For Inverters Patents (Class 363/55)
  • Patent number: 8026639
    Abstract: A step wave power converter includes a plurality of transformers each configured to receive a Direct Current (DC) voltage from one or more independently generated power sources. Each transformer comprising a primary winding and a secondary winding. A plurality of bridge circuits control different DC voltage inputs from one of the multiple independently generated power sources into the primary windings. One or more processors are configured to use a Phase-Shifted Carrier Pulse Width Modulation (PSCPWM) scheme to operate the bridge circuits in order to produce steps for a step wave Alternating Current (AC) output from the secondary windings.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: September 27, 2011
    Assignee: Sustainable Energy Technologies
    Inventors: Rishi Sachdeva, Russell Jack Morash, Dubravko Bosnjak, Brent Earle Harris
  • 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: 7990098
    Abstract: Systems and apparatus are provided for an inverter system for use in a vehicle. The inverter system comprises a six-phase motor having a first set of three-phase windings and a second set of three-phase windings and a three-phase motor having a third set of three-phase windings, wherein the third set of three-phase windings is coupled to the first set of three-phase windings and the second set of three-phase windings. The system further comprises a first energy source coupled to a first inverter adapted to drive the six-phase motor and the three-phase motor, wherein the first set of three-phase windings is coupled to the first inverter, and a second energy source coupled to a second inverter adapted to drive the six-phase motor and the three-phase motor, wherein the second set of three-phase windings is coupled to the second inverter. A controller is coupled to the first inverter and the second inverter.
    Type: Grant
    Filed: May 1, 2008
    Date of Patent: August 2, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Milun Perisic, Silva Hiti, Gregory S. Smith, James M. Nagashima, George John, Sibaprasad Chakrabarti, Brian A. Welchko
  • Publication number: 20110176342
    Abstract: A converter device (for power conversion in e.g. a power plant such as a wind turbine is disclosed. An individual controller is provided for each phase of an electrical output power of the converter. If a voltage of one phase is indicated as being out of a predetermined voltage band, an active current of this phase is set to zero and optionally a reactive component of this phase is set to a value that depends on the indicated voltage.
    Type: Application
    Filed: January 13, 2011
    Publication date: July 21, 2011
    Inventors: Björn Andresen, Steffen Wulff
  • Patent number: 7978487
    Abstract: A switching power supply includes an energy-storing device, a power switch, a driving circuit and a thermal sensing device. The energy-storing device is coupled to an input power source and controlled by the power switch to increase or decrease the power therein. The power switch has a control terminal connected to the driving circuit for switching. The thermal sensing device is connected to the control terminal of the power switch and powered by the driving circuit. When sensing an operation temperature exceeding a predetermined range, the thermal sensing device disables the driving circuit.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: July 12, 2011
    Assignee: Leadtrend Technology Corp.
    Inventor: Chien-Liang Lin
  • Publication number: 20110134667
    Abstract: The invention relates to a method for controlling a converter having at least two phase modules (100) that comprise an upper and a lower valve branch (T1, . . . , T6), each of which is equipped with at least three bipolar systems (10) connected in series, in case at least one subsystem (10) of a valve branch (T1, . . . , T6) fails. In said method, the valve branch (T1, . . . , T6) having the disturbed subsystem (10) is determined, and one subsystem (10) of a valve branch (T1, . . . , T6) of each undisturbed phase module (100) is controlled such that the terminal voltages (UX21) of said subsystems (10) amounts to zero, said valve branch (T1, . . . , T6) of each undisturbed phase module (100) corresponding to the disturbed valve branch (T1, . . . , T6). According to the invention, a subsystem (10) of a valve branch (T1, . . . , T6) of the disturbed phase module (100) is controlled such that the terminal voltage (UX21) thereof equals zero, said valve branch (T1, . . .
    Type: Application
    Filed: May 14, 2009
    Publication date: June 9, 2011
    Applicant: Siemens Aktiengesellschaft
    Inventors: Marc Hiller, Dietmar Krug
  • Publication number: 20110134666
    Abstract: An inverter having three phase modules with an upper valve arm and a lower valve arm having each at least three two-pole subsystems connected in series, which each subsystem having a storage capacitor, is controlled in the event of failure of one or more subsystems by setting the terminal voltage of the failed subsystems permanently to zero, setting the terminal voltage of a corresponding number of fault-free subsystems in corresponding fault-free valve branches likewise to zero, and increasing the capacitor voltages of the fault-free subsystems of the failed valve branches such that their sum is equal to the sum of the capacitor voltages of the subsystems of a corresponding fault-free valve branch, while leaving the control of the fault-free phase modules unchanged. In this way, a symmetrical voltage system with maximum amplitude is obtained at the inverter outputs.
