an output terminal of the low-pass filter.
    Type: Grant
    Filed: December 29, 2010
    Date of Patent: September 27, 2011
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Tatsuya Hosotani
  • Patent number: 8022575
    Abstract: Exemplary embodiments of the present disclosure provide a method and controller for damping multimode electromagnetic oscillations in electric power systems which interconnect a plurality of generators and consumers. The controller for damping such oscillations includes a phasor measurement unit (PMU) and a power oscillation damper (POD) controller. Each oscillating mode signal is damped and then superposed to derive a control signal. A feedback controller is used to feedback the control signal to a power flow control device in the power system.
    Type: Grant
    Filed: September 16, 2009
    Date of Patent: September 20, 2011
    Assignee: ABB Research Ltd
    Inventors: Petr Korba, Mats Larsson
  • Patent number: 8018696
    Abstract: A system for moving an aircraft thrust reverser component includes a power drive unit, a thrust reverser actuator assembly, and a tertiary lock system. The power drive unit is operable to rotate and supply a rotational drive force. The thrust reverser actuator assembly receives the rotational drive force from the power drive unit and moves the thrust reverser component between a stowed position and a deployed position. The tertiary lock system selectively engages and disengages the thrust reverser component and includes a tertiary lock power unit, an electromechanical tertiary lock assembly, and a voltage limiting circuit. The voltage limiting circuit limits the voltage magnitude of a control signal supplied to the tertiary lock assembly to a predetermined value.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: September 13, 2011
    Assignee: Honeywell International Inc.
    Inventor: Terry L. Ahrendt
  • Patent number: 8008886
    Abstract: A power converter is provided with a rectifying circuit, an inverter circuit, and a common mode filter including a common mode choke coil and a capacitor. The switching frequency of a PWM rectifying circuit is set at three times the switching frequency of a PWM inverter. Alternatively, the resonance frequency of the common mode filter is set at twice the carrier frequency of the rectifying circuit or the PWM inverter circuit or more.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: August 30, 2011
    Assignee: Daikin Industries, Ltd.
    Inventors: Reiji Kawashima, Yoshitsugu Koyama
  • Patent number: 7907427
    Abstract: The inverter comprises a diode bridge (21) that rectifies an inputted three-phase AC voltage into a DC voltage, an inverter section (22) that converts the DC voltage converted by the diode bridge (21) into an AC voltage and outputs the resulting voltage, an LC filter that has an inductor Ldc connected between one output terminal of the diode bridge (21) and one input terminal of the inverter section and a capacitor Cdc connected across the input terminals of the inverter section, a voltage detecting section (24) that detects cross terminal voltage of the inductor Ldc, and a control section (100) that controls the inverter section (22). The control section (100) controls the inverter section (22) so that the transfer characteristic of the I/O voltage of the inverter section (22) becomes a characteristic of the first-order lag system on the basis of the cross terminal voltage of the inductor Ldc detected by the voltage detecting section (24).
    Type: Grant
    Filed: June 12, 2007
    Date of Patent: March 15, 2011
    Assignee: Daikin Industries, Ltd.
    Inventors: Kenichi Sakakibara, Hitoshi Haga
  • Patent number: 7898827
    Abstract: An active electromagnetic interference (EMI) filtering may reduce the requirements for high current differential mode inductors. The active EMI filtering of the present invention may be useful in power devices that use switching power converters. Conventional EMI differential mode filtering devices may occupy up to 30% of the total weight and volume of the power electronics. Conventional differential mode filtering inductors tend to be large and heavy, especially so for high current input power lines. The present invention may replace the large conventional differential mode filtering inductors with a smaller set of coupled inductors.
    Type: Grant
    Filed: May 22, 2008
    Date of Patent: March 1, 2011
    Assignee: Honeywell International Inc.
    Inventors: Evgeni Ganev, William Warr
  • Patent number: 7868730
    Abstract: The invention relates to a filtering device which includes a common-mode inductor (LF) comprising a winding (L1, L2) on each line of an AC power supply and a magnetic core made up of a first torus (T1) and a second torus (T2). The first torus (T1) has a first magnetic permeability (?1) and the second torus (T2) has a second magnetic permeability (?2, ??2), the first permeability being equal to or greater than three times the second permeability, in order to prevent the common-mode inductor from saturating in the resonant frequency range of the filtering device. Application to the EMC filter of a speed variator.
    Type: Grant
    Filed: October 4, 2007
    Date of Patent: January 11, 2011
    Assignee: Schneider Toshiba Inverter Europe SAS
    Inventor: Jean Lafontaine
  • Patent number: 7821799
    Abstract: A power converter includes an isolated or a nonisolated current-doubler rectification circuit including two magnetic circuit elements, each magnetic circuit element formed with a primary winding and a voltage-sensing winding. The primary windings are coupled in series. The voltage-sensing windings are also coupled in series but with a coupling sense opposite from that of the primary windings. A properly sized inductor and capacitor are coupled in series with the voltage-sensing windings to produce a ripple-cancellation current with slope opposite to a net slope error of currents produced in the two magnetic circuit elements. The current-doubler rectification circuit is preferably coupled to a rectangular ac input waveform. By sensing a scaled voltage difference between two magnetic circuit elements, a very low level of output ripple is produced by the circuit with very low power losses over a range of operating conditions.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: October 26, 2010
    Inventor: Mark E. Jacobs
  • Patent number: 7800330
    Abstract: This deadbeat control method for regulating an output voltage Uc or an output current Il of a low-pass RLC filter includes: calculation (92) of a current setting ?uc for the average intensity ?u of a DC current Iu flowing through a first output point of the filter between instants ti and ti+1, this setting ?uc being established from discretized state equations of the filter in such a way that the voltage Uc or the line current Il is equal to a predetermined setting of voltage Ucc or of line current Ilc at the instant ti+1, control (100) of an electric converter in order to produce a current Iu flowing through the filter, the average intensity ?u of which between the instants ti and ti+1 is equal to the current setting ?uc.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: September 21, 2010
    Assignee: Alstom Transport SA
    Inventor: Jean Alacoque
  • Publication number: 20100226152
    Abstract: The inverter includes an electrolytic capacitor which receives DC power, a series resonant circuit connected in parallel with the electrolytic capacitor, and a switching device group which converts the DC power into AC power by switching using pulse width modulation.
    Type: Application
    Filed: October 6, 2008
    Publication date: September 9, 2010
    Applicant: Daikin Industries, Ltd.
    Inventor: Abdallah Mechi
  • Patent number: 7787268
    Abstract: In one aspect, the invention provides a power system for providing power to a load.
    Type: Grant
    Filed: November 17, 2008
    Date of Patent: August 31, 2010
    Assignee: Ameritherm, Inc.
    Inventors: David L. Fenton, Ian A. Paull, Leslie L. Thompson, Kenneth J. Westveer
  • Patent number: 7778052
    Abstract: A method is disclosed for the operation of a converter circuit, wherein the converter circuit has a converter unit having a multiplicity of actuatable power semiconductor switches and an LCL filter which is connected to each phase connection of the converter unit, in which the actuatable power semiconductor switches are actuated by means of an actuation signal (S) formed from a hysteresis active power value (dP), from a hysteresis reactive power value (dQ) and from a selected flux sector (?n). The hysteresis active power value (dP) is formed from a differential active power value (Pdiff). In addition, the hysteresis reactive power value (dQ) is formed from a differential reactive power value (Qdiff). An apparatus for carrying out the method is also disclosed.
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: August 17, 2010
    Assignee: ABB Schweiz AG
    Inventors: Leonardo Serpa, Srinivas Ponnaluri