Using Impedance-type Converter Patents (Class 363/140)
  • Patent number: 10615710
    Abstract: Electric power devices and control methods are provided which automatically select a line voltage or phase voltage of an AC voltage supply. The electric power device includes a switchable circuit, a sensor and a switch control. The switchable circuit connects to the AC voltage supply, and includes multiple switchable elements. The sensor ascertains a voltage level of the AC voltage supply, and the switch control automatically establishes a configuration of the switchable circuit through control of the multiple switchable elements. The switch control couples the electric power device in a line-line (delta) configuration to the AC voltage supply when the voltage level is in a first voltage range, and a line-neutral (wye) configuration when the voltage level is in a second voltage range.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: April 7, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Steven J. Ahladas, Kevin R. Covi, Luke L. Jenkins, Robert B. Schlak
  • Patent number: 10541539
    Abstract: A converter includes a converter circuit including a rectifying section to rectify an alternating current (AC) voltage and a smoothing section to smooth a direct current (DC) voltage rectified by the rectifying section, a diagnostic device configured to diagnose an abnormality of the converter circuit, an inrush current preventing section configured to prevent inrush current from being supplied to the smoothing section, and a switching section configured to supply the AC voltage to the converter circuit through a path different from a voltage supply path of the inrush current preventing section, wherein the diagnostic device determines an abnormal region of the converter circuit by controlling the inrush current preventing section and the switching section.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: January 21, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hiroyuki Miyake, Seisaku Oosako, Masaki Ono, Yasuyuki Yamada, Yuichi Takeda
  • Patent number: 10277121
    Abstract: A charge pump circuit includes a first switch˜a fourth switch, a capacitor, a current source, a first resistor, a second resistor, an amplifier, another current source, a current mirror, a skip detection circuit, a switch generation circuit and a control unit. A method includes: (a) starting the charge pump circuit; (b) operating the charge pump circuit in a first phase, wherein the first switch and second switch are conducted and the third switch and fourth switch are disconnected; (c) operating the charge pump circuit in a second phase, wherein the third switch and fourth switch are conducted and the first switch and second switch are disconnected; (d) determining whether a detected voltage in the skip detection circuit is higher than a threshold voltage; and (e) selectively performing step (b) or (c) again according to determination result of step (d).
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: April 30, 2019
    Assignee: Raydium Semiconductor Corporation
    Inventors: Pei-Kai Tseng, Li-Chieh Chen, Chih-Jen Hung
  • Patent number: 9899829
    Abstract: A device for limiting a fault current for a generator, in particular of a wind turbine is provided. A first frame is made of a ferromagnetic material, wherein the first frame comprises a first frame section and a further first frame section, wherein a first gap is formed between the first frame section and the further first frame section. A first coil is wound around the first frame section, wherein the first coil is connectable to a first stator winding of a stator of the generator. A further first coil is wound around the further first frame section, wherein the further first coil is connectable to an electronic device. A first permanent magnet element is arranged inside the first gap. The first frame section and the further first frame section are formed with respect to each other such that an electromagnetic interaction between the first coil and the first permanent magnet element and the further first coil and the first permanent magnet element is provided.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: February 20, 2018
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Arwyn Thomas
  • Patent number: 9844141
    Abstract: An inductor is integrated into a multilevel wiring network of a semiconductor integrated circuit. The inductor includes a planar magnetic core and a conductive winding. The conductive winding turns around in generally spiral manner on the outside of the planar magnetic core. The conductive winding is piecewise constructed of wire segments and of VIAs. The wire segments pertain to at least two wiring planes and the VIAs are interconnecting the at least two wiring planes. Methods for such integration, and for fabricating laminated planar magnetic cores are also presented.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: December 12, 2017
    Assignee: Ferric, Inc.
    Inventor: Noah Andrew Sturcken
  • Patent number: 9716428
    Abstract: A high voltage transformer for transforming electric power from a high voltage direct current source to a lower voltage direct current or to a lower voltage alternating current, without intermediate magnetic transformation. The transformer has a number of stages. Each stage includes capacitors and switching devices. There is a controller that controls the switching devices to change the polarity of one or more capacitors.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: July 25, 2017
    Inventors: Lionel O. Barthold, Dennis A. Woodford
  • Publication number: 20150138860
    Abstract: Electrical devices, methods of operating an electrical device for use with a multiway switch system, and methods for connecting an electrical device with a load device and a multiway switch system for controlling the load device are described. In one embodiment, an electrical device for use with a multiway switch system includes an alternating current (AC) power interface configured to connect to at least one of a live wire and a neutral wire of an AC power supply, a load regulator module configured to regulate a load device that is connected to the neutral wire of the AC power supply, an output power interface configured to connect to the multiway switch system and to output a voltage to a switch of the multiway switch system, and a microcontroller module configured to control the load regulator module in response to a switching of the multiway switch system.
