Patents Examined by Jue Zhang
  • Patent number: 11996788
    Abstract: Disclosed is a novel and innovative class of buck-boost bidirectional inverters achieve ultra high efficiency in applications requiring converting of one or more low and variable DC voltages of one or more power sources (which may include a battery, a low-voltage DC source, or a set of PV solar panels) to an AC voltage (e.g., connected to a grid) through a single-stage power conversion with step modulation.
    Type: Grant
    Filed: September 15, 2021
    Date of Patent: May 28, 2024
    Assignee: Redx Technology Australia Pty Ltd
    Inventors: Xue Jian Chen, Jin Chuan Huang
  • Patent number: 11994889
    Abstract: Provided is an overcurrent protection circuit including an overcurrent detection unit configured to compare an output current flowing through a switch element and a predetermined overcurrent detection value to generate an overcurrent detection signal, an output activation detection unit configured to compare an output voltage and a predetermined threshold voltage to generate an output activation detection signal, a logic unit configured to combine the overcurrent detection signal and the output activation detection signal to generate a logic operation signal, and a diagnostic output unit configured to provide diagnostic output, the logic unit shifting the logic operation signal to a logic level of abnormal state when the overcurrent detection signal is shifted to a logic level of overcurrent detection state and holding the logic operation signal at that logic level, unless the output activation detection signal is shifted to a logic level of output activation state.
    Type: Grant
    Filed: March 22, 2022
    Date of Patent: May 28, 2024
    Assignee: ROMM Co., LTD.
    Inventors: Kenji Muraoka, Toru Takuma
  • Patent number: 11996784
    Abstract: A voltage converter delivers an output voltage between a first and a second node. The voltage converter includes a capacitor series-coupled with a resistor between the first and second nodes. The resistor is coupled in parallel with a bidirectional switch receiving at its control terminal a positive bias voltage referenced to the second node.
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: May 28, 2024
    Assignee: STMicroelectronics (Tours) SAS
    Inventors: Yannick Hague, Romain Launois
  • Patent number: 11996780
    Abstract: The present disclosure provides a power conversion circuit including positive and negative input terminals, a clamping branch circuit, a first primary switch, a transformer, a rectifier circuit, a resonant inductor, a resonant capacitor, and positive and negative output terminals. The clamping branch circuit includes a clamping capacitor and a second primary switch serially connected between the first and second terminals thereof. The first terminal is coupled to the positive input terminal. The first primary switch is connected between the second terminal and the negative input terminal. The primary winding of the transformer is connected to the clamping branch circuit in parallel. The rectifier circuit includes first and second bridge arms connected in parallel. Connection terminals in the first and second bridge arms are coupled to two terminals of the secondary winding of the transformer correspondingly. The first and second bridge arms are coupled between the positive and negative output terminals.
    Type: Grant
    Filed: May 24, 2022
    Date of Patent: May 28, 2024
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Zhongwang Yang, Qi Xia
  • Patent number: 11990362
    Abstract: A composite sintered body including: a metal oxide as a main phase; silicon carbide as a sub-phase; and silicate of a metal element that is included in the metal oxide, in which the average aggregation diameter of the silicate in the field of view of 600 ?m2 at a magnification of 1000 times is 5 ?m or lower.
    Type: Grant
    Filed: May 21, 2020
    Date of Patent: May 21, 2024
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Nobuhiro Hidaka, Megumi Ootomo, Jun Arikawa
  • Patent number: 11990830
    Abstract: A power conversion system according to the present disclosure includes a first circuit, a second circuit, and a third circuit. A first internal terminal, a second internal terminal, and a third internal terminal are electrically connected to the same connection unit. The third circuit provides an output voltage across a secondary winding of a transformer via a switching element and the transformer. The secondary winding is electrically connected to the third internal terminal. The output voltage has a waveform including a rising range in which the output voltage changes from a first potential to a second potential, a falling range in which the output voltage changes from the second potential to the first potential, and a flat range in which the output voltage is maintained at either the first potential or the second potential.
