Hysteresis Or Reluctance Motor Systems Patents (Class 318/701)
  • Patent number: 10967757
    Abstract: A control apparatus for a vehicle plant, which is capable of reducing computational load and a storage capacity in a case where the vehicle plant is controlled using a plurality of periodic function values having a plurality of frequencies different from each other. A control apparatus for a fuel cell device includes a first ECU and a second ECU. The second ECU calculates superposition sine wave value of one of frequencies Z to nZ (Hz) based on a frequency command value by a thinning method using a data group of one set of reference sine wave values, stored in a map. The second ECU executes an AC superposition control using the superposition sine wave value, and calculates impedance of the fuel cell device during execution of the AC superposition control. The first ECU executes fuel cell (FC) humidification control process such that the impedance becomes equal to a target value.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: April 6, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Ryota Kitamoto, Yukihiro Nozaki, Yasuhiro Maeda
  • Patent number: 10944344
    Abstract: An abnormality determination device has a detection unit configured to detect a change in a phase of a position signal, the phase of the position signal changing depending on a rotation of a rotor of a motor, a time measurement unit configured to measure a time depending on a detection timing of the detection of the change in the phase of the position signal, a comparison unit configured to compare a first time measured by the time measurement unit with a second time measured before the first time is measured, and a determination unit configured to determine that a drive state of the motor is abnormal based on a comparison result of the comparison of the first time with the second time.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: March 9, 2021
    Assignee: MINEBEA MITSUMI INC.
    Inventors: Hiroyuki Kaidu, Mitsunari Terada, Xiao Zhou
  • Patent number: 10913550
    Abstract: Feedback control circuitry includes rate limiter circuitry configured to generate a rate limited position command based on a position command for a controlled component and based on a speed command for the controlled component. The feedback control circuitry also includes error adjustment circuitry configured to apply a control gain to an error signal to generate an adjusted error signal. The error signal is based on position feedback and the rate limited position command, and the position feedback indicates a position of the controlled component. The feedback control circuitry further includes an output terminal configured to output a current command generated based on the adjusted error signal.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: February 9, 2021
    Assignee: THE BOEING COMPANY
    Inventors: Douglas C. Cameron, Dwayne C. Merna
  • Patent number: 10903771
    Abstract: A high torque density permanent magnet switched reluctance apparatus with a structure similar to a switched reluctance motor. The apparatus has an inner stator having a plurality of poles, and a rotor disposed radially outward of the inner stator and having a plurality of segments serving as poles. A respective winding is disposed between every pair of adjacent poles of the stator. The apparatus operates with a plurality of separately excitable phases, a given phase being excited by energizing the windings corresponding to the given phase. Excitation of a given phase causes induction of magnetic fluxes traversing a region substantially confined to the region of the stators and rotor segments corresponding to the given phase, and causes a substantial amount of flux to enter rotor segments not in the radial direction but perpendicular to the radial direction.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: January 26, 2021
    Assignee: Board of Regente, The University of Texas System
    Inventors: Amir Parsapour, Mehdi Moallem, Babak Fahimi
  • Patent number: 10852044
    Abstract: A device and method are provided to allow replacement of costlier motors with a retrofittable control board and a lower cost motors operating a several speeds to provide variable (but not continuously variable) blower airflow. The control signals normally used to command the motor being replaced are only used to detect the need to activate the blower motor; once detected, the control board activates the replacement blower motor by energizing a blower motor speed tap with the evaporator blower initially set to a high speed. Then the blower speed is lowered if a predetermined negligibly small, acceptable change in evaporator temperature has occurred. Given the number of speed taps on the replacement blower motor, the evaporator blower speed is continued to be reduced from the initially set high speed as long as there is only an acceptably small change in the measured evaporator temperature.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: December 1, 2020
    Assignee: Mainstream Engineering Corporation
    Inventors: Dana L. Elliott, Luke Falls, Robert P. Scaringe, David C. Hahn
  • Patent number: 10833625
    Abstract: A fan assembly is provided. The fan assembly includes a fan, a motor that is coupled to the fan, and a variable frequency drive (VFD) that is coupled to the motor. The motor includes a maximum rated speed that is greater than a maximum structural speed limit of the fan, and the VFD includes a current output limit configured to limit an operational speed of the motor to be less than or equal to the maximum structural speed limit of the fan.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: November 10, 2020
    Assignee: Johnson Controls Technology Company
    Inventors: Harold J. Dubensky, James K. Spitzer, Roderick Ray Sentz, Kevin R. Stockton
  • Patent number: 10819264
    Abstract: A robust starting system and method for an interior permanent magnet synchronous motor, suitable for commercial fan and blower drive applications. A comprehensive starting control process is provided that utilizes control flags to implement closed-loop control accounting for any pre-existing rotor movement, controlling the motor speed from an initial speed to a destination speed. A universal dqController provides selective configurability for collecting information regarding the initial state of the motor, as well as starting and operational motor control. Dynamic high frequency injection enables the use of HFI outside the normal standstill motor speeds by intelligently decoupling the high frequency and rotor movement portions of the stator current response.
