公开(公告)号：US10516354B2

公开(公告)日：2019-12-24

申请号：US16084799

申请日：2017-02-24

Applicant: Sanden Automotive Components Corporation

Inventor： Takeo Tsukamoto ,  Masafumi Hotta ,  Daisuke Hirono

IPC: H02P6/182

Abstract: To provide a motor control device capable of determining a rotor position with high accuracy not only in normal control but also in flux-weakening control. The motor control device includes: a first rotor position determining unit 28 that determines a rotor position of a synchronous motor by using a rotor position calculation formula with, as parameters, current electrical angle or induced voltage electrical angle, and first current phase or first induced voltage phase obtained based on current peak value and [(induced voltage electrical angle)−(current electrical angle)]; a second rotor position determining unit 29 that determines a rotor position of the synchronous motor by using a rotor position calculation formula with, as parameters, current electrical angle or induced voltage electrical angle, and second current phase or second induced voltage phase obtained based on current peak value and flux linkage of a rotor of the synchronous motor; and a selecting unit 30 that selects the first or second rotor position determining unit 28, 29.