摘要：本單相正弦波逆變電源的設計，以12V蓄電池作為輸入，輸出為36V、50Hz的標準正弦波交流電。該電源采用推挽升壓和全橋逆變兩級變換，在控制電路上，前級推挽升壓電路采用SG3525芯片控制，閉環反饋；逆變部分采用驅動芯片IR2110進行全橋逆變，采用U3990F6完成SPWM的調制，后級輸出采用電流互感器進行采樣反饋，形成雙重反饋環節，增加了電源的穩定性；在保護上，具有輸出過載、短路保護、過流保護、空載保護等多重保護功能電路，增強了該電源的可靠性和安全性；輸出交流電壓通過AD637的真有效值轉換后，再由STC89C52單片機的控制進行模數轉換，最終將電壓值顯示到液晶12864上，形成了良好的人機界面。該電源很好的完成了各項指標，輸入功率為46.9W，輸出功率為43.6W，效率達到了93%，輸出標準的50Hz正弦波。
關鍵詞：單相正弦波逆變 DC-DC DC-AC SPWM
Abstract: The single-phase sine wave inverter power supply design, battery as a 12V input and output for the 36V, 50Hz standard AC sine wave. The use of push-pull power booster and two full-bridge inverter transform，in the control circuit, the pre-boost push-pull circuit using SG3525 chip control, closed-loop feedback; inverter driver IC IR2110 in part to the use of full-bridge inverter using SPWM modulation U3990F6 completed, level after the use of current transformer output sampling feedback. The feedback link in the formation of a double and increase the stability of power. In protection, with output overload, short circuit protection, over current protection, the protection of multiple no-load protection circuit, which enhancing the reliability of the power supply and safety. AC voltage output of the AD637 True RMS through conversion, and then from the control of single-chip STC89C52 analog-digital conversion, the final value of the voltage to the liquid crystal display 12864 on the formation of a good man-machine interface. The completion of the power good indicators, input power to 46.9W, output power of 43.6W, the efficiency reached 93%, 50Hz sine wave output standards.
Key words: Single-phase sine wave inverter DC-DC DC-AC SPWM
