| Summary: | 碩士 === 中原大學 === 電機工程研究所 === 89 ===
The subject of this thesis is to design a sensorless speed control system using ML4425 for a permanent-magnet synchronous motor (PMSM) drive. Owing to the advancement of magnet material, power semiconductor components and control theories in recent years, the PMSM has been widely used in many industrial applications for low and medium power. Because of the limitation and drawback of the PMSM equipped with position sensor, the research of sensorless control schemes for PMSM becomes very important. Therefore, a sensorless speed control system for a PMSM drive using ML4425 is proposed in this thesis. The proposed motor drive system can make the PMSM accelerate from standstill to the set speed smoothly. In the application of ML4425, only limited knowledge of electrical and mechanical parameters is needed to control the speed of the PMSM properly. Finally, the effectiveness of the proposed design scheme is verified by some experimental results.
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