Cooperating Separate Sensing And Control Means Patents (Class 363/78)
  • Patent number: 11962145
    Abstract: Systems and methods herein use a sensing circuit to detect an overvoltage at a voltage node as a drain current. A current-mode comparator converts the detected current into a control signal, which is provided to a control circuit. The control circuit uses the control signal cut of a bias current to turn off switches in a protection circuit to create a high-impedance electrical path between the voltage node and the to-be-protected voltage node.
    Type: Grant
    Filed: May 13, 2022
    Date of Patent: April 16, 2024
    Assignee: Maxim Integrated Products, Inc.
    Inventor: Gabriel Eugen Tanase
  • Patent number: 11929670
    Abstract: Systems, methods, and devices for converting electric power are disclosed. Converter modules convert power in a configurable manner in conjunction with a controller.
    Type: Grant
    Filed: August 3, 2023
    Date of Patent: March 12, 2024
    Assignee: CisLunar Industries USA, Inc.
    Inventors: Steven R Ward, Jan Walter Schroeder, Joseph W Pawelski, Toby Joseph Daniel Mould
  • Patent number: 11805582
    Abstract: A lamp circuit including a light emitting circuit and a light emission control circuit that controls the light emitting circuit. The light emitting circuit includes a thermistor and a light emitting device, and the light emission control circuit comprised a constant current circuit, dimming control circuit, voltage divider having a first resistor and a second resistor, and a current amplification circuit. The current amplification circuit amplifies a current of the thermistor, and the voltage divider divides a first voltage to a first node between the first resistor and the second resistor based on the amplified current. The dimming control circuit controls an output current of the constant current circuit based on the first voltage, and the constant current circuit outputs a current to the light emitting device based on the control of the dimming control circuit.
    Type: Grant
    Filed: July 18, 2022
    Date of Patent: October 31, 2023
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventor: Won Seok Chae
  • Patent number: 11728744
    Abstract: A voltage source converter having first and second DC terminals for connection to a DC network is provided. The voltage source converter includes at least one converter limb that extends between the first and second DC terminals and first and second limb portions that are separated by a respective AC terminal for connection to a corresponding phase of an AC network. Each limb portion includes a chain-link converter which is defined by a plurality of series-connected switching modules which operate in combination to provide a stepped variable voltage source. The voltage source converter includes a control apparatus configured to coordinate operation of the chain-link converters to cause an exchange of power between the DC and AC networks, evaluate the performance of one of the pluralities of series-connected switching modules, and modify the operation of the respective chain-link converter when the performance becomes degraded to a predetermined amount.
    Type: Grant
    Filed: August 19, 2019
    Date of Patent: August 15, 2023
    Assignee: General Electric Technology GmbH
    Inventors: Pablo Ariel Briff, Huy Quoc Si Dang, Richard S. Zhang, Guillaume De Preville, Stéphane Pierre Brehaut, Omar Jasim
  • Patent number: 11722058
    Abstract: An emulated current generation circuit of a power converting circuit, providing an emulated current includes an AC component current and a DC component current, includes a first current circuit, a second current circuit, a combination circuit and a calibration circuit. The first current circuit generates a ramp signal as the AC component current. The second current circuit is coupled to an output stage of power converting circuit to provide a sensing current. The DC component current is generated after performing a sample-and-hold processing on the sensing current. The combination circuit is coupled to the first current circuit and second current circuit respectively to combine the AC component current and DC component current into an emulated sensing current. The calibration circuit is coupled to the first current circuit, second current circuit and combination circuit to dynamically adjust the ramp signal according to the emulated sensing current and sensing current.
    Type: Grant
    Filed: April 12, 2021
    Date of Patent: August 8, 2023
    Assignee: UPI SEMICONDUCTOR CORP.
    Inventors: Chao-Wei Tseng, Yow-Tsyr Liang
  • Patent number: 11705808
    Abstract: A control circuit for a power factor correction (PFC) circuit, the control circuit includes a multiplier having first, second, and third multiplier inputs and a multiplier output. The control circuit has an adder having first and second inputs and an output. The first input of the adder is coupled to the multiplier output. The control circuit further includes a root mean square (RMS) calculation circuit configured to determine a square of a root mean square of an input sinusoidal voltage. The RMS calculation circuit has an output coupled to the second multiplier input. An input voltage square calculation circuit is configured to determine a square of the input sinusoidal voltage. The input voltage square calculation circuit has an output coupled to the third multiplier input.
