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| DTC System Based on Hybrid Flux Linkage Model and Discrete Space Vector Modulation |
| Zhang Xing, Wei Dongdong, Yang Shuying, Xie Zhen |
| Hefei University of Technology Hefei 230009 China |
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Abstract In direct torque control (DTC) schemes for induction machine, a hybrid stator flux linkage model is presented to solve the transition between voltage-current-based model and current-speed- based model, so the accuracy of flux estimation is improved. Meanwhile, the number of available voltage vectors is limited and its duration time is unreasonable in conventional direct torque control scheme, so more effective voltage vectors, which are based on improved switching table, can be obtained by using discrete space vector modulation technique. The comparative simulation results show the reduction of torque ripple comparing with conventional scheme. Finally, some experiments are carried out to confirm the effectiveness of the presented method.
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Received: 14 August 2007
Published: 04 March 2014
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2010, Vol. 25 
