车载单相正弦波逆变电源设计技巧.doc

单相正弦波逆变电源设计 摘要：本单相正弦波逆变电源的设计12V蓄电池作为输入，输出V、50Hz的正弦波交流电。该电源采用推挽升压和全桥逆变两级变换在控制电路上，前级推挽升压电路采用SG3525芯片控制逆变部分采用IR2110进行全桥逆变，采用U3990F6完成SPWM的调制，在保护上，具有输出过载、短路保护等多重保护功能电路，增强了该电源的可靠性和安全性STC89C52单片机的控制进行模数转换，最终将电压值显示到液晶12864上，形成了良好的人机界面。该电源很好的完成了各项指标，输入功率为46.9W，输出功率为43.6W，效率达到了93%，输出标准的50Hz正弦波。 关键词：单相正弦波逆变 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 目录 1.系统设计 4 1.1设计要求 4 1.2总体设计方案 4 1.2.1设计思路 4 1.2.2方案论证与比较 5 1.2.3系统组成 8 2.主要单元硬件电路设计 9 2.1 DC-DC变换器控制电路的设计 9 2.2 DC-AC电路的设计 10 2.3 SPWM波的实现 10 2.4 真有效值转换电路的设计 11 2.5 保护电路的设计 12 2.5.1 过流保护电路的设计 12 2.5.2 空载保护电路的设计 13 2.5.3 浪涌短路保护电路的设计 14 2.5.4 电流检测电路的设计 15 2.6 死区时间控制电路的设计 15 2.7 辅助电源一的设计 15 2.8 辅助电源二的设计 15 2.9 高频变压器的绕制 17 2.10 低通滤波器的设计 18 3.软件设计 18 3.1 AD转换电路的设计 18 3.2液晶显示电路的设计 19