Speed sensorless control of induction motor using sliding mode observer with variable boundary layer

2008 ◽  
Author(s):  
Min Yeong Jang ◽  
Bong Su Jang ◽  
Jun Ik Jeong ◽  
Yong Hun Park ◽  
Young Ahn Kwon
Keyword(s):  
Boundary Layer ◽  
Induction Motor ◽  
Sliding Mode ◽  
Sensorless Control ◽  
Sliding Mode Observer ◽  
Speed Sensorless ◽  
Variable Boundary

Sensorless Control for PMLSM Based on Fuzzy Sliding Mode Observer

2014 ◽  
Vol 556-562 ◽  
pp. 2270-2273
Author(s):  
Hua Cai Lu ◽  
Juan Ti ◽  
Yi Ming Yuan ◽  
Li Sheng Wei
Keyword(s):  
Boundary Layer ◽  
Control Method ◽  
Fuzzy Controller ◽  
Sliding Mode ◽  
Sensorless Control ◽  
Sliding Mode Observer ◽  
Mode Function ◽  
Fuzzy Sliding Mode ◽  
The Difference ◽  
Current Error

In this paper, a new sensorless control method is proposed for a permanent magnet linear synchronous motor based on Fuzzy sliding mode observer, which combines the advantages of sliding mode observer and Fuzzy controller respectively. The difference between the current estimated value and the actual current value is regarded as sliding mode function; sliding mode function (current error) and variation of the error are used as the input of fuzzy controller, and the width of the boundary layer as the output, adjusting the width of the boundary layer dynamically in real time. The simulation results show that Fuzzy sliding mode observer is able to find a balance between soft chattering and steady-state error, keep the system robustness and control precision.

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