Stability Analysis and Robust Adaptive Control of Induction Motor

• Main Authors: Rea Jing Chung, 鍾瑞鉅
• Other Authors: Nai Jian Wang
• Format: Others
• Language: en_US
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/32985246312689783739

碩士 === 國立臺灣科技大學 === 電機工程系 === 87 === Model Reference Adaptive Controllers (MRAC) have high performance and are insensitive to system uncertainty,however,suitable adaptive gain must be selected. Otherwise, it may cause the states to diverge. In this paper, we propose a modified MRAC as a speed controller for an induction motor and analyze the stability. First, we design the MRAC for the motor, then we perform the stability analysis. From the latter, a criterion to achieve both stability and high performance is found. From this criterion, a more robust version of the MRAC is derived which ensures safe motor operation despite possible operator error. We also propose an adaptive fuzzy controller. With the abilities of self-adjust and self-learning, the proposed fuzzy controller can tolerate a large range of model uncertainty.The proposed algorithm is tested by computer simulation and experiment to verify the results and demonstrate its effectiveness. The method can be easily implemented.