基于高频脉冲注入的无轴承开关磁阻电机转子位置与径向位移检测方法

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Abstract In conventional bearingless switched reluctance motors (BSRMs), some transducers should be installed to detect the rotor angle position and the shaft radial displacements to implement the rotation and magnetic levitation simultaneously. In order to improve the integration and reliability of BSRMs, the self-sensing method of the rotor angle position and radial displacements is investigated in this paper. The rotor angle position and radial displacements of BSRMs are estimated simultaneously through injecting a series of high-frequency voltage pulses into main windings of inactive phases. According to the relationship between the induced-current slope and the inductance, the real-time distribution of inductances could be obtained. As a result, the real-time angle position of BSRMs can be estimated. Meanwhile, mutual inductances can be obtained by detecting the induced electromotive force of levitation windings. Therefore, the radial displacements can also be calculated according to the relationship between the mutual inductances and radial displacements. Therefore, the proposed method can estimate the rotor angle position and radial displacements at the same time only by injecting one series of high-frequency voltage pulses into main windings. Experimental results verify the effectiveness of the proposed method.

Key words： Bearingless switched reluctance motor angle position detection radial displacement detection pulse injection method

Received: 11 August 2015 Published: 27 February 2017

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TM352

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	Cao Xin
	Sun Qin
	Zhao He
	Deng Zhiquan

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Cao Xin,Sun Qin,Zhao He等. Detecting Method of Rotor Angle Position and Radial Displacement for Bearingless Switched Reluctance Motors with the High-Frequency Pulse Injection[J]. Transactions of China Electrotechnical Society, 2017, 32(3): 113-119.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I3/113

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