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

IPC: H02P27/08 ,  H02K11/02 ,  H02K11/30

CPC classification number: H02P27/08 ,  H02K11/02 ,  H02K11/30

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.

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

IPC: H02P27/08 ,  B60H1/32

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.

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

IPC: H02P27/12 ,  H02P21/18 ,  H02P21/22 ,  B60H1/00

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.