Patents Examined by Kawing Chan
  • Patent number: 10454396
    Abstract: A polyphase electric motor control device stores a first threshold as a duty cycle at which noise caused by a high potential-side switching element starts to overlap a first measurement period, and a second threshold as a duty cycle at which time when a low potential-side switching element is switched from on to off is after an end of a second measurement period, makes a first judgment for comparing a maximum target duty cycle with the first threshold, and a second judgment for comparing a second greatest target duty cycle with the second threshold, measures a current in the first measurement period when the maximum target duty cycle is smaller than the first threshold, and measures a current in the second measurement period when the maximum target duty cycle is greater than the first threshold and the second greatest target duty cycle is smaller than the second threshold.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: October 22, 2019
    Assignee: OMRON AUTOMOTIVE ELECTRONICS CO., LTD.
    Inventors: Yoji Mori, Taku Ogasawara, Satoshi Doba
  • Patent number: 10449862
    Abstract: Cell voltage measurement is executed immediately after termination of diagnosis on a cell voltage detection function. In a battery managing device 10, a voltage detecting unit 140 detects a terminal voltage of each of battery cells 21 and 22. An RC filter 110 is electrically connected to voltage detecting lines L1, L2, and L3, and a status variation causing unit 130 causes an electrical status variation with respect to the voltage detecting lines L1, L2, and L3. A voltage fluctuating unit 120 fluctuates the terminal voltage of the battery cells 21 and 22 in response to the electrical status variation that is caused by the status variation causing unit 130. A microcomputer 150 diagnoses the voltage detecting unit 140 on the basis of a detection result of the terminal voltage of the battery cells 21 and 22 by the voltage detecting unit 140 when the terminal voltage of the battery cells 21 and 22 is fluctuated by the voltage fluctuating unit 120.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: October 22, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Tomonori Kanai, Akihiko Kudo, Tomoyuki Arima, Akiko Tsukamoto
  • Patent number: 10447180
    Abstract: A method of operating an electromechanical actuator (EMA) system includes determining a command time remaining for an actuator to attain a commanded position and determining a stop time required to stop movement of the actuator. The command time is compared to the stop time, and an electric motor driving the actuator is decelerated if the stop time is equal to or greater than the command time. An electromechanical actuator system includes an actuator and an electric motor operably connected to the actuator, the electric motor configured to drive movement of the actuator. A controller is operably connected to the electric motor to control operation of the actuator. The controller is configured to determine a command time remaining, determine a stop time, compare the command time to the stop time, and decelerate the electric motor if the stop time is equal to or greater than the command time.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: October 15, 2019
    Assignee: HAMILTON SUNDSTRAND SPACE SYSTEMS INTERNATIONAL, INC.
    Inventors: Scott C. Bonnett, Shawn Michael Nelson
  • Patent number: 10447119
    Abstract: Systems are described for converting the angular position of a shaft or an axle of a rotary motor to an analog or a digital code indicative of the angular position. The systems may include a magnetic disk encoded with first magnetic transitions and second magnetic transitions, where the first magnetic transitions are on a first circumference of the magnetic disk, the second magnetic transitions are on a second circumference of the magnetic disk, the first magnetic transitions represent regions on the magnetic disk, and the second magnetic transitions represent locations on the magnetic disk within each of the regions. The systems may include a first sensor to detect a region based on the first magnetic transitions and a second sensor to detect a location based on the second magnetic transitions. The systems may also include a decoder to identify an absolute location on the magnetic disk based on the region detected by the first sensor and the location detected by the second sensor.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: October 15, 2019
    Assignee: ClearMotion Acquisition I LLC
    Inventors: Antonio Sangermano, II, Richard O'Day
  • Patent number: 10447189
    Abstract: An electric motor control device includes a drive waveform generating unit configured to generate a drive waveform (a sine wave or a pseudo-trapezoidal wave) to an electric motor. A plurality of photo interrupters detect a rotational phase of an electric motor, and a information of rotational speed is detected by an encoder circuit based on a detected signal of the rotational phase of the electric motor. The control unit controls the drive waveform generating unit on the basis of detection information of the rotational phase of the electric motor and performs control so that a phase relationship between the rotational phase of the electric motor and the phase of the drive waveform is kept constant. Furthermore, the control unit sets an amplitude value of the drive waveform generated by the drive waveform generating unit in accordance with a difference between a target speed and the detected information of rotational speed and performs speed control so that a speed of the electric motor is kept constant.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: October 15, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yoshihiro Mizuo
  • Patent number: 10439542
    Abstract: An electric power conversion device includes: a converter circuit which includes a boost chopper; a capacitor which is connected between output terminals of the converter circuit; a boost chopper which boosts a terminal voltage of the capacitor; a multiphase inverter circuit; and a boost chopper controller. In a case where the operation of the boost chopper is continuously stopped, the capacitor has a capacitance allowing the terminal voltage of the capacitor to have a pulse frequency twice as high as that of the AC power source. The multiphase inverter circuit has an output power which is allowed to fluctuate in synchronization with a power source.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: October 8, 2019
    Assignee: Daikin Industries, Ltd.
