Including Automatic Or Integral Protection Means Patents (Class 363/50)
  • Patent number: 10686442
    Abstract: A method and apparatus for dynamically matching a plurality of resistors to a sensor are disclosed. In the method and apparatus, a switching block of a plurality of switching blocks receives a plurality of selection signals. The switching block is coupled to a resistor array having a plurality of resistors that are coupled in series and arranged in a closed loop. Each two resistors are coupled to each other by a respective resistor node of a plurality of resistor nodes. The switching block of the plurality of switching blocks has a plurality of input nodes and an output node, where the output node is coupled to the respective resistor node of the plurality of resistor nodes. In the method and apparatus, the switching block couples an input node of the plurality of input nodes to the output node based on the selection signals.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: June 16, 2020
    Assignee: STMICROELECTRONICS INTERNATIONAL N.V.
    Inventors: Tanmoy Sen, Aswani Aditya Kumar Tadinada
  • Patent number: 10673230
    Abstract: A bipolar DC power transmission scheme comprises: DC poles, each including a respective power transmission medium extending between two ends; a plurality of converters, wherein each end of the power transmission medium of the first pole is respectively operatively connected to a converter, and each end of the power transmission medium of the second pole is respectively operatively connected to a converters; a controller programmed to block one or more of the converters in response to a fault occurring on either of the first and second poles; and a monitoring device configured to identify the faulty poles on which the fault has occurred, wherein the controller is further programmed to deblock the or each blocked converter connected to the other of the poles after the monitoring device has identified the faulty one of the poles on which the fault has occurred.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: June 2, 2020
    Assignee: General Electric Technology GmbH
    Inventors: Robin Gupta, Robert Stephen Whitehouse
  • Patent number: 10644584
    Abstract: A power controller provides open-circuit protection for a power supply when an open circuit occurs between a ground end of an auxiliary winding and an input ground. The power controller provides a PWM signal to determine an ON time and an OFF time of a power switch connected in series between an input voltage and the input ground. A deviation detector in the power controller detects a winding voltage at a floating end of the auxiliary winding during the ON time, and asserts an open protection signal when a variation of the winding voltage during the ON time fits a first predetermined condition, so as to keep the power switch turned OFF and provide the open-circuit protection.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: May 5, 2020
    Assignee: LEADTREND TECHNOLOGY CORPORATION
    Inventors: Kuan Hsien Chou, Fong Cheng Yang
  • Patent number: 10483861
    Abstract: A flyback converter controller is provided with a single terminal through which the flyback converter controller senses for over-voltage faults for an input voltage and also senses for open circuit faults for an auxiliary winding. A first voltage divider provides a divided version of the input voltage to the single terminal. The controller compares a voltage for the single terminal to at least one over-voltage threshold to detect the over-voltage fault for the input voltage.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: November 19, 2019
    Assignee: DIALOG SEMICONDUCTOR INC.
    Inventors: Guang Feng, Jiang Yu, Qifeng Shi, Qiu Sha, Xiaolin Gao, Yong Xiong Lin
  • Patent number: 10477631
    Abstract: The present application discloses a power circuit applied in a LED load. The power circuit includes: a power converter configured to convert an input voltage into a DC output voltage; a first feedback module configured to detect the output voltage and an output current of the power converter, and to output a first feedback signal; a second feedback module configured to detect the output voltage and the output current of the power converter, and to output a second feedback signal, the second feedback module and the first feedback module being independent to each other; and a control circuit configured to output a control circuit according to the first feedback signal or the second feedback signal to control the power converter via the control signal so as to make the output power of the power converter smaller than a predetermined power threshold.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: November 12, 2019
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Xiaobo Wang, Xinghua Zhang
  • Patent number: 10432101
    Abstract: A first bridge circuit includes a first leg and a second leg. The first leg includes an upper arm and a lower arm. The upper arm includes a plurality of switching devices connected in series, a plurality of freewheeling diodes connected in antiparallel with the switching devices, respectively, and a plurality of snubber capacitors connected in parallel with the switching devices, respectively. A control circuit controls the first and second bridge circuits such that a dead time period is provided between a turn-on period of an upper arm and a turn-on period of a lower arm included in each of the first and second legs, in each of the first and second bridge circuits.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: October 1, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takaharu Ishibashi, Takushi Jimichi, Kimiyuki Koyanagi
  • Patent number: 10404157
    Abstract: An AC-DC conversion device that includes a major circuit portion and a control circuit is provided. The major circuit portion includes a converter in which multiple switch portions in a bridge connection include separately-excited switching elements and snubber circuits connected in parallel with the switching elements; and the major circuit portion is connected to an alternating current power supply and a direct current circuit and applies, to the direct current circuit, an alternating current voltage applied from the alternating current power supply by an ON of the multiple switch portions. The control circuit controls the voltage applied to the direct current circuit by controlling the ON timing of the multiple switch portions by inputting a control pulse to each of the multiple switch portions.
