Development of a Speed-control System of Brushless DC Motor Based on A3936SED

In this paper,a speed control system for BLDC motors based on the A3936SED and AT89C52 was developed.A3936SED is a new generation of ASIC of Allegro designed for PWM control of BLDC motors.An 8-bit single chip AT89C52 is used to control the speed of BLDC motors.By the combination of the motors control ASIC and general processor,the comples control strategies can be easily realized with the flexible use of software.The system has the features of high integrity and feasibility.