Affiliation of Author(s):自动化学院
Journal:IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING
Key Words:improved SRFF SMO phase shift
Abstract:In view of the relatively low estimation accuracy in the low-pass filter (LPF)-based sliding mode observer (SMO) method, synchronous reference frame filter (SRFF)-based SMO (without input LPF) method, and SRFF-based SMO (with input LPF) method, an improved SRFF-based SMO position sensorless method of the open-winding permanent magnet generator (OWPMG) system is presented. This improved SRFF consists of a programmable eighth-order low-pass filter (8th-PLPF), a traditional SRFF, and two phase-locked loops (PLL1 and PLL2). Based on the synchronous angular frequency obtained by PLL2, the 8th-PLPF together with the traditional SRFF can not only effectively filter out the harmonics in the output of the SMO but also achieve the fundamental back-EMF without magnitude and phase angle errors. Then, based on the obtained accurate back-EMF, the estimated rotor position angle can be obtained without phase shift. The OWPMG system using the improved method can work well in both steady-state and dynamic conditions, which is verified by experimental results. (c) 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
ISSN No.:1931-4973
Translation or Not:no
Date of Publication:2019-06-01
Co-author:Hao, Wenjuan
Correspondence Author:王宇
Date of Publication:2019-06-01