Responsive To Rotor Shaft Position Or Speed Patents (Class 318/721)
  • Patent number: 11048236
    Abstract: The determination of a slip constant is simplified upon driving a motor for which the slip constant is unknown, based on variation of acceleration when accelerating an induction motor from start up to a predetermined speed. A parameter determination support device for motor driving includes: an automatic measurement part which automatically measures characteristic information including a speed during acceleration and acceleration upon driving an induction motor to accelerate from start up to a predetermined speed set in advance which is no more than a base speed of the induction motor, relative to each slip constant, based on a plurality of slip constants set in advance; and an estimation part which estimates, as a slip constant of the induction motor, a slip constant having the smallest variation in acceleration, among a plurality of slip constants, based on the characteristic information.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: June 29, 2021
    Assignee: FANUC CORPORATION
    Inventors: Kouki Oikawa, Yuuki Morita, Tadashi Okita
  • Patent number: 10965188
    Abstract: The present disclosure relates to a mechatronic actuator consisting of a housing incorporating a shell and a three-phase electric motor formed by a stator excited by electrical coils and by a magnetized rotor, driving an output shaft by means of a gear train, the axis of the rotor, the axis of the output shaft and the axes of the intermediate toothed wheels being parallel, the stator having a radial triangular star shape, the three wound poles forming the three branches of the star, the axes of symmetry of two consecutive wound poles forming a mechanical angle of 120°, the housing also incorporating an electronic circuit, including a capacitor for filtering the electrical signal, the shell having a longitudinal axis, characterised in that the stator is positioned in the hosing in such a way that the axis of symmetry of one of the three wound poles forms an angle of between 70 and 110° with the longitudinal axis.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: March 30, 2021
    Assignee: MMT AG
    Inventors: Mathieu Watrin, Anthony Mellere
  • Patent number: 10951148
    Abstract: A control apparatus of a synchronous motor with a load commutated inverter includes a positive/negative judgment unit for discriminating positive/negative of the motor voltage of each phase of the three-phase AC input of the synchronous motor, an estimated phase setting unit for calculating and setting the estimated phase of the motor voltage based on the discrimination result by the positive/negative discrimination unit, and a speed estimation unit for estimating the speed of the synchronous motor by integrating the change of the estimated phase by a predetermined number of times and dividing the integrated result by the product of the predetermined number and the operation cycle. When driving the synchronous motor with the load commutated inverter, in a condition the synchronous motor slips at high speed, restart is made easier.
    Type: Grant
    Filed: July 22, 2019
    Date of Patent: March 16, 2021
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventor: Takumi Ito
  • Patent number: 10931213
    Abstract: A drive control unit that performs vector control of a synchronous motor determines reference phase angles of 3-phase/DQ converters, and a DQ/3-phase converter. When speed of a synchronous motor is equal to or higher than a predetermined threshold value, the reference phase angle is obtained by adding a correction angle such that D-axis voltage feedback output from 3-phase/DQ converter becomes zero to the detection angle of a position detector. And when the speed of the synchronous motor is less than a predetermined threshold value, the reference phase angle is obtained by adding a low speed load angle set in advance to the detection angle of the position detector. In a vector control operation, a power factor is achieved by controlling the D-axis current to be zero.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: February 23, 2021
    Assignee: Toshiba Mitsubishi-Electric Industrial Systems Corporation
    Inventors: Fumio Watanabe, Masashi Nakamura
  • Patent number: 10879822
    Abstract: In order to achieve the energy efficiency class IE4 defined in IEC standard 60034, it is necessary to operate permanent-magnet synchronous machines directly from the supply system. Since this is not readily possible, soft-starting devices come into consideration as cost-effective solutions. The problem of transmitter-free running up can be split into two component problems: determining the initial rotor angle and running up the machine. The present invention describes a (rotary) transmitter-free starting method with which the motor can be started using a soft-starting device.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: December 29, 2020
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Hauke Nannen, Heiko Zatocil
  • Patent number: 10855212
    Abstract: The present invention addresses the problem of providing a method for detecting magnetic field location which can realize low cost by using simple hardware and software and can detect a rotor location in units of excitation sections in 120°-energization without generating sensing noise at the time of initiation. As a solution, an MPU (51) obtains, through calculation, a neutral point potential from an energization-phase voltage measured by an A/D conversion circuit (53), obtains the difference between the neutral point potential and a non-energization-phase voltage, performs magnitude comparison between the difference and a negative-side threshold value in the case where the present location is an odd-numbered section or between the difference and a positive-side threshold value in the case where the present location is an even-numbered section, and determines the end point of the 60°-energization section when the difference exceeds a threshold value in a direction away from the neutral point potential.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: December 1, 2020
    Assignee: HOKUTO CONTROL CO., LTD.
