基于C8051F330单片机的交流单相在线式UPS设计

The Design of AC Single-phase On-line Uninterruptible Power Supply Based on C8051F330

该文设计了一款以C8051F330单片机为主控制器的24V交流单相在线式不间断电源。系统由隔离变压器、整流电路、切换开关、蓄电池、充电电路、SPWM波发生器、DC／AC逆变桥和峰值检测电路组成。实验结果表明，UPS系统实现了市电和蓄电池供电的无触点自动切换；具有过充保护、欠压保护和过流保护功能；大大提高了电压和负载调整率，消除市电干扰对用电设备的影响，同时避免负载对市电的干扰，输出电能可靠性高，质量高。

This article introduces a 24V AC single-phase on-line uninterruptible power supply which is controlled by C8051F330 MCU. The system consists of isolation transformer, rectifier, switch, battery, charging circuit, SPWM wave generator, DC / AC inverter bridge and the peak detecting circuit. Debugging and results of test indicate that the LIPS system achieves the power and battery-powered non- contact automatic switching;has over-charge protection, under voltage protection and over-current protection; greatly increases the voltage regulation rate and load regulation rate, eliminates the influence from the grid disturbance on electrical equipment, can avoid the interferenee of the load on the grid ,and gets the output power with high reliability and quality.