    Type: Grant
    Filed: September 30, 2021
    Date of Patent: July 18, 2023
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Bosheng Sun
  • Patent number: 11682904
    Abstract: A method comprises, at a power balancing circuit for three-phase AC power: feeding three power phases to respective loads; measuring power drain on the three power phases by the respective loads; based on measuring, detecting an unbalanced power drain across the three power phases due to a relatively light power drain on one or more lightly loaded power phases and a relatively high power drain on one or more heavily loaded power phases; computing an amount of power to be drained from the one or more lightly loaded power phases and to be fed to the one or more heavily loaded power phases to balance the power drain across the three power phases; and transferring the amount of power from the one or more lightly loaded power phases to the one or more heavily loaded power phases to balance the power drain across the three power phases.
    Type: Grant
    Filed: September 24, 2021
    Date of Patent: June 20, 2023
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Xiqun Zhu, Sung Kee Baek, Robert Gregory Twiss
  • Patent number: 11671028
    Abstract: An AC-to-AC modular multilevel converter (MMC) is configured to be connected between a three-phase AC system and a single-phase AC system. The MMC includes a number of converter arms connected in a ring to allow a circulating current to be circulated in the ring through each of the converter arms. Each converter arm includes series-connected converter cells. Phase terminals are arranged in the ring between the converter arms such that each of the converter arms is separated from neighboring converter arms by at least one of the phase terminals. The phase terminals include respective terminals for each of a first phase, a second phase and a third phase of the three-phase AC system and respective terminals for each of a positive conductor and a negative conductor of the single-phase AC system.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: June 6, 2023
    Assignee: Hitachi Energy Switzerland AG
    Inventors: Thomas Schaad, Michail Vasiladiotis, Jan Svensson, Georgios Stamatiou
  • Patent number: 11474260
    Abstract: A Weil code generator and a method of generating Weil codes with a Weil code length (N) are provided. The Weil code generator includes a plurality of parallel channels (10), a multi-channel read arbiter (20), and two parallel Legendre ROMs (30), which are connected in series. A channel of the plurality of channels stores a current Weil code to demodulate signals from a satellite. The multi-channel read arbiter (20) may determine a win channel from the plurality of channels. The two Legendre ROMs (30) respectively store a first and a second Legendre sequences (LS1, LS2) each having a Legendre sequence length (2N) being double the Weil code length (N). The Weil code generator may generate Weil codes efficiently.
    Type: Grant
    Filed: June 14, 2021
    Date of Patent: October 18, 2022
    Assignee: Beken Corporation
    Inventors: Weifeng Wang, Jiazhou Liu, Pengfei Zhang, Dawei Guo
  • Patent number: 11233456
    Abstract: Operating power converters. Some of the methods include: storing energy in a transformer arranged for flyback operation, the storing by making conductive a primary switch coupled to a primary winding of the transformer; and then ceasing the storing of energy; determining on time of the primary switch during the storing of energy, the determining creates a value indicative of charge time; transferring energy from the transformer to a load through a secondary winding of the transformer; measuring discharge time of the energy from the transformer during the transferring, the measuring of the discharge time creates a value indicative of discharge time; calculating a value indicative of output voltage of the power converter using the value indicative of charge time and the value indicative of discharge time; and then compensating a charge time of a subsequent energy storage cycle, the compensation based on the value indicative of output voltage.
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: January 25, 2022
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Christophe Basso, Yann Vaquette, Joel Turchi
  • Patent number: 11146071
    Abstract: A coordinated control method for series voltage source converter valve groups comprises: allocating a total direct-current voltage reference value or a total active power reference value at the end where a direct-current electrode series voltage source converter valve group is located according to the total number of voltage source converter valve groups in series; for a direct-current voltage control end, controlling the direct-current voltage of each valve group according to the assigned direct-current voltage reference value for each valve group; for an active power control end, controlling the active power of each valve group according to the assigned active power reference value for each valve group and based on adding the active power compensation amount of the valve group which has voltage equalization effects on the valve group. Correspondingly, also providing a coordinated control device for series voltage source converter valve groups.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: October 12, 2021
    Assignees: NR ELECTRIC CO., LTD., NR ENGINEERING CO., LTD.
    Inventors: Jiang Lu, Yu Lu, Yunlong Dong, Yongping Wang, Jie Tian, Haiying Li, Zhaoqing Hu, Nannan Wang, Ke Wang, Jiudong Ding
  • Patent number: 11114939
    Abstract: A power supply system includes a current driver circuit, a sensor circuit, a control circuit, a voltage generator circuit and a signal generator circuit. The current driver circuit generates, based on a pulse signal, an output current for driving a load unit that includes series connected loads. The sensor circuit senses the output current to generate a sensed voltage. For each load, the control circuit is operable, based on a control input, to allow or not to allow the output current to flow through the load. The voltage generator circuit generates a reference voltage based on the control input. The signal generator circuit generates the pulse signal based on the reference voltage and the sensed voltage.
