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1. 发明授权

US11563393B2 Control device for rotary apparatus, rotary apparatus, and control method for rotary apparatus 有权
公开(公告)号：US11563393B2
公开(公告)日：2023-01-24
申请号：US17120592
申请日：2020-12-14
申请人： MINEBEA MITSUMI Inc.
发明人： Kazuo Takada , Takayuki Matsui , Haruka Miyaji , Hideo Sano
IPC分类号： H02P8/00 , H02P8/34 , H02K37/24 , H02K11/21 , H02K7/116
摘要： A control device 10 for a rotary apparatus 1 includes a driving circuit 40 configured to apply a driving voltage to a stepping motor 20 that rotates an output gear 74, and a control circuit 30 configured to output, to the driving circuit 40, driving pulses in a number corresponding to a driving target included in a driving command signal from the outside. The control circuit 30 includes a driving-pulse output unit 61 configured to output the driving pulse in the number corresponding to the driving target, a position-information acquiring unit 52 configured to acquire position information from a potentiometer 75 that reads a rotating position of the output gear 74 of the rotary apparatus 1, and a rotation-abnormality determining unit 59 configured to determine, based on the position information acquired by the position-information acquiring unit 52, whether a rotation abnormality has occurred in the rotary apparatus 1.

2. 发明授权

US10530283B2 Motor controller and control method for stepping motor 有权
公开(公告)号：US10530283B2
公开(公告)日：2020-01-07
申请号：US15934281
申请日：2018-03-23
申请人： Minebea Mitsumi Inc.
发明人： Ayaka Shimada , Takayuki Matsui , Kazuo Takada , Haruka Miyaji , Hideo Sano
IPC分类号： H02P8/38 , H02P8/34 , H02P8/10 , H02P8/08 , H02P6/182 , H02P29/60
摘要： A motor controller capable of more reliably starting a stepping motor even if a predetermined drive power is supplied to the stepping motor, and to a control method for the stepping motor is provided. The motor controller driving a stepping motor detects that the stepping motor is in a step-out state after a start operation of the stepping motor is performed. If predetermined determination conditions are satisfied, when it is detected that the stepping motor is in a step-out state, it is determined that a restart operation of the stepping motor is performed, and the stepping motor is restarted.

3. 发明授权

US10408868B2 Motor drive control device and method for determining controlled frequency for motor 有权
公开(公告)号：US10408868B2
公开(公告)日：2019-09-10
申请号：US15912876
申请日：2018-03-06
申请人： Minebea Mitsumi Inc.
发明人： Shigeki Miyaji , Kazuo Takada , Kei Yamazaki
IPC分类号： G01R23/20 , H02P6/28 , G01R23/02 , H02P8/02 , H02P8/12 , H02P27/08 , H02P29/50
摘要： 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.

4. 发明授权

US11381139B2 Motor and rotary apparatus including the same 有权
公开(公告)号：US11381139B2
公开(公告)日：2022-07-05
申请号：US16282724
申请日：2019-02-22
申请人： MINEBEA MITSUMI Inc.
发明人： Haruka Miyaji , Kazuo Takada , Shigeki Miyaji , Takayuki Matsui
IPC分类号： H02K5/22 , H02K11/01 , H02K11/40 , H02K7/116 , H05K1/18
摘要： To provide a motor inhibiting emission of electromagnetic noise (EMC) to the outside and a rotary apparatus including the motor. The rotary apparatus (10) of the present disclosure includes: a housing (20); a motor (40) arranged inside the housing (20); a circuit board (50) arranged inside the housing (20) and electrically connected to the motor (40); and a flexible wiring board (44) electrically connecting the motor (40) to the circuit board (50), the motor (40) including a frame (41a) formed with a conductive member, the frame (41a) electrically connected via the flexible wiring board (44) to a ground of the circuit board (50).

5. 发明授权

US10615725B2 Motor control device and step-out state detection method 有权
公开(公告)号：US10615725B2
公开(公告)日：2020-04-07
申请号：US16281226
申请日：2019-02-21
申请人： MINEBEA MITSUMI Inc.
发明人： Shigeki Miyaji , Hidetoshi Hijikata , Kazuo Takada
IPC分类号： H02P8/38 , H02P8/12 , H02P8/20
CPC分类号： H02P8/38 , H02P8/12 , H02P8/20
摘要： In order to prevent erroneous detection of motor step-out even when the rotational speed of the motor crosses a resonance region of the motor under acceleration and/or deceleration, a motor control device (10) includes a control unit for performing control so as to apply a pulse voltage modulated in pulse width to each of coils of plural phases equipped in a motor (20) and periodically switch the phases of the coil currents flowing through the coils of the plural phases, a back electromotive force measuring unit (126) for providing a stop period for temporarily stopping application of the pulse voltage to a coil of any one phase out of the coils of the plural phases when the direction of a coil current flowing through the coil of the phase switches, and measuring back electromotive force induced in the coil during the stop period, and a step-out state detecting unit for detecting a step-out state when the rotational speed of the motor (20) is not in a resonance region of the motor (20) and the back electromotive force measured by the back electromotive force measuring unit (126) satisfies a predetermined step-out state determination criterion.

