| Summary: | 碩士 === 明志科技大學 === 電機工程系碩士班 === 103 === This thesis presents the development of single-phase three-arm automatic voltage regulators. In this system, the three-arm full-bridge circuitry with boosting inductor in series at input side and low-pass filter in parallel at output side are proposed to regulate single-phase AC to electrical power with constant-voltage. It can not only maintain voltage stability at output side, but also decrease the size and cost of the system. The control strategy operated under phase-compensated amplitude-locked loop algorithm can provide a single-phase source with fast response, stable and low harmonic distortion power to loads.
In this thesis, the mathematical model of single-phase three-arm automatic voltage regulators are built and simulated by Matlab/Simulink. Then, a high-performance and low-cost micro-controller (MCU, Renesas RL78G14) is used to control the system for reducing the circuit complexity. A prototype of 1kW voltage regulation system is developed. The system can feed proper power, while the rated effective output voltage is 110V and the frequency is 60 Hz. Besides, the simulation data show that the voltage harmonic distortion is 1.01%, which complies with IEEE Std. 519.
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