    Type: Application
    Filed: May 14, 2009
    Publication date: June 9, 2011
    Applicant: Siemens Aktiengesellschaft
    Inventors: Marc Hiller, Dietmar Krug
  • Patent number: 7906933
    Abstract: An induction motor drive includes a plurality of inverters, a changeover switch which changes over outputs of the plurality of inverters to be supplied to one induction motor and a changeover controller which controls the changeover switch on the basis of a failure detection signal of one inverter to change over from the one inverter to another inverter to start the other inverter so that the induction motor is driven. The changeover controller includes a frequency/phase detector which always detects a frequency and a phase of a terminal voltage of the induction motor and a starting frequency/phase setting device which controls a frequency and a phase at starting of the other inverter in accordance with detected values of the frequency/phase detector when the failure signal is inputted.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: March 15, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Daisuke Tan, Hirohisa Satomi, Shigetoshi Okamatsu, Koichi Miyazaki
  • Patent number: 7881078
    Abstract: A device for transmitting electric power between alternating voltage networks includes converters interconnected by direct current lines and provided each with several six-pulse conversion bridges. The six-pulse conversion bridges of one same converter are capable of being connected to an alternating voltage network associated with the converters via inductances differently phase-shifted. A control unit is provided to energize the valves of the six-pulse conversion bridges. The device is more economical and the converters are interconnected by a plurality of direct current circuits, each direct current circuit being galvanically separated from at least an alternating voltage network.
    Type: Grant
    Filed: March 6, 2006
    Date of Patent: February 1, 2011
    Assignee: Siemens AG
    Inventors: Marcos Pereira, Kadry Sadek
  • Patent number: 7868595
    Abstract: A regulator is provided. The regulator is a PWM-based switching regulator with soft-start. The regulator starts up with non-synchronously-rectified regulation. A soft-start done signal is asserted after soft-start is finished. In one embodiment, the soft-start done signal is asserted at about 150% of the soft-start time. After the soft-start done signal has been asserted, the regulator changes from non-synchronously-rectified regulation to synchronously-rectified regulation if a pre-determined period of time occurs with no zero-crossing in the inductor current. In one embodiment, the pre-determined period of time is one switching cycle. In some embodiments, the “zero-crossing” of the inductor current is slightly different from zero, such as ?0.5 A.
    Type: Grant
    Filed: June 17, 2008
    Date of Patent: January 11, 2011
    Assignee: National Semiconductor Corporation
    Inventor: Gregory J. Smith
  • Patent number: 7843710
    Abstract: A power converter controlling apparatus that can prevent burnout caused by overcurrent and/or overvoltage generated by low power index operation or output short circuit in a high frequency power converter employing a digital controlling method, and a method thereof. The power converter controlling apparatus includes a digital controller which outputs a gate signal for controlling intermittent operation of a predetermined switch based on inputted control data, a detector which generates a detection signal in response to generation of overcurrent and/or overvoltage, and a registration maintenance unit for maintaining a state where the output of the gate signal is shut off, when the detection signal is generated.
    Type: Grant
    Filed: November 2, 2009
    Date of Patent: November 30, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin-ha Kim, Joong-gi Kwon, Young-min Chae
  • Patent number: 7839665
    Abstract: A system interconnection inverter includes a step-up converter and an inverter. Moreover, the system interconnection inverter includes a short-circuit current-interrupting diode with a cathode connected to an input terminal of a negative bus, a semiconductor switch connected to an anode of the short-circuit current-interrupting diode, a semiconductor switch drive circuit that drives the semiconductor switch, a semiconductor switch-off circuit that turns off the semiconductor switch drive circuit when negative power is applied such that electric current flows from a cathode toward an anode of the input terminal, and a control circuit that controls the semiconductor switch drive circuit.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: November 23, 2010
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masahiro Toba, Noriyuki Matsubara, Masanori Kageyama, Hirokazu Nakabayashi
  • Patent number: 7808125
    Abstract: A step wave power converter includes a plurality of transformers each configured to receive a Direct Current (DC) voltage from one or more independently generated power sources. Each transformer comprising a primary winding and a secondary winding. A plurality of bridge circuits control different DC voltage inputs from one of the multiple independently generated power sources into the primary windings. One or more processors are configured to use a Phase-Shifted Carrier Pulse Width Modulation (PSCPWM) scheme to operate the bridge circuits in order to produce steps for a step wave Alternating Current (AC) output from the secondary windings.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: October 5, 2010
    Assignee: Sustainable Energy Technologies
    Inventors: Rishi Sachdeva, Russell Jack Morash, Dubravko Bosnjak, Brent Earle Harris
  • Patent number: 7782640
    Abstract: An inverter circuit according to an embodiment includes an input unit to which a first voltage is applied. In the inverter circuit, a transformer transforms the first voltage output from the input unit, and a first switching unit switches an on/off state of the transformer. An inverter controller controls an operation of the first switching unit, and an output unit of the inverter circuit outputs a second voltage output from the transformer. A feedback unit detects an electrical signal from the transformer and supplies the detected electrical signal to the inverter controller, and an initial operation controller controls an intensity of the electrical signal supplied to the inverter controller from the feedback unit.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: August 24, 2010
    Assignee: LG Innotek Co., Ltd.
