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1. (WO2018080996) CLOSED LOOP FLUX WEAKENING FOR PERMANENT MAGENT SYNCHRONOUS MOTORS

Pub. No.:    WO/2018/080996    International Application No.:    PCT/US2017/057873
Publication Date: Fri May 04 01:59:59 CEST 2018 International Filing Date: Tue Oct 24 01:59:59 CEST 2017
IPC: H02P 21/00
Applicants: MICROCHIP TECHNOLOGY INCORPORATED
Inventors: KULKARNI, Prasad
KANKANALA, Ramesh
DEB, Debraj
Title: CLOSED LOOP FLUX WEAKENING FOR PERMANENT MAGENT SYNCHRONOUS MOTORS
Abstract:
A closed loop flux weakening method and apparatus are provided. The closed loop flux weakening apparatus may include a difference circuit that obtains a difference between a q-axis reference voltage and a q-axis voltage, a controller that converts the difference between the q- axis reference voltage and the q-axis voltage into a d-axis current of a stator of the motor, and a summation circuit that obtains a d-axis reference current by adding the d-axis current of the stator of the motor and a feed forward d-axis current of the stator of the motor.