Development of DSP-Based Speed Control System for Brushless DC Motors

• Main Author: 劉正彬
• Other Authors: 葉勝年
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/28960197616640435672

碩士 === 國立臺灣科技大學 === 電機工程系 === 90 === This thesis presents the analysis and implementation of a wide-speed control system for brushless dc motors. A digital signal processor (DSP TMS320F240) is used to complete the whole digital control system to reduce hardware complexity and increase the speed response. A Hall-effect sensor is also used to detect rotor position and estimate rotor speed. In addition, speed and current feedback are invoked to realize the proposed high performance system. Specifically, a current feedback technique which is conducted by peak phase current control algorithm is implemented to control output current. This will not only reduce control complexity in three-phase system, but also promote linearity of the proposed control system. Finally, a current regulator is also introduced to adjust current command automatically through the error between command current and armature current of motor to reduce output current ripple. A 200W brushless dc motor is built and experiments are given to justify the analysis.