Rotor Angular Position Estimation for Doubly Salient Electro-Magnetic Machine Based on Self-Inductance Rectangle

Affiliation of Author(s):自动化学院

Journal:IECON 2017 - 43RD ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY

Key Words:doubly salient electromagnetic machine (DSEM) rotor angular position estimation self-inductance rectangle, position sensorless startup

Abstract:This paper proposes a novel rotor angular position estimation method based on self-inductance rectangle for doubly salient electro-magnetic motor (DSEM). It starts with injecting three test voltage pulses A+C-, B+A- and C+B- with the same width in order. At the end of each test pulse, the response currents i(ac), i(ba) and i(eb) are sampled and detected to identify the two-phase series inductances L-ac, L-ba and L-cb, respectively. Thus the rotor sector is estimated by comparing L-ac, Lba and L-cb. In further, with finding the geometrical proportional relation in self-inductance rectangle which is composed of two-phase series inductances, the expression of rotor angular position is achieved. Compared with the traditional rotor position estimation method, rotor angular position rather than rotor sector is estimated under the proposed method, higher-accurate commutation with no lag is achieved, so DSEM sensorless startup performance is desired to be improved. Finally, the experiments on a 12/8-pole DSEM validate the correctness and flexibility of the proposed rotor position estimation method.

ISSN No.:1553-572X

Translation or Not:no

Date of Publication:2017-01-01

Co-author:周兴伟

Correspondence Author:Bo Zhou

Date of Publication:2017-01-01