Journal of international Conference on Electrical Machines and Systems

Journal of International Conference on Electrical Machines and Systems (대한전기학회 분과)
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A Sensorless Switched Reluctance Drive System Based on the Improved Simplified Flux Method

  • Li, Zhenguo (Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province, Yanshan University) ;
  • Song, Andong (Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province, Yanshan University) ;
  • Ahn, Jin-Woo (Department of Mechatronics Engineering, Kyungsung University)
  • Received : 2012.10.05
  • Accepted : 2012.11.19
  • Published : 2012.12.01
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Abstract

This paper describes a new rotor position sensorless control method for SRM drives based on an improved simplified flux linkage method. In the traditional simplified flux linkage method, every phases take turns conduction and current chopping control method is used. Every phases take turns conduction means turning on the incoming working phase while turning off the working phase. This conduction mode causes coupling between turn-on and turn-off angles, which goes against optimal efficiency or torque ripple minimization with sensorless speed control. In the improved simplified flux linkage method, turn-off angle is calculated by flux loop, the turn-on angle can be given arbitrarily and has no relations with the turn-off angle, and the current chopping control method is used. The speed and rotor position can be estimated then. Finally, a sensorless SRM speed control system and an experiment platform with DSP are built and validity of this method is confirmed.

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References

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