Including Inverter Patents (Class 318/801)
  • 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: 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: 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: 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 deg±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
  • Patent number: 10422563
    Abstract: A control method includes initially operating a compressor at the same RPM as an operating RPM of the compressor during a previous cycle, adjusting the RPM in consideration of an operation rate of the previous cycle such that the RPM is increased when the operation rate is greater than a first set value, reduced when the operation rate is less than a second set value, and maintained when the operation rate is within a range between the first set value and the second set value, and operating the compressor at the adjusted RPM, the first set value being greater than the second set value.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: September 24, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Gwinan Hwang, Junhyo Koo, Sanghyun Song, Inguk Lee, Taehwan Hwang
  • Patent number: 10425017
    Abstract: A space vector PWM technique includes defining a target voltage vector located in a sector defined by two switching voltage vectors, applying one switching voltage vector to each leg of a power conversion device for a first subperiod of a fixed switching period, applying the other switching voltage vector to each leg for a second subperiod of the switching period and applying some allocation of zero voltage vectors to each leg for a third subperiod of the switching period such that the device outputs approximately the voltage defined by the target voltage vector during the switching period. The zero voltage vectors are allocated, based on a minimum amount of time specified for the current sensors to accurately sense current, such that the zero voltage vector which causes current to flow through the current sensors is applied for a different length of the third subperiod than the other zero voltage vector.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: September 24, 2019
    Assignee: Infineon Technologies AG
    Inventor: Weizhe Qian
  • Patent number: 10411619
    Abstract: An electric motor controller, an electric motor drive circuit, and methods for combined electric motor control are provided. The drive circuit is configured to drive a first electric motor and a second electric motor. The drive circuit includes a rectifier configured to convert an AC input voltage to a pulsed DC voltage, and a first DC link electrically coupled to the rectifier. The first DC-link includes a low-capacitance capacitor having a capacitance less than 10 ?F. The drive circuit also includes a first inverter coupled to the first DC-link, the first inverter configured to generate a conditioned output voltage to drive the first electric motor, a second DC-link electrically coupled to the first DC-link, and a second inverter coupled to the second DC-link. The second inverter is configured to generate a conditioned output voltage to drive the second electric motor.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: September 10, 2019
    Assignee: Regal Beloit America, Inc.
    Inventors: Ming Li, Roger Carlos Becerra, Ludovic Andre Chretien
  • Patent number: 10396019
    Abstract: An intelligent power module (IPM) has a first, second, third and fourth die paddles, a first, second, third, fourth, fifth and sixth metal-oxide-semiconductor field-effect transistors (MOSFETs), a tie bar, a metal slug, a plurality of spacers, a plurality of leads and a molding encapsulation. The molding encapsulation encloses the first, second, third and fourth die paddles, the first, second, third, fourth, fifth and sixth MOSFETs, the tie bar and the plurality of spacers. A bottom surface of the metal slug is exposed from the molding encapsulation. A process for fabricating the IPM comprises preparing the first, second, third and fourth die paddles, the first, second, third, fourth, fifth and sixth MOSFETs, the tie bar, the plurality of leads, the metal slug and the plurality of spacers and applying a molding process to form the molding encapsulation.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: August 27, 2019
    Assignee: ALPHA AND OMEGA SEMICONDUCTOR (CAYMAN) LTD.
    Inventors: Zhiqiang Niu, Bum-Seok Suh, Wonjin Cho, Jun Lu
  • Patent number: 10389296
    Abstract: There is disclosed a method for controlling an inverter in a solar pump system. The method includes; when a current DC link voltage is above or equal to a reference level, and when a previous output frequency of an alternating-current voltage applied to a load increased in a previous period, increasing an current output frequency of an AC voltage to be applied to the load at a first slope; and when the current DC link voltage is above or equal to the reference level, and when the previous output frequency of the AC voltage applied to the load decreased in the previous period, increasing the current output frequency of the AC voltage to be applied to the load at a second slope smaller than the first slope.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: August 20, 2019
    Assignee: LSIS CO., LTD.
