A Switching Flux-linkage Reference-based Sensorless Method for Switched Reluctance Motor Drives |
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| Authors: | Jun Cai Zhiquan Deng |
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| Affiliation: | 1. Automatic Control and System Engineering , The University of Sheffield , Sheffield , UK;2. College of Automation Engineering , Nanjing University of Aeronautics and Astronautics , Nanjing , China |
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| Abstract: | A switching flux reference estimation based method for sensorless control of switched reluctance motors is proposed in this article. The basic idea of the method is to estimate switching-on and switching-off flux linkage references from the giving switching angles range and measured phase current. Real-time comparing the estimated flux linkage with estimated switching flux references, the driving signals can be obtained for sensorless control and rotor speed estimation. For closed-loop control, switching-off angle is fixed for speed estimation, and switching-on angle is regulated by the speed deviation proportional-integrator controller. The process to estimate the switching flux references is greatly simplified compared with conventional flux/current methods; it is easily implemented and is suitable for low-cost industry applications. To verify the proposed method, experiments were conducted on a 1-kW, 3-phase 12/8 switched reluctance motor. Experimental results show that speed variable performance of the sensorless drive is comparable with that of position sensors. |
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| Keywords: | switched reluctance motor sensorless control flux-current switching flux reference |
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