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: September 3, 2019
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Keisuke Hattori, Teruo Yoshino, Tomohisa Okami
  • Patent number: 10284096
    Abstract: A control circuit controls a switch of a switching current converter receiving an input quantity, with a transformer having a primary winding and a sensor element generating a sensing signal correlated to a current in the primary winding. The control circuit has a comparator stage configured to compare a reference signal with a comparison signal correlated to the sensing signal and generate an opening signal for the switch. The comparator stage has a comparator element and a delay-compensation circuit. The delay-compensation circuit is configured to generate a compensation signal correlated to the input quantity and to a propagation delay with respect to the opening signal. The comparator element generates the opening signal with an advanced timing correlated to the input quantity and to the propagation delay.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: May 7, 2019
    Assignee: STMicroelectronics S.r.l.
    Inventor: Giovanni Gritti
  • Patent number: 10243511
    Abstract: Provided is a method for performing automatic modularity control of an inverter and an inverter that includes DC power sources configured to supply DC power, a plurality of converters to convert direct current power to alternating current power to be supplied to a load, and a controller. The controller performs automatic modularity control of the plurality of converters, by separately controlling the plurality of converters and detecting an operation status thereof and performs fault detection at the plurality of converters at an early stage and isolates a respective converter of the plurality of converters, while continuously supplying power to the load via remaining converters of the plurality of converters. The automatic modularity control further includes early fault detection based continuous monitoring of the current produced by each converter and semiconductor switching feedback and cyclic starting of the inverter to normalize the lifecycle of the circuit breaker.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: March 26, 2019
    Assignee: GE ENERGY POWER CONVERSION TECHNOLOGY LIMITED
    Inventors: Datatreya Reddy Gollapudi, Britto Arputhanathan, Venkateswaran Mathurai
  • Patent number: 10164518
    Abstract: A power control device includes a switch control circuit, a first resistor, a second resistor, a third resistor, a sense node, a first comparator, a second comparator, a transformation circuit, and a logic control circuit. The switch control circuit outputs a driving signal according to a set signal and a reset signal. The first resistor, the second resistor, and the third resistor generate a reference voltage according to a feedback current. The sense node receives a current sample voltage. The first comparator outputs a first control signal according to the current sample voltage and the reference voltage. The transformation circuit outputs a short detection voltage according to the current sample voltage. The second comparator outputs the second control signal according to the current sample voltage and the short detection voltage. The logic control circuit gate outputs the reset signal according to the first control signal and the second control signal.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: December 25, 2018
    Assignee: WELTREND SEMICONDUCTOR INC.
    Inventors: Yi-Lun Shen, Ren-Yi Chen
  • Patent number: 9995796
    Abstract: An apparatus, method, and system for detecting arc-faults in a photovoltaic array are disclosed. Further, the detection not only identifies that an arc-fault is present in the array, but also classifies whether the arc-fault is a series type arc-fault or a parallel type arc-fault. Upon determination of the specific type of arc-fault that is at issue, de-energizing the arc-fault specific to the type is selected and carried out.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: June 12, 2018
    Assignee: National Technology & Engineering Solutions of Sandia, LLC
    Inventor: Jay Johnson
  • Patent number: 9991820
    Abstract: A multi-level converter is provided. The multi-level converter may include a plurality of direct current (DC) sources coupled in series to form a DC link, and at least one phase circuit coupled in parallel to the DC link. The phase circuit may include at least one flying capacitor, at least one output node, a first set of switching devices selectively coupling the flying capacitor to one or more of the DC sources at a first frequency, and a second set of switching devices selectively coupling the flying capacitor to the output node at a second frequency.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: June 5, 2018
    Assignee: Caterpillar Inc.
