Constant Motor Current, Load And/or Torque Control Patents (Class 318/432)
  • Patent number: 10840840
    Abstract: A machine learning apparatus for learning a correction parameter used in correction of a command value that controls a motor in a motor drive system including a plurality of kinds of correction functions includes: a state observation unit that observes, as a state variable, each of a feature calculated on the basis of drive data and the kind of any of the correction functions of the motor drive system and the correction parameter; and a learning unit that learns the correction parameter for each of the correction functions according to a training data set created on the basis of the state variable.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: November 17, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Tomoya Fujita, Toshiaki Kimata, Tatsuya Ito, Yukihiro Iuchi, Goh Sato
  • Patent number: 10840847
    Abstract: A method of controlling an electric oil pump driven by a motor, may include changing, by a controller, a frequency of a current applied to the motor with a predetermined control cycle to control RPM of the motor to instantaneously change into a different value according to a frequency change.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: November 17, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corp
    Inventor: Byung Hwan Jung
  • Patent number: 10836371
    Abstract: A vehicle includes an engine, an electric machine selectively coupled to the engine, a traction battery, an electrical outlet, and first and second power inverters. The first power inverter is configured to transfer power between the traction battery and the electric machine. The second power inverter is configured to transfer power between the traction battery and the electrical outlet. A human-machine interface (HMI) has a selectable option indicative of a user's desire to use the electrical outlet at a next destination. A controller of the vehicle includes a processor and memory having stored therein a first battery state of charge (SOC) target and a second battery SOC target that is greater than the first SOC target. The controller is programmed to, in response to the selectable option being selected, switch from the first SOC target to the second SOC target and command charging of the traction battery responsive to a measured battery SOC being less than the second target.
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: November 17, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Harish Thiruvengadam, Erik J. Christen, Kevin James Rhodes, Chad Bednar
  • Patent number: 10823172
    Abstract: A method of operating a rolling piston rotary compressor includes obtaining an angular position and an angular speed of a rolling piston of the compressor, for example, using a tachometer or shaft encoder or observer. The method further includes obtaining an electromagnetic torque applied by an electric motor that is mechanically coupled to the rolling piston. The method further includes calculating a load torque exerted on the rolling piston based on these obtained values by using a load torque observer model that is formulated using known geometries of the compressor and thermodynamic models for the gas compression process. The operation of the electric motor is then adjusted such that the electromagnetic torque applied by the motor is equivalent to the calculated load torque such that noise and vibrations are minimized.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: November 3, 2020
    Assignee: Haier US Appliance Solutions, Inc.
    Inventors: Joseph Wilson Latham, Paul Goodjohn, Michael Lee McIntyre
  • Patent number: 10756665
    Abstract: A system and a method of isolating a fault in an electric motor system having a motor drive electronics (MDE) component that is configured to drive an electric motor with a plurality of phases, the MDE executing a method of isolating the fault that includes applying an excitation to a first phase and a second phase of the electric motor in a first direction and sensing a phase current value for each phase phases of the electric motor. The method also includes providing an excitation, for the first and second phase in an opposite direction of the first direction and measuring a phase current value for each phase. The applying, sensing, providing and measuring is repeated for every possible combination of phases of the electric motor. Finally, the method includes isolating the fault within the electric motor system based on the sensed and measured current values.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: August 25, 2020
    Assignee: HAMILTON SUNSTRAND CORPORATION
    Inventor: George C. Rannenberg
  • Patent number: 10756660
    Abstract: A motor drive having controller settings which will result in improved tuning-less performance is disclosed. Gain values for the control loops and/or observer are determined independently of the mechanical loading and the resultant effects of that loading on the motor. The motor drive includes a control loop operable to receive a command signal and to generate a controller reference signal to achieve desired operation of a motor connected to the motor drive. The motor drive also includes a load observer operable to generate a signal that estimates a response required by the motor drive as a result of a load present on the motor. The response estimate signal is provided to the controller to isolate the effects of the load dynamics from operation of the control loops within the controller. A modified controller reference signal is generated as a function of the response estimate signal and the controller reference signal.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: August 25, 2020
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Robert J. Miklosovic, Brian Fast, Mark Chaffee
  • Patent number: 10752283
    Abstract: Two sets of independent armature windings and two sets of control units are provided; a single power-source connector branches into at least four lines in the vicinity of a power-source terminal; a power source relay, a filter, and an inverter circuit are connected, in that order, with a line where a large current flows; a control circuit unit is connected with a line where a small current flows and a detection circuit for detecting an abnormality in the control circuit unit is provided in that line.