    Type: Grant
    Filed: June 18, 2020
    Date of Patent: September 7, 2021
    Assignee: MACROBLOCK, INC.
    Inventors: Ting-Ta Chiang, Kuan-Yu Chen
  • Patent number: 11095208
    Abstract: Disclosed in embodiments of the present invention are a control method, apparatus, device, and medium for a power factor correction (PFC) circuit, used for solving the problems of high implementation costs and relatively severe THD that exist in existing PFC circuit control methods. The control method for a power factor correction (PFC) circuit, comprising: acquiring circuit parameter information of the PFC circuit; when determining that the circuit parameter information meets a preset switching condition, switching a control mode of the PFC circuit to be a continuous conduction mode (CCM).
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: August 17, 2021
    Assignee: Vertiv Corporation
    Inventors: Bo Xiang, Jian Li, Ruiguo Yang, Huaxing Fu
  • Patent number: 11064576
    Abstract: Disclosed is a device configured to inductively heat one or more objects and to wirelessly transfer power to one or more objects. The device includes a first working coil, an inverter unit configured to cause a resonant current to flow in the first working coil by performing a switching operation, a first detection unit connected to the first working coil and configured to detect the resonant current applied to the first working coil, and a control unit configured to: determine whether a target object is located at a location corresponding to the first working coil by controlling operation of the inverter unit and the first detection unit; or to control output of the first working coil.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: July 13, 2021
    Assignee: LG Electronics Inc.
    Inventors: Hyunwook Moon, Eui Sung Kim, Seungbok Ok
  • Patent number: 10884074
    Abstract: A power supply device includes an electrical connector and a power interrupt system. The electrical connector is configured to facilitate electrically coupling an electronic device to a power source to at least one of charge and power the electronic device. The power interrupt system selectively couples the power source to the electrical connector. The power interrupt system is configured to (a) provide energy to the electrical connector in response to at least one of (i) a first user request and (ii) a determination that the electronic device is coupled to the electrical connector, and (b) limit the energy provided to the electrical connector at least one of (i) in response to a second user request, (ii) in response to a determination that the electronic device is decoupled from the electrical connector, and (iii) after a threshold elapsed time.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: January 5, 2021
    Assignee: GOAL ZERO LLC
    Inventors: Sterling Robison, Walker Ford, Keyvan Vasefi, Norman L. Krantz, Henry J. Howell
  • Patent number: 10855272
    Abstract: A gate drive apparatus is provided. The gate drive apparatus includes a gate drive unit configured to drive a gate of a switching device; a parameter measuring unit configured to measure a parameter corresponding to current flowing through the switching device; a discrepancy detection unit configured to detect discrepancy between current flowing through the switching device during an on-state of the switching device and a reference value, based on the parameter; and a control unit that, if the discrepancy is not detected, switches a change speed of a gate voltage of the switching device at a timing when a reference time has elapsed since a turn-off start of the switching device during a next turn-off time period of the switching device, and if the discrepancy is detected, keeps the change speed of the gate voltage during the next turn-off time period of the switching device.
