| Summary: | 碩士 === 國立雲林科技大學 === 電機工程系 === 107 === This thesis studies an 80Plus-certified power converter to improve circuit efficiency by using zero voltage switching technology. Among lots of power conversion technologies, LLC resonant converter has many advantages such as low switching loss and high efficiency. The resonant tank is used in the LLC resonant converter. Since the input impedance of resonant tank is operated at inductive load, the input fundament current is lagging to the fundamental voltage. Therefore, power switches can be turned on at zero voltage switching over wide range of input voltage and load current.
In addition to clarifying the operating principles and design principle of the LLC architecture, Microsoft Excel is used to plot the frequency response curve in order to understand the effect on the voltage gain under different conditions. Finally, a 350W LLC resonant converter was developed by using the variable frequency control IC UCC25600. The electric specifications of the LLC converter are Vin=300V~400V, Vo=12V, and Io=29A. Finally, experiments are provident to show the circuit performance.
|
|---|
