Patents Examined by Jorge L Carrasquillo
  • Patent number: 11159115
    Abstract: A motor driving device that drives a motor with an alternating-current power converted from a direct-current power supply, includes an inverter that receives a pulse-width modulation signal and supplies the alternating-current power to the motor, and an inverter control unit that generates the pulse-width modulation signal and supplies the pulse-width modulation signal to the inverter. The inverter control unit reduces the number of pulses of the pulse-width modulation signal generated during a first period within one period of a mechanical angle of the motor to be lower than the number of pulses of the pulse-width modulation signal generated during a second period within the one period of the mechanical angle of the motor. The first period is a period during which a load torque is lower than a load torque during the second period.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: October 26, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koichi Arisawa, Kazunori Hatakeyama, Keisuke Uemura
  • Patent number: 11159117
    Abstract: A power source system includes: a rotary electrical machine; a power source; a switch that is provided between the power source and the rotary electrical machine; and a power source control device that controls opening/closing of the switch in response to a request for power feeding to the rotary electrical machine. The power source control device is configured to, in response to the power source system stopping operation, bring the switch into a closed state in a predetermined period of time. A rotary electrical machine control device controlling the rotary electrical machine includes: a determination unit that, in response to the power source system stopping operation, determines that the switch is in the closed state; and an abnormality diagnosis unit that, in response to the determination unit determining that the switch is in the closed state, performs an abnormality diagnosis of the rotary electrical machine.
    Type: Grant
    Filed: October 28, 2019
    Date of Patent: October 26, 2021
    Assignee: DENSO CORPORATION
    Inventor: Kenji Inokuma
  • Patent number: 11128247
    Abstract: An inverter-converter system includes a DC source, a DC to DC boost converter, a DC link capacitor, an inverter circuit, a variable speed electric machine, and a controller. The DC to DC boost converter receives an input DC voltage from the DC source. The inverter circuit converts the variable boosted voltage to an AC voltage to drive the variable speed electric machine. The controller senses a plurality of parameters from the variable speed electric machine, and controls the DC to DC boost converter to boost up the input DC voltage to a variable output voltage based on the plurality of parameters and/or the voltage (or load) needed by the variable speed electric machine. The design of the inverter-converter system can achieve an electrical efficiency and cost savings for the overall system.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: September 21, 2021
    Assignee: Thermo King Corporation
    Inventors: Ryan Wayne Schumacher, Marcelo Andrade Dias
  • Patent number: 11121658
    Abstract: A parameter concerning rotation of a motor is estimated (first estimation). A parameter concerning rotation of the motor is estimated, based on a model representing a prescribed change in a rotation speed of the motor (second estimation). It is determined whether an anomaly has occurred in the rotation of the motor, based on the parameter estimated in the first estimation and the parameter estimated in the second estimation.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: September 14, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Jumpei Ashida
  • Patent number: 11121617
    Abstract: Disclosed are a driver IC circuit of an intelligent power module, an intelligent power module and an air conditioner. The driver IC circuit includes: an operating voltage input end, an inverter logic buffer circuit, an upper bridge driver circuit, a lower bridge driver circuit, a PFC logic buffer circuit, a PFC driver circuit, a first voltage regulation control input end, a second voltage regulation control input end, a first voltage regulation module and a second voltage regulation module. The first voltage regulation module increases or decreases the operating voltage according to the first voltage regulation control signal; the second voltage regulation module increase or decreases the operating voltage according to the second voltage regulation control signal; or output the operating voltage to the PFC logic buffer input circuit and the PFC driver circuit. The problem that existing driver IC circuits cannot directly drive SiC-based power switching devices can be solved.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: September 14, 2021
    Assignees: GD MIDEA AIR-CONDITIONING EQUIPMENT CO., LTD., MIDEA GROUP CO., LTD.
