Specific Processing Of Feedback Signal Or Circuit Therefore (i.e., A-d Conversion, Compression, Or Modification) Patents (Class 318/400.04)
  • Patent number: 11876472
    Abstract: The disclosure includes a control system for a multi-phase electric machine that includes an inverter configured to transfer electric energy from a rechargeable energy storage device (RESS), and phase current sensors. A controller includes an executable instruction set to monitor, via the phase current sensors, the phase currents, and detect that one of the phase currents is outside a linear measurement range of a respective one of the phase current sensors. An extrapolated current for the respective one of the phase current sensors is determined based upon the phase currents from others of the phase current sensors. A current extrapolation routine evaluates the respective one of the phase current sensors. A fault is detected in the respective one of the phase current sensors based upon the current extrapolation routine and the extrapolated current.
    Type: Grant
    Filed: March 21, 2022
    Date of Patent: January 16, 2024
    Assignee: GM Global Technology Operations LLC
    Inventors: Brent S. Gagas, Brian A. Welchko
  • Patent number: 11855561
    Abstract: A motor control determines if a motor is rotating at steady state velocity and then populates a table with information about each individual motor sector. At steady state velocity, the duration of the motor within an electrical sector is measured. The duration of the complete mechanical rotation of the motor is determined. The controller determines a ratio of the measured duration of the sector to a duration of a complete mechanical rotation of the motor. The ratio of sector duration to rotation duration is stored in a table. The controller is configured for controlling the motor using the table values.
    Type: Grant
    Filed: February 16, 2022
    Date of Patent: December 26, 2023
    Assignee: Insight Automation, Inc.
    Inventors: Emil V. Popov, Ivaylo N. Sotirov
  • Patent number: 11798587
    Abstract: Various illustrative aspects are directed to a data storage device comprising: a voice coil motor (VCM) and one or more processing devices, configured to actuate the VCM, switch on measuring a back electromotive force (BEMF) from the VCM for intervals of an initial BEMF measurement that are free of spikes in the initial BEMF measurement, and process a measured BEMF signal from the intervals of the initial BEMF measurement that are free of spikes in a change of current term of the initial BEMF measurement.
    Type: Grant
    Filed: March 14, 2022
    Date of Patent: October 24, 2023
    Assignee: Western Digital Technologies, Inc.
    Inventors: Guoxiao Guo, Jianbin Nie, Triet Tieu, Duc H. Banh, Tianyu Jiang
  • Patent number: 11754421
    Abstract: A resolver signal processing device includes a deviation calculation unit, a PI operation unit, and an integration operation unit. The deviation calculation unit calculates a deviation between a first product obtained by multiplying a signal of phase A by a cosine value based on a reference phase ?ref and a second product obtained by multiplying a signal of phase B by a sine value based on the reference phase ?ref. The PI operation unit carries out a proportional integration operation which includes a first integration operation and is defined to converge the deviation on zero on the basis of the deviation. The integration operation unit carries out a second integration operation of integrating a value generated from a result of the proportional integration operation and outputs a result of the second integration operation as phase information of the resolver.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: September 12, 2023
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Chikara Morito, Hajime Shiraishi
  • Patent number: 11671042
    Abstract: Disclosed are implementations, including a method that includes obtaining measurement samples relating to electrical operation of an electric motor drive providing power to an electric motor, deriving, based on the samples, instantaneous estimates for parameters characterizing speed and/or position of the motor according to an optimization process based on a cost function defined for the samples, and applying a filtering operation to the instantaneous estimates to generate filtered values of the motor's speed and/or position. The filtering operation includes computing the filtered values using the derived instantaneous estimates in response to a determination that a computed convexity of the cost function is greater than or equal to a convexity threshold value, and/or applying a least-squares filtering operation to the derived instantaneous estimates and using at least one set of previous estimates derived according to the optimization process applied to previous measurement samples.
    Type: Grant
    Filed: September 24, 2021
    Date of Patent: June 6, 2023
    Assignee: Tire Trustees of Columbia University in the City of New York
    Inventor: Matthias Preindl
  • Patent number: 11619912
    Abstract: An electronic timepiece, including: a motor having a rotor and at least two coils, the rotor being configured to rotate to a plurality of prescribed positions; and a driving processor for driving the motor, the driving processor being configured to: generate a detection pulse for detecting whether or not the rotor has rotated; cause the generated detection pulse to be applied to at least one of the at least two coils; receive a signal indicating a detected value of current flowing in the at least one of the at least two coils that is generated in response to the detection pulse outputted to the at least one of the at least two coils; and determine whether or not the rotor has rotated to one of the plurality of prescribed positions on the basis of the detected value of current.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: April 4, 2023
    Assignee: CASIO COMPUTER CO., LTD.
