不间断电源(UPS)在生活和工业中应用十分广泛。传统UPS电源输入侧直接接在电网上,输入电流谐波含量高,网侧输入功率因数很低,对电网造成污染。该文提出在UPS的输入侧加入功率因数校正环节,通过无桥Boost PFC对网侧电流进行控制,使网侧电流跟踪电压相位,大大提高网侧输入的功率因数,几乎消除了对电网的谐波污染,达到清洁使用电能的目的。本文详细分析了无桥BoostPFC电路的工作原理,通过Matlab/Simulink进行了系统的仿真,并进行了硬件实验,仿真和实验结果验证了提出方法的正确性和可行性。 Uninterruptible power supplies (UPS) are widely used in life and industry. Traditional UPS power input side directly connected to the grid, the input current harmonic content is high, the network side input power factor is very low, causing pollution to the power grid. This paper proposes to add a power factor correction link to the input side of the UPS to control the grid-side current through a bridgeless Boost PFC so that the grid-side current tracks the phase of the voltage and greatly increases the power factor input on the grid side, Wave pollution, to achieve the purpose of clean use of electricity. This paper analyzes the working principle of the bridgeless BoostPFC circuit in detail, carries on the system simulation through Matlab / Simulink, and carries on the hardware experiment. The simulation and experimental results verify the correctness and feasibility of the proposed method.