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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：US10917028B2
公开(公告)日：2021-02-09
申请号：US16509679
申请日：2019-07-12
申请人： MINEBEA MITSUMI Inc.
发明人： Xiao Zhou , Hiroyuki Kaidu , Masato Aoki , Mitsunari Terada
摘要： A motor driving control device has a motor driving unit configured to selectively energize coils with a plurality of phases of a motor, a control circuit unit configured to control an operation of the motor driving unit by outputting a driving control signal to the motor driving unit, and a position detector configured to output a position signal which corresponds to any one phase of the plurality of phases and a phase of which changes depending on a position of a rotor of the motor. the control circuit unit detects a transition of values of a back electromotive force induced in the one phase in a detection period corresponding to a change timing of the position signal when beginning to start up the motor, and determines a rotational state of the motor including a rotational direction of the motor based on a detection result of the transition of the values of the back electromotive force.
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公开(公告)号：US10715060B2
公开(公告)日：2020-07-14
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：US10944344B2
公开(公告)日：2021-03-09
申请号：US16580608
申请日：2019-09-24
申请人： MINEBEA MITSUMI Inc.
发明人： Hiroyuki Kaidu , Mitsunari Terada , Xiao Zhou
IPC分类号： H02P6/15
摘要： An abnormality determination device has a detection unit configured to detect a change in a phase of a position signal, the phase of the position signal changing depending on a rotation of a rotor of a motor, a time measurement unit configured to measure a time depending on a detection timing of the detection of the change in the phase of the position signal, a comparison unit configured to compare a first time measured by the time measurement unit with a second time measured before the first time is measured, and a determination unit configured to determine that a drive state of the motor is abnormal based on a comparison result of the comparison of the first time with the second time.
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公开(公告)号：US12104609B2
公开(公告)日：2024-10-01
申请号：US18536691
申请日：2023-12-12
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：US10236804B2
公开(公告)日：2019-03-19
申请号：US15898735
申请日：2018-02-19
申请人： Minebea Mitsumi Inc.
发明人： Hiroyuki Kaidu , Youhei Serizawa , Masato Aoki , Xiao Zhou
IPC分类号： H02P6/08 , H02P6/17 , H02P21/14 , H02P27/08 , H02P29/024 , H02P29/032
摘要： The control circuit includes a current detecting part detecting a driving current of the motor, a set duty generating part generating a set duty for outputting the driving control signal based on the speed command information and the actual rotational frequency information, a limit value determining part determining a current limit value based on the set duty and an instructed duty corresponding to the speed command information and a limiting part limiting the driving current of the motor based on the driving current of the motor detected by the current detecting part and the current limit value determined by the limit value determining part.
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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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