Patents Examined by Thai T Dinh
  • Patent number: 11070157
    Abstract: An electric motor drive unit includes a winding switching unit that switches a configuration of windings of an electric motor, a winding switching instruction unit that generates an instruction signal for the winding switching unit, and a winding configuration retention unit to which the instruction signal generated by the winding switching instruction unit is input, and if the input instruction signal has a first value, outputs a signal corresponding to the input instruction signal to the winding switching unit, and if the input instruction signal has a second value different from the first value, continues outputting a signal that has been output to the winding switching unit before the reception of the second value, the first value indicating an instruction on the configuration of the windings.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: July 20, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Mitsuo Kashima, Keiichiro Shizu, Kazunori Hatakeyama
  • Patent number: 11063544
    Abstract: An inverter device includes: an inverter, a power supply current detection sensor, a phase current detection sensor, a three-phase voltage command calculator, and an inverter on/off signal generation unit. The phase current detection sensor detects a phase current in one phase of the inverter. The inverter on/off signal generation unit generates on/off signals based on the phase voltage commands. The three-phase voltage command calculator uses the power supply current and the phase current detected by the power supply current detection sensor and the phase current detection sensor, respectively, so as to calculate phase voltage commands directed to the inverter, and at a center time point of a period in which an upper arm switching element corresponding to one phase out of two phases for which the phase current detection sensor is not provided is on, and lower arm switching elements corresponding to the other two phases are on.
    Type: Grant
    Filed: July 4, 2017
    Date of Patent: July 13, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tatsuya Mori, Akira Furukawa, Isao Kezobo
  • Patent number: 11063535
    Abstract: This disclosure describes a method for shorting one or more windings in a steering motor. The method determines that a signal has not been received at a circuit from a processor. The method discharges a first capacitor in the circuit in response to the circuit not receiving the signal from the processor. The method turns on a first plurality of transistors via a resistor in response to discharging the first capacitor. The method turns on a second plurality of transistors in response to turning on the first plurality of transistors. The method sends a short circuit signal from the second plurality of transistors to a steering motor.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: July 13, 2021
    Assignee: Ford Global Technologies, LLC
    Inventors: Timothy Patrick Diez, Brian Rutkowski, David Rutkowski
  • Patent number: 11043912
    Abstract: A sensorless position estimation and control system and method for a permanent magnet electric motor of a powertrain system of a vehicle involve determining a reference torque to be achieved by the electric motor based on a set of vehicle operating parameters, determining a reference current magnitude to achieve the determined reference torque using a lookup table, determining current commands for the electric motor based on the determined reference current magnitude and a fixed reference current angle, injecting a high frequency voltage into a voltage control loop for the electric motor and estimating, by the controller, a position of a rotor of the electric motor thereafter, and controlling a current provided to the electric motor based on the determined current commands and the estimated rotor position.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: June 22, 2021
    Inventors: Daniel R Luedtke, Nitinkumar Patel, Mustafa Mohamadian, Lakshmi Narayanan Srivatchan
  • Patent number: 11043905
    Abstract: An AC-AC power convertor converts a first AC voltage to a second AC voltage. A PFC rectifier circuit rectifies an AC voltage (vG) so as to generate a rectified voltage. An inverter generates the second AC voltage from the rectified voltage. A controller controls the PFC rectifier circuit and the inverter such that power generated by the first AC voltage and the pulsations of power generated by the rectified voltage are output to an external device.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: June 22, 2021
    Assignee: NABTESCO CORPORATION
    Inventors: Yasuo Ono, Michael Haider, Dominik Bortis, Johann W. Kolar
  • Patent number: 11043913
    Abstract: A controller apparatus for an electric power tool is provided where the electric power tool includes a battery and a DC brushless motor. The controller apparatus includes a current detector that detects an instantaneous current flowing in the DC brushless motor; a current calculator that calculates one of an average value and an effective value of the instantaneous current detected by the current detector; a current controller configured to utilize a result from the current calculator as a detected value; and a speed controller configured to generate a target value of the current controller. The controller apparatus further includes a limiter that limits the target value of the current controller, where the limiter is provided at an output stage of the speed controller.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: June 22, 2021
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Fumiiki Yoneda
  • Patent number: 11038443
    Abstract: A motor control system includes a motor, and a motor control apparatus including first processing circuitry that, based on a driving state quantity of the motor, controls driving power supplied to the motor, safety request input receiving circuitry through which a safety request signal is input from outside the motor control apparatus, safety cooperation input receiving circuitry through which a safety cooperation signal is input from outside the motor control apparatus, safety cooperation output circuitry through which the motor control apparatus outputs the safety cooperation signal to outside the motor control apparatus, and second processing circuitry that, upon input of at least one signal among the safety request signal and the safety cooperation signal, monitors a relationship between a predetermined motion monitor pattern and the driving state quantity and outputs the safety cooperation signal.