    Inventors: Yesheng Li, Yuxiang Feng
  • Patent number: 11114959
    Abstract: In a so-called dual power source and dual inverter system, in which a pair of first and second inverters controls and drives a motor that includes multiple windings of phases each having open ends based on electric power supplied from a pair of power supplies, a motor driving system capable of appropriately allocating the electric power supplied from the pair of power supplies to the pair of inverters is provided. The motor driving system includes a pair of first and second inverter control circuits to generate a pair of first and second voltage instructions supplied to the first and second inverters based on a torque command, respectively. One of the first and second inverter control circuits includes a power controller that controls sharing of the electric power supplied from the first and second power supplies in accordance with a target electric power instruction.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: September 7, 2021
    Assignees: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Haruka Oka, Ryuji Omata, Kiyotaka Matsubara, Makoto Nakamura, Daigo Nobe
  • Patent number: 11104376
    Abstract: A power supply current control device including: a current limit value calculation unit configured to calculate a current limit value on a basis of a difference between a power supply voltage and a predetermined set voltage, a power supply current, and a resistance model representing a resistance component of the power supply circuit; a power supply current limit unit configured to limit a magnitude of the power supply current on a basis of the current limit value; a change rate limit value calculation unit configured to calculate a change rate limit value on a basis of the difference and a change speed of the power supply voltage; and a power supply current change rate limit unit configured to limit a change rate of the power supply current on a basis of the change rate limit value.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: August 31, 2021
    Assignee: NSK LTD.
    Inventor: Yasutoshi Miki
  • Patent number: 11095245
    Abstract: An apparatus for controlling an inverter to drive a motor includes: a current control processor generating a voltage command for generating d/q axis current detection values, which are obtained by measuring current supplied to the motor, to follow a d/q axis current command for driving the motor, the current control processor converting the voltage command, which is sampled according to a sampling frequency generated based on a voltage vector phase of the voltage command, into a voltage vector corresponding to a point on each vertex and each side of a hexagon in a voltage vector diagram to apply a resulting value to the inverter driving the motor; and a sample frequency computing processor computing the sampling frequency based on the voltage vector phase of the voltage command and a reference number of sampling times during one rotation period of the motor.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: August 17, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Yong Jae Lee, Mu Shin Kwak, Joo Young Park, Jae Ho Hwang, Ho Joon Shin, Sung Kyu Kim, Su Hyun Bae
  • Patent number: 11070186
    Abstract: The invention relates to an electronic filter (100), intended to filter the supply power for electrical equipment, notably placed inside a motor vehicle, comprising: a busbar (10) intended to exchange electrical energy between an electrical power supply source and an electric machine, the busbar (10) comprising: at least one leadframe (12, 14) intended to transmit an electrical current between an electrical network and the electric machine, the at least one leadframe (12, 14) being partly overmolded with electrically insulating material, and an inductor (18) electrically connected to the at least one leadframe (12, 14), characterized in that the electronic filter (100) comprises: an electronic board (30) comprising at least one capacitor (32a-32h), the at least one capacitor (32a-32h) of the electronic board (30) being electrically connected to a connection terminal (24, 26) of the at least one leadframe (14, 12) of the busbar (10).