    Inventor: Yuta Saito
  • Patent number: 11519756
    Abstract: A rotation detection device includes: a detector arranged with a gap to a rotating body in which rotation position information is periodically provided at regular intervals, and detecting a magnetic change as a rotation position of the rotating body; and a signal processor acquiring the rotation position information. The detector has first and second magnetic elements arranged with an interval of a/2 in a rotation direction. Each regular interval is defined as a. The first magnetic element outputs a first signal having a period corresponding to the regular intervals. The second magnetic element outputs a second signal having an opposite phase to the first signal and the period. The signal processor acquires a differential signal between the first and second signals as the rotation position information.
    Type: Grant
    Filed: May 27, 2021
    Date of Patent: December 6, 2022
    Assignee: DENSO CORPORATION
    Inventors: Atsushi Kobayashi, Michihiro Makita, Yusuke Kariya
  • Patent number: 11451166
    Abstract: A power conversion device includes a power conversion circuit and a control device. The control device includes a virtual power generation device model unit and a control signal generation unit. The virtual power generation device model unit includes: a motor model unit; an AVR model unit; an angular velocity difference acquisition unit; and a power generator model unit. The control signal generation unit is configured to generate the pulse width modulation signal based on the current command value and an output current value from the power conversion circuit.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: September 20, 2022
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Yoshinori Tsuruma, Noriko Kawakami, Yukihisa Iijima, Kentaro Suzuki
  • Patent number: 11420672
    Abstract: A power conversion device includes a first converter connected to first ends of windings of each phase of a motor, a second converter connected to second ends of the windings of each phase, and a switching circuit used to define a neutral point in the windings of each phase on the first inverter side. At least one of a plurality of switches included in the first inverter has a first current capacity, and a plurality of switches included in the second inverter have a second current capacity that is greater than the first current capacity.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: August 23, 2022
    Assignee: NIDEC CORPORATION
    Inventor: Hiromitsu Ohashi
  • Patent number: 11384770
    Abstract: The present disclosure can provide a vacuum pump capable of obtaining a rotation direction and correcting the rotation direction without adding a dedicated rotation direction sensor even in a state of low-speed rotation. The control device is capable of obtaining at least a first state in which a rotor shaft rotates at relatively high speed, and a second state in which the rotor shaft deviates within a gap between the rotor shaft and a protective bearing and rotates at relatively low speed while revolving, acquires output information of a radial displacement sensor, obtains a rotation direction of the rotor shaft in the second state on the basis of the output information, determines whether the rotation direction is normal or not, and when the rotation direction is not normal, stops the rotation and increases rotation speed to achieve a normal rotation direction.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: July 12, 2022
    Assignee: Edwards Japan Limited
    Inventors: Hideo Fukami, Yoshinobu Ohtachi, Yasushi Maejima, Tsutomu Takaada
  • Patent number: 11362610
    Abstract: A method for operating a permanent magnet synchronous motor comprises setting a maximum power, determining a current vector and an output voltage vector in the dq coordinate system. A setpoint amount for a setpoint voltage vector is calculated on the basis of the maximum power, the current vector and the output voltage vector. The setpoint voltage vector is generated with the setpoint amount, and then operating the permanent magnet synchronous motor at least with the setpoint voltage vector.
    Type: Grant
    Filed: February 17, 2021
    Date of Patent: June 14, 2022
    Assignee: Continental Teves AG & Co. OHG
    Inventors: Dominik Schulte, Bogdan Budianu, Eugen Bartel, Tom Kaufmann
  • Patent number: 11342875
    Abstract: An electrical machine includes a with a parallel first and second phase windings. A first neutral bus is connected to the first phase winding and a second neutral bus is connected to the second phase winding. A first voltage sensor is coupled to the first neutral bus and a second voltage sensor coupled to the second phase winding for monitoring current imbalance between the first and second phase windings.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: May 24, 2022
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Andreas C. Koenig, Joseph Kenneth Coldwate
  • Patent number: 11309821
    Abstract: A brushless DC motor control device for a ceiling fan is electrically connected to a brushless DC motor and includes at least one switch, a processor, and a driving module. The processor includes at least one detection module and a processing module. The switch transmits a switch signal to the detection module for detection. After the detection module detects an operating electric potential and a normal electric potential of the switch signal, the detection module outputs a detection signal to the processing module. The processing module outputs a control signal to the driving module, so that the driving module transmits a driving signal to the brushless DC motor to control the rotational speed, stop and rotational direction of the brushless DC motor.
    Type: Grant
    Filed: May 26, 2020
    Date of Patent: April 19, 2022
    Assignee: AIR COOL INDUSTRIAL CO., LTD.
