Specific Processing Of Feedback Signal Or Circuit Therefore (i.e., A-d Conversion, Compression, Or Modification) Patents (Class 318/400.04)
  • Patent number: 10972021
    Abstract: Disclosed are a method and a system for processing fault information of a decoding chip in a rotary transformer. The method includes: reading data information transmitted by the decoding chip according to a preset period; determining whether the data information includes alarm information; when the data information includes the alarm information, estimating a rotor-position value after an alarm occurs in real time according to a rotational speed in the data information obtained before the alarm occurs; determining whether a difference between a current rotor-position value and the estimated rotor-position value is greater than a fault threshold; and when the difference between the current rotor-position value and the estimated rotor-position value is greater than the fault threshold, controlling a motor using the estimated rotor-position value.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: April 6, 2021
    Assignee: BEIJING ELECTRIC VEHICLE CO., LTD.
    Inventors: Yi Zheng, Yujun Li, Shengran Xiao, Ronghong Liu
  • Patent number: 10969400
    Abstract: In order to correct the rotation angle value without an increase in the circuit size, a rotation period measurement unit measures a rotation period of a rotary shaft in which a rotation angle is detected by using a resolver that outputs a signal corresponding to the rotation angle of the rotary shaft. A rotation speed calculation unit calculates the rotation speed of the rotary shaft based on the rotation period. An acceleration calculation unit calculates the rate of change of the rotation speed per interval when a given rotation angle of the rotary shaft is divided into 2n+1 intervals, in which n is an integer of 1 or more. An estimated angle calculation unit calculates the rotation angle estimation value, assuming that the rotary shaft performs a uniform acceleration motion, based on the rotation speed and the rate of change of the rotation speed. A correction value calculation unit calculates the correction value of the rotation angle value converted from the output signal of the resolver.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: April 6, 2021
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Yoshitaka Shibuya, Hayato Kimura
  • Patent number: 10914806
    Abstract: A method for dynamically compensating for the offset error of an acquisition system includes a current sensor to measure or estimate the current passing through an actuator of a electrical apparatus that is electrically supplied by an AC voltage, the acquisition system having a predetermined offset value, the method includes determining a plurality of periodic temporal operating ranges of the actuator in order to dynamically apply a compensation sequence for the offset error of the acquisition system, executing the compensation sequence during any one among the plurality of determined temporal operating ranges, the synchronization between the any one of the determined temporal operating ranges of the actuator and the execution of the compensation sequence being performed using a synchronization system including a synchronization module designed to identify reference times from the AC supply voltage of the sector.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: February 9, 2021
    Inventors: Damien Coutellier, Louis Schmerber
  • Patent number: 10903767
    Abstract: According to the present invention, in position sensorless control for switching between a 120-degree energization scheme for a low-speed region and a 180-degree energization scheme for a mid-to-high-speed region, stable and highly accurate speed control characteristics are provided by suppressing speed deviation ??r in the low-speed region, and by preventing current jump-up caused by a discontinuous rotational speed occurring during switching to the mid-to-high-speed region. In the case of driving in the 120-degree energization scheme, a voltage command value is corrected such that an estimated speed value or a detected speed value follows a speed command.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: January 26, 2021
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Agnes Hadinata, Yoshitaka Iwaji, Kazuaki Tobari, Yusaku Onuma, Takuya Sugimoto, Masato Ohya
  • Patent number: 10886864
    Abstract: A motor driving device according to embodiments includes a driving circuit, a controller, and a mask processor. The driving circuit switches, a voltage applied to a motor, according to a switching operation by plural switching elements, for a first switching operation and a second switching operation, and to control driving of the motor. The controller controls the driving circuit on the basis of timing when an electric current flowing to the motor exceeds a predetermined current value. The mask processor sets a predetermined mask time in the switching operation by the control of the driving circuit and enables a change of the predetermined mask time on the basis of at least one of a power supply voltage and the predetermined current value.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: January 5, 2021
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventor: Katsumasa Tanaka
  • Patent number: 10840834
    Abstract: The present invention addresses the problem of proposing a method for driving a sensorless motor, wherein the method is different from a conventional rotor position estimation method according to a time axis and performs rotor position estimation according to an angle axis, thus making it possible for excitation switching to always be achieved at an optimal angle in response to a change in speed. According to the present invention, an MCU (5) starts excitation of a coil at an excitation section starting point, measures an induced voltage component generated in the coil by a certain period of energization, integrates the voltage component, and sets an excitation section ending position when the integral value reaches zero. In addition, the motor is continuously rotated by repeating the same integration operation by switching to an excitation pattern in the next excitation section.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: November 17, 2020
    Assignee: HOKUTO CONTROL CO., LTD.
