Rotor position estimation with full-order sliding- mode observer for sensorless IPMSM

2012 ◽  
Author(s):  
Wang Gaolin ◽  
Zhang Guoqiang ◽  
Xu Dianguo
Keyword(s):  
Sliding Mode ◽  
Position Estimation ◽  
Sliding Mode Observer ◽  
Rotor Position ◽  
Rotor Position Estimation

Position Sensorless Control of Brushless DC Motor

2014 ◽  
Vol 915-916 ◽  
pp. 418-421
Author(s):  
Jin Xiang Fang
Keyword(s):  
Sliding Mode ◽  
Sensorless Control ◽  
Dc Motor ◽  
Position Estimation ◽  
Sliding Mode Observer ◽  
Brushless Dc Motor ◽  
The Novel ◽  
Rotor Position ◽  
Brushless Dc ◽  
Rotor Position Estimation

According to the chattering problem in the traditional sliding mode observer of the position sensorless control of brushless DC motor, a novel quasi sliding mode observer for rotor position estimation was proposed, which took the error between the actual and estimated currents as sliding surface and tracked the actual rotor position according to the mathematical relationship of back EMF and speed of the motor. Then the sensorless control system of the brushless DC motor based on the novel sliding mode observer was designed. Simulation results showed that the novel sliding mode control method could improve the rotor position estimation accuracy and effectively suppress the chattering problem to enhance the robustness of system.

scholarly journals Full-Speed Range Encoderless Control for Salient-Pole PMSM with a Novel Full-Order SMO

Energies ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 2423 ◽  
Author(s):  
Yuanlin Wang ◽  
Xiaocan Wang ◽  
Wei Xie ◽  
Manfeng Dou
Keyword(s):  
Sliding Mode ◽  
Permanent Magnet Synchronous Motor ◽  
Position Estimation ◽  
Low Speed ◽  
Rotor Position ◽  
Stator Current ◽  
Salient Pole ◽  
Start Up ◽  
Full Speed ◽  
Rotor Position Estimation

For salient-pole permanent magnet synchronous motor (PMSM), the amplitude of extended back electromotive force (EEMF) is determined by rotor speed, stator current and its derivative value. Theoretically, even at extremely low speed, the back EEMF can be detected if the current in q-axis is changing. However, it is difficult to detect the EEMF precisely due to the current at low speed. In this paper, novel full-order multi-input and multi-output discrete-time sliding mode observer (SMO) is built to detect the rotor position. With the proposed rotor position estimation technique, the motor can start up from standstill and reverse between positive and negative directions without a position sensor. The proposed method was evaluated by experiment.

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