Transistor Inverter Patents (Class 363/56.01)
  • Patent number: 10903757
    Abstract: A power module for a converter, in particular for a multilevel converter. The power module includes a link circuit capacitor, two connection terminals, at least one half-bridge connected in parallel with the link circuit capacitor and having two semiconductor switches, and, for each half-bridge, a bypass diode connected in parallel with a first semiconductor switch of the half-bridge and a load-relief circuit group connected in parallel with the first semiconductor switch. The load-relief circuit group has a load-relief thyristor and a load-relief diode connected in series with the load-relief thyristor.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: January 26, 2021
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hans-Guenter Eckel, Daniel Schmitt, Frank Schremmer, Marcus Wahle
  • Patent number: 10896960
    Abstract: An inverter circuit is connected serially with a first silicon carbide MOSFET and a second silicon carbide MOSFET. During a dead time when the first silicon carbide MOSFET and the second silicon carbide MOSFET are OFF, transient current of at least 100 A/cm2 flows in a built-in diode of the first silicon carbide MOSFET and a built-in diode of the second silicon carbide MOSFET.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: January 19, 2021
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Takumi Fujimoto
  • Patent number: 10873253
    Abstract: The present disclosure discloses a method of discharging a bus capacitor in a power converter, the method comprising: outputting a plurality of pulse control signals to the corresponding plurality of power semiconductor switch groups when the working state of the power converter is in a discharge state and the state of the main circuit breaker is open to control the ON and OFF of the plurality of power semiconductor switch groups, respectively, so as to form a discharge loop between the positive terminal and the negative terminal of the bus capacitor within at least a preset time, thereby causing the bus capacitor to discharge. Since a discharge loop is formed by the bus capacitor and the bridge arms and the energy of the bus capacitor is consumed by a power device, thereby the peak value and discharge rate of discharge current can be effectively controlled without adding additional discharge elements.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: December 22, 2020
    Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Jianping Ying, Hailong Wang, Peng Xiao, Lifeng Qiao, Hongwei Xiao, Boyu Pu
  • Patent number: 10707859
    Abstract: A control device for controlling a power semiconductor component which includes at least two voltage-controlled power semiconductor devices which are electrically connected in parallel and which have each a control connection is disclosed. The control device includes a driver element which can be used to set electrical voltages at the control connections of the power semiconductor devices. The control device includes a measuring unit configured to capture electrical currents which flow through the power semiconductor devices. The driver element is configured to set a level and/or a temporal profile of the electrical voltages on the basis of the electrical currents.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: July 7, 2020
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Markus Mauersberger, Rainer Sommer
  • Patent number: 10559552
    Abstract: A semiconductor device includes a MOSFET including a PN junction diode. A unipolar device is connected in parallel to the MOSFET and has two terminals. A first wire connects the PN junction diode to one of the two terminals of the unipolar device. A second wire connects the one of the two terminals of the unipolar device to an output line, so that the output line is connected to the MOSFET and the unipolar device via the first wire and the second wire. In one embodiment the connection of the first wire to the diode is with its anode, and in another the connection is with the cathode.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: February 11, 2020
    Assignee: ROHM CO., LTD.
    Inventor: Keiji Okumura
  • Patent number: 10488450
    Abstract: An islanding detection method and apparatus for an inverter, and a power supply system to resolve a problem that an existing voltage total harmonic distortion (THD)-based islanding detection method has low islanding detection reliability due to existence of a relatively large detection dead zone. According to this detection method, the voltage total harmonic distortion changes more significantly before and after the islanding effect of the inverter occurs in order to reduce an islanding detection dead zone and improve islanding detection reliability.
    Type: Grant
    Filed: February 18, 2019
    Date of Patent: November 26, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Zhangping Shao, Kai Xin, Congyuan Wang
  • Patent number: 10447259
    Abstract: An electronic circuit includes: a bus bar connected to a power source having a positive terminal and a negative terminal; and a plurality of object switching elements as driving objects connected to the bus bar, the object switching elements forming a parallel connected circuit. The object switching elements include minimum on-resistance elements having minimum on-resistance compared to other object switching elements in a corresponding current region among mutually different current regions; and connection points between the minimum on-resistance elements and the bus bar are located at different locations to have mutually different inductance of respective conduction paths between the power source to the connection points located at the different locations.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: October 15, 2019
    Assignee: DENSO CORPORATION
    Inventors: Akira Kamiya, Yohei Kondo, Yosuke Asako
  • Patent number: 10244615
    Abstract: There is provided a radio frequency power source device configured to change a voltage ratio between two output end voltages, by switching a connection state of a voltage divider that divides the radio frequency voltage, in such a manner that the radio frequency voltage is divided into voltage outputs in antiphase with each other with respect to ground potential, and high voltage and low voltage are delivered in switching manner. Switching of the connection state in the voltage divider enables selective delivery of voltage having different values, high voltage or low voltage, and by selecting and delivering high voltage for the time high voltage is required, reduction of the voltage output from the radio frequency output circuit is prevented.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: March 26, 2019
    Assignee: KYOSAN ELECTRIC MFG. CO., LTD.