    Inventor: Kiyoshi Yamamoto
  • Patent number: 10763771
    Abstract: A method and a system for controlling a motor for a vehicle are provided. The vehicle is capable of being continuously driven by controlling the motor based on position information of a rotor derived using a sensorless estimation algorithm in the event of a failure of a position sensor of a motor rotor while the vehicle is being driven.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: September 1, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Heon Young Kwak, Chae Duck Chon, Ho Joon Shin
  • Patent number: 10749454
    Abstract: A method of operating a final drive unit clutch. The method provides an electric motor coupled with a clutch. The electric motor including a stator, a first Hall-effect sensor coupled with the stator, a second Hall-effect sensor coupled with the stator, a third Hall-effect sensor coupled with the stator, and a rotor having at least one magnetic pole pair. The method also provides for a controller in electrical communication with the electric motor. The method includes determining a first ideal commutation point, and calculating a first offset of a first Hall-effect sensor state change from the first ideal commutation point. The method further includes calculating a time delay of commutation, during the clutch transition between a non-torque transmitting position and a torque transmitting position, utilizing the first offset such that a second Hall-effect sensor state change corresponds with a second ideal commutation point.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: August 18, 2020
    Assignee: DANA BELGIUM N.V.
    Inventor: Stijn Goossens
  • Patent number: 10742143
    Abstract: A controller circuit for a brushless direct current (BLDC) motor may be configured to estimate a rotor position of the BLDC motor and apply a constant start-up voltage to a stator winding of the BLDC motor using the estimated rotor position until a current at the stator winding corresponds to a local minimum current. The controller circuit may be further configured to, in response to the current at the stator winding corresponding to the local minimum current, allow commutation of the current at the stator winding, calculate the rotor position in response to allowing the commutation of the current at the stator winding, and commutate the current at the stator winding using the calculated rotor position.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: August 11, 2020
    Assignee: Infineon Technologies AG
    Inventors: Christopher Roemmelmayer, Maximilian Burggraf
  • Patent number: 10738681
    Abstract: Apparatus for actuating and controlling the rotation, about their longitudinal axis (Y-Y), of blades (20) of cooling fans (10) for operating machines and/or vehicles, in particular agricultural tractors and off-road vehicles, said fan being mounted on a hub (11) which can be rotationally driven about its axis (X-X) by associated driving means (3,3a) suitable for connection to the heat engine (1) and mounted on a fixed support (5) by means of a bearing (3b) the apparatus comprising a ring (71) provided with a radial seat (71a) inside which a radial pin (72), eccentrically engaged in a base (73) integral with the shank (20a) of the blade (20), is inserted; an electric motor (30) which is coaxial with the axis (X-X) of the hub (11) and the shaft (31) of which is coaxially connected to a reduction gear (40), the kinematic output element (143) of which is coaxially connected by means of a screw (51a)/female thread (76a) coupling to a slider (76) displaceable in both directions along the axis (X-X) and kinematicall
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: August 11, 2020
    Assignee: BARUFFALDI S.P.A.
    Inventor: Piercarlo Boffelli
  • Patent number: 10693407
    Abstract: A driver unit for an interior permanent magnet motor (IPM) is presented. The driver unit includes sensor electronics configured to sense a phase voltage corresponding to one or more phase terminals of the IPM motor to generate a corresponding phase voltage signal. The driver unit further includes a controller electrically coupled to the sensor electronics and configured to extract one or more triplen harmonics of an order of a ninth harmonic and higher than the ninth harmonic of a fundamental frequency of the phase voltage signal corresponding to the one or more phase terminals. The controller is further configured to determine an angular position of a rotor of the IPM motor based on the extracted one or more triplen harmonics. Related motor assembly and method for controlling the IPM motor are also presented.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: June 23, 2020
    Assignee: BAKER HUGHES OILFIELD OPERATIONS, LLC
    Inventors: Shahid Ali, Rahul Radhakrishna Pillai, Jigarkumar Narendrabhai Hingu, Vandana Rallabandi
  • Patent number: 10662953
    Abstract: A fluid extraction system is presented. The fluid extraction system includes a direct current (DC) bus and a plurality of fluid extraction sub-systems configured to be electrically coupled to the DC-bus. At least one fluid extraction sub-system includes an electric machine configured to aid in the extraction of a fluid from a well. The electric machine includes a plurality of phase windings and a rotor. The at least one fluid extraction sub-system further includes a control sub-system to control a rotational speed of the rotor by selectively controlling a supply of a phase current to the plurality of phase windings such that the rotational speed of the rotor of the electric machine is different from rotational speed of a rotor of another electric machine in at least one of other fluid extraction sub-systems. Related method for controlling rotational speeds of electric machines is also presented.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: May 26, 2020
