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公开(公告)号:US20240056016A1
公开(公告)日:2024-02-15
申请号:US18365459
申请日:2023-08-04
Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
Inventor: Takuya NARUSE , Shunsuke AMBO , Takashi OGAMI
Abstract: An electric motor device includes an electric motor, an inverter, a noise reducer, a control unit, and a metal housing. The controller controls switching elements using a PWM signal generated from a voltage instruction value and a carrier frequency. The control unit includes a calculation portion that calculates a modulation factor of the voltage instruction value and a setting portion that sets the carrier frequency in accordance with the modulation factor. The carrier frequency set by the setting portion is higher when the modulation factor is less than a predetermined modulation factor than when the modulation factor is greater than or equal to the predetermined modulation factor.
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公开(公告)号:US20210367545A1
公开(公告)日:2021-11-25
申请号:US17322049
申请日:2021-05-17
Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
Inventor: Takashi OGAMI , Takashi KAWASHIMA
Abstract: An inverter controller is used to control an inverter circuit, which drives a vehicle on-board electric motor using a vehicle on-board electricity storage device. A rotation controlling unit of the inverter controller executes a process that derives two-phase voltage command values based on an external command value delivered from an external device and an actual rotation speed, and a process that derives three-phase voltage command values based on the two-phase voltage command values. In a case in which a voltage utilization factor is less than or equal to a utilization factor threshold, the rotation controlling unit derives, by switching at a switching period, sets of three-phase voltage command values of which the line voltages of the vehicle on-board electric motor are the same and the variation ranges are different.
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公开(公告)号:US20210249984A1
公开(公告)日:2021-08-12
申请号:US17168688
申请日:2021-02-05
Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
Inventor: Takashi KAWASHIMA , Takashi OGAMI , Yoshiki NAGATA
Abstract: An inverter controller is configured to control an inverter circuit that drives an on-vehicle electric motor by using an on-vehicle electricity storage device. The inverter controller includes a two-phase voltage command value deriving unit that derives two-phase voltage command values on the basis of an external command value delivered from an external device and an acquisition result of a speed acquiring unit, and a three-phase voltage command value deriving unit that derives three-phase voltage command values on the basis of the two-phase voltage command values. The three-phase voltage command value deriving unit derives the three-phase voltage command values on the basis of a voltage utilization factor, which is calculated on the basis of the two-phase voltage command values and the acquisition result.
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