    Inventor: Yingying Kuai
  • Patent number: 9929675
    Abstract: An inverter apparatus is provided. The inverter apparatus includes a direct current to direct current (DC/DC) converter, a direct current to alternating current (DC/AC) converter and a control circuit. The DC/DC converter is arranged for converting an input power to a DC power according to a control signal. The DC/AC converter is coupled to the DC/DC converter, and is arranged for receiving the DC power, and generating an AC power according to the DC power. The control circuit is coupled to the DC/DC converter, and is arranged for generating the control signal according to a reference power and the input power so as to control an operation of the DC/DC converter, detecting the control signal to generate a detection result, and controlling the reference power according to the detection result so as to adjust a duty cycle of the control signal.
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: March 27, 2018
    Assignee: FSP TECHNOLOGY INC.
    Inventors: Han-Wei Chen, Chun-Hao Yu, Chia-Hua Liu
  • Patent number: 9906138
    Abstract: A power conversion apparatus including a flyback power conversion circuit, a control chip and a detection auxiliary circuit is provided. The flyback power conversion circuit receives and converts an input voltage into a DC output voltage. The control chip generates a PWM signal in response to a power supplying requirement to control the operation of the flyback power conversion circuit, wherein the control chip has a single multi-function detection pin. The detection auxiliary circuit assists the control chip to obtain a first detection voltage via the multi-function detection pin, such that the control chip performs a detection of an over temperature protection (OTP) and a detection of an over voltage protection (OVP) synchronously according to the first detection voltage. The first detection voltage is related to the DC output voltage or a thermal voltage of an environment temperature.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: February 27, 2018
    Assignee: Power Forest Technology Corporation
    Inventor: Po-Jen Ke
  • Patent number: 9881912
    Abstract: A semiconductor device according to an embodiment includes a plurality of circuit units, and each of the circuit units includes, a first electrode, a second electrode; a first switching element and a second switching element electrically connected in series between the first electrode and the second electrode, and a third electrode electrically connected between the first switching element and the second switching element. The circuit units are arranged in an annular shape.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: January 30, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuto Takao, Shinya Kyogoku
  • Patent number: 9872353
    Abstract: An LED lighting device 2 according to this embodiment includes a lighting circuit that supplies a current to an LED, and a dimmer 7 that generates a PWM signal for controlling the supply of the current to the LED from the lighting circuit, in which the dimmer 7 feedback-controls the PWM signal that controls the supply of the current to the LED by comparing the output current to be output to the LED with a target current and feedforward-controls the PWM signal according to a fluctuation of an input voltage from a commercial power supply 1.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: January 16, 2018
    Assignee: Renesas Electronics Corporation
    Inventors: Motoaki Suzuki, Mamoru Kitamura, Keisuke Fukuda
  • Patent number: 9812945
    Abstract: The present disclosure relates to a circuit structure for enhancing EFT immunity of primary side converter, including a power ground and a feedback voltage detecting block, a feedback current detecting block, a controller, a PWM driving block, a high voltage starting block, a starting unit, a circuit for enhancing EFT immunity of primary side converter, a power MOS transistor, and an OR gate configured to perform a logical OR of an off-time calculated theoretically and an off-time output by an off-time control block. The present disclosure enhances EFT immunity effectively and improves the dynamic characteristics of the primary side converter.
    Type: Grant
    Filed: October 12, 2015
    Date of Patent: November 7, 2017
    Assignee: Wuxi Chipown Micro-Electronics, Limited
    Inventors: Haisong Li, Ping Tao, Changshen Zhao, Yangbo Yi
  • Patent number: 9712064
    Abstract: A power conversion method of a power conversion device including a primary-side port disposed in a primary-side circuit and a secondary-side port disposed in a secondary-side circuit magnetically coupled to the primary-side circuit with a transformer is provided, in which transmission power transmitted between the primary-side circuit and the secondary-side circuit is adjusted by changing a phase difference between switching of the primary-side circuit and switching of the secondary-side circuit. The power conversion method includes: determining whether the phase difference is zero; stopping transmission of electric power from the secondary-side circuit to the primary-side circuit when the phase difference is zero, the voltage of the primary-side port is equal to or greater than the first specified value, and the voltage of the secondary-side port is greater than the second specified value.
