DSP based Control of BRUSHLESS DC Motor Drive

This paper refers to the design of a motor control system required for a brushless DC motor control application. The paper work includes the design and development of the necessary hardware supported by appropriate embedded software. The BLDC motor has certain advantages over other motors such as maximum torque to weight ratio, high speed etc, but it requires an electronic commutator such as a convertor with MOSFETs/IGBTs. The MOSFETs/IGBTs need to be turned ON and OFF, in a particular sequence. This switching is controlled by a microprocessor or DSC (Digital signal controller). The dsPIC is used to control the speed of a BLDC motor drive. The main objective is to achieve speed control of brushless dc motor drive for industrial applications. The flexibility of the drive is increased by using the digital controller. The three phase inverter for feeding BLDC motor has been designed using MOSFET. The control algorithms are implemented using dsPIC control board, which enables single chip, cost effective, modular and increased performance solutions for BLDC drives. The C program with MPLAB IDE software is used to program the dsPIC which generates the PWM signals. The PWM signals of all the switches are observed using CRO and the control logic is verified. IndexTerms—BLDC motor,dsPIC,MPLABIDE