    Type: Grant
    Filed: August 4, 2020
    Date of Patent: October 27, 2020
    Assignee: Wolong Electric Group Co. Ltd.
    Inventors: Radu Bojoi, Zheng Zhang, Ze Jiang
  • Patent number: 10788551
    Abstract: In a magnetic resonance imaging (MRI) system, synchronized control of the operation of a gradient amplifier subsystem, a power supply subsystem, and a power distribution unit subsystem is accomplished by providing a coil command reference signal as an input to respective control blocks of the gradient amplifier subsystem, the power supply subsystem, and the power distribution unit subsystem. The coil command reference signal corresponds to a predetermined gradient coil current for at least one gradient coil of a scanner of the MRI system.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: September 29, 2020
    Assignee: General Electric Company
    Inventors: Yash Veer Singh, Ruxi Wang, Juan Antonio Sabate, Kanakasabai Viswanathan
  • Patent number: 10655987
    Abstract: Disclosed is a resolver robust against external noise and having a reduced error in the detection of a rotation angle, which includes a stator made of a magnetic material and having a plurality of teeth and a plurality of slots alternately formed at an inner side thereof, insulation covers respectively having a tooth insulating unit formed at an inner side thereof corresponding to the teeth and mounted to the stator at both upper and lower surfaces of the stator, and coils wound on the teeth with the tooth insulating unit being interposed therebetween, wherein regarding winding widths of coils located at an outermost circumference among the wound coils, a ratio of a shortest winding width to a longest winding width is 0.69 or above and 1 or below.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: May 19, 2020
    Assignee: LS AUTOMOTIVE TECHNOLOGIES CO., LTD.
    Inventors: Won-Yong Lee, Byung-Cheol Na, Da-Hee Sim, Seong-Wook Lee, Yeon-Muk Choi
  • Patent number: 10644622
    Abstract: A shift range control apparatus switches shift range by controlling the drive of a motor. The shift range control apparatus includes a feedback controller that is configured to perform position feedback control based on a target angle determined corresponding to the request shift range and the actual angle of the motor; a stationary phase energization controller that is configured to perform stationary phase energization control that energizes a stationary phase selected corresponding to an actual angle; and a switching controller that switches between motor control states. The switching controller switches the control state to position feedback control when the request shift range is switched. When the difference between the target angle and the actual angle becomes equal to or less than an angle determination threshold value, the switching controller switches the control state from position feedback control to the stationary phase energization control.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: May 5, 2020
    Assignee: DENSO CORPORATION
    Inventor: Shigeru Kamio
  • Patent number: 10630213
    Abstract: A motor control integrated circuit according to embodiments outputs predetermined PWM signals to an inverter circuit that drives a synchronous motor and is configured to perform on-off control on a plurality of three-phase bridge connected switching elements in accordance with the PWM signals to convert direct current into three-phase alternating current, and includes: a PWM generation unit configured to generate the signals based on a received speed command value and output the PWM signals; and a current detection unit configured to detect differential values of phase currents at a predetermined time point that is fixed within a period of a carrier wave used for PWM control, based on the carrier wave and a signal generated by a current detector for detecting current conducted to the synchronous motor, wherein the PWM generation unit calculates a speed of the synchronous motor based on the differential values and then, based on the speed, generates the PWM signals to be applied to the synchronous motor.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: April 21, 2020
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Sari Maekawa, Shinichi Kominato, Toshimitsu Aizawa, Naoki Oomura, Junichiro Hagura, Sadao Ikeda
  • Patent number: 10574116
    Abstract: A starter includes a three-phase switched reluctance electric motor including a rotor and a stator, a pinion gear, a power inverter that is connected to the stator, and a rotational position sensor. The rotor includes a quantity of rotor poles that is between 6 and 16, and the stator includes a quantity of stator poles that is between 8 and 24. An outer diameter of the electric motor is less than 85 mm. An active length of the motor is less than 50 mm. An airgap distance between the rotor and the stator is between 0.1 mm and 0.5 mm. A ratio between a rotor pole arc and a stator pole arc is at least 1.0:1. A ratio between a stator diameter and a rotor diameter is at least 2.0:1, and a ratio between a stator pole height and a rotor pole height is at least 2.5:1.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: February 25, 2020
    Assignee: GM Global Technology Operations LLC
    Inventors: Avoki M. Omekanda, Lei Hao, Chandra S. Namuduri, Suresh Gopalakrishnan, Thomas W. Nehl
  • Patent number: 10547849
    Abstract: An image processing system incorporates a distortion correction (DC) sub-system in order to quickly correct skewed images. The DC sub-system includes a buffer, a processor and a sparse matrix table (SMT). The buffer is sized according to an amount of distortion in an input image. Input image pixels from an input frame are buffered in the buffer, and other input image pixels from the same frame overwrite the buffered input image pixels, reducing latency of the DC sub-system. The SMT is dynamically configurable and provides mapping values for mapping output pixels to input pixels. The processor implements combinational logic, including multipliers, lookup tables and adders. The combinational logic interpolates flow control parameters, pixel coordinate values, and pixel intensity values. The distortion correction values are streamed to a display or provided to a subsequent image processing block for further processing.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: January 28, 2020
    Assignee: Rockwell Collins, Inc.