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: July 18, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Takahiro Hirano
  • Patent number: 9711101
    Abstract: An analogy voltage source circuit and a display apparatus. The circuit comprises: a voltage input terminal, a DC-DC converting circuit, a voltage output terminal, a duty ratio control circuit and an output voltage sampling circuit, wherein the output voltage sampling circuit is configured to feed back magnitude of an output voltage to the duty ratio control circuit, and the duty ratio control circuit is configured to control the magnitude of the output voltage of the DC-DC converting circuit according to the feedback of the output voltage sampling circuit. The circuit further comprises: a voltage regulating circuit having an input terminal for inputting a voltage regulating signal and an output terminal connected to the output voltage sampling circuit. The voltage regulating circuit controls to increase or decrease the feedback of the output voltage sampling circuit according to the voltage regulating signal, such that the output voltage from the voltage output terminal increases or decreases.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: July 18, 2017
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Xiaopeng Liu
  • Patent number: 9692307
    Abstract: Power conversion apparatus converts input voltage and supplies output voltage to the electric load. The apparatus includes a semiconductor switch switches between open and closed states to regulate voltage control current for controlling output voltage, a first voltage detection section detects remote voltage being applied to the electric load as output voltage, a second voltage detection section detects a local voltage being applied to the output terminal as output voltage, a target current calculation section calculates target current which is the voltage control current target value, based on voltage deviation between target voltage which is the output voltage target value and either remote voltage or local voltage, and a switch control section controls the semiconductor switch so voltage control current becomes target current, to regulate output voltage to target voltage.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: June 27, 2017
    Assignee: Denso Corporation
    Inventors: Seiji Iyasu, Kimikazu Nakamura, Yuuichi Handa
  • Patent number: 9570986
    Abstract: Systems and methods are provided for regulating a power conversion system. An example system controller includes a first controller terminal and a second controller terminal. The first controller terminal is configured to receive a first signal associated with an input signal for a primary winding of a power conversation system. The second controller terminal is configured to output a drive signal to a switch to affect a first current flowing through the primary winding of the power conversion system, the drive signal being associated with an on-time period, the switch being closed during the on-time period. The system controller is configured to adjust a duration of the on-time period based on at least information associated with the first signal.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: February 14, 2017
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Xiangkun Zhai, Yunchao Zhang, Jun Zhou, Lieyi Fang
  • Patent number: 9537405
    Abstract: A controller for use in a power converter includes a drive circuit coupled to control switching of a power switch of the power converter to regulate the output of the power converter. A limit sense circuit is coupled to output a limit sense signal in response to a condition of the power converter. The drive circuit is coupled to operate in a first operation mode if there is a no limit condition. The first operation mode includes regulating the output of the power converter with a regulated output voltage and a first maximum output current. The drive circuit is coupled to operate in a second operation mode if there is a limit condition. The second operation mode regulating the output of the power converter with the regulated output voltage and a second maximum output current wherein the second maximum output current is less than the first maximum output current.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: January 3, 2017
    Assignee: Power Integrations, Inc.