    Type: Grant
    Filed: September 5, 2016
    Date of Patent: August 25, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tomohiko Nagashima, Akihiko Mori
  • Patent number: 10756601
    Abstract: A control method of a motor rotation speed may include calculating a q-axis potential difference of a synchronous coordinate system for controlling a q-axis current of the synchronous coordinate system based on a target rotation speed of a motor and a measured rotation speed value of the speed sensor, calculating a voltage command of the synchronous coordinate system based on the calculated q-axis potential difference of the synchronous coordinate system, and controlling an inverter connected to the motor according to the calculated voltage command of the synchronous coordinate system.
    Type: Grant
    Filed: August 5, 2018
    Date of Patent: August 25, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Dong Hun Lee, Sung Do Kim, Chang Seok You, Min Su Kang, Soon Il Jeon
  • Patent number: 10747168
    Abstract: A control apparatus includes: a driving unit configured to drive a member into rotation; a detection unit configured to detect a torque exerted on the driving unit; and a control unit configured to control the driving unit and the member. The control unit is further configured to: when a state control of the member associated with a change of the torque exerted on the driving unit is performed, determine a change timing of the torque exerted on the driving unit and a value of the torque exerted on the driving unit at the change timing on a basis of a detection result of the detection unit; and determine a start timing of the state control of a case where the state control is again performed on the member on a basis of the change timing and the value of the torque.
    Type: Grant
    Filed: July 10, 2019
    Date of Patent: August 18, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Eijiro Ohashi, Masaru Tanaka
  • Patent number: 10737387
    Abstract: A robot arm calibration device is provided, which includes a light emitter, a light sensing module, a cooperative motion controller and a processing module. The light emitter is disposed on at least one robot arm to emit a light beam. The light sensing module is disposed on at least another robot arm to receive the light beam and the light beam is converted into a plurality of image data. The cooperative motion controller is configured to drive the light emitter and light sensing module on at least two robot arms to a corrected position and a position to be corrected, respectively. The processing module receives the image data and the motion parameters of the at least two robot arms to calculate an error value between the corrected position and the position to be corrected, and analyzes the image data to output a corrected motion parameter for modifying motion command.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: August 11, 2020
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Yan-Yi Du, Cheng-Chuan Chao, Shu Huang, Hung-Hsiu Yu
  • Patent number: 10730506
    Abstract: There is provided a hybrid vehicle including an electronic control unit configured to turn on a second inverter in three phases when an accelerator operation amount is equal to or greater than a predetermined operation amount during predetermined traveling in which the hybrid vehicle is traveling with the engine operated in a state in which a first inverter and a second inverter are shut down and when a rotation speed of a first motor is equal to or less than a predetermined rotation speed. Accordingly, it is possible to rapidly increase a rotation speed of the first motor to be higher than a predetermined rotation speed.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: August 4, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Yuka Inoshita
  • Patent number: 10723379
    Abstract: A system includes a computer programmed to specify, while a vehicle is turning, a feedback torque based on a steering torque applied to a steering rack and a difference between a desired angle and an actual angle of vehicle steerable wheels. The computer is further programmed to actuate feedback torque to a vehicle steering wheel.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: July 28, 2020
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Anand Pradip Naik, Darrel Alan Recker, Steven R. El Aile
  • Patent number: 10717138
    Abstract: A power tool includes a brushless motor, a rectifier circuit configured to rectify an AC voltage supplied from an AC power supply and output a rectified voltage, an inverter circuit configured to perform switching actions with respect to the rectified voltage to be supplied to the brushless motor, a controller configured to control the switching actions of the inverter circuit, a trigger having an operating part being operable by a user, a switch rendered ON and OFF in accordance with an operation performed in the operating part, wherein when the switch is ON, the inverter circuit is electrically connected to the AC power supply whereas when the switch is OFF, and the inverter circuit is electrically disconnected from the AC power supply, and a power supply circuit connected between the switch and the AC power supply and configured to supply a voltage to the controller.
    Type: Grant
    Filed: May 3, 2019
    Date of Patent: July 21, 2020
    Assignee: Koki Holdings Co., Ltd.