    Inventor: Kiyoshi Yamamoto
  • Patent number: 10830918
    Abstract: A magneto-inductive transmit antenna is provided that includes a shield formed of a magnetic material, a magnetic field source mounted on a first side of the shield, and a coil wrapped around the shield to define a number of turns. The coil is configured to conduct a current therethrough. The magnetic material is configured to exhibit a change in permeability based on the current conducted through the coil when the current is conducted through the coil. The change in permeability is configured to modulate a magnetic field of the magnetic field source. The magnetic field is modulated relative to a second side of the shield opposite the first side when the permeability is changed.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: November 10, 2020
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Nathan Daniel Strachen, Nader Behdad, John H. Booske
  • Patent number: 10730515
    Abstract: A method of operating an auto-braking system of a vehicle in coordination with operation of a speed limiting system (SLS) of the vehicle to prevent undesired loss of auto-braking functionality. If: a) a driver input of an engine power control parameter (such as throttle setting) exceeds an activation threshold of the SLS so that the SLS is therefore limiting vehicle speed to a set-speed corresponding to the activation threshold; and b) the driver input of the power control parameter is below a SLS override threshold; and c) the SLS override threshold exceeds an auto-braking override threshold for the power control parameter; then the auto-braking override threshold is increased to at least equal the SLS override threshold. The speed limiter activation threshold may be determined from speed limit information supplied by a vehicle navigation system of by an image evaluating unit from images obtained by a camera of the vehicle.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: August 4, 2020
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Gregor Allexi, Daniel Blickheuser, Florian Schweter
  • Patent number: 10644638
    Abstract: The purpose of the present invention is to provide an electric motor system such that loss of synchronism of an inverter-driven synchronous motor with no magnetic pole position sensor can be easily detected. In order to achieve the purpose, the present invention pertains to an electric motor equipped with a synchronous motor, an inverter having a power conversion device for driving the synchronous motor, and a load connected to the synchronous motor, and is configured such that loss of synchronism of the synchronous motor is determined on the basis of a direct-current voltage in the power conversion device.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: May 5, 2020
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Tomofumi Okubo, Toshio Tomita
  • Patent number: 10608567
    Abstract: A propulsion system for a device having an electric motor configured to selectively provide a first torque contribution to propel the device. At least one sensor is configured to obtain a respective signal related to the electric motor. A controller is in communication with the sensors and configured to determine a magnet flux linkage (?m) based in part on the respective signal. The controller has a processor and tangible, non-transitory memory on which instructions are recorded for a method of determining a demagnetized torque capability (TD) for the electric motor in real-time. In the event of a threshold level of demagnetization of the electric motor, the method estimates the torque capability in real time of the electric motor, taking the demagnetization level into account. At least one operating parameter of the device is controlled based at least partially on the demagnetized torque capability (TD).
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: March 31, 2020
    Assignee: GM Global Technology Operations LLC
    Inventors: Dwarakanath V. Simili, Siddharth Ballal
  • Patent number: 10566924
    Abstract: A motor-driven integrated circuit comprises a PWM output unit and an overcurrent comparator coupled with the PWM output unit. The overcurrent comparator receives a detection signal and compares the detection signal with a reference value. When the detection signal is larger than the reference value, the overcurrent comparator outputs an overcurrent protection signal to control the PWM output unit enter an overcurrent protection mode.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: February 18, 2020
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Chiping Sun, Qiubao Wang, Ken Wong, Enhui Wang, Haibo Jiang, Yunlong Jiang
  • Patent number: 10554155
    Abstract: A control method for verifying the compatibility between an input filter and a variable speed drive. The method includes applying a plurality of successive commands so as to define a plurality of operating points of the electric motor, for each operating point, measuring the DC voltage of the bus, comparing the maximum variation in the amplitude of the DC voltage measured for the operating point with a threshold value, defining a new operating point as long as the maximum variation in the amplitude of the DC voltage is lower than the threshold value, determining an operating range including all of the operating points for which the maximum variation in the amplitude of the DC voltage is lower than the threshold value.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: February 4, 2020
    Assignee: SChneider Toshiba Inverter Europe SAS
    Inventors: Francois Malrait, Mehdi Messaoudi
  • Patent number: 10469000
    Abstract: The synchronous machine module includes a synchronous machine and a rotational speed controller for controlling a rotational speed of the synchronous machine, which rotational speed controller has a detector for detecting a variable which is formed by the effective power or is dependent thereon. The rotational speed controller is designed to set the rotational speed of the synchronous machine and/or the time profile thereof as a function of the detected variable and/or its time profile. The vehicle drive has such a synchronous machine module and a power generator, which in order to supply the synchronous machine module is connected thereto. The vehicle is, in particular, an aircraft and has such a vehicle drive and/or such a synchronous machine module.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: November 5, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventors: Christian Bachmann, Dominik Bergmann, Marco Cyriacks, Guillaume Pais, Lason Vittorias