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: July 20, 2021
    Assignee: Valeo Systemes de Controle Moteur
    Inventors: Rudy Duchon, Philippe Mercier
  • Patent number: 11056987
    Abstract: A motor system provided with one motor and two inverters includes a first inverter control unit which changes a frequency of a first carrier wave (first carrier frequency) used for producing a switching signal fora first inverter according to an operating point of the motor; and a second inverter control unit which changes a frequency of a second carrier wave (second carrier frequency) used for producing a switching signal for a second inverter according to an operating point of the motor. The first carrier frequency has a changing characteristic depending on the first inverter control unit and the second carrier frequency has a changing characteristic depending on the second inverter control unit, and the changing characteristics are different from each other to make the first carrier frequency and the second carrier frequency differ from each other at an identical operating point.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: July 6, 2021
    Assignee: Denso Corporation
    Inventors: Kiyotaka Matsubara, Makoto Nakamura, Daigo Nobe, Ryuji Omata
  • Patent number: 11048236
    Abstract: The determination of a slip constant is simplified upon driving a motor for which the slip constant is unknown, based on variation of acceleration when accelerating an induction motor from start up to a predetermined speed. A parameter determination support device for motor driving includes: an automatic measurement part which automatically measures characteristic information including a speed during acceleration and acceleration upon driving an induction motor to accelerate from start up to a predetermined speed set in advance which is no more than a base speed of the induction motor, relative to each slip constant, based on a plurality of slip constants set in advance; and an estimation part which estimates, as a slip constant of the induction motor, a slip constant having the smallest variation in acceleration, among a plurality of slip constants, based on the characteristic information.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: June 29, 2021
    Assignee: FANUC CORPORATION
    Inventors: Kouki Oikawa, Yuuki Morita, Tadashi Okita
  • Patent number: 11050367
    Abstract: A long-life motor driving device is realized. A motor driving device (11) includes: a motor driving circuit (3) configured to supply an alternating electric current to a motor (2); and a dynamic braking circuit (4). The dynamic braking circuit includes: a mechanical switch (SW2) configured to cause a short circuit between windings corresponding to respective two phases; a semiconductor switch (SW1) connected to the mechanical switch in parallel and configured to cause a short circuit between the windings corresponding to the respective two phases; and a first impedance circuit (Z1) connected to the semiconductor switch in series.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: June 29, 2021
    Assignee: OMRON CORPORATION
    Inventor: Shengpei Wang
  • Patent number: 11050368
    Abstract: Disclosed is an apparatus for controlling a rotation speed of a motor, a motor and a food processing equipment. The apparatus includes: a rotation speed feedback circuit and a rotation speed control loop; the rotation speed feedback circuit comprises a rotation speed inducing unit configured to induce a current rotation speed of the motor and output a rotation speed detection signal, and a resistance adjusting unit configured to adjust a total resistance of a resistor unit of the rotation speed control loop according to the rotation speed detection signal; the rotation speed control loop comprises the resistor unit, a first capacitor, a first controllable switch and a second controllable switch.
    Type: Grant
    Filed: January 25, 2019
    Date of Patent: June 29, 2021
    Assignee: SHENZHEN H&T INTELLIGENT CONTROL CO., LTD.
    Inventors: Jingfeng Zhu, Linlin Pi, Gang Zhou
  • Patent number: 11038446
    Abstract: A motor driving circuit includes a plurality of pins, a Hall sensor, a Hall signal processing portion and a driving processing circuit. The test-starting pin for receiving the test-starting signal and the test signal output pin for outputting the test signal are shared with at least one pin of the plurality of pins. The Hall sensor senses the change in the magnetic field of the motor to generate a Hall signal. The Hall signal processing unit amplifies the generated Hall signal, and the driving processing circuit drives the motor based on an output signal of the Hall signal processing unit and a control signal input from one of the plurality of pins. In a test mode, the output signal is output from the test signal output pin as a test signal. In a normal mode, at least one pin is used for normal operation.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: June 15, 2021
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Kun-Min Chen, Shen-Min Lo
  • Patent number: 11038457
    Abstract: A motor drive includes a rectifier bridge, which rectifier bridge is connected to an DC link, which is connected to an inverter bridge having phase outputs configured to be connected to an elevator motor, as well as a drive control controlling the semiconductor switches of the inverter bridge. The inverter bridge has upper semiconductor switches of the upper side connected to plus of the DC link and lower semiconductor switches of the lower side connected to minus of the DC link, the upper semiconductor switches are semiconductor switches without desaturation- and/or over-current protection whereas the lower semiconductor switches comprise a desaturation- and/or over-current protection, or vice versa.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: June 15, 2021
    Assignee: KONE CORPORATION
    Inventors: Olli Pokkinen, Arto Nakari
  • Patent number: 11025182
    Abstract: A signal processing apparatus includes a processor, a memory storing a program, and an integration circuit that performs filter processing on an input signal to output a processed signal. The processor samples an output signal output from the integration circuit in a sampling period Ts and stores a sampled value of the output signal in accordance with the program, and detects a duty of the input signal based on a difference between a value of the output signal at a time t0 representing a present time point and a sampled value of the output signal obtained at a time t0?n representing an earlier time than the time t0 by an n sampling period when n is a positive integer, the value of the output signal, a value of the integer n, the sampling period Ts, and a time constant of a filter of the integration circuit.