    Assignee: Baker Hughes Oilfield Operations, LLC
    Inventors: David Allan Torrey, Nathaniel Benedict Hawes, Ayman Mohamed Fawzi El-Refaie, Muhammad Hassan Chishti
  • Patent number: 10658948
    Abstract: A DC/AC electrical power converter device having inlet terminals for electrically connecting to a DC electricity power supply network, outlet terminals for electrically connecting to an electric motor, a chopper electrical converter coupled to the inlet terminals, and an electrical inverter coupled between the chopper electrical converter and the outlet terminals. The converter device further includes a control unit for controlling the electrical inverter and that is configured to operate using pre-calculated pulse width modulation with pre-calculated unchanging switching instants for the controlled switches of the electrical inverter regardless of the frequency of rotation of the motor and of the voltage of the electricity network for connection to the device.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: May 19, 2020
    Assignee: SAFRAN ELECTRICAL & POWER
    Inventors: Guillaume Boulet, Wenceslas Bourse, Pascal Rollin, Jeremy Cuenot, Regis Bernard Albert Meuret
  • Patent number: 10651894
    Abstract: A transceiver capable of common mode operating range and output voltage tolerance set by an isolation boundary and not limited by the device type used in the circuitry. The subject technology is a powered isolated transceiver, where the isolated generated supply and ground nodes are concealed and thus do not participate in tests that stress electrostatic discharge (ESD)/electrical overstress (EOS) or voltage tolerance. The architecture of the subject technology has the advantage of extremely high common mode performance and robust performance using low voltage devices and simplified architecture, which in turn provides less capacitive loading, faster operation, less expensive die development, electromagnetic interference (EMI) advantages, and simple active termination. The subject technology includes an isolation architecture that can be used in environments where isolation is used but is also advantageous in systems without the need for isolation.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: May 12, 2020
    Assignee: Linear Technology Holding LLC
    Inventor: Steven John Tanghe
  • Patent number: 10644623
    Abstract: Based on an output signal, among a plurality of switching elements, an element control part outputs a PWM signal having a maximum duty ratio to a pair of switching elements that drive a first coil among a plurality of coils to a high level, outputs a PWM signal having a minimum duty ratio to a pair of switching elements that are connected to each other in series and that drive a second coil among the plurality of coils to a low level, and outputs a PWM signal having a medium duty ratio between the maximum duty ratio of the PWM signal and the minimum duty ratio of the PWM signal to a pair of switching elements that are connected to each other in series and that drive a third coil among the plurality of coils.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: May 5, 2020
    Assignee: Mitsuba Corporation
    Inventors: Tamotsu Iwazaki, Toru Furusawa, Takashi Hoshino, Tomofumi Kobayashi
  • Patent number: 10644625
    Abstract: Implementations of a system for sensing rotor position of a PMSM may include: a controller which may be coupled with the PMSM. The controller may be configured to apply a plurality of voltage vectors to the PMSM to generate a plurality of sensing signals from a stator of the PMSM in response. A comparator may be coupled to the PMSM configured to receive and to compare each one of the plurality of sensing signals with a threshold voltage. A rise time measurement circuit may calculate a plurality of rise times using the plurality of sensing signals in response to receiving a signal from the comparator. The rotor-angle estimation circuit may be configured to identify from the plurality of rise times a shortest rise time and a voltage vector corresponding with the shortest rise time and thereby identify the position of the rotor of the PMSM.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: May 5, 2020
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Masanori Okubayashi
  • Patent number: 10637383
    Abstract: A system and method is provided to monitor wear on a power factor correction capacitor in a motor system. The system and method obtains a baseline inductance angle, reactive power or power factor corresponding to a baseline power factor correction by the capacitor in the circuit; monitors a current supplied to the motor at a location upstream of the capacitor; monitors a voltage supplied to the motor, and determines a present inductance angle, reactive power or power factor based on the monitored current and voltage. The present inductance angle, reactive power or power factor corresponds to a present power factor correction by the capacitor. The system and method can then determine when the power factor correction of the capacitor has degraded to an unsatisfactory level based on a change in the inductance angle, reactive power or power factor from the baseline values, and take appropriate action.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: April 28, 2020
    Assignee: SCHNEIDER ELECTRIC USA, INC.
