Study Of Singe-stage Power Factor Correcter Technology

With the continuous growth of the world’s total population, the human material life hasbecome increasingly rich, which make the consumption of energy increase significantly.While in increasing energy production, more attention should be paid on electric energyconservation and utilization rate of electric energy. Structure of single stage power factorcorrection technology is relatively simple, low cost, and widely popular in practicalapplication. It is also the main reason to become research hot. In order to improve the qualityof power grid, improve efficiency in the use of electricity, it should be added to the powerfactor correction circuit in the electrical equipment, the most commonly used is the traditionalBoost PFC topology. This paper introduces the work principle of Boost circuit, and then usethree different kinds of control algorithm to simulate analyze, the simulation result shows bythe form of a table. Through the parameter comparison, it could clearly understand theadvantages and disadvantages of the three kinds of control algorithms of their respective, inorder to provide the reference suggest for the control strategy selection of the hardware circuitin experiment machine.With the rise of the switching frequency of the switching devices and increase theelectrical equipment power, because of the power loss problems caused by rectifier bridge inthe conventional Boost PFC circuit, greatly reducing the efficiency of electric energyconversion, the corresponding limits its use in high power applications. Bridgeless Boost PFCtopology came into being, because eliminating the rectifier bridge portion, the loss caused byrectifier bridge problems disappear, so that the utilization of electric energy correspondingincrease. Bridgeless Boost PFC applications meet the requirements of high-power occasions.Because the sampling circuit in the basic type of bridgeless Boost converter is complex,andthe electromagnetic interference is serious.Aiming at these problems, scholars have proposedmany improvement measure. The last part of this paper, describe the working process of theimproved bridgeless Boost PFC circuit and use its single-cycle control algorithm for thesimulation analysis. Then, the design of a power of2000W experimental prototype.Inrespectively under the condition of full load and half load to measure the input current, inputvoltage and output voltage waveform. By contrast, it found that the input current can track theinput voltage waveform automatically.When the circuit reaches steady state, the outputvoltage ripple changes in the design requirement. The objective of power factor correctionhave achieved perfectly. Finally, in different load conditions measured by numerical,described in table and picture form, easy to understand the performance of prototype directly.The power factor values measured in different load conditions are described by table andpicture form, which is easy to understand the performance of experiment prototype directly.