Patents Examined by David Luo
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Patent number: 11791750Abstract: A power tool includes a housing, a brushless motor disposed inside the housing, and a controller. The controller is configured to receive power-off signals and power-on signals. Upon receiving a power-on signal, the controller is further configured to receive a time signal indicative of a time interval from the last power-off signal to the current power-on signal. The controller is further configured to determine whether the time interval is greater than or equal to a first time threshold and less than a second time threshold, and brake the motor before start-up if the time interval is greater than or equal to the first time threshold and less than the second time threshold.Type: GrantFiled: December 23, 2021Date of Patent: October 17, 2023Assignee: Nanjing Chervon Industry Co., Ltd.Inventors: Zhen Xu, Junya Duan, Jifeng Feng
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Patent number: 11784597Abstract: An output control system includes a first power controller controlling an output of a first power source, a second power controller controlling an output of a second power source, and a controller determining a control mode based on a state of a motor and controlling one or both of the first power controller and the second power controller based on the control mode.Type: GrantFiled: June 6, 2022Date of Patent: October 10, 2023Assignee: Hyundai Mobis Co., Ltd.Inventor: Yong Hee Lee
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Patent number: 11777437Abstract: A method of operating a multi-phase electric machine includes operating a six-phase machine with six phases that are configured into a first group having a first neutral connection and a second group having a second neutral connection. The method also includes determining whether at least one of the six phases is experiencing a fault. In response to the determining, the method includes combining the first and second neutral connections to form a common neutral connection to continue operating the six-phase machine by using the remaining phase not experiencing the fault.Type: GrantFiled: July 20, 2020Date of Patent: October 3, 2023Assignee: CUMMINS INC.Inventors: Akm Arafat, Dakshina S. Murthy-Bellur
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Patent number: 11777430Abstract: A motor drive control device includes: a feedback control unit calculating an operation amount (Sad) of a motor such that a rotation speed S3 of the motor matches a target rotation speed S1; a drive control signal generation unit generating a drive control signal Sd based on the operation amount Sad; a current fluctuation detection unit detecting a fluctuation of a current flowing through the motor; a correction instruction unit instructing correction of the operation amount Sad when the fluctuation of the current flowing through the motor is detected by the current fluctuation detection unit; and a correction unit correcting the operation amount Sad and providing the corrected operation amount S2 to the drive control signal generation unit when the correction of the operation amount Sad is instructed from the correction instruction unit.Type: GrantFiled: April 15, 2022Date of Patent: October 3, 2023Assignee: MINEBEA MITSUMI Inc.Inventors: Takahiro Suzuki, Masato Aoki, Hiroyuki Kaidu
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Patent number: 11777388Abstract: A transport system includes: a mover having a first magnet group arranged in parallel to a first direction and a second magnet group arranged in parallel to a second direction crossing the first direction; and a plurality of coils arranged in parallel to the first direction so as to be able to face the first magnet group and the second magnet group, and the mover is able to move in the first direction along the plurality of coils by electromagnetic force received by the first magnetic group from the plurality of coils while an attitude of the mover is controlled by electromagnetic force received by the first magnetic group or the second magnetic group from the plurality of coils.Type: GrantFiled: May 5, 2022Date of Patent: October 3, 2023Assignee: CANON KABUSHIKI KAISHAInventor: Takeshi Yamamoto
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Patent number: 11764711Abstract: A motor control apparatus includes an excitation unit and a control unit. The excitation unit includes switching elements connected to a power supply and to different motor coils. The excitation unit excites an excitation phase targeted for excitation among motor excitation phases by the control unit driving the switching elements. When the excitation phases are excited, the control unit drives, in a first time period and based on a first PWM signal, a first switching element connected to a first phase coil corresponding to a first phase of the excitation phase targeted for excitation and, in a second time period and based on a second PWM signal, drives a second switching element connected to a second phase coil corresponding to a second phase of the excitation phase. The control unit controls outputting a duty ratio of the second PWM signal to the second switching element in the second time period.Type: GrantFiled: June 7, 2021Date of Patent: September 19, 2023Assignee: Canon Kabushiki KaishaInventors: Takuya Miyashita, Eijiro Ohashi, Yasukazu Maeda
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Patent number: 11764650Abstract: The present disclosure discloses a feeding apparatus, which includes a motor, a driving unit, and a noise reduction module. The noise reduction module includes an audio receiving unit and a control unit. The audio receiving unit receives the sound generated by the feeding apparatus when the motor is running. The control unit is electronically connected to the driving unit and the audio receiving unit. The control unit sequentially supplies a plurality of motor drive data to the driving unit to drive the motor to run. The control unit sequentially receives a plurality of sound signals corresponding to those motor drive data from the audio receiving unit. The control unit analyzes the sound signals and selects one of the sound signals as an optimized sound signal. The control unit stores the motor drive data corresponding to the optimized sound signal as a setting motor drive data.Type: GrantFiled: January 6, 2021Date of Patent: September 19, 2023Assignee: CHICONY ELECTRONICS CO., LTD.Inventors: Shang-Yuan Yuan, Tung-Hsin Huang