    Type: Grant
    Filed: February 19, 2020
    Date of Patent: December 1, 2020
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Tsuyoshi Nagano, Kunio Matsubara
  • Patent number: 10673346
    Abstract: The present disclosure proposes a circuit for reducing power consumption and a liquid crystal. The circuit includes a transformer, a first output loop, and a second output loop. The transformer includes a secondary driving winding with a first output terminal, a ground terminal, and a second output terminal arranged between the first output terminal and the ground terminal. When a voltage output by the second output terminal is less than a predetermined voltage, the first output loop is conducted and the second output loop is terminated. When a voltage output by the second output terminal is greater than the predetermined voltage, the first output loop is terminated and the second output loop is conducted.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: June 2, 2020
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: XueKun Yu, Wendong Li
  • Patent number: 10637466
    Abstract: In a driving device for driving a plurality of semiconductor switches connected in parallel to each other, a charge side conduction element is disposed in a charge side loop path including a conduction control terminal and a low-potential side conduction terminal of one of the semiconductor switches, and enables a charging current to flow in a conductive state. A discharge side conduction element is disposed in a discharge side loop path including the conduction control terminal and the low-potential side conduction terminal, and enables a discharging current to flow in a conductive state. A voltage detection unit is connected to a current output terminal of at least one of the charge side conduction element and the discharge side conduction element. A resistive element is connected in parallel to at least one of the charge side conduction element and the discharge side conduction element.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: April 28, 2020
    Assignee: DENSO CORPORATION
    Inventors: Kazuki Yamauchi, Yasutaka Senda
  • Patent number: 10578660
    Abstract: A reactance measurement apparatus has a series circuit has a first circuit including a first resistor and a second circuit including a reactance element, a first voltage generation unit for generating a first AC voltage to apply the same to the series circuit, a second voltage generation unit for generating a second AC voltage having a phase difference with respect to the first AC voltage, a multiplication unit for multiplying the second AC voltage and a second circuit voltage to generate a multiplication voltage, a measurement unit for measuring a voltage of a DC component of the multiplication voltage, a phase shift amount calculation unit for calculating a phase shift amount, and a reactance calculation unit for calculating a reactance of the reactance element based on the phase shift amount.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: March 3, 2020
    Assignee: ISUZU MOTORS LIMITED
    Inventor: Masafumi Noda
  • Patent number: 10547242
    Abstract: The power supply apparatus includes a transformer, a switching unit provided on a primary side of the transformer and configured to perform switching operation for converting an input voltage resulting from rectification and smoothing of an AC voltage and outputting an output voltage from a secondary side of the transformer; a first detection unit configured to detect the output voltage, a feedback unit configured to generate a feedback voltage based on the voltage detected by the first detection unit; a control unit configured to control the switching operation of the switching unit based on the feedback voltage generated by the feedback unit; and a second detection unit configured to detect the AC voltage.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: January 28, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hiroki Asano, Yasuhiro Shimura
  • Patent number: 10536093
    Abstract: Inverter systems, circuits and associated control techniques for providing efficient delivery of high-frequency (HF) power and radio-frequency (RF) power into variable load impedances while maintaining resistive/inductive loading of the constituent inverters for zero voltage switching (ZVS) are described. The inverter architecture and associated control techniques for providing efficient delivery of HF into variable load impedances includes a first inverter having an output coupled to an input of an immittance converter. An output of the immittance converter is coupled to a second inverter. The second inverter maybe either serially or parallel coupled between the output of the immittance converter and a load.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: January 14, 2020
    Assignee: Massachusetts Institute of Technology
    Inventor: David J. Perreault
  • Patent number: 10257056
    Abstract: Power management techniques in distributed communication systems are disclosed herein. Related components, systems, and methods are also disclosed. In embodiments disclosed herein, services within a remote unit of the distributed communication system are selectively activated and power consumption is measured. From at least two measurements, a maximum power available may be calculated and compared to power requirements of the remote unit.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: April 9, 2019
    Assignee: Corning Optical Communications LLC
    Inventors: Ami Hazani, Shlomo Zilberman
  • Patent number: 10153652
    Abstract: The present disclosure provides a charging system that includes a charging adapter and a mobile terminal. The charging adapter includes: a second USB interface; and an adjusting circuit for rectifying and filtering the mains supply to obtain an original power signal, for performing a voltage adjustment on the original power signal, and for outputting a power signal after the voltage adjustment. The mobile terminal includes a first USB interface. P first power wires in the first USB interface and P second power wires in the second USB interface are correspondingly coupled, and Q first ground wires in the first USB interface and Q second ground wires in the second USB interface are correspondingly coupled. Because each first power wire and a corresponding second power wire are coupled, at least two charging circuits can be provided, and the charging system supports charging with a large current more than 3 A.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: December 11, 2018
    Assignee: Guangdong Oppo Mobile Telecommunications Corp., Ltd.