    Inventors: Richard K. Weiler, Benjamin W. Edwards, Alan E. Freeman, Kevin M. Jefferies, Julius M. Liptak, Matthew L. White
  • Patent number: 10602009
    Abstract: An apparatus according to the aspect of the embodiments includes a phase determiner configured to determine a rotational phase of a rotor, a speed determiner configured to determine a rotational speed of the rotor, a controller having a first control mode for controlling the motor by supplying constant currents to windings, and a discriminator configured to discriminate whether a rotation of the motor is abnormal based on the rotational speed when the rotational speed corresponding to a command speed is equal to or higher than a predetermined value in a state where the controller is controlling the motor in the first control mode. When a signal output from the discriminator indicates that the rotation of the motor is abnormal, the controller stops the motor. When the signal output from the discriminator indicates that the rotation is not abnormal, the controller continues a drive of the motor.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: March 24, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Yuta Nito
  • Patent number: 10574160
    Abstract: A brushless motor includes: a 2n-pole (n: natural number) rotor; and a first Hall element and a second Hall element arranged at a positional relationship of an angle ? (0°<?<180°) from each other with respect to a rotation axis of the rotor. The first Hall element and the second Hall element each output a voltage signal in accordance with a magnitude of a magnetic field of the rotor. A rotational angle detection circuit for detecting a rotational angle of the brushless motor includes: a phase detection circuit that receives the voltage signals from the first Hall element and the second Hall element and that detects a phase of the rotor by using values of the voltage signals and information of the angle ?; and an angle calculation circuit that calculates a rotational angle of the rotor calculated from an initial angle based on the phase and a predetermined reference angle.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: February 25, 2020
    Assignee: PHC HOLDINGS CORPORATION
    Inventor: Kazuya Kondoh
  • Patent number: 10560044
    Abstract: A motor control method includes acquiring a component BEMF? on an ?-axis and a component BEMF? on a ?-axis of counter electromotive force of a motor in an ??-fixed coordinate system; performing time differentiation on the component BEMF? on the ?-axis and the component BEMF? on the ?-axis; obtaining a difference value between first and second multiplication values, the first multiplication value being obtained by multiplying the component BEMF? on the ?-axis by a differential value of the component BEMF? on the ?-axis, the second multiplication value being obtained by multiplying the component BEMF? on the ?-axis by a differential value of the component BEMF? on the ?-axis; detecting a rotation direction of the rotor based on the difference value; and controlling the motor based on a detection result of the rotation direction of the rotor.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: February 11, 2020
    Assignee: NIDEC CORPORATION
    Inventor: Ahmad Ghaderi
  • Patent number: 10541626
    Abstract: Power conversion systems and a controller thereof includes a first processing system that computes phase references for respective phase lines of an inverter according to a feedback value, a setpoint value, and a scaling factor to emulate a scaled frequency that is less than a switching frequency, and a second processing system that generates a carrier waveform having the switching frequency, receives the phase reference from the first processing system for each inverter phase line, and compares each phase reference with the carrier waveform to generate pulse width modulated switching control signals for switching devices of the inverter.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: January 21, 2020
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Jacob M. Lamb, Brian J. Seibel, Timothy M. Rowan, Lixiang Wei
  • Patent number: 10486689
    Abstract: A method includes automatically operating an electrified vehicle in a noise reduction mode, via a control system of the electrified vehicle, if, based at least on noise restriction information and driver history information received by the control system, a current time and a current location of the electrified vehicle are appropriate for invoking the noise reduction mode.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: November 26, 2019
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: David Farrell, Mark Steven Yamazaki, Ming Cheng, Tony Tae-Jin Pak, Nagarjuna Muvva
  • Patent number: 10476420
    Abstract: Provided herein is a BLDC motor having a control system, a rotor including a motor magnet having a plurality of alternating magnetic poles thereon, a stator and a ring magnet. The ring magnet is mounted on the rotor axially adjacent the motor magnet. The number of poles on the ring magnet is an integer multiple of the number of poles on the motor magnet. Also provided is a method for controlling the BLDC motor including the steps of supplying a current to the motor, determining if the torque produced by the motor is in a positive or negative direction, determining a multiplier based on the direction of the torque, multiplying the supplied current by the multiplier, implementing a commutation sequence to provide current to the motor, measuring the current in each of the plurality of windings and adjusting the current provided to the motor based on the measured current.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: November 12, 2019
    Assignee: Dana Automotive Systems Group, LLC
    Inventors: Stijn Goossens, Johannes van Ginkel
  • Patent number: 10447188
    Abstract: A method and system of controlling driving of a brushless DC electric motor (BLDC) of an electric water pump are provided. The method includes estimating an initial position of a rotor using a magnitude of a current detected in a three-phase coil wound on a stator and converting a current magnitude that reflects a rotational angle of the rotor with respect to the initial position into two direct currents based on the three-phase current. The converted direct currents are output and a rotational angle, a speed, a flux and a torque of the rotor are acquired based on values of the three-phase current, a voltage generated according to flow of the three-phase current, a predetermined coil resistance, and an inductance input. A speed of the motor is then adjusted based on the acquired rotational angle, speed, flux, and torque of the rotor.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: October 15, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Myung Hwa Ind. Co., Ltd.