    Inventors: Takuya Yoshinari, Kazuhiko Funabashi, Toshiaki Koizumi
  • Patent number: 10675396
    Abstract: A method of detecting a suction condition during operation of a rotary blood pump with an inlet connected to a ventricle of the heart of a patient, an outlet connected to an artery of the patient, a rotor, and a control circuit configured maintain the rotor at a set rotational speed. The method includes measuring the rotational speed of the rotor at a plurality of times during each of a plurality of speed measurement intervals. A speed range is determined between a minimum measured speed and a maximum measured speed during each of the plurality of speed measurement intervals. At least one additional parameter relating to the operation of the blood pump is derived. A suction detection signal is generated if both at least one determined speed range is above a speed range limit and the at least one additional parameter is indicative of a suction condition.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: June 9, 2020
    Assignee: HeartWare, Inc.
    Inventors: Michael C. Brown, Neil Voskoboynikov
  • Patent number: 10670016
    Abstract: A monitoring apparatus comprises at least one sensor for measuring a current of the electric motor to generate a time-based signal and at least one electronic processor configured to transform the time-based signal into a frequency-based signal and to analyse the frequency-based signal to identify a signal pattern representing a pump fault condition. By monitoring the frequency-based signal, the monitoring apparatus can identify a pump fault condition.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: June 2, 2020
    Assignee: Edwards Limited
    Inventor: Laurent Marc Philippe
  • Patent number: 10668548
    Abstract: A device and associated system for threading, cutting, and reaming pipe ends. The device and system utilize a brushless DC electric motor. The devices also include on-board electronics and operator interface(s) to provide sophisticated control and information as to the various operations. Methods of operating the devices and several different modes for performing various operations.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: June 2, 2020
    Assignee: EMERSON ELECTRIC CO.
    Inventors: Richard M. Kundracik, Paul W. Gress, James E. Hamm, Glen R. Chartier
  • Patent number: 10663517
    Abstract: A control system for an electric motor comprises a current controller which produces a set of voltage demands for the motor, a current sensing means arranged to produce a current sensing output indicative of electric current in the motor, and a current signal processing means arranged to process the current sensing output signal to produce a modified current signal in which at least one harmonic component present in the current sensing output signal due to inaccuracies in the current measurement is removed or substantially reduced. The modified current signal is combined with a demanded motor current to provide the input to the current controller.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: May 26, 2020
    Assignee: TRW Limited
    Inventors: Christopher David Dixon, Peter Geoffrey Scotson
  • Patent number: 10644628
    Abstract: A motor drive device includes a power conversion unit configured to supply a drive current to a motor, a current detector configured to detect a current flowing from the power conversion unit into the motor, an A/D converter configured to convert the current detected by the current detector into digital data and outputs the digital data, a motor control unit configured to control the drive current supplied from the power conversion unit to the motor, using the digital data output from the A/D converter, and a sampling adjustment unit configured to adjust a sampling operation of the A/D converter performed for the current detected by the current detector, in accordance with the response time taken after the current detector detects the current until the A/D converter outputs the digital data of the current.