    Inventors: Itsuo Yuzurihara, Shinichi Kodama, Toshiyuki Adachi
  • Patent number: 10236690
    Abstract: A solar collection system may collect energy from the sun to generate electricity for distribution on an electrical grid. In addition to generating electricity, a solar collection system may include support devices such as motors, controllers, sensors, and other support devices to perform various tasks to allow the solar collection system to more effectively generate electricity. When the solar collection system is generating sufficient power, the support devices may be powered by the solar collection system. However, when the solar collection system is not generating sufficient power, the support devices may be powered by a backfeed power supply circuit coupled to the electrical grid.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: March 19, 2019
    Assignee: SunPower Corporation
    Inventors: Zachary Steele Judkins, Jacob Marshall, Venkatesh Prasad Hanglur Narasimha
  • Patent number: 10227085
    Abstract: A rotary electrical machine control apparatus is provided which controls drive of a rotary electrical machine having a plurality of winding sets. The apparatus includes inverters that are provided so as to respectively correspond to the winding sets, a temperature detection element that detects a base element that is used as a base for estimation of inverter temperatures, which are temperatures of the inverters, and a control section that has a temperature estimation section that estimates the inverter temperatures based on the base temperature and a temperature change amount generated due to current application to the inverters. On-resistance of the switching elements of the first inverter is smaller than on-resistance of the switching elements of the second inverter. The temperature detection element is disposed in an area, a distance between the area and the first inverter being shorter than a distance between the area and the second inverter.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: March 12, 2019
    Assignee: DENSO CORPORATION
    Inventors: Ryo Kano, Takashi Suzuki
  • Patent number: 10211005
    Abstract: A simple, economically efficient, synchronized switching system for control of a three phase motor contactor utilizes only Voltage monitoring to determine zero crossings and knowledge of the sinusoidal power waveforms and operational delay period of the contactor, to synchronize operation of the contacts at low power. The phases can be serially utilized for zero crossing detection upon Close or Open commands, so as to spread the wear over each set of contacts. Expensive metal at the contact surfaces can therefore be used more efficiently. For arc energy reduction upon contact opening, knowledge of Line-Load Voltage on at least one phase can be used to derive an empirical determination of the voltage angle at opening which yields the lowest arc energy.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: February 19, 2019
    Assignee: Schneider Electric USA, Inc.
    Inventors: Kevin M Jefferies, Benjamin W Edwards, Matthew L White, Alan E Freeman, Richard Karl Weiler
  • Patent number: 10090778
    Abstract: A multi-phase power device for driving an inductive load includes a first semiconductor device and a second semiconductor device connected in series in each of three phase arms. Each first semiconductor device includes a first switching device made of a wide-bandgap semiconductor and a freewheeling diode that is made of a narrow-bandgap semiconductor and is connected in anti-parallel to the first switching devices. Each second semiconductor device includes a second switching devices made of a wide-bandgap semiconductor and a freewheeling diode connected in anti-parallel to the second switching device.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: October 2, 2018
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Ryu Araki
  • Patent number: 9994109
    Abstract: A boost converter is configured of a boost chopper having a diode of an upper arm and a switching element of a lower arm. Output power from a battery to a load is limited such that a current flowing through boost converter does not exceed a current upper limit value for thermal protection of boost converter. The current upper limit value is set based not only on a cooling water temperature of boost converter but also on an output voltage VH of boost converter, in consideration of characteristics that, as output voltage VH rises, an amount of heat generated in diode decreases, diode being regarded as a main target of thermal protection since it receives a power running current to load. Thereby, the boost converter can be protected from overheating without excessively deteriorating vehicle traveling performance.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: June 12, 2018
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Etsushi Taguchi, Akihiro Takahashi
  • Patent number: 9954442
    Abstract: A comparator circuit includes a first comparator, a second comparator, and a logic portion. The logic portion adjust a variable reference voltage input to the second comparator to become close to a reference voltage input to the first comparator, during a period from a time point when reverse current of current flowing in a coil disposed in a switching power supply device is detected in a state where a first comparison signal is output as a comparison signal while the first comparator and the second comparator are operated, until a first predetermined period of time elapses in a state where switching operation of the switching power supply device is stopped (excluding a period from a time point when the reverse current is detected until a second predetermined period of time shorter than the first predetermined period of time elapses).