    Inventors: Dong Soo Shim, Yeon Ho Kim, Byoung Hoon Choi, Jae Shin Yi, Hyeong Geun Song, Geun Oh Dong
  • Patent number: 10401261
    Abstract: An actuator monitoring system is provided with an electric actuator having a motor and a control unit which outputs a control command (CMD) to the motor to control the operation of the motor. The control unit calculates a use time of the electric actuator based on the control command (CMD) outputted to the motor. Moreover, the control unit estimates the lifetime of the electric actuator based on the calculated use time.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: September 3, 2019
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventor: Atsushi Kakino
  • Patent number: 10396692
    Abstract: A method for operating a brushless direct current motor wherein, by the energization of a plurality of armature coils which are arranged on a stator and form a three-phase current winding for generating a rotating field which rotates around the stator, and having three terminals, a rotating field is generated in order to drive a rotor, which is rotatable about an axis of rotation relative to the stator and has at least two opposing permanent magnet poles. For the determination of the position of the rotor relative to the stator a measurement voltage signal is applied between a first and second of the terminals, a resulting voltage is measured on a third of the terminals, a gradient value which indicates the gradient of the resulting voltage in a time interval is determined with reference to the progression over time of the resulting voltage.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: August 27, 2019
    Assignee: Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft
    Inventor: Daniel Schikorra
  • Patent number: 10389286
    Abstract: A method of controlling a plurality of permanent magnet synchronous motors using a single inverter that includes obtaining an estimate of rotor position and speed individually for a plurality of permanent magnet synchronous motors. The method can include calculating the average rotor position from the obtained estimate of the rotor position for each permanent magnet synchronous motor of the plurality of permanent magnet synchronous motors. The method can include reconstructing a rotor permanent-magnet flux for each permanent magnet synchronous motor and transforming the reconstructed rotor permanent-magnet flux for each permanent magnet synchronous motor to average fluxes and average differential fluxes on an average d-q reference frame. The method can include obtaining the average current reference in the average d-q reference frame for the plurality of permanent magnet synchronous motors; and determining an inverter voltage reference.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: August 20, 2019
    Assignees: SCHLUMBERGER TECHNOLOGY CORPORATION, BOARD OF REGENTS/THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Zhuangyao Tang, Bilal Akin, Xuedong Yang, Maxim Klyuzhev
  • Patent number: 10381966
    Abstract: A PN-busbar common system includes motor drive devices for a plurality of motors, each of which is supplied with power from a common PN-busbar, where the motor drive devices individually drive the corresponding motors. Each of the motor drive devices executes a regenerative control on a basis of a regenerative-control start voltage, and controls to stop the regenerative control on a basis of a regenerative-control stop voltage, and also individually calculates a regenerative load ratio to control to enable or disable the regenerative control on a basis of a result of a comparison between a calculated regenerative load ratio and a set regeneration-capable load ratio.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: August 13, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takashi Miyasaka, Yasuhiro Endo
  • Patent number: 10305400
    Abstract: A magnetic sensor integrated circuit is provided, which includes: a magnetic sensing element to detect change in an external magnetic field to output a magnetic field sensing signal; a signal processor to process the magnetic field sensing signal and output a magnetic field detection signal; and a current source generator to output a constant current to the magnetic sensing element. The constant current is not influenced by a temperature.
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: May 28, 2019
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Guang Jie Cai, Chun Fai Wong
  • Patent number: 10277149
    Abstract: Air blower equipped with brushless DC motor includes an inverter circuit, a drive logic controller, a duty indicator, a motor voltage detector, a motor current detector, and a correlation detector. A duty indicating value of the duty indicator is determined according to a value of the correlation detector.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: April 30, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Toshihiro Matsumoto
  • Patent number: 10224843
    Abstract: The present invention relates to a motor drive device and a phase current detecting method for a three-phase brushless motor, and more particularly to a technique of detecting each phase current through A/D conversion that is carried out once per PWM carrier cycle, by use of a current sensor for detecting a DC bus current of an inverter. The control unit of the present invention calculates a phase current for one phase, an absolute phase current value of which becomes maximum at a detection timing that is set once per PWM control cycle, from an output of the current sensor, and estimates phase currents for the remaining two phases based on a peak value of a phase current detected at each detection timing, a motor angle, and a phase shift of an actual phase current waveform relative to the motor angle.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: March 5, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventor: Masaki Hano
  • Patent number: 10214205
    Abstract: A hybrid vehicle includes an engine; a generator that generates a counter-electromotive force; a motor; a first inverter for the generator; a second inverter for the motor; a step-up converter that steps up an electric power of a first voltage system electric power line and supplies the electric power to a second voltage system electric power line; and a smoothing capacitor of the second voltage system electric power line. In a case where the hybrid vehicle travels by driving the engine in a state in which the stepping up by the step-up converter and an operation of the first inverter are stopped when an abnormality occurs in a voltage sensor, when an electronic control unit determines that there is an indication that the voltage of the capacitor will rise, the first inverter is controlled to cause three phases of the first inverter to be in an ON state.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: February 26, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shikoh Takakura, Shinichiro Minegishi
  • Patent number: 10181813
    Abstract: A communication system for use in a switching module includes a low-side control block coupled to control switching of a low-side switch of the switching module. The low-side control block is further coupled to be referenced with a low-side reference system ground. A high-side control block is coupled to control switching of a high-side switch of the switching module. The high-side control block is further coupled to be referenced with a floating node of the switching module. During steady state operation, the low-side control block is coupled to send signals during each switching cycle to the high-side control block to turn the high-side switch on and off. A status update is communicated from the high-side control block to the low-side control block through a first single-wire communication link.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: January 15, 2019
    Assignee: Power Integrations, Inc.
