Semi-bridgeless boost PFC rectifier for wide voltage input range based on voltage feed-forward control

摘要

Considering the advantages and disadvantages of the circuit topology of traditional Boost PFC, two phase interleaved Boost PFC, basic type bridgeless Boost PFC and semi-bridgeless Boost PFC, a rectifier based on the semi-bridgeless Boost PFC with wide range input voltage is proposed. The circuit works in CCM mode, uses double closed loop control strategy, i.e. , the inner current loop uses average current control, the outer voltage loop uses the PI control strategy. In order to verify the performance of the proposing circuit, this circuit is simulated by using the SimPowerSystems kit in Matlab/simulink software, and a 660W prototype of the proposed rectifier based on the digital control chip TMS320F2812 is realized. The simulation and experimental results show that, the rectifier output a stable DC voltage while its input voltage at 140V – 260V, and its ripple voltage is low, the input current waveform can follow the input voltage waveform, its power factor is close to unit, the THD is less than 5% at 100 kHz switching frequency.