Brushless Motor Closed-loop Control Patents (Class 318/400.01)
  • Patent number: 10992243
    Abstract: A system and computer-implemented method for reducing an angle error in an estimated position of a rotor over various loads on an electric motor or type of electric motor. Electrical parameters of an electric motor are measured, a true rotor position is found, and sensorless gains based on the measured parameters are generated, including determining a sensorless angle. Data is gathered at multiple torque levels for at least one speed of the motor, including for each torque level, trying different inductance values, and determining an inductance value that results in an angle error of zero. The angle error is the difference between the true rotor position and the sensorless angle. The inductance value that results in an angle error of zero for each speed may be saved in an electronic memory and used to better control the motor or other motors of the same type.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: April 27, 2021
    Assignee: Nidec Motor Corporation
    Inventors: Bret S. Clark, Christopher D. Schock, Michael I. Henderson
  • Patent number: 10967954
    Abstract: One object is to reduce a volume occupied by a device disposed in a first space spatially limited to a large degree. An electric actuator diving and controlling device is provided with a drive unit positioned in a first space in a piece of equipment and configured to apply power to an electric actuator and a control unit positioned in a second space in the piece of equipment and configured to transmit, to the drive unit, a power command signal including information related to power to be applied to the electric actuator. The first space having the drive unit positioned therein is limited compared with the second space having the control unit positioned therein.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: April 6, 2021
    Assignee: NABTESCO CORPORATION
    Inventors: Shingo Nakagawa, Kazushige Nakajima, Takayuki Jinno
  • Patent number: 10948881
    Abstract: Timepiece movement fitted with an electromagnetic transducer comprising at least one coil and a rotor formed of a central shaft, of two magnetic plates that are mounted on the central shaft and of a plurality of bipolar magnets which are axially polarized and mounted on at least one of the two magnetic plates, said at least one coil penetrating at least partially into a circular space which is defined by the rotor between its two magnetic plates and left free by this rotor. The central shaft comprises a pinion which engages with a wheel of the timepiece movement, this pinion being arranged between the two magnetic plates and said wheel being partially arranged between the two magnetic plates, in an angular sector of the circular space that is left free by the electromagnetic transducer, so as to engage with the pinion. Advantageously, said wheel has a roller that is almost or entirely non-conductive and a non-magnetic staff.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: March 16, 2021
    Assignee: The Swatch Group Research and Development Ltd
    Inventors: Jean-Jacques Born, Yvan Ferri
  • Patent number: 10903776
    Abstract: An industrial electrical machine includes a stator; a rotor in magnetic communication with the stator; a plurality of windings disposed in the rotor and/or the stator; and an embedded solid state controller. The solid state controller is operative to control the operation of the industrial electrical machine. The solid state controller includes a power semiconductor switching device coupled to the plurality of windings, and includes a communication interface. The power semiconductor switching device is operative to provide switching during operation of the industrial electrical machine, and is operative to turn the electrical machine on and to turn the electrical machine off in response to a control input received by the communication interface.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: January 26, 2021
    Assignee: ABB Schweiz AG
    Inventors: Pietro Cairoli, Lorenzo Mazza, Zhiguo Pan
  • Patent number: 10890192
    Abstract: A fan comprising: (a) an impeller, (b) a motor connected to the impeller so that during operation the motor drives the impeller to move a fluid; (c) an instrumentation assembly that includes one or more components for controlling one or more operations of the fan; (d) an interface in communication with the instrumentation assembly; wherein the interface is configured so that one or more programs, one or more signals, or both can be input into the fan after a final assembly of the fan so that the fan can be configured to perform a desired function at the time of installation into a final product, reconfigured for a different purpose than originally programmed, or both.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: January 12, 2021
    Assignee: MDR ARCOM LLC
    Inventors: Fred A. Brown, Kenneth Hoffman
  • Patent number: 10889011
    Abstract: An actuator, a robot arm and a robot are disclosed. The actuator includes: a motor, including a housing, a motor stator and a motor rotor, wherein the motor stator is disposed to the housing, the motor rotor is rotatably connected to the housing, and the motor rotor covers the motor stator; a position encoder, disposed to the motor rotor; a reducer, connected to the motor rotor, and configured to adjust a rotation speed output from the motor rotor; and a motor driver, disposed on the housing, and electrically connected to the motor.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: January 12, 2021
    Assignee: INNFOS DRIVE (BEIJING) TECHNOLOGIES CO., LTD.