    Inventors: Stefan Bäurle, Michael Yue Zhang, Yury Gaknoki
  • Patent number: 10171012
    Abstract: An air conditioner and a startup control method and system for an outdoor fan of the air conditioner. While in a process of charging a bootstrap capacitor in an actuator of a motor of the outdoor fan, an initial rotation state of the motor is detected in real time, and, when charging of the bootstrap capacitor is completed, startup of the motor is correspondingly controlled on the basis of the detected initial rotation state. This allows real time initial startup work state to be acquired when charging of the bootstrap capacitor is completed, thus allowing the motor to be started smoothly, increasing the success rate in starting the motor, and solving the problem of low success rate in starting the motor of an outdoor fan.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: January 1, 2019
    Assignee: Guangdong Welling Motor Manufacturing Co., Ltd.
    Inventors: Yanchao Fu, Xiaoan Zhao, Jie Sun, Liming Gong
  • Patent number: 10147703
    Abstract: In some examples, a device includes a power supply element and a reference voltage element, wherein the reference voltage element is electrically isolated from the power supply element. The device further includes a high-side semiconductor die including at least two high-side transistors, wherein each high-side transistor of the at least two high-side transistors is electrically connected to the power supply element. The device also includes a low-side semiconductor die including at least two low-side transistors, wherein each low-side transistor of the at least two low-side transistors is electrically connected to the reference voltage element. The device includes at least two switching elements, wherein each switching element of the at least two switching elements is electrically connected to a respective high-side transistor of the at least two high-side transistors and to a respective low-side transistor of the at least two low-side transistors.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: December 4, 2018
    Assignee: Infineon Technologies AG
    Inventors: Stefan Macheiner, Amirul Afiq Hud, Teck Sim Lee, Thomas Stoek, Lee Shuang Wang, Chooi Mei Chong, Wei Hing Tan
  • Patent number: 10141884
    Abstract: A method for cooling system components of information handling systems may include generating a first pulse width modulation (PWM) control signal for controlling at least one cooling fan configured to cool a system component, filtering the first PWM control signal, and applying the filtered first PWM control signal to the at least one cooling fan. The first PWM control signal may be used to control a component fan and then filtered to generate a filtered first PWM control signal used to control a system fan. The filtering of the control signal may include dampening the control signal such that the control signal is less responsive to temperature changes as the temperature nears a set temperature.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: November 27, 2018
    Assignee: Dell Products L.P.
    Inventors: Kevin Locke, Travis North, Joohyun Woo
  • Patent number: 10114386
    Abstract: A control system includes an electro-hydraulic servo valve configured to move about a plurality of positions in response to receiving an analog bi-polar current signal. An electronic field programmable gate array (FPGA) generates first and second digital pulse width modulation (PWM) signals according to an adjustable duty cycle. An electronic bridge circuit is in electrical communication with the FPGA to convert the first and second digital PWM signals into the bi-polar current signal. An electronic current sensing circuit is in electrical communication with the bridge circuit, the current sensing circuit configured to generate a digital feedback signal indicating an average current level of the bi-polar signal. The FPGA controls the duty cycle based on at least the average current level indicated by the digital feedback signal.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: October 30, 2018
    Assignee: GOODRICH CORPORATION
    Inventors: Camila Summers, Eric Duane Ronning
  • Patent number: 10063167
    Abstract: A motor drive controller includes: an advance-angle reference voltage generator that generates an advance-angle reference voltage; a back electromotive voltage comparator that generates phase signals of phases at a cross timing of the advance-angle reference voltage and back electromotive voltages of phases of a motor; and a controller that operates to perform a process including: detecting a rotation speed of the motor based on the phase signals of the phases; increasing the advance-angle reference voltage when the rotation speed moves from a high speed to a low speed; and decreasing the advance-angle reference voltage when the rotation speed moves from a low speed to a high speed.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: August 28, 2018
    Assignee: Minebea Co., Ltd.