    Type: Grant
    Filed: November 8, 2018
    Date of Patent: May 5, 2020
    Assignee: FANUC CORPORATION
    Inventors: Masato Watanabe, Taku Sasaki
  • Patent number: 10644634
    Abstract: An electric power tool in one aspect of the disclosure comprises an operation unit, a bridge circuit having a plurality of switching elements, and a control unit. The control unit is configured to select from the plurality of switching elements a pair of switching elements forming a current path of a motor. The control unit selectively executes one of non-complementary PWM in which one of the selected switching elements is turned on and the other turned on/off, and complementary PWM in which, in addition to the same control as that of the non-complementary PWM, a switching element connected to the same terminal of the motor as the other of the selected switching elements is turned on/off so that an on/off state of the switching element is reversed to that of the other of the selected switching elements.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: May 5, 2020
    Assignee: MAKITA CORPORATION
    Inventor: Yoshitaka Ichikawa
  • Patent number: 10635118
    Abstract: The present disclosure relates to a method, a terminal device, and a computer readable storage medium for controlling rotation of a servo. The method includes: acquiring a loading mass and a rotation radius of the servo from a sensor electrically connected with the servo or by an externally input; calculating an angular acceleration threshold of the servo according to an angular acceleration formula, a rated torque, the loading mass, and the rotation radius of the servo; setting an angular acceleration of the servo according to the angular acceleration threshold; and rotating the servo according to the angular acceleration.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: April 28, 2020
    Assignee: UBTECH ROBOTICS CORP
    Inventors: Youjun Xiong, Wenhua Fan, Hanyu Sun, Zhongliang Wang
  • Patent number: 10637373
    Abstract: A system includes a rotary electric machine, wiring, a battery that is connected to the rotary electric machine by the wiring harness, and an upper limit value setting section which sets an output upper limit value that is an upper limit of an output command of the rotary electric machine. A control apparatus which controls the rotary electric machine is provided with a temperature acquisition section which acquires the temperature of at least one of the battery and the wiring, an allowable output value calculation section which calculates an allowable output value that is an upper limit allowed for an output command of the rotary electric machine, based on the temperature that is acquired by the temperature acquisition section, and a transmitting section which transmits the allowable output value calculated by the allowable value calculation section to the upper limit value setting section.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: April 28, 2020
    Assignee: DENSO CORPORATION
    Inventors: Shinsuke Kawazu, Akira Kato, Takashi Senda
  • Patent number: 10630222
    Abstract: A unique system may include a power absorber; an electrical machine coupled to the power absorber and operative to supply mechanical power to the power absorber; a drive coupled to the electrical machine and operative to supply electrical power to drive the electrical machine; and a controller communicatively coupled to the drive. The controller may be configured to execute program instructions to selectively vary a control voltage while maintaining a given torque output of the electrical machine, and to determine, based on varying the control voltage, a minimum current required for the electrical machine to maintain the given torque output.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: April 21, 2020
    Assignee: ABB Schweiz AG
    Inventors: Sara Ahmed, Zhiguo Pan, Hongrae Kim
  • Patent number: 10611406
    Abstract: A rotary position sensor senses rotation of a first member, having a first torque coupling surface, about an axis relative to a second member by sensing movement of a torque receiving component of the rotary. The isolator may include a mount, a linkage and a torsion spring. The linkage is to be coupled to the torque receiving component of the rotary sensor. The linkage has a second torque coupling surface separable from the first torque coupling surface by a play gap, wherein during rotation of the first member, the first torque coupling surface is to contact the second torque coupling surface to transmit torque to the linkage. The torsion spring is captured between the mount and the linkage independent of the torque receiving component to resiliently bias the second torque coupling surface through the play gap and into engagement with the first torque coupling surface.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: April 7, 2020
    Assignee: Deere & Company
    Inventor: James M. Hershbarger
  • Patent number: 10603770
    Abstract: A power tool and method of detecting impacts of a power tool that includes a motor driving a hammer to impact an anvil. A motor control unit is configured to determine a motor characteristic indicative of a speed of the motor. When the motor characteristic indicates that the speed of the motor is below a speed threshold, the motor control unit employs an acceleration-based technique to detect a first impact based on a change in motor acceleration and generate a first impact indication in response to detecting the first impact. When the motor characteristic indicates that the speed is above the speed threshold, the motor control unit employs a time-based technique to detect a second impact based on an elapsed time and generates a second impact indication in response to detecting the second impact.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: March 31, 2020
    Assignee: Milwaukee Electric Tool Corporation
    Inventors: Alex Huber, Matthew Wycklendt, Matthew Mergener, Cole Conrad, Wing Fung Yip
  • Patent number: 10599122
    Abstract: According to one aspect of the present invention, there is provided an electrically controllable rotary pressure device, comprising: a motor for providing torque to rotary pressure means; a power control unit for supplying power to the motor; a central processing unit for controlling the power control unit; and a rotational speed sensor for measuring a rotational speed of the motor or the rotary pressure means, wherein the central processing unit comprises an abnormality detection unit for receiving the rotational speed from the rotational speed sensor, and wherein the abnormality detection unit transmits a control signal to the central processing unit when abnormality in the rotational speed is detected, so that the central processing unit interrupts the power supply of the power control unit.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: March 24, 2020
    Assignee: RIMSCIENCE CO., LTD.