    Inventors: Haotian Cui, Xunge Yan
  • Patent number: 10833598
    Abstract: A power conversion device includes: a rectifying unit rectifying an AC voltage output from an AC power supply; a booster circuit boosting an output voltage of the rectifying unit; a control unit causing the booster circuit to perform synchronous rectification; and a smoothing capacitor smoothing an output voltage of the booster circuit. The booster circuit is constituted by connecting a plurality of chopper circuits in parallel to each other, the chopper circuits each including an upper arm switching element and a lower arm switching element connected in series to a reactor connected to the rectifying unit, and the control unit generates a drive pulse causing the upper arm switching element to be turned on when a reverse current flows through the upper arm switching element.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: November 10, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shigeo Umehara, Takuya Shimomugi, Takashi Yamakawa
  • Patent number: 10833612
    Abstract: An electric working machine includes an inverter and a controller. The controller switches a current conduction pattern via the inverter and performs a PWM control of a conduction current to a brushless motor. The controller includes switching patterns as the current conduction pattern switched for every commutation timing. The switching patterns include different on and off states for different switching elements. The controller sequentially switches a switching pattern synchronously with a period of the PWM control, detects a rotational position of a brushless motor from a magnitude relation between inductances of the brushless motor produced by switching the switching pattern, and sets the commutation timing.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: November 10, 2020
    Assignee: MAKITA CORPORATION
    Inventors: Masumi Nishimura, Yoshiteru Ito
  • Patent number: 10819257
    Abstract: Systems and methods for computing an average supply current to a motor include a current sensor that is configured to sense a current through the motor. A converter is configured to sample the output of the current sensor at times that are established by a trigger signal and convert the samples into digital current values. A trigger signal generator generates the trigger signal based on one or more pulse width modulated (PWM) motor control signals within a PWM cycle. An average supply current value that indicates the average supply current to the motor is computed by a controller using the digital current values received from the converter.
    Type: Grant
    Filed: September 5, 2019
    Date of Patent: October 27, 2020
    Assignee: Allegro MicroSystems, LLC
    Inventors: Kamyar Khosravi, Masahira Kurihara, Andrew Adib, Robert D. Christie
  • Patent number: 10812006
    Abstract: A motor drive device can include: a control circuit configured to adjust each phase current of a three-phase inverter of a motor; where the phase current of the three-phase inverter rises from zero to a first threshold during a first time interval; and where the phase current is controlled to drop gradually from the first threshold to zero during a second time interval in order to increase the second time interval.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: October 20, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Xiaodong Huang, Lei Shen
  • Patent number: 10784810
    Abstract: A motor control system for reducing or eliminating current ripple error during current sampling comprises a motor having a plurality of phase coils, a motor driver circuit having a plurality of switches coupled to the plurality of phase coils to drive current through the phase coils, and a motor controller circuit configured to provide a plurality of output control signals coupled to the plurality of switches. A phase circuit modifies a first output control signal to produce a modified control signal that is out of phase with a second output control signal. A current measuring circuit is included to measure a current through the motor by measuring the current during a first time period when the first output control signal is active and measuring the current during a second time period when the modified control signal is active.
    Type: Grant
    Filed: April 29, 2019
    Date of Patent: September 22, 2020
    Assignee: Allegro MicroSystems, LLC
    Inventor: Yisong Lu
  • Patent number: 10784798
    Abstract: A power converting apparatus and a home appliance having the same according to the present invention includes: an input unit including an AC connection unit which receives an alternating current (AC) power from an external and a DC connection unit which receives a direct current (DC) power; a bridge diode unit which always outputs the DC power having a given polarity when DC power is connected to the input unit, and rectifies the AC power received through the input unit when the DC power is connected to the input unit; and a capacitor which is connected to a DC terminal which is an output terminal of the bridge diode unit.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: September 22, 2020
    Assignee: LG ELECTONICS INC.
    Inventor: Youngho Hong
  • Patent number: 10734928
    Abstract: A signal conditioning apparatus includes a timing extractor to received one or more stepper motor drive signal and convert each into a corresponding virtual quadrature trigger signal. A resolution scaler is coupled to an output of the timing extractor to scale the virtual quadrature trigger signals to adjust the transition frequency, thereby adjusting the resolution of an image captured by a camera receiving the trigger signals to be different than the print resolution created by the motor drive signals. A quadrature decoder is coupled to the output of the resolution scaler, wherein the quadrature decoder extracts timing and direction information from the virtual quadrature trigger signals received from the resolution scaler.