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: April 24, 2018
    Assignee: Rohm Co., Ltd.
    Inventors: Genki Tsuruyama, Tetsuo Tateishi
  • Patent number: 9917074
    Abstract: A semiconductor device includes a MOSFET including a PN junction diode. A unipolar device is connected in parallel to the MOSFET and has two terminals. A first wire connects the PN junction diode to one of the two terminals of the unipolar device. A second wire connects the one of the two terminals of the unipolar device to an output line, so that the output line is connected to the MOSFET and the unipolar device via the first wire and the second wire. In one embodiment the connection of the first wire to the diode is with its anode, and in another the connection is with the cathode.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: March 13, 2018
    Assignee: ROHM CO., LTD.
    Inventor: Keiji Okumura
  • Patent number: 9906144
    Abstract: System and method for protecting a power conversion system. An example system controller includes a protection component and a driving component. The protection component is configured to receive a feedback signal, a reference signal, and a demagnetization signal generated based on at least information associated with the feedback signal, process information associated with the feedback signal, the reference signal, and the demagnetization signal, and generate a protection signal based on at least information associated with the feedback signal, the reference signal, and the demagnetization signal. The demagnetization signal is related to multiple demagnetization periods of the power conversion system, the multiple demagnetization periods including a first demagnetization period and a second demagnetization period.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: February 27, 2018
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yunchao Zhang, Xiuhong Zhang, Lieyi Fang
  • Patent number: 9851415
    Abstract: The disclosure relates to the crossing field between a power transmission of an ultra-high-voltage and a power system simulation, specifically a method for analyzing an operation state of a substation by combining a whole grid model with a local grid model is provided according to the disclosure. The method includes following steps: performing a load flow calculation for the provincial grid to which a ultra-high-voltage line belongs, wherein initial data of the load flow calculation employs a grid model with E format for national power grid dispatching control center; making an equivalent transform for the model, forming an island independently from the provincial grid to which a ultra-high-voltage line belongs, and making a load flow calculation for the island to acquire data of node voltages and line transmission power.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: December 26, 2017
    Inventors: Lei Dong, Ye Li, Aizhong Tian, Xiaoli Shen, Peng Liu, Chanqiong Wang
  • Patent number: 9787173
    Abstract: A multilevel converter has a plurality of series-connected sub modules, which each have at least one first switch, one second switch and one capacitor. Current is output by way of the capacitor during discharging phases and current is received or charging the capacitor during charging phases. At least one of the sub modules has two part-modules that are galvanically connected to each other or are formed by two part-modules that are galvanically connected to each other. Each has a first switch, a second switch and a capacitor, and a first and a second part-module terminal. The galvanic connection between the two part-modules includes at least one inductive element.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: October 10, 2017
    Assignee: Siemens Aktiengesellschaft
    Inventor: Hans-Guenter Eckel
  • Patent number: 9679877
    Abstract: A semiconductor device includes a MOSFET including a PN junction diode. A unipolar device is connected in parallel to the MOSFET and has two terminals. A first wire connects the PN junction diode to one of the two terminals of the unipolar device. A second wire connects the one of the two terminals of the unipolar device to an output line, so that the output line is connected to the MOSFET and the unipolar device via the first wire and the second wire. In one embodiment the connection of the first wire to the diode is with its anode, and in another the connection is with the cathode.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: June 13, 2017
    Assignee: ROHM CO., LTD.