    Type: Grant
    Filed: September 16, 2019
    Date of Patent: June 15, 2021
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventor: Kunimasa Ando
  • Patent number: 11031892
    Abstract: The present disclosure provides a brushless direct current (BLDC) motor overload detection apparatus. The BLDC motor overload detection apparatus includes a measurer for measuring a 3-phase current value applied to the BLDC motor to derive a sector value matched with the 3-phase current value, a determiner for determining whether the sector value is normal by comparing the sector value derived by the measurer with a previous sector value that is previously measured, and a driving controller for controlling driving of the BLDC motor according to whether the BLDC motor has a fault, determined by the determiner.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: June 8, 2021
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventor: Choong Seob Park
  • Patent number: 11018604
    Abstract: A conversion circuit board, including: a microprocessor module; a power module; a communication module; a first interface module; and a second interface module. The microprocessor module is adapted to communicate with a motherboard of an air conditioner via the communication module. The microprocessor module is adapted to connect to a first brushless direct current motor and a second brushless direct current motor via the first interface module and the second interface module, respectively. The power module supplies powers for the microprocessor module, the communication module, the first interface module, and the second interface module.
    Type: Grant
    Filed: July 4, 2019
    Date of Patent: May 25, 2021
    Assignee: ZHONGSHAN BROAD-OCEAN MOTOR CO., LTD.
    Inventors: Xiansheng Zhang, Yong Zhao, Meishuang Chen
  • Patent number: 11014456
    Abstract: A system and a method for reducing the acceleration shock of an electric motor vehicle are provided. A backlash torque range is determined based on a coast down value indicating the motor torque for maintaining a vehicle speed. A slope of the motor torque that falls within a backlash torque range is reduced and corrected, considering that the motor torque for causing backlash is changed as the motor speed changes, thereby reducing the shock due to the backlash at the acceleration (start-up) of a vehicle.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: May 25, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Hee Jin Lee, Hyo Jun Kwak
  • 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: 11012017
    Abstract: An embodiment relates to a method for operating a three-phase machine including a rotor and a stator connected to a three-phase network. The stator is connected to the three-phase network via a first semiconductor circuit arrangement for forming a first rotational field rotating in a first direction of rotation in the stator and via a second semiconductor circuit arrangement for forming a second rotational field rotating in a direction of rotation opposite to the first direction of rotation in the stator. The three-phase machine further includes a controller. The method includes controlling, via the controller, semiconductors of the first and second semiconductor circuit arrangement to accelerate the rotor by current pulses of both the first rotational field and second rotational field in the first direction of rotation.
    Type: Grant
    Filed: September 18, 2019
    Date of Patent: May 18, 2021
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Hauke Nannen, Heiko Zatocil
  • Patent number: 11005397
    Abstract: A method for detecting the angular position of an electric motor includes: applying a first drive signal with a first polarity between first and second drive terminals that are coupled to respective stator windings of the electric motor; sensing at a third drive terminal a first signal resulting from the application of the first drive signal; applying a second drive signal with a second polarity between the first and second drive terminals, the second polarity being opposite the first polarity; sensing at the third drive terminal a second signal resulting from the application of the second drive signal; and producing a sum signal by summing the first and second signals, wherein the sum signal is indicative of an angular position of a rotor of the electric motor with respect to the stator windings.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: May 11, 2021
    Assignee: STMicroelectronics S.r.l.
    Inventor: Michele Boscolo Berto
  • Patent number: 10992248
    Abstract: A motor device includes a stator unit including a plurality of first slots, a rotor unit rotatable relative to the stator unit, a winding unit, and a transfer switch unit. The winding unit includes first and second windings installed in the first slots. Number of poles of the first winding is less than that of the second winding. The transfer switch unit is electrically connected to the first and second windings, and is controlled to allocate access to electricity to each of the first and second windings.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: April 27, 2021
    Inventor: Feng-Tien Chen
  • Patent number: 10985683
    Abstract: An electric motor control device performing feedback control of a state amount of an electric motor or a load and being capable of changing a control bandwidth of a feedback control system includes: a notch filter arranged in the feedback control system and having a filter coefficient which is changeable; a notch control section which changes a notch frequency as a center frequency of the notch filter to remove an oscillation component attributable to mechanical resonance related to the electric motor; and a control coefficient setting section which changes at least one of the control bandwidth or the filter coefficient of the notch filter in accordance with the control bandwidth and the notch frequency to stabilize the feedback control system.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: April 20, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Hiroshi Fujiwara, Toru Tazawa, Fumitake Saegusa
  • Patent number: 10978980
    Abstract: A switched reluctance motor for an electric vehicle. The switched reluctance motor includes an inverter with switchable windings to control the inductance of the motor. The motor also includes a high speed and low speed mode corresponding to the inductance of the motor. The inverter may include parallel switches, selectively running current to the windings in order to control the inductance.