    Type: Grant
    Filed: March 30, 2019
    Date of Patent: August 4, 2020
    Assignee: Omron Corporation
    Inventors: Siddharth Sood, Donald Broadbent, Jesse Kolstad, David Naddor
  • Patent number: 10734936
    Abstract: A motor control device includes: a noise reduction unit that sets a PWM count in units of PWM cycles for each PWM cycle in a current control cycle such that a current that flows through a frame ground because of a phase voltage for any one of three phases is canceled out with a current that flows through the frame ground because of a phase voltage for one of the two other phases in each PWM cycle in the current control cycle; and a noise canceling circuit configured to generate a current that is opposite in phase to a current that flows through the frame ground because of a phase voltage for the other of the two other phases in each PWM cycle in the current control cycle.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: August 4, 2020
    Assignee: JTEKT CORPORATION
    Inventors: Hiroshi Sumasu, Koichiro Matsuhisa
  • Patent number: 10727771
    Abstract: In order to shorten an activation time while realizing stable motor control, a motor control apparatus operable to control a motor is provided. The apparatus controls so as to drive the motor by the forced commutation control in a duration from a start of control of the motor until a first time period elapses, and control so as to drive the motor by the vector control after the first time period has elapsed. In addition, the apparatus controls an execution frequency of a current detection and a rotation speed estimation. The apparatus controls so that a first execution frequency in a second time period after a switch is made from driving by the forced commutation control to driving by the vector control is greater than a second execution frequency in a third time period subsequent to the second time period.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: July 28, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Koji Kawamura
  • Patent number: 10680500
    Abstract: A system and method for wirelessly communicating with an HVAC motor or other motor in order to manage the motor with regard to, e.g., identifying a suitable replacement for, programming, monitoring and/or diagnosing, and/or tuning or otherwise reprogramming the motor without physically connecting to the motor. A technician uses a software application on a smartphone, tablet, or other portable device to communicate with the motor controller via a wireless communication device incorporated into the motor assembly. The smartphone may receive relevant information, such as identification, programming, or diagnostic information, and process the information or wirelessly transmit the information to a server for processing. Based on the information, the smartphone may transmit programming instructions to the motor controller via the wireless communication device. Further, the wireless communication device may transmit sensor data associated with the motor to allow for monitoring the motor's performance.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: June 9, 2020
    Assignee: Nidec Motor Corporation
    Inventors: Prakash B. Shahi, Christopher D. Schock, Randy L. Bomkamp, Anandan C. Velayutham
  • Patent number: 10666182
    Abstract: A control system for a rotary electric machine includes a controller configured to generate dynamic input current data based upon a dynamic analysis of self flux data, mutual flux data, and saturation scaling factor data. Upon generating a torque request, the controller is configured to determine a desired electrical input based upon the dynamic input current data to generate the desired output torque. The desired electrical input includes a magnitude and duration of an electrical pulse and a desired angular position of the rotor of the rotary electric machine relative to the stator of the machine. The controller determines an angular position of the rotor and generates an operating command to generate the desired electrical input at the desired angular position of the rotor to propel the rotary electric machine and generate the desired output torque. A rotary electric machine and method of operating same are provided.
    Type: Grant
    Filed: April 6, 2018
    Date of Patent: May 26, 2020
    Assignee: Caterpillar Inc.
    Inventors: Carlos E. Nino Baron, Ahmed Khalil, Jackson Wai, Jesse R. Gerdes, Sangameshwar Sonth, Amir Saad
  • Patent number: 10637376
    Abstract: A device and a method for automatically detecting an initial position of a rotor of a motor are provided. The device includes an initial position detector, a lookup table module and a controller. The initial position detector detects input voltages of the motor. The controller compares the input voltages with each other to determine the initial position of the rotor of the motor. The controller obtains a waveform pattern from the lookup table module to construct an activating waveform signal to be outputted to one of steps of the motor that corresponds to the initial position of the rotor to control the motor to run.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: April 28, 2020
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventor: Ming-Jung Tsai
  • Patent number: 10615723
    Abstract: A multi-phase brushless DC motor driving circuit includes a driving-stage circuit, a PWM generator, a control circuit and a plurality of current detection circuits. The driving-stage circuit includes a plurality of sub-driving circuits each having a high-side transistor and a low-side transistor. The current detection circuits detect the current at a node between the high-side transistor and the low-side transistor of the corresponding sub-driving circuit, and then generate a current detection signal. According to the current detection signals, the control circuit controls the PWM generator to generate a plurality of PWM signals for controlling the conducting and cutting off of the high-side transistor and the low-side transistor of each sub-driving circuit, and to provide a driving current to drive a multi-phase brushless DC motor.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: April 7, 2020
    Assignee: ENERGIC TECHNOLOGIES CORP.