  • Patent number: 10439535
    Abstract: This invention is concerning a control device of an AC rotating machine that estimates, as an estimated rotational position, a rotational position of an AC rotating machine having N sets of three-phase windings where N is a natural number equal to or greater than 2, the device being made up of: a voltage sum calculator that calculates a voltage sum from N sets of voltage commands for applying AC voltage to the N sets of three-phase windings; a current sum calculator that calculates a current sum from N sets of currents respectively flowing in the N sets of three-phase windings; and a rotational position estimator that calculates an estimated rotational position on the basis of calculation results of the voltage sum calculator and the current sum calculator.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: October 8, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tatsuya Mori, Shunsuke Nakajima, Isao Kezobo
  • Patent number: 10387610
    Abstract: In order to more appropriately select a configuration of a linear motor, a motor configuration selection device includes a specification information acquisition unit that acquires information on specifications of components of a linear motor; a compatibility condition setting unit that sets a compatibility condition for an intended device configuration the linear motor; an evaluation result acquisition unit that acquires an evaluation result for each device configuration of the linear motor that is compatible with the compatibility condition on the basis of preset criteria; and a candidate presentation unit that presents, on the basis of the evaluation result, information on a candidate device configuration for selecting the device configuration of the linear motor.
    Type: Grant
    Filed: June 21, 2018
    Date of Patent: August 20, 2019
    Assignee: FANUC CORPORATION
    Inventor: Suguru Takamizawa
  • Patent number: 10374533
    Abstract: Techniques to sense the direction of current through the power transistor of an inverter drive circuit and the position of the rotor for a brushless direct current (BLDC) motor. During the time demagnetizing current flows, the power transistor is turned ON, directing the demagnetizing current through the lower impedance transistor channel rather than through the body diode. Directing current to the transistor channel may reduce the diode losses in the power transistors, thereby reducing the overall power losses. In other examples, the low side as well as the high side power transistor may be turned on during the time the demagnetizing current flows through the given power transistor.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: August 6, 2019
    Assignee: Infineon Technologies Austria AG
    Inventors: Venkata Anand Prabhala, Vatche Oknaian, Kapil Kelkar
  • Patent number: 10370960
    Abstract: A method for reducing noise at a wellsite includes transmitting a plurality of first signals from a variable frequency drive (VFD) to an alternating current (AC) induction motor. A timing of a plurality of second signals is varied to control transistors in an inverter of the VFD, thereby reducing harmonic distortion of the first signals output from the VFD. The timing is varied based at least partially upon an estimation of the harmonic distortion.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: August 6, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: Jacques Orban
  • Patent number: 10340824
    Abstract: A motor-driven integrated circuit comprises a plurality of position comparators, a timer and a central processing. Each of the plurality of position comparators receives a pole detection signal denoted a position of a rotor of a motor. The timer receives a timing interrupt signal output by the plurality of position comparators when a predetermined edge of the pole detection signal is generated and records a time of the predetermined edge. The central processing unit obtains a rotation speed of the motor according to a time difference between two predetermined edges.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: July 2, 2019
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Chiping Sun, Qiubao Wang, Ken Wong, Enhui Wang, Haibo Jiang, Shujuan Huang
  • Patent number: 10322815
    Abstract: A system for providing alternating current (AC) power to an aircraft component includes a ram air turbine (RAT) configured to generate AC power. The system also includes an energy storage device configured to output direct current (DC) power. The system also includes an inverter configured to convert the DC power to the AC power. The system also includes a controller coupled to the RAT and the inverter and configured to cause the inverter to provide the AC power to the aircraft component, and to control the RAT to provide the AC power to the aircraft component in response to determining that the RAT can provide the AC power.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: June 18, 2019
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Scott J. Marks, William E. Seidel
  • Patent number: 10090796
    Abstract: A vibration conformance compensation device includes a linear motor including a vibrator and a coil, a signal generator connecting with the linear motor electrically and outputting a drive signal for driving the linear motor to vibrate, a working parameter feedback module, a processing module connecting having a target vibration state value which is set in the linear motor in advance for comparing the real-time vibration state parameters of the linear motor with the target vibration state value to obtain the comparison result, and a signal conditioning module connecting with the processing module and the signal generator electrically and adjusting the drive signal in accordance with the comparison result to make the vibration state of the linear motor consistent with the target vibration state.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: October 2, 2018
    Assignee: AAC Technologies Pte. Ltd.