    Inventor: Keiji Okumura
  • Patent number: 9627961
    Abstract: A mixed power supply device includes a power supply component for providing a DC voltage; a DC-DC conversion module coupled to the power supply component to receive the DC voltage and output a stable DC voltage; a current transformation module coupled between the DC-DC conversion module and a load to receive the stable DC voltage and convert the stable DC voltage into an AC voltage; and a merging network switching switch coupled to the current transformation module to connect the current transformation module and a utility power network in parallel or disconnect the current transformation module from the utility power network, allowing a load to receive merging network mode-based power supply or standalone mode-based power supply, wherein, in the merging network mode, the current transformation module performs unbalanced current compensation on load unbalance of the load.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: April 18, 2017
    Assignee: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Chi-Sheng Wu, Kuo-Kuang Jen, Hsuang-Chang Chiang, Tsang-Li Tai
  • Patent number: 9459310
    Abstract: There is provided an inverter test apparatus for testing an inverter interconnected with an alternating-current power system, the apparatus including an alternating-current power output unit configured to output alternating-current power, and an alternating-current power controller configured to control the alternating-current power output from the alternating-current power output unit to simulate an alternating-current load of the inverter.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: October 4, 2016
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Ruben Alexis Inzunza Figueroa, Tatsuaki Amboh
  • Patent number: 9297847
    Abstract: The invention relates to a method for checking a separation point (14) between a photovoltaic inverter (1) and a power supply network (7) having multiple phases (L1, L2, L3) and a neutral conductor (N), wherein multiple switching contacts of the separation point (14) are controlled by the photovoltaic inverter (1), and to a photovoltaic inverter (1). To allow a simple and quick check of the functionality of the separation point (14), the switching contacts of the separation point (14) are each formed by single-pole relays (15-22) and switched in steps according to a switching pattern. For checking switching contacts, a voltage (26, 27, 28) is measured at at least one phase (L1, L2, L3) with respect to the neutral conductor (N), upstream of the separation point (14), and compared to voltage values assigned in accordance with the switching pattern, thereby to deduce the functionality of the switching contacts.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: March 29, 2016
    Assignee: Fronius International GmbH
    Inventors: Friedrich Oberzaucher, Joachim Danmayr
  • Patent number: 9209688
    Abstract: In one aspect, this disclosure relates to a method of controlling current output from a switching regulator to a load via an inductor. Inductor current information can be sampled at a peak level, such as just before a transistor configured to cause current to flow through the inductor is turned off. The sampled inductor current can be compared with a reference current, and a current limit threshold can be adjusted based on the comparison. The output current of the switching regulator can be controlled based on a comparison of the current limit threshold with an indicator of current flowing through the inductor. This method can accurately and efficiently limit current in a switching regulator.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: December 8, 2015
    Assignee: ANALOG DEVICES GLOBAL
    Inventor: Bin Shao
  • Patent number: 9059643
    Abstract: A circuit having a plurality of parallel-connected partial circuits for feeding an inverter circuit. A partial circuit comprises an unregulated voltage source with a temporally variable output DC voltage and a synchronous converter having an automatically functioning regulating circuit. The circuit is triggered according to two modes of operation. The first mode of operation is as an upward converter, when the value of the output voltage of the unregulated voltage source exceeds a threshold value, and thus the inverter circuit is supplied with the requisite input voltage. The second mode of operation is as a downward converter, when the value of an output voltage of the unregulated voltage source is below a threshold value, or when there is no output voltage from the unregulated voltage source, in which case a first capacitor is charged from the DC voltage applied to the second terminals.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: June 16, 2015
    Assignee: Semikron Elektronik GmbH & Co.
    Inventor: Kevork Haddad
  • Publication number: 20150138854
    Abstract: An apparatus and a method for detecting phase deficiency in an inverter is provided, the method including deciding whether a sector of the output current is a sector where current detection is possible based on switching operation status of the switching element in the inverter, maintaining a phase deficiency variable when deciding the current detection in the sector of the output current to be impossible, adding a count to a phase deficiency variable to accumulate when deciding the current detection in the sector of the output current to be possible and deciding the output current to be within a phase deficiency band, and determining as phase deficiency when the phase deficiency variable is greater than a prescribed detection level.
    Type: Application
    Filed: November 12, 2014
    Publication date: May 21, 2015
    Applicant: LSIS CO., LTD.
    Inventors: Jae Moon LEE, Tae Suk BAE
  • Patent number: 9036384
    Abstract: Provided is a configuration in which it is possible to mount an applied voltage suppression circuit configured to prevent voltage breakdown of a semiconductor switching element, and a set voltage thereof can be inspected without damaging an IC or the like of a peripheral circuit. In a power converter having a semiconductor switching element, an applied voltage suppression circuit configured to suppress a voltage applied to the semiconductor switching element and at least one component of constituent components of a driving circuit which causes the semiconductor switching element to be turned off if the component is absent are transferred to and disposed on a slave substrate (separate unit) which is divided from and electrically connected to a master substrate including the semiconductor switching element, the driving circuit, a control circuit, and the like mounted thereon.