    Type: Grant
    Filed: October 31, 2019
    Date of Patent: June 1, 2021
    Assignee: NIDEC CORPORATION
    Inventor: Hideyuki Takemoto
  • Patent number: 10975619
    Abstract: Methods and apparatus to control architectural opening covering assemblies are disclosed herein. An architectural covering assembly including an architectural covering; a tube to which the architectural covering is coupled; a manual controller operatively coupled to the tube to rotate the tube; a motor including a motor housing and a motor shaft; and a clutch assembly including a clutch and a clutch housing in which the clutch is disposed, the motor shaft coupled to the clutch and the clutch coupled to the manual controller to hold the motor shaft substantially stationary when the architectural covering is moved under an influence of the motor to cause the motor housing to rotate with the clutch housing and the tube.
    Type: Grant
    Filed: April 8, 2019
    Date of Patent: April 13, 2021
    Assignee: Hunter Douglas Inc.
    Inventors: Wendell B. Colson, Daniel M. Fogarty, Paul G. Swiszcz, Kevin M. Dann, William Johnson, Jörg Bohlen
  • Patent number: 10972025
    Abstract: A DC electric motor having a stator mounted to a substrate, the stator having a coil assembly having a magnetic core, a rotor mounted to the stator with permanent magnets distributed radially about the rotor, the permanent magnets extending beyond the magnetic core, and sensors mounted to the substrate adjacent the permanent magnets. During operation of the motor passage of the permanent magnets over the sensors produces a substantially sinusoidal signal of varying voltage substantially without noise and/or saturation, allowing an angular position of the rotor relative the substrate to be determined from linear portions of the sinusoidal signal without requiring use of an encoder or position sensors and without requiring noise-reduction or filtering of the signal.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: April 6, 2021
    Assignee: Cepheid
    Inventors: Tien Phan, Doug Dority
  • Patent number: 10967816
    Abstract: An apparatus having an electrical generator and an energy transfer device coupled to the generator. The energy transfer device has a first capacitor having a capacitance of at least 1 Farad and storing at least 1 MegaJoule of energy, a high-energy inductor coupled to the first capacitor, a second capacitor having capacitance of at least 100 Farads, a switch coupling the second capacitor to the first capacitor and configured to store energy from the first capacitor in the second capacitor through the inductor when in a closed state. The apparatus further has an energy transfer controller controlling an open or closed state of the switch, and an electrical motor coupled to the energy transfer device and a mechanical drive system.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: April 6, 2021
    Assignee: Richard H. Sherratt and Susan B. Sherratt Revocable Trust Fund
    Inventor: Brian Elfman
  • Patent number: 10965226
    Abstract: A power conversion apparatus and a power conversion system that ensure safety capable of reliably performing an emergency stop and have a failure monitoring function are provided. The command signal for emergency stop of the power conversion apparatus between the supervisory monitoring and control device and the power conversion apparatus is to be a dual system, and the supervisory monitoring and control device monitors a performance of emergency stop of the power conversion apparatus by delaying the start of operation for a predetermined time from the operation command signal output. The supervisory monitoring and control device check a soundness of the power conversion apparatus by generating a test operation signal during that delay period.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: March 30, 2021
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventor: Hiromitsu Suzuki