An investigation on the performance of permanent magnet brushless DC motor based on different materials

Abstract

The main concern of all the developing countries today is the reduction of pollutant gases and conservation of energy. The pollutant gases from vehicles contribute more towards global warming. This has made the countries design and develop pollutant-free initiatives such as Electric Vehicles (EVs). The EV consists of electric motors, batteries, energy management system in addition to a vehicle body. For EV applications, Permanent Magnet Brushless DC (PMBLDC) motors are more suitable because of their high-power density and reliability. Most of the EVs are with Permanent Magnet Brushless DC motors with the traditional driveline. Hence a comprehensive study on the performance of Permanent Magnet Brushless DC motor drive has been made with varied magnet materials for the required power and torque. The design variables chosen for this design are airgap flux density, magnet angle, magnet thickness, slot/pole fraction, etc., The main issue related to BLDC motor design is the cogging torque. This work elaborates the investigation on the performance of PMBLDC motor based on the material selection, flux patterns, etc.,.to reduce the cogging torque of the motor. This is done using MotorSolve software and the motor chosen here consists of 24V, 3 phase, 4 pole/8 pole, and 27 slots/24 slots BLDC motor.