    Type: Application
    Filed: November 21, 2013
    Publication date: May 21, 2015
    Inventor: Winston Cheng
  • Publication number: 20150078054
    Abstract: A common mode inductor device includes a magnetic core forming a continuous loop, a first winding wound around the magnetic core, and a second winding wound around the magnetic core. The magnetic core further includes a first leg section, a second leg section, a third leg section and a fourth leg section. The first winding is wound around the first leg section, the second winding is wound around the second leg section, the third leg section is provided between a first end area of the first leg section and a first end area of the second leg section, and the fourth leg section is provided between a second end area of the first leg section and a second end area of the second leg section.
    Type: Application
    Filed: April 4, 2013
    Publication date: March 19, 2015
    Inventors: Erik Myhre, Thomas Olsen, Jan Tore Brastad, Håkon Hafnor
  • Publication number: 20150043263
    Abstract: Disclosed is a power inverter which converts voltage from a DC source into high frequency rectangular alternating voltage pulses which are transferred to a load via a transformer with a ferromagnetic core having no air gap. An additional indicator winding on the transformer, which is connected to a differential circuit which in turn is connected to a control circuit, makes it possible to control the process of the reversal of the magnetization of the core. Switching on the primary winding takes place when the permeability of the transformer's core achieves its maximum. This special feature makes it possible to minimize the size of the transformer, while allowing transferring maximum energy to the load with minimum of the magnetization frequency and losses.
    Type: Application
    Filed: August 11, 2014
    Publication date: February 12, 2015
    Inventors: Anatoly Diber, Grigoriy Isayevich Katsman
  • Patent number: 8952676
    Abstract: A transmitting and receiving electrode system, and power transmission method using the same are provided. The transmitting and receiving electrode system includes: a voltage/current detection unit measuring a voltage and a current in real time while power is being transmitted between first and second electrodes; a controller calculating a variable element value based on the voltage and current values transferred from the voltage/current detection unit; and a variable element unit converting a variable element under the control of the controller to adjust an impedance of a power source.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: February 10, 2015
    Assignee: Industry-Academic Cooperation Foundation, Chosun University
    Inventors: Youn-Tae Kim, Kun-Ho Park, Jang-Myoung Kim, Min-Joo Jeong, Chang-Hee Hyoung, Jung-Hwan Hwang, Sung-Weon Kang
  • Patent number: 8848404
    Abstract: An exemplary power conversion system is disclosed including a DC bus for receiving DC power; a line side converter electrically coupled to the DC bus for converting the DC power to AC power; and a voltage source controller to provide control signals to enable the line side converter to regulate the AC power. The voltage source controller comprises a signal generator to generate the control signals based at least in part on a power command signal and a power feedback signal. The voltage source controller further comprises a current limiter to, during a transient event, limit the control signals based at least in part on an electrical current threshold. The voltage source controller further comprises a voltage limiter to, during the transient event, limit the control signals based at least in part on a DC bus voltage feedback signal and a DC boundary voltage threshold.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: September 30, 2014
    Assignee: General Electric Company
    Inventors: Zhuohui Tan, Xinhui Wu, Xueqin Wu, Maozhong Gong, Xiaoming Guo
  • Publication number: 20140268968
    Abstract: A transformer comprises a primary winding 231; a secondary winding 233; a first electrostatic screen 234 located between the primary winding and the secondary winding and most proximate to the primary winding means; and a second electrostatic screen 235 located between the primary winding and the secondary winding means and most proximate to the secondary winding means. The first electrostatic screen is electrically connectable to a power supply electrically connectable to the primary winding and the second electrostatic screen is electrically connectable to a load electrically connectable to the secondary winding. The invention also includes an inverter system including the transformer.
    Type: Application
    Filed: July 4, 2012
    Publication date: September 18, 2014
    Applicant: E2V Technologies (UK) Limited
    Inventor: Robert Richardson
  • Patent number: 8817509
    Abstract: 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.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: August 26, 2014
    Assignee: Daihen Corporation
    Inventors: Michio Taniguchi, Yoshinori Tsuruda
  • Publication number: 20140204641
    Abstract: A system for regulating the output of a high-voltage, high-power DC supply, the system includes a high-voltage DC power supply, a storage capacitor, and at least one non-dissipative regulator having an output voltage range less than an output voltage range of the high-voltage DC power supply. The regulator includes an internal storage capacitance and a control circuit configured to maintain a desired high-voltage output on a load.