    Inventor: Sang Jin Yoon
  • Patent number: 10587215
    Abstract: A motor control unit includes a PWM count calculator, a PWM count setter, and a PWM count changer. The PWM count calculator calculates first PWM counts of phases. Each first PWM count is calculated for a current control period. The PWM count setter sets the first PWM count of each phase as a second PWM count of a corresponding phase. The second PWM count is set for each of PWM periods included in the current control period. The PWM count changer changes the second PWM count of at least one of the phases, without changing the total of the second PWM counts of the at least one phase within the current control period, such that the number of times switching elements corresponding to the at least one phase are switched within the current control period is reduced.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: March 10, 2020
    Assignee: JTEKT CORPORATION
    Inventor: Hiroshi Sumasu
  • Patent number: 10578522
    Abstract: The present invention provides a ventilation system for improving air quality of an indoor space. The system includes sensors for measuring PM2.5 particle level P, CO2 level C, and TVOC level T in the indoor space. A control circuit is configured to receive P, C and T values and generate an output signal Vout according to a specific algorithm, which in turn controls speed-variable EC motors that drive ventilating fans. The invention exhibits numerous technical merits such as lower energy consumption, programmable operation, high efficiency, and lower noise, among others.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: March 3, 2020
    Assignee: Hangzhou Long Beach Technology Co. Ltd.
    Inventors: Wei Zhang, Zhaofeng Chen
  • Patent number: 10571590
    Abstract: Current supplied to electrical submersible pumps in wells is monitored, and signal processing based on wavelet analysis and phase diagram analysis is performed on the data obtained from monitoring. An incipient malfunction of the electrical submersible pump, such as one due to scale build-up in and around the pump, can be detected at an early stage.
    Type: Grant
    Filed: July 8, 2019
    Date of Patent: February 25, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: Mohamed Nabil Noui-Mehidi, Ahmed Yasin Bukhamseen
  • Patent number: 10574172
    Abstract: A power conversion device may include a first inverter to which a first end of each phase winding is coupled; a second inverter to which a second end of each phase winding is coupled; a plurality of switching elements provided in the first and second inverters; a control circuit structured to perform n-phase conduction control on the first and second inverters; and a detection circuit structured to detect a failure in the switching elements. The control circuit is structured such that, when the detection circuit has detected a failure in any of the plurality of switching elements, the control circuit changes the control of the first and second inverters from the n-phase conduction control to m-phase conduction control using m phases of the n phases different from the phase of a winding coupled to the failed switching element, m being an integer not smaller than two and smaller than n.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: February 25, 2020
    Assignee: NIDEC CORPORATION
    Inventor: Eiji Wada
  • Patent number: 10566925
    Abstract: A motor control device of an electric motor includes: a board with a heat sink; multiple switching elements; a drive circuit IC; a control circuit IC; first and second temperature sensors; a temperature information processing unit; and an abnormality determination unit. An out-of-normal-range state is a state where a temperature deviation exceeds a normal deviation threshold, and it is impossible to determine which one of the first and second temperature sensors is abnormal. When both sensors are normal, the temperature information processing unit uses one of first and second detected temperatures. When one sensor is abnormal and the other is normal, the temperature information processing unit uses one of the first and second detected temperatures of a normal sensor. When both sensors fall in the out-of-normal-range state, the temperature information processing unit uses one of the first and second detected temperatures which meets a predetermined condition.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: February 18, 2020
    Assignee: DENSO CORPORATION
    Inventors: Haruo Suzuki, Hiroyasu Otake
  • Patent number: 10530288
    Abstract: A motor drive apparatus which drives a motor includes inverter modules equal in number to phases of the motor. Each of the inverter modules includes a plurality of switching element pairs. Each of the switching element pairs is defined by two switching elements connected in series. In each of the inverter modules, the plurality of switching element pairs are connected in parallel, and each of resistance values of gate resistors connected to the switching elements is set for the corresponding switching element connected thereto.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: January 7, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takuya Shimomugi, Yosuke Shinomoto, Katsuhiko Saito, Norikazu Ito
  • Patent number: 10521519
    Abstract: A rotor flux estimator is provided. The rotor flux estimator includes an estimation module that generates a first rotor flux vector expressed in a phase voltage reference frame and a second rotor flux vector expressed in the phase voltage reference frame, from a stator voltage vector expressed in a phase voltage reference frame, a rotational speed of a rotor, and a stator current vector expressed in the phase voltage reference frame. The estimation module includes at least one processor and the estimation module includes a rotor flux current model and a rotor flux voltage model.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: December 31, 2019
    Assignee: Atieva, Inc.
