Modeling And Design Of PFC Rectifier For Communication Power Supply

Communication power is essential for communication equipment,and communication power supply is generally designed with high efficiency switching power supply.Switching power supply converts ac into dc by bridge rectifier circuit,then filters with large electrolytic capacitance to obtain stable voltage,and finally the switching circuit is used for conversion.This way will increase the input harmonic content,reduce the power factor,and seriously affect the quality of the grid.The power factor correction(PFC)rectifier can improve the power factor by rectifying the input current so that the input current follows the input voltage at low frequency.This paper mainly models the single-phase boost type(BOOST)PFC rectifier.the PFC circuit works in current continuous mode.the controller selects ICE2PCS01 from infineon,and the control mode is average current mode.Firstly,the BOOST circuit is modeled,and the average model of resistive load and constant power load and the small signal model of AC are obtained,and a method of BOOST circuit modeling in PFC circuit is proposed.Then the current loop and voltage loop in the PFC circuit are modeled,and the transfer function of each link is obtained.Then,with a 1k W constant power load as an example,the compensation circuit parameters in the loop are designed,and the loop model is established using SIMetrix simulation software to obtain the open-loop bode diagram and the closed-loop bode diagram of the current loop as well as the open-loop bode diagram of the voltage loop.Finally,the SIMPLIS simulation software is used to establish the circuit model of each link in the PFC circuit and carry on the time domain simulation,and the waveform obtained by the simulation verifies the correctness of the modeling and design.