半橋式功率因數修正器雙電容不平衡修正之研製

Study and Implementation of the Split Capacitor Voltage Imbalance Correction in Half-Bridge DCM PFC

黃智強(Jhih-Ciang huang)

指導教授 ： 歐勝源

國立臺北科技大學/電資學院/電力電子產業研發碩士專班/碩士(2007年)

https://doi.org/10.6841/NTUT.2007.00189

摘要

本論文旨在研製一單相雙開關半橋式功率因數修正器，藉由其改善功率因數之補償特性，使得電源端之輸入電流相位能夠追隨輸入電壓相位，並且滿足後端電子產品之負載變化。
根據功率因數修正的基本原理，以峰值電流模式作為控制方法，控制單相雙開關半橋式功率因數修正器電流工作在不連續模式DCM（Discontinuous Conduction Mode）下，並探討單相雙開關半橋式功率因數修正器其雙輸出電容電壓不平衡的成因，與其工作於單輸出、雙輸出下的差別，並藉由新式控制策略之分析提出解決方案。接著設計控制電路並實作電路進行實測，透過實驗結果驗證控制法則的可行性。

關鍵字

單相雙開關半橋式功率因數修正器 ； 電壓不平衡 ； 電流模式控制 ； 功率因數修正

並列摘要

A single-phase half-bridge rectifier with power factor correction operating in DCM is presented in this thesis. Among various topologies, the half-bridge rectifier is the only one that can provide double DC output voltages but it exists voltage imbalance between the two split capacitors. The voltage imbalance is discussed and analyzed, and the balancing control strategy is proposed to compensate the voltage differences caused by distinct conducting loop, small DC offset and initial conditions of the split capacitors. We also implement a balance control circuit to eliminate the imbalance phenomenon between the two output capacitors.
The experimental results and simulations are given to verify the theoretical discussions.

並列關鍵字

Half-Bridge Rectifier ； Voltage Imbalance ； Power Factor Correction

參考文獻

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