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公开(公告)号：US11218108B2
公开(公告)日：2022-01-04
申请号：US16905428
申请日：2020-06-18
发明人： Hiroyuki Miyamoto , Kenji Yamashita
摘要： A motor controller includes: a rotation speed measurement portion that measures a rotation speed of a motor; and an energization method switching portion that switches an energization method so that the motor is driven by a 120-degree energization method when a rotation speed of the motor measured by the rotation speed measurement portion is less than or equal to a predetermined threshold value, and the motor is driven by a 150-degree energization method when a rotation speed of the motor measured by the rotation speed measurement portion exceeds the predetermined threshold value.
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公开(公告)号：US10715061B2
公开(公告)日：2020-07-14
申请号：US16382254
申请日：2019-04-12
发明人： Kenji Yamashita
摘要： A motor control device includes: a PWM controller that PWM-controls an inverter driving a three-phase motor and including three arm portions, each including a high-side switching element and a low-side switching element connected in series with each other between a first power supply line and a second power supply line connected to a potential lower than a potential of the first power supply line. In an energizing period and a non-energizing period in a case where the three-phase motor is energized from the first power supply line through the PWM-control of the inverter, during a first predetermined period in the energizing period immediately before transition from the energizing period to the non-energizing period, the PWM controller performs a SWEEP of a signal applied to one of the high-side switching element and the low-side switching element, and performs a synchronous rectification control.
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