Design of an Accurate Speed Control System for Brushless DC Motor

Abstract

The brushless DC motor is widely used in industry. In this paper, we present a low cost, high accuracy control scheme based on the structure characteristics of a brushless DC motor for speed control. The main features of the control system are as follows: • Optimized motor efficiency • Control of the spindle motor speed by a micro-controller • Accuracy achieved on the operating speed at 3600 rpm is ±0.03%