    Inventors: Hiroyuki Kaidu, Toshihiro Tamitsuji
  • Patent number: 10033313
    Abstract: A control method for restarting a permanent magnet synchronous motor (PMSM) in a rotating condition, and a device and a system thereof are provided. In the method, an electrical angular speed ?e of the PMSM is obtained based on a speed of a trailer to obtain a back electromotive force of the PMSM. The back electromotive force is compared with a voltage at a side of an inverter, and if the electromotive force of the permanent magnet synchronous motor is higher than the voltage at the side of the inverter, the restarting of the PMSM is forbidden, otherwise, the restarting of the PMSM is allowed. Therefore, in the present disclosure, the low-speed operating condition and the high-speed operating condition correspond to different position angles of the rotor, and the PMSM is started based on the position angle of the rotor.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: July 24, 2018
    Assignee: CSR ZHUZHOU ELECTRIC LOCOMOTIVE RESEARCH INSTITUTE CO., LTD.
    Inventors: Jianghua Feng, Kean Liu, Junfeng Xu, Jing Shang, Yuliang Wen, Yaping He, Chaoyang Zhang, Xiong Liu, Yonghui Nan, Huadong Liu, Lei Xiao, Hanfeng Zheng
  • Patent number: 10009015
    Abstract: In accordance with an embodiment, an automatic zeroing circuit is provided that includes an automatic zeroing circuit, comprising a first voltage adjustment circuit coupled for receiving an induced voltage and a second voltage adjustment circuit coupled for receiving a common voltage. A comparator having an inverting input terminal coupled to the first voltage adjustment circuit and a noninverting input terminal coupled to the second voltage adjustment circuit. In accordance with another embodiment, a method for automatically zeroing a detection circuit includes receiving a first back electromotive force at a first voltage level and shifting the first back electromotive force from the first voltage level to a second voltage level. A comparator circuit is calibrated and the first back electromotive force is detected.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: June 26, 2018
    Assignee: Semiconductor Components Industries, LLC
    Inventors: Satoshi Yokoo, Atsuhiro Ichikawa
  • Patent number: 10003289
    Abstract: A method for controlling a motor is provided. The motor control method includes deriving a motor rotational speed estimate using a speed estimator model and deriving a motor hall sensor frequency estimate based on the derived rotational speed estimate. Additionally, a filter for noise detection is set based on the derived hall sensor frequency estimate and the derived rotational speed estimate. A motor hall sensor frequency derived from the hall sensor is then applied to a predetermined filter to detect a hall sensor noise frequency.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: June 19, 2018
    Assignee: Hyundai Motor Company
    Inventors: Dong Hun Lee, Chang Seok Ryu, Min Su Kang, Sung Do Kim
  • Patent number: 9966965
    Abstract: An apparatus includes a signal generator. The signal generator includes a voltage controlled oscillator (VCO) coupled to provide an output signal having a frequency. The signal generator further includes an asymmetric divider coupled to receive the output signal of the VCO and to provide an output signal. The output signal of the asymmetric divider has a frequency that is half the frequency of the output signal of the VCO. The asymmetric divider presents a balanced load to the VCO.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: May 8, 2018
    Assignee: Silicon Laboratories Inc.
    Inventors: Aslamali A. Rafi, Rangakrishnan Srinivasan, Francesco Barale
  • Patent number: 9960717
    Abstract: A motor drive control device, which drives a motor including a plurality of phase coils and a rotor, includes: a motor driver, which outputs a drive signal to the phase coils on a drive control signal; one position sensor, which is provided in a position where a timing of at least one of a rising edge and a falling edge of a rotor position signal is near a zero cross timing of a phase signal of any phase coil; and a controller that: generates the drive control signal based on the phase signal in a case where a rotational speed of the motor is less than a predetermined rotational speed; and generates the drive control signal based on the rotor position signal output from the one position sensor in a case where the rotational speed is equal to or more than the predetermined rotational speed.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: May 1, 2018
    Assignee: Minebea Co., Ltd.
    Inventor: Hiroyuki Kaidu
  • Patent number: 9941826
    Abstract: A motor drive control device drives a motor including a plurality of phase coils and a rotor rotatably supported with respect to the plurality of phase coils, and the motor drive control device includes a controller, which generates a drive control signal; a motor driver, which outputs a drive signal to each of the phase coils of the motor, based on the drive control signal; and a back-electromotive-voltage detector, which is connected to each of the phase coils and includes resistive voltage dividing circuits having respectively different voltage-dividing ratios, wherein the back-electromotive-voltage detector detects a rotational position of a rotor for sensorless driving by using the resistive voltage dividing circuits.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: April 10, 2018
    Assignee: Minebea Co., Ltd.
