Patents Examined by Jorge L Carrasquillo
  • 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
  • Patent number: 10958202
    Abstract: A rotary electric machine is equipped with a stator and a rotor. The rotor has a d-axis magnetic circuit that is produced by a magnetomotive force of a field winding, and magnet magnetic circuits that are produced by a magnetic force of permanent magnets. The d-axis magnetic circuit and a q-axis magnetic circuit have at least a part thereof that is common to both. The permeance of the d-axis magnetic circuit is smaller than the permeance of the q-axis magnetic circuit, when a load is being applied to the rotor. A control apparatus of the rotary electric machine has a switching circuit that controls the field current in the field winding, and a control section that makes the switching frequency of the switching circuit become higher when the field current is above a threshold value than when the field current is less than or equal to the threshold value.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: March 23, 2021
    Assignee: DENSO CORPORATION
    Inventors: Makoto Taniguchi, Yuuki Takahashi
  • Patent number: 10951111
    Abstract: An apparatus includes an inverter configured to be connected to a load, a driver having an output coupled to control terminals of transistors of the inverter and a control input configured to receive control vectors and responsively apply control signals to control terminals of the inverter, a desaturation detector configured to detect desaturation of the transistors, and a controller coupled to the control input of the driver and configured to apply at least one test vector that causes the driver to turn on selected ones of the transistors for a duration sufficient for the desaturation detector to detect desaturation of at least one of the selected transistors and to enable or inhibit further operation of the inverter responsive to the desaturation detector. The load may be a motor and the controller may be configured to apply the at least one test vector responsive to a command to start the motor.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: March 16, 2021
    Inventors: Irving A. Gibbs, Gabriel Braga
  • Patent number: 10951155
    Abstract: A temperature prediction device includes an application voltage specifying unit which specifics a voltage value applied to an electromagnetic coil based on a distance from a distance detection unit provided in the electromagnetic coil to an output shaft, a coil current detection unit which detects a current value flowing when a voltage is applied to the electromagnetic coil on the basis of the voltage value specified by the application voltage specifying unit, and a coil temperature estimation unit which estimates a temperature of the electromagnetic coil on the basis of the voltage value specified by the application voltage specifying unit, the current value detected by the coil current detection unit, and a relational expression between the voltage value applied to the electromagnetic coil, the current value flowing when a voltage is applied to the electromagnet coil on the basis of the voltage value applied to the electromagnetic coil, and the temperature of the electromagnetic coil.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: March 16, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Yasunori Tokimasa, Yasushi Hasegawa
  • Patent number: 10944346
    Abstract: A device for estimating inductances of an electric machine having a salient-pole rotor is presented. The device comprises a processing system that controls stator voltages to constitute a balanced multi-phase alternating voltage when the rotor is stationary. The processing system estimates a position of the rotor based on a negative sequence component of stator currents. To estimate the quadrature-axis inductance, the processing system controls direct-axis current to be direct current and quadrature-axis voltage to be alternating voltage. The quadrature-axis inductance is estimated based on the quadrature-axis alternating voltage and on quadrature-axis alternating current. To estimate the direct-axis inductance, the processing system controls direct-axis voltage to be alternating voltage and the quadrature-axis voltage to be zero. The direct-axis inductance is estimated based on the direct-axis alternating voltage and on direct-axis alternating current.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: March 9, 2021
    Assignee: Vacon OY
    Inventor: Arto Sankala
  • Patent number: 10931219
    Abstract: Controllers for controlling hybrid motor drive circuits configured to drive a motor are provided herein. A controller is configured to drive the motor using an inverter when a motor commanded frequency is not within a predetermined range of line input power frequencies, and couple line input power to an output of the inverter using a first switch device when the motor commanded frequency is within the predetermined range of line input power frequencies.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: February 23, 2021
    Assignee: REGAL BELOIT AMERICA, INC.
