The design of a Inverter and DSP controller for the driving of BLDC motor used in Small Electrical Vehicle -Kim, Jae Woo Dept. of Electronic Engineering Graduate School of Changwon National University

The design of a Inverter and DSP controller for the driving of BLDC motor used in Small Electrical Vehicle
 Kim, Jae Woo 
Dept. of Electronic Engineering Graduate School of Changwon National University 

ABSTRACT
 This paper mainly handles about the designing of the inverter and the controller to drive the BLDC motor for the small electric vehicle. The speed control part of driving system is designed to select the usage of 32 bits DSP(TMS320F2808) specialized for a servo motor control and 16 bits Microchip’s micro-processer(dsPIC30F2010) optionally. The inverter driving part is designed with the MOSFET(IRFB3077) which is capable of high speed switching and better for low voltage batteries switching. Instead of using complicated PWM(Pulse width Modulation) method, we used simple 3 phase, 2 excitation PWM method having 6 step excitation sequence and voltage controlled PWM method to reduce the load of a software. The digital control algorithm for the speed control is simplified to control the speed by controlling voltage right away not performing current control. Through the result obtained from the driving of the BLDC motor by using the suggested hardware controller and algorithm for speed and PWM, we proved the usefulness of the hardware controller and control algorithm. KEYWORDS BLDC motor, electric vehicle, inverter, micro-processer, MOSFET, PWM, control algorithm.