    Type: Application
    Filed: January 18, 2013
    Publication date: July 24, 2014
    Applicant: DIVERSIFIED TECHNOLOGIES, INC.
    Inventors: Marcel Pierre Joseph Gaudreau, Ian Saul Roth, Michael Alan Kempkes, Neal R. Butler
  • Publication number: 20140169056
    Abstract: The present invention is related to a clean energy generating device which includes coiled or spiral shaped conductors, for receiving electromagnetic wave and inducing electric current, and elements which can create magnetic fields passing through the coiled or spiral shaped conductors for rectifying alternating current (AC) and transforming random electron movement from heat into direct current (DC) at the same time. The direct current (DC) is usable by an electronic device to supply power. The length, number of circles and the radius of the circles of the coiled or spiral shaped conductors are not limited and can be adjusted for receiving and rectifying effect. Thus, this invention make effective use of electromagnetic radiation and heat in the air to produce electricity. Furthermore, it can be combined with a specially designed unit to produce hydrogen from water to achieve output of clean energy fuel and practical purposes.
    Type: Application
    Filed: December 13, 2013
    Publication date: June 19, 2014
    Inventor: YI-YI CHEN
  • Publication number: 20140133633
    Abstract: An electrical circuit for alternating current generation comprising a direct current control box, a first inductor, a second inductor, a first capacitor, and dual load connections. The direct current control box can alternately provide positive direct current to the first inductor then negative direct current to the second inductor. A second end of each inductor can be electrically connected together and electrically connected to a first load connection. A common connection on the control box can be electrically connected to a second load connection. The first load connection and the second load connection can be configured to be electrically connected across a load. A first capacitor can be electrically connected between the first load connection and the second load connection and configured to be electrically connected in series or parallel parallel with the load.
    Type: Application
    Filed: April 15, 2013
    Publication date: May 15, 2014
    Applicant: Moxtek, Inc.
    Inventor: Moxtek, Inc.
  • Publication number: 20140112042
    Abstract: A common mode filter and a power supply device having the same are provided. The common mode filter includes a first inductor having a first winding number, a second inductor facing the first inductor and having a second winding number, a first intermediate terminal branching from an intermediate portion of a coil of the first inductor, and a second intermediate terminal branching from an intermediate portion of a coil of the second inductor. The effects of two filters are obtained from one common mode filter and the volume is reduced, so that a light, thin, short, and short module is provided.
    Type: Application
    Filed: October 22, 2013
    Publication date: April 24, 2014
    Applicant: LG INNOTEK CO., LTD.
    Inventor: Yong Hee LEE
  • Publication number: 20140003110
    Abstract: A device, system, and method for communicating with a power inverter of an array of inverters includes transmitting a relay message from an inverter array controller to a relay inverter in response to failing to receive a response from at least one power inverter of the array. The relay inverter is configured to retransmit a message from the inverter array controller to a non-responsive power inverter of the array of inverters in response to receiving the relay message. The relay inverter may subsequently retransmit a reply received from the non-responsive power inverter to the inverter array controller or to another power inverter of the array of inverters.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 2, 2014
    Inventors: Philip Rothblum, Brian T. Kuhn, Jonathan Ehlmann, Patrick L. Chapman
  • Patent number: 8582319
    Abstract: A resonant mode converter includes a PFC power converter having an input coupled to receive an input voltage. An LLC power converter is cascaded with the PFC power converter. The LLC power converter includes a transformer coupled to generate an output of the resonant mode converter. A feedback circuit is coupled to generate a first current representative of the output of the resonant mode converter. A control unit includes a current limiting circuit coupled to receive the first current and a second current generated in response to a reference voltage. The current limiting circuit is coupled to limit the first current in response to the second current. The control unit further includes an oscillator coupled to generate a control signal having a control frequency in response to the first current. The resonant mode converter output is controlled in response to the control frequency.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: November 12, 2013
    Assignee: Power Integrations, Inc.