    Type: Grant
    Filed: March 5, 2020
    Date of Patent: May 21, 2024
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Fumito Kusama, Takaaki Norisada
  • Patent number: 11989045
    Abstract: Low drop-out (LDO) regulator circuits and methods that can operate at high frequencies without the adverse consequences of an oscillatory resonance effect from a capacitive load. In a first embodiment, a low pass filter (LPF) is coupled to the LDO and tuned to cancel the oscillatory resonance effect. In a second embodiment, the LPF is a second-order LPF and/or programmable. Since the tuning values of the programmable LPF may be programmatically selected, a much greater range of external capacitors values (with attendant ESR and ESL values), as well as a wider range of system parasitic capacitances, can be accommodated while maintaining system stability. Some variants of the second embodiment include an oscillation detector and filter bit control circuit that allows the tuning values of the programmable LPF to be dynamically determined and re-determined. An impedance-lowering device may be coupled to lower the impedance of the connection to the LPF.
    Type: Grant
    Filed: October 28, 2021
    Date of Patent: May 21, 2024
    Assignee: pSemi Corporation
    Inventors: Satish Kumar Vangara, Amr Ahmed Kamel
  • Patent number: 11984810
    Abstract: The anti-windup circuit generally has a voltage clamping device in series with a current limiting device operatively connectable to the output current path of a feedback compensator; the feedback compensator being part of a switch-mode power supply (SMPS) having an input voltage source and a load and generating constrained control values required to generate control on-off actions for tight power regulation. The inclusion of the disclosed anti-windup circuit in an SMPS may lead to hardware based overvoltage protection, reduced overall size and faster response to load changes.
    Type: Grant
    Filed: February 15, 2023
    Date of Patent: May 14, 2024
    Assignee: Appulse Power Inc.
    Inventor: Aleksandar Radic
  • Patent number: 11984250
    Abstract: A multi-winding inductor includes a magnetic core including three magnetic columns and two windings. Each winding includes a first, a second and a third portions. The first magnetic column is arranged between the first portion of the first winding and the first portion of the second winding; the second magnetic column is arranged on one side of the first portion of the first winding and the third portion of the second winding; and the third magnetic column is arranged between the third portion of the first winding and the third portion of the second winding. The first and the second portions of two windings respectively form pins on opposite sides of the magnetic core.
    Type: Grant
    Filed: March 2, 2022
    Date of Patent: May 14, 2024
    Assignee: Delta Electronics (Shanghai) CO., LTD
    Inventors: Mingzhun Zhang, Jinping Zhou, Min Zhou, Shouyu Hong, Qingdong Chen
  • Patent number: 11984821
    Abstract: An inverter control device 200 includes a current control unit 210 that outputs a voltage commands (Vd*, Vq*), a modulation wave control unit 220 that generates a modulation wave based on the voltage commands (Vd*, Vq*), a pulse generation unit 230 that generates a PWM pulse for controlling an inverter 100 using a modulation wave and a carrier wave of a predetermined frequency, and a pulse shift unit 250 that corrects the phase of the PWM pulse such that the PWM pulse is output in a phase corresponding to a harmonic of a predetermined order of the modulation wave in the near-zero-cross region including the zero-cross point at which the modulation wave changes across 0.
    Type: Grant
    Filed: July 31, 2020
    Date of Patent: May 14, 2024
    Assignee: Hitachi Astemo, Ltd.
