Including Inverter Patents (Class 318/801)
  • Patent number: 11329593
    Abstract: Switching control of an inverter is performed such that rising and falling of a terminal voltage of U phase including upper and lower arm switching elements are calculated, and the calculated rising of the terminal voltage of U phase and falling of a terminal voltage of V phase or W phase or the calculated falling of the terminal voltage of U phase and rising of the terminal voltage of V phase or W phase are synchronized with each other.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: May 10, 2022
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shota Hanioka, Masahiro Iezawa
  • Patent number: 11303127
    Abstract: The current disclosure provides methods and systems for intelligent load management in off-grid AC systems and provides methods and systems to control and prioritize loads, so that supply and demand can be balanced via an extremely robust and reliable system.
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: April 12, 2022
    Assignee: University of South Carolina
    Inventors: Enrico Santi, Andrew Wunderlich
  • Patent number: 11296643
    Abstract: A motor driving apparatus for a home appliance includes: a power supply part configured to supply DC power, a DC-Link capacitor connected to the power supply part, an inverter connected to the DC-Link capacitor and comprising a plurality of switching elements, the inverter being configured to convert, by operating the plurality of switching elements, the DC power into AC power and output the converted AC power to a motor, a DC-Link resistor element disposed between the DC-Link capacitor and the inverter, a signal generator connected to the DC-Link resistor element and configured to generate and output a plurality of signals based on an output current flowing through the DC-Link resistor element, and a controller configured to control the inverter based on the plurality of signals received from the signal generator.
    Type: Grant
    Filed: July 2, 2020
    Date of Patent: April 5, 2022
    Assignee: LG Electronics Inc.
    Inventors: Seongju Kim, Donggeun Lee
  • Patent number: 11296536
    Abstract: A charging power supplying system using a motor driving system includes an inverter that is connected to a battery, includes at least one switching device, and is configured to change an on/off state of the switching device and to convert power stored in the battery to output the converted power to an output terminal of the inverter, a motor including a plurality of coils that each receive power provided from the output terminal of the inverter, a charging power output terminal that is connected to a neutral point to which the plurality of coils of the motor is commonly connected and outputs current output from the neutral point to an external charging target, and a controller configured to control the switching device in the inverter based on current of the output terminal of the inverter.
    Type: Grant
    Filed: November 11, 2019
    Date of Patent: April 5, 2022
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Yong Jae Lee, Jae Ho Hwang, Joo Young Park, Su Hyun Bae
  • Patent number: 11273712
    Abstract: Provided is an AC electric motor control device capable of detecting, in an AC electric motor drive device, abnormal operation of an AC electric motor or abnormal operation due to, for example, a sudden change of a load without an erroneous operation regardless of the operational state of the AC electric motor. When driving a three-phase AC electric motor by an inverter, inside a controller, an electric motor constant is calculated using at least one of the current, voltage, and rotational speed of the electric motor and the variation of the constant value is analyzed, thereby detecting abnormal operation of the electric motor or abnormal operation of a load device connected to the electric motor. In order to analyze the constant, a variation to be determined to be abnormal is preset or an abnormal value is calculated in comparison with the accumulated values of past constant changes. Alternatively, only the variation of the constant calculated in the controller is extracted to detect abnormality.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: March 15, 2022
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Yoshitaka Iwaji, Kazuaki Tobari, Yuuta Iwase, Yusaku Onuma
  • Patent number: 11277124
    Abstract: An overcurrent detection reference compensation system of a switching element for an inverter and an overcurrent detection system using the same can correct an overcurrent detection reference used to detect an overcurrent of a switching element according to a temperature of the switching element.
    Type: Grant
    Filed: July 8, 2020
    Date of Patent: March 15, 2022
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Yoo Jong Lee, Ji Woong Jang, Ki Jong Lee, Sang Cheol Shin
  • Patent number: 11277088
    Abstract: For high frequency injection (HFI) transition disturbance elimination, a processor directs an HFI transition for a motor. The processor determines compensation pulse voltages for an HFI compensation pulse. The processor further injects a sum of the HFI compensation pulse and an HFI voltage into a current regulator voltage output signal for a compensation Pulse Width Modulation (PWM) cycle. The HFI compensation pulse settles an HFI current to a steady state.
