Transistor Patents (Class 363/127)
  • Patent number: 11894771
    Abstract: There is provided a current control circuit (20) for connection between a first electrical network (42) and a converter, the current control circuit (20) comprising: first and second input terminals (24,26) for connection to the first electrical network (42); first and second output terminals (28,30) for respective connection to converter terminals (46,48) of the converter; first and second switching limbs, the first switching limb interconnecting the first input and output terminals (24,28), the second switching limb interconnecting the second input and output terminals (26,30), each switching limb including a respective switching element (32,34,36,38); a director limb (76) extending between the first and second output terminals (28,30), the director limb (76) including at least one current director element (84) and at least one first resistive element (86), the director limb (76) including an intermediate terminal (82); a second resistive element (88), a first end of the second resistive element (88) ope
    Type: Grant
    Filed: January 28, 2020
    Date of Patent: February 6, 2024
    Assignee: General Electric Technology GmbH
    Inventors: Hassan Taghizadeh, Carl David Barker, Robert Stephen Whitehouse
  • Patent number: 11881787
    Abstract: A power converter with secondary side active clamp. At least one example is a method including: limiting a push-phase voltage excursion of a phase node on a secondary side of a power converter during a push phase of a primary side of the power converter, the limiting by extracting current from the phase node and storing the current on a clamp capacitor; limiting a pull-phase voltage excursion of the phase node on the secondary side of the power converter during a pull phase of the primary side of the power converter, the limiting by extracting current from the phase node and storing the current on a clamp capacitor; and utilizing the current stored on the clamp capacitor to drive a component on the secondary side.
    Type: Grant
    Filed: April 28, 2022
    Date of Patent: January 23, 2024
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Alessandro Zafarana
  • Patent number: 11879919
    Abstract: A method can include in a first phase of a sensing operation, controlling at least a first switch to energize a sensor inductance; in a second phase of the sensing operation that follows the first phase, controlling at least a second switch to couple the sensor inductance to a first modulator capacitance to induce a first fly-back current from the sensor inductance, the first fly-back current generating a first modulator voltage at the first modulator capacitance, and in response to the first modulator voltage, controlling at least a third switch to generate a balance current that flows in an opposite direction to the fly-back current at the first modulator node. The first and second phases can be repeated to generate a first modulator voltage at the first modulator capacitance. the modulator voltage can be converted into a digital value representing the sensor inductance. Related devices and systems are also disclosed.
    Type: Grant
    Filed: January 19, 2023
    Date of Patent: January 23, 2024
    Assignee: Cypress Semiconductor Corporation
    Inventors: Andriy Maharyta, Mykhaylo Krekhovetskyy
  • Patent number: 11870362
    Abstract: Synchronous rectification control circuit and switching power supply system are provided. The circuit includes a sampling circuit, a turn-on comparison circuit, a turn-off comparison circuit, a drive control circuit, an anti-accidental turn-on circuit, wherein the sampling circuit has a first terminal coupled to a first output terminal of a transformer; the anti-accidental turn-on circuit has a first input terminal coupled to a second terminal of the sampling circuit; the turn-on comparison circuit has a first input terminal coupled to the second terminal of the sampling circuit, a second input terminal coupled to an output terminal of the anti-accidental turn-on circuit; the turn-off comparison circuit has an input terminal coupled to the second terminal of the sampling circuit; the drive control circuit has a first input terminal coupled to an output terminal of the turn-on comparison circuit, a second input terminal coupled to an output terminal of the turn-off comparison circuit.
    Type: Grant
    Filed: December 23, 2021
    Date of Patent: January 9, 2024
    Assignee: Wuxi Chipown Microelectronics Co., Ltd.
    Inventors: Jian Yin, Yang Luo, Haisong Li
  • Patent number: 11851038
    Abstract: An emergency energy store for a vehicle. Multiple electrical energy storage devices may feed electrical power in parallel into an electrical power supply network of a vehicle with the aid of separate voltage converters in each case. An electromechanical brake booster for a vehicle, a braking and/or steering system for a vehicle, and a power supply system for a vehicle, are also provided. A manufacturing method for an emergency energy store of a vehicle is also provided.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: December 26, 2023
    Assignee: ROBERT BOSCH GMBH
    Inventors: Jitendra Solanki, Michael Donotek
  • Patent number: 11799384
    Abstract: A power converter with co-packaged secondary field effect transistors (FETs) are described. The power converter can include a first circuit, a transformer connected to an output of the first circuit, and a second circuit connected to an output of the transformer. The second circuit can include an inductor, a first FET coupled between the transformer and the inductor, and a second FET coupled between the first FET and ground. The first FET and the second FET can be co-packaged as a single package.