    Inventor: Yifan Tang
  • Patent number: 10505439
    Abstract: An inverter for an electric automobile having the following features: the inverter is configured to be connected at one end to a traction battery of the electric automobile and at the other end to a three-phase motor of the electric automobile; the inverter is configured to charge the traction battery if a star point of the three-phase motor is connected to a charging station; and the inverter comprises low-voltage-side switches for interrupting the charging if an operating limit of the inverter is exceeded. The invention furthermore provides a corresponding electric automobile.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: December 10, 2019
    Assignee: Dr. Ing. h.c. F. Porsche Aktiengesellschaft
    Inventors: Stefan Götz, Till Lütje
  • Patent number: 10498264
    Abstract: A torque monitoring system includes a rotatable measurement interface and a stationary data receiver. The measurement interface is configured to be attached to a rotatable shaft. The measurement interface includes a strain gauge, a processor, and a near field communication (NFC) transceiver coil. The stationary data receiver is stationary with respect to the rotating shaft. The stationary data receiver includes a processor and an NFC transceiver coil. The rotatable measurement interface receives operating power via its NFC transceiver coil that is derived from a radio signal wirelessly transmitted by the NFC transceiver coil in the stationary data receiver. The processor in the rotatable measurement interface is configured to receive strain gauge signals from the strain gauge indicative of torque on the rotatable shaft and wirelessly transmit digital data indicative of the strain gauge signals through the NFC transceiver coils to the processor in the stationary data receiver.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: December 3, 2019
    Assignee: LORD Corporation
    Inventors: Michael Hamel, Jeffrey Tonn, Daniel O'Neil
  • Patent number: 10471985
    Abstract: [Problem] An object of the present invention is to provide a motor control unit that improves a discontinuous feeling of an assist by flexibly making an adjustment of a current command value of a normal system when a failure occurs in any system of multi-system motor control, and enables smooth handling, and to provide an electric power steering apparatus and a vehicle equipped with the same.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: November 12, 2019
    Assignee: NSK LTD.
    Inventors: Kouichi Nampei, Yoshihiro Aosaki
  • Patent number: 10468999
    Abstract: Method for detecting load differences between at least one first electrical machine and at least one second electrical machine connected in parallel thereto, which are fed by an inverter, wherein the machines each are connected to the inverter via three supply lines and in two supply lines of the at least one first machine and in one of the supply lines of the at least one second machine, the currents are measured with the aid of current measuring sensors in the respective supply lines and, on the basis of the measured current values of the at least one first machine, the corresponding unmeasured currents of the at least one second machine are estimated, and the estimated total current of the supply lines of the at least one second machine is detected as a measure of deviation of the currents of the at least one second machine from the at least one first machine.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: November 5, 2019
    Assignee: BOMBARDIER TRANSPORTATION GMBH
    Inventors: Thomas Wolbank, Martin Bazant, Markus Vogelsberger
  • Patent number: 10439388
    Abstract: A fault detection method for a multi-phase motor system applies a first duty cycle to first phase coil windings and applies a second duty cycle to second phase coil windings. The second duty cycle differs from the first duty cycle by a first difference value D1. A first current I1 is measured. A third duty cycle is applied to third phase coil windings and a fourth duty cycle is applied to the second phase coil windings. The fourth duty cycle differs from the third duty cycle by a second difference value D2. A second current I2 is measured. Line-to-line resistances R1, R2 are calculated using the difference values D1, D2, the measured currents 11, I2, and a measured DC voltage VDC. After determining a resistance difference ?R between the line-to-line resistances R1, R2, a comparison to a first non-zero threshold T1 indicates a fault.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: October 8, 2019