    Inventors: Jialiang Zhang, Fengshuo Liu, Biao Chen, Kewei Wu
  • Patent number: 10099563
    Abstract: Provided are a power supply device for a vehicle provided with a battery, a converter, and a controller, and a method for controlling the same. The controller controls the converter in a continuous boost mode in which the converter is continuously operated and an intermittent boost mode in which the converter is intermittently operated. The controller does not control the converter in the intermittent boost mode when a control that adjusts a reference point of a resolver of a motor generator is underway.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: October 16, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Suguru Kumazawa, Hideki Kamatani, Ryoji Sato
  • Patent number: 10074988
    Abstract: This application relates to control methods and apparatus for a voltage source converter comprising a plurality of energy storage devices which can be selectively connected into an arm of the voltage source converter. The apparatus is configured to generate a modelled value of the voltage of an energy storage device of the voltage source converter based on one or more model parameters and the operation of the voltage source converter, receive the modelled value and also a measured value of the voltage of at least one energy storage device, determine an error between the modelled value and the measured value, and generate a model control signal for adapting the model based on said error so that the modelled value substantially corresponds to the measured value. Control circuitry is responsive to said model module and/or said model adaptation module to control operation of the voltage source converter.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: September 11, 2018
    Assignee: ALSTOM TECHNOLOGY LTD
    Inventor: Colin Oates
  • Patent number: 10063059
    Abstract: Controlling a wind power plant comprising at least one wind turbine generator for producing power to an electrical grid where the amount of said power is based on a signal response in a voltage signal in said electrical grid due to a change in power output into said electrical grid.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: August 28, 2018
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Bo Hesselbæk, Martin Hogdahl Zamastil
  • Patent number: 10061280
    Abstract: Embodiments of the present invention comprise systems and methods for providing power from DC output ports, typically smart ports, to electronic devices, not necessarily having smart input DC ports. A power adapter cable is provided comprising a control unit that adapts between a smart output port and a DC input port that may not be compatible with the smart output port. Also provided embodiments of a power adapter hub wherein the power supplied through its output ports is selectively reduced in the case of overload, according to a predefined policy.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: August 28, 2018
    Assignee: ADVANCED MAGNETIC SOLUTIONS LIMITED
    Inventor: Zeev Shpiro
  • Patent number: 9979214
    Abstract: An adaptive buck converter of a charging cable includes: a power receiving interface for receiving a DC voltage and a cable current from a cable; a terminal communication interface for transmitting a charging voltage and a charging current to a connection terminal of the charging cable and for receiving a communication signal generated by the mobile device from the connection terminal; a power converting circuit for receiving the DC voltage and the cable current from the power receiving interface and for generating the charging voltage and the charging current, wherein the charging voltage is lower than the DC voltage while the charging current is greater than the cable current; and a data processing circuit coupled with the power converting circuit and configured for controlling the power converting circuit according to the communication signal.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: May 22, 2018
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Ta-Yung Yang, Jing-Meng Liu, Isaac Y. Chen, Tzu-Chen Lin
  • Patent number: 9729080
    Abstract: A power supply control circuit, which is connected to a stabilized direct current power supply having a pair of first and second output terminals and a pair of first and second remote sensing terminals, includes: a current detector configured to detect an output current that is supplied to a load from the stabilized direct current power supply, and to output a current detection voltage; a current difference output unit configured to output a current difference voltage corresponding to a voltage difference between the current detection voltage and a current setting voltage; and a control voltage generator configured to generate a control voltage and output the control voltage to the first remote sensing terminal so as to perform a constant current control operation. The current detector, the current difference output unit and the control voltage generator are operated by only the direct current voltage supplied by the auxiliary power supply.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: August 8, 2017
    Assignee: TDK Corporation
    Inventor: Akira Maeda
  • Patent number: 9455618
    Abstract: The present disclosure provides a method for controlling a multilevel converter, the method including, detecting modulation state values and current directions of sub-modules, and designating, by one sub-module, an average number of switching for each period of an output waveform, wherein the step of designating the average number of switching includes, grouping the sub-modules according to being in ON state or in OFF state, comparing the number of sub-modules in previous ON state and the number of sub-modules in OFF state to obtain a difference therebetween, and changing a state as much as the difference, comparing a sub-module of ON state in charged state and in discharged state with a sub-module of OFF state, and changing the compared states of sub-modules of ON state and OFF state.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: September 27, 2016
    Assignees: LSIS CO., LTD., Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Gum Tae Son, Kyeon Hur, Jung Wook Park, Hee Jin Lee, Tae Sik Nam, Yong Ho Chung, Seung Taek Baek, Wook Hwa Lee
  • Patent number: 9312553
    Abstract: Disclosed herein is an apparatus for controlling a fuel cell system, including: a plurality of stack state detecting units for detecting respective states of a plurality of fuel cell stacks; a switching unit for connecting at least parts of the plurality of fuel cell stacks to each other in series or in parallel; and a control unit for detecting at least one degraded stack based on the states of the stacks detected by the plurality of stack state detecting units, and forming at least one degraded stack unit including the detected at least one degraded stack by controlling the operation of the switching unit, so the apparatus can quickly and easily connect the stacks to each other in series, in parallel or in series-parallel using cheap electric switches instead of using a plurality of power conditioning system (PCS).
