| Summary: | 碩士 === 國立高雄第一科技大學 === 綠色能源及IC設計產業碩士專班 === 103 === Inverter converts DC source to AC output and becomes much more popular in power electric industry. But the system control of inverter is much more complex than converter which only need a single control IC to complete the overall control procedure. Traditional inverter uses a lot of logic control circuit to control the system. But, it takes lots components, increases circuit area, consumes much power, and is difficult for changing control process. On this ground microcontroller unit (MCU) is developed for solving above weaknesses. There are many advantages for one MCU to handle complex system control, such as small volume, low power consumption, high performance, and easy to change internal program by compiler software. General MCU supplies functions like timer, A/D converter, PWM, interrupt, and reset. Also, it can compile and program by general program language. In this thesis, system control procedure will be analysed meticulously, which covers start procedure, utility signal and input signal detection, sinusoidal PWM initial for converting DC signal to AC, adjusting high-low unipolar SPWM’s gain and phase, turning on relays to grid-connected mode after all condition is clear, adjusting output power by derivation for relationship between SPWM’s gain and phase angle, and completing overall control process.
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