    Inventors: Toshiyuki Ajima, Takafumi Hara, Akihiro Ashida, Hirokazu Matsui
  • Patent number: 11979074
    Abstract: The invention relates to a motor suspension for rigid and watertight mounting of a motor to a housing of an electric device, an electric device comprising such a motor suspension and a hair cutting device comprising an electric device with such a motor suspension. The motor suspension comprises a motor fixation element, a sealing suspension element and a motor axis seal. The motor fixation element is configured to provide a rigid connection of a motor to a housing in one direction, while it provides some flexibility in another direction for not deforming the housing. The sealing suspension element is configured for providing a fluid-tight connection to the housing, and the motor axis seal is configured for providing a fluid tight connection of the sealing suspension element to a rotational axis of the motor.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: May 7, 2024
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Marcus Franciscus Eijkelkamp, René Van Den Berg, Michiel Allan Aurelius Schallig, Marcel Hilco Zijlstra, Harold Wolf, Rob Roetert, Hendrik Klaas Haagsma
  • Patent number: 11979018
    Abstract: A method for over current protection includes: when receiving an overcurrent signal that representing an output current of DC-DC conversion module exceeds a OCP value sent by a DC-DC conversion module, controlling a protection module to be disconnected, cutting off an external insertion apparatus, so that the on-board circuit is not powered off; keeping outputting a first enable signal to the DC-DC conversion module within third preset duration longer than first preset duration, and after the first preset duration, determining whether the overcurrent signal sent by the DC-DC conversion module is re-received; if yes, it indicates that overcurrent occurs in the on-board circuit portion, controlling the DC-DC conversion module to be turned off, to stop supplying power for the on-board circuit; if no, keeping controlling the protection module to be disconnected, and continuing to merely supply power to the on-board circuit.
    Type: Grant
    Filed: January 28, 2022
    Date of Patent: May 7, 2024
    Assignee: INSPUR SUZHOU INTELLIGENT TECHNOLOGY CO., LTD.
    Inventor: Xuebao Qi
  • Patent number: 11973410
    Abstract: A method for determining an intermediate circuit voltage UDC,Ideal in an electrical system, which includes a battery, a DC-DC converter, a DC-AC converter, and an electrical machine. The battery is connected to the DC-DC converter, the DC-DC converter is connected to the DC-AC converter, and the DC-AC converter is connected to the electrical machine. An intermediate circuit of the electrical system is formed by the DC-DC converter and the DC-AC converter. A line-to-line voltage ÛLL, which is applied to a conductor of the electrical machine, is determined, wherein a maximum degree of modulation mmax of the line-to-line voltage ÛLL is determined.
    Type: Grant
    Filed: January 4, 2022
    Date of Patent: April 30, 2024
    Assignee: AUDI AG
    Inventor: Franz Honkomp
  • Patent number: 11973420
    Abstract: An aspect of the present invention is a voltage supply device including: a controller which outputs a signal indicating any one bus voltage determined by negotiation among a plurality of bus voltages from a power supply circuit to an external device; a reference voltage generation unit which generates a reference voltage corresponding to the signal; a detection voltage output unit which detects the bus voltage and outputs a detection voltage; a comparison unit which compares the detection voltage with the reference voltage; and a switch unit which switches the supply state of the bus voltage to the external device in response to the comparison result.
    Type: Grant
    Filed: October 28, 2019
    Date of Patent: April 30, 2024
    Assignee: SHARP NEC DISPLAY SOLUTIONS, LTD.
    Inventor: Yuta Nagano
  • Patent number: 11973340
    Abstract: A line current iM(k0) of an M side of a first direct-current transmission line is collected at a moment k0. A line current iM(k0?ts) thereof is collected at k0?ts. At a moment k0, a differential value diM(k0) of a current of the side of the first direct-current transmission line is calculated according to the line current iM(k0) and the line current iM(k0?ts). It is determined whether the differential value diM(k0) of the current meets a protection enabling criteria. If so, direct-current protection for the M side of the first direct-current transmission line is enabled. A line current iM(j) of the M side of the first direct-current transmission line is collected at a moment j. A line current iM(j?ts) thereof is collected at a moment j?ts. A differential value diM(j) of the current of the M side of the first direct-current transmission line at the moment j is calculated according to the line current iM(j) and the line current iM(j?ts).
