| Summary: | 碩士 === 國立勤益科技大學 === 電機工程系 === 98 === In this thesis the sensorless permanent magnet synchronous motor drive by using high frequency signal injection is presented. Today, reducing carbon emission and energy is the goal for world development. Permanent magnet synchronous motor（PMSM）compare with other type motors has the merits for low noise, high power density, high efficiency, and less maintenance, which has been widely used in industry and household appliances. Furthermore, the high power semiconductor devices is continued development, the exploitation of micro processing technology which has ability to operate high speed, and the research for intelligent control skill, the PMSM drives are used in high performance application. In this research, the high frequency voltage signal is injected to the permanent magnet synchronous motor, and the resultant injected frequency current signal is used to estimate the rotor position. Then, the PMSM drive system based on decoupling rotor field oriented controlled is established, which used the estimated rotor position of the motor. The simulated programs are realized by MATLAB/Simulink to confirm the proposed approach.
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