Study Of A New-Type Interleaving Double-Transistor Forward One-Stage Power Factor Correction Converter

With the development of the power electronics technique, for reforming the input current waveforms and improving the power factor ,AC/DC Power Supply,in order to compliance with IEC 1000-3-2 harmonic regulation and realize low-cost,high-Performance,the single-stage power factor techniques have gained much attention these years,especialy in low Power applications. A single-stage PFC converter combines the PFC stage and a DC/DC converter into onstage with a shared switch and controller.Implements the input current shape and provide tight output regulation. The study on single-stage PFC technique has important significance for restraining harmonic pollution and realizing miniaturization and lightweight of switching power supplies.the paper summarizes the passive PFC approach and the active two-stage PFC approach and the active single-stage PFC approach are analyzed and compared. and analyses the scope of application and the virtues and defects. On the labor basis, a novel interleaving parallel single stage power factor correction circuit is proposed. The circuit apply the interleaving parallel technique and could depress the switching frequency, the current ripple and the stress on the power device. This circuit not only realizes the power factor correction but also adjusts the output voltage at the same time.In this paper, the circuit evolutionary process is introduced, and the work principle of the circuit in Continuous Conduction Mode (CCM) is detailedly analyzed. The circuit can effectively reduce the wastage of the power devices and realize the electrical isolation, at the same time the high frequency transformer needn't demagnetization and resetting. For the sake of high power factor of the circuit, the controller chip uses IR1150 produced by international rectifier company. The work principle and some preferences of the chip are introduced. Its inner composing is simulated with schism component and also the simulation analysis has been completed.In the end, the research of experiment is implemented on the tradition Boost PFC and interleaving parallel PFC. They are based on One-cycle control of IR1150. The research of experiment is implemented on proposed topology of the novel interleaving parallel and double-transistor forward single stage power factor correction circuit and control methods. A prototype is designed.