Patents Examined by Gary A Nash
  • Patent number: 11108333
    Abstract: A system includes a DC-DC power converter including a first pair of input/output lines for connecting to a first device for supplying power to or drawing power from the first device, and a second pair of input output lines for supplying power to or drawing from a second device. The system includes at least one ultra-capacitor connected across the first pair of input/output lines.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: August 31, 2021
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Frank Z. Feng, Christopher J. Courtney
  • Patent number: 11108334
    Abstract: Provided is a power conversion device which can be configured inexpensively and in which initial charging can be performed quickly. Accordingly, the power conversion device is provided with: a power conversion device cell having a first converter for converting a first AC voltage to a first DC voltage, a second converter for converting the first DC voltage to another voltage, and a first capacitor charged by the first DC voltage; and a control circuit for allowing charging of the first capacitor while changing the operational state of the first converter in accordance with the first DC voltage.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: August 31, 2021
    Assignee: Hitachi Industrial Products, Ltd.
    Inventors: Mizuki Nakahara, Takae Shimada, Kimihisa Furukawa, Mitsuhiro Kadota
  • Patent number: 11101712
    Abstract: An electric motor, an end cap thereof and a manufacturing method of the end cap are provided. The end cap includes an insulating body and a filter circuit board mounted to the insulating body. The filter circuit board includes at least two power conductors for receiving an external power source, an insulating support frame integral with the at least two power conductors, and at least one filter element. One end of the at least one filter element is connected to a corresponding power conductor, and the other end of the at least one filter element is grounded.
    Type: Grant
    Filed: July 11, 2018
    Date of Patent: August 24, 2021
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Yukwai Yeung, Chingsik Lau, Dawei Zhou, Siukin Tam, Tao Fu
  • Patent number: 11095232
    Abstract: A multi-level converter includes a plurality of capacitors coupled in series between first and second nodes of a DC port and coupled to one another at n?2 first intermediate nodes. The converter also includes a switching circuit including at least one first switch configured to couple the first node of the DC port to an input/output node, at least one second switch configured to couple the second node of the DC port to the input/output node, and at least three third switches configured to couple respective ones of the first intermediate nodes to the input/output node. The converter further includes a control circuit configured to control the first, second and third switches to provide an n-level converter.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: August 17, 2021
    Inventors: James Andrew McBryde, Swanand Juvekar
  • Patent number: 11095207
    Abstract: A power factor correction circuit with burst setting includes a conversion circuit, a control unit, and a burst setting circuit. The burst setting circuit respectively sets at least one burst period when an input power source is at a rising edge of a positive half cycle, a falling edge of the positive half cycle, the rising edge of a negative half cycle, and the falling edge of the negative half cycle, and provides a burst setting signal corresponding to the at least one burst period to the control unit so that the control unit limits the conversion circuit to perform a burst operation during the at least one burst period.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: August 17, 2021
    Assignee: ASIAN POWER DEVICES INC.
    Inventors: Yeu-Torng Yau, Tsung-Liang Hung
  • Patent number: 11088579
    Abstract: The present disclosure relates to a rotor (3) for an electric machine (1). The rotor (3) is composed of a support frame (5) having a centre section (8) and a plurality of spokes (9). The spokes (9) extend outwardly from the centre section (8). The spokes (9) each have at least first and second bridge elements (12A, 12B) formed by one or more flux barrier (13). The first and second bridge elements (12A, 12B) are configured to control magnetic flux leakage into said centre section (8). The present disclosure also relates to an electric machine (1) having a rotor (3) of this type.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: August 10, 2021
    Assignee: Jaguar Land Rover Limited
    Inventors: Alexandros Michaelides, Raymond William Long, Mohammad Kimiabeigi
  • Patent number: 11081954
    Abstract: A multiphase switching converter with automatic phase shedding control, wherein the multiphase switching converter includes a plurality of switching circuits coupled in parallel, and a plurality of control circuits configured in a daisy chain and respectively configured for driving a corresponding one of the plurality of switching circuits. Each of the control circuit generates a current threshold based on a corresponding sequence information, and compares a current indication signal indicative of a load current of the multiphase switching converter with the current threshold to determine whether to enter into a phase shedding mode.
    Type: Grant
    Filed: July 21, 2020
    Date of Patent: August 3, 2021
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Lijie Jiang, Yongheng Sun
  • Patent number: 11081961
    Abstract: According to one embodiment, a power convertor includes a buck-boost circuit to be applied with an input voltage to convert the input voltage into an output voltage for output, the input voltage being generated by a power generation module that generates direct-current power; a switching controller that executes maximum power-point tracking to control power conversion of the buck-boost circuit such that the power generation module generates maximum direct-current power; and a mode controller that causes the switching controller to execute the maximum power-point tracking when an input current from the power generation module is larger than a preset current threshold, and when the input current is equal to or less than the current threshold, causes the switching controller to stop the maximum power-point tracking, and cause the buck-boost circuit to output the input voltage as the output voltage without the power conversion.
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: August 3, 2021
    Assignee: TAIYO YUDENCO., LTD.
