Abstract
A state of art design and stability analysis of high power density and high efficiency Permanent Magnet Brushless DC (PMBLDC) Motor drive suitable for light electric vehicle application is presented in this paper. The motor used is poly-phase, multi-pole, rectangular wave Permanent Magnet motor with outer rotor configuration. The spokes of the wheel is directly fitted in to the outer rotor of this proposed motor. In comparison to the conventional PMBLDC motor this motor has special features namely, reduction in volume and weight, saving in copper and elimination of cogging torque. The motor operates at high starting torque and high cruising speed. Hence the proposed PMBLDC drive will have high power density, high efficiency and fast dynamic performance which will be best suited for gearless electric vehicle application. The design and stability analysis are carried out on 3-phase, 8pole PMBLDC motor drive. Simulation results are obtained with Matlab. The objective of the light electric vehicle is to provide high efficiency controllability and safety with wide speed range. The simulation results show that the developed PMBLDC motor model with modular approach and enhanced efficiency is best suited for light electric vehicles.
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