    Inventors: Anthony Reinberger, Paul Demone
  • Publication number: 20130201742
    Abstract: A voltage converting circuit includes a plurality of first capacitors that are charged by a power source, a second capacitor, connected in parallel to the plurality of first capacitors, which is able to be charged to a voltage that is supplied to a load circuit, and a plurality of switching circuits, provided in such a way as to correspond to the plurality of first capacitors, each of which switches states of connection between its corresponding first capacitor and the second capacitor. The first capacitors are sequentially connected to the second capacitor through the corresponding switching circuits as charging voltages of the first capacitors reach a predetermined connection voltage that is higher than a charging voltage of the second capacitor so that the first capacitors are not short-circuited with each other.
    Type: Application
    Filed: March 16, 2011
    Publication date: August 8, 2013
    Applicant: OMRON CORPORATION
    Inventors: Misato Nabeto, Kenji Sakurrai, Tatsuakira Masaki, Hiroshi Sameshima, Hiroshi Tsuji
  • Publication number: 20130188408
    Abstract: A wireless power transmission system includes: a power transmitting section that converts DC energy input from a DC energy source into AC energy of a frequency f0; a transmitting antenna; and a receiving antenna. The power transmitting section includes: a class-E oscillator circuit including a switching element and a capacitor which are connected in parallel to the DC energy source, for converting the DC energy into the AC energy; and a switching control section that inputs a control signal for controlling a conduction state of the switching element to the switching element. The switching control section switches the switching element from a non-conductive state to a conductive state when a preset time period has elapsed or when a potential difference across the switching element takes a local minimum value after the switching element is switched from the conductive state to the non-conductive state.
    Type: Application
    Filed: January 8, 2013
    Publication date: July 25, 2013
    Applicant: PANASONIC CORPORATION
    Inventor: Panasonic Corporation
  • Publication number: 20130128622
    Abstract: A power converting apparatus makes reduction of power loss possible and operates in a two-phase mode. A power converting apparatus of the inventive concept includes I-shaped block cores, each being made of a magnetic material; and E-shaped cores, each being produced by combining two L-shaped magnetic materials to each of the I-shaped cores. In each of the E-shaped cores, the block core is defined as a central leg, the other two legs are defined as a first outside leg and a second outside leg, respectively, and a closed magnetic path is configured by two E-shaped cores combined such that one of respective central legs in the two E-shaped cores, one of respective first outside legs therein, and one of respective second outside legs therein are caused to face the other of the central legs, the other of the first outside legs, and the other of the second outside legs.
    Type: Application
    Filed: May 12, 2012
    Publication date: May 23, 2013
    Applicants: NIKKINDENJI KOGYO CO., LTD., SHINTO HOLDINGS CO., LTD.
    Inventors: Yuichi HASEGAWA, Hiromune ISHII, Yuki SATAKE, Takeshi KAWAHARA
  • Patent number: 8422235
    Abstract: The present invention provides a vehicle power module and a power converter including a power semiconductor element (328), a plurality of connecting conductors (371U, 372U, 373U) for transmitting current to the power semiconductor element (328), and a metallic base (304) upon which the power semiconductor element (328) and the plurality of connecting conductors (371U, 372U, and 373U) are mounted; and the power semiconductor element (328) and the plurality of connecting conductors (371U, 372U, and 373U) are mounted upon the metallic base (304) so as to form a looped current path. Desirably, the power semiconductor element (328) and the plurality of connecting conductors (371U, 372U, 373U) are arranged so as to form two or more looped current paths.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: April 16, 2013
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Katsunori Azuma, Mutsuhiro Mori, Kinya Nakatsu, Seiichi Hayakawa, Fusanori Nishikimi
  • Publication number: 20130088080
    Abstract: Systems, methods, and apparatus for providing a dynamic break and distortion filter. In one embodiment, an apparatus can include an inverter providing alternating current (AC) power at one of a first and second chopping frequency and a filter. The filter can include an input port receiving the AC power and an output port providing output power by selectively passing the AC power from the input port to the output port. The filter may further include an inductor electrically connected to one of the input port and output port and a capacitor electrically connected to the inductor and to a resistor, wherein current does not substantially flow through the inductor and capacitor at the first chopping frequency and does substantially flow through the inductor and capacitor at the second chopping frequency, and wherein the AC power with the second chopping frequency is dissipated in the resistor.
    Type: Application
    Filed: October 5, 2011
    Publication date: April 11, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: David Smith, Robert Gregory Wagoner
  • Publication number: 20130070505
    Abstract: An inverter controller comprising a current regulator unit, a voltage regulator unit coupled to the current regulator unit, an inverter unit coupled to the voltage regulator unit, and a drive unit controlled by the inverter unit.