    Inventors: Huan Ge, Rongguan Zhou
  • Patent number: 10077673
    Abstract: A method for monitoring operation of a power generating installation that has at least one generator that is driven by a rotating machine, in which values of an operating parameter of the generator and/or rotating machine are captured and stored, it is ascertained whether the value of the operating parameter at prescribed checking times lies outside an admissible range, wherein a possible fault is inferred if the value of the operating parameter lies outside the admissible range at two directly successive checking times, an additional check is performed to determine whether the value of the operating parameter is approaching the admissible range in a prescribed checking interval that lies between two directly successive checking times and particularly extends as far as the later of the two checking times, and it is inferred that there is a fault if the value of the operating parameter is not approaching the admissible range.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: September 18, 2018
    Assignee: Siemens Aktiengesellschaft
    Inventor: Dirk Wall
  • Patent number: 10075118
    Abstract: Controllers for controlling hybrid motor drive circuits configured to drive a motor are provided herein. A controller is configured to drive the motor using an inverter when a motor commanded frequency is not within a predetermined range of line input power frequencies, and couple line input power to an output of the inverter using a first switch device when the motor commanded frequency is within the predetermined range of line input power frequencies.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: September 11, 2018
    Assignee: Regal Beloit America, Inc.
    Inventors: Ludovic Andre Chretien, Roger Carlos Becerra, Kamron Mark Wright, Lester Benjamin Manz
  • Patent number: 9995302
    Abstract: A motor-driven compressor includes an electric motor, a drive circuit, a modulation method controller, a temperature measuring section, a high-temperature (HT) stop controller, and a high-temperature (HT) stop temperature setting section. The high-temperature (HT) stop controller stops the electric motor when the temperature measured by the temperature measuring section is higher than or equal to a predetermined high-temperature (HT) stop temperature. When the modulation method is the three-phase modulation, the HT stop temperature setting section sets the HT stop temperature to a three-phase high-temperature (HT) stop temperature. When the modulation method is the two-phase modulation, the HT stop temperature setting section sets the HT stop temperature to a two-phase high-temperature (HT) stop temperature, which is higher than the three-phase HT stop temperature.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: June 12, 2018
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Junya Yano, Tsuyoshi Yamaguchi, Takashi Kawashima, Yoshiki Nagata
  • Patent number: 9793838
    Abstract: A method includes measuring a speed of a motor, determining a phase angle of a motor voltage relative to a motor current based on the measured speed of the motor, adjusting a profile of the motor voltage by the determined phase angle, and generating a profile of a drive voltage based on the adjusted profile of the motor voltage and a back-EMF profile. An apparatus includes a motor, and a driver circuit. The driver circuit measures a speed of the motor, determines a phase angle of a motor voltage relative to a motor current based on the measured speed of the motor, adjusts a profile of the motor voltage by the determined phase angle, and generates a profile of a drive voltage based on the adjusted profile of the motor voltage and a back-EMF profile.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: October 17, 2017
    Assignee: MARVELL INTERNATIONAL LTD.
    Inventor: Yichao Wang
  • Patent number: 9768712
    Abstract: A power conversion device includes: a power converter to perform output to an output line connected to a single-phase power system; and a control device to control the power converter so it operates as a virtual synchronous generator. The control device includes: a voltage and current measurer to obtain, from a single-phase system voltage, an angular velocity and a phase of the system voltage by an estimation operation that uses the phase of the system voltage as a parameter; a power obtainer to obtain active power and reactive power; a governor model to calculate a phase difference; an AVR model to calculate an absolute value of an induced voltage of a virtual synchronous generator; a generator model to calculate current command values corresponding to an armature current of the virtual synchronous generator; and a current controller to generate and output a PWM signal to the power converter.