    Inventor: Chang Sun Yun
  • Publication number: 20100195357
    Abstract: A method and apparatus for determining a corrected monitoring voltage, at least a portion of the method being performed by a computing system comprising at least one processor. The method comprises generating power at a first location; monitoring the generated power by measuring a first voltage proximate the first location; measuring a second voltage proximate a second location, the first and the second locations electrically coupled; and determining, based on the measured second voltage, a corrected monitoring voltage to compensate the measured first voltage for a distance between the first and the second locations.
    Type: Application
    Filed: February 5, 2010
    Publication date: August 5, 2010
    Applicant: ENPHASE ENERGY, INC.
    Inventors: MARTIN FORNAGE, MARV DARGATZ
  • Patent number: 7751207
    Abstract: Proposed is a power semiconductor module with a housing and one or a plurality of half-bridge circuitries arranged therein. Each half-bridge circuitry has a first (TOP) and a second (BOT) power switch and each switch is comprised of one power transistor and a corresponding power diode (recovery diode). The power semiconductor module furthermore has a positive polarity direct current lead and a negative polarity direct current lead. Per each half-bridge circuitry it furthermore has two alternate current leads that are not directly connected electrically. Each TOP transistor is connected to the power diode of the BOT switch and a first alternate current lead and each BOT transistor is connected to the power diode of the TOP switch and a second alternate current lead.
    Type: Grant
    Filed: December 8, 2005
    Date of Patent: July 6, 2010
    Assignee: Semikron Elektronik GmbH & Co. KG
    Inventors: Dejan Schreiber, Heinrich Heilbronner
  • Patent number: 7733616
    Abstract: Each of three-phase arm of an inverter has first and second switching elements connected in series together at a connection point to the corresponding phase coil of the three-phase motor. Control device turns on the first switching element of the i-th (i is a natural number smaller than four) for a predetermined time period, and determines that the second switching element of the i-th arm has a short fault, when an overcurrent exceeding a predetermined threshold is detected within the predetermined time period. The predetermined time period is shorter than a time period from a time point of turning on the first switching element of the i-th arm to a time point of attaining the predetermined threshold by a current flowing through a path extending from a power supply line through the second switching element of the remaining arm other than the i-th arm to a ground line.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: June 8, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Kenji Yamada
  • Patent number: 7733048
    Abstract: Method and arrangement in connection with a motor fed with a frequency converter provided with an intermediate voltage circuit. The method comprises steps of feeding motor voltage to the motor along a motor cable with a frequency converter for controlling the motor, rectifying the voltage of the motor cable and restricting the magnitude of the voltage of the motor cable at the end of the motor cable on the side of the motor with a clipper circuit coupled in parallel with the motor, using the rectified voltage for rotating one or more cooling fans of the motor.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: June 8, 2010
    Assignee: ABB Oy
    Inventor: Erkki Miettinen
  • Patent number: 7724550
    Abstract: The invention relates to an electronic device (5) in the form of a flexible multilayer film body, in particular an RFID transponder, and to a rectifier (52) for such an electronic device. The rectifier (52) has at least two organic diodes or organic field effect transistors each having at least one electrical functional layer composed of a semiconducting organic material. The rectifier (52) furthermore has two or more charging or charge-reversal capacitors which are connected up to the two or more organic diodes or organic field effect transistors in such a way that the charging or charge-reversal capacitors can be charged via different current paths.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: May 25, 2010
    Assignee: PolyIC GmbH & Co. KG
    Inventors: Markus Bohm, Dietmar Zipperer, Andreas Ullmann, Markus Lorenz
  • Patent number: 7706157
    Abstract: An exemplary embodiment includes a method for balancing thyristor bridge circuits, the method comprising, determining currents of thyristors in a first leg of thyristors of a thyristor bridge circuit, determining a first set of gate firing times for the thyristors in the first leg of thyristors responsive to determining the current of the thyristors in the first gate of thyristors, wherein the first set of gate firing times are operative to balance a current load between the thyristors in the first leg of thyristors, and gating the thyristors in the first leg of thyristors according to the first set of gate firing times.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: April 27, 2010
    Assignee: General Electric Company
    Inventors: William Robert Pearson, Pedro Monclova
  • Publication number: 20100089670
    Abstract: The present invention provides an inverter circuit for a vehicle, which includes: a switching unit that includes a plurality of switching elements and switches a direct current into an alternating current; and a variable clamping unit that clamps an overshoot in case the overshoot is generated, and stops the operation of the switching unit in case a system voltage is greater than a clamping breakdown voltage. The circuit enables a voltage (DC input voltage) greater than a breakdown voltage of clamping unit to be used as a system voltage.