    Type: Grant
    Filed: January 28, 2020
    Date of Patent: October 24, 2023
    Assignee: International Business Machines Corporation
    Inventors: Todd Edward Takken, Xin Zhang, Andrew Ferencz
  • Patent number: 11784575
    Abstract: A synchronous rectification control circuit and method, and a flyback switched-mode power supply (SMPS) are provided. A voltage adjustment circuit is used to adjust a value of a first voltage signal that represents an output voltage, such that a voltage-second product of a difference between the output voltage and a drain-source voltage of a secondary-side synchronous rectifier can be zeroed in time in a transient process, and no false accumulation occurs. In this way, when a primary-side transistor switch is turned on, the secondary-side synchronous rectifier is turned off, to avoid a case in which the primary-side transistor switch and the secondary-side synchronous rectifier are simultaneously turned on.
    Type: Grant
    Filed: August 23, 2021
    Date of Patent: October 10, 2023
    Assignee: JOULWATT TECHNOLOGY CO., LTD.
    Inventors: Zhiyong Su, Mengyi Huang
  • Patent number: 11764647
    Abstract: An electrical power system includes an electrical machine having one or more windings and an AC-DC power electronics converter including a commutation cell having a power circuit and a gate driver circuit. The power circuit includes a plurality of power semiconductor switching elements and a capacitor. The gate driver circuit is electrically connected to and configured to provide switching signals to a gate terminal of each power semiconductor switching element. A peak rated power output of the electrical machine and the AC-DC power electronics converter is greater than 25 kW, a maximum efficiency of the AC-DC power electronics converter is greater than 97%, and a value of parameter ? is greater than or equal to 0.3 PV/s2, where ? is a product of a maximum switching frequency of the switching signals and a maximum rate of change of a source-drain voltage of the plurality of power semiconductor switching elements.
    Type: Grant
    Filed: August 31, 2022
    Date of Patent: September 19, 2023
    Assignee: Rolls-Royce Deutschland Ltd & Co KG
    Inventors: Uwe Waltrich, Stanley Buchert, Marco Bohlländer, Claus Müller
  • Patent number: 11750106
    Abstract: An apparatus includes a rectifier coupled to a coil of a wireless power transfer system, the rectifier comprising a first leg and a second leg, wherein the first leg comprises a first switch and a second switch connected in series between a first voltage bus and a second voltage bus, and the second leg comprise a third switch and a fourth switch connected in series between the first voltage bus and the second voltage bus, and wherein a gate drive signal of the first switch is derived from a signal in phase with a voltage on a first terminal of the coil, and a gate drive signal of the third switch is derived from a signal in phase with a voltage on a second terminal of the coil.
    Type: Grant
    Filed: July 26, 2021
    Date of Patent: September 5, 2023
    Assignee: NuVolta Technologies (Hefei) Co., Ltd.
    Inventors: Junxiao Chen, Gang Dai, Jinbiao Huang
  • Patent number: 11750088
    Abstract: The application provides a method for controlling a PFC circuit including a diode bridge arm, DNPC bridge arm and capacitor group connected in parallel. The control method includes: switching working mode of the PFC circuit back and forth between first mode and third mode via second mode in each switching cycle when positive half cycle of a modulation wave is modulated, and switching working mode of the PFC circuit back and forth between sixth mode and fourth mode via fifth mode in each switching cycle when negative half cycle of the modulation wave is modulated. The durations of the second and fifth modes are as short as possible, thereby decreasing a current flowing into or out from midpoint of the capacitor group, and reducing voltage fluctuation at the midpoint. The application further provides a PFC circuit using the control method and a power conversion device having the PFC circuit.
    Type: Grant
    Filed: March 23, 2022
    Date of Patent: September 5, 2023
    Assignee: Delta Electronics (Shanghai) Co., Ltd.
    Inventors: Cheng Lu, Hongyang Wu, Wenfei Hu
  • Patent number: 11736020
    Abstract: A more efficient power supply system comprises a rectifier, a low voltage inverter, and a low voltage actuator, the rectifier converting a mains AC voltage into a low input DC voltage, the low voltage inverter connected to the rectifier and converting the low input DC voltage into a low supply AC voltage, and the low voltage inverter connected to the low voltage actuator to supply the low voltage actuator with power via the low supply AC voltage. A DC-DC converter connected to the rectifier converts the low input DC voltage into an extra-low DC voltage. An extra-low voltage inverter connected to the DC-DC converter converts the extra-low DC voltage into an extra-low supply AC voltage. The extra-low voltage inverter connected to an extra-low voltage actuator supplies the extra-low voltage actuator with power via the extra-low supply AC voltage.