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Patent number: 11764714Abstract: The invention relates to a method (400) for regulating an electric machine (190), comprising at least one first filter (140) and at least one second filter (142, 144). The method has the steps of: ascertaining (410) a feedback variable (Idq); filtering (412) a specifiable GW matching variable (Idq*); ascertaining (414) the filtered feedback variable without fundamental components (IdqWo-Funda); filtering (416) the filtered feedback variable without fundamental components (IdqWo-Funda); ascertaining (418) a filtered feedback variable without harmonic components (IdqFunda); and energizing (480) at least one winding of the electric machine (190) on the basis of the filtered feedback variable without harmonic components (IdqFunda).Type: GrantFiled: October 21, 2020Date of Patent: September 19, 2023Assignee: Robert Bosch GmbHInventors: Sebastian Paulus, Michele Hirsch, Wei-Lung Lee
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Patent number: 11757385Abstract: A motor control system includes a motor, an encoder, and a controller including a controller transmitter configured to transmit a torque command to control the motor. The encoder includes a position detector configured to detect a rotational position of the motor, an encoder receiver configured to receive the torque command from the controller transmitter, first disturbance estimating circuitry configured to estimate a first disturbance torque based on the rotational position and the torque command, and an encoder transmitter configured to transmit the rotational position and the first disturbance torque to the controller.Type: GrantFiled: July 28, 2021Date of Patent: September 12, 2023Assignee: KABUSHIKI KAISHA YASKAWA DENKIInventors: Keita Shimamoto, Koji Uemura
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Patent number: 11757392Abstract: Provided are a controller and a program with which it is possible to easily output the state of mechanical loss in an induction motor. A controller for controlling industrial machinery that has an induction motor comprises: an electric power cutoff unit that cuts off the supply of electric power to the induction motor; a speed acquisition unit that acquires the speed of the induction motor; an acceleration calculation unit that calculates acceleration on the basis of the acquired speed; a moment-of-inertia acquisition unit that acquires the moment of inertia of a spindle of the induction motor; a mechanical loss calculation unit that calculates mechanical loss in the induction motor on the basis of the acquired speed, the calculated acceleration, and the acquired moment of inertia; and an output unit that outputs the calculated mechanical loss.Type: GrantFiled: March 1, 2021Date of Patent: September 12, 2023Assignee: FANUC CORPORATIONInventor: Junichi Tezuka
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Patent number: 11757384Abstract: A plural-fans driving apparatus is provided to drive a first fan and a second fan, and the first fan and the second fan are three-phase fans. The plural-fans driving apparatus includes a controller, a first three-phase motor driver structure, a second three-phase motor driver structure, and a protection and input interface circuit. The protection and input interface circuit is coupled to the first three-phase motor driver structure and the second three-phase motor driver structure, and protects the first three-phase motor driver structure and the second three-phase motor driver structure. The controller controls the first three-phase motor driver structure to drive the first fan, and controls the second three-phase motor driver structure to drive the second fan.Type: GrantFiled: July 20, 2022Date of Patent: September 12, 2023Assignee: DELTA ELECTRONICS, INC.Inventors: Kuo-Ying Lee, Feng-Ying Lin, Meng-Yu Chen, Chia-Ching Tsai
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Patent number: 11750139Abstract: In a method and system for operating a system having an energy storage device and a resistor, and in order to discharge the energy storage device, an electric power that is constant over time is continuously supplied to the resistor, e.g., during a time period, e.g., until the resistor has practically been fully discharged, the time period, e.g., being greater than the time constant of the temperature rise of the resistor induced by a continuous electric power that is constant over time and supplied to the resistor.Type: GrantFiled: June 25, 2020Date of Patent: September 5, 2023Assignee: SEW-EURODRIVE GMBH & CO. KGInventors: Wolfgang Halder, Thomas Kühefuß, Georg Pfeiffer
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Patent number: 11749485Abstract: A modular switch apparatus for controlling at least one electric drive includes a mounting rail bus system having a control line and two power supply lines, a power supply device, and a safety relay module that is configured to obtain a first, high level control signal from a DC supply voltage applied to the two power supply lines and to feed the first control signal to the control line via the first bus interface if the emergency stop command device has not been actuated. Furthermore, at least one safety motor starter module is provided, which includes a processing device with an input that can be electrically connected to the control line via a bus interface. The processing device is adapted to evaluate a first, high level control signal as transferred via the control line and to provide control signals for controlling the at least two switch devices.Type: GrantFiled: November 26, 2019Date of Patent: September 5, 2023Assignee: Phoenix Contact GmbH & Co. KGInventors: Stephan Hansmeier, Bernd Schulz, Matthias Ragaller, Dirk Plewka