    Type: Application
    Filed: October 15, 2009
    Publication date: April 15, 2010
    Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Jeong Yun Lee, Sung Kyu Kim, Jae Won Lee, Tae Hwan Chung, Ki Young Jang, Jung Hong Joo
  • Publication number: 20100046257
    Abstract: A power converter controlling apparatus that can prevent burnout caused by overcurrent and/or overvoltage generated by low power index operation or output short circuit in a high frequency power converter employing a digital controlling method, and a method thereof. The power converter controlling apparatus includes a digital controller which outputs a gate signal for controlling intermittent operation of a predetermined switch based on inputted control data, a detector which generates a detection signal in response to generation of overcurrent and/or overvoltage, and a registration maintenance unit for maintaining a state where the output of the gate signal is shut off, when the detection signal is generated.
    Type: Application
    Filed: November 2, 2009
    Publication date: February 25, 2010
    Inventors: Jin-ha Kim, Joong-gi Kwon, Young-min Chae
  • Patent number: 7667990
    Abstract: An architecture for switching on and off power, which applies to a power supply has a power factor regulation unit, a primary power system, and a regular power system. The regular power system provides the primary power system with a regular power to start the primary power system. The regular power system includes: a voltage detection unit generating a driving signal signifying and a regular power output unit receiving the driving signal and outputting the regular power. The voltage detection unit connects with a logic signal switch. The logic signal switch controls the voltage detection unit to determine whether the driving signal is normally output to the regular power output unit or coercively interrupted. Thereby, the power supply can be coercively switched off. As the driving signal has a smaller current, the liability of electric shock is decreased, and the volume and cost of the logic signal switch is reduced.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: February 23, 2010
    Assignee: Andyson International Co., Ltd.
    Inventor: Che-Chia Liu
  • Publication number: 20100020576
    Abstract: A power converter circuitry for converting a DC voltage generated by a generator with varying output power in the mean voltage range into an alternating voltage for feeding into a grid, with several series-connected power converters, which are connected in parallel with said generator, as well as with a controllable bridging switch for each power converter, said bridging switch lying in a direct voltage intermediate circuit and bridging the respective power converter in the closed condition, is intended to be used for a photovoltaic generator. This is achieved in that a resistance chopper is connected between each power converter and the generator, no input diode being provided in the current path from the generator to the power converter, and that each bridging switch is connected in parallel with the resistance chopper in the direct voltage intermediate circuit.
    Type: Application
    Filed: July 16, 2009
    Publication date: January 28, 2010
    Applicant: SMA SOLAR TECHNOLOGY AG
    Inventor: Andreas FALK
  • Patent number: 7649724
    Abstract: In a protective circuit for a converter having a plurality of phases, for each phase current of the phases, a signal proportional to the respective phase current is applied to a transformer circuit that, below and in the area of a limiting frequency, functions as a low-pass filter with the limiting frequency, and above the limiting frequency, functions as a divider. The outputs of the transformer circuit are applied to a maximum generator for forming the absolute value maximum. This maximum is fed to a comparator in which the maximum is compared to a reference value.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: January 19, 2010
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventor: Norbert Huber
  • Patent number: 7646619
    Abstract: A power converter controlling apparatus that can prevent burnout caused by overcurrent and/or overvoltage generated by low power index operation or output short circuit in a high frequency power converter employing a digital controlling method, and a method thereof. The power converter controlling apparatus includes a digital controller which outputs a gate signal for controlling intermittent operation of a predetermined switch based on inputted control data, a detector which generates a detection signal in response to generation of overcurrent and/or overvoltage, and a registration maintenance unit for maintaining a state where the output of the gate signal is shut off, when the detection signal is generated.
