單相交流/直流昇壓型轉換器具有功因修正功能之研究

A STUDY OF SINGLE PHASE AC/DC BOOST PRE-REGULATOR WITH POWER FACTOR CORRECTION

夏毅峰(Yi-feng Hsia)

指導教授 ： 李清元

大同大學/電機資訊學院/電機工程學系所/碩士(2005年)

摘要

本文主旨在研究一單相交流/直流昇壓型轉換器，其滿載輸出功率為350W，輸出直流電壓為250V。具有功因修正之功能，穩定的輸出直流電壓，低輸入電流漣波，在3% ~ 10%的負載下，有0.88 ~ 0.97之高功因表現。整體系統包括單相全波橋式整流器、交錯式昇壓型轉換器以及輸出濾波器。
交錯式昇壓型轉換器以反正弦脈波寬度調變技術為基礎，配合責任週期交錯控制方法，減少線電壓與線電流之間的相位差，及將線電流塑造為正弦波之形狀，並且降低輸入電流之漣波。另外，利用切換頻率控制，依據不同負載範圍，改變轉換器之切換頻率，使在其負載下有高功因之效果。
最後，系統中使用英特爾 87c196MC微處理器，配合適切的軟體及硬體來建構上述所提出的方法，並以實驗結果驗證所提出之架構，其優異性如所預期。

關鍵字

交錯式 ； 功因修正

並列摘要

The purpose of this thesis is to develop a single phase AC/DC boost type pre-regulator, the output power is 350 watts and output DC voltage is 250 volts. It has power factor correction function（PFC）, stable output DC voltage, low input current ripple and can have the high power factor around 0.88 ~ 0.97 under 3% ~ 10% loads. The system consists of the single phase full wave diode bridge rectifier, the interleaved boost type pre-regulator and output filter.
The interleaved boost pre-regulator is based on inverse sinusoidal pulse width modulation that collocates with interleaving control method of duty cycle. It can reduce phase difference between the line voltage and line current, shape the line current to sinusoidal waveform, and decrease ripple of input current. By using switching frequency control, the switching frequency of pre-regulator will change with different load ranges and get high benefit of power factor.
Finally, a single chip microprocessor Intel 87c196MC is used in this system and an experimental hardware scheme and software algorithm is established by the proposed principle. The experimental results prove the proposed structure to achieve performance as expected.

並列關鍵字

Interleaved ； Power Factor Correction(PFC)

參考文獻

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