    Inventors: Akifumi Kosugi, Hiroshi Okawa, Yoshitugu Iijima, Masataka Sashikata, Yoji Imai
  • Patent number: 11081966
    Abstract: A power converter controller includes a control loop clock generator to generate a switching frequency signal responsive to a burst load threshold, a power signal, and a load signal. A switching frequency of the switching frequency signal is above a mechanical audio resonance range of an energy transfer element and above an audible noise frequency. A burst control circuit generates a burst on signal and a burst off signal in response to a feedback signal and a burst enable signal to operate the controller in a plurality of burst modes. A burst frequency of the burst on signal or the burst off signal is less than the mechanical audio resonance range. A request transmitter circuit generates a request signal responsive to the switching frequency signal, the burst on signal, and the burst off signal to control switching of a switching circuit.
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: August 3, 2021
    Assignee: POWER INTEGRATIONS, INC.
    Inventors: Robert J. Mayell, Yueming Wang, Roger Colbeck
  • Patent number: 11081956
    Abstract: A thermoelectric generator includes a voltage source including a thermoelectric element, a starting circuit connected to the voltage source, a DC to DC converter circuit connected to the voltage source, an output connected to the starting circuit and connected to the DC to DC converter circuit, and a controller having an input connected to the voltage source, and outputs connected to the starting circuit and to the DC to DC converter circuit. The controller deactivates the starting circuit and activates the DC to DC converter circuit when a voltage at the output or when a voltage provided by the voltage source rises above a predefined upper voltage threshold. Additionally, the controller reactivates the starting circuit and deactivates the DC to DC converter circuit when a voltage at the output or when a voltage provided by the voltage source drops below a predefined lower voltage threshold.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: August 3, 2021
    Assignee: The Swatch Group Research and Development Ltd
    Inventor: Francois Gueissaz
  • Patent number: 11075582
    Abstract: A phase-shifted full bridge (PSFB) switching converter includes a transistor full-bridge having first and second half-bridges. Each half-bridge includes a high-side transistor and a low-side transistor. A controller circuit is configured to generate a drive signal for each transistor. The (first/third and second/fourth) drive signals for the transistors of each half-bridge are periodic with a cycle period, pulse-width modulated and have a temporal offset to each other that equals half of the cycle period. The drive signals for the half-bridges are phase shifted-with respect to one another. The controller circuit also is configured to generate the first drive signal so that the first high-side transistor is switched off when the third drive signal indicates to switch on the second high-side transistor, and to generate the second drive signal so that the first low-side transistor is switched off when the fourth drive signal indicates to switch on the second low-side transistor.
    Type: Grant
    Filed: April 8, 2020
    Date of Patent: July 27, 2021
    Assignee: Infineon Technologies Austria AG
    Inventors: Manuel Escudero Rodriguez, Matteo-Alessandro Kutschak
  • Patent number: 11070134
    Abstract: A control method for a DC/DC converter and a DC/DC converter are provided. The method includes: providing a primary side driving signal to drive one or more primary side switches of the primary side circuit; providing a sixth signal, a fifth signal, a seventh signal and an eighth signal, where a phase shift angle exists between the sixth signal and the primary side driving signal, and the sixth signal, the fifth signal, the seventh signal and the eighth signal in turn have a predetermined phase difference; driving a sixth switch, a fifth switch, a seventh switch and an eighth switch according to the sixth signal, the fifth signal, the seventh signal and the eighth signal, respectively; where the switching frequency of the sixth signal, the fifth signal, the seventh signal or the eighth signal is half of the switching frequency of the primary side driving signal.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: July 20, 2021
    Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Hao Sun, Minli Jia, Jinfa Zhang
  • Patent number: 11070147
    Abstract: A resonant inverter apparatus supplies a high AC voltage to a discharge load. In this apparatus, an inverter circuit converts a DC voltage to an AC voltage using a plurality of switching elements. A transformer steps up the AC voltage and generates a high AC voltage. A DC voltage detecting unit detects a value of a DC voltage supplied to the inverter circuit. A control unit generates a driving pulse for performing on/off switching of the switching elements. The switching elements include first and second switching elements. The control unit performs phase angle control of the driving pulse. In response to the detected value of the DC voltage being greater than a reference value, the control unit sets a switching phase angle of the second switching element relative to the first switching element serving as reference, based on the magnitude of the valued of the DC voltage.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: July 20, 2021
    Assignee: DENSO CORPORATION
    Inventor: Shoichi Takemoto
  • Patent number: 11050361
    Abstract: A controller and a plurality of driver circuits may be configured to operate selectively either in a normal mode or in a diagnostic mode. In the normal mode, the controller is configured to transmit a drive signal to each driver circuit via a corresponding drive signal line. Each driver circuit is configured to drive corresponding switching element(s) in response to the drive signal and is further configured to output a failure signal when the driver circuit detects a failure related to the corresponding switching element(s). In the diagnostic mode, the controller is configured to sequentially transmit a request signal to the driver circuits via their corresponding drive signal lines, and each driver circuit is configured to output the failure signal in response to the request signal in a case of having detected the failure during operation in the normal mode.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: June 29, 2021
    Assignee: DENSO CORPORATION
    Inventor: Yoshihiko Hiya
  • Patent number: 11050360
    Abstract: Disclosed is a power conversion device having an AC conversion unit and a control unit that controls the AC conversion unit. The power conversion device also has: a temperature detection unit that outputs temperature data of the power conversion device; a current detection unit that outputs current data of an output of the AC conversion unit; a storage unit that stores specification data indicating a relationship between a rated current and a temperature specification and temperature data output by the detection unit; an overload protection unit that outputs a shutdown command to the control unit on the basis of the rated current and the current data output by the current detection unit; and a rating determination unit that acquires specification data and temperature data from the storage unit, determines a rated current corresponding to the acquired temperature data on the basis of the acquired specification data, and outputs the determined rated current to the overload protection unit.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: June 29, 2021
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventor: Yusuke Arao
  • Patent number: 11038436
    Abstract: A unit power cell of an inverter system, according to one embodiment of the present invention, comprises: a first leg including first and fourth switching elements, which are connected in series to each other, second and third switching elements, which are connected in series with each other between a connection point of the first and second switching elements and a smoothing unit, and first, second, third and fourth diodes, which are inversely and respectively connected in parallel with the first, second, third and fourth switching elements; and a second leg connected in parallel with the first leg and including fifth and sixth switching elements, which are connected in series to each other, and fifth and sixth diodes, which are inversely and respectively connected in parallel with the fifth and sixth switching elements.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: June 15, 2021
    Assignee: LSIS CO., LTD.
