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Patent Agency Ranking
公开(公告)号：US20200212829A1
公开(公告)日：2020-07-02
申请号：US16639089
申请日：2018-05-14
Applicant: Sinfonia Technology Co., Ltd.
Inventor： Makoto Maruyama
Abstract: A control device 1 for a synchronous electric motor that switches a drive control of the synchronous electric motor to a PWM drive control and a rectangular wave drive control includes a PWM signal generator 14 configured to generate a PWM signal, a rectangular wave signal generator 22 configured to generate a rectangular wave signal, a rotation speed detector 40 configured to detect a rotation speed of the motor 2, a signal switching determination part 50 configured to determine, according to at least the rotation speed, whether the PWM signal or the rectangular wave signal is used as a control signal when controlling the drive of the motor 2, and a drive controller 30 configured to control the drive of the motor 2 using a signal determined by the signal switching determination part 50 to be used as the control signal.
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公开(公告)号：US10985678B2
公开(公告)日：2021-04-20
申请号：US16607529
申请日：2017-10-30
Applicant: SINFONIA TECHNOLOGY CO., LTD.
Inventor： Kazunari Kanazawa , Takeshi Tomizaki , Nobumasa Usiro , Makoto Maruyama , Yuji Ogawa
Abstract: A motor control apparatus includes: a motor drive control section that controls driving of a motor using a predetermined phase; a rotation position detecting section that, at every 180 degrees of an electrical angle of the motor, outputs two kinds of detection signals according to the rotation position of the rotor of the motor; a stopped position estimating section that estimates the stopped position at the start of rotation of the rotor using an elapsed time from when rotation the rotor starts until the kind of the detection signal outputted from the rotation position detecting section switches; a rotational speed estimating section that estimates the rotational speed of the rotor using the elapsed time and the stopped position; and an estimated phase calculating section that calculates an estimated phase as the aforementioned predetermined phase using the rotational speed.
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公开(公告)号：US11296625B2
公开(公告)日：2022-04-05
申请号：US16639089
申请日：2018-05-14
Applicant: Sinfonia Technology Co., Ltd.
Inventor： Makoto Maruyama
Abstract: A control device 1 for a synchronous electric motor that switches a drive control of the synchronous electric motor to a PWM drive control and a rectangular wave drive control includes a PWM signal generator 14 configured to generate a PWM signal, a rectangular wave signal generator 22 configured to generate a rectangular wave signal, a rotation speed detector 40 configured to detect a rotation speed of the motor 2, a signal switching determination part 50 configured to determine, according to at least the rotation speed, whether the PWM signal or the rectangular wave signal is used as a control signal when controlling the drive of the motor 2, and a drive controller 30 configured to control the drive of the motor 2 using a signal determined by the signal switching determination part 50 to be used as the control signal.
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公开(公告)号：US11196373B2
公开(公告)日：2021-12-07
申请号：US16646719
申请日：2018-05-14
Applicant: Sinfonia Technology Co., Ltd.
Inventor： Makoto Maruyama
Abstract: There is provided a control device for a synchronous electric motor that controls a drive of the synchronous electric motor. The control device includes: a limit value setting part configured to set a limit value for an output torque related value that is related to an output torque of the synchronous electric motor according to a rotation speed of the synchronous electric motor; a command generator configured to generate a voltage command based on an input command and the limit value without feeding back a current flowing through the synchronous electric motor; a PWM signal generator configured to generate a PWM signal for controlling the drive of the synchronous electric motor based on the voltage command; and a drive controller configured to control the drive of the synchronous electric motor using the PWM signal.
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公开(公告)号：US10931215B2
公开(公告)日：2021-02-23
申请号：US16607449
申请日：2017-10-30
Applicant: SINFONIA TECHNOLOGY CO., LTD.
Inventor： Kazunari Kanazawa , Takeshi Tomizaki , Nobumasa Usiro , Makoto Maruyama , Yuji Ogawa
Abstract: A motor control apparatus 1 includes a fixed phase setting section that sets a fixed phase of a motor according to a detection signal. At the start of rotation of a rotor, the fixed phase setting section sets a first fixed phase that is equal to or greater than −90 degrees relative to a stable stopping point at a maximum electrical angle and is equal to or less than 90 degrees relative to a stable stopping point at a minimum electrical angle of the rotor as the fixed phase, and sets a second fixed phase that is equal to or greater than −90 degrees relative to a stable stopping point at a maximum electrical angle and is equal to or less than 90 degrees relative to a stable stopping point at a minimum electrical angle of the rotor.
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