基于高精度电感法的无刷直流电机起动及反电动势同步检测稳定性研究

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Abstract A high accuracy positioning scheme based on the inductance method is proposed. The positioning accuracy is raised to 30 degrees from 60 degrees without increasing the number of positioning current pulses and it also eliminates the influence on testing caused by no consistent phase winding parameter because of the problem of motor technology. A novel switching algorithm is designed, which can be used to switch the motor to closed loop in a relatively short time reliably. A synchronous detect scheme of counter electromotive force is also discussed in this paper. We compare the difference between detecting counter electromotive force cross-zero signal at PWM-ON and at PWM-OFF by analysis, simulation and experiment, after that, we propose the compensation scheme for the interference factors. The stability and reliability of the proposed scheme are verified by the prototype test.

Key words： Brushless DC motor sensorless control high precision inductance method synchronous detection

Received: 10 October 2015 Published: 22 March 2017

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TM33

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	Gong Jian
	Liao Liqing
	Ye Bingqing

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Gong Jian,Liao Liqing,Ye Bingqing. Brushless DC Motor Starting Based on High Precision Inductance Method and Study on the Stability of BEMF Synchronous Detection[J]. Transactions of China Electrotechnical Society, 2017, 32(5): 105-112.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I5/105

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