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Design, Development, FEM analysis of Hybrid 12/14 BSRM with advanced controllers for Saispandan- I

Abstract 12/14 Bearingless switched reluctance motor would be ideal according to our study for the Indian Total Artificial Heart- Saispandhan. Bearingless switched reluctance motor (BSRM) realizes both levitation and rotation by integrating both magnetic levitation and torque windings on the stator of the motor. It has a suspended rotor and decoupled control characteristics between speed and suspension force. The rotor has 14 poles and stator carries 12 poles. In 12 poles of the stator coordinately placed 4 poles are used for the suspension winding and diagonally placed 8 poles are used for the main winding motor. The rotor doesn’t carry any winding. The bearingless concept is a plausible alternative to the magnetic bearing drives because as it provides numerous advantages like of friction-free, negligible thermal problems, lubrication free, less size ,minimal maintenance, low cost, compactness and no requirement of high power amplifiers. Levitation control of the rotor during starting, acceleration and deceleration of the rotor during rotation are the key phases besides stable levitation, in high-speed rotation of bearingless switched reluctance motor (BSRM).To realize the full potential of BSRM; it becomes necessary to overcome a few disadvantages associated with it. The BSRM requires a complex controller on account of its non-linear characteristics. Accurate shaft position information is essential to obtain high performance from the drive. To get smooth and acoustic noise less operation, the BSRM requires a good Torque ripple reduction control techniques.

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