    Inventors: Peter R. Bellows, Andrew J. LeVake, Sung J. Kim, David W. Jensen, Allen P. Mass, John K. Gee, Jeffrey D. Russell
  • Patent number: 10451647
    Abstract: A method for measuring speed of a permanent magnet synchronous motor includes: acquiring a number K of pulse signals received in a current measuring period and outputted by an incremental encoder; acquiring a first duration Sn-1 between a time point when a pulse is last received in a previous measuring period and a time point when the previous measuring period ends, and a second duration Sn between a time point when a pulse is last received in the current measuring period and a time point when the current measuring period ends; calculating a third duration T0, measured between the time point when the pulse is last received in the previous measuring period and the time point when the pulse is last received in the current measuring period, according to the length T of the current, measuring period, the first duration Sn-1 and the second duration Sn; and calculating a motor speed v according to formula: v = K K 0 × 1 T ? ? 0 .
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: October 22, 2019
    Assignee: UBTECH Robotics Corp.
    Inventors: Youjun Xiong, Wenhua Fan, Lifu Zhang, Jianyun Xiao
  • Patent number: 10440858
    Abstract: An identification method is an identification method for use in an identification apparatus that identifies types of brushless DC motors each including a circuit board on which a terminal for tachometer is mounted. The numbers of pulses per rotation or unit time outputted from the terminals for tachometer vary among multiple types of brushless DC motors. The identification method includes: supplying a power supply voltage from the identification apparatus to a brushless DC motor; inputting a pulse signal outputted from the terminal for tachometer of the circuit board to the identification apparatus; counting the number of pulses in the pulse signal; obtaining a unique information piece of the brushless DC motor based on the counted number of pulses; and identifying a type of the brushless DC motor based on the unique information piece of the brushless DC motor.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: October 8, 2019
    Assignee: NIDEC CORPORATION
    Inventor: Hideyuki Takemoto
  • Patent number: 10411628
    Abstract: A servo control strategy and system eliminates CEMF and load torque disturbances. The total disturbance at electrical portion is estimated using extended state observer based on a nominal model of armature winding with measured voltage impressed across two endpoints of armature winding and the measured armature current. The total disturbance at electrical portion is partially counteracted by feed-forward compensation. The remaining CEMF disturbance is eliminated with the aid of armature current feedback regulation. The electrical disturbance can be totally eliminated at inner loop of the system by combining feed-forward control with current feedback control. The total disturbance at mechanical portion is estimated using extended state observer based on a nominal model of drive system with measured armature current and actual speed. The total disturbance at mechanical portion is partially counteracted by feed-forward compensation.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: September 10, 2019
    Assignee: SHANDONG UNIVERSITY
    Inventor: Jinbo Liu
  • Patent number: 10393811
    Abstract: A quantitative evaluation method for the reliability of a Markov model switched reluctance motor system. The method comprises: solving a probability matrix P?T(t) of a switched reluctance motor system being in any survival state at any time t via a state conversion diagram of the switched reluctance motor system; calculating the sum of various elements of the probability matrix P?T(t) of the survival state, so that a reliability function R(t) is obtained; and thus calculating the average working time of the switched reluctance motor system before failure, thereby realizing the quantitative evaluation of the switched reluctance motor system and satisfying the requirements for the reliability analysis of a switched reluctance motor drive system. This disclosure has a good engineering application value.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: August 27, 2019
    Assignee: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
    Inventors: Hao Chen, Xing Wang, Yuxiang Chen, Huan Yang
  • Patent number: 10333443
    Abstract: An apparatus and method for adjusting an amplitude of a drive signal applied to a device are presented. The method of driving a device includes providing a drive signal to drive the device, monitoring a gradient value of the response signal; and changing an amplitude level of the drive signal based on the gradient value. The monitoring of the gradient value includes sensing an electrical parameter of the response signal and calculating the gradient value based on the electrical parameter.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: June 25, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: David Eke, Krzysztof Nguyen
  • Patent number: 10302462
