Electromagnetic Design and Simulation of High Efficiency Switched Reluctance Motors

Abstract

Presently the world is surrounded by various devices which convert one form of energy into others form. One of them is electrical energy that is converted into mechanical energy. Electrical energy is easily transmitted from generation end to user end with the help of high efficiency transmission system and varies the range of energy with the help of transformers. Electrical device which converts the electrical energy into mechanical energy is called electrical motor. Various types of motors, such as DC Motors, Induction Motors, Synchronous Motors, Stepper Motor and Reluctance Motors. newlineApplications due to the simple and robust structure, among the various types of motor one of the most popular motor which is use commonly known as SRM . Features of SR Motor which make this more attractive among the all type of motors are high torque density, efficiency, and reliability, coupled with their fault tolerant structure, low manufacturing cost and simple physics. The main parts of the motor are stator, rotor and stator windings. It has simple concentrated stator windings on the stator pole which are excited individually by dc supply and rotor has no windings or magnet, it is also called doubly salient pole motor. newlineThis type of motor works on the principle of variable reluctance between stator and rotor. Variation in reluctance values between stator and rotor is mainly responsible for rotor rotation. Apart from many advantages, the SR motors are not widely used in various applications because of many inherent disadvantages such as large torque ripple, vibration and acoustic noise. Numbers of research scholars are trying at their level to make SR Motor to meet expectation of Industrial application. newlineIn the presented research, efforts had been made to improve the overall performance of SR motor by modifying the stator pole geometry by introducing air gap in pole which is known as teethed stator pole. When air gap is introduced in stator pole, the magnetic circuit parameters of system will changed. Change in air gap in stator