CONTROL METHOD OF IPM MOTOR

Japanese Patent JP3738865

B2

PROBLEM TO BE SOLVED: To avoid a voltage shortage state caused by the voltage decline of a power supply and maintain stable control, by a method wherein, when the output voltage of a DC power converter is lower than an output voltage set value, a d-axis current is controlled in accordance with a d-axis current command which is corrected by adding a d-axis current command correction signal to it.
SOLUTION: When the output voltage Vdc of a DC power converter 108 is lower than an output voltage set value Vdcr, a d-axis current command correction signal Id* is obtained by a voltage controller 125 from a deviation signal between a primary voltage signal V1FB and a primary voltage command value V1*. The d-axis current command correction signal Idx* is added to a d-axis current command Id1* outputted by a dq-axis current command calculator 123 to obtain a d-axis current command Id*, and a d-axis current is controlled in accordance with the d-axis current command Id*. With this constitution, even if an AC power supply voltage is declined, the d-axis current is applied in accordance with the decline of the DC voltage on the output side of the DC converter of a power conversion unit, and the primary induced voltage of an IPM motor is lowered to avoid a voltage shortage state and stable control can be realized.

Naotake Shibata
Toshiaki Idemitsu
Ken Kamei

JP2441897A

January 25, 2006

January 22, 1997

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Yaskawa Electric Co., Ltd.

H02P21/00; H02P21/06; H02P21/08; H02P21/22; H02P23/16; H02P27/04; H02P27/08; (IPC1-7): H02P21/00

JP7322673A
JP4255488A
JP7246000A

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