Responsive To Rotor Shaft Position Or Speed Patents (Class 318/721)
  • 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: 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: 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: 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: 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
  • 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: 9018872
    Abstract: To provide a motor control circuit that variably controls the speed of a motor, in which an appropriate advance angle value corresponding to the speed of the motor that is set can be automatically set. The motor control circuit according to the present invention includes an advance angle setting means that adds a reference advance angle value to an advance angle correction value obtained by multiplying a proportional coefficient by a correction amount and outputs an advance angle setting signal, and an advance angle setting correction means that uses a ratio of a correction reference period relative to a period of a reference signal input from the outside as a correction amount and corrects the reference advance angle value by an advance angle correction value obtained by multiplying the correction amount by a predetermined proportional coefficient of the advance angle setting means.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: April 28, 2015
    Assignees: Minebea Co., Ltd., Panasonic Corporation
    Inventors: Tomohiro Inoue, Yuji Hamada
  • Patent number: 9007013
    Abstract: Disclosed is an inverter control system and method for an eco-friendly vehicle, by which overall improvements can be obtained in terms of switching loss, electromagnetic performance, noise-vibration-harshness (NVH) performance, control stability, and so forth, when compared to a conventional case in which one fixed switching frequency and one fixed sampling frequency are used over the entire operation area. To this end, the inverter control method for an eco-friendly vehicle which generates a pulse width modulation (PWM) signal according to a switching frequency and a sampling frequency and controls ON/OFF driving of a switching element, in which a controller changes and sets the switching frequency according to a current motor speed, changes and sets a sampling frequency according to the switching frequency, and controls on/off driving of a switching element according to the switching frequency corresponding to the motor speed and the sampling frequency.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: April 14, 2015
    Assignee: Hyundai Motor Company
    Inventors: Su Hyun Bae, Won Kyoung Choi, Sung Kyu Kim, Mu Shin Kwak
  • Publication number: 20150097510
    Abstract: A motor driving device includes a control unit which outputs a pre-driving signal to control a motor based on command information of an input target number of rotations and detection information of a number of rotations of the motor, and a motor driving unit which drives the motor based on the pre-driving signal. The control unit includes a speed control circuit which outputs speed command information based on the command information of the target number of rotations and the detection information, a stop control circuit which when an input of the command information of the target number of rotations is stopped, outputs stop command information after a predetermined time elapses from detection of stop of the motor, and a driving signal generation circuit which generates a control signal based on the stop command information and the speed command information.
    Type: Application
    Filed: October 7, 2014
    Publication date: April 9, 2015
    Inventors: Keiichi KATAYAMA, Tomohiro INOUE, Shuhei NISHI
  • Patent number: 9000695
    Abstract: A sensorless control apparatus may include: a speed command unit configured to output a speed command to an electric motor; a current detector unit configured to detect electric current flowing through the electric motor if a voltage being output according to the speed command is supplied to the electric motor; a rotor angle calculation unit configured to calculate a magnetic flux of a rotor of the electric motor based on the detected electric current and the voltage being output according to the speed command, and to calculate an angle of the rotor from the calculated magnetic flux; and/or an out-of-step sensing unit configured to sense an out-of-step of the rotor according to a comparison of the calculated angle of the rotor with an angle of the rotor estimated based on a sensorless control algorithm.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: April 7, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Oh Hyuk Kwon, Young Doo Yoon, Ho Sun Yoo, So Hee Han
  • Patent number: 9000706
    Abstract: A system comprising an actuator and a controller configured to drive the actuator with a pulse width modulated (PWM) signal. The controller is configured to limit a duty cycle of the PWM signal in response to a current supplied by the PWM signal.
    Type: Grant
    Filed: January 10, 2013
    Date of Patent: April 7, 2015
    Assignee: Cummins Inc.
    Inventors: Ramakrishna Dontha, Daniel E. Boewe, Niraj Desai, Hari Donepudi, Mike Menkedick
  • Publication number: 20150084574
    Abstract: A control system included in a speed selector connected by output phases to a synchronous electric motor, the synchronous electric motor being controlled according to a control law implemented by the speed selector. A first speed of the synchronous electric motor is determined by a first speed estimator. A second speed estimator is used to determine a second speed of the synchronous electric motor. The system includes a signal generator module configured to apply, to the output phases, voltages taking account of a non-constant current signal. The second speed estimator is configured to recover the current response on the output phases, to deduce therefrom the second speed of the synchronous electric motor.
