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| A Decoupling Current Control Scheme for Induction Machine Controllers |
| Qi Liying, Wang Chenchen, Zhou Minglei, Wang Jian |
| Beijing Jiaotong University Beijing 100044 China |
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Abstract Current controller plays an important role in achieving rapid and accurate torque or speed control of vector-controlled induction motors. However, cross-coupling caused by the reference frame transformation, which increases with the synchronous frequency, impairs the characteristics of torque response. Meanwhile, the signal delay increases undesired cross coupling, which may have a significant impact on high power and low switching AC drive system, and may even lead to system instability. In order to achieve good decoupling performance, more accurate and complete induction motor model based on complex vector is established, and a decoupling current control scheme is proposed. The time-delay and corresponding compensation strategy are also studied in this paper. Based on complex vector frequency-response functions, the dynamic decoupling performance and the robust of the scheme are analyzed. Experimental results show the method proposed can effectively improve the dynamic performance of induction motors.
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Received: 06 April 2012
Published: 05 November 2014
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2014, Vol. 29 