    Type: Grant
    Filed: December 24, 2010
    Date of Patent: May 19, 2015
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Haruo Suenaga, Nobuo Shirokawa, Hideaki Moriya, Manabu Kinoshita
  • Publication number: 20150085539
    Abstract: A processor unit in an electric power converter executes detection of an overheating predicted state that is a stage prior to overheating of the IGBTs, a short circuit predicted state that is a stage prior to a short circuit in the arms, and a voltage drop predicted state that is a stage prior to a drop in a control voltage to be supplied to a driver circuit. When none of these predicted states is detected, a determination that an abnormality is not caused in the power module based on a latch signal is made by the processor unit. When an overheating predicted state is detected, the processor unit lowers the duty ratio of a motor control signal. When a short circuit predicted state is detected, the processor unit prolongs the dead time in which the upper IGBTs and the lower IGBTs are both maintained in the off-state.
    Type: Application
    Filed: September 15, 2014
    Publication date: March 26, 2015
    Applicant: JTEKT Corporation
    Inventor: Yusuke UEDA
  • Patent number: 8976554
    Abstract: A cascaded multi-level inverter is controlled in fault bypass operation. Rather than relying on approximations or feedback forms, the reference voltages are generated as an analytic solution. The analytic solution and its implementation are not affected by the output frequency of the inverter and it is able to provide maximum possible balanced line-line voltage to a three-phase motor. In addition, the analytic solution provides exact limits for the allowable operation region of the motor power factor in order to prevent overvoltage conditions of the cell inverter.
    Type: Grant
    Filed: September 18, 2012
    Date of Patent: March 10, 2015
    Assignee: Siemens Corporation
    Inventor: Liviu Mihalache
  • Patent number: 8964429
    Abstract: An inverter device includes: an inverter circuit configured to perform ON/OFF operations with a preset duty cycle to convert a DC power into an AC power and output the AC power to an AC motor; and a controller configured to change a duty cycle of the ON/OFF operations.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: February 24, 2015
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Yuki Horie, Shinji Watanabe, Yasushi Nakano, Yukihiro Shima
  • Patent number: 8913407
    Abstract: An example controller for a primary side control power converter includes a feedback circuit, a driver circuit, and an adjustable voltage reference circuit. The feedback circuit compares a feedback signal representative of a bias winding voltage of the power converter with a voltage reference. The driver circuit outputs a switching signal having a switching period to control a switch to regulate an output of the power converter in response to the feedback signal and enables or disables a switching period based on the output of the feedback circuit. The adjustable voltage reference circuit adjusts the voltage reference by a first amount in response to a first number of disabled switching periods indicating a first load condition at the output of the power converter and by a second amount in response to a second number of disabled switching periods indicating a second load condition at the output of the power converter.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: December 16, 2014
    Assignee: Power Integrations, Inc.
    Inventors: Leif Lund, Alex B. Djenguerian, William M. Polivka
  • Patent number: 8908405
    Abstract: An inverter may include an inversion unit for converting a direct current bus voltage into an alternating current voltage, a first snubber unit, and a second snubber unit. The inversion unit may include a first external switch, a first internal switch, a second internal switch, and a second external switch which are connected in series in order between a direct current bus positive voltage terminal and a direct current bus negative voltage terminal. The first snubber unit may be connected between the direct current bus negative voltage terminal and the first internal switch for suppressing voltage stress of the first internal switch. The second snubber unit may be connected between the direct current bus positive voltage terminal and the second internal switch for suppressing voltage stress of the second internal switch.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: December 9, 2014
    Assignee: Liebert Corporation
    Inventor: Jianning Yang
  • Publication number: 20140339890
    Abstract: A power conversion system includes a bus bar, a switch coupled to the bus bar and configured to receive a DC input voltage from a voltage source through the bus bar, and a parallel fuse system. The parallel fuse system may be disposed on the bus bar in series with the voltage source and the switch. The parallel fuse system includes two or more parallel fuses, and may be configured for an inductance imbalance between the fuses, such that there is an asymmetric flow of currents through the fuses when the power conversion system is in operation. For the inductance imbalance, for example, the fuses may be positioned asymmetrically with regard to a shortest conductive path from the voltage source to the switch.
