考虑交叉饱和效应的变角度方波电压注入永磁同步电机无位置传感器控制

doi:10.19595/j.cnki.1000-6753.tces.191239

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Abstract The conventional estimation method of d-axis square-wave voltage injection can be affected by magnetic field cross-saturation,which causes rotor position estimation error.Therefore,a variable angle square-wave voltage injection for sensorless control of permanent magnet synchronous machine (PMSM) is proposed considering the compensation of cross-saturation effect.The injection voltage synchronous rotation coordinate fg is introduced and a pair of square-wave voltages is injected on the f-axis.The angle between the f-axis and the estimated d-axis is defined as the injection angle,which changes with different magnetic field cross-saturation effects.The g-axis differential current is calculated for position estimation.Due to the change of the injection angle,the g-axis differential current will no longer contain cross-saturation related information,and accurate position estimation can be realized.Finally,the proposed variable angle square-wave injection method is compared with the conventional estimated d-axis square-wave voltage injection method by experiments.The experimental results show that under different load torques and different speeds,the proposed method has high accurate rotor position estimation and fast dynamic-state performance,and is easy to implement.

Key words： Permanent magnet synchronous machine square-wave voltage injection magnetic field cross-saturation effect sensorless control

Received: 25 September 2019

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TM351

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	Wu Chun
	Chen Ke
	Nan Yurong
	Wei Chun
	Zeng Zhicheng

Cite this article:

Wu Chun,Chen Ke,Nan Yurong等. Variable Angle Square-Wave Voltage Injection for Sensorless Control of PMSM Considering Cross-Saturation Effect[J]. Transactions of China Electrotechnical Society, 2020, 35(22): 4678-4687.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.191239 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I22/4678

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