    Type: Grant
    Filed: September 22, 2020
    Date of Patent: March 15, 2022
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Zhendong Zhang, Jacob Lamb
  • Patent number: 11251741
    Abstract: A motor control system for selectively controlling power from a power source to a load includes a PCB structure and a power converter affixed to the PCB structure that is operable to provide a controlled output power to the load. The motor control system also includes a standalone protection and control module mounted onto the at least one PCB structure so as to be electrically coupled therewith, the standalone protection and control module further including a front-end switching unit comprising a plurality of switching devices operable to selectively interrupt and control power flow from the power source to the power converter and to a bypass path that bypasses the power converter and a back-end switching unit positioned downstream from the front-end switching unit and comprising a plurality of switching devices operable to selectively interrupt power flow from the power converter and the bypass path to the load.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: February 15, 2022
    Assignee: Eaton Intelligent Power Limited
    Inventors: Kaijam M. Woodley, Joseph Paul Uphaus, Tua Xiong, Andrew D. Delimat
  • Patent number: 11239686
    Abstract: A motor vehicle, particularly a passenger car, contains an onboard electrical system having a number of electrical consumers, a generator and an onboard electrical system rechargeable battery. A bidirectional interface is provided for a rechargeable device battery of a mobile device such that the rechargeable device battery can be coupled to the onboard electrical system by the bidirectional interface and, when coupled, can both be charged by the onboard electrical system and be used as an additional energy source in the onboard electrical system.
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: February 1, 2022
    Assignees: HELLA GmbH & Co,. KGaA, LEONI Bordnetz-Systeme GmbH
    Inventors: Sebastian Kahnt, Hans Joachim Liebscher, Magnus Nigmann, Ilja Uljanow
  • Patent number: 11233468
    Abstract: The invention relates to a method for the closed-loop and open-loop control of two or more EC motors operated using a common converter, wherein for the purpose of setting the operating point of the EC motors, common open-loop or closed-loop control using at least one controller is provided, wherein a combination of at least two control options is provided and in this case a controlled variable regulates the voltage setting at the output of the converter such that the two or more EC motors follow an intended sequence of operating points in a stable manner.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: January 25, 2022
    Assignee: ebm-papst Mulfingen GmbH & Co. KG
    Inventors: Thomas Kilian, Sebastian Schroth, Marco Weckert, Georg Wiedmann, Ralph Wystup
  • Patent number: 11204041
    Abstract: The ideal design for a redundant orbitally driven electric ducted fan that can replace a family of current propeller and motor combinations in electric ducted fan designs by meeting air flow and pressure requirements while drawing less electric current to rotate and thus produce the required flow not only would reduce cost of operation over the life of the fan but opens new possibilities for electric powered vertical takeoff and landing vehicles with redundant drives improving safety of operation. The entry of flying machines using propellers and lifting fans such as hover bikes and quadcopters, manned or unmanned is driving a need to re-examine the application of force applied to rotate these fans to achieve a reduction in aircraft weight and increase flying time for a given battery charge or load of fuel.
    Type: Grant
    Filed: October 4, 2019
    Date of Patent: December 21, 2021
    Inventors: Stephen T Newton, Stephen T. Newton, II
  • Patent number: 11205986
    Abstract: An inverter device includes a motor, a power supply that supplies the motor with electric current, an inverter that, during regenerative operation of the motor, performs switching between a first state in which regenerative current generated in the motor is returned to the motor again and a second state in which the regenerative current is supplied to the power supply, a first detector that detects a first condition electrically acting on the inverter, a second detector that detects a second condition electrically acting on the power supply, and a determiner that performs a first determination to perform switching between the first state and the second state, based on a detection result by the first detector or the second detector.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: December 21, 2021
    Assignees: NIDEC CORPORATION, NIDEC ELESYS CORPORATION
    Inventors: Yuhi Nakada, Ryo Tachibana, Koji Mukaiyama
  • Patent number: 11192752
    Abstract: A drive control method and system for controlling an inverter during power disruptions in the operation of an elevator drive includes the steps of predetermining whether a hoist motor of the elevator drive will be operating in a motor mode, a balanced mode or a regenerative mode on commencement of the power disruption, and controlling the inverter in accordance with the predetermined operating mode after commencement of the power disruption.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: December 7, 2021
    Assignee: INVENTIO AG
    Inventors: Roman Camenzind, Thomas Eilinger, Om Prakash
  • Patent number: 11175647
    Abstract: A controller of a motor that drives a driven body includes: an inertia estimating unit that estimates inertia on the basis of feedback information (torque and current) of the motor; a computing unit that computes an acceleration or deceleration time constant of the motor from the estimation inertia estimated by the inertia estimating unit; a storage unit that stores an inertia difference which is a difference between the estimation inertia and at least one known actual inertia and a time constant difference which is a difference between an actual acceleration or deceleration time constant corresponding to the actual inertia and an acceleration or deceleration time constant calculated on the basis of the estimation inertia; and a correction unit that corrects the acceleration or deceleration time constant calculated by the computing unit using the inertia difference and the time constant difference stored in the storage unit.
