DESIGNING OF PROTOTYPE SLOTLESS PERMANENT MAGNET BLDC MOTOR WITH HALBACH ARRAY USING ANSYS SOFTWARE AND ITS INVESTIGATION

Abstract

This paper presents the developments in the design of Slot less PM brushless DC Motor for higher torque and less cogging effect. The slotless design provides minimum cogging torque, less weight whereas the Halbach array with its extraordinary positions of permanent magnets keeps the magnetic field on any one side of the array and there is no stray field produced. The Matlab coding has been developed for the machine specifications 250Watts, 24Volts, 10.5Amps, 3000Rpm, & 0.67Nm and the output is simulated. The performance characteristics of this special electrical machine are analyzed and verified using Ansys software. Initially, the cad design model of this machine is developed. With the help of the CAD model, the real-time prototype model is developed and then, all the design parameters are validated. The foremost magnitude, back emf is validated perfectly as 0.48volts for 78.12Rpm and 0.4volts for 62.5Rpm using the scope from the prototype model. Finally, the entire design parameters are validated using Ansys, Matlab, CAD in a Prototype model. To avoid risks of failure while developing the motor, a smaller scale of the motor is developed to demonstrate the success of the design including physical dimensions, winding techniques, and Halbach array assembly. The same technique can be used to design higher rating motors.