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Sixth-harmonic back-EMF based sensorless control for switched-flux permanent magnet machine.pdf (1.88 MB)

Sixth-harmonic back-EMF based sensorless control for switched-flux permanent magnet machine

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conference contribution
posted on 2017-03-16, 16:09 authored by Tzu-Chi Lin, J.M. Liu, Zi-Qiang Zhu
In switched-flux permanent magnet (SFPM) machines, the 6th-harmonic back electromotive force (EMF) is dominant, whilst the 3rd-harmonic back-EMF is much smaller. This paper proposes several new position estimation methods for sensorless control based on the 6th-harmonic back-EMF. Firstly, by detecting the zero-crossings of the 6th-harmonic back-EMF with/without eliminating the influence of the 3rd-harmonic back EMF, the related rotor positions can be determined precisely at these zero-crossings. However, since the intermediate rotor positions need to be determined by linear interpretation between two zero-crossings, it only exhibits excellent performance under steady state. Furthermore, the continuous rotor position can be estimated from the proposed new observer by utilizing the combined signals of 6th-harmonic back-EMF and flux-linkage, together with a synchronous reference frame filter (SRFF) and harmonic elimination. Experimental validation show that (a) by eliminating the 3rd-harmonic back-EMF effect, the accuracy of the proposed 6th-harmonic back-EMF zero-crossings detection method can be improved, (b) SRFF is effective to minimize the influence of non-constant amplitudes of the 6th-harmonic backEMF and flux-linkage, (c) the comparison between the fundamental, the 3rd-harmonic back-EMF and the proposed method are presented in order to highlight the effectiveness of proposed control strategy under different operating conditions.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

IEEE Vehicle Power and Propulsion Conference

Citation

LIN, T.-C., LIU, J.M. and ZHU, Z.Q., 2016. Sixth-harmonic back-EMF based sensorless control for switched-flux permanent magnet machine. 13th IEEE Vehicle Power and Propulsion Conference (VPPC), Hangzhou, China, 17th-20th October 2016.

Publisher

© IEEE

Version

  • VoR (Version of Record)

Acceptance date

2016-10-17

Publication date

2016

Notes

This paper is closed access. © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.

ISBN

9781509035281

Language

  • en

Location

China