    Type: Grant
    Filed: June 11, 2018
    Date of Patent: November 16, 2021
    Assignee: FANUC CORPORATION
    Inventors: Shunpei Tanaka, Kazunori Iijima
  • Patent number: 11159093
    Abstract: A 15-level multilevel inverter circuit includes an outer circuit, an inner circuit, a polarity changing circuit and a computing device. The outer circuit and the inner circuit include a plurality of DC voltage supplies. Each DC voltage supply has a positive and a negative terminal. The outer circuit, the inner circuit and the polarity changing circuit include a plurality of unidirectional power switches. Each unidirectional power switch is a transistor with a diode connected in parallel to the transistor. The computing device is configured to provide control signals to the gates of the plurality of the unidirectional power switches of the outer circuit and the inner circuit to add or subtract the voltage of each of inner DC voltage supplies to form square waveforms approximating sinusoidal waveforms, and to the gates of the plurality of the unidirectional power switches of the polarity changing circuit to switch the polarity of the voltage.
    Type: Grant
    Filed: April 16, 2021
    Date of Patent: October 26, 2021
    Assignee: King Abdulaziz University
    Inventors: Hussain Bassi, Muhyaddin Rawa
  • Patent number: 11159102
    Abstract: A voltage converter (110, 210) having a first bidirectional voltage line (112, 212), a second bidirectional voltage line (114, 214), a power storage element (L1) arranged between the first bidirectional voltage line and the second bidirectional voltage line, a switch element electronically coupled to the power storage element, a controller (141) for controlling the switch, and the controller configured and arranged to adjust a current flow between the first voltage line and the second voltage line such that a voltage level on the second bidirectional voltage line is substantially maintained at a target DC voltage.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: October 26, 2021
    Assignee: Moog Inc.
    Inventors: Mark J. Underhill, Danielle Reni, Raymond Druce
  • Patent number: 11128122
    Abstract: Electric drive devices having at least one power electronics module including at least one voltage circuit having power electronics components such as a converter, transformer, frequency inverter, power capacitor, circuit breaker and the like, and at least one fuse for interrupting the voltage circuit in the event of excess currents and/or voltages. The invention also relates to a wind turbine and similar large industrial electrical systems having such a drive device. The device can comprise at least one pyrotechnic fuse with a propellant charge for the irreversible interruption of the voltage circuit, wherein the pyrotechnic fuse is arranged in the voltage circuit of the power electronics module or immediately adjacent to at least one power electronics component such as a converter, frequency inverter, transformer, power capacitor or circuit breaker.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: September 21, 2021
    Inventor: Markus Eichler
  • Patent number: 11121665
    Abstract: Integrated circuitry, such as a microcontroller, for controlling an electric motor includes circuitry for measuring a bi-directional current flowing within a coil of the electric motor. The current is sensed by an externally implemented current sensing element, such as a shunt resistor, to produce a differential voltage that is delivered to input pins of the microcontroller, which are protected by electrostatic discharge protection circuits. Current sources implemented within the microcontroller are coupled to the input pins, and work in concert with external resistors to shift the differential voltage so that it is maintained within an appropriate voltage operating range so that an accurate measurement of the bi-directional current can be made by the microcontroller.
    Type: Grant
    Filed: April 7, 2020
    Date of Patent: September 14, 2021
    Assignee: NXP USA, Inc.