    Inventors: Stefan Bäurle, David Michael Hugh Matthews
  • Patent number: 9515574
    Abstract: A modular embedded multi-level converter (MEMC) includes a first phase portion and a second phase portion. The first phase portion includes a first switch stack operable to couple a first phase branch between a positive DC bus and a midpoint node. The second phase portion includes a second switch stack operable to couple a second phase branch between the midpoint node and a negative DC bus. A DC voltage between the positive DC bus and the negative DC bus is distributable among switching units disposed in the first phase branch and the second phase branch. A distribution of the DC voltage is controlled by regulating a DC voltage at the midpoint node to balance energy among the switching units.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: December 6, 2016
    Assignee: General Electric Company
    Inventors: Di Zhang, Luis Jose Garces, Andrew Allen Rockhill
  • Patent number: 9472969
    Abstract: An adapter includes a converter unit which increases at least one of voltage and current outputted from a battery pack and supply the increased the voltage and/or the current to a load, and a characteristic detection unit which detects at least one of the voltage outputted from the battery pack, the current outputted from the battery pack, a temperature of the battery pack, a voltage inputted to the load, a current inputted to the load and a temperature of the converter unit. The adapter further includes a control unit configured to control the converter unit to increase each of said at least one of the voltage and the current outputted from the battery pack to a corresponding reference value and perform a control operation of suppressing such increase to prevent an occurrence of over-current or over-discharge based on at least one detection result.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: October 18, 2016
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hiroyuki Kaizo, Tadashi Arimura, Toshiharu Ohashi
  • Patent number: 9405650
    Abstract: An apparatus for monitoring the health of a peripheral component of an information handling system. An aggregation logic circuit coupled to a communication path provides data communication with each of a plurality of electrical circuits disposed on the peripheral component, the aggregation logic circuit providing a feedback signal representative of the health of the peripheral component during operation of the peripheral component.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: August 2, 2016
    Assignee: Dell Products L.P.
    Inventors: Timothy Michael Lambert, Pedro Lopez, Jinsaku Masuyama
  • Patent number: 9136079
    Abstract: An electronic trip unit having a number of trip unit settings includes: a first input member; a second input member; a multi-position selector configured to select one of plurality of positions corresponding to values of the trip unit settings; a plurality of indicators each corresponding to one of the plurality of trip unit settings; and a processor having a routine, wherein the routine of the processor is structured to, in response to actuation of the first input member, increment a ring counter value and selectively activate one of the indicators corresponding to the ring counter value; and wherein the routine of the processor is further structured to, in response to actuation of the second input member, set a value of the trip unit setting corresponding to the activated indicator based on the selected position of the multi-position selector.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: September 15, 2015
    Assignee: EATON CORPORATION
    Inventors: Harry J. Carlino, David R. Rohn, Jon E. Hymel
  • Patent number: 9136688
    Abstract: The method of detecting an arc fault in a power circuit includes determining a first signal related to current flowing in the power circuit is determined and analyzing the first signal to determine whether the signal indicates the presence of an electric arc in the power circuit. In case the first signal indicates the presence of an electric arc in the power circuit, means for suppressing an electric arc are activated. A second signal related to current flowing in the power circuit is then determined and analyzed. An occurrence of an arc fault in the power circuit is signaled if the second signal does not indicate the presence of an electric arc. The system for detecting an arc fault is designed to perform a corresponding method.
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: September 15, 2015
    Assignee: SMA Solar Technology AG
    Inventors: Joachim Laschinski, Marcel Kratochvil, Markus Hopf, Andreas Falk
  • Patent number: 9065273
    Abstract: A power adaptor for converting an alternating voltage into a direct voltage to a load is disclosed. The power adaptor includes a primary side circuit including a hot line, a neutral line for receiving the alternating voltage, and a return terminal, a secondary side circuit including a positive output terminal and a negative output terminal for outputting the direct voltage, and a protection circuit including a first non-linear resistor coupled to the return terminal of the primary side circuit and the negative output terminal of the secondary side circuit forming an electrostatic discharge path for an electrostatic current generated by the load.
    Type: Grant
    Filed: May 16, 2013
    Date of Patent: June 23, 2015
    Assignee: Wistron Corporation
    Inventors: Lung-Fai Tuen, Chiu-Hsien Chang
  • Patent number: 9041339
    Abstract: A system and method for digital management and control of power conversion from battery cells. The system utilizes a power management and conversion module that uses a CPU to maintain a high power conversion efficiency over a wide range of loads and to manage charge and discharge operation of the battery cells. The power management and conversion module includes the CPU, a current sense unit, a charge/discharge unit, a DC-to-DC conversion unit, a battery protection unit, a fuel gauge and an internal DC regulation unit. Through intelligent power conversion and charge/discharge operations, a given battery type is given the ability to emulate other battery types by conversion of the output voltage of the battery and adaptation of the charging scheme to suit the battery.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: May 26, 2015
    Assignee: Solaredge Technologies Ltd.
