DSP-Based Fully Digital High Speed Control of AC Induction Motors

• Main Authors: Chang-Yu Ho, 何昌祐
• Other Authors: Ying-Yu Tzou
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/55358350141000679073

碩士 === 國立交通大學 === 控制工程系 === 82 === This thesis presents the design and implementation of a fully digital-controlled ac induction servo drive by using a digital signal processor (DSP). A high speed control method is proposed to operate an ac induction motor up to triple its base speed with high performance of transient and steady-state responses. An indirect field-oriented vector control scheme with software current feedback loop is employed to perform the fast response current decoupling control of an induction motor. With an appropriate servo compensator design, the induction motor drive can achieve the desirable servo performance. Moreover, a field- weakening technique is adopted to expand the speed control range under the limited inverter ceiling voltage. In order to verify the proposed control scheme, a DSP-based digital controller and an intelligent power module (IPM) based voltage source inverter are implemented to construct the fully digital controlled ac induction servo system and minimize the hardware peripherals. DSP executes a PWM signal generation, current control, vector control and speed/position control processing. In application to a 300W induction motor drive system, experimental results show that the DSP-based fully digitized servo drive can achieve the high speed control requirement.