    Type: Grant
    Filed: January 24, 2006
    Date of Patent: January 12, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin-ha Kim, Joong-gi Kwon, Young-min Chae
  • Publication number: 20090296430
    Abstract: The device for precharging a voltage converter (15) is provided with a precharging unit (3) capable of assuming a closed state, as well as with a control unit (4) for the said precharging unit (3), the said precharging unit (3) being capable of operating according to a precharging state limiting the value of the precharging current passing through it, the said control unit (4) being capable of commanding the operation of the precharging unit (3) according to the precharging state and, once the said precharging has been completed, of commanding the said precharging unit (3) to change over from the precharging state to the closed state. The assembly has a chopping voltage converter (15) and such a device disposed at the input of the said converter (15). The aircraft is equipped with such a device or with such an assembly.
    Type: Application
    Filed: May 27, 2009
    Publication date: December 3, 2009
    Applicant: Airbus France
    Inventors: Olivier RIEUX-LOPEZ, Olivier Goguet
  • Publication number: 20090284998
    Abstract: A method for providing a maximum power point tracking (MPPT) process for an energy generating device is provided. The method includes coupling a local converter to the energy generating device. A determination is made regarding whether the local converter is operating at or below a maximum acceptable temperature. A determination is made regarding whether at least one current associated with the local converter is acceptable. When the local converter is determined to be operating at or below the maximum acceptable temperature and when the at least one current associated with the local converter is determined to be acceptable, the MPPT process is enabled within the local converter.
    Type: Application
    Filed: June 23, 2009
    Publication date: November 19, 2009
    Applicant: National Semiconductor Corporation
    Inventors: Jianhui Zhang, Ali Djabbari, Gianpaolo Lisi
  • Patent number: 7616460
    Abstract: An alternating current (AC) bus malfunction detection and protection module monitors an AC voltage that is provided on a bus by a house keeping power supply of a power system. If the AC voltage on the bus falls below a first level, the module provides a delay before power inverter switching is disabled. If the AC voltage on the bus falls below a second level, the module disables the power inverter switching without delay.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: November 10, 2009
    Assignee: Continental Automotive Systems US, Inc.
    Inventor: Fengtai Huang
  • Publication number: 20090273954
    Abstract: Among many embodiments, a power converter and a method for operating a power converter are disclosed. The power converter may include a pair of switches connected in series, an output transformer connected to a common node between the switches and a protection apparatus for protecting each switch from being hard driven, each switch being enabled by a gate signal and turning ON in alternating half cycles so as to drive transformer current in alternate directions through the transformer. The protection apparatus may include: a detector configured to detect whether an intrinsic diode in a first switch is conducting the transformer current; and a gate signal disabler configured in response to the detector blocking an ON gate pulse from reaching a second switch in the pair of switches so that the second switch is not turned ON while the intrinsic diode of the first switch is conducting.
    Type: Application
    Filed: May 2, 2008
    Publication date: November 5, 2009
    Inventor: Hendrik V. Walde
  • Publication number: 20090244938
    Abstract: A switching apparatus for grounding an inverter (3) that converts a direct current voltage into an alternative current voltage at mains frequency, with an inverter housing (7) and with a safety fuse (8) that connects a positive or a negative direct current voltage to a grounding terminal, is intended to be provided such that a technician has the possibility of grounding an inverter appliance optionally positively or negatively at little expense, with the possibility for an IP-65 region of the appliance to remain closed. This is achieved in that a safety fuse (8), which is accessible and can be plugged from the outside, is arranged on said inverter housing (7) and can be contacted optionally to a positive or a negative direct current voltage in such a manner that either a positive or a negative direct current voltage is grounded through said safety fuse (8).
    Type: Application
    Filed: February 12, 2009
    Publication date: October 1, 2009
    Applicant: SMA Solar Technology AG
    Inventor: Bernd Gebert
  • Patent number: 7577003
    Abstract: A switching power source is capable of conducting constant-current drooping control on a load, increasing an energy conversion efficiency on a secondary side, and improving heat radiation performance. The switching power source detects whether or not an overcurrent exceeding a reference value V6 is passed to a switching element Q1, switches a first constant current I3 and a second constant current I4 smaller than the first constant current I3 from one to another according to a result of the overcurrent detection, directly superposes the first constant current I3 on a feedback voltage V3 at an input part, superposes the second constant current I4 on an output part where the feedback voltage is converted to have an impedance lower than that at the input part, and controls the ON-period of a pulse signal supplied to the switching element Q1 according to a resultant feedback voltage, thereby achieving constant-current drooping control on a load 29.
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: August 18, 2009
    Assignee: Sanken Electric Co., Ltd.
