| Summary: | 碩士 === 國立台灣工業技術學院 === 電子工程技術研究所 === 85 === For a long time,the power electronic products have been a
question of lowerpower factor that caused energy wastage,power
electronic system pollution,ect.Cnosequentlly, the PFC is
attached to the tradictional AC-to-DC converter comp-osed of
four diodes and bulk capactior.The equipments make use of energy
effic-iently because of the hight power factor. But it caused
the questions not onlylarge ripple wave and noise but also
electronmagnetic interfence(EMI). Nowadays SPICE is the most
popular electronic circuit simulation program.The PC tool,
especiallly,has become student' favorite. This paper tried to
cons-truct a PFC(Use UC3854)maceo model under the circumstances
of SPICE. To partit-ion the total PFC system into several
fuction block. First of all, construct the fuction block into
submodel. Secondly,combine tne submodel and terminal
characteristics into the require macro model. Thirdly,analy and
design the fee-dback control network by the require macromodel.
Finally,not only a design example is given and experimentation
show satifatory results and compare withthe theorem but also EMI
considerations is given.
|
|---|
