| Summary: | 博士 === 國立臺灣科技大學 === 電子工程系 === 107 === First of all, this dissertation introduces the conventional LLC-SRC (LLC-Series Resonant Converter) and interleaved LLC-SRC topology to understand the practical application requirements and the disadvantages when the application is under low output voltage and high output current. Then in response to above problems, this dissertation provides a three-phase Y-Δ connected resonant converter to solve it, and use three kinds of method to analyze this topology. At the end, the prototype topology is completed. The three methods contain the analysis of the circuit operation for knowing the circuit composition and operation sequence; Using time domain analysis for understanding the detail operation, equivalent circuit model and circuit equation; Then use the FHA (First Harmonic Approximation) to approximate the steady state transfer function and depict the three-phase Y-Δ connected resonant converter gain curve; Finally, the state plane analysis is uses for learning more about the state of resonant tank and uses with OTC (optimal trajectory control) to improve the load transient dynamic response. In order to verify the advantage and accuracy of circuit analysis about three-phase Y-Δ connected resonant converter, this dissertation presents PSIM simulation and experimental result. The specification of simulation and experiment is 48 V/5 kW. The peak efficiency can reach 96.7 % with synchronous rectification.
|
|---|