    Inventor: Chae-Bong Bae
  • Patent number: 10384559
    Abstract: A method includes selecting a link voltage based on voltage efficiencies of components in an electric drive motor system, and applying the link voltage to an inverter electrically coupled to a drive motor to increase system efficiency.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: August 20, 2019
    Assignee: GE GLOBAL SOURCING LLC
    Inventors: Jason Daniel Kuttenkuler, Henry Todd Young, Jeffrey John Wolff
  • Patent number: 10389285
    Abstract: A method of controlling an electric motor (motor) includes providing a processor having an associated memory storing a stator resistance (Rs) estimation (RSE) algorithm that is programmed to implement the RSE algorithm to execute steps including injecting a current waveform at an arbitrary frame of reference into the stator using a field-oriented-control (FOC) motor controller including an Id controller and an Iq controller, and measuring current and voltage values from the motor responsive to the injecting. The measured current and voltage values are then transformed into transformed current and voltage values in a d/q coordinate system. The transformed current and voltage values are low pass filtered to generate filtered d/q current and voltage values, and a value for Rs is estimated from the filtered d/q current and voltage values. The arbitrary frame of reference can be a time-varying frame of reference.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: August 20, 2019
    Assignee: Texas Instruments Incorporated
    Inventors: David Patrick Magee, Andre Veltman, Jorge Zambada
  • Patent number: 10378951
    Abstract: An improved system and method for analyzing motor performance to detect vibration of an electric machine controlled by a motor drive is disclosed. A load observer determines an estimated torque present as a load on the motor as a function of input signals corresponding to a desired torque to be generated by the motor and to a measured angular position of the motor during operation. The motor drive determines a frequency response of the estimated torque to identify at what magnitude and frequency any vibration components are present within the estimated torque signal. The motor drive compares the frequency response of the estimated torque signal to set points. If the measured magnitude of vibration at a particular frequency, as seen in the frequency response, exceeds a threshold set in one of the set points for that frequency, the motor drive generates an output signal indicating an excessive vibration is present.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: August 13, 2019
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Robert J. Miklosovic, Mark A. Chaffee
  • Patent number: 10374539
    Abstract: A driving device includes a motor, an inverter configured to drive the motor by switching a plurality of switching elements, and an electronic control unit configured to set voltage commands of phases according to temporary voltage commands of the phases based on a torque command of the motor and perform switching control of the switching elements by generating PWM signals for the switching elements by using the voltage commands of the phases and a carrier voltage. The electronic control unit is configured to switch a method of setting the voltage commands between a first method and a second method for each irregular time interval. The first method is a method of setting the voltage commands without superposing harmonics to the temporary voltage commands, and the second method is a method of setting the voltage commands by superposing the harmonics to the temporary voltage command.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: August 6, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Toshihiro Yamamoto, Kenji Yamada
  • Patent number: 10351002
    Abstract: An inverter control device that controls a rotary electric machine drive device that includes an inverter with a plurality of switching elements, where the active short circuit control is executed in a high rotational speed region, and the shut-down control is executed in a low rotational speed region, which is on a low rotational speed side with respect to the high rotational speed region, in accordance with at least a rotational speed of the rotary electric machine.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: July 16, 2019
    Assignee: AISIN AW CO., LTD.
    Inventors: Subrata Saha, Takashi Yoshida, Yuki Sugiyama, Yoichi Tajima, Masaya Kokubo
  • Patent number: 10333455
    Abstract: A system and method for speed regulation of a VFD circuit via an anti-windup control scheme that provides consistent speed response with no overshoot is disclosed. A control system for operating the VFD circuit includes a feedback controller programmed to receive a speed of a motor operating responsive to an initial torque command and process the speed of the motor to generate a feedback controller output. A feedforward controller of the control system is programmed to process a speed reference to generate a feedforward controller output. A command module of the control system is programmed to determine a torque command based on the processed outputs of the feedback and feedforward controllers and operate the VFD circuit to control the motor according to the torque command.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: June 25, 2019
    Assignee: Eaton Intelligent Power Limited
    Inventors: Xiaomeng Cheng, Huaqiang Li, Peijun Zhu, Dongxiao Wu, Kayle Wang, Qian Zhang
  • Patent number: 10284129
    Abstract: A system includes a three phase AC or brushless DC motor, an inverter and a controller. The inverter is electrically coupled to the motor. The controller is -electrically coupled to the inverter. The controller is configured to control the inverter to deliver a three phase pulse width modulated voltage to the AC motor, wherein the three phase pulse width modulation comprises a repeating two-cycle pattern.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: May 7, 2019
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventors: Sayeed Ahmed Mir, John David Neely, Stan Lawrence Seely, John Mendenhall White
  • Patent number: 10274939
    Abstract: Provided is a feed shaft control method, wherein a speed feedback loop having a speed controller is disposed within a position feedback loop having a position controller, forming a cascade coupling, and an acceleration feedback signal which is outputted from a compensator on the basis of an output signal of an acceleration detector is subtracted from a torque instruction. Furthermore, the method implements control wherein a speed is acquired on the basis of the output signal of the acceleration detector, and a signal obtained by multiplying the acquired speed by a gain is added to a speed instruction which is outputted from the position controller.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: April 30, 2019
    Assignee: MAKINO MILLING MACHINE CO., LTD.