    Inventors: Meir Adest, Lior Handelsman, Yoav Galin, Amir Fishelov, Guy Sella
  • Publication number: 20150138852
    Abstract: An exemplary method for operating a converter to supply electrical power to a load includes controlling the converter for a provided overload time so that overload power is applied to the load, and controlling the converter for a provided resting time, so that resting power is applied to the load. The overload power is higher than a nominal power which corresponds to a steady-state operation limit of the converter, wherein the resting power is lower than the nominal power.
    Type: Application
    Filed: January 29, 2015
    Publication date: May 21, 2015
    Applicant: ABB Technology AG
    Inventors: Daniel SIEMASZKO, John Eckerle, Ata Douzdouzani, Klaus Ruetten
  • Patent number: 9036382
    Abstract: Methods and apparatus are presented for detecting phase loss and/or excessive ripple in a power converter, in which bandpass filters are used to obtain harmonic voltage amplitudes associated with the power converter DC bus, and phase loss is detected if a ratio of the second harmonic to the sixth harmonic and/or a ratio of the fourth harmonic to the sixth harmonic exceed predetermined threshold values.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: May 19, 2015
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Bing Li, David Leggate, Timothy Rowan
  • Patent number: 9035583
    Abstract: The system has a driving circuit for the motor of the electric fan, coupled to the electrical system of a motor vehicle and having a plurality of controlled electronic switches, and an electronic control unit arranged to control the driving circuit in such a way as to cause the flow in the motor of a variable average current capable of producing a required speed of rotation, in accordance with a predetermined relationship or function. The control unit is designed to store a predetermined threshold of rotation speed, and to control the motor through the associated driving circuit in such a way that when the rotational speed of the motor exceeds the threshold the driving circuit causes electrical braking of the motor.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: May 19, 2015
    Assignee: GATE S.R.L.
    Inventors: Davide Cerrato, Pierfranco Pangella
  • Publication number: 20150124499
    Abstract: An active damper and a power supply according to exemplary embodiments include: a damper resistor coupled to an input voltage; a damper switch coupled in parallel with the damper resistor; and a capacitor to which a reset current generated by a leading edge of the input voltage flows. The damper switch is turned off by the reset current.
    Type: Application
    Filed: October 29, 2014
    Publication date: May 7, 2015
    Inventors: Hyun-Chul EUM, Young-Jong KIM
  • Publication number: 20150109835
    Abstract: In one embodiment, an output overvoltage protection method for a switching power supply, can include: (i) charging a first capacitor by a first current during a first time interval of a switching period of the switching power supply; (ii) charging a second capacitor by a second current during a second time interval of the switching period of the switching power supply; and (iii) generating an overvoltage protection signal by comparing a first voltage across the first capacitor against a second voltage across the second capacitor at the end of the second time interval, where the overvoltage protection signal is active when the first voltage is at least as high as the second voltage.
    Type: Application
    Filed: October 8, 2014
    Publication date: April 23, 2015
    Inventor: Xiaoru Xu
  • 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: 8964428
    Abstract: A power conversion device according to embodiments includes a plurality of switch groups, a plurality of inductors, and a snubber circuit. The switch groups are respectively provided for input phases and each of the switch groups has a plurality of one-way switches that connects the corresponding input phase and output phases. The plurality of inductors are respectively connected between the input phases and the switch groups, and are coupled to one another so that current flowing through the one-way switch of one switch group moves to and continues to flow through the turned-on one-way switch of the other switch group when the one-way switch of the one switch group is turned off. The snubber circuit clamps a voltage based on the maximum voltage occurring on the plurality of inductors to a predetermined value.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: February 24, 2015
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventor: Katsutoshi Yamanaka
  • Publication number: 20150049526
    Abstract: A converter receives input of an AC voltage, converts the AC voltage into a DC voltage, and applies the DC voltage between a first power line on a positive electrode side and a second power line on a negative electrode side. A snubber circuit has a capacitor provided between the first and the second power lines, and a diode connected in series with the capacitor between the first and the second power lines, and including an anode on a side close to the first power line on the positive electrode side in a series path with the capacitor. An inverter converts the DC voltage into an AC voltage, and applies the AC voltage to an inductive load. An inverter-side current detection unit detects a current that flows through the first power line on the positive electrode side or the second power line on the negative electrode side between the inverter and the snubber circuit.