    Abstract: The various embodiment of the present disclosure provides a system to define and identify an absolute mechanical reference position for a rotating element, The system comprises a radial ring magnet comprising plurality of pole pairs mounted to the rotating element, a first magnetic sensor in proximity of the radial ring magnet to detect angular position of said rotating element, at least one second magnetic sensor in proximity of the radial ring magnet to detect the passage of each of the pole pair and a control module adapted to define said absolute mechanical position by computing a unique first set of feature values for each of said plurality of pole pairs based on responses of said first magnetic sensor and said second magnetic sensor. The first set of feature values is stored in a memory unit.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: May 28, 2019
    Assignee: Robert Bosch GmbH
    Inventors: Zoltan Ersek, Arunkumar Motaganahalli Srinivasamurthy, Shadakshara P. Murthy
  • Patent number: 10298154
    Abstract: Unique systems, methods, techniques and apparatuses of a synchronous reluctance machine (SynRM) control are disclosed. One exemplary embodiment is a control device structured to operate a converter coupled to a synchronous reluctance machine and receive measurements of current. The device comprises a converter controller structured to detect a power supply restoration, operate the converter so as to transmit a series voltage vectors relative to the stationary reference frame to the stator of the synchronous reluctance machine, receive current measurements following the transmission of each of the voltage vectors, estimate the rotor position using the characteristics of the voltage vector and the received current measurements corresponding to at least one voltage vector, estimate the rotor speed using the characteristics of the voltage vectors and the received current measurements corresponding to at least two voltage vectors, and operate the converter so as to apply voltage to the stator.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: May 21, 2019
    Assignee: ABB Schweiz AG
    Inventors: Sara Ahmed, Kibok Lee, Srdjan Lukic
  • Patent number: 10273948
    Abstract: A method of operating a compressor includes obtaining a harmonic series representation of speed variation as the rotor rotates through each revolution. The method includes regulating an electric motor to compensate for or cancel out the periodic speed variation. Specifically, the method includes calculating an electromagnetic torque using a torque control input model based on the speed error and the harmonic series representation of the speed error. The operation of the electric motor is then adjusted such that the electromagnetic torque applied by the motor cancels out the speed variation such that noise and vibrations are minimized.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: April 30, 2019
    Assignees: Haier US Appliance Solutions, Inc., University of Louisville Research Foundation, Inc.
    Inventors: Paul Goodjohn, Joseph Wilson Latham, Michael Lee McIntyre
  • Patent number: 10193485
    Abstract: A short pitched switched reluctance motor control apparatus comprising a voltage provider comprising a first coupling and a second coupling configured to be coupled to a phase winding of the switched reluctance motor for applying a voltage to drive current in the winding between the first and second coupling is disclosed. The apparatus further comprises a controller configured to apply a first voltage pulse to the first coupling, and to apply a second voltage pulse to the second coupling, wherein the start of the second pulse is delayed with respect to the start of the first pulse, and the end of the first pulse is delayed with respect to the end of the second pulse.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: January 29, 2019
    Inventor: Peter Barrass
  • Patent number: 10181810
    Abstract: Methods and apparatus for determining a position of a rotor in motor, such as a three-phase motor by determining first and second ones of sectors in which a first one of the magnetic poles of the rotor may be positioned by driving phase pairs with complementary signals and examining a voltage of a floating one of the phases. Embodiments can further include driving first and second currents towards the first and second ones of the sectors and analyzing a time for each of the first and second currents to reach a threshold to identify which of the first and second ones of the sectors is aligned with the first one of the magnetic poles of the rotor.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: January 15, 2019
    Assignee: ALLEGRO MICROSYSTEMS, LLC
    Inventors: Yisong Lu, Lyndon Ambruson
  • Patent number: 10148200
    Abstract: An aspect of the present invention provides a circuit and arrangement for generating and amplifying an electric scalar potential field and a method for capturing the associated available electromagnetic energy into the system. The device is comprised of a transformer whose primary is powered periodically by short pulse durations; a resonant coupled transformer secondary circuit with synchronous parameter variation; and an extraction circuit of appropriate impedance and components to provide isolation and distribution to load.
    Type: Grant
    Filed: August 6, 2016
    Date of Patent: December 4, 2018
    Inventor: Shawn David Coleman, Jr.
