Including Inverter Patents (Class 318/801)
  • 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 10141249
    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: September 8, 2017
    Date of Patent: November 27, 2018
    Assignee: ALPHA AND OMEGA SEMICONDUCTOR (CAYMAN) LTD.
    Inventors: Zhiqiang Niu, Bum-Seok Suh, Wonjin Cho, Jun Lu
  • 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
  • Patent number: 10122175
    Abstract: For voltage angle control, a control module generates a control signal for a grid. A canceling function generates an output voltage angle as a function of the control signal that regulates the grid. The output voltage signal includes an angular canceling function that cancels an angular control portion of a dynamic response of the grid such that the control signal controls the grid as a second-order quadrant-axis current.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: November 6, 2018
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Zhendong Zhang, Ahmed S. Mohamed Sayed Ahmed
  • Patent number: 10090789
    Abstract: To provide a motor control device capable of causing a motor to rotate in any rotation direction, even when leaving the connection state of the motor of a machine tool as standard.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: October 2, 2018
    Assignee: FANUC CORPORATION
    Inventors: Tadashi Okita, Yuuki Morita, Daisuke Tajima
  • Patent number: 10077925
    Abstract: A refrigeration apparatus includes a compressor, first and second heat exchangers, first and second electric valves, a passage-switching valve, a supercooling heat exchanger, and a controller. The first and second valves are disposed in first and second refrigerant passages. The supercooling heat exchanger conducts heat exchange between refrigerant flowing through the first and second refrigerant passages. The controller transitions to a defrosting operation mode upon determining that frost has formed on the second heat exchanger during a heating operation mode. The controller executes a defrosting preparatory control and a defrosting control after the defrosting preparatory control during the defrosting operation mode. The controller switches the passage-switching valve during the defrosting control. The controller narrows the opening degree of the first electric valve and controls the opening degree of the second electric valve to a minimum opening degree during the defrosting preparatory control.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: September 18, 2018
    Assignee: Daikin Industries, Ltd.
    Inventor: Naoto Horiuchi
  • Patent number: 10044299
    Abstract: A motor driving device includes: an inverter control unit configured to generate and output a control signal for feedback-controlling a motor using a control command value for setting driving of the motor and a feedback value including a current value of driving power supplied to the motor; an inverter configured to supply driving power to the motor in accordance with the control signal output from the inverter control unit; and an abnormality detecting unit configured to detect an abnormality of the inverter. The abnormality detecting unit determines that the inverter is abnormal when a sum of three-phase AC voltage values of the driving power supplied to the motor is greater than a predetermined voltage value and a difference between the control command value supplied to the inverter control unit and the feedback value is less than a predetermined value.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: August 7, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yu Sasaki, Hiroyuki Iyama
  • Patent number: 10020761
    Abstract: An embedded controller in a vehicle electronics subsystem includes a signal processing circuit used to communicate with an electric machine. The signal processing circuit may be configured to receive an input signal from the electric machine and provide digital output signals to the embedded controller. The digital output signals may include Hall position and rotor position signals. Once the digital output signals are processed by a processor embedded within the controller, the processor may issue a control command to the electric machine. The processor may have memory containing software to make the processor execute the computation of the control command of the electric machine in accordance with a torque command.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: July 10, 2018
    Assignee: Ford Global Technologies, LLC
    Inventors: Chang-Jiang Wang, Michael W. Degner, William Reynolds
  • Patent number: 10017076
    Abstract: A motor control apparatus for a vehicle includes a data detector detecting driving data and a vehicle controller controlling a drive motor according to the driving data. The vehicle controller includes an acceleration generator determining a request torque and a request speed using the driving data and generating a request acceleration using the request torque and the request speed; a driving point determinator selecting an inductance control current map or a motor efficiency control current map according to the request acceleration and determining a current driving point according to the request torque and the request speed using the selected current map; and a motor controller controlling the drive motor using the current driving point.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: July 10, 2018
    Assignee: HYUNDAI MOTOR COMPANY
    Inventors: SangHwa Do, Sangjin Park, Young Jin Seo, Kyoungbum Kim
  • Patent number: 10011178
    Abstract: An electrified vehicle propulsion system uses current feedback to modify gate drive signals to suppress voltage spikes and increase switching efficiency. A DC link having a link capacitor and a link inductance is connected to first and second converters. A first converter bridge has a first phase leg with first upper and lower switching devices, each switching device having a respective gate loop. A second converter bridge has a second phase leg with second upper and lower switching devices, each switching device having a respective gate loop. A plurality of gate drivers provide gate drive signals to respective gate loops for turning the respective switching devices on and off. A plurality of gate coils are provided, wherein each gate coil is connected in series between a respective gate driver and a respective gate loop. Each gate coil is respectively inductively coupled to the link inductance.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: July 3, 2018
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Zhuxian Xu, Chingchi Chen
  • Patent number: 9994111
    Abstract: A method for performing a jump starting operation or a remote charging operation of a recipient vehicle. A current path from an inverter to an electric drive of the donor vehicle is disconnected. For the jump starting operation, the inverter of the donor vehicle is connected on the output side to the electric drive of the recipient vehicle and the inverter of the donor vehicle is operated in the virtual driving operation mode and the electric drive of the recipient vehicle is started. During the remote charging operation, the inverter of the donor vehicle is connected on the output side to the inverter of the recipient vehicle and is operated in the virtual driving operation mode, while the inverter of the recipient vehicle is operated in the virtual recuperation operation mode and charges the discharged battery of the recipient vehicle.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: June 12, 2018
    Assignee: Robert Bosch GmbH
    Inventors: Holger Stegmueller, Roger Flattich
  • Patent number: 9989287
    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: September 17, 2015
    Date of Patent: June 5, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Gwinan Hwang, Junhyo Koo, Sanghyun Song, Inguk Lee, Taehwan Hwang
  • Patent number: 9991780
    Abstract: A power management device includes a first power unit, a second power unit, and a control unit. The first power unit receives a first control signal of a first phase to generate a first current of the first phase flowing to an output node. The second power unit receives a second control signal of a second phase to generate a second current of the second phase flowing to the output node. A phase delay is the difference between the first phase and the second phase. The control unit receives a clock signal in a clock frequency to generate the first control signal and the second control signal. The control unit controls the phase delay to cancel a corresponding harmonic of the clock frequency at the output node.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: June 5, 2018
    Assignee: MEDIATEK INC.