6. 发明授权

US10498270B2 Control device for stepping motor and control method for stepping motor 有权
公开(公告)号：US10498270B2
公开(公告)日：2019-12-03
申请号：US15945867
申请日：2018-04-05
申请人： Minebea Mitsumi Inc.
发明人： Koichi Takeda , Kazuo Takada , Shigeki Miyaji , Kei Yamazaki
IPC分类号： H02P8/12 , H02P8/08
CPC分类号： H02P8/12 , H02P8/08
摘要： A control device for a stepping motor gradually increases an absolute value of the excitation current in phase A from when the start until the end of the hold period such that the amount of change in the excitation current per unit time is smaller than or equal to a first predetermined value. From the start of the hold period until a predetermined time elapses, an absolute value of the excitation current in phase B gradually increases such that the amount of change in the excitation current per unit time is smaller than or equal to the first predetermined value. By the end of the hold period after the predetermined time has elapsed, the excitation current in phase B reaches zero. When the hold period ends, one-phase excitation operation starts and the excitation current flows in phase A first with the same polarity as at the end of the hold period.

7. 发明申请

US20190190352A1 MOTOR AND ROTARY APPARATUS INCLUDING THE SAME 审中-公开
公开(公告)号：US20190190352A1
公开(公告)日：2019-06-20
申请号：US16282724
申请日：2019-02-22
申请人： Minebea Mitsumi Inc.
发明人： Haruka MIYAJI , Kazuo Takada , Shigeki Miyaji , Takayuki Matsui
IPC分类号： H02K11/22 , H02K5/22 , H02K7/116 , H02K11/40
CPC分类号： H02K11/022 , H02K5/225 , H02K7/1166 , H02K11/40 , H02K2211/03
摘要： To provide a motor inhibiting emission of electromagnetic noise (EMC) to the outside and a rotary apparatus including the motor. The rotary apparatus (10) of the present disclosure includes: a housing (20); a motor (40) arranged inside the housing (20); a circuit board (50) arranged inside the housing (20) and electrically connected to the motor (40); and a flexible wiring board (44) electrically connecting the motor (40) to the circuit board (50), the motor (40) including a frame (41a) formed with a conductive member, the frame (41a) electrically connected via the flexible wiring board (44) to a ground of the circuit board (50).

8. 发明授权

US10742147B2 Motor control circuit, motor control device, actuator and control method for stepping motor 有权
公开(公告)号：US10742147B2
公开(公告)日：2020-08-11
申请号：US16261719
申请日：2019-01-30
申请人： MINEBEA MITSUMI Inc.
发明人： Kazuo Takada , Takayuki Matsui
IPC分类号： H02P8/14 , H02P29/60 , H02K37/12 , H02K37/24 , H02P8/34
摘要： A motor control circuit includes an input voltage measuring unit, a temperature measuring unit, a speed setting unit, and a speed control unit. The input voltage measuring unit measures an input voltage input to a motor control device. The temperature measuring unit measures the temperature. The speed setting unit sets a target value of driving speed of a stepping motor based on a measurement result of the input voltage measuring unit, a measurement result of the temperature measuring unit and based on a set value of driving speed preset for each of the plural partial areas which are sectioned in a matrix form with a threshold value related to the input voltage and a threshold value related to the temperature. The speed control unit controls the driving speed according to the target value of the driving speed set in the speed setting unit.

9. 发明授权

US10331571B2 Address control circuit capable of setting address rapidly and method of setting address after power-on reset, the address control circuit providing protection against over-voltage 有权
公开(公告)号：US10331571B2
公开(公告)日：2019-06-25
申请号：US15671267
申请日：2017-08-08
申请人： Minebea Mitsumi Inc.
发明人： Kazuo Takada , Shigeki Miyaji , Yoshiaki Motoyama , Yasuyuki Hasegawa
IPC分类号： G06F13/40 , G06F12/1027 , G06F12/06 , G06F13/10 , G11C8/04 , G11C8/06 , G11C7/20 , G11C8/18
摘要： An address control circuit includes a setting terminal connectable to a ground potential, a time constant setting circuit connected to the setting terminal, and a control unit connected to the time constant setting circuit and configured to set an address for serial communication. The time constant setting circuit includes a resistive element disposed between the setting terminal and the control unit and configured to protect the control unit against overvoltage. The control unit outputs a voltage to the time constant setting circuit, and sets an address at a predetermined timing based on the voltage input from the time constant setting circuit when a predetermined time has passed after the output of the voltage is stopped.

10. 发明授权

US11165377B2 Control device for stepping motor and control method for stepping motor 有权
公开(公告)号：US11165377B2
公开(公告)日：2021-11-02
申请号：US16973932
申请日：2019-05-23
申请人： MINEBEA MITSUMI Inc.
发明人： Ayaka Shimada , Kazuo Takada , Kei Yamazaki
IPC分类号： H02P8/30
摘要： A control device for a stepping motor capable of hold control that can smoothly reduce an excitation current at a rotation stopping time of the stepping motor is provided. A control device (10) for a stepping motor (20) causes an excitation current to flow in a plurality of coils to rotate a rotor. The control device (10) includes a driving circuit (40) that applies a driving voltage to the coils, and a control circuit (30) that controls the driving voltage. The control circuit (30) performs hold control to move the rotor to a predetermined stop position by changing a magnitude of the excitation current flowing in the coils so that the magnitude of the excitation current becomes close to a target current value that gradually decreases, in a hold time period at a rotation stopping time of the stepping motor (20). The control circuit (30) sets an operation mode of the driving circuit (40) at an operation mode corresponding to a comparison result of the magnitude of the excitation current and the target current value, of a plurality of operation modes, at each predetermined period in the hold time period. The plurality of operation modes include a charge mode to increase the excitation current and a first attenuation mode to attenuate the excitation current.

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