Title of article :
A NEW HYBRID BRUSHLESS DC MOTOR/GENERATOR WITHOUT PERMANENT MAGNET
Author/Authors :
Afjei, E. shahid beheshti university - DepartTnent of Electrical and Computer Engineering, تهران, ايران , Hashemipour, O. shahid beheshti university - DepartTnent of Electrical and Computer Engineering, تهران, ايران , Saali, M.A shahid beheshti university - DepartTnent of Electrical and Computer Engineering, تهران, ايران , Nezamabadi, M.M. shahid beheshti university - DepartTnent of Electrical and Computer Engineering, تهران, ايران
Abstract :
The Brushless DC (BLDC) motor is a simple robust machine which has found application over a wide power and speed of ranges in different shapes and geometry. This paper briefly reviews the fundamentals behind the motor and also the different types of BLDC motors \vith different geometries and then presents a new configuration for BLDC motor/generator, which does not use a permanent magnet in the rotor. The proposed novel nlotor/generator consists of t\\ O nlagnetically dependent stator and rotor sets (layers), \vhere each stator set includes nine salient poles with windings \vrapped around them \vhile, the rotor comprises of six salient poles. The magnetic field passes through a guide to the rotor then the stator and finally completes its path via the motor housing. This is a three phase nl0tor/generator and every stator and rotor pole arcs are about 30°, A ne\v po\ver electronic converter is also presented. This topology provides bidirectional control of the current for each motor phase independently. This control scheme permits the motor to operate with any nUlnber of phases at any tinle. In this converter, four po\ver s\vitches in the form of a bridge connection for each motor phase has been utilized therefore, the motor can operate by s\vitching different sequences for the current direction in each motor phase \vindings and also otlers the choice. of having any number of phases to be on at any time. A proto-type nlotor/generator and the drive circuit have been built and tested in the laboratory and the nunlerical and experimental results are presented. Due to the ruggedness of the proposed motor/generator in comparison \vith the conventional and brushless dc motors used for automobile applications, this unit looks very promising for use as an integrated motor generator for hybrid vehicle.
Keywords :
Brushless DC Motor , Generator , DC Motor , Generator , DC Motor Drive , Hybrid Brushless DC Motor
Journal title :
International Journal of Engineering
Journal title :
International Journal of Engineering