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: April 12, 2016
    Assignee: SK INNOVATION CO., LTD.
    Inventors: Kyung Bin Yoo, Young Dae Kim, Seong Je Wu, Su Hyun Lee, Byung Hee Kang, Jeong Pyo Lee
  • Patent number: 9214804
    Abstract: A switched mode power supply includes a switching device, the switched mode power supply being operable to convert an input voltage (Vin) to an output voltage (Vout) by switching the switching device, and a voltage regulator operable to generate a feedback signal based on at least one of the output voltage and an output current of the switched mode power supply. The power supply further comprises an overload detector, which is arranged to receive the feedback signal and operable to determine whether the feedback signal is outside a predetermined range. If the feedback signal is outside the predetermined range, the overload detector is operable to determine that the switched mode power supply is in an overload state, and when an overload state is determined, perform control to place the switched mode power supply in a non-operational state.
    Type: Grant
    Filed: November 11, 2010
    Date of Patent: December 15, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Oscar Persson, Mikael Appelberg
  • Patent number: 9136769
    Abstract: A pulse scheme is used for load change detection in a switching mode power supply with low no-load power consumption. The pulse scheme includes a measurement pulse for determining a load condition or a no-load condition at the output. Generation of the measurement pulse results in sufficient energy transfer to the secondary side to accurately measure the output voltage via a reflected voltage on the primary side. Once in no-load operation mode, a reference pulse having a lower energy transfer than the measurement pulse is used to determine a baseline reflected voltage value that corresponds to a no-load condition. Successive detection pulses are then generated and corresponding reflected voltage measured and compared to the baseline reflected voltage. A change in the reflected value that exceeds a threshold value is indicative of a change in the no-load condition.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: September 15, 2015
    Assignee: Flextronics AP, LLC
    Inventor: Ralf Schroeder gen Berghegger
  • Patent number: 9024584
    Abstract: Disclosed is a method for setting sequential ID to a multi-slave BMS in a battery pack, the battery pack including N (N: natural number of 2 or more) slave BMSs having sequential physical locations to control a battery module containing at least one battery and a main BMS to control the N slave BMSs.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: May 5, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Jong-Min Park, Young-Gwan Kim, Hee-Sung Moon
  • Publication number: 20150078047
    Abstract: Aspects of the disclosure provide a circuit that includes a detector and a controller. The detector is configured to detect a firing start by a triode for alternating current (TRIAC) in a power supply. The controller is configured to control a switch in connection with a magnetic component in response to the firing start to shape a profile of a current pulled from the power supply to satisfy a latch current requirement and a hold current requirement of the TRIAC.
    Type: Application
    Filed: November 21, 2014
    Publication date: March 19, 2015
    Applicant: MARVELL WORLD TRADE LTD
    Inventors: Sehat SUTARDJA, Pantas Sutardja, Wanfeng Zhang
  • Publication number: 20150070952
    Abstract: An electric power converter according to an embodiment includes a switching unit, a controller, and a second bidirectional switch. The switching unit includes a plurality of first bidirectional switches disposed between a DC power source and an AC load or between a DC load and an AC power source. The controller controls the switching unit to perform power conversion between DC power and AC power. When turning off the second bidirectional switch disposed on a path between one pole of the DC power source or the DC load and the switching unit, the controller turns on the first bidirectional switch connected between the other pole of the DC power source and the AC load or between the other pole of the DC load and the AC power source.