    Type: Grant
    Filed: July 1, 2021
    Date of Patent: August 22, 2023
    Assignee: B&R INDUSTRIAL AUTOMATION GMBH
    Inventors: Sebastian Blume, Stefan Nesic, Djordje Vukovic
  • Patent number: 11695283
    Abstract: Aspects of the disclosure provide for a circuit. In at least some examples, the circuit includes a logic circuit, a first comparator, a second comparator, and an AND logic circuit. The logic circuit has an output and the first comparator has a first input coupled to an input voltage (VIN) pin, a second input configured to receive a Vin under voltage lockout (VINUVLO) threshold value, and an output. The second comparator has a first input coupled to a power middle (PMID) pin, a second input coupled to a battery pin, and an output and the AND logic circuit has a first input coupled to the output of the logic circuit, a second input coupled to the output of the first comparator, a third input coupled to the output of the second comparator, and an output coupled to an input of a field-effect transistor (FET) control circuit.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: July 4, 2023
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Mustapha El Markhi, Alejandro Vera, Tonmoy Roy, Rohit Bhan
  • Patent number: 11677335
    Abstract: A method of operating a thyristor-based line-commutated multi-phase power converter on a multi-phase AC voltage connection point, which is supplied by an AC voltage network. Between the AC voltage connection point and an AC voltage connection of the power converter, a series circuit of modules is arranged for each phase. Each of the series circuits has a first electronic switching element, a second electronic switching element, and an electric energy storage device. The voltages of the phases of the AC voltage connection point are measured and, if an undervoltage is detected on a phase of the AC voltage connection point, an additional voltage adding to the voltage of that phase is generated by way of the series circuit of modules allocated to that phase in such a way that the voltage of that phase is increased, at least temporarily.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: June 13, 2023
    Assignee: Siemens Energy Global GmbH & Co. KG
    Inventors: Stefan Hammer, Volker Hussennether
  • Patent number: 11626809
    Abstract: Systems and methods for power conversion are described. For example, a system may include a transformer including a plurality of secondary windings; a first set of switches connecting respective taps of the plurality of secondary windings to a first terminal; a second set of switches connecting the respective taps of the plurality of secondary windings to a second terminal; and an electrical load connected between the first terminal and the second terminal.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: April 11, 2023
    Assignee: APPLE INC.
    Inventors: Ashish K. Sahoo, Brandon Pierquet, Jie Lu
  • Patent number: 11601020
    Abstract: Disclosed in the present application is an incompletely compensated wireless power transfer system. On the basis of an SS compensated wireless power transfer system topology, a primary side capacitor C1 and a secondary side capacitor C2 take specific values, and in combination with a phase shift frequency modulation control method, a coupling range of a system output rated power is improved. According to the present application, by finding an appropriate combination of the primary side capacitor C1 and the secondary side capacitor C2, the system can output a required rated power in a larger coupling range under the condition of incomplete compensation.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: March 7, 2023
    Assignee: Zhejiang University
    Inventors: Wenxing Zhong, Dehong Xu
  • Patent number: 11594977
    Abstract: A synchronous rectifier includes: an integrator configured to integrate a voltage across a secondary side winding of a transformer over an integral period having an expected zero integral value; a first comparator configured to detect an end of a demagnetization phase of the secondary side winding based on diode detection; and a digital circuit configured to adjust a channel gain of the synchronous rectifier based on an integration error at the end of the integral period, the integration error corresponding to the difference between the integrated voltage at the end of the integral period and the expected zero integral. Corresponding methods of gain tuning and a power converter are also described.
    Type: Grant
    Filed: October 27, 2020
    Date of Patent: February 28, 2023
    Assignee: Infineon Technologies Austria AG
    Inventors: Andrey Malinin, Renato Bessegato, Yong Siang Teo
  • Patent number: 11565608
    Abstract: A system and method are arranged to control a low voltage DC converter of a fuel cell vehicle, in which, although a CAN communication timeout where the low voltage DC converter does not receive an off command from a vehicle control unit or a CAN communication failure occurs, when an output current of the low voltage DC converter is lowered by at least a predetermined value, the low voltage DC converter is turned off by itself by determining that a post-treatment operation of a fuel cell system is completed, and after the low voltage DC converter is turned off, a relay of a high voltage battery is opened, thereby preventing the relay of the high voltage battery from fusing.
    Type: Grant
    Filed: August 24, 2021
    Date of Patent: January 31, 2023
    Assignees: Hyundai Motor Company, Kia Corporation
    Inventors: Sang Kyu Lee, Tae Woo Kim, Se La Lim, Won Seok Jin
  • Patent number: 11557981
    Abstract: An ideal diode circuit is described which uses an NMOS transistor as a low-loss ideal diode. The control circuit for the transistor is referenced to the anode voltage and not to ground, so the control circuitry may be low voltage circuitry, even if the input voltage is very high, referenced to earth ground. A capacitor is clamped to about 10-20 V, referenced to the anode voltage. The clamped voltage powers a differential amplifier for the detecting if the anode voltage is greater than the cathode voltage. The capacitor is charged to the clamped voltage during normal operation of the ideal diode by controlling the conductivity of a second transistor coupled between the cathode and the capacitor, enabling the circuit to be used with a wide range of frequencies and voltages. All voltages applied to the differential amplifier are equal to or less than the clamped voltage.
