Research On Digital Control Technology Of Three-Phase PFC

The extensive application of power electronics devices in power system, industry, traffic and family brings serious current harmonic. So Power Factor Correction Technology becomes a new research hotspot.Based on the consultation plenty of literature at home and abroad, This thesis describes the main characters and development of PFC technology, analyzes the means and basal theory of all kinds of PFC technologies on structure of the main circuit and control mode, and illustrates the necessary and importance of the digital PFC. Based on the consultation plenty of literature at home and abroad, the paper summarized the research status quo of the three-phase high power factor rectifier's main circuit topology, expatiated on the classification, advantages and disadvantages of the current common active power factor correction control technology.Based on the work above, The paper summarized the research status quo of the three-phase high power factor rectifier's main circuit topology, expatiated on the classification, advantages and disadvantages of the current common active power factor correction control technology, further more, it compared the analog and digital control method. Finally, designs a small power digital Boost PFC converter, this converter works in average current control means and based on TMS320LF2407 DSP.The control of PFC is digital control, It brings the advantages of sample circuit, immunity to noise, high reliability and debug expediently. So it is easy to up date system with immovable circuit to satisfy and the need of variational clients.In the thesis the hot problems and development of PFC technology are analyzed farther. It establishes good foundation for future research.