    Type: Application
    Filed: January 23, 2013
    Publication date: February 19, 2015
    Inventors: Sumio Kagimura, Toshiaki Satou, Shinichi Ishizeki
  • Publication number: 20150016157
    Abstract: The constant switching frequency discontinuous current mode average output current control scheme is composed of a reference block, reference calculation block, state detecting block, error detector block, zero state detector, power driver block and internal clock.
    Type: Application
    Filed: July 9, 2013
    Publication date: January 15, 2015
    Inventors: Qi Cui Wei, Da Feng Weng
  • Publication number: 20150009729
    Abstract: A circuit includes a switching module, a control module, and a driving module. The driving module is electrically coupled between the control module and the switching module for generating a driving signal. The driving module includes a normal driving unit and a fault protection unit. The normal driving unit is for turning on and off the switching module according to a first command signal from the control module. The fault protection unit is for lowering the driving signal from a driving value to a protection value according to a second command signal from the control module during a fault protection period after the control module receives a fault signal.
    Type: Application
    Filed: July 3, 2014
    Publication date: January 8, 2015
    Inventors: Tao WU, Ying ZHANG, Laigui QIN, Yingqi ZHANG, Fan ZHANG, Xin HAO
  • Publication number: 20150003127
    Abstract: A multilevel power conversion circuit using a flying capacitor(s) can include two bidirectional switches connected in series between a middle potential terminal of DC power supplies and a conversion circuit using semiconductor switches. Gate driving circuits for the bidirectional switches are provided with a short-circuit fault detecting circuit for detecting short-circuit of the semiconductor switching device composing the bidirectional switch circuit in an OFF signal period. Upon detection of a short-circuit fault, all semiconductor switching devices are interrupted to stop the whole system.
    Type: Application
    Filed: June 11, 2014
    Publication date: January 1, 2015
    Inventor: Satoki TAKIZAWA
  • Publication number: 20150003126
    Abstract: There is provided a power supply device having a primary side on which a primary winding of a transformer is located and a secondary side on which a secondary winding of the transformer is located, and supplying power to a load, the device including: a photo coupler transmitting load short-circuit information from the secondary side to the primary side, a standby power supply terminal supplying power to the photo coupler; and a current passing unit connecting the photo coupler to the load.
    Type: Application
    Filed: September 20, 2013
    Publication date: January 1, 2015
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Don Sik KIM, Dong Jin LEE, Jae Cheol JU, Jae Hak LEE, Hong Sun PARK
  • Publication number: 20140369094
    Abstract: It is presented a converter cell comprising: a first terminal and a second terminal; an energy storage device connected on a first end to the second terminal; a first switch connected on a first end to the first terminal; a second switch arranged between the two terminals; and a third switch connected between a second end of the first switch and a second end of the energy storage device. A corresponding converter arm and method are also presented.
    Type: Application
    Filed: November 11, 2011
    Publication date: December 18, 2014
    Applicant: ABB Technology AG
    Inventor: Falah Hosini
  • Publication number: 20140369093
    Abstract: Exemplary embodiments provide a method and an adaptive RCD snubber circuit for a switching converter having a series-connection of a main inductor and a main switching device. A voltage stress of the main switching device is sensed, and the sensed voltage stress is controlled to a reference level by controlling a snubber capacitor voltage, wherein the snubber capacitor voltage is controlled by adjusting the snubber resistance of the RCD snubber.
    Type: Application
    Filed: June 17, 2014
    Publication date: December 18, 2014
    Applicant: ABB RESEARCH LTD,
    Inventors: Ki-Bum PARK, Francisco CANALES, Sami PETTERSSON
  • Publication number: 20140362621
    Abstract: Systems and methods are provided for protecting a power conversion system. A system controller includes a two-level protection component and a driving component. The two-level protection component is configured to detect an output power of a power conversion system and generate a protection signal based on at least information associated with the output power. The driving component is configured to generate a drive signal based on at least information associated with the protection signal and output the drive signal to a switch associated with a primary current flowing through a primary winding of the power conversion system. The driving component is further configured to generate the drive signal corresponding to a first switching frequency to generate the output power equal to a first power threshold and generate the drive signal corresponding to a second switching frequency to generate the output power equal to a second power threshold.