    Inventors: Ludovic Andre Chretien, Roger Carlos Becerra, Kamron Mark Wright, Lester Benjamin Manz
  • Patent number: 10930445
    Abstract: A rotary operating device includes an operation part that is rotatable according to an operation by an operator, a rotation angle sensor that detects a rotation angle of the operation part, a torque applier that applies application torque to the operation part along a rotation direction of the operation part, a frictional force applier that applies a frictional force to the operation part, and a processor programmed to change the application torque and the frictional force according to the rotation angle.
    Type: Grant
    Filed: July 8, 2019
    Date of Patent: February 23, 2021
    Assignee: ALPS ALPINE CO., LTD.
    Inventors: I Ka, Hiroshi Wakuda, Takuya Abe
  • Patent number: 10924041
    Abstract: A motor drive system includes a converter configured to convert power between AC power in a power source and DC power in a DC link, an inverter for drive configured to convert power between the DC power and AC power in a servomotor for drive, a motor control unit for drive configured to control the servomotor for drive, a power storage device configured to store the DC power from the DC link or supplies the DC power to the DC link, and a determination unit configured to determine whether the holding energy of the power storage device is lower than a threshold for energy shortage determination, wherein when the holding energy is lower than the threshold for energy shortage determination, the motor control unit for drive controls the servomotor for drive by setting an additional standby period in which the servomotor for drive is inactive in a predetermined operation pattern.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: February 16, 2021
    Assignee: Fanuc Corporation
    Inventors: Shougo Shinoda, Satoshi Ikai
  • Patent number: 10924039
    Abstract: A motor control device for controlling a servomotor to axially move a movement target object includes: a speed detector for detecting the movement speed of the movement target object; an abnormality detector for detecting an abnormality of the speed detector; a motor controller for performing deceleration control on the servomotor to decelerate the movement target object, upon detection of the abnormality; a reference speed generator for generating a reference speed that decreases with passage of time, based on the movement speed when the movement target object decelerates and a predetermined deceleration; a speed monitor for monitoring the movement speed and determining whether or not the movement speed is equal to or greater than the reference speed; and a brake controller for actuating a brake for braking axial movement of the movement target object when the movement speed is determined to be equal to or greater than the reference speed.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: February 16, 2021
    Assignee: FANUC CORPORATION
    Inventors: Ryoutarou Tsuneki, Satoshi Ikai
  • Patent number: 10919394
    Abstract: The present disclosure relates to a power system including: a plurality of Electronic Control Units (ECUs) configured to transfer power to a motor connected to an output terminal; a temperature section determination unit configured to determine whether first temperature information input from a first temperature sensor which senses the temperature generated from a first ECU corresponds to a normal section, a warning section, or a danger section, which are set in advance; a temperature comparison determining unit configured to determine whether the first temperature information is less than or equal to second temperature information input from a second temperature sensor which senses the temperature generated from a second ECU, in a case in which it is determined that the first temperature information corresponds to the warning section; and a controller configured to control the first ECU so that the first ECU reduces the power in a case in which it is determined that the first temperature information is less
    Type: Grant
    Filed: February 1, 2018
    Date of Patent: February 16, 2021
    Assignee: MANDO CORPORATION
    Inventors: Ki Sub Keum, Seongjoo Kim
  • Patent number: 10897219
    Abstract: An electric power steering apparatus includes a motor, a controller including electrical components mounted on a substrate, and a connector unit including a cover that includes a first connector and a second connector, the first and second connectors connecting power and signals, in which each of the first connector and the second connector comprises a power supply part and a signal connection part, each of the power terminal and the signal terminal extend from the substrate in an axial direction of the motor, each of the power terminal and the signal terminal extend through the cover, each of the first connector and the second connector are arranged within a silhouette of the motor along the axial direction of the motor, each of the first connector and the second connector comprises an opening positioned on a side of the cover opposite the motor in the axial direction of the motor, the first connector and the second connector connect to and disconnect from the harness in a direction substantially parallel to