    Type: Grant
    Filed: February 16, 2015
    Date of Patent: September 19, 2017
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Kenichi Sakimoto, Yuko Hirase, Eiji Yoshimura, Shogo Katsura, Hidehiko Nakagawa, Osamu Noro, Yuji Shindo
  • Patent number: 9712095
    Abstract: A first active part of a poly-phase electric machine is connected to a converter having a control facility. The control facility updates a base commutation angle using the target speed value and determines direct-axis and quadrature-axis component values of currents and a commutation angle supplied to the machine. Target and component quadrature-axis values are provided to a quadrature-axis portion of a current controller that determines a target value of the quadrature-axis voltage component. Target and component current values are supplied to a direct-axis portion of the current controller, which determines a target value of the direct-axis voltage component therefrom. The target value of the direct-axis and quadrature-axis voltage components and the commutation angle are used to determine the target output voltages provided to the converter. A damping commutation angle determined using target values of the quadrature-axis and direct axis voltage components is used to adjust the of the voltage.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: July 18, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Daniel Bönke, Michael Jäntsch, Stefan Künzel, Carsten Spindler
  • Patent number: 9695820
    Abstract: A compressor capable of reducing oil foaming and reducing the waiting time taken until the heating of the compressor is completed, and a method of controlling the same, the method of controlling a compressor including sensing temperature of the oil in the compressor, if the temperature of the oil is below a reference temperature, performing a loss operation, in which an amount of heat radiation of the motor part is increased, while operating the motor part at a low speed, and if the temperature of the oil increases to be equal to or higher then reference temperature, performing an efficiency operation by converting an operation of the motor to a normal operation.
    Type: Grant
    Filed: April 17, 2013
    Date of Patent: July 4, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Joon Hwan Lee, Kyoung Rock Kim, Byoung Guk Lim
  • Patent number: 9654043
    Abstract: An apparatus for controlling a temperature change in a motor may include a rotor resistance estimator calculating a rotor resistance estimation value of the motor utilizing a DQ-axis voltage command value and a coordinate conversion DQ-axis current value, a synchronous angle estimator estimating a synchronous angle utilizing the rotor resistance estimation value, a rotor angular velocity of the motor and a DQ-axis current command value, a coordinate converter creating the coordinate conversion DQ-axis current value utilizing the synchronous angle and a sensing current value, a current controller creating the DQ-axis voltage command value utilizing the DQ-axis current command value and the coordinate conversion DQ-axis current value, and a power conversion unit converting the power according to the DQ-axis voltage command value and supplying the converted power to the motor.
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: May 16, 2017
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventor: Sang-Min Kim
  • Patent number: 9628016
    Abstract: In a system that receives power from an electric power grid, a variable frequency AC drive has an output connected to an AC electric motor, and an input connected to the power grid. The motor is in 1 connection with a load, and the AC drive includes an active converter having a predetermined maximum apparent power capacity. The converter is coupled to a controller programmed to regulate reactive power generation and consumption of the variable frequency AC drive so that the drive produces reactive power when the converter is utilizing less than its maximum apparent power capacity. This reactive power is fed to the power grid. A device monitors current and voltage in the power grid and calculates power factor, which is then used as a feedback to an external controller that generates a reactive power reference signal intended to control the system's power factor.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: April 18, 2017
    Inventors: Craig Lamascus, Lloyd Wentworth
  • Patent number: 9509132
    Abstract: A switching device includes an energy store and a measuring device connected to a control apparatus. The energy store is connected in series between the supply connection and the power supply. The control apparatus can monitor the energy supply of the switching device in the area between the supply connection and the power supply taking place via the supply connection via the measuring device. If the energy supply monitored by the measuring device falls into a critical range, and using the energy from the energy store: the control apparatus connects the semiconductor switch in an electrically conductive manner and then opens the second switch; and subsequently switches the semiconductor switch to an electrically non-conductive state and then opens the first switch.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: November 29, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Andreas Fritsch, Stefan Gruber, Hubert Kuhla
  • Patent number: 9509239