    Type: Grant
    Filed: November 2, 2020
    Date of Patent: January 17, 2023
    Assignee: Analog Devices International Unlimited Company
    Inventors: Jeffrey Lynn Heath, Trevor W. Barcelo
  • Patent number: 11539292
    Abstract: A subtracting unit calculates a voltage deviation of an output voltage of a DC-to-DC converter from a target voltage. A feedback control variable calculator calculates a feedback control variable in each control cycle. In a control cycle in which a crossing of the output voltage and the target voltage is detected by a feedforward control determination unit, a feedforward control variable calculator calculates a feedforward control variable so that a change in the output voltage is prevented. A switching control signal generator generates a control signal for the DC-to-DC converter for controlling the output voltage, according to a summation of the feedforward control variable and the feedback control variable.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: December 27, 2022
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shuichi Nagato, Miwako Tanaka, Akihiko Iwata
  • Patent number: 11539300
    Abstract: A DC to DC power converter device includes a controller, and a DC to DC resonant converter that includes first and second full bridge chopper circuits (FBCCs) and an LLC resonant converter coupled between the first and second FBCCs. To cause the DC to DC resonant converter to operate in a conversion mode where an input voltage received by the second FBCC is converted to an output voltage provided by the first FBCC, the controller controls switches of the second FBCC and switches of the first FBCC to transition between an ON state and an OFF state with the ON state reoccurring at a frequency lower than a resonant frequency of the DC to DC resonant converter, so that the output voltage can be higher than the input voltage.
    Type: Grant
    Filed: November 12, 2021
    Date of Patent: December 27, 2022
    Assignee: VOLTRONIC POWER TECHNOLOGY CORPORATION
    Inventors: Jian-Qun Wu, Stone Peng, Juor-Ming Hsieh
  • Patent number: 11525847
    Abstract: Systems and methods include an electrical switch that establishes a first electrical conducting path between terminals of an electrical measurement apparatus through one or more electrical leads and an electrically-conductive sample in a first state, and a second electrical conducting path between the terminals through the one or more electrical leads while bypassing the sample in a second state. A voltage VS+L is measured across all of the sample and the one or more electrical leads in the first state, while a voltage VL is measured across the one or more electrical leads while bypassing the sample in the second state. Calculations according to the equation VS=VS+L?VL are performed to determine a precision DC voltage measurement of a voltage across the sample VS in the absence of Seebeck voltage offsets contributed by the one or more electrical leads.
    Type: Grant
    Filed: September 24, 2021
    Date of Patent: December 13, 2022
    Assignee: NORTHWESTERN UNIVERSITY
    Inventors: Matthew Grayson, Chulin Wang, Juncen Li, William H. Reinhardt
  • Patent number: 11515800
    Abstract: A power apparatus applied in an SST structure includes a first AC-to-DC conversion unit, a first DC bus, an isolated transformer, a DC-to-AC conversion unit, a second AC-to-DC conversion unit, and a second DC bus. The first AC-to-DC conversion unit has a first bridge arm and a second bridge arm. The first DC bus provides a first DC voltage. The isolated transformer has a primary side and a secondary side. The DC-to-AC conversion unit has a third bridge arm and a fourth bridge arm. The second AC-to-DC conversion unit has a fifth bridge arm and a sixth bridge arm. The second DC bus provides a second DC voltage.
    Type: Grant
    Filed: February 5, 2021
    Date of Patent: November 29, 2022
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Wen-Lung Huang, Sheng-Hua Li
  • Patent number: 11496053
    Abstract: A power conversion system comprises a plurality of power modules, each including a power input end; a charging input end; a power output end; at least one power conversion unit, each including an AC/DC conversion unit and at least one DC-Bus capacitor and being connected to the power input end and the power output end; and a pre-charging unit connected to the charging input end for receiving direct current and connected to the DC-Bus capacitor. The pre-charging unit starts to charge the DC-Bus capacitor of one of the power modules when said power module breaks down or the load of the power conversion system is light so that no current flows through the AC/DC conversion unit. The power input ends of the power modules are connected in series and then connected to an AC power source, and the power output ends of the power modules are connected in parallel.
    Type: Grant
    Filed: January 6, 2021
    Date of Patent: November 8, 2022
    Assignee: DELTA ELECTRONICS, INC.
    Inventor: Weiqiang Zhang
  • Patent number: 11482931
    Abstract: Circuits and methods for protecting the switches of charge pump-based power converters from damage if a VOUT short circuit event occurs and/or if VIN falls rapidly with respect to VX or VOUT. A general embodiment includes a VX Detection Block coupled to the core block of a power converter. The VX Detection Block is coupled to VX and to a control circuit that disables operations of an associated converter circuit upon detection of large, rapid falls in VX during the dead time between clock phase signals, thereby prevent damaging current spikes. Some embodiments include a VIN Detection Block configured to detect and prevent excessive in-rush current due to rapidly falling values of VIN to the power converter. The VIN Detection Block is coupled to VIN, and to VX or VOUT in some embodiments, and to a control circuit to that disables operation of an associated converter circuit.