    Inventors: Sung-Guk Ahn, Seung-Ki Sul, Hyun-Sam Jung, Jeong-Mock Yoo
  • Patent number: 11031881
    Abstract: An output current synthesizer that synthesizes output currents output from a plurality of power inverter circuits converting direct current power to alternating current power and outputs the synthesized output currents as synthesized current having a predetermined frequency, the output current synthesizer includes a pair of conductors which is provided with each of the power inverter circuits and to which the output currents of the power inverter circuits flow, a reactor which is provided on each of the pairs of conductors and generates magnetic flux corresponding to a difference between values of currents flowing to the pairs of conductors to reduce the difference between the values of currents, a pair of conductive members to which the pairs of conductors are connected in parallel, and a pair of output terminals which is provided on the pair of conductive members and output the synthesized currents.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: June 8, 2021
    Assignee: NETUREN CO., LTD.
    Inventors: Takahiko Kanai, Yue Yang
  • Patent number: 11031869
    Abstract: A dual mode switching regulator includes a PWM/PFM control architecture with PFM frequency foldback based on extending switching cycle off time TOFF. A controller includes a PWM/PFM clock generator that, in response to assertion of a TOFF control signal, extends the nominal PWM switching cycle off-time TOFFnom for an extended off-time TOFFext (variable), so that switching cycle off-time is [TOFFnom+TOFFext]. A TOFF modulator generates the TOFF control signal based on generating a TOFF control voltage from an ITOFF control current equal to [IPWM-IPFM], generated by sourcing an IPWM reference current, and, in response to a PFM load condition, sinking an IPFM control current. The TOFF control signal is asserted when the TOFF control voltage is not substantially equal to a TOFF reference voltage at the end of TOFFnom, to cause the PWM/PFM clock generator to extend switching cycle off-time to [TOFFnom+TOFFext], with the duration of TOFFext determining PFM switching frequency.
    Type: Grant
    Filed: January 16, 2020
    Date of Patent: June 8, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Tawen Mei, David Zakharian, Karen Chan
  • Patent number: 11031864
    Abstract: An apparatus for power conversion includes a switching network that controls interconnections between pump capacitors in a capacitor network that has a terminal coupled to a current source, and a charge-management subsystem. In operation, the switching network causes the capacitor network to execute charge-pump operating cycles during each of which the capacitor network adopts different configurations in response to different configurations of the switching network. At the start of a first charge-pump operating cycle, each pump capacitor assumes a corresponding initial state. The charge-management subsystem restores each pump capacitor to the initial state by the start of a second charge-pump operating cycle that follows the first charge-pump operating cycle.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: June 8, 2021
    Assignee: pSemi Corporation
    Inventors: Aichen Low, Gregory Szczeszynski, David Giuliano
  • Patent number: 11031878
    Abstract: A resonant converter and a manufacturing method of a transformer thereof are provided. The resonant converter includes a full bridge circuit, an element, a first branch circuit, a second branch circuit and a secondary winding. The full bridge circuit includes a first node and a second node. The element includes an inductor or a capacitor. The first branch circuit includes a first primary winding. The second branch circuit includes a second primary winding, and the first and second primary windings have the same turn number. The transformer is constructed by the first and second primary windings and the secondary winding. The first branch circuit, the element and the second branch circuit are sequentially coupled in series between the first and second nodes. The first branch circuit and the second branch circuit are symmetrically located with respect to the element. The first and second branch circuits have the same impedance.
    Type: Grant
    Filed: March 9, 2020
    Date of Patent: June 8, 2021
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Da Jin, Yahong Xiong, Qinghua Su