    Type: Application
    Filed: July 22, 2013
    Publication date: December 11, 2014
    Applicant: ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Xiaomin Huang, Huawei Lv, Chao Yao, Qiang Luo, Lieyi Fang
  • Patent number: 8908398
    Abstract: A method for operating a converter circuit is provided. The converter circuit includes a converter unit and a transformer. The transformer includes at least one winding set with a primary winding and a secondary winding. The converter unit is connected, on the AC voltage side, to the primary winding of the respective winding set. In order to compensate for undesirable saturation of the transformer, the converter unit is used to deliberately apply a DC voltage to the primary winding of the respective winding set of the transformer.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: December 9, 2014
    Assignee: ABB Technology AG
    Inventors: Beat Buchmann, Beat Ronner
  • Patent number: 8885377
    Abstract: A matrix converter according to an embodiment includes a control unit generates a highest phase-to-phase voltage among load side phase-to-phase voltages by controlling bidirectional switches that connect phases with respect to the highest phase-to-phase voltage and phases with respect to a highest phase-to-phase voltage among AC-source side phase-to-phase voltages. Moreover, the control unit generates a middle phase-to-phase voltage among the load side phase-to-phase voltages by controlling bidirectional switches that connect phases with respect to the middle phase-to-phase voltage and phases with respect to a middle phase-to-phase voltage among the AC-source side phase-to-phase voltages.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: November 11, 2014
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventor: Eiji Yamamoto
  • Patent number: 8878476
    Abstract: A PCU drives a motor generator using electric power from a power storage device. The PCU includes a power conversion device, a capacitor and a control unit. When detecting a crash, the control unit drives the power conversion device and discharges charges remaining in the capacitor. Each of a plurality of reverse conducting-type semiconductor elements included in the power conversion device is integrally formed of a first semiconductor element operating as a switching element and a second semiconductor element operating as a free wheeling diode. In response to detection of the crash of a vehicle, the control unit changes a voltage applied to a gate terminal of the first semiconductor element and increases an electric power loss during a current-circulating operation by the second semiconductor element. As a result, the remaining charges stored in the capacitor in the drive apparatus is discharged as soon as possible.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: November 4, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Satoshi Hirose
  • Patent number: 8873256
    Abstract: A method and apparatus of operating a controller usable for operating a wind turbine is provided. The wind turbine includes a voltage converter being connectable to a power grid via a filter arrangement. The method includes determining a line voltage and adding the determined line voltage to the output of the voltage converter with a time delay. The time delay is adjusted such that resonant effects occurring at the filter arrangement are decreased.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: October 28, 2014
    Assignee: Vestas Wind Systems A/S
    Inventor: Eng Kian Kenneth Sng
  • Publication number: 20140313797
    Abstract: In the field of voltage source converters which provide high voltage direct current (HVDC) power transmission and reactive power compensation there is a need for an improved power electronic module which exhibits high efficiency, provides a safe failure mode, and is tolerant of faults. A power electronic module (30; 70), for use in a chain-link converter of a voltage source converter providing high voltage direct current power transmission and reactive power compensation, comprises a first set (32) of series-connected switching elements connected in parallel with an energy storage device (34). The first set (32) of series-connected switching elements includes a first latching switching element (38) and a first non-latching switching element (40).
    Type: Application
    Filed: November 15, 2011
    Publication date: October 23, 2014
    Applicant: ALSTOM TECHNOLOGY LTD.
    Inventors: Colin Charnock Davidson, David Reginald Trainer
  • Publication number: 20140313796
    Abstract: A converter valve unit including a plurality of parallel connected controllable semiconducting elements. A free-wheeling diode is connected in anti-parallel with each semiconducting element. A control unit is configured to control each semiconducting element. A current sensor is connected to each of the parallel connected semiconducting elements. The current sensor is configured to sense a current of each semiconducting element by measuring a voltage over the current sensor. A differentiator is configured to compare the currents of the semiconducting elements by comparing the voltages. Upon detecting an unbalance in the currents the differentiator sends a turn-on signal to all control units to control all the semiconducting elements of the valve unit into a conducting stage.
    Type: Application
    Filed: April 21, 2014
    Publication date: October 23, 2014
    Applicant: ABB RESEARCH LTD.
    Inventor: Hans Peter NEE