    Type: Application
    Filed: September 19, 2011
    Publication date: March 21, 2013
    Applicant: DRS POWER & CONTROL TECHNOLOGIES, INC.
    Inventors: David J. Gritter, James Ulrich
  • Publication number: 20130051107
    Abstract: A multiphase DC voltage converter and a method for controlling a multiphase DC voltage converter, having at least two parallel coils which are controlled in a time-shifted manner, at least one control unit for activating the coils, and at least one magnetically sensitive sensor element for detecting a magnetic field generated by the current flow through the coils. The control unit controls the current flow through the coils as a function of an output signal of the at least one sensor element.
    Type: Application
    Filed: November 24, 2010
    Publication date: February 28, 2013
    Inventors: Rasmus Rettig, Werner Schiemann, Franziska Kalb
  • Publication number: 20120264486
    Abstract: Various embodiments relate to a base station element and related method of suppressing an alternating-current (AC) portion of a signal. A base station element includes a filter capable of lightning suppression through the use of an LC filter that suppresses an AC portion of a received signal while passing a DC portion of the signal. The LC filter includes a flat inductor disposed in a cavity of the base station. The flat inductor may be connected to other electrical components disposed in the cavity of the base station to complete the electrical circuit. In some embodiments, the flat inductor may be produced from one material through photo-etching and may also include snap in or snap on connectors on one or both ends to enable galvanic contact with other components like a tap pin or a printed circuit board (PCB) without requiring attachment through soldering.
    Type: Application
    Filed: April 18, 2011
    Publication date: October 18, 2012
    Applicant: RADIO FREQUENCY SYSTEMS INC.
    Inventors: Yunchi Zhang, Yin-Shing Chong, Jari M. Taskila
  • Patent number: 8274799
    Abstract: A resonant mode power converter is controlled with a control unit including a current limiting circuit coupled to receive a first current representative of a power converter output and a second current generated in response to a reference voltage. The current limiting circuit is coupled to limit the first current in response to the second current. An oscillator is coupled to receive the first current to generate a control signal having a control frequency in response to the first current. The power converter output is controlled in response to the control frequency of the control signal.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: September 25, 2012
    Assignee: Power Integrations, Inc.
    Inventors: Anthony Reinberger, Paul Demone
  • Patent number: 8258911
    Abstract: Disclosed herein are various embodiments of compact coil power transformers configured to provide high voltage isolation and high voltage breakdown performance characteristics in small packages. Compact coil transformers are provided across which power may be transmitted and received by primary and secondary coils disposed on opposing sides of a substrate without high voltage breakdowns occurring therebetween. At least portions of the compact coil transformer are formed of an electrically insulating, non-metallic, non-semiconductor, low dielectric loss material. The compact coil transformers may be formed in small packages using, by way of example, printed circuit boards, flex circuits, lead frames, CMOS and other fabrication and packaging processes.
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: September 4, 2012
    Assignee: Avago Technologies ECBU IP (Singapor) Pte. Ltd.
    Inventor: Julie E. Fouquet
  • Patent number: 8233301
    Abstract: An impedance dropping dc power supply having an impedance controlled converter whose impedance adaptively changes as a function of the power supply's load impedance, to maintain the ac voltage across the primary winding of its power transformer below a predetermined maximum level, and to minimize the waste heat generated by the power supply that would otherwise have to be dissipated.
    Type: Grant
    Filed: December 20, 2008
    Date of Patent: July 31, 2012
    Assignee: SensorLink Corporation
    Inventor: Zhijiang Guo
  • Publication number: 20120147564
    Abstract: An AC photovoltaic module includes a DC photovoltaic module for converting solar energy to DC electrical power, and an inverter for converting DC electrical power to AC electrical power, the inverter being adapted for connection to a frame portion of the module and being sized and configured, and provided with arrangements of electrical components thereof, to dispense heat from the inverter, whereby to prolong operational life and reliability of the inverter.
    Type: Application
    Filed: September 20, 2011
    Publication date: June 14, 2012
    Inventors: Miles Clayton Russell, Gregory Allen Kern, Ruel Davenport Little, Zachary Adam King
  • Publication number: 20110292687
    Abstract: A high voltage transformer for transforming electric power from a high voltage direct current source to a lower voltage direct current or to a lower voltage alternating current, without intermediate magnetic transformation. The transformer has a number of stages. Each stage includes capacitors and switching devices. There is a controller that controls the switching devices to change the polarity of one or more capacitors.