    Type: Grant
    Filed: February 6, 2020
    Date of Patent: October 25, 2022
    Assignee: pSemi Corporation
    Inventor: Antony Christopher Routledge
  • Patent number: 11476762
    Abstract: A power converter including switch components having different safe operating areas is provided. A first terminal of a first high-side switch is coupled to a common voltage. A first terminal of a first low-side switch is connected to a second terminal of the first high-side switch. A second terminal of the first low-side switch is grounded. A first terminal of a second low-side switch is connected to a node between the second terminal of the first high-side switch and the first terminal of the first low-side switch. A second terminal of the second low-side switch is grounded. A safe operating area of the second low-side switch is larger than a safe operating area of the first low-side switch. After the first low-side switch is turned off, the second low-side switch is turned off Before the first low-side switch is turned on, the second low-side switch is turned on.
    Type: Grant
    Filed: May 18, 2021
    Date of Patent: October 18, 2022
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Cheng-Han Wu, Fu-Chuan Chen
  • Patent number: 11418121
    Abstract: An auxiliary converter coupled to an output of a main power converter comprising an auxiliary switch, a timing circuit, and an energy transfer element. The auxiliary switch coupled to the output of the main power converter. A timing circuit coupled to receive a control signal from a controller of the main power converter, wherein the controller regulates the output of the main power converter, the timing circuit configured to output an auxiliary drive signal to control switching of the auxiliary switch in response to the control signal. The energy transfer element coupled to the auxiliary switch, wherein the energy transfer element is configured to transfer energy from the output of the main power converter to a supply of the controller, the supply provides operational power for the controller of the main power converter.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: August 16, 2022
    Assignee: Power Integrations, Inc
    Inventors: Arthur B. Odell, Munadir Aziz Ahmed
  • Patent number: 11411504
    Abstract: A voltage transforming device is provided. The voltage transforming device boosts an input voltage to generate a boosted voltage in response to a voltage demand from an external device. The voltage transforming device converts the boosted voltage to provide a converted voltage based on a fixed gain condition. In addition, the voltage transforming device converts the converted voltage to provide an output voltage in response to the voltage demand.
    Type: Grant
    Filed: July 7, 2021
    Date of Patent: August 9, 2022
    Assignee: Chicony Power Technology Co., Ltd.
    Inventors: Tso-Jen Peng, Ssu Hao Wang
  • Patent number: 11411492
    Abstract: A charge pump for a Radio Frequency Identification (RFID) tag is disclosed. The charge pump includes an antenna port to receive an input AC signal, an input port to receive an input signal, and a main transistor having a gate, a source and a drain. A threshold voltage cancellation circuit is included and is coupled between one terminal of the antenna port and the input port, wherein an output of the threshold voltage cancellation circuit is configured to drive the gate of the main transistor. The threshold voltage cancellation circuit is configured to reduce the threshold voltage of the main transistor when the voltage of the input signal is below a predefined voltage level and to remove threshold voltage cancellation when the voltage of the input signal is above the predefined voltage levels.
    Type: Grant
    Filed: May 29, 2021
    Date of Patent: August 9, 2022
    Assignee: NXP B.V.
    Inventors: Thomas Pichler, Ivan Jesus Rebollo Pimentel
  • Patent number: 11411489
    Abstract: A resonant half-bridge flyback power converter includes: a power transformer and a resonant capacitor which are coupled in series between a half-bridge power stage and an output power; and a primary controller circuit controlling a high side power switch and a low side power switch of the half-bridge power stage. When the high side switch is OFF, the control signal of the low side power switch includes a resonant switching pulse for achieving resonant switching of the low side switch and a soft switching pulse for achieving ZVS of the high side switch. When the output power is lower than a delay threshold, the primary controller circuit determines a delay period which is between the resonant switching pulse and the soft switching pulse to control both the high side power switch and the low side power switch to be OFF. The delay period is negatively correlated with the output power.
    Type: Grant
    Filed: June 7, 2021
    Date of Patent: August 9, 2022
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Ta-Yung Yang, Kun-Yu Lin, Yu-Chang Chen
  • Patent number: 11349401
    Abstract: A power converter with secondary side active clamp. At least one example is a method including: limiting a push-phase voltage excursion of a phase node on a secondary side of a power converter during a push phase of a primary side of the power converter, the limiting by extracting current from the phase node and storing the current on a clamp capacitor; limiting a pull-phase voltage excursion of the phase node on the secondary side of the power converter during a pull phase of the primary side of the power converter, the limiting by extracting current from the phase node and storing the current on a clamp capacitor; and utilizing the current stored on the clamp capacitor to drive a component on the secondary side.