    Inventor: Shih-Ming Chen
  • Patent number: 11283379
    Abstract: A method and an apparatus may detect a rotor magnetic pole of a single-phase BLDC motor. The method and apparatus may quickly and precisely initially drive the single-phase BLDC motor by detecting a position of a magnetic pole of a rotor adjacent to a stator by applying a high frequency voltage to the single-phase BLDC motor and analyzing a magnitude of a flowing current.
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: March 22, 2022
    Assignee: LG ELECTRONICS INC.
    Inventors: Jae Jun You, Hansu Jung, Jaemin Kim
  • Patent number: 11237213
    Abstract: A motor information acquisition system is provided that acquires information representing an operation state of a motor included in a machine tool in order to monitor a state of the machine tool and that includes a motor control device configured to control the motor based on control data, a timing generation section configured to generate acquisition timing of the information representing the operation state of the motor based on the control data, a rotor magnetic flux reduction command output section configured to output a command for reducing a magnetic flux density of a rotor of the motor to the motor control device when the acquisition timing is reached, and a motor information acquisition section configured to acquire information representing the operation state of the motor when the magnetic flux density of the rotor is reduced by the command.
    Type: Grant
    Filed: June 23, 2020
    Date of Patent: February 1, 2022
    Assignee: Fanuc Corporation
    Inventor: Yohei Kamiya
  • Patent number: 11228266
    Abstract: A permanent magnet synchronous machine (1) having a rotor (R) and a stator (S). Connection terminals (2) apply a feed alternating voltage with a feed frequency (f0). The permanent magnet synchronous machine (1) has a motor controller (10). The controller (10) has an assembly (11) to detect the terminal voltage on the connection terminals (2) and the current frequency (fa). Also, the controller has an analysis device (12). The analysis device (12) ascertains whether the current frequency (fa) contains a frequency component (fr) with a frequency that deviates from the feed frequency (f0).
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: January 18, 2022
    Assignee: ebm-papst Mulfingen GmbH & Co. KG
    Inventor: Ralph Wystup
  • Patent number: 11228263
    Abstract: A motor control apparatus that is configured to perform a power distribution control on three-phase coils of a brushless motor and that is configured to perform a rotation control of a rotor includes: a plurality of switching elements that are arranged to be capable of switching a current which is allowed to flow through the coils; a plurality of sensors that are configured to detect a rotation position of the rotor; and a control part that is configured to output a drive signal for controlling a power distribution pattern of each switching element according to a position detection signal which is obtained by correcting a position detection signal as an output of the plurality of sensors by using a predetermined correction coefficient, wherein the control part is configured to add a correction angle that corresponds to a difference between the position detection signals before and after correction of a predetermined sensor among the plurality of sensors to a setting value of an advance angle of the power dist
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: January 18, 2022
    Assignee: Mitsuba Corporation
    Inventor: Takeshi Ikeda
  • Patent number: 11193978
    Abstract: A power conversion device according to the present invention is connected to a rotating machine comprising an armature coil and supplies and receives power. The power conversion device has a function for: collectively applying voltage pulses to the armature coil or coils for one or more specific phases of the rotating machine, sampling the current values of the specific phases from the start of the rising or falling of the voltage pulses until a designated delay time, detecting variation in the capacitance of an insulation member of the armature coils of the specific phases of the rotating machine from variation from a normal state of the current values, and diagnosing insulation degradation.
    Type: Grant
    Filed: November 22, 2018
    Date of Patent: December 7, 2021
    Assignee: HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
    Inventors: Kohji Maki, Yoshitaka Iwaji, Tetsuji Kato
  • Patent number: 11159113
    Abstract: In the fault-tolerant direct thrust-force control (FT-DTC) method, the generalized Clarke transform matrix and its inverse matrix are derived according to the fault-tolerant phase currents. The stator fluxes in ?-? plane are deduced based on these. Based on the requirement of circular stator flux trajectory, virtual stator fluxes are defined, and then compensatory voltages in the ?-? plane are obtained. Actual stator voltages in the ?-? plane are calculated by modulation function of voltage source inverter. Combining with the compensatory voltages, the actual stator voltages and the stator currents, the virtual stator fluxes and the thrust-force are estimated by the flux and thrust-force observers. The thrust-force reference, the stator flux amplitude reference, the observed thrust-force and virtual stator flux are applied to predict virtual stator voltage references.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: October 26, 2021
    Assignee: JIANGSU UNIVERSITY
    Inventors: Huawei Zhou, Cheng Zhou, Guohai Liu, Duo Zhang
  • Patent number: 11115046
    Abstract: A system may include an output stage for driving a load at an output of the output stage, a pulse-width modulation mode path configured to pre-drive the output stage in a first mode of operation, a linear mode path configured to pre-drive the output stage in a second mode of operation and a loop filter coupled at its input to the output of the output stage and coupled at its output to both of the pulse-width modulation mode path and the linear mode path. The pulse-width modulation mode path and the linear mode path may be configured such that a first transfer function between the output of the loop filter and the output of the output stage is substantially equivalent to a second transfer function between the output of the loop filter and the output of the output stage.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: September 7, 2021
    Assignee: Cirrus Logic, Inc.