    Type: Application
    Filed: May 24, 2011
    Publication date: December 1, 2011
    Inventors: Lionel O. Barthold, Dennis A. Woodford
  • Patent number: 8014172
    Abstract: A resonant mode power converter is controlled with a control unit including a feedback circuit coupled to generate a first current representative of an output of the power converter. A current limiting circuit is coupled to receive the first current and a second current generated in response to a reference voltage. The current limiting circuit is coupled to limit the first current in response to the second current. An oscillator is coupled to receive the first current to generate a control signal having a control frequency in response to the first current. An output voltage of the power converter is controlled in response to the control frequency of the control signal.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: September 6, 2011
    Assignee: Power Integrations, Inc.
    Inventors: Anthony Reinberger, Paul Demone
  • Patent number: 7977819
    Abstract: Provided is a power converter having an inverter (13) wherein capacitors (12) are connected in parallel on a direct current side, and a power supply circuit configured to supply the inverter with a direct current from a power supply (1) and a power storage element (14). A controller using such power converter is also provided for electric rolling stocks. The power supply circuit is provided with a power supply switch (S1) arranged between the power supply and the inverter, a DC-to-DC converter (15A) arranged between the power storage element and the inverter, and a bypass switch (S2) arranged between the power storage element and the inverter.
    Type: Grant
    Filed: August 9, 2006
    Date of Patent: July 12, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventor: Hidetoshi Kitanaka
  • Patent number: 7956563
    Abstract: Systems and apparatus are provided for an inverter system for use in a vehicle having a first energy source and a second energy source. The inverter system comprises an electric motor having a first set of windings and a second set of windings. The inverter system further comprises a first inverter coupled to the first energy source and adapted to drive the electric motor, wherein the first set of windings are coupled to the first inverter. The inverter system also comprises a second inverter coupled to the second energy source and adapted to drive the electric motor, wherein the second set of windings are coupled to the second inverter. A controller is coupled to the first inverter and the second inverter to achieve desired power flow between the first energy source, the second energy source, and the electric motor.
    Type: Grant
    Filed: April 28, 2008
    Date of Patent: June 7, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Milun Perisic, Silva Hiti, Brian A. Welchko, Sibaprasad Chakrabarti, James M. Nagashima, Gregory S. Smith, George John
  • Publication number: 20110069518
    Abstract: Disclosed herein is the resonant inverter of a radio frequency (RF) generator for radiofrequency ablation (RFA). The resonant inverter of RF generator for RFA amplifies to high power an oscillation frequency output from an oscillator and provides the amplified oscillation frequency to an electrode. The resonant inverter processes the oscillation frequency output from the oscillator as a high-power sine wave having a frequency of 480 kHz and a Root Mean Square (RMS) power of 30 to 200 watts, and transfers the high-power sine wave to the electrode.
    Type: Application
    Filed: March 24, 2010
    Publication date: March 24, 2011
    Applicants: Taewoong Medical Co., Ltd., Kyong Min SHIN
    Inventors: Kyong-Min SHIN, Hong-chea Jung, Young-Jin Choi, Jun-hyok Lee, Jae-Bok Kim, Guk-joo Na, Kye-joo Kim
  • Patent number: 7889527
    Abstract: An electric power source in which a plurality of inverters operate on the same frequency and the plurality of inverters are connected in parallel so that a resistance value expressed by (1??·G)/(?·G) where ? is the output voltage feedback gain, ? is the output current feed forward gain, and G is the inverter current gain, is made to be the equivalent output impedance; and is an electrical power source in which the cross-current between the inverters are made to be an acceptable value or below by adjusting the output of each of the inverters by controlling the equivalent output impedance by modifying both or either one of the output voltage feedback gain ? or the output current feed forward gain ?.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: February 15, 2011
    Assignee: Origin Electric Company, Limited
    Inventors: Masaaki Ohshima, Shuuichi Ushiki, Jirou Fukui
  • Publication number: 20110026286
    Abstract: A transformer with power factor compensation and a DC/AC inverter constructed thereby are presented. The power factor compensation transformer includes a primary winding, a secondary winding, and a power factor compensation capacitor bank, while the secondary winding having a coupling winding and a power factor compensation winding. The primary winding connects to a power grid in parallel, the coupling winding connects to an AC output port of a passive trigger type DC/AC inverter, and the power factor compensation winding serially connects with the power factor compensation capacitor bank. Besides, a triggered switch serially connecting with the power factor compensation winding and power factor compensation capacitor bank is provided when an inductor with air gap links the passive trigger type DC/AC inverter and the coupling winding. Consequently, a function of power factor correction is achieved.
