CCM单相boost功率因数校正系统的分析与研究

AbstractA single stage CCM-BOOST power factor correction circuit with high power factor and lowelectromagnetic interference is designed in this paper.First of all,the active power factorcorrection circuit is analyzed in detail.Based on the comparison of the two stage and single stagestructures of the active power factor correction (APFC)circuit,a single stage circuit is adopted inthis paper.The Boost circuit is selected as the main circuit of the active power factor correctioncircuit,and the composition of the Boost circuit is given and its working process is analyzed.Onthis basis,the continuous conduction mode (CCM)and the average current control strategy areadopted in this paper,and DSP is used as the control chip of active power factor correction circuit.The working principle of TMS320LF2407A chip and the functions of each pin are introduced.The control input,multiplier,voltage loop and current loop part of the control part are analyzed indetail.Finally,based on the above optimization of active power factor correction circuit,theactive power factor correction circuit is optimized under the condition of input voltage of220V/50 Hz,and 400V DC power is output,and the simulation is carried out by using MATLABsoftware.Key words:power factor correction(PFC)PFC technology;MATLAB simulation;Boost circuit