    Type: Grant
    Filed: June 18, 2020
    Date of Patent: April 30, 2024
    Assignees: CHINA ELECTRIC POWER RESEARCH INSTITUTE, STATE GRID CORPORATION OF CHINA
    Inventors: Zexin Zhou, Huanzhang Liu, Pengfei Lv, Hong Cao, Xingguo Wang, Siye Ruan, Dingxiang Du, Yong Li, Guosheng Yang, Mingliang Jin
  • Patent number: 11971734
    Abstract: Disclosed is a low dropout linear voltage regulator and a control circuit thereof. The control circuit comprises an error amplifier, a foldback current-limiting protection circuit, an undershoot suppression circuit and an output detection circuit. The foldback current-limiting protection circuit limits the output current of power transistor and performs short circuit protection, the undershoot suppression circuit pulls the control terminal of the power transistor to low voltage level when the output voltage undershoots.
    Type: Grant
    Filed: September 4, 2020
    Date of Patent: April 30, 2024
    Assignee: SG MICRO CORP
    Inventor: Lidi Zhang
  • Patent number: 11973432
    Abstract: First switches include first electrodes, which are mutually connected with each other via a first internal bus bar, and second electrodes, which are mutually connected with each other via a second internal bus bar. A first resin member encapsulates the first switches and the first and second internal bus bars. Second switches include third electrodes, which are mutually connected with each other via a third internal bus bar, and fourth electrodes, which are mutually connected with each other via a fourth internal bus bar. A second resin member that encapsulates the second switches and the third and fourth internal bus bars. The second module is arranged alongside with the first module. The second internal bus bar and the third internal bus bar are partially exposed from the first resin member and the second resin member, respectively, and are directly joined with each other.
    Type: Grant
    Filed: March 9, 2022
    Date of Patent: April 30, 2024
    Assignee: DENSO CORPORATION
    Inventors: Hiromi Ichijyo, Yuu Yamahira, Kazuya Takeuchi, Masanori Sakata, Masayoshi Nishihata
  • Patent number: 11973437
    Abstract: A power conversion device includes, for respective phases of an AC circuit, leg circuits each having a pair of arms connected in series to each other, each arm including a plurality of converter cells which are connected in series and each of which has an energy storage element. A controlling circuitry includes a zero-phase-sequence voltage command value adjustment unit for correcting arm voltage command values for the arms by a zero-phase-sequence voltage command value. The command value correction circuitry performs adjustment control for adjusting the zero-phase-sequence voltage command value so that at least one arm voltage command value becomes equivalent to a limit value of the output voltage range of the arm.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: April 30, 2024
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Miwako Tanaka, Takushi Jimichi, Akito Nakayama
  • Patent number: 11967900
    Abstract: An embodiment voltage converter includes a first transistor connected between a first node of the converter and a second node configured to receive a power supply voltage, a second transistor connected between the first node and a third node configured to receive a reference potential, a first circuit configured to control the first and second transistors, and a comparator including first and second inputs. The first input is configured to receive, during a first phase, a first voltage ramp and, during a second phase, a set point voltage. The second input is configured to receive, during the first phase, the set point voltage and, during the second phase, a second voltage ramp.
    Type: Grant
    Filed: July 2, 2021
    Date of Patent: April 23, 2024
    Assignee: STMicroelectronics (Rousset) SAS
    Inventors: Sebastien Ortet, Olivier Lauzier
  • Patent number: 11967890
    Abstract: A frequency converter includes: at least one bridge arm, wherein a shunt resistor is arranged in the bridge arm; an evaluation device having an input connection, the evaluation device being designed to evaluate a measurement signal which is present at the input connection and which is dependent on a voltage drop across the shunt resistor, in order to determine a measured variable; and a voltage peak suppression device, which is designed to short-circuit the input connection of the evaluation device when a voltage peak occurs at the shunt resistor.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: April 23, 2024
    Assignee: Lenze SE
    Inventors: Robin Stahel, Andreas Burgermeister