A Simplified Design and Control of Switched Reluctance Motor

International Journal of Research and Scientific Innovation (IJRSI) | Volume V, Issue V, May 2018 | ISSN 2321–2705

A Simplified Design and Control of Switched Reluctance Motor

G. Ravi Kiran¹, Mujtaba Siddiqui²

¹Assistant Professor, Electrical Engineering Department, Muffakham Jah College of Engineering and Technology, Banjara Hills, Hyderabad, Telangana, India
²Student, Electrical Engineering Department, Muffakham Jah College of Engineering and Technology, Banjara Hills, Hyderabad, Telangana, India

Abstract — The simplified sensor and sensor less control of Switched Reluctance Motor (SRM) drive is done here. The proposed sensor less excitation position is based on the amplified detecting phase current by the short dc pulse voltage according to the rotor position during detecting period. In the proposed sensor less scheme, a phase winding has excitation, detecting and non-excitation period respectively. The turn-on and turn-off positions of SRM are determined by the detecting period of the previous excited and next exciting windings with detecting phase current levels that are inverse-proportional to rotor position. During the detecting period of a phase, the different phases turn-on and turn-off position are determined by the envelope of detected current level. After then detecting period is ended. In order to get the linear relationship of rotor position and detected phase current, a short test voltage is applied during detecting period. Since the proposed sensor less scheme does not use the complex inductance calculation and any look-up table of flux and position, the excitation pattern for SRM can be easily determined.

This paper presents a simplified approach of sensor less control of SRM without a complex calculation of rotor position from estimated inductance. Since the output torque is dependent on excitation position and excited current, the proposed sensor less scheme determines the only excitation pattern from the detected current of unexcited phase winding in the detecting period.

Index Terms — SRM, rotor position, inductance calculation, MATLAB/ SIMULINK

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