Position-sensorless control for the brushless DC motor based on an sliding mode observer

2005 ◽  
Author(s):  
Xiaojun Yang ◽  
Zuohua Tian ◽  
Songjiao Shi
Keyword(s):  
Sliding Mode ◽  
Sensorless Control ◽  
Dc Motor ◽  
Sliding Mode Observer ◽  
Brushless Dc Motor ◽  
Brushless Dc ◽  
Position Sensorless

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.

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