    Inventor: Mitsunari Oda
  • Patent number: 10256760
    Abstract: A power conversion apparatus includes: a power converter that includes a plurality of switching elements; and a controller that controls the plurality of switching elements. The controller includes: a command generator that generates a voltage command vector; a synthesizer that synthesizes a correction vector with the voltage command vector to generate a synthetic vector; an adjuster that adjusts an output time of a plurality of voltage vectors from the power converter, the output time being corresponding to the synthetic vector; and a correction vector generator that generates the correction vector on the basis of an adjustment result of the adjuster.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: April 9, 2019
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Shingo Fukumaru, Shinya Morimoto, Hideaki Iura, Hirofumi Kinomura
  • Patent number: 10236688
    Abstract: An electrical power regulating apparatus includes a controller arranged to detect an electrical source characteristic of an electrical power source; and a power converter arranged to adjust an electrical load characteristic of an electrical loading stage in connection with the electrical power source based on the at least one electrical source characteristic being detected by the controller, such that the electrical power source is arranged to deliver a maximum amount of electrical power to the electrical loading stage. A method for regulating an electrical power circuit is also provided.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: March 19, 2019
    Assignee: CITY UNIVERSITY OF HONG KONG
    Inventors: Shu Hung Henry Chung, Hiu Kwan Tse
  • Patent number: 10222399
    Abstract: Methods and apparatus for electrical measurement are disclosed. An example electrical measurement device includes a conductive cable that includes a plurality of conductive filaments on a first end and an electrical connector on a second end, a cable mount that includes a base and an adjustable support attached to the base and the conductive cable to hold the plurality of conductive filaments in contact with a rotating element of a device under test during a measurement operation, with the conductive cable forming a portion of a circuit when the plurality of conductive filaments are in contact with the rotating element of the device under test and the electrical connector is in contact with an output.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: March 5, 2019
    Assignee: Illinois Tool Works Inc.
    Inventors: Jeffrey Richardson, Adam Willwerth
  • Patent number: 10218288
    Abstract: A power conversion circuit board (1) is a board on which a power conversion circuit which converts direct current to alternating current is mounted. A low voltage circuit (10b) to which a low voltage is applied and a high voltage circuit (10a) to which a high voltage is applied are separately disposed in different areas on the same board surface. Further, the high voltage circuit (10a) includes a bus bar in which a part of a wiring is formed on the board surface and another wiring is provided with a predetermined distance from the board surface.
    Type: Grant
    Filed: February 15, 2016
    Date of Patent: February 26, 2019
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Makoto Hattori, Hiroyuki Kamitani, Hiroto Higuchi
  • Patent number: 10199971
    Abstract: A motor controller includes a driver, a current detector, and a command generator. The driver is configured to drive a power converter based on a flux command on which an exploration signal is superimposed. The current detector is configured to detect an output current output from the power converter that has been driven by the driver. The command generator is configured to generate the flux command so as to reduce a current component, among current components included in the output current detected by the current detector, that corresponds to the exploration signal.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: February 5, 2019
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventor: Akira Yamazaki
  • Patent number: 10193487
    Abstract: There are provided a voltage command calculator that calculates a voltage command value that is a command value of an AC voltage to be applied to a rotary electric machine that is driven by a power conversion device, a carrier wave generator that generates a carrier wave, a comparator that generates a pulse signal to be supplied to the power conversion device on the basis of a comparison result between the voltage command value and the carrier wave, and a reset signal receiving unit that changes a value of the carrier wave into a predetermined value when a predetermined reset signal is input.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: January 29, 2019
    Assignee: Hitachi, Ltd.
