| Summary: | 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.
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