  • Patent number: 10116243
    Abstract: Methods and apparatus for determining a position of a rotor in a three-phase motor by determining first and second ones of sectors in which a first one of the magnetic poles of the rotor may be positioned by respectively driving phase pairs complementary signals and examining a voltage of a floating one of the phases. Embodiments can include applying torque to the motor by driving at least one phase pair with respective signals aligned in phase and unequal duty cycles to move the rotor a given amount from the rotor position in the first or second ones of the sectors for determining the position of the rotor.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: October 30, 2018
    Assignee: ALLEGRO MICROSYSTEMS, LLC
    Inventors: Yisong Lu, Lyndon Ambruson
  • Patent number: 10103671
    Abstract: In a control apparatus for a rotary electric machine, a first manipulation unit manipulates, as control for a predetermined first region with respect to the controlled variable, a voltage phase of a voltage vector applied to an armature winding while controlling a field current to cause a deviation between an amplitude of an induced voltage and an amplitude of a predetermined voltage to be equal to or smaller than a predetermined value, the induced voltage being generated in the armature winding based on rotation of the rotor, the predetermined voltage being applied to the armature winding; A second manipulation unit that manipulates, as control for a second region that is larger than the first region, the field current such that the controlled variable is controlled to the target value.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: October 16, 2018
    Assignee: DENSO CORPORATION
    Inventor: Kiyoshi Fujii
  • Patent number: 10023055
    Abstract: A rotational speed command output unit receives and outputs a command value of a motor rotational speed inputted from outside. A PWM duty calculator calculates a PWM duty based on the command value and an actual rotational speed of a motor. A maximum speed estimator estimates, based on the actual rotational speed measured, a parameter representing a controlled state of the motor, a current PWM duty and a predetermined upper limit of the PWM duty, a maximum rotational speed of the motor to be reached under PWM control with the upper limit of the PWM duty. The command value inputted from outside is restricted not to exceed the maximum rotational speed. In this way, when a motor is PWM-controlled, abrupt changes in the rotational speed of the motor due to supply voltage fluctuations can be suppressed.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: July 17, 2018
    Assignee: DENSO CORPORATION
    Inventor: Hideo Sawaoka
  • Patent number: 10027267
    Abstract: A power system includes an integrated drive generator (IDG) including an exciter field winding. A generator control unit (GCU) includes exciter drive circuit configured to electrically energize the exciter field winding, and a main stator configured to output voltage to at least one electrical load. The exciter drive circuit includes a dynamic flyback unit configured to selectively operate the exciter drive circuit between a first mode and a second mode different from the first mode based on a change in the at least one electrical load.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: July 17, 2018
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventor: Adrian E. Vandergrift
  • Patent number: 9960722
    Abstract: A motor controller which controls a switched reluctance motor (hereinafter referred to as a motor) includes an inverter, a torque computation part, a magnetic flux computation part, and a switching control unit. The switching control unit controls the inverter by using at least a reference torque, which is a torque command value, and a calculated torque. The switching control unit includes a minimum magnetic flux maintenance part. The minimum magnetic flux maintenance part controls the inverter such that a calculated phase magnetic flux of each phase becomes equal to or larger than a predetermined minimum value in a state where the rotational speed of the motor is above a predetermined speed.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: May 1, 2018
    Assignee: NIDEC CORPORATION
    Inventor: Yuichi Takano
  • Patent number: 9960720
    Abstract: A system and method for controlling a multiphase electric motor fitted to a motor vehicle. The motor includes a rotor powered by a voltage chopper or a rotor with permanent magnets and a stator powered by a multiphase voltage inverter. The multiphase voltage inverter is powered via a high-voltage DC bus. The control system receives as an input a torque setpoint of an electric-vehicle computer. The system also includes a system for the dynamic control of the torque setpoint to determine a dynamic correction of torque ripple and a device for determining setpoints for powering the electric motor as a function of the torque setpoint and of the dynamic correction of torque ripple.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: May 1, 2018
    Assignee: RENAULT s.a.s.