    Type: Grant
    Filed: July 8, 2019
    Date of Patent: April 13, 2021
    Assignee: KARMA AUTOMOTIVE LLC
    Inventors: Lixin Tang, Geng Niu
  • Patent number: 10978981
    Abstract: A drive apparatus for an electric motor includes an inverter, an inverter substrate, a wire connection switching unit, a control unit, and an alternating-current wire electrically connected at one end to the inverter and at the other end to one end of the windings of an electric motor. The drive apparatus for an electric motor includes an alternating-current wire electrically connected at one end to the alternating-current wires and electrically connected at the other end to one end of the wire connection switching unit, and an alternating-current wire electrically connected at one end to the other end of the wire connection switching unit and electrically connected at the other end to the other end of the windings of the electric motor. The drive apparatus for an electric motor includes a noise suppression unit provided at least on the alternating-current wires to suppress noise that occurs in the alternating-current wire.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: April 13, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuhei Shimada, Kazunori Hatakeyama
  • Patent number: 10978984
    Abstract: An electric vehicle includes drive systems, a control apparatus that controls the drive systems, and wheels. Each drive system includes a motor and an inverter coupled by wires. The wires of the drive systems are coupled by first bypass lines. Each inverter converts direct current power supplied from a corresponding power supply into alternating current power and supplies the alternating current power to the corresponding motor. Each motor drives the corresponding wheel. When an abnormality occurs in the supply of the alternating current power from the inverter to the motor in one drive system, the control apparatus performs control (i) to stop the supply of the alternating current power from the inverter of the one drive systems, and (ii) to supply the alternating current power supplied from the inverter to the motor in another drive system, to the motor of the one drive system via the first bypass lines.
    Type: Grant
    Filed: July 10, 2019
    Date of Patent: April 13, 2021
    Assignee: SUBARU CORPORATION
    Inventors: Shogo Yoshida, Naohiro Imamura, Misako Kuwahara, Takahito Fujino, Takahiro Akaba, Suguru Inoue
  • Patent number: 10978987
    Abstract: A motor drive device includes: an inverter circuit; a drive circuit which receives voltage supplied from a control power source; a first cutoff circuit which cuts off voltage supply from the control power source to the drive circuit; a second cutoff circuit connected between the first cutoff circuit and the drive circuit; a voltage detection circuit which detects a detection voltage corresponding to the voltage supplied from the control power source and which is capable of changing the detection voltage; a comparison circuit which, upon determination that the detection voltage is not within a predetermined range, cuts off the first cutoff circuit; and a diagnosis circuit which diagnoses the first cutoff circuit. The diagnosis circuit causes the comparison circuit to cut off the first cutoff circuit, diagnoses the first cutoff circuit, and upon diagnosing the operation of the first cutoff circuit as being abnormal, cuts off the second cutoff circuit.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: April 13, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Tomoya Hosokawa, Taro Kishibe, Yusuke Shimogaki
  • Patent number: 10969751
    Abstract: A method for determining parameters for controlling N electric generators at an instant t, the method including, for a required power Ptot(t)=?i=1NPi(t) at an instant t with Pi(t) the electric power supplied by the electric generator i at the instant t and a reserve power Preserve(t)??i=1N(Pimax?Pi(t)×?i(t) at an instant t with Pimax the maximum power that the electric generator i can develop and ?i(t) the coefficient of activation of the electric generator i which is equal to 1 when the electric generator is on and 0 when the electric generator is off, a step of determining the optimal power Piopt(t) at the instant t associated with each electric generator i so as to minimise the fuel consumption per unit of electrical energy produced sfc ? ( t ) = 1 P tot ? ( t ) ? ? i = 1 N ? f i ? ( P i ? ( t ) ) × P i ? ( t ) with fi(x) the function giving the fuel consumption of the electric generator i for the electric power x.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: April 6, 2021
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventor: Duy Long Ha