    Type: Application
    Filed: June 6, 2013
    Publication date: March 26, 2015
    Applicant: Schneider Toshiba Inverter Europe SAS
    Inventors: Olivier Defaix, Thomas Devos
  • Patent number: 8988027
    Abstract: A motor control apparatus according to the embodiment includes a rotational position estimating unit, a change amount estimating unit, and an inductance estimating unit. The rotational position estimating unit estimates a rotational position of a rotor from a motor parameter including a q-axis inductance of a motor on a basis of an output current to the motor and a voltage reference. The change amount estimating unit estimates a change amount of an output torque with respect to a current phase change of the motor corresponding to a high frequency signal whose frequency is higher than a drive frequency of the motor. The inductance estimating unit estimates an inductance value that obtains a maximum torque on a basis of the change amount as the q-axis inductance.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: March 24, 2015
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Shingo Fukumaru, Shinya Morimoto, Hideaki Iura, Akira Yamazaki
  • Patent number: 8988021
    Abstract: A method of controlling a brushless motor that includes rectifying an alternating voltage to provide a rectified voltage having a ripple of at least 50%, exciting a winding of the motor with the rectified voltage, and performing a first process or a second process in response to current in the winding exceeding a threshold that is proportional to the rectified voltage. The first process includes freewheeling the winding, while the second process includes continuing to excite the winding for an overrun period and freewheeling the winding at the end of the overrun period. Additionally, a control system that implements the method, and a motor system that incorporates the control system.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: March 24, 2015
    Assignee: Dyson Technology Limited
    Inventors: Andrew Charlton Clothier, Stephen Greetham, Nicholas Dalibor Tuftnell
  • Patent number: 8981703
    Abstract: A system for operating an electric machine includes: a rotor position sensor to provide a rotor position indication as a function of a rotor position angular range which indicates the position of a rotor of the electric machine; a control unit designed to associate in each case a commutation angular range, which indicates a certain control state for the stator coils, with one or more of the rotor position indications, so that a change in the commutation angular range is triggered by a change in the rotor position indication, and to change an association scheme of the associations between the rotor position indications and the respective commutation ranges as a function of a predefined rotational direction indication which indicates the desired rotational direction.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: March 17, 2015
    Assignee: Robert Bosch GmbH
    Inventor: Volker Bosch
  • Patent number: 8975850
    Abstract: There is provided a driving control device of an opening and closing body, which drives the opening and closing body in a closed state by a motor through an idling section thereof. The device includes a calculation section for calculating a rotation speed difference between a rotation speed of the motor in the idling section and a current rotation speed of the motor; and an insertion detection section for detecting insertion of a foreign member based on the calculated rotation speed difference and a predetermined threshold value. The threshold value monotonously decreases according to an increase in the rotation amount of the motor to coincide with a fully-closed state threshold value at a predetermined rotation amount of the motor within an error range of the rotation amount corresponding to the fully-closed state, and to maintain the fully-closed state threshold value to a maximum rotation amount in the error range.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: March 10, 2015
    Assignees: Aisin Seiki Kabushiki Kaisha, Toytota Jidosha Kabushiki Kaisha
    Inventors: Koichi Hirota, Nobuyasu Bessho, Masato Yamada, Shinichiro Noda, Tomomasa Inoue, Yoshiki Ishikawa, Tomoharu Tamaya
  • Patent number: 8975856
    Abstract: An electric motor (40) has a permanent-magnet rotor (46) and an apparatus for generating a three-phase sinusoidal current (i202, i204, i206) for supplying current to said motor (40), also a microprocessor (95) for executing the following steps: while the motor (40) is running at a substantially constant load, the motor is operated firstly at a predetermined operating voltage (U), and an amplitude of a current flowing to the motor is iteratively sampled, stored, and compared as applied voltage is decreased. If it is found, in this context, that the current flowing to the motor has not decreased as a result of reduction in the voltage amplitude, the motor (40) is operated at that current. If, however, it is found that the current flowing to the motor has decreased as a result of the reduction in the voltage delivered to the motor (40), the measurements and the comparison are repeated, optionally multiple times, in order to identify values for optimized efficiency.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: March 10, 2015
    Assignee: EBM-PAPST St. Georgen GmbH & Co. KG
    Inventor: Markus Hirt
  • Publication number: 20150061566
    Abstract: A control circuit for driving a motor and a method for controlling a speed of a motor are provided. The control circuit comprises a microcontroller and a drive circuit. The microcontroller has a memory. The drive circuit is configured to drive the BLDC motor according to a control of the microcontroller. The memory include a RPM table, and the microcontroller sends a duty signal to the drive circuit to change a speed of the motor according to the RPM table.
    Type: Application
    Filed: September 2, 2014
    Publication date: March 5, 2015
    Inventors: Ta-Yung Yang, Yu-Cheng Kang, Yung-Sheng Wu, Pei-Yu Chiang
  • Patent number: 8970156
    Abstract: A path display apparatus includes a first position command acquiring unit that acquires first position command for motors, a first position feedback acquiring unit that acquires first position feedback of each of the motors, a correction data acquiring unit that acquires correction data generated for each of the motors, a second position command calculating unit that subtracts the correction data from the first position command to calculate a second position command, a second position feedback calculating unit that subtracts the correction data from the first position feedback to calculate second position feedback, a command path display unit that displays a command path of the tip point of the tool, based on the second position command; and a feedback path display unit that displays a feedback path of the tip point of the tool, based on the second position feedback.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: March 3, 2015
    Assignee: FANUC Corporation
    Inventors: Junichi Tezuka, Hajime Ogawa