    Inventors: Vamsikrishna Parupalli, Mark May, Saurabh Singh, Ramya Balasundaram, Mengde Wang, Eric B. Smith
  • Patent number: 11095241
    Abstract: According to one embodiment, there is provided a motor control device including a detection circuit, a control circuit and a drive circuit. The detection circuit detects, in a direct current motor with a first coil and second coil, a first parameter related to an induced voltage generated in the first coil and a second parameter related to an induced voltage generated in the second coil. The control circuit changes, according to a difference between the first parameter and the second parameter, at least one of a first amplitude control value of a current of the first coil and a second amplitude control value of a current of the second coil. The drive circuit drives, according to the changed amplitude control value, the first coil and the second coil, respectively.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: August 17, 2021
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventor: Tsukasa Miura
  • Patent number: 11050371
    Abstract: A brushless direct-current (BLDC) motor has a connector, a stator, a rotor and a positioning module. The connector has three input ends for receiving three voltage signals, and a feedback end for receiving a feedback signal. The three voltage signals are transmitted to three windings of the stator. Rotation of the rotor is induced by interaction of magnetic fields of the three windings and a plurality of magnets of the rotor. The positioning module is fixed to the stator and has three Hall sensors for sensing positions of the magnets. The positioning module generates the feedback signal according to the positions of the plurality of magnets sensed by the three Hall sensors. The first voltage signal, the second voltage signal and the third voltage signal are adjusted according to the feedback signal.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: June 29, 2021
    Assignee: LINGDONG TECHNOLOGY (BEIJING) CO. LTD
    Inventors: Zhaoqiang Chen, Qingsong Yang, Pei Ruan, Guorong Ren
  • Patent number: 11018607
    Abstract: A motor driver device includes: a driver driving a motor by a driving method, wherein the driving method includes: a first driving method performing driving control of the motor based on zero cross timing of back electromotive force generated in a coil of a predetermined phase; and a second driving method performing driving control of the motor such that a first differential phase between zero cross timing of driving current flowing through the coil of the predetermined phase and zero cross timing of driving voltage applied to the coil of the predetermined phase coincides with predetermined first target phase, and wherein, even when the motor is being driven by the first driving method, the first differential phase is sequentially detected and, when transition from the first driving method to the second driving method occurs, the first differential phase detected immediately before the transition is set to the first target phase.
    Type: Grant
    Filed: October 8, 2019
    Date of Patent: May 25, 2021
    Assignee: Rohm Co., Ltd.
    Inventor: Hisashi Sugie
  • Patent number: 11003154
    Abstract: A motor control system includes motor control devices and a controller. The controller generates and transmits a communication signal including an operation command to the respective motor control devices. The motor control devices include two motor control devices in a first group, each of which includes a data transceiver, a motor controller, a corrector, and a synchronous timing generator, and a motor control device in a second group. The data transceiver receives an operation command issued to the motor control device, and receives operation information in the motor control device in the second group. Based on the operation command, the motor controller generates a torque command signal. The corrector generates a torque correction signal based on the operation information, and corrects the torque command signal. The synchronous timing generator generates a timing signal that matches pieces of process timing of the motor controllers in the first group with each other.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: May 11, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGENENT CO., LTD.
    Inventors: Mitsutaka Okura, Akinobu Tomita, Hiroshi Fujiwara, Yoshiaki Ikeuchi
  • Patent number: 11005397
    Abstract: A method for detecting the angular position of an electric motor includes: applying a first drive signal with a first polarity between first and second drive terminals that are coupled to respective stator windings of the electric motor; sensing at a third drive terminal a first signal resulting from the application of the first drive signal; applying a second drive signal with a second polarity between the first and second drive terminals, the second polarity being opposite the first polarity; sensing at the third drive terminal a second signal resulting from the application of the second drive signal; and producing a sum signal by summing the first and second signals, wherein the sum signal is indicative of an angular position of a rotor of the electric motor with respect to the stator windings.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: May 11, 2021
    Assignee: STMicroelectronics S.r.l.
    Inventor: Michele Boscolo Berto
  • Patent number: 10972021
    Abstract: Disclosed are a method and a system for processing fault information of a decoding chip in a rotary transformer. The method includes: reading data information transmitted by the decoding chip according to a preset period; determining whether the data information includes alarm information; when the data information includes the alarm information, estimating a rotor-position value after an alarm occurs in real time according to a rotational speed in the data information obtained before the alarm occurs; determining whether a difference between a current rotor-position value and the estimated rotor-position value is greater than a fault threshold; and when the difference between the current rotor-position value and the estimated rotor-position value is greater than the fault threshold, controlling a motor using the estimated rotor-position value.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: April 6, 2021
    Assignee: BEIJING ELECTRIC VEHICLE CO., LTD.
