Inverter Nonlinearity Compensation for SPMSM Sensor-less Control Based on Second-order Generalized Integrator

Affiliation of Author(s):自动化学院

Journal:Zhongguo Dianji Gongcheng Xuebao

Abstract:In surface-mounted permanent magnet synchronous motor (SPMSM) sensor-less control based on high-frequency (HF) pulsating voltage injection, inverter nonlinearity gives rise to 6th harmonic error in the estimated position. Firstly, this very error was theoretical analyzed. Secondly, an inverter nonlinearity compensation strategy using second-order generalized integrator (SOGI) was proposed. The SOGI was adopted in HF signal extraction and harmonic error elimination. Thirdly, an error feed-forward compensator was used in the position PLL to compensate for the signal delay caused by 2 integrators. Lastly, the experimental results demonstrated the feasibility of the proposed strategy by a 1.5kW-SPMSM vector controlled system. © 2018 Chin. Soc. for Elec. Eng.

ISSN No.:0258-8013

Translation or Not:no

Date of Publication:2018-06-05

Co-author:刘兵,倪天恒

Correspondence Author:Bo Zhou

Date of Publication:2018-06-05