    Type: Application
    Filed: November 13, 2014
    Publication date: March 12, 2015
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Sadao ISHII, Katsutoshi YAMANAKA, Tsuyoshi HIGUCHI, Takashi KUBOYAMA, Yutaro IHARA
  • Patent number: 8971074
    Abstract: A bias supply, a method of communicating data across an isolation barrier and a power supply are provided herein. In one embodiment, the bias supply includes: (1) a bias supply transformer having a primary winding inductively coupled to a secondary winding across an isolation barrier, (2) a controller configured to direct operation of the bias supply and (3) bias voltage manipulating circuitry, coupled to an input of the controller, configured to receive primary data and based thereon alter a secondary bias output voltage of the secondary winding between defined voltage levels by varying a voltage provided to the controller, the controller and the bias voltage manipulating circuitry located on the primary side.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: March 3, 2015
    Assignee: General Electric Company
    Inventors: Stephen C. Guthrie, Subarna Pal
  • Patent number: 8953347
    Abstract: A capacitor discharging circuit and a power converter having the capacitor discharging circuit are disclosed. The capacitor discharging circuit comprises a conversion module connected with the two terminals of the capacitor, an AC power-off detecting unit used to detect on-off state of AC power, and a control unit. The conversion module comprises an energy consumption unit. When AC power is disconnected, the AC power-off signal generated by the AC power-off detecting unit intervenes the control unit to control the energy consumption unit to consume the energy stored in the capacitor.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: February 10, 2015
    Assignee: Delta Electronics (Shanghai) Co., Ltd
    Inventors: Hongyuan Jin, Baochen Wang, Hongjian Gan, Jianping Ying
  • Patent number: 8941366
    Abstract: A DC-DC converter includes efficiency reporting circuitry having an output that is a measure of efficiency. In an example, the DC-DC converter has an input voltage, an output voltage, and a switching circuit converting the input voltage to an intermediate voltage, and the efficiency reporting circuitry determines the ratio between the output voltage and the intermediate voltage.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: January 27, 2015
    Assignee: Texas Instruments Incorporated
    Inventor: Clint Wade Halsted
  • Publication number: 20150016163
    Abstract: A detector for detecting an occurrence of a current strength of interest of a current of a signal to be sensed includes a magnetoresistive structure and a detection unit. The magnetoresistive structure varies a resistance depending on a magnetic field caused by the current of the signal to be sensed. Further, the detection unit generates and provides a current detection signal indicating an occurrence of the current strength of interest based on a detected magnitude of the varying resistance of the magnetoresistive structure.
    Type: Application
    Filed: July 11, 2013
    Publication date: January 15, 2015
    Applicant: INFINEON TECHNOLOGIES AUSTRIA AG
    Inventors: Siegfried Krainer, Wolfgang Marbler, Wolfgang Granig
  • Publication number: 20140362622
    Abstract: A method for controlling operation of a power converter is provided. The method includes determining, in a rotating dq-reference frame, a direct current error signal and a quadrature current error signal, performing a first control procedure, and performing a second control procedure. The method also includes obtaining a direct voltage control signal by subtracting a signal resulting from the second control procedure from a signal resulting from first control procedure, and obtaining a quadrature voltage control signal by adding a signal resulting from the second control procedure to a signal resulting from the first control procedure. The method includes executing a transformation from the rotating dq-reference frame to a stationary abc-reference frame based on the obtained signals, and controlling switching states of the plurality of semiconductor switches based on the signals resulting from the executed transformation from the rotating dq-reference frame to the stationary abc-reference frame.
    Type: Application
    Filed: June 4, 2014
    Publication date: December 11, 2014
    Inventors: Hamed Nademi, Lars Norum
  • Publication number: 20140306526
    Abstract: A power converter is provided that includes a detection circuit configured to determine a power source type based on at least one characteristic of power received from a power source. The detection circuit is also configured to determine an operating edge of the soft AC source by monitoring at least one parameter as the soft AC power source approaches a power limit, and assign an operating point to the soft AC power source based on the operating edge to increase power delivery of the soft AC power source.
    Type: Application
    Filed: March 3, 2014
    Publication date: October 16, 2014
    Applicant: General Electric Company
    Inventors: Edward Clark Fontana, Tab O Walter, Roy Jaescentt Davis, Palanivel Subramaniam
  • Patent number: 8842455
    Abstract: There is provided an electric-power conversion apparatus including a chopper circuit; a current sense resistor that detects the output current of the chopper circuit; a differential detection circuit that outputs, as a differential detection signal (vo), the electric potential difference across the current sense resistor; and a calculation means that corrects the differential detection signal (vo) from the differential detection circuit by use of a control signal (D1) for the chopper circuit so as to calculate the output current (i0) of the chopper circuit.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: September 23, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshihiko Kimpara, Takayuki Kifuku, Tetsuya Kojima, Tatsuya Mori
  • Publication number: 20140268950
    Abstract: In accordance with an embodiment, a method of calibrating a power supply includes coupling a reference load to an output of the power supply, setting an output voltage of the power supply to a first output voltage, measuring a current delivered to the reference load, and determining a current metric based on the measuring. The output voltage of the power supply is increased until the determined current metric crosses a first threshold, which occurs when the output of the power supply is at a second output voltage, and the power supply it set to operate at the second output voltage.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 18, 2014
    Applicant: INFINEON TECHNOLOGIES AUSTRIA AG
    Inventor: Alfredo Medina-Garcia
  • Publication number: 20140268951
    Abstract: A power converter controller includes a switch driver circuit coupled to generate a drive signal to control switching of a power switch to control a transfer of energy from an input of the power converter to an output of the power converter. An input sense circuit is coupled to receive an input sense signal representative of the input of a power converter. A sense enable circuit is coupled to receive the drive signal to generate a sense enable signal to control the input sense circuit in response to the drive signal. The sense enable signal is coupled to control the input sense circuit to sense the input sense signal continuously in response to a first load condition, and sense the input sense signal only during a fraction of a switching period of the power switch in response to a second load condition.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 18, 2014
    Applicant: Power Integrations, Inc.