    Inventors: Chien-Ming Sun, Sheng-Hung Lin, Yi-Ting Ko
  • Patent number: 10581359
    Abstract: An output torque calculation device and a method thereof is provided, and the output torque calculation device includes a first sensor, a second sensor, a rotor, a reducer, a processor, and an elastic device. An input portion of the reducer and an output portion of the reducer are respectively connected to the rotor and an input portion of the elastic device, and an output portion of the elastic device is configured to connect to a load. The output torque calculation method comprises: detecting a first angle of the rotor by the first sensor; detecting a second angle of the output portion of the elastic device by the second sensor; and calculating a torque carried by a final output end of the output torque calculation device by the processor according to the first angle and the second angle.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: March 3, 2020
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Chun-An Lin, Hsi-Chih Chang, Hsin-Hung Chou, Wen-Che Shen, Kuan-Jung Lin
  • Patent number: 10530209
    Abstract: One example device includes a rotor platform that rotates about an axis of rotation. The device also includes a ring magnet mounted to the rotor platform to provide a rotor-platform magnetic field. The device also includes a stator platform that includes a planar mounting surface. The device also includes a plurality of conductive structures disposed along the planar mounting surface. The conductive structures remain within a predetermined distance to the ring magnet in response to rotation of the rotor platform about the axis of rotation. The conductive structures are electrically coupled to define an electrically conductive path that at least partially overlaps the ring magnet. The device also includes circuitry that causes an electrical current to flow through the conductive path. The electrical current generates a stator-platform magnetic field that interacts with the rotor-platform magnetic field such that the rotor platform rotates about the axis of rotation.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: January 7, 2020
    Assignee: Waymo LLC
    Inventors: Paul Karplus, Seth Michael LaForge
  • Patent number: 10523138
    Abstract: A motor control device includes: a state monitoring unit that detects a power supply abnormality in which a power is not normally supplied to at least one of a rotation sensor and a motor; an abnormality determination unit that detects an abnormality of the rotation sensor based on an output signal of the rotation sensor; and a decision unit that decides whether to confirm the abnormality of the rotation sensor based on a detection result of the state monitoring unit and a detection result of the abnormality determination unit. When the state monitoring unit detects the power supply abnormality, the decision unit does not decide the abnormality of the rotation sensor even when the abnormality determination unit detects the abnormality of the rotation sensor.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: December 31, 2019
    Assignee: DENSO CORPORATION
    Inventors: Hiromitsu Nagata, Seiji Nakayama, Jun Yamada
  • Patent number: 10511244
    Abstract: To improve identification precision of a motor constant that controls a motor by vector control. A parameter identifier sets an offset voltage of a DC component as a first d-axis target voltage, and detects a d-axis current that flows accordingly as an offset current. The parameter identifier also sets a voltage obtained by superimposing an identification signal of a predetermined AC component on the first d-axis target voltage as a second d-axis target voltage, and detects the d-axis current that flow accordingly. The parameter identifier then identifies the motor constant using a voltage obtained by subtracting the first d-axis target voltage from the second d-axis target voltage and a current obtained by subtracting the offset current from the d-axis current as inputs.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: December 17, 2019
    Assignee: Renesas Electronics Corporation
    Inventor: Takahito Ishino
  • Patent number: 10498277
    Abstract: A drive system of an embodiment includes an inverter for driving an electric motor; a detector that detects an electric current value output from the inverter; command generators that generate an electric current command value corresponding to an electric current to be supplied to the electric motor and a gate command of the inverter so that the electric current command value matches the electric current value; calculators that calculate an voltage target vector of the inverter and a rotation phase estimation value of the electric motor based on the electric current value and the voltage target vector, in an initial estimation of when activating the inverter. The electric current command value in the initial estimation is a value to supply an electric current for magnetically saturating a rotor of the electric motor, and a dynamic inductance of the electric motor used for calculating the rotation phase estimation value is a value of when the rotor of the electric motor is magnetically saturated.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: December 3, 2019
    Assignees: KABUSHIKI KAISHA TOSHIBA, Toshiba Infrastructure Systems & Solutions Corporation
    Inventors: Tomoaki Shigeta, Shun Taniguchi, Kentaro Suzuki, Kazuaki Yuuki
  • Patent number: 10467892
    Abstract: According to one aspect, a method includes obtaining a first signal from a host at an air mover system, the air mover system including an air mover and a tachometer, the tachometer having an associated tachometer signal. The method also includes determining whether the first signal is a request for information associated with the air mover, and providing the information from the air mover system to the host on the associated tachometer signal when it is determined that the first signal is the request for information associated with the air mover.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: November 5, 2019
    Assignee: Cisco Technology, Inc.