    Inventors: Jhe-Jia Kuo, Fu-Yi Han
  • Patent number: 9985569
    Abstract: A three-phase rotating machine controller includes electric power converters that output, to the winding sets of a three-phase rotating machine, alternating currents having a same amplitude and a phase difference of (30 ±60*n) degrees from each other, n being an integer, and a control unit that reduces a peak of a phase current 1st order component applied to the rotating machine by superimposing therewith a phase current 5th order component and a phase current 7th order component, which have 5 times and 7 times the frequency of the phase current 1st order component, respectively. The control unit superimposes the phase current 5th and 7th order components having an optimum combination of amplitudes such that a peak reduction amount of the phase current 1st order component exceeds 5%, the amplitudes of the phase current 5th and 7th order components being with respect to the amplitude of the phase current 1st order component.
    Type: Grant
    Filed: April 19, 2016
    Date of Patent: May 29, 2018
    Assignee: DENSO CORPORATION
    Inventor: Takashi Suzuki
  • Patent number: 9985566
    Abstract: A system and/or method for controlling a dual-three-phase machine with respect to a power electronics inverter is provided. The dual-three-phase machine includes six phase windings divided into at least two windings groups configured to provide a combination of six voltages that achieve zero common-mode voltage and a significantly reduced common-mode noise current.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: May 29, 2018
    Assignee: OTIS ELEVATOR COMPANY
    Inventor: Dong Jiang
  • Patent number: 9954433
    Abstract: Power supply and drive device for a permanent magnet motor including a full-wave voltage rectifier stage, which can be supplied with an alternating current voltage to provide a rectified voltage, a power factor corrector stage, a smoothing capacitor to provide a direct current voltage and a motor drive stage, which is supplied with the direct current voltage and provides a signal indicating the power required by the motor. The smoothing capacitor is not of the electrolytic type and the power factor corrector stage has feedback control means to generate a reference current as a function of the direct current voltage and of the signal indicating the power required and to control an input current of the power factor corrector stage as a function of the reference current.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: April 24, 2018
    Assignee: Phase Motion Control S.p.A.
    Inventors: Marco Venturini, Marco Calvini
  • Patent number: 9954467
    Abstract: Provided is a motor control device controlling several motors independently. The motor control device includes a plurality of inverters supplying power to each of several motors, respectively, and a control CPU provided with a command generator generating a control command, a PI controller that generates a torque command and a speed command by performing a proportional integral operation using feedback information and the control command transmitted from the command generator, and a vector controller that generates a PWM control signal using the torque command and the speed command and supplies the generated PWM signal to the plurality of inverters, in which the command generator includes an input translator that converts the command input as a QMCL command into the control command.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: April 24, 2018
    Assignee: HANSA Co., Ltd.
    Inventors: Yong-Gil Kwon, Takamitsu Ishii
  • Patent number: 9948224
    Abstract: A system and method for position sensorless control of an AC electric machine is disclosed. A drive system for driving an AC electric machine provides a primary current excitation to drive the AC electric machine, the primary current excitation comprising a current vector having a magnitude and angle. The drive system injects a carrier signal to the AC electric machine that is superimposed onto the current vector, with the carrier signal being selected to generate a carrier response signal that has sensitivity to magnetic alignment information of the AC electric machine at its operating point. The drive system measures at least one magnetic alignment signature of the AC electric machine from the generated carrier response signal and controls an orientation of the current vector using the measured at least one magnetic alignment signature, so as to achieve a desired magnetic operation of the AC electric machine.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: April 17, 2018
    Assignee: General Electric Company
    Inventors: Kum-Kang Huh, Di Pan
  • Patent number: 9919615
    Abstract: Circuits, methods, and systems for driving a load are described. An exemplary driving circuit may include a plurality of switching devices and a controller electrically connected to the switching devices. The controller may be configured to receive a reference voltage signal indicating a target voltage for the driving circuit to generate to drive the load. The reference voltage signal may correspond to a reference space vector in a reference frame. The controller may also be configured to determine that the reference space vector falls within a holding region in which the reference voltage signal is subject to over-modulation. The controller may then generate an adjusted reference voltage signal by adjusting the reference space vector to match a predetermined space vector associated with the holding region. In addition, the controller may be configured to provide the adjusted reference voltage signal to the plurality of switching devices to drive the load.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: March 20, 2018
    Assignee: FARADAY & FUTURE INC.
    Inventors: Stefan Grubic, Mengwei Campbell