    Type: Application
    Filed: December 17, 2009
    Publication date: February 3, 2011
    Inventors: Wun-Chih LIU, Szu-Hsien LIU, Szu-Lin LIU
  • Patent number: 7848117
    Abstract: The switching frequency of an LLC converter is controlled by a control unit to which a feedback circuit provides a first current dependent upon the output voltage of the converter. An oscillator circuit produces a sawtooth waveform at a frequency dependent upon the first current, up to a limit equal to a second current set by a resistor. Two complementary switch control signals are produced for controlling two switches of the converter for conduction in alternate cycles of the sawtooth waveform. A timer produces dead times between the two complementary switch control signals in dependence upon the second current. Another resistor provides a current constituting a minimum value of the first current, and a charging current of a capacitor in series with a resistor modifies the first current for soft starting of the converter.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: December 7, 2010
    Assignee: Power Integrations, Inc.
    Inventors: Anthony Reinberger, Paul Demone
  • Publication number: 20090296438
    Abstract: A method and inverter (2, 27) for converting a DC input voltage supplied by a DC source (9), which is in particular a solar cell array, into a 3-phase AC output. For each phase (R, S, T) the DC input voltage is converted to a DC output voltage (DCR, DCS, DCT) with a specific waveform. The waveforms of the three DC output voltages are identical, shifted in time by 120° to each other and they are such that by subtracting any two of them a sinusoidal waveform is obtained. The waveform of each DC output voltage may comprise a first portion of ? or 120° of the AC output cycle with an amplitude of zero and a subsequent second portion of ? or 240° of the AC output cycle during which the DC output voltage has a non-zero amplitude.
    Type: Application
    Filed: January 23, 2006
    Publication date: December 3, 2009
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
    Inventor: Ulrich Boeke
  • Patent number: 7602627
    Abstract: The present invention is an electric power source in which a plurality of inverters operate on the same frequency and the plurality of inverters are connected in parallel so that a resistance value expressed by (1??·G)/(?·G) where ? is the output voltage feedback gain, ? is the output current feed forward gain, and G is the inverter current gain, is made to be the equivalent output impedance; and is an electrical power source in which the cross-current between the inverters are made to be an acceptable value or below by adjusting the output of each of the inverters by controlling the equivalent output impedance by modifying both or either one of the output voltage feedback gain ? or the output current feed forward gain ?.
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: October 13, 2009
    Assignee: Origin Electric Company, Limited.
    Inventors: Masaaki Ohshima, Shuuichi Ushiki, Jirou Fukui
  • Publication number: 20090033254
    Abstract: A double ended inverter system for an AC traction motor of a vehicle includes a fuel cell configured to provide a DC voltage, an impedance source inverter subsystem coupled to the fuel cell, a DC voltage source, and an inverter subsystem coupled to the DC voltage source. The impedance source inverter subsystem, which includes an ultracapacitor, is configured to drive the AC traction motor. The inverter subsystem is configured to drive the AC electric traction motor. The ultracapacitor is implemented in a crossed LC network coupled to the fuel cell.
    Type: Application
    Filed: June 3, 2008
    Publication date: February 5, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: James M. NAGASHIMA, Brian A. WELCHKO, Sibaprasad CHAKRABARTI, Milun PERISIC, Gregory S. SMITH, George JOHN
  • Publication number: 20080116819
    Abstract: A liquid crystal display device includes a liquid crystal display panel, a lamp disposed behind the liquid crystal display panel, a cover accommodating the lamp, and an inverter disposed behind the cover. The inverter includes a substrate and a transformer mounted on the substrate and driving the lamp. The transformer includes a core and a coil that is wound around at least a part of the core. The liquid crystal display panel further includes a transformer cover which covers the coil, an inverter cover which covers the inverter and the transformer cover, and a metal member in the transformer cover.