    Type: Application
    Filed: December 18, 2012
    Publication date: November 20, 2014
    Inventors: Jeffrey John Wolff, Jason Daniel Kuttenkuler, Alvaro Jorge Mari Curbelo, Henry Todd Young
  • Patent number: 8890453
    Abstract: In a power conversion apparatus, a main switching element in one main circuit is controlled to repeat an on-off state, and a diode in the other main circuit is used as a freewheeling diode. Multiple snubber circuits each having a resistor, a capacitor, and a second switching element which are serially coupled are coupled in parallel to the main circuit. The second switching elements are turned-on sequentially before the turn-on or turn-off of the main switching element that repeats the on-off state.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: November 18, 2014
    Assignee: DENSO CORPORATION
    Inventor: Kenji Kure
  • Publication number: 20140334202
    Abstract: A system, method, and apparatus is disclosed for interfacing and transferring power unidirectionally or bidirectionally between a direct current (DC) line and a single or multiphase alternating-current (AC) line for only half of any given phase and only a single phase at a time when polarity is matched between the DC and the AC system. A circuit with simplified, robust, and reduced-cost components perform the power conditioning and the synchronization as a system that simulates a half-wave rectifier/inverter.
    Type: Application
    Filed: July 25, 2014
    Publication date: November 13, 2014
    Inventor: D Kevin Cameron
  • Publication number: 20140307492
    Abstract: An inverter for driving a motor generator has series connection units, each of which has two switching elements, connected in series, in high and low voltage sides, respectively. A drive unit is arranged for each switching element. A gate of the switching element is connected to an emitter thereof through a first cutoff resistance and a first cutoff switching element in the drive unit. The gate of the switching element is also connected to the emitter thereof through a second cutoff resistance and a second cutoff switching element in the drive unit. A resistance value of the first cutoff resistance is higher than a resistance value of the second cutoff resistance. A software cutoff process is performed when the switching element is in a completely turned-on state so that the first cutoff switching element is turned on and the second cutoff switching element is turned off.
    Type: Application
    Filed: April 10, 2014
    Publication date: October 16, 2014
    Applicant: DENSO CORPORATION
    Inventors: Tomotaka SUZUKI, Yoshiyuki HAMANAKA
  • Publication number: 20140286060
    Abstract: An electric vehicle includes: a main battery; an electric power converter configured to convert power to driving power of a drive motor; an auxiliary battery configured to supply power to auxiliaries; a power supply harness connecting the auxiliary battery to the auxiliaries; a step-down converter having an output end connected to the power supply harness, the step-down converter being configured to step down an output voltage of the main battery to the driving voltage of the auxiliaries; an interrupter configured to isolate the step-down converter from the power supply harness at the time when a predetermined specific abnormality has been detected; and a discharger configured to discharge a capacitor incorporated in the electric power converter, the discharger being configured to operate by receiving electric power supplied from a first power supply path which connects the output end of the step-down converter to the interrupter.
    Type: Application
    Filed: March 18, 2014
    Publication date: September 25, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Masanori SUGIURA
  • Patent number: 8837177
    Abstract: An electric generating system using a solar cell improves the quality of output power by including a converter for converting an output voltage generated from the solar cell into DC voltage in a pulse shape. An inverter converts the DC voltage in the pulse shape into an AC voltage and applies the AC voltage to a power system and a control device for determining whether an erroneous operation of the electric generating system using the solar cell is generated or not based on an output voltage of the solar cell, an output current of the solar cell and a voltage of the power system. At least one inverter switching device among a plurality of inverter switching devices performs a switching at a frequency higher than a frequency during a normal operation at an interval where the erroneous operation is generated.
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: September 16, 2014
    Assignees: Samsung Electro-Mechanics Co., Ltd., Sungkyunkwan University Foundation for Corporate Collaboration
    Inventors: Tae Won Lee, Yong Hyok Ji, Young Ho Kim, Doo Young Song, Min Ho Heo, Tae Hoon Kim, Se Ho Lee, Chung Yuen Won
  • Patent number: 8830658
    Abstract: The invention relates to a switch cabinet arrangement of a device for generating electrical energy, wherein the switch cabinet arrangement comprises at least two separate power switch cabinets. The technical object of achieving an optimum scalability of devices for generating electrical energy with at the same time a simple installation and maintenance of the power switch cabinets despite a small available installation space, is achieved according to the invention in that the power switch cabinets respectively comprise a machine connection, a power module, a mains connection and a decentralised control unit, wherein the power module comprises a machine converter, a mains converter, a direct voltage intermediate circuit and a chopper, and wherein the power switch cabinets are electrically connected in parallel to one another via the machine connection and the mains connection.