    Inventors: Niels-Peder Mosegard Jensen, Phong Hoang Ho, Robert Vincent Grimes
  • Patent number: 10447187
    Abstract: A control circuit controls the operation of a brushless DC (BLDC) sensorless motor having a first terminal connected to a first winding, a second terminal connected to a second winding and a third terminal connected to a third winding. A driver circuit applies drive signals to the first and second terminals and places the third terminal in a high-impedance state. The drive signals include first drive signals at a first current amplitude and second drive signals at a second, different, current amplitude. A differencing circuit senses a first mutual inductance voltage at the third terminal in response to the first drive signals and senses a second mutual inductance voltage at the third terminal in response to the second drive signals. The differencing circuit further determines a difference between the first and second mutual inductance voltages and produces a difference signal that is used for zero-crossing detection and rotor position sensing.
    Type: Grant
    Filed: February 1, 2018
    Date of Patent: October 15, 2019
    Assignee: STMicroelectronics S.r.l.
    Inventors: Michele Boscolo Berto, Siro Vittoni
  • Patent number: 10432128
    Abstract: A frequency converter is used for generating at least one frequency converter output voltage a prescribable frequency converter output voltage amplitude and a prescribable frequency converter output voltage frequency for an electric motor. The frequency converter has: a clocked DC/DC converter is designed to generate from an input direct voltage having an input voltage level a DC/DC converter output voltage having a DC/DC converter output voltage level, wherein the DC/DC converter is designed to generate the DC/DC converter output voltage level based on the prescribable frequency converter output voltage amplitude, and a clocked inverter having a number of controllable switches, to which inverter the DC/DC converter output voltage is applied and which actuates the switches with an inverter switching frequency such that the at least one frequency converter output voltage with the prescribable frequency converter output voltage frequency is generated from the DC/DC converter output voltage.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: October 1, 2019
    Assignee: Schmidhauser AG
    Inventor: Dirk Schekulin
  • Patent number: 10432115
    Abstract: A motor driving control apparatus in embodiments includes: a first signal generator to generate a first signal representing any one rotation angle section of plural rotation angle sections according to a sensor signal that changes every predetermined rotation angle of a rotor; a measurement unit to measure a period of each of the rotation angle sections; a prediction unit to predict a period of a next rotation section based on one or plural measured rotation angle sections; a second signal generator to generate a second signal representing a relative rotation angle of the rotor in the next rotation angle section for each period obtained by dividing the predicted period by a predetermined number; and a third signal generator to generate a third signal corresponding to a rotation angle of the rotor based on the first and second signals.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: October 1, 2019
    Assignees: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.
    Inventors: Masato Tanaka, Hiromi Hagiwara, Kazuo Asanuma, Hirokazu Shirakawa
  • Patent number: 10425033
    Abstract: It is an aspect of the present disclosure to provide a motor driving apparatus, and a method of controlling the same. In accordance with one aspect of the present disclosure, the motor driving apparatus includes an inverter configured to supply driving power to a motor; a sensing unit configured to sense a DC voltage supplied to the inverter and a driving current supplied from the inverter to the motor; and a controller configured to compensate for an iron loss and a copper loss by calculating a loss of the motor based on the sensed DC voltage and driving current and controlling the inverter to adjust the driving current based on the calculated loss of the motor.