    Inventor: Hubert Martin Bode
  • Patent number: 11095238
    Abstract: An electric tool includes a motor, a drive circuit, a power supply and a controller. The motor includes a rotor and first, second, and third phase windings. The drive circuit is electrically connected to the first, second, and third phase windings and drives the motor to output power. The power supply is electrically connected to the drive circuit and supplies power to the first, second, and third phase windings through the drive circuit. The controller is connected to the drive circuit and outputs a control signal to control the drive circuit. The controller controls the drive circuit according to a rotation position of the rotor when a voltage of the power supply is less than or equal to a preset voltage threshold so that the first, second, and third phase windings are simultaneously connected to the power supply.
    Type: Grant
    Filed: December 28, 2020
    Date of Patent: August 17, 2021
    Assignee: Nanjing Chervon Industry Co., Ltd.
    Inventors: Wencheng Li, Hongwei Wang, Qian Xu
  • Patent number: 11081991
    Abstract: A system includes a motor operating with an angular velocity and an operational current, a motor controller circuit to issue control signals to the motor, and a stator resistance calculation circuit. The calculation circuit is to introduce a perturbation signal to the motor through the control signals issued by the motor controller circuit, observe operations of the motor in response to the perturbation signal, estimate stator resistance of the motor based upon the observations of the operations of the motor in response to the perturbation signal, adjust operation of the motor based upon a changed stator resistance.
    Type: Grant
    Filed: December 3, 2019
    Date of Patent: August 3, 2021
    Assignee: MICROCHIP TECHNOLOGY INCORPORATED
    Inventor: Joel Steenis
  • Patent number: 11079151
    Abstract: A system includes an electronic power converter and a controller. The electronic power converter supplies power to one or more motor drives of an HVAC and/or refrigeration system. The controller obtains a plurality of pulse width modulation (PWM) algorithms. Each PWM algorithm has an associated harmonic signature. The controller further determines one or more resonance frequencies associated with the HVAC and/or refrigeration system. The controller also selects a first PWM algorithm from the plurality of PWM algorithms based at least in part on the harmonic signature associated with the first PWM algorithm mitigating the one or more resonance frequencies associated with the refrigeration system. The controller further operates the electronic power converter according to the first PWM algorithm.
    Type: Grant
    Filed: June 15, 2020
    Date of Patent: August 3, 2021
    Assignee: Lennox Industries Inc.
    Inventor: Palanivel Subramaniam
  • Patent number: 11012002
    Abstract: A single-phase voltage source inverter including a first stage configured to be connectable to a DC source, and a second stage configured to be connectable to an AC load, the first stage including a bridge leg including first and second decoupling switches, the bridge leg connected through an inductor to a decoupling capacitor, where the decoupling capacitor is in series with the DC source when the inverter is connected to the DC source, and the second stage including a bi-directional H-bridge inverter including first, second, third and fourth switches. The decoupling capacitor can be a small film capacitor. The first and second decoupling switches are the only decoupling switches in the bridge leg. The first controller can use pulse width modulation and the second controller uses sinusoidal pulse width modulation. The first controller can use pulse width modulation and the second controller uses pulse energy modulation.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: May 18, 2021
    Assignee: University of New Brunswick
    Inventors: Shuang Xu, Liuchen Chang, Riming Shao
  • Patent number: 11012021
    Abstract: An inverter device includes gate driving circuits for upper and lower arms of a bridge circuit, a first power supply supplying a power supply voltage to each driving circuit, and a second power supply having a reference potential different from that of the first power supply. The inverter device also includes a first fail-safe circuit having a reference potential common to the first power supply and generating driving commands with respect to the upper and lower arms, and a second fail-safe circuit having a reference potential common to the second power supply and generating driving commands with respect to the upper or lower arm. The lower arm gate driving circuit has two driving command input functions having different reference potentials, one function inputs the driving commands from the first fail-safe circuit, and the other function inputs the driving commands from the second fail-safe circuit.
    Type: Grant
    Filed: February 21, 2020
    Date of Patent: May 18, 2021
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Masaki Hirakata
  • Patent number: 11002360
    Abstract: The present disclosure may provide a shift range control apparatus that controls on-off operations of switching elements in a driver circuit, drives a motor, and switches a shift range. The shift range control apparatus may be configured to determine an abnormality of a rotation angle sensor detecting a rotation angle of the motor, to control a drive of the motor using a detection value, and to execute a control which switches an energization phase every energization phase switching period without using the detection value of the rotation angle sensor in response to that the rotation angle sensor is abnormal.