    Inventor: Thanh Nguyen
  • Patent number: 9762155
    Abstract: Low speed and high speed estimates of rotor angle and speed (LS_?_EST/LS_?_EST and HS_?_EST/HS_?_EST) relative to the stator are received from a low speed estimator and a high speed estimator, respectively. LS_?_EST and a subset of torque-controlling I_Q trajectory curve (“IQTC”) parameter values appropriate to low speed rotor operation are selected for rotor speeds below a low speed threshold value ?_LOW_THRS. HS_?_EST and a subset of IQTC curve parameter values appropriate to high speed rotor operation are selected for rotor speeds above a high speed threshold value ?_HIGH_THRS. LS_?_EST and the low speed subset of IQTC parameter values remain selected for rotor speeds less than ?_HIGH_THRS after accelerating to a rotor speed greater than ?_LOW_THRS. HS_?_EST and the subset of high speed IQTC parameter values remain selected for rotor speeds greater than ?_LOW_THRS after decelerating to a rotor speed less than ?_HIGH_THRS.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: September 12, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: David Patrick Magee, Eric James Thomas
  • Patent number: 9735723
    Abstract: A method to control the rotor position in a reluctance motor includes: energizing a phase winding to an energized state so as to move a rotor relative to a stator; switching the phase winding between the energized state and a freewheeling state over a pulsing period to produce a plurality of phase current pulses wherein the phase current freewheels in the freewheeling state over a freewheeling period of each current pulse; sampling rates of change of phase current and amplitudes of phase current during a plurality of freewheeling periods; de-energizing the phase winding; and computing the angular position of the rotor.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: August 15, 2017
    Assignee: Perkins Engines Company Limited
    Inventors: John Rutledge, Stephen Watkins
  • Patent number: 9722465
    Abstract: A tooth of a stator has a tapered shape in which a tooth width decreases toward a distal end portion thereof. A winding is formed of an edgewise winding wound around the tooth in a row. The winding is supplied with power so that a terminal on a base portion side of the tooth may have a higher voltage than that of a terminal on the distal end portion side thereof. A tooth width Th of the base portion is set within the range of Tmin<Th<1.25Tha defined by a tooth width Tha that maximizes an index using an outer radius and a core back width of a stator core, a clearance of the windings in the slot, a winding width, an air gap between the teeth and the winding, a pitch of the slot, and an inclination angle of the winding, and a permissible lower limit Tmin.
    Type: Grant
    Filed: June 4, 2013
    Date of Patent: August 1, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Moriyuki Hazeyama, Hideaki Arita, Yoshihiro Miyama, Akihiro Daikoku
  • Patent number: 9611932
    Abstract: When initial drive control for an actuator driving a shift switch mechanism is completed, a P-ECU determines whether an IG signal is received. In the case where the P-ECU has not received the IG signal at the time when the initial drive control is completed, the P-ECU temporarily keeps the actuator in a state where the initial drive control is completed. In the case where the P-ECU receives the IG signal in the period from completion of the initial drive control to the time when a predetermined time T2 has elapsed since completion of the initial drive control, the P-ECU executes P wall press control when the P-ECU receives the IG signal.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: April 4, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahiko Tsutsumi, Ichiro Kitaori, Koki Ueno, Keisuke Sekiya, Toshinari Suzuki
  • Patent number: 9602028
    Abstract: An apparatus and a method actuate a frequency converter of an electric machine having a safety function, in particular a safe-torque-off (STO) function. Wherein, by a preferably clocked converter circuit, an electrically isolated output voltage is generated from an input voltage, from which output voltage a control signal is generated for the frequency converter for the operation thereof in accordance with standards and for triggering the safety function. An actuation signal is generated for a semiconductor switch which is periodically connected to the input voltage, and the output voltage is limited when the output voltage exceeds a switching threshold.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: March 21, 2017
    Assignee: Baumueller Nuernberg GmbH
    Inventors: Uwe Hensel, Magdi Dimas-Zekri, Axel Helmerth
  • Patent number: 9595903
    Abstract: A controller is provided which can interface with a variable frequency drive and a motor, the controller having (a) one or more voltage and current sensors which can interface with a power line linking the variable frequency drive and the motor; and (b) a signal interface module which can receive electrical signals associated with an operating condition of the motor from the one or more voltage and current sensors. The signal interface module can correlate the received electrical signals with a rotor position of the motor, and transmit signals corresponding to rotor position, to the variable frequency drive. The data provided by the controller if conveyed as a rotor position, may cause the variable frequency drive to change one or more of its operating parameters to maintain proper synchronization of the rotor and its associated stator currents. Alternatively, the controller may directly control variable frequency drive operating parameters.
    Type: Grant
    Filed: March 20, 2015
    Date of Patent: March 14, 2017
    Assignee: General Electric Company
    Inventors: Nathaniel Benedict Hawes, David Allan Torrey
  • Patent number: 9590458
    Abstract: A rotor for an electrical machine including a plurality of pole sections with adjacent poles within each of the pole sections being distanced by a first uniform pole pitch. Adjacent poles belonging to different pole sections are distanced by a second (smaller) pole pitch at one end of each pole section, and by a third (larger) pole pitch at the other end of each pole section. Alternatively, a corresponding adjustment of coil pitches can be done in a stator of an electrical machine.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: March 7, 2017
    Assignee: ABB Research Ltd.