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: September 24, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jong Hyun Shin, Sun Jin Kim, Jin Han Kim
  • Patent number: 10425024
    Abstract: A brushless motor device including: a rotor; a stator including a first coil, a second coil and a third coil, first ends of which are Y-connected to each other; a motor driver including an inverter circuit including switching elements and configured to: switch ON and OFF states of each switching element of the inverter circuit, wherein by switching the ON and OFF states of each switching element of the inverter circuit, the motor driver is configured to switch an energization time period from a first time period in which current is caused to flow from the first coil to the third coil to a second time period in which current is caused to flow from the second coil to the third coil and set both voltages of second ends of the second coil and the third coil to a power supply voltage during the second time period.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: September 24, 2019
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Hironori Hirata, Kohei Kanehara
  • Patent number: 10401197
    Abstract: An apparatus and method are provided for compensating for a position error of a resolver that compensates for positions in the overall speed range using resolver position error measured at a specific speed by providing an angle tracking observer (ATO) for calculating angle information. The ATO compensates for the position errors in the overall speed range based on the position errors measured at the specific speed, to an inside of a resolver-digital converter. The method includes digitalizing detected position information of the motor rotor and receiving the digitalized position information from a resolver-digital converter to measure the position error. An electrical angular velocity of the position error is determined and the position error at the electrical angular velocity 0 is calculated and stored. The position error at a current electrical angular velocity is converted into and compensated for using the calculated position error based on the current electrical angular velocity.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: September 3, 2019
    Assignee: Hyundai Motor Company
    Inventors: Joo Young Park, Han Hee Park, Tae Il Yoo, Byung Hoon Yang, Chin Wook Paek, Hyung Bin Ihm
  • Patent number: 10396702
    Abstract: A motor drive control device is a device which drives and controls a permanent magnet synchronous motor in which each phase is independently controlled, and includes a 0-axis current calculation unit which calculates and outputs a 0-axis current iz on the basis of a motor current; a 0-axis current determination unit which compares and determines a reference 0-axis current value izs, which is the 0-axis current value when the temperature of a permanent magnet provided in the permanent magnet synchronous motor is a reference temperature with the calculated 0-axis current iz; and a switching signal generation unit which drives and controls inverters on the basis of the result of comparison determination of the 0-axis current determination unit.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: August 27, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Katsuhiro Hoshino, Toshisada Mitsui, Seigo Yukutake, Hideki Miyazaki
  • Patent number: 10348235
    Abstract: A motor control unit includes a PWM count changer that when, out of all possible combinations of any two of three phases, at least one of the combinations has a difference in PWM count less than a threshold value, changes a PWM count of at least one of the two phases of the at least one of the combinations for each of PWM periods within a current control period, without changing the total of the PWM counts of the at least one of the two phases within the current control period, such that each of the combinations has a difference in PWM count greater than or equal to the threshold value.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: July 9, 2019
    Assignee: JTEKT CORPORATION
    Inventor: Hiroshi Sumasu
  • Patent number: 10326380
    Abstract: A motor drive apparatus includes: a converter which converts AC power to DC power and to output the DC power to a DC link; an inverter including power devices which converts the DC power to AC power for driving a motor; a capacitor provided in the DC link; a shut-off circuit to open and close an electrical path between the AC power source and the converter; a constant current control unit which performs control in such a manner as to allow a constant current supplied by the capacitor to pass through a detection target power device among the power devices in the inverter; and an abnormality detection unit which detects an abnormality in the detection target power device based on changes in voltage between a collector and an emitter of the detection target power device during a period in which the constant current passes through the detection target power device.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: June 18, 2019
    Assignee: FANUC CORPORATION
    Inventor: Shinichi Mizukami
  • Patent number: 10312827
    Abstract: A power conversion device that includes an inverter circuit in which arms are connected in parallel to each other between a DC positive terminal and a DC negative terminal in accordance with a number of phases of alternating currents of a plurality of phases, the arms for the respective phases each including two switch sections that are connected in series and to be brought into conduction in an on state and out of conduction in an off state, the power conversion device being configured to convert electric power between DC power and AC power of the plurality of phases while a connection point between the two switch sections of each of the arms is set as an AC input or output point of each phase.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: June 4, 2019
    Assignee: AISIN AW CO., LTD.
    Inventors: Subrata Saha, Arinori Shimada, Yutaka Hotta
  • Patent number: 10263499
    Abstract: A motor includes: a motor main body; a power board including a switching element and electrically connected to the motor main body; a control board electrically connected to the power board and disposed on an axial counter output side of the motor main body; a control board holder attached to the motor main body to hold the control board; a sensor magnet located on a counter output side of a stator and fixed to a shaft; a rotation sensor attached to the control board to face the sensor magnet; and a power board case directly or indirectly attached to the motor main body to hold the power board. The power board is positioned radially outward of the motor main body. Board surfaces of the power board are inclined with respect to board surfaces of the control board.