    Inventors: Masatoshi Yoshimura, Mamoru Kimura, Noriaki Hino
  • Patent number: 10186953
    Abstract: A signal transmission circuit transmitting abnormality signals from a primary side circuit to a secondary side circuit is provided, in which the primary side circuit includes switching elements driven by drive circuits, the secondary circuit including a receiving unit receiving the abnormality signals transmitted from the primary side circuit. The signal transmission circuit includes: a plurality of isolation elements that electrically isolate the primary side circuit and the secondary side circuit, and allows the abnormality signals to be transmitted therethrough; and a logic circuit that receives the abnormality signals from the isolation elements, outputting a predetermined signal indicating an occurrence of an abnormality when at least one of the switching elements shows the abnormality.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: January 22, 2019
    Assignee: DENSO CORPORATION
    Inventors: Yosuke Asako, Tomotaka Suzuki
  • Patent number: 10181809
    Abstract: A rotating electric machine drive system includes a rotating electric machine and a drive apparatus. The rotating electric machine includes a Y-connected three-phase stator coil. The drive apparatus supplies electric current to the stator coil and thereby drives the rotating electric machine. In a predetermined low-torque region, the drive apparatus supplies the stator coil with the electric current which has a waveform obtained by superimposing a specific harmonic waveform on a first-order harmonic waveform. The specific harmonic waveform is one of third-order and (3+6n)th-order harmonic waveforms, or a harmonic waveform which is obtained by synthesizing at least two of the third-order and (3+6n)th-order harmonic waveforms, where n is a natural number not less than 1. The specific harmonic waveform takes a positive integral value for a positive half cycle of the first-order harmonic waveform and a negative integral value for a negative half cycle of the first-order harmonic waveform.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: January 15, 2019
    Assignee: DENSO CORPORATION
    Inventor: Yuki Takahashi
  • Patent number: 10177080
    Abstract: An intelligent power module (IPM) has a first, second, third and fourth die paddles, a first, second, third, fourth, fifth and sixth metal-oxide-semiconductor field-effect transistors (MOSFETs), a tie bar, an IC, a plurality of leads and a molding encapsulation. The first MOSFET is attached to the first die paddle. The second MOSFET is attached to the second die paddle. The third MOSFET is attached to the third die paddle. The fourth, fifth and sixth MOSFETs are attached to the fourth die paddle. The IC is attached to the tie bar. The molding encapsulation encloses the first, second, third and fourth die paddles, the first, second, third, fourth, fifth and sixth MOSFETs, the tie bar and the IC. The IPM is a small-outline package. It reduces system design time and improves reliability. The IC includes boost diodes. It reduces a package size of the IPM.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: January 8, 2019
    Assignee: ALPHA AND OMEGA SEMICONDUCTOR (CAYMAN) LTD.
    Inventors: Zhiqiang Niu, Bum-Seok Suh, Jun Lu, Wonjin Cho
  • Patent number: 10141865
    Abstract: The hybrid CHB-TVSI multilevel voltage source inverter is a polyphase grid-connected multilevel inverter system has an upper part and lower part that provides output power in three phases. The upper part uses cascaded H-bridge cells having pairs of switched intermediate outputs. DC power sources are connected in series or parallel to track a desired input voltage to feed respective H-bridges, providing an optimum power point tracking (MPPT) of the DC power sources. The lower part, also connected to DC power sources, uses a triple voltage source multilevel inverter that includes three cascaded units, each configured as a three-leg, two-level inverter. The lower part is connected to the upper part, the upper part providing a corresponding polyphase output.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: November 27, 2018
    Assignee: King Saud University
    Inventors: Abdullah Mohammed Ali Noman, Abdulraman Abdullah Alshammaa, Khaled Ebraheem Addoweesh, Ayman Abdullah Abdulaziz Alabduljabbar, Abdulrahman Ibrahim Alolah
  • Patent number: 10141864
    Abstract: A control circuit reduces switching loss by periodically stopping switching elements, and reduces the difference between the time for which positive switching elements are in on state and the time for which negative switching elements are in on state. The control circuit includes a command value signal generator generating command value signals Xu1, Xv1, and Xw1 from line voltage command value signals Xuv, Xvw, and Xwu, and includes a PWM signal generator generating PWM signals by the command value signals Xu1, Xv1, and Xw1. The command value signals Xu1, Xv1, and Xw1 are continuously at “0” for a predetermined period, and are continuously at “2” for another period. This enables reducing the difference between the period for which the PWM signals are low and the period for which they are high.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: November 27, 2018
    Assignee: DAUHEN Corporation
    Inventors: Nobuyuki Hattori, Akihiro Ohori, Hiroki Munechika