A Sensorless Vector Control Scheme with High Bandwidth Current Loop for Surface Mounted Permanent Magnet Synchronous Machine Based on High Frequency Square Wave Type Voltage Injection

DOI

10.2991/msbda-19.2019.64How to use a DOI?

Keywords

Surfaced-mounted permanent magnet synchronous motor, Sensorless vector control system, High frequency square wave voltage injection, Rotor position observer, Stator flux observer, High bandwidth current loop

Abstract

Thanks to stator flux based observer running at middle and high speed and various high frequency injection (HFI) methods operating in zero and low speed region, position sensorless field oriented vector control system of permanent-magnet synchronous machine (PMSM) has attracted much attention. Nowadays, Most of HFI methods adopt sinusoidal type voltage at high frequency as injection signal, its frequency being one-tenth of PWM switching frequency or so. Restricted by low pass filters (LPFs) and/or band pass filters (BPFs) used, the control system is implemented with narrow current loop bandwidth and high-frequency audible noise. In order to solve these problems, this paper proposes a new HFI method based on square wave, with its injection frequency equivalent to PWM switching one. Also LPFs and BPFs are replaced with a new demodulation method and then rotor position and velocity can be estimated with rotor position observer. To validate the proposed scheme, a prototype is designed with DSP-TMS320F28335. Whole control system has been designed including initial rotor position determination, magnetic polarity judgment and rotor position and speed estimation by the proposed HFI scheme in low-speed region. Experiments show that the proposed schemes are of good dynamic performance and no additional audible noise is added, its bandwidth of current loop being 500Hz, which approach to that of vector control system of PMSM with encoder.

Copyright

© 2019, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Jinbo Liu
AU  - Jinlei Chen
AU  - Fanghong Gao
PY  - 2019/08
DA  - 2019/08
TI  - A Sensorless Vector Control Scheme with High Bandwidth Current Loop for Surface Mounted Permanent Magnet Synchronous Machine Based on High Frequency Square Wave Type Voltage Injection
BT  - Proceedings of the 2019 International Conference on Modeling, Simulation and Big Data Analysis (MSBDA 2019)
PB  - Atlantis Press
SP  - 402
EP  - 412
SN  - 2352-538X
UR  - https://doi.org/10.2991/msbda-19.2019.64
DO  - 10.2991/msbda-19.2019.64
ID  - Liu2019/08
ER  -