    Inventors: Tomoisa Taniguchi, Morimitsu Sekimoto, Yasutaka Taguchi
  • Patent number: 10439465
    Abstract: An electric power unit having a heat emitting component includes a battery case provided in an extension direction of an output shaft of the motor, and spaced apart from the motor case, and a cooling fan provided between the battery case and the motor case. The battery case includes a discharge port formed at a position facing the cooling fan, and a suction port provided at a position spaced apart from the discharge port.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: October 8, 2019
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Nobuyuki Kaneko, Shunichiro Sueyoshi
  • Patent number: 10439527
    Abstract: A motor control device includes an energization controller that generates energization control signals of a bridge driver, an ADC that samples and converts analog feedback voltages corresponding to output voltages of the bridge driver into digital feedback signals, and a zero-crossing detector that receives the feedback signals so as to perform zero-crossing detection for determining commutation timing and PWM duty of the energization control signal. Sampling timings of the ADC are switched to one of PWM on period and PWM off period according to the PWM duty. The energization controller PWM drives lower side switches of the bridge driver, and the sampling timings of the ADC are set to the PWM off period. The ADC performs an ADC process of the feedback voltage both in the PWM on period and in the PWM off period, and the zero-crossing detector adopts one of ADC results according to the PWM duty.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: October 8, 2019
    Assignee: Rohm Co., Ltd.
    Inventors: Naoyuki Usagawa, Takahiro Nishiyama
  • Patent number: 10439505
    Abstract: A power module includes a first circuit structure having a first bus substrate. The first bus structure has a first side on which is disposed a first circuit element. A second circuit structure has a second bus substrate and a second side on which is disposed a second circuit element. The first circuit structure and the second circuit structure are oriented in a stacked configuration such that the first side is disposed facing the second side, and the first circuit element partially overlaps the second circuit element. An output bus is disposed between the first circuit structure and the second circuit structure.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: October 8, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Ronald W. Young, Terence G. Ward, Marko Jaksic
  • Patent number: 10439524
    Abstract: A motor driving circuit includes a Hall sensor, an offset detecting circuit, a driving circuit and a back EMF zero point detector. The Hall sensor generates a Hall signal group, the offset detecting circuit detects the first phase changing point of the Hall signal group, and the driving circuit generates the initial phase changing signal in the pre-operation mode according to the Hall signal group. In the correction mode, the driving circuit stops outputting the initial phase changing signal, the back EMF zero detector detects the back EMF zero point, and outputs the back EMF zero point signal. The offset detecting circuit detects a phase difference between the first phase changing point and back EMF zero point, and determines a difference value between the phase difference and a predetermined phase difference. Then, the phase of the Hall signal group is adjusted according to the difference value.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: October 8, 2019
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Chia-Tai Yang, Kun-Min Chen
  • Patent number: 10432130
    Abstract: An electric powertrain includes an electric machine, an inverter connected to the electric machine, and an energy storage system for providing an electric current. The energy storage system includes a first energy storage device operable at a first device voltage, and a second energy storage device operable at a second device voltage. A plurality of low-loss switching devices interconnect the first energy storage device and the second energy storage device. The switching devices are selectively controllable between a first operating mode for providing the electric current at a first system voltage, and a second operating mode for providing the electric current at a second system voltage. The first system voltage is different from the second system voltage.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: October 1, 2019
    Assignee: GM Global Technology Operations LLC
    Inventors: Chandra S. Namuduri, Thomas W. Nehl, Lei Hao
  • Patent number: 10423154
    Abstract: A robot system including a force-controlled pushing device which causes, when a robot is guided and moved, an object provided at a tip end of the robot to be brought into appropriate contact with another object. The robot system includes the robot, the force-controlled pushing device, a robot operation input measuring part, a robot movement command calculating part, a pushing direction setting part, a target pushing force setting part, a force measuring part, and a force-controlled pushing device movement command calculating part. The pushing direction setting part sets a pushing direction of the force-controlled pushing device, based on at least one of: the position/orientation of the first object; a force-controlled pushing device movement command for moving the first object; the position/orientation of the movement mechanism part of the force-controlled pushing device; the position/orientation of the robot; and a robot movement command for moving the robot.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: September 24, 2019
    Assignee: FANUC CORPORATION
    Inventor: Takahiro Iwatake
  • Patent number: 10415965
    Abstract: Systems, apparatus and methods are presented for sensing or estimating a tilt angle, in which a current flowing in an eccentric mass motor is sensed, and a detector circuit assesses the amplitude of a synchronous component of the motor current and provides an output signal or value indicating a tilt angle relative to a gravitational axis at least partially according to the amplitude of the synchronous component of the motor current.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: September 17, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Stephen John Fedigan
