| Summary: | 碩士 === 國立臺北科技大學 === 電機工程系 === 106 === The object of the thesis is to design and implement a DC/AC inverter using micro-controller for single phase power system. In this thesis, the prototype full bridge single phase inverter, and the associated unipolar voltage switching method are used. In addi-tion, an active damping control loop is added in which the capacitor current and virtual resistance are used to increase system damping and reduce the output voltage oscillation at light load. In this thesis, the output LC filter, the capacitor current feedback circuit, feed forward loop and the voltage control loop are designed for the required proportional-intregral controller to provide output voltage regulation and improve system dynamic response.
The design specifications in the implemented inverter include the input voltage is DC 400V, the output voltage is AC 110Vrms/60Hz, switching frequency is 21kHz, the rated capacity is 500VA and the toltal harmonic distortion of the output voltage is less than 5%. To achieve the required digital control, the microcontroller TMS320F28035 by Texas Instruments is utilized.
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