    Type: Grant
    Filed: August 27, 2019
    Date of Patent: May 11, 2021
    Assignee: DENSO CORPORATION
    Inventor: Shigeru Kamio
  • Patent number: 10965238
    Abstract: A power conversion apparatus includes a power converter circuit that outputs an AC power to an electric motor, and circuitry that controls the power converter circuit to add a first change, accompanying a change of a power generated by the electric motor, to a first phase angle, which is a phase angle of a magnetic flux direction of the electric motor corresponding to the AC power, extracts a component generated by the first change from first information indicating the electric power supplied to the electric motor, and estimates the power generated by the electric motor based on the component.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: March 30, 2021
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Shingo Fukumaru, Hideaki Iura, Shinya Morimoto, Akira Yamazaki
  • Patent number: 10951041
    Abstract: A motor system provided with one motor, two batteries, and two inverters further includes a charger which is connected to a first battery and supplies external power; and a control unit which controls drive of the first inverter and the second inverter to drive the motor. When the second battery is charged with the external power, the control unit drives the first inverter and the second inverter to allow power from the first inverter to be transmitted to the second battery through the motor and the second inverter while the motor is in a stationary state.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: March 16, 2021
    Assignee: Denso Corporation
    Inventors: Kiyotaka Matsubara, Makoto Nakamura, Daigo Nobe, Ryuji Omata
  • Patent number: 10951154
    Abstract: A motor driving circuit including a first and a second driving signal output circuit is configured to selectively output a six-step square wave driving signal from the first driving signal output circuit, or a space-vector driving signal from the second driving signal output circuit to an inverter to drive a motor according to whether an operating power exceeds a power threshold. The first driving signal output circuit is configured to generate the six-step square wave driving signal. The second driving signal output circuit is configured to generate the space-vector driving signal.
    Type: Grant
    Filed: May 12, 2019
    Date of Patent: March 16, 2021
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Chih-Hung Hsiao, Chia-Pin Wei, Yu-Wei Lee, Wei-Shuo Tseng
  • Patent number: 10873272
    Abstract: A locus of integrals, in terms of time, of unit voltage vectors forms a loop within a period shorter than a reciprocal of a maximum value of an operating frequency, in terms of electrical angle, of a compressor motor, the unit voltage vectors being voltage vectors that are units composing an instantaneous space vector indicating voltage which an inverter for driving the compressor motor outputs except in a dead time period.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: December 22, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Minoru Kitou, Naoto Kobayashi
  • Patent number: 10847999
    Abstract: Disclosed herein is a wireless power receiving device that includes a power receiving coil that takes in AC power via a magnetic field, and a rectifier that converts the AC power to DC power and outputs the DC power to a load. The rectifier includes a plurality of diodes bridge-connected to each other, the plurality of diodes including a first diode whose anode is connected to one input terminal of the rectifier and a second diode whose cathode is connected to the one input terminal of the rectifier; a first capacitor connected in parallel with the first diode; and a second capacitor connected in parallel with the second diode. Capacitances C1 and C2 of the first and second capacitor satisfy C1<1/(2fRLmax) and C2<1/(2fRLmax) where a frequency of the AC power is denoted by f, and a maximum resistance value of the load is denoted by RLmax.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: November 24, 2020
    Assignee: TDK CORPORATION
    Inventor: Akihiro Il
  • Patent number: 10840832
    Abstract: A permanent-magnet three-phase duplex motor is provided with two systems, namely a system that includes a first three-phase winding and a first inverter circuit, and a system that includes a second three-phase winding and a second inverter circuit, and a controlling apparatus is configured such that when one system fails, the controlling apparatus stops operation of the inverter circuit of the failed system, and controls operation of the inverter circuit of the normal system to increase the driving current that is supplied from the inverter circuit of the normal system, and the first three-phase winding and the second three-phase winding are configured such that magnetic fields that act on the permanent magnets in a demagnetizing direction when the increased driving current is supplied from the inverter circuit of the normal system are equal to magnetic fields that normally act on the permanent magnets in the demagnetizing direction.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: November 17, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Satoru Akutsu, Yoshihito Asao
  • Patent number: 10826424
