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公开(公告)号：US11901851B2
公开(公告)日：2024-02-13
申请号：US17660041
申请日：2022-04-21
申请人： MINEBEA MITSUMI Inc.
发明人： Masato Aoki , Hiroyuki Kaidu , Wataru Nogamida , Syu Hayashi , Takahiro Asami
CPC分类号： H02P6/153
摘要： A motor drive control device 1_2 includes a target point determination unit 12_2 determining a target point P of zero crossing of a coil current Iu of a U phase based on a position detection signal Shu, a current zero crossing point estimation unit 14_2 estimating a zero crossing point Q of the coil current Iu of the U phase by detecting a change in a current direction of the coil current Iu of the U phase at a predetermined timing in every cycle of a PWM signal, an adjustment instruction signal generation unit 19_2 generating at least one of a phase adjustment instruction signal Sp for instructing phase adjustment of the coil current Iu and a frequency adjustment instruction signal Sf for instructing frequency adjustment of the PWM signal according to a phase difference Δφ between the target point P and the zero crossing point Q such that the phase difference is within a predetermined range, and a drive control signal generation unit 16_2 generating a drive control signal Sd based on at least one of the phase adjustment instruction signal Sp and the frequency adjustment instruction signal Sf.
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公开(公告)号：US11114961B2
公开(公告)日：2021-09-07
申请号：US16783271
申请日：2020-02-06
申请人： MINEBEA MITSUMI Inc.
发明人： Hiroyuki Kaidu , Wataru Nogamida , Masato Aoki
摘要： A motor driving control device includes a motor driving unit, a position detection unit, a current detection unit and a control unit. The control unit includes a change detecting means configured to detect a predetermined phase change in the position signal, a first switching means configured to sequentially switch energization patterns of the coils with the plurality of phases based on a timing when the phase change is detected, and a second switching means configured to, in a state where the change detecting means does not detect the phase change, when a value of the drive current becomes a predetermined first threshold or more during a monitoring time period after a timing when the predetermined phase change in the position signal is expected, perform an operation to forcibly switch to a next energization pattern regardless of the timing of switching the energization pattern by the first switching means.
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公开(公告)号：US10749452B2
公开(公告)日：2020-08-18
申请号：US16241110
申请日：2019-01-07
申请人： MINEBEA MITSUMI Inc.
发明人： Hiroyuki Kaidu , Masato Aoki , Xiao Zhou , Mitsunari Terada
摘要： A motor driving system has a first motor, a first motor driving control device for driving the first motor, a second motor, a second motor driving control device for driving the second motor, a controller performing communication with the first motor driving control device and the second motor driving control device, a first communication line for connecting a common terminal of the controller and the first motor driving control device; a second communication line for connecting the common terminal and the second motor driving control device, and a switch unit capable of switching each of the first and second communication lines between an enable state in which communication is possible by the communication line and an disable state in which communication is impossible under control of the controller. The controller controls the switch unit to set either the first or the second communication line to the enable state.
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公开(公告)号：US20180159450A1
公开(公告)日：2018-06-07
申请号：US15831776
申请日：2017-12-05
申请人： Minebea Mitsumi Inc.
发明人： Masato Aoki , Hiroyuki Kaidu , Youhei Serizawa
摘要： A motor drive controller includes: a motor drive unit; and a lock energization control circuit configured to control the motor drive unit to cause a lock current for holding the rotor at a predetermined lock position to flow from the motor drive unit to the drive coils for lock energization duration before rotation of the motor is started. The lock energization control circuit includes: a first lock energization unit that controls the motor drive unit such that a magnitude of the lock current becomes a first predetermined value when first predetermined duration has elapsed after the lock energization duration is started; and a second lock energization unit that controls the motor drive unit such that the magnitude of the lock current becomes a second predetermined value smaller than the first predetermined value when the lock energization duration is terminated after the first predetermined duration has elapsed.
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公开(公告)号：US12092122B2
公开(公告)日：2024-09-17
申请号：US17274582
申请日：2019-09-04
申请人： MINEBEA MITSUMI Inc.
CPC分类号： F04D25/16 , F04D15/0077 , F04D25/166 , F04D27/004
摘要： A fan includes a first blower and a second blower each having an impeller. The first blower includes a first motor and a first motor drive controller to control driving of the first motor and communicate with the second blower. The second blower includes a second motor and a second motor drive controller to control driving of the second motor and communicate with the first blower. The first motor drive controller controls the driving of the first motor based on a result of communication with the second blower.