    Inventors: Zhao-Jun Wang, Giao Minh Pham, Roland Sylvere Saint-Pierre
  • Patent number: 8787050
    Abstract: A circuit connection control system of a fuel cell includes a point connection portion to which an anode current collecting portion and a cathode current collecting portion of each unit cell are electrically connected, a voltage measuring unit that measures an output voltage of each unit cell, a switching unit connecting the anode current collecting portions and the cathode current collecting portions of the plurality of unit cells at the point connection portion; and a DC-DC converter that converts a voltage generated from the fuel cell to a predetermined voltage. A method of operating the circuit connection control system includes measuring an output voltage of each unit cell; detecting a first unit cell showing an output voltage lower than a predetermined first voltage; and connecting the first unit cell in parallel to a second unit cell.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: July 22, 2014
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Young-Jae Kim, Dong-kee Sohn, Hye-jung Cho, Joon-hee Kim, Jae-yong Lee, Jin-ho Kim
  • Patent number: 8773094
    Abstract: An alternating current (AC) line emulator includes an AC power supply and an automatic regulating load. The AC power supply is used for providing an AC line frequency and an AC line voltage. The automatic regulating load is coupled between the AC power supply and a grid-connected power generation system for functioning as a test load of the grid-connected power generation system, and preventing current from reversing to the AC power supply and shutting down the AC power supply. When the grid-connected power system is tested, power consumption of the automatic regulating load is equal to a sum of output power of the grid-connected power generation system and output power of the AC power supply.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: July 8, 2014
    Assignee: Motech Industries Inc.
    Inventors: Yung-Hsiang Liu, Kuo-Hsin Chu, Hsu-Chin Wu, Hwai-Ching Shi, Wei-Kang Liang
  • Patent number: 8769329
    Abstract: A peripheral power management system includes a power monitor for determining a power consumption characteristic of a computing processor and a controller for generating a reference power signal based on the power consumption characteristic. The peripheral power management system also includes a power regulator control signal generator for generating a power regulator control signal based on the reference power signal. The power regulator control signal controls a peripheral device power regulator which regulates an electrical supply power of a peripheral device. In this way, the peripheral power management system controls regulation of the electrical supply power of the peripheral device based on the power consumption characteristic of the computing processor. In some embodiments, the peripheral power management system determines the power consumption characteristic of the computing processor by monitoring communication on a serial voltage identification bus.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: July 1, 2014
    Assignee: Integrated Device Technology, Inc.
    Inventors: Cheng Wen Hsiao, Eric Leung
  • Publication number: 20140153287
    Abstract: A power conversion system includes at least one switching unit. The switching unit includes a switching device including a channel and a body diode integrated with the channel. The switching device includes a first terminal, a second terminal, and a third terminal. The channel provides a positive direction current flow path to allow a positive direction current to flow through in response to a first turn-on switching control signal supplied to the first terminal. The body diode provides a first negative direction current flow path to allow a negative direction current to flow through in response to a first turn-off switching control signal. The channel provides a second negative direction current flow path to allow the negative direction current to flow through in response to a second turn-on switching control signal.
    Type: Application
    Filed: November 25, 2013
    Publication date: June 5, 2014
    Applicant: General Electric Company
    Inventor: Saijun Mao
  • Publication number: 20140111113
    Abstract: A current sense and feedback circuit is provided for a non-isolated Buck power converter to maintain constant current load regulation. The Buck converter may have a high side power switch and may include an input port, a switcher unit including a switch and a controller, an inductor coupled to the output, and a freewheeling diode for circulating the inductor current when the switch is open. The simplified current sense and feedback circuit of the power converter may include a current sense resistor module coupled to the freewheeling diode to provide a sense signal to the controller. The controller may also be coupled to the output of the power converter to sense an over voltage condition. The simplified current sense and feedback circuit may provide output regulation while maintaining a low component count, small size, and low loss that makes the power converter suitable for use in compact design applications.
    Type: Application
    Filed: October 18, 2012
    Publication date: April 24, 2014
    Applicant: Power Integrations, Inc.
    Inventor: Jose R. DEL CARMEN, JR.