    Abstract: A rotating electric machine control system has a power control unit (PCU) and a control section separately disposed therein. The apparatus receives a trigger signal from a communicator of the PCU via a trigger communication line from an MG ECU when the MG ECU obtains electric angles from a rotation sensor. The communicator, upon receiving an input of the trigger signal, generates a communication frame that includes plural detection values from a current sensor and a voltage sensor. Then, the communicator outputs the communication frame to the MG ECU via a multiplex communication line. The MG ECU performs a preset process for a control of an inverter and a booster converter based on the detected electric angles and the communication frame matching with those electric angles.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: November 29, 2016
    Assignee: DENSO CORPORATION
    Inventor: Naoto Sakai
  • Patent number: 9502881
    Abstract: An embodiment of the invention relates to a switchgear which includes a control unit, a supply connection and a first current path. The first current path includes a first electromechanical switch and, connected in series to the first switch, a parallel connection of a second electromechanical switch to a semiconductor switch. The switchgear includes an energy accumulator and a measuring device. A control unit is capable of monitoring energy supply coming in through the supply connection. If the energy supply through the supply connection reaches a critical range, the control unit controls the output of the switching signals via the energy of the energy accumulator such that: in a first step, the semiconductor switch is switched to be electrically conducting and the second switch is then opened, and in a second step, the semiconductor switch is switched to be electrically non-conducting and the second switch is then opened.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: November 22, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Dirk Hertz, Marco Schönenberg, Johann Seitz, Stefan Zitzler
  • Patent number: 9493076
    Abstract: A rotating electric machine control system having a power control unit equipped with a voltage converter and a controller. The controller is equipped with an operation unit having a time corrector for obtaining time from first and second timers with reference to an ignition signal and correcting a relative time difference between the timers. The operation unit obtains electric angles at a preset cycle after correcting time. A communicator obtains electric currents and voltages when obtaining the electric angles for generating a communication frame, and outputs the communication frame to the operation unit via the multiplex communication line. The operation unit simultaneously performs an operation for controlling an inverter and a booster converter based on the obtained electric currents, the voltages, and the electric angles, for reducing the number of communication lines between the power control unit and the controller without compromising controllability of the voltage converter.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: November 15, 2016
    Assignee: DENSO CORPORATION
    Inventor: Naoto Sakai
  • Patent number: 9379646
    Abstract: A method is disclosed for operating a synchronous machine via a three-phase power controller including three semiconductor controllers and connected to a three-phase network.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: June 28, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Marcel Benecke
  • Patent number: 9379651
    Abstract: A method is disclosed for operating a synchronous machine by way of a three-phase AC power controller, which is connected to a three-phase network. The embodiment of the method includes determining the phase difference between the magnet-wheel voltage of the synchronous machine and the network voltage of the three-phase network; determining the rotational speed of the rotor of the synchronous machine; determining the phase position of the three-phase network; determining a decision characteristic number on the basis of a stored data table calculated in advance, which data table associates a decision characteristic number with value triples of phase difference, phase position, and rotational speed; and determining at least one switching time point on the basis of the decision characteristic number.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: June 28, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Marcel Benecke
  • Patent number: 9294029
    Abstract: A method of estimating a rotor angle of a synchronous reluctance motor, which includes a stator and a rotor. First, a stator flux and a stator current are determined. Two orthogonal stator flux components in a stator reference frame are calculated from the stator flux. Two orthogonal stator current components in the stator reference frame are calculated from the stator current. A rotor orientation vector is then calculated using a known rotor direct or quadrature axis inductance component, the stator flux components, and the stator current components. The rotor orientation is estimated on the basis of the rotor orientation vector.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: March 22, 2016
    Assignee: ABB TECHNOLOGY OY
    Inventor: Matti Veijanen
  • Patent number: 9287809
    Abstract: An inverter for generating a plurality of alternating signals to be supplied to a motor, the motor having a plurality of phases and a plurality of coils arranged at each of the plurality of phases is provided. The inverter is a motor driving inverter characterized in including a multi-level pulse-density modulator configured to modulate a signal that fluctuates periodically and controls rotation of the motor; and a plurality of switching elements configured to generate each of the plurality of alternating signals by controlling an ON/OFF of a direct current according to selection by an output signal of the pulse-density modulator.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: March 15, 2016
    Assignee: TRIGENCE SEMICONDUCTOR, INC.