    Inventors: Yi Zheng, Yujun Li, Shengran Xiao, Ronghong Liu
  • Patent number: 10969400
    Abstract: In order to correct the rotation angle value without an increase in the circuit size, a rotation period measurement unit measures a rotation period of a rotary shaft in which a rotation angle is detected by using a resolver that outputs a signal corresponding to the rotation angle of the rotary shaft. A rotation speed calculation unit calculates the rotation speed of the rotary shaft based on the rotation period. An acceleration calculation unit calculates the rate of change of the rotation speed per interval when a given rotation angle of the rotary shaft is divided into 2n+1 intervals, in which n is an integer of 1 or more. An estimated angle calculation unit calculates the rotation angle estimation value, assuming that the rotary shaft performs a uniform acceleration motion, based on the rotation speed and the rate of change of the rotation speed. A correction value calculation unit calculates the correction value of the rotation angle value converted from the output signal of the resolver.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: April 6, 2021
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Yoshitaka Shibuya, Hayato Kimura
  • Patent number: 10914806
    Abstract: A method for dynamically compensating for the offset error of an acquisition system includes a current sensor to measure or estimate the current passing through an actuator of a electrical apparatus that is electrically supplied by an AC voltage, the acquisition system having a predetermined offset value, the method includes determining a plurality of periodic temporal operating ranges of the actuator in order to dynamically apply a compensation sequence for the offset error of the acquisition system, executing the compensation sequence during any one among the plurality of determined temporal operating ranges, the synchronization between the any one of the determined temporal operating ranges of the actuator and the execution of the compensation sequence being performed using a synchronization system including a synchronization module designed to identify reference times from the AC supply voltage of the sector.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: February 9, 2021
    Inventors: Damien Coutellier, Louis Schmerber
  • Patent number: 10903767
    Abstract: According to the present invention, in position sensorless control for switching between a 120-degree energization scheme for a low-speed region and a 180-degree energization scheme for a mid-to-high-speed region, stable and highly accurate speed control characteristics are provided by suppressing speed deviation ??r in the low-speed region, and by preventing current jump-up caused by a discontinuous rotational speed occurring during switching to the mid-to-high-speed region. In the case of driving in the 120-degree energization scheme, a voltage command value is corrected such that an estimated speed value or a detected speed value follows a speed command.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: January 26, 2021
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Agnes Hadinata, Yoshitaka Iwaji, Kazuaki Tobari, Yusaku Onuma, Takuya Sugimoto, Masato Ohya
  • Patent number: 10886864
    Abstract: A motor driving device according to embodiments includes a driving circuit, a controller, and a mask processor. The driving circuit switches, a voltage applied to a motor, according to a switching operation by plural switching elements, for a first switching operation and a second switching operation, and to control driving of the motor. The controller controls the driving circuit on the basis of timing when an electric current flowing to the motor exceeds a predetermined current value. The mask processor sets a predetermined mask time in the switching operation by the control of the driving circuit and enables a change of the predetermined mask time on the basis of at least one of a power supply voltage and the predetermined current value.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: January 5, 2021
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventor: Katsumasa Tanaka
  • Patent number: 10840834
    Abstract: The present invention addresses the problem of proposing a method for driving a sensorless motor, wherein the method is different from a conventional rotor position estimation method according to a time axis and performs rotor position estimation according to an angle axis, thus making it possible for excitation switching to always be achieved at an optimal angle in response to a change in speed. According to the present invention, an MCU (5) starts excitation of a coil at an excitation section starting point, measures an induced voltage component generated in the coil by a certain period of energization, integrates the voltage component, and sets an excitation section ending position when the integral value reaches zero. In addition, the motor is continuously rotated by repeating the same integration operation by switching to an excitation pattern in the next excitation section.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: November 17, 2020
    Assignee: HOKUTO CONTROL CO., LTD.