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Patent number: 11750133Abstract: A control system may include: a motor configured to power a driven object; and circuitry configured to: generate a first driving force command to drive the motor during a first control; estimate a first force acting on the motor during the first control based, at least in part, on the first driving force command; generate a second driving force command to drive the motor during a second control after the first control; estimate a second force acting on the motor during the second control based, at least in part, on the second driving force command; and estimate an external force acting on the driven object during the second control based, at least in part, on a comparison between the first force and the second force.Type: GrantFiled: January 13, 2022Date of Patent: September 5, 2023Inventors: Keita Shimamoto, Tsuyoshi Yokoya
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Patent number: 11750140Abstract: An example system includes an electric machine, an alternating current (AC)/direct current (DC) converter, a Y-capacitor, and a controller. The AC/DC converter being connected to the electric machine and having a DC side and an AC side. The Y-capacitor is located on the DC side of the AC/DC converter. The controller is configured to determine, based on a measurement of the DC side of the AC/DC converter, an occurrence of a ground fault on the AC side of the AC/DC converter, and control, based on the occurrence of the ground fault, operation of the AC/DC converter.Type: GrantFiled: April 28, 2022Date of Patent: September 5, 2023Assignees: Rolls-Royce Singapore Pte. Ltd., Rolls-Royce CorporationInventors: Chandana Jayampathi Gajanayake, Shuai Wang, David Russell Trawick
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Patent number: 11750131Abstract: A motor drive method is a method of driving a motor by a motor drive apparatus. The motor drive apparatus includes an inverter that regulates supplied power to the motor that is a position sensorless synchronous machine, and includes a controller that outputs a control signal to control the inverter. The method includes reducing output torque of the motor to be less than maximum output torque, in a speed range that is lower than a first speed at which the motor rotates. The maximum torque that is output from the motor is the maximum output torque in a case the motor drive apparatus drives the motor.Type: GrantFiled: September 29, 2020Date of Patent: September 5, 2023Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Takahiro Yokoyama, Takayuki Miyajima
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Patent number: 11750128Abstract: An external force estimation device is configured to estimate an external force acting on a motor. The external force estimation device includes a processor. The processor is configured to: calculate an output torque of the motor by using a value of a current supplied to the motor; estimate an inertia torque of the motor by using rotational position information of the motor; estimate a first friction torque of the motor by using the rotational position information of the motor; perform temperature-based correction for the first friction torque by using temperature information of the motor; and estimate the external force by subtracting the inertia torque and the first friction torque after the temperature-based correction from the output torque.Type: GrantFiled: June 7, 2022Date of Patent: September 5, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Taro Takahashi, Akira Hatano, Naoki Mima
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Patent number: 11750122Abstract: A motor drive control device capable of determining a drive state of a motor is provided. The motor drive control device includes a plurality of motor drive circuits performing, based on drive control signals (Sca1 and Sca2) for controlling the number of rotations of a motor, control of energization of the motor and outputting FG signals (fg1 and fg2) having a cycle corresponding to the actual number of rotations of the motor, a composite signal generation circuit receiving an input of each of the FG signals output from the motor drive circuits and generating a composite signal by combining input signals, and a drive control circuit generating, based on a speed command signal indicating a target number of rotations of the motor, the drive control signals and outputting the drive control signals to each of the motor drive circuits. The FG signals output from the motor drive circuits have a phase difference from each other.Type: GrantFiled: January 22, 2021Date of Patent: September 5, 2023Assignee: MINEBEA MITSUMI Inc.Inventors: Yuuya Hisatomi, Toshihiro Tamitsuji, Hidetoshi Hijikata
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Patent number: 11742786Abstract: The invention relates to a method for controlling an inverter which is electrically connected to an electric motor, having the following steps: defining a modulated voltage (S1) for the inverter, said voltage being based on a first switching frequency, for operating the electric motor with a current, wherein the current has an electric frequency; determining the electric frequency (S2); changing the first switching frequency (S4) on which the modulated voltage is based to a second switching frequency if a value pair consisting of electric frequency and first switching frequency, or a value pair consisting of electric frequency and a sideband of the first switching frequency, is within at least one defined disturbance range (S3).Type: GrantFiled: January 13, 2020Date of Patent: August 29, 2023Assignee: Robert Bosch GmbHInventors: Thomas Zeltwanger, Wolfgang Michael Bischof
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Patent number: 11742783Abstract: A motor apparatus for a switch drive of an electric switch has an electric motor and a control apparatus for controlling the electric motor. The control apparatus has a power supply device for the electrical power supply of the electric motor. The electric power supply has a rectifier unit, a voltage measurement unit for detecting the supply voltage or a rectifier output voltage of the rectifier unit, a switch unit for generating a drive voltage for the electric motor from the supply voltage or from the rectifier output voltage, and a control unit for controlling the switch unit as a function of the supply or rectifier output voltage detected. Accordingly, the motor apparatus has a motor housing which, besides the electric motor, houses part of the power supply device and/or at least part of the control unit.Type: GrantFiled: November 15, 2019Date of Patent: August 29, 2023Assignee: Siemens Energy Global GmbH & Co. KGInventors: Thomas Hilker, Lutz-Ruediger Jaenicke