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Auxiliary power supply voltage source distributed research

Author: LiZuo
Tutor: LvZhengYu
School: Zhejiang University
Course: Power Electronics and Power Drives
Keywords: DPS LLC resonant converter AC bus
CLC: TM919
Type: Master's thesis
Year: 2006
Downloads: 243
Quote: 3
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Abstract


This thesis studies a frequency-variation controlled AC bus distributed power supply.By summarizing the existing techniques, some common used topologies are introduced;the study background of distributed auxiliary power supply is as well discussed.Due to the high reliability, high stability and low EMI criterions in auxiliary power supply systems, the half-bridge LLC resonant converter is selected for the front-end converter, the AC bus architecture and full-wave rectifier are as well utilized. The turns-ratio between the AC bus and load converter is 1:1. The effect of beads which are used in the load converters to the resonant circuit is analyzed.This thesis uses the sinusoidal steady-state analytical method to analyze the whole system. The sinusoidal steady-state analytical method discovers the relationship between some resonant parameters and system DC gain and provides the fundamental for the resonant parameter selection. The approximate expression of parasitic inductance of flat line and twisted pair line is proposed after the study of parasitic inductance in the AC bus. This guides the selection of the AC bus’s length, type and other properties.Theoretical analysis is verified by comparing different wave forms of prototype with 22 outputs of 15V, 0.3A under different circumstances.Based on the prototype, some advice on the system’s generally and flexibility is proposed.

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CLC: > Industrial Technology > Electrotechnical > Independent power supply technology (direct power) > Other independent power
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