    Inventors: Akira Yasuda, Jun-ichi Okamura
  • Patent number: 9236784
    Abstract: A flux-switching electric machine includes a rotor having a rotor core that is configured to rotate about a central longitudinal axis. The rotor core has a circumference that includes an approximately constant radius of curvature along an arc length of the rotor core. The rotor core includes magnetic and non-magnetic segments that are arranged in an alternating pattern of magnetic segments and non-magnetic segments along the arc length of the rotor core. The flux-switching electric machine also includes a stator having a stator core that extends a length along the central longitudinal axis. The stator core includes a stator base and stator teeth that extend radially from the stator base relative to the central longitudinal axis. The stator includes a direct current (DC) field coil wound around at least one corresponding stator tooth. The stator includes an alternating current (AC) armature coil wound around at least one corresponding stator tooth.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: January 12, 2016
    Assignee: General Electric Company
    Inventors: Tsarafidy Raminosoa, Manoj Ramprasad Shah
  • Patent number: 9184687
    Abstract: A motor control apparatus includes a calculator, a determinator, and a selector. The calculator calculates a zero vector current predicted to flow through a three-phase AC motor when an inverter operates in a first mode for applying no voltage to the motor. The determinator determines whether a difference between the zero vector current and a command current on a ?? stationary coordinate system falls within an allowable range. The selector selects the first mode as a switching mode of the inverter when the difference falls within the allowable range, and selects a second mode as the switching mode of the inverter upon determination that the difference falls outside the allowable range. The second mode corresponds to a non-zero current vector closest to the command current among six non-zero current vectors defined in fixed directions with respect to the zero vector current on the ?? stationary coordinate system.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: November 10, 2015
    Assignee: DENSO CORPORATION
    Inventor: Go Handa
  • Patent number: 9178463
    Abstract: An inverter control device is equipped with an inverter and a command value calculation unit calculates command values for the alternating current voltage output from the inverter. A phase compensation unit compensates the phase of the command values or the phase of the detected values. An inverter control unit controls the inverter on the basis of the command values or detected values that have been compensated by the phase compensation unit. A motor rotational velocity detector detects the rotational velocity of a motor. The phase compensation unit calculates the phase lead amount on the basis of a phase compensation time that is set for the purpose of obtaining a prescribed phase margin and on the basis of the rotational velocity and, in accordance with the phase lead amount, compensates the phase that is based on the specific characteristics of the motor.
    Type: Grant
    Filed: July 4, 2012
    Date of Patent: November 3, 2015
    Assignee: NISSAN MOTOR CO., LTD.
    Inventor: Mitsuhiro Shouji
  • Patent number: 9178458
    Abstract: A controller of an AC motor includes a d-axis voltage command section to generate a d-axis voltage command on a d axis of a d-q coordinate system. A d-axis non-interactive control section removes, from the d-axis voltage command, an interference component resulting from a current on a q axis of the system. A first current deviation arithmetic section obtains a deviation between a current command on the q axis and the current on the q axis flowing through the AC motor. A q-axis integral control section outputs an integral value of the deviation. A q-axis voltage command section generates a q-axis voltage command based on the deviation. A constant output control section outputs a correction voltage command based on the integral value. A d-axis voltage command correction section subtracts the correction voltage command from the d-axis voltage command after non-interactive control to correct the d-axis voltage command.
    Type: Grant
    Filed: October 3, 2013
    Date of Patent: November 3, 2015
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Akira Yamazaki, Hideaki Iura
  • Patent number: 9093941
    Abstract: A system is disclosed for controlling motor switching in a sensorless BLDC motor having a set of three stator windings. A controller unit includes a control signal generator, a memory device, a processing unit, a signal acquisition device, and an analog-to-digital converter. A power stage having a plurality of switches receives a control signal from the control signal generator and a power signal from a power source. The power stage drives two windings of the set of three stator windings with an asymmetric pulse width modulation signal and leaves one stator of the three stator windings undriven. The processing unit acquires a demodulated measured voltage on the undriven winding. The processing unit also communicates with the power stage to change which two windings of the three stator windings are driven when the demodulated measured voltage surpasses a threshold.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: July 28, 2015
    Assignee: Cirrus Logic, Inc.