    Assignee: Eaton Intelligent Power Limited
    Inventors: Bharath Kumar Suda, James David
  • Patent number: 10435896
    Abstract: An apparatus for lifting and sliding a structure to be attached to a wall of a building, including a lifting platform extending outwardly from the building, and a synchronous lifting and sliding system which is arranged on the lifting platform. The lifting platform has two platform beams extending outwardly from the building, and a lifting beam placed on the platform beams. The synchronous lifting and sliding system has a hydraulic lifter arranged on the lifting beam, a hydraulic jack connected to the lifting beam, and a controller. A connecting rod is connected to one end of the hydraulic jack, and several installing holes are arranged at regular intervals on the connecting rod. The distance between the adjacent installing holes of the connecting rod matches a stroke of the hydraulic jack. An installing ear-plate is provided on the platform beam to connect with the connecting rod.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: October 8, 2019
    Assignees: Guangzhou Construction Engineering Co., Ltd., Shanghai YeSheng Mechanical & Electrical Control Technology Co., LTD
    Inventors: Long Wang, Jianming Wen, Junyue Gao, Wei Wei, Yuantao Zhao, Quan Shao, Yanfeng Jia
  • Patent number: 10431983
    Abstract: A system and method for controlling a grid-connected reactive power compensation inverter. The system uses a combination of feedforward and feedback controls to compute a reference voltage signal based on sensor-measured voltages and currents, where the reference voltage signal is used to control the inverter switches. The disclosed method modifies a cross-couple feedforward signal used in the reference voltage calculations, where the modified cross-couple signal includes a combination of both reference and actual currents, and the modified control scheme reduces the DC-link voltage overshoot experienced during a capacitive overload event while still providing the required reactive power and maintaining grid system stability.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: October 1, 2019
    Assignee: S & C Electric Company
    Inventors: Zitao Wang, Christine McNeil, James Fisher
  • Patent number: 10420619
    Abstract: A surgical manipulator operates in a manual mode in which a user applies forces and torques to the surgical instrument to cause movement of the energy applicator. The surgical manipulator also operates in a semi-autonomous mode in which the surgical manipulator moves the energy applicator along a tool path. A controller monitors output of a force/torque sensor as the energy applicator is being moved along the tool path in the semi-autonomous mode and transitions from the semi-autonomous mode to the manual mode in response to the output exceeding a limit.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: September 24, 2019
    Assignee: STRYKER CORPORATION
    Inventors: David Gene Bowling, John Michael Stuart, Joel N. Beer, John S. Ketchel
  • Patent number: 10411639
    Abstract: Method for dissipating the elastically stored energy of a tool operated with an electric motor (20), comprising determining the rotational speed of the electric motor; determining a limit torque for the electric motor (20) using the rotational speed, at which limit torque the energy is converted at least predominantly into copper losses of the electric motor; and driving the electric motor (20) by means of a rotational speed regulation with a decreasing rotational speed, while complying with the limit torque as motor torque upper limit.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: September 10, 2019
    Assignee: WITTENSTEIN SE
    Inventors: Matthias Essig, Andreas Spielmann
  • Patent number: 10406662
    Abstract: An impact tool includes a controller configured to control power being delivered to the and operable in one of: (a) a normal mode where the controller allows power to be delivered to the motor so that the impact mechanism transitions from operation in the rotary mode to operation in the impacting mode when an output torque exceeds a normal transition torque; and (b) a control mode where the controller controls power being delivered to the motor so that the impact mechanism transitions from operation in the rotary mode to operation in the impacting mode when an output torque exceeds a control transition torque that is greater than the normal transition torque.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: September 10, 2019
    Assignee: BLACK & DECKER INC.