    Inventors: Hiroyuki Kaidu, Yuji Omura
  • Patent number: 9929686
    Abstract: A controller for a permanent magnet synchronous motor includes an estimating portion configured to determine an estimated value of a rotational speed of the rotor and an estimated value of a position of magnetic poles of the rotor based on a value of the current detected by the current detector and a parameter value indicating an interlinkage magnetic flux caused by the permanent magnet across the winding; a control unit configured to control the drive portion to cause the rotating magnetic field based on the estimated value of the rotational speed and the estimated value of the position of the magnetic poles; and a correction portion configured to correct the parameter value indicating the interlinkage magnetic flux based on correction information, the correction information being determined based on a temperature of the winding and a relationship between the temperature of the winding and a temperature of the permanent magnet.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: March 27, 2018
    Assignee: Konica Minolta, Inc.
    Inventors: Daichi Suzuki, Yuta Tachibana, Hiroyuki Yoshikawa, Yasuhiro Koide
  • Patent number: 9912269
    Abstract: A motor-drive circuit includes: an output transistor configured to supply a drive current to a motor for a cooling fan; a switching-control circuit configured to control switching of the output transistor so that the motor rotates in a first direction, or rotates in a second direction opposite to the first direction; and a switching circuit configured to, when a first time has elapsed since start of rotation of the motor in the first direction, cause the switching-control circuit to start switching control so that the motor stops rotating in the first direction and thereafter rotates in the second direction, and configured to, when a second time has elapsed since start of rotation of the motor in the second direction, cause the switching-control circuit to start switching control so that the motor stops rotating in the second direction and thereafter rotates in the first direction.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: March 6, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Tetsuya Yoshitomi, Masashi Tanabe, Syunji Suzuki
  • Patent number: 9864002
    Abstract: In a sensor output determination apparatus, a converter converts analog outputs of two sensors of a first-phase to two digital signals representing a current of the first-phase, and converts analog outputs of two sensors of a second-phase to two digital signals representing a current of the second-phase. The determination section determines whether the analog outputs of the two sensors of the first-phase are normal based on the two digital signals representing the current of the first-phase, and determines whether the analog outputs of the two sensors of the second-phase are normal based on the two digital signals representing the current of the second-phase. The transmission section transmits one of the two digital signals representing the current of the first-phase, one of the two digital signals representing the current of the second-phase, and a digital signal representing a result of determinations of the determination section, to the outside of the apparatus.
    Type: Grant
    Filed: May 7, 2015
    Date of Patent: January 9, 2018
    Assignee: DENSO CORPORATION
    Inventor: Yasuhiro Nakai
  • Patent number: 9806662
    Abstract: A motor drive controller includes: a rotation status detector that detects a rotation status of a rotor of a motor and generates rotation status detection information corresponding to the detected rotation status; a rotation unevenness information generator that measures a rotation unevenness indicating a flutter characteristic of the motor based on the rotation status detection information and generates rotation unevenness information according to a result of measurement of the rotation unevenness; a control circuit that generates a driving control signal based on the rotation unevenness information and the target speed signal for controlling the motor to rotate in target speed corresponding to the target speed signal; and a motor driver that outputs a driving signal to the motor based on the driving control signal.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: October 31, 2017
    Assignee: Minebea Co., Ltd.
    Inventor: Keiichi Katayama
  • Patent number: 9771098
    Abstract: A motor control device includes a motor drive circuit and a microcomputer that controls the drive circuit. The microcomputer generates a control signal on the basis of duty command values Du, Dv, and Dw to control the drive circuit. The microcomputer includes a dead time compensation section that corrects the duty command values Du, Dv, and Dw on the basis of dead time compensation values Ddu, Ddv, and Ddw. The dead time compensation section includes a basic compensation value computation section that computes a basic compensation value Dd as a fundamental value of the dead time compensation values Ddu, Ddv, and Ddw, and a filter section that performs a filtering process corresponding to a low-pass filter on the basic compensation value Dd. The dead time compensation section sets the dead time compensation values Ddu, Ddv, and Ddw on the basis of an output value ? from the filter section.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: September 26, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Satoru Mikamo, Ayumi Koike
  • Patent number: 9774279
    Abstract: A system for controlling movement of an actuator includes an input power source that provides an input pulse width (PWM) signal; a motor driver that receives the PWM signal and provides a synthesized three-phase drive signal; a brushless direct current (BLDC) motor that receives the drive signal and operates in response to the received drive signal to reposition the actuator; and a controller that receives the PWM signal. The controller includes an amplitude detection module that detects the amplitude of the PWM signal, and a direction detection module that detects the polarity of the PWM signal.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: September 26, 2017
    Assignee: BorgWarner Inc.
    Inventors: Brian Edward Handlon, Jeffrey Carter