    Inventor: Masaru Nakamura
  • Patent number: 7577005
    Abstract: The invention relates to a method for recognizing the operational state of a load (10) connected to the output (6, 7) of an island inverter (1). A load recognition signal (SL) is applied at specific moments in time to the output (6, 7) of the island inverter (1), during which specific electric parameters are measured on the island inverter (1), enabling the operational state of the load (10) to be determined, wherein the island inverter (1), when the load (10) is activated, is switched from a possible standby mode into a permanent operation mode and, when the load is deactivated (10), the island inverter is switched from a possible permanent operation mode to a standby mode. The invention also relates to an island inverter (1). In order to ensure reliable recognition of all possible collected loads (10), a load recognition signal (SL) with parameters (T, d, A, H, f) that are modified at least according to the type of load (10) is applied to the output (6, 7) of the island inverter (1).
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: August 18, 2009
    Assignee: Fronius International GmbH
    Inventors: Christian Angerer, Hannes Heigl, Harald Kreuzer, Christoph Wolf
  • Patent number: 7570502
    Abstract: A problem to be solved by the present invention is to eliminate variation in potential in a turn-off time period of each GTO element, and to stabilize a gate drawing current by surely performing the turn-off of the GTO element. In an inverter apparatus having a three-phase inverter configured to include paired GTO elements an inverter control portion has a simultaneous switching prevention function of delaying a turn-on operation of each of the GTO elements which correspond to phases other than a phase corresponding to an optional one of the GTO elements and also correspond to an electrode opposite to an electrode corresponding to the optional one of the GTO elements by a predetermined time in a case where a turn-on command signal for turning on each of the GTO elements is generated within a predetermined time period since the turn-off of the optional one of the GTO elements.
    Type: Grant
    Filed: July 23, 2004
    Date of Patent: August 4, 2009
    Assignees: The Kansai Electric Power Co., Inc., Nissin Electric Co., Ltd.
    Inventors: Yoshitaka Sugawara, Katsunori Asano, Mitsuru Matsukawa, Yoshifumi Minowa, Toshihiko Shikata
  • Publication number: 20090190380
    Abstract: A multi-stage power supply uses a boost stage and an inverter stage to boost the voltage value of a DC power supply to a desired level, and then convert the power into an AC form. The multi-stage power supply additionally has a controller which can simultaneously control the boost stage and the inverter stage using counter-synchronous signals.
    Type: Application
    Filed: January 26, 2009
    Publication date: July 30, 2009
    Inventors: Kirk Nangreaves, Charles-Lizhi Zhu, Richard Joseph Hampo
  • Publication number: 20090185105
    Abstract: A DC/AC inverter substrate includes a voltage abnormality detector circuit. All of a high voltage side detection sensor, a low voltage side detection sensor, and a high-voltage and low-voltage detection sensor in the voltage abnormality detector circuit are disposed without being electrically connected to a secondary side of a transformer or to a connection point. Those detection sensors are not damaged since overvoltage is not applied to the voltage abnormality detector circuit when abnormal discharge occurs because the detection sensors are not electrically connected.
    Type: Application
    Filed: August 29, 2008
    Publication date: July 23, 2009
    Applicant: NEC LCD TECHNOLOGIES, LTD.
    Inventor: Yuuichi HASEGAWA
  • Patent number: 7561449
    Abstract: A DC-AC converter for converting DC voltage to AC voltage. The converter includes a conversion circuit for converting DC voltage to voltage having a polarity corresponding to AC voltage. A filter circuit receives the converted voltage, smoothes the converted voltage, and outputs the smoothed voltage as AC voltage. A first switch operably connects the voltage conversion circuit and filter circuit. A second switch is arranged between input terminals of the filter circuit. An output current detection circuit detects overcurrent that is greater than a predetermined first threshold. When overcurrent that is greater than the first threshold is detected, the protection circuit stops the supply of power in the voltage conversion circuit, deactivates the first switch, and activates the second switch.
    Type: Grant
    Filed: August 10, 2007
    Date of Patent: July 14, 2009
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Sadanori Suzuki, Hiroaki Asano, Kiminori Ozaki, Yusuke Yamamoto, Takahiro Suzuki
  • Patent number: 7558086
    Abstract: An inverter control circuit with a resonant frequency modulation function provides a control circuit module that can modulate different resonant frequencies externally to fit loads of different modes without changing the inverter components such as a voltage transformer or redesigning the circuit layout. The RC oscillation circuit of a resonant frequency controller of the invention includes several separate resistors, and the separate resistors of the RC oscillation circuit are coupled to at least one switcher to form an open circuit or a closed circuit to determine the total resistance of the RC oscillation circuit for modulating different resonant frequencies.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: July 7, 2009
    Assignee: Zippy Technology Corp.