    Inventors: Jason K. Leh, Karim Najjar, Scott M. Rudolph, Daniel White
  • Patent number: 10390858
    Abstract: A surgical instrument includes: an end effector; a power source; a motor coupled to the power source, the motor configured to actuate the end effector; and a controller operatively coupled to the motor and configured to control the motor based on a current draw of the motor and an angular velocity of the motor.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: August 27, 2019
    Assignee: Covidien LP
    Inventors: Christopher Kelly Evans, Anthony Calderoni
  • Patent number: 10393622
    Abstract: A method with respect to a system that includes an electrical motor and a speed output unit, and the electrical motor is followed by a gear, wherein the following acts are performed by a processor of a controller of a motor drive: monitoring a first set of frequencies from the system over a measurement period when the system is in a known good operating condition; storing the first set of monitored frequencies or derivatives thereof as reference data in a long-term storage system, monitoring a second set of frequencies from the system over a measurement period when the system is in an unknown operating condition, comparing the second set of monitored frequencies with the first set of monitored frequencies in a frequency domain and in the frequency domain, detecting changes between corresponding frequencies resulting from the second set of monitored frequencies and the first set of monitored frequencies.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: August 27, 2019
    Assignee: KONECRANES GLOBAL CORPORATION
    Inventors: Heikki Mesiä, Juhani Kerovuori, Ilkka Harra, Aapo Jantunen, Janne Salomäki
  • Patent number: 10391884
    Abstract: A drive power control device includes: a modeling error reduction unit configured to calculate a correction torque by performing high-pass filter processing on a correction amount calculated by a correction amount calculation unit; a control motor torque command value calculation unit configured to calculate a control motor torque command value by adding the correction torque to a motor torque command value; and a slip reduction control unit configured to perform, when the vehicle starts traveling or slip is detected, control to reduce slip by switching the cutoff frequency of a high-pass filter HPF to be low as compared with normal traveling.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: August 27, 2019
    Assignee: CALSONIC KANSEI CORPORATION
    Inventor: Toshiyuki Iwahana
  • Patent number: 10386937
    Abstract: Disclosed are object detection systems for automated compartment closure assemblies, methods for operating such systems, and motor vehicles with a power liftgate assembly and foreign object detection capabilities. A method is disclosed for detecting objects obstructing the path of an automated closure assembly. The method includes receiving a command signal to move the closure assembly to an open or closed position, and receiving gesture-sensitive sensor signals with a location and velocity of an object within a supervision field. Responsive to the object being inside a protected zone within the supervision field or the object's velocity being towards the protected zone, commanding an automated driving mechanism to: slow the closure assembly's speed; if the object is still located inside the protected zone after a calibrated period of time, stop the closure assembly; and if the object moves outside the protected zone, increase the closure assembly speed to a default speed.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: August 20, 2019
    Assignee: GM Global Technology Operations LLC
    Inventors: Doru N. Serban, Princess Len Carlos
  • Patent number: 10389290
    Abstract: A motor control apparatus applied to a structure in which a plurality of synchronous motors connected in parallel and mechanically coupled to each other is driven by a single power converter, includes a vector control unit and an abnormality detection unit. The vector control unit divides a current flowing in/out the synchronous motors into a q-axis current and a d-axis current and individually controls the divided currents based on a q-axis current command value and a d-axis current command value. The abnormality detection unit detects whether at least one synchronous motor is wrongly wired or is disconnected based on a q-axis inductance, the q-axis current command value, a rotation speed of the synchronous motors, and a d-axis voltage command value.
    Type: Grant
    Filed: September 5, 2016
    Date of Patent: August 20, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Makoto Higashino, Satoru Terashima
  • Patent number: 10389279
    Abstract: To provide a controller of a rotary electric machine which can prevent the vibration torque component to be outputted by the rotary electric machine from being upper-limited by the maximum output torque of the rotary electric machine. A controller of a rotary electric machine decreases an amplitude of the vibration torque command value so that a vibration maximum value obtained by adding an amplitude of a vibration torque command value to a basic torque command value becomes less than or equal to an upper limit command value; and calculates a value obtained by upper-limiting an addition torque command value, which is obtained by adding the vibration torque command value to the basic torque command value, by the upper limit command value, as a final torque command value.
    Type: Grant
    Filed: December 24, 2015
    Date of Patent: August 20, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroyuki Saito, Hideaki Tani, Yasufumi Ogawa
  • Patent number: 10389289
    Abstract: A method of controlling a motor in a motor control system is provided. The method determines a control voltage budget value based on an operating region of the motor. The method adjusts a supply voltage signal based on the control voltage budget value. The method determines a motor voltage command based on the adjusted supply voltage signal. The method applies a voltage corresponding to the motor voltage command to the motor in order to generate a desired motor torque.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: August 20, 2019
    Assignee: Steering Solutions IP Holding Corporation
    Inventors: Julie A. Kleinau, Siddharth Ballal
  • Patent number: 10378648
    Abstract: A control circuit controls driving of a motor to switch over a shift range. A target rotation speed setting part sets a target rotation speed of the motor. A rotation speed detection part detects a present rotation speed, which is an actual rotation speed, of the motor. A rotation speed error calculation part calculates a rotation speed error, which is an error between the target rotation speed and the present rotation speed. A request torque calculation part calculates a request torque for the motor based on the rotation speed error. A phase lead correction value calculation part calculates a phase lead correction value of a current supply phase relative to a rotation phase of a rotor of the motor based on the request torque.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: August 13, 2019
    Assignee: DENSO CORPORATION
    Inventor: Jun Yamada