基于全局快速终端滑模观测器的无刷直流电机无位置传感器控制

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Abstract The position sensor of brushless DC motor (BLDCM) control system affects its reliability, volume and cost, so position sensorless control method is often adopted. To improve the control performance of sliding mode observer control system, the global fast terminal sliding mode control (GFTSMO) strategy is proposed. The control strategy combined the advantages of nonsingular terminal sliding mode observer (NTSMO) and linear sliding mode observer. The hybrid sliding mode surface is introduced. Global fast convergence and good tracking precision can be achieved. Phase lag problem of conventional sliding mode observer is reduced, the estimation accuracy of rotor position and speed is improved. The high-order sliding mode control law is designed to guarantee the stability of the observer and suppress the chattering phenomenon. The smooth back EMF signal can be obtained. The experimental results showed that the proposed control strategy can accurately estimate the line back EMF of BLDCM and improve the convergence rate, it can improve the static and dynamic characteristics of system. The experimental results verified the effectiveness of the proposed method.

Key words： Brushless DC motor(BLDCM) sensorless control global fast terminal sliding mode observer(GFTSMO)

Received: 24 February 2016 Published: 20 June 2017

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TM351

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	Wang Xiaoyuan
	Fu Tao

Cite this article:

Wang Xiaoyuan,Fu Tao. Position Sensorless Control of BLDC Motor Based on Global Fast Terminal Sliding Mode Observer[J]. Transactions of China Electrotechnical Society, 2017, 32(11): 164-172.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I11/164

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