    Inventors: Robert Chin, Juhani Mantere
  • Patent number: 9590540
    Abstract: A system or method controlling a variable speed drive based on PWM techniques, wherein a first PWM method is used when the input current is less than a predetermined threshold value, for higher efficiency and lower total harmonic distortion (THD); and a second PWM method comprising a discontinuous modulation signal is used when the input current is greater than the predetermined threshold value for higher efficiency. By doing so, the maximum efficiency of VSD within the whole operation range can be achieved.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: March 7, 2017
    Assignee: Johnson Controls Technology Company
    Inventors: Zhiqiao Wu, Ajit W. Kane, Shreesha Adiga-Manoor
  • Patent number: 9577555
    Abstract: At least one example embodiment discloses a method of estimating a position of a rotor in a motor. The method includes obtaining a current regulation quality index based on a current command and a measured current, determining an estimated position of the rotor based on the current regulation quality index and position estimation data and controlling the motor based on the estimated position of the rotor.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: February 21, 2017
    Assignees: DEERE & COMPANY, THE BOARD OF REGENTS OF THE UNIVERSITY OF NEBRASKA
    Inventors: Long Wu, Yue Zhao, Wei Qiao
  • Patent number: 9577556
    Abstract: A motor controller coupled to a motor is provided. The motor controller is configured to transmit a first instruction to the motor to perform a first start attempt utilizing at least one parameter in a first set of parameters. The motor controller is additionally configured to receive feedback associated with the first start attempt from the motor, and transmit, in response to the feedback, a second instruction to the motor to perform a second start attempt utilizing at least one parameter in a second set of parameters, wherein the second set of parameters differ from the first set of parameters.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: February 21, 2017
    Assignee: Regal Beloit America, Inc.
    Inventors: Gregory P. Sullivan, Bryan J. Stout, Brian L. Beifus, Aldo Sebastian Bertoncini, Michael R. Koller
  • Patent number: 9577553
    Abstract: The invention relates to a drive arrangement for the motor-operated adjustment of an adjusting element in a motor vehicle, wherein the drive arrangement comprises two electrical drives having in each case a drive motor and a control device, wherein in the assembled state the drives act in the same manner on the adjusting element and are embodied in an essentially identical manner apart from deviations that are a result of tolerances, wherein the control device influences the two drive motors by a pulse width modulation voltage (“PWM” voltage). It is proposed that the control device influences the two drive motors by PWM voltages having PWM switching frequencies that vary continuously during the adjustment process in such a manner that the PWM switching frequencies that are allocated to the two drive motors are different from each other at least for periods of time.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: February 21, 2017
    Assignee: Brose Fahrzeugteile GmbH & Co. KG, Hallstadt
    Inventors: Juergen Eggeling, Dirk Hellmich, Klaus Duenne
  • Patent number: 9543872
    Abstract: A control method for a switched reluctance generator employing dual switched-mode power converters does not require a position sensor. In the excitation stage, the upper tube and lower tube of the main switch of a phase in the power converter are switched on, and the phase current is detected. When the phase current rises to a preset threshold, the upper tube or lower tube of the main switch of the phase is switched off, changing the phase of the switched reluctance generator into a zero voltage natural freewheeling state. When the phase current drops to the valley value, the rotor position is the end position of maximum phase inductance of the phase. This rotor position is used as the switch-off position of the main switch of the phase of the switched reluctance generator, and the upper tube and lower tube for the main switch of the phase are switched off.