    Inventor: Kiyoshi Yamamoto
  • Patent number: 10763771
    Abstract: A method and a system for controlling a motor for a vehicle are provided. The vehicle is capable of being continuously driven by controlling the motor based on position information of a rotor derived using a sensorless estimation algorithm in the event of a failure of a position sensor of a motor rotor while the vehicle is being driven.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: September 1, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Heon Young Kwak, Chae Duck Chon, Ho Joon Shin
  • Patent number: 10749454
    Abstract: A method of operating a final drive unit clutch. The method provides an electric motor coupled with a clutch. The electric motor including a stator, a first Hall-effect sensor coupled with the stator, a second Hall-effect sensor coupled with the stator, a third Hall-effect sensor coupled with the stator, and a rotor having at least one magnetic pole pair. The method also provides for a controller in electrical communication with the electric motor. The method includes determining a first ideal commutation point, and calculating a first offset of a first Hall-effect sensor state change from the first ideal commutation point. The method further includes calculating a time delay of commutation, during the clutch transition between a non-torque transmitting position and a torque transmitting position, utilizing the first offset such that a second Hall-effect sensor state change corresponds with a second ideal commutation point.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: August 18, 2020
    Assignee: DANA BELGIUM N.V.
    Inventor: Stijn Goossens
  • Patent number: 10742143
    Abstract: A controller circuit for a brushless direct current (BLDC) motor may be configured to estimate a rotor position of the BLDC motor and apply a constant start-up voltage to a stator winding of the BLDC motor using the estimated rotor position until a current at the stator winding corresponds to a local minimum current. The controller circuit may be further configured to, in response to the current at the stator winding corresponding to the local minimum current, allow commutation of the current at the stator winding, calculate the rotor position in response to allowing the commutation of the current at the stator winding, and commutate the current at the stator winding using the calculated rotor position.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: August 11, 2020
    Assignee: Infineon Technologies AG
    Inventors: Christopher Roemmelmayer, Maximilian Burggraf
  • Patent number: 10738681
    Abstract: Apparatus for actuating and controlling the rotation, about their longitudinal axis (Y-Y), of blades (20) of cooling fans (10) for operating machines and/or vehicles, in particular agricultural tractors and off-road vehicles, said fan being mounted on a hub (11) which can be rotationally driven about its axis (X-X) by associated driving means (3,3a) suitable for connection to the heat engine (1) and mounted on a fixed support (5) by means of a bearing (3b) the apparatus comprising a ring (71) provided with a radial seat (71a) inside which a radial pin (72), eccentrically engaged in a base (73) integral with the shank (20a) of the blade (20), is inserted; an electric motor (30) which is coaxial with the axis (X-X) of the hub (11) and the shaft (31) of which is coaxially connected to a reduction gear (40), the kinematic output element (143) of which is coaxially connected by means of a screw (51a)/female thread (76a) coupling to a slider (76) displaceable in both directions along the axis (X-X) and kinematicall
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: August 11, 2020
    Assignee: BARUFFALDI S.P.A.
    Inventor: Piercarlo Boffelli
  • Patent number: 10693407
    Abstract: A driver unit for an interior permanent magnet motor (IPM) is presented. The driver unit includes sensor electronics configured to sense a phase voltage corresponding to one or more phase terminals of the IPM motor to generate a corresponding phase voltage signal. The driver unit further includes a controller electrically coupled to the sensor electronics and configured to extract one or more triplen harmonics of an order of a ninth harmonic and higher than the ninth harmonic of a fundamental frequency of the phase voltage signal corresponding to the one or more phase terminals. The controller is further configured to determine an angular position of a rotor of the IPM motor based on the extracted one or more triplen harmonics. Related motor assembly and method for controlling the IPM motor are also presented.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: June 23, 2020
    Assignee: BAKER HUGHES OILFIELD OPERATIONS, LLC
    Inventors: Shahid Ali, Rahul Radhakrishna Pillai, Jigarkumar Narendrabhai Hingu, Vandana Rallabandi
  • Patent number: 10662953
    Abstract: A fluid extraction system is presented. The fluid extraction system includes a direct current (DC) bus and a plurality of fluid extraction sub-systems configured to be electrically coupled to the DC-bus. At least one fluid extraction sub-system includes an electric machine configured to aid in the extraction of a fluid from a well. The electric machine includes a plurality of phase windings and a rotor. The at least one fluid extraction sub-system further includes a control sub-system to control a rotational speed of the rotor by selectively controlling a supply of a phase current to the plurality of phase windings such that the rotational speed of the rotor of the electric machine is different from rotational speed of a rotor of another electric machine in at least one of other fluid extraction sub-systems. Related method for controlling rotational speeds of electric machines is also presented.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: May 26, 2020
