一种改进的永磁同步电机低速无位置传感器控制策略

doi:10.19595/j.cnki.1000-6753.tces.170195

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Abstract An improved low speed sensorless control strategy for permanent magnet synchronous motor (PMSM) is proposed. Differing from conventional methods,such as the injection of a rotating carrier voltage into a stationary reference frame and the injection of a pulsating carrier voltage into an estimated synchronous reference frame,the proposed method injects a pulsating high-frequency carrier voltage into a stationary reference frame,and the rotor position information can be retrieved from the carrier current response. This paper gives a description for the selection of signal injection and the design of filter frequency, and the use of a two-phase-type-locked loop(TP-PLL) is similar to the simplified extended kalman filter to get the position of the final estimate value. The effectiveness of the method is verified by experiments. The results show that the proposed method can obtain the rotor position information quickly and accurately, and has good stability and dynamic characteristics.

Key words： Permanent magnet synchronous motor (PMSM) sensorless control low speed performance two-phase-type-locked loop (TP-PLL)

Received: 27 February 2017 Published: 08 May 2018

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TM351

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	Li Mengqiu
	Wang Long

Cite this article:

Li Mengqiu,Wang Long. An Improved Low Speed Sensorless Control Strategy for Permanent Magnet Synchronous Motor[J]. Transactions of China Electrotechnical Society, 2018, 33(9): 1967-1974.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.170195 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I9/1967

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