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: January 10, 2017
    Assignee: China University of Mining and Technology
    Inventor: Hao Chen
  • Patent number: 9543876
    Abstract: A brushless, three phase wound field synchronous machine (WFSM) provides an electromechanical power transfer system wherein it may serve as both a starter and a generator. Power for the excitation system of the WFSM is provided by a three phase flux switching generator (FSG). The three phase FSG also provides position sensor functionality for the WFSM when the WFSM operates in the starter/motor mode.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: January 10, 2017
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Dhaval Patel, David A. Fox, Jason A. Ohnemus, Albert L. Markunas
  • Patent number: 9482867
    Abstract: A method and apparatus for compensating for hysteresis in a system, the method comprising: determining a required input to the system from an output of the system using the Preisach model with the input of the Preisach model corresponding to the output of the system, and with the output of the Preisach model corresponding to the input of the system. The system may be an adaptive optics system. The input x may be an input voltage of an actuator that deforms a mirror, and the output y may be a value of a displacement of a mirror.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: November 1, 2016
    Assignee: BAE SYSTEMS plc
    Inventors: Michael Stewart Griffith, Imdad Sajjad Badruddin Sardharwalla
  • Patent number: 9476430
    Abstract: The disclosure relates to a method for operating a positioning actuator system with an electronically commutated actuator drive for driving an actuator element, having the following steps: non-volatile storage of a position information item of the actuator element or of a rotor of the actuator drive which was detected last as a reference position before the positioning actuator system is switched off; in the case of switching on of the positioning actuator system retrieval of the reference position and actuation of the actuator drive by energizing the actuator drive in accordance with a space phasor which is dependent on the reference position. The object is to make available an improved method for releasing blockage of an actuator element or actuation after activation of a motor system with a maximum actuating torque. For positioning actuators with commutated motors such as, for example, synchronous motors.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: October 25, 2016
    Assignee: Robert Bosch GmbH
    Inventors: Ingo Immendoerfer, Alex Grossmann, Udo Sieber, Ralf Buehrle, Zeynep Tosun
  • Patent number: 9473054
    Abstract: Determining an amount of rotating a vector according to a result of comparing the rotated vector with a predetermined phase and rotating the vector according to the determined amount of rotating the vector are repeated to acquire the determined amount of rotating the vector as a rotation angle of a rotation shaft. Based on the thus acquired amount of rotating the vector, a rotation angle change signal is generated for acquiring a state of a change of the rotation angle of the rotation shaft. A signal indicating to increase or decrease a fixed amount is generated for increasing or decreasing the amount of rotating the vector according to the result of the comparison.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: October 18, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventor: Fumihiro Shimizu
  • Patent number: 9431940
    Abstract: A motor control apparatus includes a supply unit to supply a current for excitation to a plurality of coils of a motor, a first detection unit to detect a physical quantity which varies depending on a change in inductance of at least one of the plurality of coils, and a determination unit to determine a rotational position of a rotor of the motor. A control unit controls the rotational position of the rotor of the motor based on a determination result by the determination unit, and a second detection unit detects an inducted voltage of each of the plurality of coils. The determination unit also determines the rotational position of the rotor based on the detected physical quantity when the rotor is at rest and when a rotational speed of the rotor is smaller than or equal to a predetermined value, and determines the rotational position of the rotor based on the detected induced voltage when the rotational speed of the rotor is greater than the predetermined value.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: August 30, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Shigeru Kameyama
  • Patent number: 9385641
    Abstract: System and method for initiating rotation of a rotor in a motor. The motor may include the rotor and a plurality of pairs of electromagnets. A rotation period may be determined. One or more pairs of electromagnets of the plurality of pairs of electromagnets may be excited at a first excitation level. The excited one or more pairs of electromagnets may be determined based on the rotation period. The excitation level may be decreased, over a first period of time, to a second excitation level. The second excitation level may be a lower excitation level than the first excitation level. The excitation level may be increased, over a second period of time, to a third excitation level. The third excitation level may be a higher excitation level than the second excitation level. The rotation period may be decreased over the first and second periods of time.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: July 5, 2016
    Assignee: STANDARD MICROSYSTEMS CORPORATION
    Inventors: Lynn R. Kern, James P. McFarland
  • Patent number: 9325260
    Abstract: In a butting control, while performing a constant current control for a motor based on an output of a current sensor, the motor is driven by sequentially switching over a current supply phase of the motor in a one-phase current supply method, in which only one of the phases of the motor is powered. By performing the constant current control in the butting control, changes in a current value of each phase caused by temperature changes or aging changes is suppressed and hence a torque change of the motor is suppressed. In addition, by sequentially switching over the current supply phase of the motor in the one phase current supply method under the constant current control, a torque change of the motor can be suppressed while maintaining the current value of the current supply phase at a constant value.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: April 26, 2016
    Assignee: DENSO CORPORATION
    Inventor: Jun Yamada
  • Patent number: 9297636
    Abstract: The present invention relates to a resolver of an electric driving motor for vehicle which comprises a rotor, a stator comprising a stator main body which encircles the rotor and teeth which extend from the stator main body to be wound by a coil, a terminal module comprising a terminal end which contacts the coil for an electric connection and a terminal main body which supports the terminal end, and a connector module comprising a connector main body which is detachably coupled to the terminal main body and a lead line which is connected to an outer device and supported by the connector main body and which contacts the terminal end for an electric connection if the connector main body is coupled to the terminal main body, thus simplifying manufacturing process and repairing process and reducing cost.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: March 29, 2016
    Assignee: Daesung Electric Co., Ltd.
    Inventors: Hong-chan Eom, Yeong-sik Kim, In-sub Shin, Gyu-ryong Choi