    Assignee: Baker Hughes Oilfield Operations, LLC
    Inventors: David Allan Torrey, Nathaniel Benedict Hawes, Ayman Mohamed Fawzi El-Refaie, Muhammad Hassan Chishti
  • Patent number: 10658948
    Abstract: A DC/AC electrical power converter device having inlet terminals for electrically connecting to a DC electricity power supply network, outlet terminals for electrically connecting to an electric motor, a chopper electrical converter coupled to the inlet terminals, and an electrical inverter coupled between the chopper electrical converter and the outlet terminals. The converter device further includes a control unit for controlling the electrical inverter and that is configured to operate using pre-calculated pulse width modulation with pre-calculated unchanging switching instants for the controlled switches of the electrical inverter regardless of the frequency of rotation of the motor and of the voltage of the electricity network for connection to the device.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: May 19, 2020
    Assignee: SAFRAN ELECTRICAL & POWER
    Inventors: Guillaume Boulet, Wenceslas Bourse, Pascal Rollin, Jeremy Cuenot, Regis Bernard Albert Meuret
  • Patent number: 10651894
    Abstract: A transceiver capable of common mode operating range and output voltage tolerance set by an isolation boundary and not limited by the device type used in the circuitry. The subject technology is a powered isolated transceiver, where the isolated generated supply and ground nodes are concealed and thus do not participate in tests that stress electrostatic discharge (ESD)/electrical overstress (EOS) or voltage tolerance. The architecture of the subject technology has the advantage of extremely high common mode performance and robust performance using low voltage devices and simplified architecture, which in turn provides less capacitive loading, faster operation, less expensive die development, electromagnetic interference (EMI) advantages, and simple active termination. The subject technology includes an isolation architecture that can be used in environments where isolation is used but is also advantageous in systems without the need for isolation.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: May 12, 2020
    Assignee: Linear Technology Holding LLC
    Inventor: Steven John Tanghe
  • Patent number: 10644623
    Abstract: Based on an output signal, among a plurality of switching elements, an element control part outputs a PWM signal having a maximum duty ratio to a pair of switching elements that drive a first coil among a plurality of coils to a high level, outputs a PWM signal having a minimum duty ratio to a pair of switching elements that are connected to each other in series and that drive a second coil among the plurality of coils to a low level, and outputs a PWM signal having a medium duty ratio between the maximum duty ratio of the PWM signal and the minimum duty ratio of the PWM signal to a pair of switching elements that are connected to each other in series and that drive a third coil among the plurality of coils.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: May 5, 2020
    Assignee: Mitsuba Corporation
    Inventors: Tamotsu Iwazaki, Toru Furusawa, Takashi Hoshino, Tomofumi Kobayashi
  • Patent number: 10644625
    Abstract: Implementations of a system for sensing rotor position of a PMSM may include: a controller which may be coupled with the PMSM. The controller may be configured to apply a plurality of voltage vectors to the PMSM to generate a plurality of sensing signals from a stator of the PMSM in response. A comparator may be coupled to the PMSM configured to receive and to compare each one of the plurality of sensing signals with a threshold voltage. A rise time measurement circuit may calculate a plurality of rise times using the plurality of sensing signals in response to receiving a signal from the comparator. The rotor-angle estimation circuit may be configured to identify from the plurality of rise times a shortest rise time and a voltage vector corresponding with the shortest rise time and thereby identify the position of the rotor of the PMSM.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: May 5, 2020
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Masanori Okubayashi
  • Patent number: 10637383
    Abstract: A system and method is provided to monitor wear on a power factor correction capacitor in a motor system. The system and method obtains a baseline inductance angle, reactive power or power factor corresponding to a baseline power factor correction by the capacitor in the circuit; monitors a current supplied to the motor at a location upstream of the capacitor; monitors a voltage supplied to the motor, and determines a present inductance angle, reactive power or power factor based on the monitored current and voltage. The present inductance angle, reactive power or power factor corresponds to a present power factor correction by the capacitor. The system and method can then determine when the power factor correction of the capacitor has degraded to an unsatisfactory level based on a change in the inductance angle, reactive power or power factor from the baseline values, and take appropriate action.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: April 28, 2020
    Assignee: SCHNEIDER ELECTRIC USA, INC.
