基于电流过采样的永磁同步电机电压脉冲注入无位置传感器控制

doi:10.19595/j.cnki.1000-6753.tces.180417

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Abstract

Aiming at the problem of poor dynamic and low steady-state accuracy of sensorless control for permanent magnet synchronous machine (PMSM) in low speed range, a voltage pulse injection on αβ axis based position estimation strategy is proposed. During 4 consecutive pulse width modulation (PWM) periods, 4 symmetrically voltage pulses are injected, and phase currents are sampled by current oversampling method. What is more, a compensation method is adopted to reduce the nonlinear impacts of the inverter. The proposed method is compared with the modified position estimation based on voltage pulses injection on estimated d axis by experiments. The results have verified the proposed two strategies. The position estimation shows high accuracy and excellent dynamic performance under the conditions such as rated load startup, rated load step and speed reference step, and so on. Moreover, the proposed strategies only need several additions or subtractions to obtain position information, which releases computation burden and is easy to implement.

Key words： Permanent magnet synchronous machine (PMSM) sensorless control voltage pulse injection current oversampling

Received: 27 March 2018 Published: 29 December 2018

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TM351

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	Articles by authors
	Wu Chun
	Dong Shifan
	Zhong Degang
	Chen Qiang
	Wen Long

Cite this article:

Wu Chun,Dong Shifan,Zhong Degang等. Voltage Pulse Injection Based Sensorless Control for Permanent Magnet Synchronous Machine with Current Oversampling Method[J]. Transactions of China Electrotechnical Society, 2018, 33(24): 5678-5687.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180417 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I24/5678

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