    Inventor: Ying-Chang Cheng
  • Publication number: 20090168470
    Abstract: Fault-sensing and protecting apparatus for soft start circuit of inverter and method for the same are proposed. The soft start circuit of inverter includes a soft-starting resistor and a relay. The relay has a normally-open end connected to the soft-starting resistor in parallel. The fault-sensing and protecting apparatus for soft start circuit includes a central processing unit (CPU) and a photo coupler. The CPU is electrically connected to the inverter and an input end of the relay, respectively. The photo coupler includes a light emitting diode (LED) and a photo transistor. The LED is first electrically connected to a resistor in series and then electrically connected to the soft-starting resistor in parallel. The photo transistor is electrically connected to CPU. After the inverter starts to work, the CPU cuts out voltage applied to the inverter if the LED is lit. Therefore, the inverter can be prevented from damage.
    Type: Application
    Filed: December 28, 2007
    Publication date: July 2, 2009
    Inventor: Yu-Fang CHEN
  • Publication number: 20090141522
    Abstract: A protection method in a distributed power system including of DC power sources and multiple power modules which include inputs coupled to the DC power sources. The power modules include outputs coupled in series with one or more other power modules to form a serial string. An inverter is coupled to the serial string. The inverter converts power input from the string and produces output power. When the inverter stops production of the output power, each of the power modules is shut down and thereby the power input to the inverter is ceased.
    Type: Application
    Filed: December 4, 2008
    Publication date: June 4, 2009
    Applicant: SOLAREDGE, LTD.
    Inventors: Meir Adest, Guy Sella, Lior Handelsman, Yoav Galin, Amir Fishelov, Meir Gazit
  • Patent number: 7542313
    Abstract: An induction heating apparatus capable of stably operating at least one switching element contained therein is provided with a control circuit 5 which comprises a resonance waveform detector 6 for detecting a high frequency AC waveform supplied from an inverter circuit 3 to a heating coil 4 to produce a detection signal DS1 corresponding to high frequency AC power waveform; a phase comparator 8 for producing an adjusting signal PH corresponding to a phase difference between detection signal DS1 from resonance waveform detector 6 and drive signal D1 from drive circuit 7; and an addition circuit 13 for superimposing the drive signal D1 from drive circuit 7 on detection signal DS1 from resonance waveform detector 6 to supply to phase comparator 8the superimposed signal on a level same as or over operation threshold value VTH for the phase comparator 8.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: June 2, 2009
    Assignee: Sanken Electric Co., Ltd.
    Inventor: Shohei Osaka
  • Patent number: 7515443
    Abstract: An inverter circuit is configured with a reduced number of components for driving a plurality of discharge tubes. Primary coils of a plurality of drive transformers are respectively connected in series to primary coils of corresponding balancer-transformers, and then connected between output terminals of a switching circuit in parallel. The secondary coils of the balancer-transformers are connected in series, and connected between the output terminals of the switching circuit to configure an inverter circuit for driving a plurality of discharge tubes. The inverter circuit includes a voltage detecting circuit for detecting a voltage at any of connecting-midpoint of the series-connected secondary coils of the balancer-transformers, and a voltage comparing circuit for comparing an output of the voltage detecting circuit with a reference voltage. A signal designates an abnormal operation at an output of the voltage comparing circuit when the voltage of the connecting-midpoint exceeds the reference voltage.
    Type: Grant
    Filed: June 12, 2007
    Date of Patent: April 7, 2009
    Assignee: Sumida Electric Co., Ltd.
    Inventors: Hiroyuki Miyazaki, Takeshi Hatakeyama
  • Publication number: 20090001909
    Abstract: An automotive power inverter is provided. The power inverter includes a chassis, a microelectronic die coupled to the chassis and having an integrated circuit formed thereon, and an insulating region between the chassis and the microelectronic die.
    Type: Application
    Filed: June 28, 2007
    Publication date: January 1, 2009
    Inventors: Terence G. Ward, Gregory Scott Smith, George John, Tilak Gopalarathnam, David F. Nelson
  • Patent number: 7466083
    Abstract: A protective device for a vehicle electronic apparatus, which includes an inverter for converting a direct-current voltage into an alternating-current voltage for the vehicle electronic apparatus, detects a temperature of the inverter. Also, the protective device controls a power supply of the direct-current voltage to the inverter. The protective device stops the power supply to the inverter when the temperature of the inverter reaches a predetermined temperature.