    Inventors: Richard K. Weiler, Benjamin W. Edwards, Alan E. Freeman, Kevin M. Jefferies, Julius M. Liptak, Matthew L. White
  • Patent number: 10602009
    Abstract: An apparatus according to the aspect of the embodiments includes a phase determiner configured to determine a rotational phase of a rotor, a speed determiner configured to determine a rotational speed of the rotor, a controller having a first control mode for controlling the motor by supplying constant currents to windings, and a discriminator configured to discriminate whether a rotation of the motor is abnormal based on the rotational speed when the rotational speed corresponding to a command speed is equal to or higher than a predetermined value in a state where the controller is controlling the motor in the first control mode. When a signal output from the discriminator indicates that the rotation of the motor is abnormal, the controller stops the motor. When the signal output from the discriminator indicates that the rotation is not abnormal, the controller continues a drive of the motor.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: March 24, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Yuta Nito
  • Patent number: 10574160
    Abstract: A brushless motor includes: a 2n-pole (n: natural number) rotor; and a first Hall element and a second Hall element arranged at a positional relationship of an angle ? (0°<?<180°) from each other with respect to a rotation axis of the rotor. The first Hall element and the second Hall element each output a voltage signal in accordance with a magnitude of a magnetic field of the rotor. A rotational angle detection circuit for detecting a rotational angle of the brushless motor includes: a phase detection circuit that receives the voltage signals from the first Hall element and the second Hall element and that detects a phase of the rotor by using values of the voltage signals and information of the angle ?; and an angle calculation circuit that calculates a rotational angle of the rotor calculated from an initial angle based on the phase and a predetermined reference angle.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: February 25, 2020
    Assignee: PHC HOLDINGS CORPORATION
    Inventor: Kazuya Kondoh
  • Patent number: 10560044
    Abstract: A motor control method includes acquiring a component BEMF? on an ?-axis and a component BEMF? on a ?-axis of counter electromotive force of a motor in an ??-fixed coordinate system; performing time differentiation on the component BEMF? on the ?-axis and the component BEMF? on the ?-axis; obtaining a difference value between first and second multiplication values, the first multiplication value being obtained by multiplying the component BEMF? on the ?-axis by a differential value of the component BEMF? on the ?-axis, the second multiplication value being obtained by multiplying the component BEMF? on the ?-axis by a differential value of the component BEMF? on the ?-axis; detecting a rotation direction of the rotor based on the difference value; and controlling the motor based on a detection result of the rotation direction of the rotor.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: February 11, 2020
    Assignee: NIDEC CORPORATION
    Inventor: Ahmad Ghaderi
  • Patent number: 10541626
    Abstract: Power conversion systems and a controller thereof includes a first processing system that computes phase references for respective phase lines of an inverter according to a feedback value, a setpoint value, and a scaling factor to emulate a scaled frequency that is less than a switching frequency, and a second processing system that generates a carrier waveform having the switching frequency, receives the phase reference from the first processing system for each inverter phase line, and compares each phase reference with the carrier waveform to generate pulse width modulated switching control signals for switching devices of the inverter.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: January 21, 2020
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Jacob M. Lamb, Brian J. Seibel, Timothy M. Rowan, Lixiang Wei
  • Patent number: 10486689
    Abstract: A method includes automatically operating an electrified vehicle in a noise reduction mode, via a control system of the electrified vehicle, if, based at least on noise restriction information and driver history information received by the control system, a current time and a current location of the electrified vehicle are appropriate for invoking the noise reduction mode.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: November 26, 2019
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: David Farrell, Mark Steven Yamazaki, Ming Cheng, Tony Tae-Jin Pak, Nagarjuna Muvva
  • Patent number: 10476420
    Abstract: Provided herein is a BLDC motor having a control system, a rotor including a motor magnet having a plurality of alternating magnetic poles thereon, a stator and a ring magnet. The ring magnet is mounted on the rotor axially adjacent the motor magnet. The number of poles on the ring magnet is an integer multiple of the number of poles on the motor magnet. Also provided is a method for controlling the BLDC motor including the steps of supplying a current to the motor, determining if the torque produced by the motor is in a positive or negative direction, determining a multiplier based on the direction of the torque, multiplying the supplied current by the multiplier, implementing a commutation sequence to provide current to the motor, measuring the current in each of the plurality of windings and adjusting the current provided to the motor based on the measured current.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: November 12, 2019
    Assignee: Dana Automotive Systems Group, LLC
    Inventors: Stijn Goossens, Johannes van Ginkel
  • Patent number: 10447188
    Abstract: A method and system of controlling driving of a brushless DC electric motor (BLDC) of an electric water pump are provided. The method includes estimating an initial position of a rotor using a magnitude of a current detected in a three-phase coil wound on a stator and converting a current magnitude that reflects a rotational angle of the rotor with respect to the initial position into two direct currents based on the three-phase current. The converted direct currents are output and a rotational angle, a speed, a flux and a torque of the rotor are acquired based on values of the three-phase current, a voltage generated according to flow of the three-phase current, a predetermined coil resistance, and an inductance input. A speed of the motor is then adjusted based on the acquired rotational angle, speed, flux, and torque of the rotor.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: October 15, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Myung Hwa Ind. Co., Ltd.
    Inventors: Dong Soo Shim, Yeon Ho Kim, Byoung Hoon Choi, Jae Shin Yi, Hyeong Geun Song, Geun Oh Dong
  • Patent number: 10401261
    Abstract: An actuator monitoring system is provided with an electric actuator having a motor and a control unit which outputs a control command (CMD) to the motor to control the operation of the motor. The control unit calculates a use time of the electric actuator based on the control command (CMD) outputted to the motor. Moreover, the control unit estimates the lifetime of the electric actuator based on the calculated use time.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: September 3, 2019
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventor: Atsushi Kakino