    Type: Grant
    Filed: March 2, 2021
    Date of Patent: May 31, 2022
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Alessandro Zafarana
  • Patent number: 11336200
    Abstract: A controller (5) of an uninterruptible power supply apparatus includes: first to sixth comparator circuits (22a to 22f) respectively provided corresponding to first to sixth IGBTs (Q1 to Q6) and outputting, based on a comparison result of the magnitude of three-phase AC voltages, signals (A1 to A6) indicating that a corresponding IGBT is to be turned on; and a control unit (23) that, when a voltage between terminals (VD1 or VD2) of a first or second capacitor (C11 or C12) is higher than a target voltage (VDT), turns on and off each of the first to sixth IGBTs based on signals output from the first to sixth comparator circuits to decrease the voltage between terminals of the first or second capacitor.
    Type: Grant
    Filed: April 6, 2018
    Date of Patent: May 17, 2022
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Hiroki Shigeta, Toshihide Nakano
  • Patent number: 11316435
    Abstract: There is provided an insulated DC/DC converter configured to generate a secondary voltage on a secondary side of a power transformer from a primary voltage on a primary side of the power transformer by switching a switching element connected to a primary winding of the power transformer while insulating the primary side and the secondary side of the power transformer from each other, including: a communication transformer; a secondary control circuit including a PWM controller configured to generate a PWM signal of a constant PWM frequency based on the secondary voltage in a circuit arranged on the secondary side; and a primary control circuit configured to switch the switching element at the PWM frequency based on information of the PWM signal transmitted from the secondary control circuit via the communication transformer in a circuit arranged on the primary side.
    Type: Grant
    Filed: June 9, 2020
    Date of Patent: April 26, 2022
    Assignee: Rohm Co., Ltd.
    Inventor: Hideo Hara
  • Patent number: 11296605
    Abstract: A synchronous rectifier controller controls a rectification power switch connected in series with a secondary winding between two power lines. The synchronous rectifier has a gate driver and a slew-rate detector. The gate driver drives the rectification power switch. The slew-rate detector detects a channel voltage of the rectification power switch, checks if a slew rate of the channel voltage exceeds a slope threshold. If the slew rate exceeds the slope threshold, the slew-rate detector turns the rectification power switch ON through the gate driver. If the slew rate is less than the slope threshold, the slew-rate detector reduces the slope threshold.
    Type: Grant
    Filed: May 13, 2020
    Date of Patent: April 5, 2022
    Inventors: Chih-Chiao Tsai, Jui-Chang Chuang
  • Patent number: 11277073
    Abstract: Electronic circuitry and method of operating the same to shape and reduce the circulating current through the active clamp in a flyback converter and to harvest most of the leakage inductance energy to provide the bias power. Methodologies for minimizing the circulating energy in the clamp circuit in order to improve efficiency of operation of the same. A method for using a portion of the leakage inductance energy in order to create zero voltage switching conditions at the main primary switch.
    Type: Grant
    Filed: May 4, 2020
    Date of Patent: March 15, 2022
    Assignee: Rompower Technology Holdings, LLC
    Inventor: Ionel Jitaru
  • Patent number: 11251715
    Abstract: A synchronous rectification control circuit includes a first drive unit that outputs a signal for controlling turning on/off of a synchronous rectification element disposed on a secondary side, a second drive unit that performs control to make a voltage between both ends of the synchronous rectification element equal to a predetermined threshold voltage during a predetermined period during which a rectification current flows on the secondary side, and a drive switching unit that selectively supplies an output from the first drive unit and an output from the second drive unit to the synchronous rectification element.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: February 15, 2022
    Assignee: SONY CORPORATION
    Inventor: Yoshiki Oyama
  • Patent number: 11251722
    Abstract: A converter scheme (30) comprises a plurality of poles and a plurality of converters (32), the plurality of poles (60,62,64) including at least one positive pole (60), at least one negative pole (62) and a neutral pole (64), the plurality of converters (32) including at least one first converter (32a) and at least one second converter (32b), the or each first converter (32a) connected to the neutral pole (64) and the or the respective positive pole (60), the or each first converter (32a) operable to control a converter voltage across the neutral pole (64) and the corresponding positive pole (60), the or each second converter (32b) connected to the neutral pole (64) and the or the respective negative pole (62), the or each second converter (32b) operable to control a converter voltage across the neutral pole (64) and the corresponding negative pole (62), wherein the converter scheme (30) includes a controller (36) programmed to perform a voltage control mode when there is an imbalance between power or current
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: February 15, 2022
    Assignee: General Electric Technology GmbH
    Inventors: Radnya Anant Mukhedkar, Gearoid Sean O'Heidhin, Amit Kumar
  • Patent number: 11223297
    Abstract: A modular multipoint power converter for converting an AC voltage to a DC voltage or vice versa, and a method of operating it are provided. The multipoint power converter has a converter branches, whereby two converter branches are connected to each other respectively to form a phase branch of the converter. Each converter branch has a plurality of similar submodules, each of which is formed from a half-bridge circuit with power semiconductor switches. The branch currents through the converter branches are controlled in operation by increasing the DC component of the DC current or the DC intermediate circular current such that a unipolar current flows through the converter branches. As a result, with the same plurality of submodules per converter branch, the transmissible power can be increased, the power semi-conductor elements can be better utilized, or the plurality of submodules can be reduced while the transmissible power remains the same.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: January 11, 2022