    Type: Grant
    Filed: September 23, 2005
    Date of Patent: December 16, 2008
    Assignee: DENSO CORPORATION
    Inventor: Yoshifumi Goto
  • Publication number: 20080238333
    Abstract: A display apparatus includes a display panel and a backlight assembly including a lamp and an inverter. The inverter includes a main transformer, a main driver and a voltage controller. The main transformer applies a driving alternating current (AC) voltage to the lamp. The main driver generates an output signal controlling the main transformer based on a feedback signal from the main transformer. The voltage controller is electrically connected to a feedback terminal of the main driver to control a maximum level of a voltage applied to the feedback terminal.
    Type: Application
    Filed: March 13, 2008
    Publication date: October 2, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jin-Taek Hong, Song-Yi Han, Byung-Kyou Min
  • Patent number: 7430132
    Abstract: A medium or high voltage multi-inverter system is described, in which multiple inverter cells are included in a phase line to increase the voltage level supported by the system, and support higher voltage loads such as AC three-phase motors. In one configuration, five cells are used: two each in two phase lines, and one in a third phase line. In one of the phase lines having two cells, a second cell is series connected in reverse polarity, generates a phase matching the phase of the third line, while the other cell in the phase line generates an output with a different phase. One or more failure switches may be included to allow for short-circuiting of the output poles of one or more of the cells, so that in case of cell failure, the system can continue operation. For example, switches may be employed for the second cells in the two phase lines having two cells, and those cells may be available as spare cells in case of a cell failure.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: September 30, 2008
    Assignee: Toshiba International Corporation
    Inventor: Takashi Morishita
  • Publication number: 20080170421
    Abstract: A device and method for determining whether a malfunction is present in a drive circuit, which drives an electric device that generates counter-electromotive force, when all gates in the switching elements of the drive circuit are blocked. After the gates are blocked, the temperature of the switching elements is monitored and the presence of a malfunction is determined based on the detected temperature of the switching elements. A malfunction is determined to be present when the detected temperature equals or exceeds a predetermined temperature; the change in the detected temperature equals or exceeds a predetermined value; or the rate of change in the detected temperature equals or exceeds than a predetermined rate. Thus, it can be appropriately determined whether the gates in the drive circuit are appropriately blocked and minimize the influence of any malfunctions on other elements outside of the drive circuit.
    Type: Application
    Filed: March 2, 2006
    Publication date: July 17, 2008
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takeshi Kishimoto, Masaya Amano, Nobuyuki Tanaka, Kouji Miyazaki
  • Patent number: 7352544
    Abstract: A method and electrical circuit for dynamic reconfiguration of a DC-to-AC inverter comprising first and second power rails where each the rails has a power source. The method comprises monitoring the first and second power rails for short-circuit failure; and upon failure of one of the power rails, disconnecting the failed power rail from its power source.
    Type: Grant
    Filed: July 7, 2005
    Date of Patent: April 1, 2008
    Assignee: Pratt + Whitney Canada Corp.
    Inventor: Kamal Al-Haddad
  • Patent number: 7339807
    Abstract: One of a plurality of voltages is adapted to be applied to power supply terminals (2a, 2b, 2c). A rectifying circuit (6) rectifies the applied voltage and develops a rectified voltage between the output terminals (6a, 6b) thereof. Inverters (16a, 16b) are connected into one of a plurality of inverter connections between the rectifier output terminals (6a, 6b) in response to one of a plurality of inverter connection indicative signals. The inverter connections are set to correspond to respective ones of the plurality of voltages, so that a predetermined voltage can be applied to each inverter whichever one of the plurality of voltages is applied to the power supply terminals. An inverter connection indicative signal generating circuit (34) is manually operated to generate a desired one of the inverter connection indicative signals. A thyristor (8) is disposed between the rectifier output terminals (6a, 6b) and the inverters (16a, 16b).
    Type: Grant
    Filed: January 8, 2007
    Date of Patent: March 4, 2008
    Assignee: Sansha Electric Manufacturing Company, Limited
    Inventors: Masao Katooka, Tetsuro Ikeda, Kenzo Danjo, Takeshi Morimoto, Hideo Ishii
  • Publication number: 20080049467
    Abstract: The present invention provides an inverter with a simple configuration capable of preventing occurrence of excessive rush current. A current detection circuit detects an AC output current flowing out from an output filter circuit. When the absolute value of the AC output current becomes equal to or larger than a threshold, a reset control unit and a drive pulse generation circuit control a DC/AC inverter so as to re-start operation after the AC output voltage becomes 0V. For example, even in the case where a capacitive load is connected during operation of the inverter or in the case where the load includes a standby circuit, excessive rush current is prevented.
    Type: Application
    Filed: July 26, 2007
    Publication date: February 28, 2008
    Applicant: TDK CORPORATION
    Inventor: Yoshinobu Takayanagi