    Type: Grant
    Filed: October 17, 2015
    Date of Patent: April 16, 2019
    Assignee: NIDEC CORPORATION
    Inventor: Yoshiaki Yamashita
  • Patent number: 10259340
    Abstract: A system for a vehicle including an inverter electrically between a motor and traction battery, and a controller configured to operate the inverter at one of a predefined set of discrete frequencies selected according to rotor-torque-based probability weights corresponding to each of the discrete frequencies such that a probability that the inverter operates at the one changes as rotor torque changes.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: April 16, 2019
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Christopher Wolf, Michael W. Degner
  • Patent number: 10256756
    Abstract: In a brushless motor apparatus, a brushless motor has a rotor and Y-connected coils, and a controller has an inverter circuit selectively driving the coils. The controller detects an induced voltage generated in a specific coil which is not driven by the inverter circuit while the rotor rotates. The controller acquires a positional signal of the rotor on a basis of a timing at which the induced voltage reaches the reference value. The timing is obtained through comparison between the detected induced voltage and a reference value. The controller switches a coil driven by the inverter circuit on a basis of the positional signal, and sets a mask period on a basis of a result of comparison between voltage of the specific coil and a coil other than the specific coil. The comparison between the induced voltage and the reference value is not executed in the mask period.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: April 9, 2019
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventor: Hironori Hirata
  • Patent number: 10230316
    Abstract: A motor driving device for brushless direct current motors and an application apparatus thereof are provided. The motor driving device includes an inverter, a plurality of motor branches, and a microprocessor. The inverter includes a plurality of semiconductor switches to output an alternating current power via a first output terminal and a second output terminal. The plurality of motor branches are connected in parallel between the first output terminal and the second output terminal of the inverter, and each of the plurality of motor branches comprising a motor and a controllable bidirectional alternating current switch connected in series. The microprocessor controls a conduction manner of the semiconductor switches in the inverter, and whether to turn of the controllable bidirectional alternating current switch in each of the plurality of motor branches.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: March 12, 2019
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Yue Li, Chiping Sun, Fei Xin, Shinghin Yeung, Xiuwen Yang, Shujuan Huang
  • Patent number: 10196150
    Abstract: A motor assembly that includes a motor (102) having a rotatable shaft, a hub coupled to the rotatable shaft, the hub having a propeller indexer to receive a propeller (104), when the propeller is present, a sensor trigger rotatable with the shaft (100) and positioned at a propeller offset angle ?PROP from the propeller indexer, and a sensor coupled to the motor and positioned to detect the sensor trigger so that the propeller indexer may be positioned at the propeller offset angle ?PROP from the sensor through rotation of the shaft so that said sensor is proximate to the sensor trigger.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: February 5, 2019
    Assignee: AEROVIRONMENT, INC.
    Inventors: Jason Allen Firanski, Justin Bates McAllister, Ronald Howard Olch, Lane Dennis Dalan, Emil Ghapgharan
  • Patent number: 10177694
    Abstract: In a current sensor abnormality diagnosis device, an abnormality judgment section determines that the phase current sensors are operating normally when a sum of three phase currents is not more than a threshold value, and a bus current sensor is operating normally based on a comparison result between three phase currents and a bus current. The abnormality judgment section detects which the phase current sensor has failed based on the three phase currents and the bus current when the sum of the three phase currents is more than the threshold value. Because of using the comparison results of the three phase currents with the bus current in addition to the sum of the three phase currents, it is possible for the abnormality judgment section to detect the occurrence of abnormality of each of these current sensors even if the detected current has an undefined value.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: January 8, 2019
    Assignee: DENSO CORPORATION
    Inventors: Atsuko Oka, Shuji Kuramitsu, Koichi Nakamura
  • Patent number: 10153715
    Abstract: A motor driving control device includes: a motor driving unit for selectively energizing coils of a plurality of phases of a motor; a control circuit unit for outputting a driving control signal to the motor driving unit to control an operation of the motor driving unit; and a position detector corresponding to one phase out of the plurality of phases, the position detector outputting a position signal having a phase varying according to a position of a rotor of the motor, wherein when starting activation of the motor, the control circuit unit executes first control for causing the motor to perform short-circuit braking, and second control for starting a first lock operation in which the rotor is locked by energizing coils of a predetermined energization phase out of the plurality of phases with a first current value after the first control is executed, and when executing the first control, the control unit performs the short-circuit braking from the start of the short-circuit braking of the motor until varia
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: December 11, 2018
    Assignee: MINEBEA MITSUMI INC.