    Type: Application
    Filed: October 31, 2007
    Publication date: May 22, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Yun-gun LEE, Moon-shik KANG, Min-soo CHOI
  • Patent number: 7130205
    Abstract: An impedance source power converter includes a power source, a main converter circuit and an impedance network. The main converter circuit is coupled to a load and the impedance network couples the power source to the main converter circuit. The impedance network is configured such that the main converter circuit is adapted to perform both buck conversion and boost conversion.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: October 31, 2006
    Assignee: Michigan State University
    Inventor: Fang Z. Peng
  • Patent number: 6914794
    Abstract: A low cost power conversion device operating at a high frequency with high efficiency is realized by using semiconductor switching devices such as FETs being inexpensive and having low withstand voltages and low forward voltage drops. A second error signal obtained by comparing the voltages across two input capacitors connected between both ends of a DC input power supply is subtracted/added from/to a first error signal obtained from a voltage corresponding to a combined DC output of rectifying circuits and the voltage corresponding to a predetermined reference power. Based on the resultant signals, the voltage of a control signal supplied to an inverter circuit in which the voltage across an input capacitor is higher is increased, while the voltage of a control signal supplied to another inverter circuit in which the voltage across another input capacitor is lower is decreased, thereby balancing the voltages across the input capacitors.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: July 5, 2005
    Assignee: Origin Electric Company, Limited
    Inventors: Kiyomi Watanabe, Teruo Tomaki
  • Patent number: 6667667
    Abstract: A method for driving at least one inductive load using pulse width modulated control signals, via a PWM control unit, the control pulses of the PWM control signals connecting the load to and disconnecting it from a d.c. supply voltage via a semiconductor output stage. To prevent the formation of an a.c. voltage occurring on the d.c. supply voltage in the case of pulse-wise loading of the same by the PWM control signal, the PWM control unit is assignable a supplementary device including a storage capacitor and/or storage inductor having a semiconductor switch, and the semiconductor switch is controllable by the PWM control unit switch on one charging current circuit powered by the d.c. supply voltage for the storage capacitor and/or the storage inductor.
    Type: Grant
    Filed: April 18, 2002
    Date of Patent: December 23, 2003
    Assignee: Robert Bosch GmbH
    Inventors: Harald Witzig, Gerhard Knecht, Thomas Heese
  • Patent number: 5986907
    Abstract: A method of transferring energy from a power source into an output node including the steps of separately charging each of a plurality of energy storage elements from the power source; after the plurality of energy storage elements are charged, discharging a selected one of the energy storage elements through an inductive element into the output node; and as the selected energy storage element is being discharged through the inductive element, when its voltage reaches a preselected value, discharging another one of the energy storage elements through the inductive element into the output node.
    Type: Grant
    Filed: April 1, 1998
    Date of Patent: November 16, 1999
    Inventor: Rudolf Limpaecher
  • Patent number: 5905371
    Abstract: A method of transferring energy from a power source into an output node including the steps of separately charging each of a plurality of energy storage elements from the power source; after the plurality of energy storage elements are charged, discharging a selected one of the energy storage elements through an inductive element into the output node; and as the selected energy storage element is being discharged through the inductive element, when its voltage reaches a preselected value, discharging another one of the energy storage elements through the inductive element into the output node.
    Type: Grant
    Filed: June 23, 1995
    Date of Patent: May 18, 1999
    Assignee: D.C. Transformation, Inc.
    Inventor: Rudolf Limpaecher
  • Patent number: 5880946
    Abstract: A magnetically variable transformer having primary and secondary windings wound on a magnetic core wherein the transformer core with associated windings is placed in close proximity to an independently wound control coil. The control coil is positioned in one configuration on a focusing armature whose poles straddle the transformer core at positions on opposing sides. In a second configuration the transformer core is placed within the bore of the control coil and an optional focusing armature concentrates the magnetic field at the poles. Application of a control current forms poles at the control coil extremities and causes a change in permeability of the transformer core thereby altering the power output of the transformer inversely to the magnitude of the control current. The magnetically variable transformer controls a D.C. to A.C. inverter circuit which is useful in supplying power to a fluorescent lamp and other A.C. receptive loads. Additionally, a derived D.C.
    Type: Grant
    Filed: December 29, 1997
    Date of Patent: March 9, 1999
    Inventor: George Biegel
  • Patent number: 5870291
    Abstract: An asymmetrical half-bridge converter, a method of operating the same and a power supply that incorporates either the converter or the method. In one embodiment, the converter includes: (1) a power transformer that receives asymmetrical AC input power into a primary winding thereof via an input capacitor, the asymmetrical AC input power inducing a DC bias current in a secondary winding of the power transformer and (2) first and second serially-coupled output inductors coupled across the secondary winding and having parasitic resistances associated therewith that are independently selectable to attenuate the DC bias circuit in the secondary winding.
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: February 9, 1999
    Assignee: Lucent Technologies Inc.
    Inventors: Richard W. Farrington, Mark E. Jacobs, Rui Liu