    Type: Grant
    Filed: October 3, 2013
    Date of Patent: September 9, 2014
    Assignee: Woodward Kempen GmbH
    Inventors: Markus Eichler, Hans-Georg Nowak, Marianne Hitpaβ
  • Publication number: 20140239724
    Abstract: A power conditioner according to an exemplary aspect of the present invention includes a first converter that converts a first DC voltage supplied from an external power supply into a second DC voltage, an inverter that converts the second DC voltage into an AC voltage and outputs the AC voltage to an external line so as to keep receiving power by the external line from a supply source system in a predetermined range, and an energy management unit that stops operations of the first converter and the inverter at predetermined time previously determined based on a magnitude of load power consumed by a load connected to the external line.
    Type: Application
    Filed: November 18, 2013
    Publication date: August 28, 2014
    Applicant: TAKASAGO, LTD.
    Inventors: Yasuhiro ISHIKAWA, Kazuaki HONDA
  • Patent number: 8811037
    Abstract: Peak current in a switching converter is controlled using a closed loop to compensate for error caused by delay time in the switching transistor and control logic. A reference value is established that represents a target current value. A compensated reference value is derived from the reference value by the closed loop. A periodic inductor current is formed in the switching converter in response to the compensated reference value. An error signal is formed that is indicative of an amount of time the inductor current exceeds the target current value. The compensated reference value is dynamically adjusted by the compensation closed loop to minimize the error signal.
    Type: Grant
    Filed: September 5, 2011
    Date of Patent: August 19, 2014
    Assignee: Texas Instruments Incorporated
    Inventor: Filippo Marino
  • Patent number: 8767412
    Abstract: Control devices can be destroyed or damaged by their supply voltage in the event of malfunction. The voltage supply according to the present invention comprises a means (12) having a primary part (121) and secondary part (122), the primary part (121) being connected to the voltage source (10) and being controllable by means of the voltage output (112) of the voltage converter (11), and the secondary part (122) comprising a first and a second mutually independent winding, a supply voltage for the control device being made available by means of the first winding, and the second winding being connected to the voltage input (111) of the voltage converter (11) so that a supply voltage, additional to the voltage source (10), for the voltage converter (11) is implemented by means of the second winding.
    Type: Grant
    Filed: September 1, 2009
    Date of Patent: July 1, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Gerhard Wecht
  • Publication number: 20140160802
    Abstract: A fault protection and correction circuit for the control of a power converter is disclosed. An example circuit generates a waveform that drives a switch on or off and controls the power converter. The controller circuit in addition to power factor correction (PFC) circuitry includes a first and a second shut down mode modules, both of them cause the switching to stop. The circuit includes a module for receiving fault events. When a fault occurs, the controller enters the second shut down mode. The controller stays in the second shut down mode if the required current for this mode can be provided by the outside circuitry. Otherwise, the controller enters the first shut down mode that requires less current and subsequently restarts the controller. By modifying the outside circuitry the controller can respond differently to fault events.
    Type: Application
    Filed: December 7, 2012
    Publication date: June 12, 2014
    Applicant: Atmel Corporation
    Inventors: Hong Zhang, Sean S. Chen, Dilip Sangam, Wenbo Liang
  • Patent number: 8730691
    Abstract: A power conversion apparatus, such as an uninterruptible power supply, included first and second DC busses, a neutral node and an inductor configured to be coupled to a load. The apparatus further includes an inverter circuit coupled to the first and second DC busses, to the neutral node and to the inductor and configured to selectively couple the first and second DC busses and the neutral node to a first terminal of the inductor to generate an AC voltage at a second terminal of the inductor such that, in a given half-cycle of the AC voltage, the inverter circuit uses a switching sequence wherein the first DC bus, the second DC bus and the neutral node are successively coupled to the first terminal of the inductor.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: May 20, 2014
    Assignee: Eaton Corporation
    Inventor: Esa Kai Paatero
  • Publication number: 20140126255
    Abstract: In one aspect, a method for over-voltage protection is provided. The method includes connecting a first winding of a saturable reactor to a direct current (DC) source; connecting at least one phase of an alternating current (AC) electrical system to ground through a second winding of the saturable reactor; and controlling DC current flow from the DC source to the first winding of the saturable reactor in response to an over-voltage event, wherein energy is shunted to ground from the at least one phase of the alternating current electrical system through the second winding of the saturable reactor.