    Inventor: Masato Aoki
  • Patent number: 10131332
    Abstract: A controller for a brake may comprise a tangible, non-transitory memory configured to communicate with the controller, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by the controller, cause the controller to perform operations comprising receiving, by the controller, a three-phase signal indicating a first duty cycle for a first phase signal, a second duty cycle for a second phase signal, and a third duty cycle for a third phase signal, determining, by the controller, a minimum value based upon the first phase signal, the second phase signal, and the third phase signal, and converting, by the controller, the minimum value to a zero value.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: November 20, 2018
    Assignee: Goodrich Corporation
    Inventors: Naison E Mastrocola, Scott R Durkee
  • Patent number: 10135382
    Abstract: A motor control device calculates a velocity difference based on a velocity command and a velocity detection value of a motor and an excitation current common phase voltage difference based on an excitation current command value and an excitation current detection value, and judges that demagnetization occurs when the following conditions are all met: the excitation current common phase voltage difference exceeds a voltage threshold; the velocity difference exceeds a velocity threshold; and acceleration is being performed.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: November 20, 2018
    Assignee: OKUMA CORPORATION
    Inventors: Tomohiro Shibata, Yoshimaro Hanaki
  • Patent number: 10116245
    Abstract: A compressor driving device includes: a controller that PWM drives a compressor; an inverter circuit unit that supplies power to an electric motor included in the compressor; a drive circuit that drives the inverter circuit unit according to a control signal; a voltage detector that detects a voltage that is output to the electric motor; and a current detector that detects a current that is output to the electric motor. When a product of a detection value of the voltage detector and a detection value of the current detector is greater than a predetermined comparison value, a duty ratio of the control signal is reduced to cause the input power supplied to the electric motor by the inverter circuit unit to have a predetermined input power level or less.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: October 30, 2018
    Assignee: PANASONIC APPLIANCES REFRIGERATION DEVICES SINGAPORE
    Inventors: Mitsuhiro Fukuda, Masaki Sumi, Hiroaki Kase, Shigetomi Tokunaga, Masamitsu Taura, Takayuki Okamoto
  • Patent number: 10103675
    Abstract: A control device includes a gate-signal generating unit that outputs a gate signal to an inverter circuit and a voltage-vector generating unit that generates a voltage command to the gate-signal generating unit on the basis of a torque command PTR from an upper unit, rotating speed FM of an alternating-current electric motor, and a direct-current voltage value EFC applied to the inverter circuit. The voltage-vector generating unit calculates, on basis of a modulation rate, which is a ratio of the direct-current voltage value EFC and a voltage amplitude command in the voltage command, a PWM current distortion rate serving as an index representing a degree of a current harmonic caused by PWM control, generates the voltage amplitude command value on the basis of the calculated PWM current distortion rate, and outputs the voltage amplitude command value to the gate-signal generating unit.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: October 16, 2018
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Ryo Yokozutsumi, Hisanori Yamasaki, Sho Kato, Haruyuki Kometani, Kenta Kaneko
  • Patent number: 10084406
    Abstract: Exemplary embodiments or implementations are disclosed of methods, apparatus, and systems for operating motors in variable speed situations. In an exemplary implementation, a method of controlling a variable-speed motor includes defining a control duration as a predetermined number of cycles of a multiple-phase power supply. Each speed in a range of speeds is defined by a corresponding number of the cycles of the control duration. Power is provided to the motor from the power supply at a selected one of the speeds, by enabling input from the power supply for the number of the cycles of the control duration corresponding to the selected speed.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: September 25, 2018
    Assignee: Emerson Electric Co.
    Inventors: Ping Shan, Cai Bing Zhang
  • Patent number: 10042011
    Abstract: A method to detect a decrease of the demagnetization of permanent magnets of the generator of a wind turbine, wherein a frequency converter is able to adapt to the variable frequency of the generator output voltage to the frequency of a power grid, wherein the AC/DC converter or the DC/AC converter of the frequency converter is been disabled, the electrical connections between the generator and the frequency converter are switched on via circuit breakers, the generator speed is determined; the generator output voltage is determined by a voltage sensor which is part of the frequency converter, the magnetic flux density of the generator is calculated depending on the generator speed and the generator output voltage, a demagnetization event is determined by comparing the resulting flux density value with a predetermined flux density value is provided.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: August 7, 2018
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Heng Deng
  • Patent number: 10033320
    Abstract: A method and apparatus for controlling the motor of a synchronous reluctance motor for a pump, in particular a centrifugal pump, are provided. The motor includes a variable-frequency drive which controls the synchronous reluctance motor in a terminal volts/hertz operation. The pump, in particular a centrifugal pump, includes at least one synchronous reluctance motor and a variable-frequency drive for a motor control, the variable-frequency drive being a terminal volts/hertz variable-frequency drive.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: July 24, 2018
    Assignee: KSB Aktiengesellschaft
    Inventors: Daniel Gontermann, Jochen Schaab
  • Patent number: 10018202
    Abstract: A fan control system includes a control module, a first fan module and a second fan module. The control module provides a first control signal to the first fan module to adjust the rotation state of the first fan module. The first fan module provides a second control signal to the second fan module based on the first control signal to adjust the second fan module. The first fan module includes a first terminal and a second terminal. The second fan module includes a first terminal and a second terminal. The first terminal of the first fan module is electrically connected to the control module to receive the first control signal. The second terminal of the first fan module is electrically connected to the first terminal of the second fan module. The second terminal of the second fan module is electrically connected to a reference voltage.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: July 10, 2018
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Ching-Feng Lai, Yin-Kai Chen