    Assignee: GE ENERGY POWER CONVERSION TECHNOLOGY LTD
    Inventors: Martin Geske, Duro Basic
  • Patent number: 11195655
    Abstract: Techniques are provided for segmented windings of a coupled inductor within a DC-DC voltage converter or regulator. In an example, a coupled inductor circuit can include a first winding comprising a conductive coil having a central axis, and a second winding configured to magnetically couple with the first winding. The second winding can have a plurality of individual segments. Each individual segment can form a fraction of one turn of the second winding. Each segment can include a first conductor, a ground conductor, and a first switch to selectively couple, and selectively isolate, the first conductor and the ground conductor.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: December 7, 2021
    Assignee: Analog Devices International Unlimited Company
    Inventor: Jonathan Paolucci
  • Patent number: 11152165
    Abstract: A connection structure of a plurality of switching modules that reduces required insulation voltage significantly when the plurality of switching modules is connected to each other in series is proposed. A switching module connection structure includes: n (n?1, integer) switching modules arranged in two or more columns and all connecting to each other in series from a first switching module in a first column to a last switching module in a last column; and insulating members disposed between at least some switching modules for each column.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: October 19, 2021
    Assignee: HYOSUNG HEAVY INDUSTRIES CORPORATION
    Inventors: Byoung Choul Kim, Young Hwan Chung
  • Patent number: 11088627
    Abstract: A switching power supply circuit with synchronous rectifier has an energy storage component, a rectifier switch coupled to a secondary side of the energy storage component, and a secondary side control circuit. The secondary side control circuit provides a driving signal to control the rectifier switch. When the drain-source voltage across the rectifier switch is less than a first threshold value, the secondary side control circuit controls the driving signal to be a maximum voltage to control the rectifier switch being fully on for a predetermined duration. After a predetermined duration, the secondary side control circuit adjusts the voltage of the driving signal based on the drain-source voltage across the rectifier switch and a second threshold value.
    Type: Grant
    Filed: January 14, 2020
    Date of Patent: August 10, 2021
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Siran Wang
  • Patent number: 11063527
    Abstract: An electrical converter (203) having an active diode-clamped multilevel topology is shown. Each clamping diode is connected in antiparallel with a switch (S5A, S5B). The converter comprises polyphase supply phases (A, B, C) each of which are connected via a respective phase leg (401, 402, 403) to dc rails (301, 302) and a dc-link capacitor. The dc-link capacitor includes a plurality of series-connected capacitors (404, 405). A controller is configured to, in response to an event signal, for each phase leg, activate a combination of switches therein to form a pair of parallel conduction paths to a midpoint (406) between two capacitors in the dc-link capacitor, thereby connecting each phase to the same node.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: July 13, 2021
    Assignee: ROLLS-ROYCE plc
    Inventors: David R. Trainer, Ellis F H Chong, Zhigang Sun
  • Patent number: 11050356
    Abstract: A rectifying circuit (10, 10.1, 10.2, 10.3, 10.4, 10.5, 10.6) comprising a first circuit branch (20) and a second circuit branch (30) in parallel between an output node (Out) and a reference node (GND), each circuit branch (20, 30) comprising an inductive element (L1, L2) in series with an electric current controlling element (23, 33) and an input node (In1, In2) arranged between the inductive element (L1, L2) and the electric current controlling element (23, 33), a voltage that is variable over time being applied between the input nodes (In1, In2) during the operation of the rectifying circuit.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: June 29, 2021
    Assignee: EGGTRONIC ENGINEERING S.R.L.
    Inventors: Igor Spinella, Enrico Dente, Giovanni Mascia
  • Patent number: 11043705
    Abstract: A modified battery cell for simulating failure conditions includes a multiple layer electrical cell. A transistor having a source, a gate, and a drain is positioned in the cell. A controllable voltage source is provided, joined to the gate and source of the transistor. The transistor source is further joined to a first location within said electrical cell multiple layers, and the transistor drain is electrically joined to a second location within said electrical cell multiple layers. Voltage from the controllable voltage source can reduce resistance between said transistor source and said transistor drain for simulating a fault condition between the first location and the second location.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: June 22, 2021
    Inventors: Charles J Patrissi, Joseph H Fontaine, Jian Tan
  • Patent number: 11043901
    Abstract: A full bridge converter having a wide output voltage range includes an input power source, a full bridge switching circuit, a transformer, a first rectifying circuit, a second rectifying circuit, a first output circuit, a second output circuit, and a control circuit. The transformer includes a magnetic core, a primary side winding, a first secondary side winding, and a second secondary side winding. The first rectifying circuit includes a first AC switch, a second AC switch and a first freewheeling diode, and the second rectifying circuit includes a third AC switch, a fourth AC switch and a second freewheeling diode. The control circuit, according to a duty cycle, controls the first AC switch and the third AC switch to be turned on during a positive half cycle, and controls the second AC switch and the fourth AC switch to be turned on during a negative half cycle.