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: January 19, 2021
    Assignee: DENSO CORPORATION
    Inventor: Masashi Yamasaki
  • Patent number: 10879818
    Abstract: A linear actuator comprises a brushless DC motor (31), a driver circuit (51) for providing a multiphase voltage signal to the motor (31) and a controller (58) for detecting a rotor position and providing control signals to the driver circuit (51) in dependence thereof. Detector circuitry (61) detects a signal indicative of rotor speed. The controller (58) is configured to control the driver circuit (51) to drive the motor with a first waveform of the multiphase voltage signal, when the indicative signal indicates that the rotor speed does not exceed a predetermined speed; and control the driver circuit (51) to drive the motor with a second waveform of the multiphase voltage signal, when the indicative signal indicates that the rotor speed exceeds the predetermined speed, wherein the second waveform is selected to drive the motor (31) with an efficiency less than the efficiency when driven by the first waveform.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: December 29, 2020
    Assignee: LINAK A/S
    Inventor: Jeppe Christian Bastholm
  • Patent number: 10870355
    Abstract: This motor driving control apparatus has (A) an inverter unit configured to drive a motor; (B) a separation switch configured to separate a power source from the inverter unit; and (C) a controller configured to instruct the separation switch to separate the power source from the inverter unit and control the inverter unit to perform switching according to a speed and a braking target torque, upon detecting an event that braking should be performed without passing a regenerative current to the power source from the inverter unit. By introducing the separation switch that operates as described above, it becomes possible to perform control so as to consume the power by the motor itself without passing the regenerative current to the power source such as a battery.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: December 22, 2020
    Assignees: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.
    Inventors: Masato Tanaka, Yasuo Hosaka, Hiromi Hagiwara, Teruaki Kawahigashi, Yuto Kajiya, Taichi Yanaoka
  • Patent number: 10845565
    Abstract: Actuators for carrying and actuating a lens having a first optical axis, the lens receiving light folded from a second optical axis substantially perpendicular to the first optical axis, comprising first and second VCM engines coupled to the lens and first and second linear ball-guided rails operative to create movement of the lens in two substantially orthogonal directions upon actuation by respective VCM engines.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: November 24, 2020
    Assignee: Corephotonics Ltd.
    Inventors: Gil Bachar, Itay Yedid, Gal Shabtay, Ephraim Goldenberg, Gal Avivi, Itay Jerbi
  • Patent number: 10840843
    Abstract: A method of starting a sensorless BLDC motor. The method includes: providing a stator flux rotating coordinate system including a ds-axis and a qs-axis, selecting a voltage Vds on the ds-axis, allowing a voltage Vqs on the qs-axis to be 0, and resetting a to-be-started motor to a preset position; providing a flux ? to the motor, allowing the current Iqs on the qs-axis to rise, maintaining the flux constant, calculating a real-time torque T1 according to the torque/current closed loop on the qs-axis, comparing a preset starting torque T0 with the real-time torque T1, performing the torque/current closed-loop control until the real-time torque T1 reaches the preset starting torque T0; and continuously raising the real-time torque according to the torque/current closed loop to operate a load, measuring a real-time rotation speed V1, comparing a preset starting rotation speed V0 with the measured real-time rotation speed V1.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: November 17, 2020
    Assignee: ZHONGSHAN BROAD-OCEAN MOTOR CO., LTD.
    Inventor: Jizhong Wang
  • Patent number: 10840846
    Abstract: A motor control system includes a motor having an output line, motor control circuitry that includes DC bus lines and a smoothing capacitor between the DC bus lines and converts DC power supplied from outside the motor control circuitry into AC power and supply the AC power to the motor as driving power, and short circuit circuitry that, while the motor control circuitry is not supplying the driving power to the motor, makes a short circuit between the output line of the motor and a negative line of the DC bus lines of the motor control circuitry.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: November 17, 2020
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventor: Kunimasa Ando