  • Patent number: 10411624
    Abstract: The present application is directed to a method and apparatus operable to damp reflected voltage transients in an electric motor drive system. The system includes an inverter, an electrical cable having at least one conducting cable connected to the inverter, and an electric motor connected to the electrical cable. An inner shield is disposed along a length of the at least one conducting cable. A ground line is operable for connecting the inner shield to a ground location through a resistor connected in series therewith.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: September 10, 2019
    Assignee: ABB Schweiz AG
    Inventors: Joseph von Sebo, Peter M. Stipan, Trevor E. Deacon
  • Patent number: 10411623
    Abstract: Provided are a motor control device and a method for controlling a motor control device. A switching frequency is varied with respect to a control sampling for controlling an inverter, whereby controlling is performed by securing a required control sampling according to a motor speed.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: September 10, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Yonghwa Lee, Donggeun Lee, Jeongeon Oh
  • Patent number: 10408868
    Abstract: In accordance with one aspect of the present disclosure, a motor drive control device is a motor drive control device performing PWM (Pulse Width Modulation) control of a motor, wherein harmonics of a fundamental frequency for PWM control of the motor are included in noise occurring from the motor; the fundamental frequency for PWM control is larger than a frequency corresponding to a bandwidth of a predetermined radio frequency band a communication apparatus uses; and frequencies of continuous harmonic components of the fundamental frequency for PWM control appear before and after the predetermined radio frequency band.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: September 10, 2019
    Assignee: MINEBEA MITSUMI INC.
    Inventors: Shigeki Miyaji, Kazuo Takada, Kei Yamazaki
  • Patent number: 10404134
    Abstract: A motor is provided that is capable of eliminating the need to prepare (develop, manufacture, or possess) motor bodies and rotary encoders of multiple different specifications by facilitating connections to motor bodies or rotary encoders having different contact positions. In a motor 1 including a motor body and a rotary encoder, the motor body includes a motor body side connector with a motor body side contact and the rotary encoder includes a rotary encoder side connector with a rotary encoder side contact. The motor body side contact 2 and the rotary encoder side contact are electrically connected. One or both of the motor body side contact and the rotary encoder side contact have a shape extending in a radial direction.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: September 3, 2019
    Assignee: FANUC CORPORATION
    Inventors: Hirosato Yoshida, Nobuyuki Ootake, Keisuke Imai
  • Patent number: 10399224
    Abstract: A gripping system which is monitored based on CEMF and a method for controlling the same includes: using a controller to instruct a drive unit to rotate a stepper motor; using the controller to compare the control instruction with a control parameter matrix stored in an access unit; obtaining a CEMF threshold by checking the position of the actual CEMF in the control parameter matrix; using the controller to continuously monitor the actual CEMF; and using the controller to compare the actual counter electromotive force with the obtained corresponding counter electromotive force threshold, stopping the stepper motor and letting the gripper maintain the gripping status when the actual counter electromotive force is smaller than or equal to the counter electromotive force threshold, and maintaining driving of the stepper motor when the actual counter electromotive force is larger than the counter electromotive force threshold.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: September 3, 2019
    Assignee: Hiwin Technologies Corp.
    Inventors: Chen-Ming Wong, Wei-Shao Chen
  • Patent number: 10404201
    Abstract: A capacitor current estimating unit estimates a capacitor current based on phase currents. A capacitor temperature estimating unit estimates a capacitor temperature based on the capacitor current. A motor controller can accurately estimate not only a temperature of a switching element but also the capacitor temperature based on the phase currents. As a result, the capacitor does not need to have excessive heat characteristics. Further, a current limiting unit limits a current flowing from a battery to an inverter based on the capacitor temperature. Therefore, an amount of temperature change is not over-estimated due to overheating of the capacitor. As a result, excessive current limitation can be avoided and the performance of the motor can be demonstrated.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: September 3, 2019
    Assignee: DENSO CORPORATION
    Inventors: Ryo Kano, Takashi Suzuki
  • Patent number: 10404196
    Abstract: A backflow preventing device includes a backflow preventing element that is connected between a power supply and a load and that prevents electric current from flowing backward from the load side toward the power supply side, and a commutating device that performs a commutation operation for causing the electric current to flow to a commutation path connected in parallel with the backflow preventing element. A plurality of elements including at least one or more of elements constituting the commutating device are configured as a module, so that, for example, the device can be reduced in size. Moreover, a simplified heat-dissipation design and a simplified air-duct design can be achieved.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: September 3, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takuya Shimomugi, Koichi Arisawa, Takashi Yamakawa, Keisuke Uemura, Noriyuki Matsubara, Shinsaku Kusube, Kenta Yuasa, Akihiro Tsumura