    Type: Grant
    Filed: March 4, 2020
    Date of Patent: June 22, 2021
    Assignee: NATIONAL TAIWAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Jing-Yuan Lin, Shih-Min Lin, Hsuan-Yu Yueh
  • Patent number: 11031877
    Abstract: A synchronous rectifier monitors a driven signal of a synchronous switch. If the driven signal is provided within a set time length, the driven signal is latched off, to make the system enter light load mode.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: June 8, 2021
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Lei Miao
  • Patent number: 11018255
    Abstract: A device includes a string driver comprising a channel region between a drain region and a source region. At least one of the channel region, the drain region, and the source region comprises a high band gap material. A gate region is adjacent and spaced from the high band gap material. The string driver is configured for high-voltage operation in association with an array of charge storage devices (e.g., 2D NAND or 3D NAND). Additional devices and systems (e.g., non-volatile memory systems) including the string drivers are disclosed, as are methods of forming the string drivers.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: May 25, 2021
    Assignee: Micron Technology, Inc.
    Inventors: Haitao Liu, Guangyu Huang, Chandra V. Mouli, Akira Goda, Deepak Chandra Pandey, Kamal M. Karda
  • Patent number: 10998830
    Abstract: A power conversion device includes: power conversion cells; and a controller to control the cells. Each cell includes: a transformer; a primary conversion unit on a primary side of the transformer; a secondary conversion unit on a secondary side; a primary bypass device for short-circuiting between input terminals of the cell; and a secondary bypass device for short-circuiting between output terminals of the cell. The input terminals and/or the output terminals of the cells are connected in series. When the primary conversion unit(s) of a part of the cells is stopped, the controller turns on the primary bypass device and sets secondary DC link voltages to prescribed values; and when the secondary conversion unit(s) of a part of the cells is stopped, the controller turns on the secondary bypass device and controls the primary conversions units to set primary DC link voltages to prescribed values.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: May 4, 2021
    Assignee: Hitachi, Ltd.
    Inventors: Mitsuhiro Kadota, Takae Shimada
  • Patent number: 10992175
    Abstract: A circuit for stealing power from an external system without interfering with a communication protocol includes a plurality of wiring connectors configured to receive a plurality of wires, where the plurality of wiring connectors receive a plurality of current levels set by the external system according to the communication protocol; a first voltage regulator to regulate a voltage on the plurality of wiring connectors at a plurality of voltage levels according to the communication protocol; a current monitor to measure the plurality of current levels received through the plurality of wiring connectors; a second voltage regulator that provides a current-limiting output; and a power converter that optimizes an amount of power stolen from the plurality of wiring connectors based on the current-limiting output.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: April 27, 2021
    Assignee: Google LLC
    Inventors: Daniel Adam Warren, Eric Marschalkowski, Nathan Lentz, Timothy Lai
  • Patent number: 10944338
    Abstract: A power apparatus applied in an SST structure includes a first AC-to-DC conversion unit, a first DC bus, an isolated transformer, a DC-to-AC conversion unit, a second AC-to-DC conversion unit, and a second DC bus. The first AC-to-DC conversion unit has a first three-level bridge arm and a second three-level bridge arm. The first DC bus provides a first DC voltage. The isolated transformer has a primary side and a secondary side. The DC-to-AC conversion unit has a third three-level bridge arm and a fourth three-level bridge arm. The second AC-to-DC conversion unit has a fifth three-level bridge arm and a sixth three-level bridge arm. The second DC bus provides a second DC voltage.
    Type: Grant
    Filed: September 5, 2019
    Date of Patent: March 9, 2021
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Wen-Lung Huang, Sheng-Hua Li
  • Patent number: 10938309
    Abstract: An example voltage converter includes a transformer having a primary winding, a first secondary winding, and a second secondary winding; a first transistor connected between a first terminal of the first secondary winding and electrical ground; a second transistor connected between a second terminal of the second secondary winding and electrical ground; an inductor connected to a center tap of the transformer between the first secondary winding and the second secondary winding; and a capacitor that is connectable along a current path to the transformer that includes the inductor via at least one of the first transistor or the second transistor. A control system generates, based on characteristics of current through the inductor, pulse-width modulated control signals to control operation of the first transistor and the second transistor to produce voltage at the primary winding based on a voltage across the capacitor.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: March 2, 2021
    Assignee: Raytheon Company
    Inventor: Steven Mark Malechek