| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 98 === This thesis presents the design and control of three-phase permanent-magnet synchronous motors (PMSM). The 10-pole structure with approximate skews is installed by inset permanent-magnet, while the 12-slot is non-overlapping three-phase windings in the stator. The Maxwell_2D is used to analyze characteristics of flux linkage and no-load induced voltage of the designed motor. The geometric dimensions of the designed motor and the material of the permanent-magnet are determined. For rotor speed below 4,200rpm, the simulation results of the peak induced voltage and harmonic distortion are 105.3V and 0.77%, respectively, whereas the peak induced voltage and harmonic distortion measured are 104V and 1.29%, correspondingly.
In the control of the designed motor, the Hall-effect sensors are applied for rotor position feedback when the motor starts, while the encoder is used to measure the rotor position when the motor runs in the steady-state. The digital signal processor TMS320F2808 serves as the control core and is used with the control strategy of speed and current as well as the inverter to increase the efficiency of the designed motor and performance of the speed. A prototype of 4,200rpm and 255W for PMSM drives is built for evaluation. Experimental results verify the proposed design and performance.
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