    Inventors: Jason William Lawrence, Marc John Kobayashi, Stephen James Sanchez, John L. Melanson, Miroslav Olijaca
  • Patent number: 9093215
    Abstract: This disclosure provides systems, methods, and apparatus for transferring power wirelessly via a wireless power transmitter. In one aspect, the transmitter comprises a first circuit configured to generate a first signal, where the first circuit includes a first inductor. The transmitter further comprises a second circuit configured to generate a second signal out of phase with the first signal. The second circuit includes a second inductor inductively coupled with the first inductor. The first inductor and the second inductor may have a leakage inductance of at least a minimum value so as to not produce a substantially square waveform at an output of the first circuit and an output of the second circuit. The transmitter further comprises a filter circuit configured to filter the first signal and the second signal.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: July 28, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Zhen Ning Low, Scott C Hooten, Ngo Van Nguyen
  • Patent number: 9074866
    Abstract: Rotational angle measurement apparatus measuring magnetic-field angle or rotational angle with sufficient accuracy wherein a non-magnetic conductor is arranged in the vicinity of the magnetic flux generator or the magnetic sensor, even when the magnetic flux generator rotates at high speed. The rotational angle measurement apparatus is configured with a magnetic sensor 70 which responds to a magnetic-field angle and a detection unit 302 which inputs an output of the magnetic sensor. The rotational angle measurement apparatus is employed with a rotatable body 121 provided with a magnetic flux generator 202. The output of the magnetic sensor is a raw-angle signal set 155 corresponding to the magnetic-field angle. The detection unit outputs a corrected angle after a non-magnetic conductor in the vicinity of the magnetic sensor is corrected, using a correction value outputted by a correction function with rotational velocity of the rotatable body as an argument.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: July 7, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventor: Mutsumi Suzuki
  • Patent number: 9059654
    Abstract: There is provided a motor driving device including: a speed detection unit detecting a speed of a motor; a comparison unit comparing the speed of the motor detected by the speed detection unit with an external input speed; and a speed control unit outputting the reference speed as a control signal when the speed of the motor is equal to a reference speed or less and outputting a motor control signal generated based on a comparative value of the comparison unit when the speed of the motor exceeds the reference speed.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: June 16, 2015
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventor: Bon Young Gu
  • Patent number: 9054574
    Abstract: A method determines the value of a characteristic quantity (U1dc, U2dc) of a system for powering a load which includes M DC-DC converters, connected in series to the terminals of the load and at the output of a DC current power supply, and at least one storage capacitor and includes the measurement of a plurality of values of a first characteristic quantity (Ic) with a first high resolution, the measurement with a low resolution of a value of a second characteristic quantity (U1dc, U2dc), and a determination with a second high resolution of a value of the second characteristic quantity (U1dc, U2dc) from the plurality of values measured with the first high resolution of the first characteristic quantity (Ic) and from the value with the low resolution of the second characteristic quantity (U1dc, U2dc). The first and second high resolutions are at least 10 times greater than the low resolution.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: June 9, 2015
    Assignee: GE Energy Power Conversion Technology Ltd.
    Inventors: Bernard Gollentz, Régis Peron, Daniel Girod
  • Patent number: 9041326
    Abstract: A method for operating a brushless electric motor, the windings being energized by an inverter with the aid of six switches. A detection unit for detecting defective switches, a unit for measuring voltage at the outputs of the inverter, and a microcontroller for controlling the switch and for generating a pulse width modulated voltage supply for the windings are provided. A short-circuited switch causes a torque in the electric motor opposite the actuating direction of the electric motor. The method proposes that after detecting a short-circuited switch, the windings (U. V. W) are energized to generate a motor torque that is, on the whole, positive. An actuating period of the electric motor is divided into a plurality of sectors, wherein, in accordance with the defective switch, individual sectors are deactivated for the actuation of the windings (U, V, W), while other sectors are used to actuate the windings (V, W).
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: May 26, 2015
    Assignee: Continental Automotive GmbH
    Inventors: Christian Gunselmann, Mathias Fernengel, Nicolas Bruyant, Lionel Guichard, Michel Parette
  • Patent number: 9041330
    Abstract: A sensorless brushless motor control device includes a first amplification module common to all motor phases and generating an intermediary voltage signal, a voltage divider between each motor phase and a node on which the intermediary voltage signal is generated, and a computation unit. Each voltage divider generates a first corrected electromotive force with a predetermined average value. The computation unit controls the motor on the basis of the first corrected electromotive forces. By using only hardware components, the control device maintains the average of the corrected electromotive forces at the center of the analog acquisition zone of the computation unit.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: May 26, 2015
    Assignee: DASSYM SA
    Inventor: Jean-Pierre Voillat
  • Patent number: 9030141
    Abstract: There is provided a motor controlling circuit including: a hall signal level detecting unit detecting a hall signal from a hall sensor; and a signal generating unit sensing a change in a level of the hall signal to generate a motor controlling signal according to the change in the level of the hall signal, wherein the signal generating unit determines that the hall signal is maintained at a high level in a case in which a high level maintaining time of the hall signal is equal to or shorter than a preset time.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: May 12, 2015
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Bon Young Gu
  • Patent number: 9030138
    Abstract: A circuit configuration for driving an electric motor includes a signal evaluation module, which stores a number of output patterns. An input pattern is specified, and as a function of the input pattern, one of the output patterns is output, by which the electric motor is driven.
    Type: Grant
    Filed: March 17, 2011
    Date of Patent: May 12, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Thomas Wagner, Dieter Thoss, Andreas Merker