| Summary: | 碩士 === 南台科技大學 === 電機工程系 === 100 === Permanent magnet synchronous motors (PMSMs) have advantages of small rotor mass, the structure of easy miniaturization and design, and high efficiency. In order to run the motor smooth, it is necessary to get the speed and position information from the position sensors, usually an optical encoder external mounted on the motor. The high cost of optical encoders often accounts for more than one-third of the overall price. Coupling with the optical encoder needs additional space and overall volume. Sensorless control copes with motor position and speed control without using the optical encoder.
In this thesis, the sensorless control for PMSM drive design gets the rotor position by ADCS to read the two phase current sensors. However, the small phase currents feedback may lead to the error of angle estimation. This thesis will use the merits of fuzzy control for angle compensation to increase the stability of the system. The experimental results of the speed controller using the PI control and fuzzy control will be compared and verified.
Finally, this PMSM drive based on DSP TMS320LF2812, which includes space vector pulse-width modulation for current control and built-in analog-to-digital converters (ADCs) to sense currents, is adopted in the experiment to achieve the sensorless speed control.
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