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公开(公告)号：US11296641B2
公开(公告)日：2022-04-05
申请号：US17116042
申请日：2020-12-09
申请人： MINEBEA MITSUMI Inc.
发明人： Hiroyuki Kaidu
摘要： A motor drive control apparatus includes a receiving unit configured to receive a target rotation frequency outputted to a motor to be a drive control target of a predetermined plurality of motors from a host apparatus and receive stability information indicating that actual rotation frequencies of the predetermined plurality of motors are stabilized, an advance angle/duty determination unit configured to adjust a drive control signal to control driving of the motor to be a drive control target so that a motor current becomes minimum at the target rotation frequency when the stability information is received, a duty setting unit, an advance angle control unit, a energization controlling unit and a motor drive unit configured to drive the motor to be the drive control target based on the drive control signal.
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公开(公告)号：US10609838B2
公开(公告)日：2020-03-31
申请号：US16168988
申请日：2018-10-24
申请人： MINEBEA MITSUMI Inc.
发明人： Hiroyuki Kaidu , Masato Aoki
摘要： A motor driving control device, together with a controller, included in a motor driving system, has a control circuit controlling drive of a motor according to instruction information transmitted from the controller. The control circuit has a first acquisition unit acquiring setting reference information related to assignment of identification information for the motor driving control device itself, the setting reference information being input from outside, a setting unit setting the motor driving control device's identification information based on a magnitude of a setting voltage input from the outside and the setting reference information, and a second acquisition unit acquiring the instruction information based on the identification information set by the setting unit.
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公开(公告)号：US10530280B2
公开(公告)日：2020-01-07
申请号：US16101599
申请日：2018-08-13
申请人： MINEBEA MITSUMI Inc.
发明人： Hiroyuki Kaidu , Masato Aoki
摘要： A motor driving control device includes a motor driving unit to drive the motor, a rotational position detecting circuit for generating rotational position information, and a controller. The controller outputs, to the motor driving unit, a first drive control signal for controlling an adjustment at a time of energization switching to reduce resonance between a natural frequency of the motor and a rotational component of the motor based on the rotational position information when an actual rotational speed of the motor is equal to or higher than a predetermined rotational speed lower than a target rotational speed, and outputs, to the driving unit, a second drive control signal for controlling regular energization switching without performing the adjustment at the time of energization switching when the actual rotational speed is less than the predetermined rotational speed and a set duty is within an error range of a maximum value.
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9.发明授权公开(公告)号：US11658592B2
公开(公告)日：2023-05-23
申请号：US17244008
申请日：2021-04-29
申请人： MINEBEA MITSUMI Inc.
发明人： Hiroyuki Kaidu , Masato Aoki , Takamichi Kitano , Takahiro Suzuki
IPC分类号： H02P6/182 , H02P6/28 , G05B19/042 , H02P6/16 , H02P27/08
CPC分类号： H02P6/28 , G05B19/042 , H02P6/16 , G05B2219/23399 , H02P27/08
摘要： The present disclosure provides a motor control circuit enabled to change or adjust functions to be implemented to suppress an increase in cycle time during mass production. A motor control circuit according to an exemplary embodiment of the present disclosure is a motor control circuit to control a motor driver including a first non-volatile memory and a second non-volatile memory, and the first non-volatile memory stores a control algorithm and a first parameter group to be used by the control algorithm of the motor control circuit, and the second non-volatile memory is enabled to store a second parameter group to be used by the control algorithm.
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公开(公告)号：US10944351B2
公开(公告)日：2021-03-09
申请号：US16633251
申请日：2018-06-12
申请人： MINEBEA MITSUMI Inc.
发明人： Hiroyuki Kaidu , Yuji Omura , Tomoyuki Suzuki
摘要： A motor drive control device capable of reducing the occurrence of vibration in a simple circuit configuration is provided. The motor drive control device (1) includes a motor drive unit (2) that selectively energizes coils with a plurality of phases (Lu, Lv and Lw) of a motor (20) and a control circuit (4) that outputs a drive control signal (Sd) which is a PWM signal to the motor drive unit (2) and thereby controls driving of the motor (20) while switching energization phases of the coils with the plurality of phases (Lu, Lv and Lw) energized by the motor drive unit (2) in predetermined order. The control circuit (4) executes reduction control to temporarily reduce a duty ratio of the drive control signal (Sd) every time a period of 1/m (m is an integer of 2 or more) of a switching cycle of the energization phases elapses after switching the energization phases.
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