    Abstract: A cascaded inverter system is described and includes an electric machine that is electrically connected in series between first and second inverters. A controller is in communication with the first and second inverters, and includes an executable instruction set. A first dead-time compensation term and a first voltage compensation term are determined based upon an initial phase current and a switching frequency for the first inverter, and a final first duty cycle is determined based thereon. Simultaneously, a second dead-time compensation term and a second voltage compensation term are determined based upon the inverted initial phase current and a switching frequency for the second inverter, and a final second duty cycle is determined based thereon. Operation of the first and second inverters are dynamically controlled based upon the final first duty cycle and the final second duty cycle, respectively.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: November 3, 2020
    Assignee: GM Global Technology Operations LLC
    Inventors: Brian A. Welchko, Brent S. Gagas
  • Patent number: 10807474
    Abstract: Disclosed is a driving circuit for an electric vehicle having a battery pack and an inverter, and a control method thereof. The driving circuit includes a first contactor connected between a first terminal of the battery pack and a first terminal of a capacitor included in the inverter, a second contactor and a current limiting circuit connected to the first contactor in parallel, and a control unit configured to control operations of the first contactor and the second contactor. The second contactor and the current limiting circuit are connected to each other in series. The current limiting circuit includes at least one resistor, wherein the control unit outputs a first control signal when the first contactor is normally operating and outputs a second control signal when the first contactor is abnormally operating. The first control signal induces the first contactor to turn on, and the second control signal induces the second contactor to turn on.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: October 20, 2020
    Assignee: LG CHEM, LTD.
    Inventor: Jeong-Joo Song
  • Patent number: 10778133
    Abstract: A method for operating at least one electric machine that is designed to drive a vehicle, in which a value is determined for at least one operating parameter of the vehicle, wherein a change is predicted for the torque of the at least one electric machine at a target time point from the value of the at least one operating parameter, wherein a current for a magnetization of the at least one electric machine prior to the target time point is set at a value, wherein the value of the current for the magnetization at the target time point is changed and adapted.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: September 15, 2020
    Assignee: AUDI AG
    Inventors: Sebastian Heber, Martin Adam
  • Patent number: 10752117
    Abstract: Disclosed is a driving circuit for an electric vehicle having a battery pack and an inverter, and a control method thereof. The driving circuit includes a first contactor connected between a first terminal of the battery pack and a first terminal of a capacitor included in the inverter, a second contactor and a current limiting circuit connected to the first contactor in parallel, and a control unit configured to control operations of the first contactor and the second contactor. The second contactor and the current limiting circuit are connected to each other in series. The current limiting circuit includes at least one resistor, wherein the control unit outputs a first control signal when the first contactor is normally operating and outputs a second control signal when the first contactor is abnormally operating. The first control signal induces the first contactor to turn on, and the second control signal induces the second contactor to turn on.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: August 25, 2020
    Assignee: LG CHEM, LTD.
    Inventor: Jeong-Joo Song
  • Patent number: 10749455
    Abstract: An ohmic-inductive electrical load, such as an electric motor, for example, for a hard-disk drive, is driven by supplying thereto a load current via a switching power stage supplied with a source current delivered by a supply source. The driving action may include sensing the load current; estimating the source current starting from the load current sensed; generating a feedback signal that assumes different values as a function of the result of the comparison between the source current estimated and a source-current threshold value; and driving the switching power stage via the feedback signal, increasing or decreasing, respectively, as a function of the different values assumed by the feedback signal, the load current, thereby controlling the source current.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: August 18, 2020
    Assignee: STMICROELECTRONICS S.R.L.
    Inventors: Michele Boscolo Berto, Ezio Galbiati
  • Patent number: 10734918
    Abstract: A welding or cutting device includes a first transistor coupled between a first node and a second node. The first transistor controls current and voltage provided to an inductor during a welding or cutting operation. The welding or cutting device also includes a first diode coupled in series with the first transistor between the second node and a third node, and a second diode coupled in parallel with the first transistor and the first diode between the first node and a fourth node. Additionally, the welding or cutting device includes a second transistor coupled in series with the second diode and in parallel with the first transistor and the first diode between the fourth node and the third node. The second transistor controls a voltage applied to a transistor during a freewheeling operation of the inductor.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: August 4, 2020
    Assignee: Illinois Tool Works Inc.
