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1. (WO2018203387) ELECTRIC MOTOR CONTROL APPARATUS

Pub. No.:    WO/2018/203387    International Application No.:    PCT/JP2017/017258
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Wed May 03 01:59:59 CEST 2017
IPC: H02P 21/18
H02P 21/22
H02P 21/24
H02P 21/34
H02P 25/026
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
Inventors: KAWAMURA, Satoshi
川村 敏
ONISHI, Yoshitaka
大西 良孝
Title: ELECTRIC MOTOR CONTROL APPARATUS
Abstract:
During a time period from start of activation of a permanent magnet synchronous electric motor (4) to completion of the activation, an activation control unit (17) calculates an α-axis induced voltage (Eα) and a β-axis induced voltage (Eβ) on the basis of an α-axis current (Iα) and a β-axis current (Iβ) obtained by a triaxial/biaxial conversion unit (12) converting currents (Iu, Iv, and Iw) of three-phase winding wires (4u, 4v, 4w), and switches an α-axis command value (Iα*) and a β-axis command value (Iβ*) according to the α-axis induced voltage (Eα) and the β-axis induced voltage (Eβ).