    Type: Application
    Filed: November 6, 2012
    Publication date: May 8, 2014
    Applicant: General Electric Company
    Inventor: Theodore Steven Wilmot
  • Patent number: 8717787
    Abstract: A method and apparatus are provided for operating a converter circuit, which includes at least two phase modules each having first and second subconverter systems, which include power semiconductor switches. The switches of the first and second subconverter systems are driven by first and second drive signals, respectively. To enable dimensioning a capacitive energy store of the converter circuit to be independent of a desired current at an output connection of the converter circuit, for each phase module, the first and second drive signals are respectively formed from a voltage signal across inductances and a switching function for the switches of the first and second subconverter systems, respectively. The switching functions are formed by a voltage signal corresponding to the voltage at the output connection and a selectable reference signal. The voltage signals are selected to be in phase with the voltage at the output connections of the phase modules.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: May 6, 2014
    Assignee: ABB Schweiz AG
    Inventors: Manfred Winkelnkemper, Arthur Korn
  • Patent number: 8717781
    Abstract: A direct current (DC)/DC converter capable of lowering power consumption and capable of being started in a short time is provided. A voltage generated at a second output capacitor is input to a power supply terminal. An input voltage is input to a high voltage terminal. A charging transistor is a N-channel Metal Oxide Semiconductor Field Effect Transistor disposed between the high voltage terminal and the power supply terminal and applied with a bias so that the charging transistor is normally on. In a first state, in which the voltage of the power supply terminal is lower than a specified first threshold voltage, a current limiting circuit limits a charging current flowing from the high voltage terminal to the power supply terminal, and in a second state in which the voltage is higher than a second threshold voltage, the current limiting circuit lowers the charging current substantially to zero.
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: May 6, 2014
    Assignee: Rohm Co., Ltd.
    Inventor: Satoru Nate
  • Patent number: 8717788
    Abstract: A method and system for controlling a power converter system with a direct current (DC)-bus capacitor connected to at least a first converter and a second converter. The first converter is with associated first current and the second converter is with associated second current. Switching states of the first and second converters are determined. The switching states of the second converter are sequenced relative to the first converter to reduce a difference of sums of the associated first and second currents between adjacent time intervals.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: May 6, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Chingchi Chen, Michael W. Degner, Satish Thuta
  • Publication number: 20140118868
    Abstract: Systems and methods for a fault protection are provided that can be implemented in a hybrid electric vehicle (HEV) to limit the magnitude of a current that flows when an AC-to-chassis fault (ACF) occurs between an AC connection and the chassis of the HEV. An electric machine having a winding, an inverter sub-module (ISM) having a first switch and a second switch, and fault protection elements (FPEs), coupled to the ISM, are provided. The winding is coupled to the ISM coupled via the AC connection. The FPEs can include, for example, first and second inductances. To limit the magnitude of the current, the current can be passed along a first current path that includes the second inductance when the first switch is closed, and can be passed along a second current path that includes the first inductance when the second switch is closed.
    Type: Application
    Filed: October 31, 2012
    Publication date: May 1, 2014
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: KON-KING M. WANG, WILLIAM T. IVAN, BRYAN M. LUDWIG, KRIS S. SEVEL
  • Publication number: 20140104902
    Abstract: The invention relates to a method for operating an inverter (1), in particular a pulse-controlled inverter, comprising multiple phase systems (2, 3, 4), each of which has an outer conductor (7, 8, 9) and at least one semiconductor component (12, 13), and a temperature monitoring device (15) that has multiple temperature sensors (16, 17, 18) which sense the temperature of at least one part of at least one of the phase systems (2, 3, 4). In said method, a temperature gradient is determined from each of the sensed temperatures, the difference of the determined temperature gradients from an estimated gradient value is ascertained, and if the difference exceeds a threshold value, a fault of the inverter (1), in particular of a cooling device of the inverter (1), is identified. The invention further relates to an inverter (1).
    Type: Application
    Filed: April 4, 2012
    Publication date: April 17, 2014
    Applicant: ROBERT BOSCH GMBH
    Inventor: Miguel Casares
  • Publication number: 20140098581
    Abstract: Aspects of the invention are directed to a gate driving circuit for a power conversion circuit having an upper and lower arm circuit composed of series-connected upper arm and a lower arm, each arm including two or more semiconductor switching devices connected in series. In some aspects, a gate driving circuit of the invention includes a circuit of series connection including a diode and a resistor between a positive potential side of a positive side power supply and a positive electrode side. The gate driving circuit can determine a short-circuit fault of the semiconductor switching device that is connected to the gate driving circuit by detecting the current that flows through the circuit of series connection including the diode and the resistor when an OFF command of ON/OFF command signals is given to the semiconductor switching device.
    Type: Application
    Filed: October 1, 2013
    Publication date: April 10, 2014
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventor: Satoki TAKIZAWA