    Inventor: Anthony Van Bergen Salsich
  • Patent number: 10651768
    Abstract: Provided are a motor control device and a method for controlling a motor control device. A switching frequency is varied with respect to a control sampling for controlling an inverter, whereby controlling is performed by securing a required control sampling according to a motor speed.
    Type: Grant
    Filed: July 26, 2019
    Date of Patent: May 12, 2020
    Assignee: LG ELECTRONICS INC.
    Inventors: Yonghwa Lee, Donggeun Lee, Jeongeon Oh
  • Patent number: 10644631
    Abstract: A method estimating position and speed of a rotor of an alternating current machine for a motor vehicle.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: May 5, 2020
    Assignees: RENAULT S.A.S., NISSAN MOTOR CO., LTD.
    Inventors: Mohamad Koteich, Abdelmalek Maloum
  • Patent number: 10615657
    Abstract: A DC machine for connection to an electrical system may include a stator configured as a portion of the DC machine; a rotor configured as a portion of the DC machine being rotatable with respect to the stator; and a control circuit to control the rotor to allow the rotor to continuously slip with respect to the stator.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: April 7, 2020
    Assignee: MSSB MOTOR TECHNOLOGY, LLC
    Inventor: Sam R Hunt
  • Patent number: 10608561
    Abstract: Provided is a control device of an AC motor, including: an inverter including a switching element; switching control means for controlling the switching element; and phase detection means for detecting a rotor phase of an AC motor, wherein the switching control means controls the switching element so that a voltage waveform of the inverter has half-wave symmetry in an interval of a width centering on a fundamental voltage phase of 180 degĀ±180 deg, the switching control means controls the switching element so that a harmonic voltage phase of the inverter becomes variable on the basis of a fundamental voltage-rotor phase difference which is a difference between a fundamental voltage phase and the rotor phase of the AC motor, and the switching control means controls the switching element so that a harmonic voltage amplitude of each order of the inverter is inversely proportional to the order.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: March 31, 2020
    Assignee: Hitachi, Ltd.
    Inventors: Satoshi Sumita, Yoshitaka Iwaji
  • Patent number: 10606742
    Abstract: A power electronics device with an improved human interface module (HIM) is provided. More specifically, a motor drive is provided that includes a HIM with a portable memory device that stores the programming configuration of the motor drive. The improved HIM with portable memory enables improved techniques for quickly and efficiently updating the programming configuration of one or several motor drives.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: March 31, 2020
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Scott D. Braun, Wanda J. Miller, Calvin C. Steinweg
  • Patent number: 10585122
    Abstract: A current detection circuit includes: a resistor in a current path; first and second signal transmission units that transmit signals of first and second terminal sides of the resistor; a first difference operation unit that executes a difference operation on the signals transmitted by the first and second signal transmission units; a noise-capturing transmission unit starting point; third and fourth signal transmission units connected with the noise-capturing transmission unit starting point; a second difference operation unit that executes a difference operation on the signals transmitted by the third and fourth signal transmission units; and a summing operation unit that executes a summing operation on the first and second difference signals, wherein the first signal transmission unit and the fourth signal transmission unit are disposed close to each other and the second signal transmission unit and the third signal transmission unit are disposed close to each other.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: March 10, 2020
    Assignee: FANUC CORPORATION
    Inventors: Kunio Tsuchida, Taku Sasaki, Kiichi Inaba
  • Patent number: 10581361
    Abstract: A vehicle may include an electric machine including windings having a nonzero phase offset. The vehicle may further include first and second inverters configured to drive the electric machine as a result of toggling of switches. The switches may be toggled according to respective pulse width modulation (PWM) signals. One or more gate drivers may be configured to generate the PWM signals. The PWM signals may be based on fundamental waveforms having a phase shift that is based on the nonzero phase offset of the electric machine.
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: March 3, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Lihua Chen, Baoming Ge, Shuitao Yang, Shahram Zarei
  • Patent number: 10525843
    Abstract: An electric drive system for a vehicle includes an electric machine having first conductors arranged in slots of a stator to form phase windings and a second conductor arranged in the slots to form a secondary winding that produces a voltage indicative of a common mode voltage caused by voltages applied to the phase windings. The voltage can be used to supply power to electronic components and for diagnosis and control of the electric machine and an associated inverter.
    Type: Grant
    Filed: June 19, 2018
    Date of Patent: January 7, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Jiyao Wang, Wei Xu, Yinghan Xu, Silong Li
  • Patent number: 10523150
    Abstract: Systems and methods are disclosed herein for monitoring and detecting a loss of synchronism in an electric motor, such as a synchronous motor. A monitoring system may compare a measured or provided electric power system frequency with a measured rotational frequency of the rotor of the electric motor. The rotational frequency of the rotor may be obtained from a shaft-mounted device. The monitoring system may determine a slip condition and/or a loss of synchronism of the electric motor.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: December 31, 2019
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventor: Marcos A. Donolo
  • Patent number: 10491132
    Abstract: A control circuit for converting an unbalanced grid voltage into a DC voltage is provided. The control circuit includes a controller having a voltage detection module, a first transformation module, a level shift module, and a second transformation module. The voltage detection module provides voltage component values indicating the voltage in each phase of a three-phase AC power supply. The first transformation module converts the voltage component values from a stationary reference frame into reference voltage signals in a rotating reference frame using a Clarke-Park transform. The level shift module compensates the reference voltage signals to simulate a balanced three-phase AC voltage. The second transformation module converts the compensated reference voltage signals from the rotating reference frame to the stationary reference frame using an inverse Clarke-Park transform.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: November 26, 2019
    Assignee: HELLA GmbH & Co., KGaA
    Inventors: Philip Michael Johnson, Alan Wayne Brown
  • Patent number: 10476414
    Abstract: A driving circuit for an electric motor including multiple windings includes a sensing circuit to sense motor winding currents. A motor rotation angle signal is generated from the sensed currents and motor control voltages are generated as a function of the motor rotation angle signal. The motor windings are driven with motor drive voltages obtained by injecting into the motor control voltages injection pulses. The sensed currents include both torque components and injection components. The motor rotation angle signal is generated as a function of the injection components of the sensed currents.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: November 12, 2019
    Assignees: STMicroelectronics Design and Application S.R.O., STMicroelectronics S.r.l.
    Inventors: Jiri Ryba, Gianluigi Forte, Andrea Spampinato
  • Patent number: 10473268
    Abstract: A gas supply apparatus includes; a compressor unit including a compression section compressing hydrogen gas and storing pressure accumulators with the compressed hydrogen gas and a drive portion including an electric motor as drive source and driving the compression section; and a control unit controlling the electric motor. The electric motor has output characteristics where rated torque can be maintained against rotational speed changes in a standard rotation region, rotation region at or below standard speed, and output torque decreases from the rated torque as electric motor rotational speed increases in an overspeed region, rotation region above the standard speed. The control unit performs, in at least part of a storage process where the compression section stores the pressure accumulators with the hydrogen gas until set pressure is reached, overspeed operation control for allowing driving of the electric motor in the overspeed region.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: November 12, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Takashi Okuno, Koichiro Hashimoto, Kenji Nagura
  • Patent number: 10466763
    Abstract: A clocked electronic device includes first and second control systems. The first control system is configured to decrease clock frequency in the device in response to decreasing supply voltage. The second control system is responsive to clock lag in the device and to an amount of current drawn through the device. It is configured to increase the supply voltage in response to increasing clock lag, but to decrease the supply voltage when the current drawn through the device exceeds an operational threshold.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: November 5, 2019
    Assignee: Nvidia Corporation
    Inventor: Shuang Xu
  • Patent number: 10438876
    Abstract: According to an exemplary implementation, a power quad flat no-lead (PQFN) package includes a driver integrated circuit (IC) situated on a leadframe. The PQFN package further includes low-side U-phase, low-side V-phase, and low-side W-phase power switches situated on the leadframe. A logic ground of the leadframe is coupled to a support logic circuit of the driver IC. A power stage ground of the leadframe is coupled to sources of the low-side U-phase, low-side V-phase, and low-side W-phase power switches. The power stage ground can further be coupled to gate drivers of the driver IC.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: October 8, 2019
    Assignee: Infineon Technologies Americas Corp.
    Inventors: Dean Fernando, Roel Barbosa, Toshio Takahashi