高功因升壓型整流器之研製：邊界與連續導通模式

Implementation of High Power Factor Boost Rectifiers:BCM and CCM

黃建智(Chien-Chih Huang)

指導教授 ： 楊松霈

共同指導教授 ： 陳信助(Shin-Ju Chen)

崑山科技大學/工程學院/電機工程研究所/碩士(2011年)

摘要

本文分別以邊界導通模式之峰值電流模式控制法、邊界導通模式之固定導通時間模式控制法及連續導通模式之平均電流控制法，實現高功因升壓型整流器，使其具有高功因與穩壓之特性。
高功因升壓型整流器採用邊界導通模式之控制方式，相較於連續導通模式，其不須做電流控制，而是採用電流的控制策略，使輸入電流操作在邊界導通模式，自然達高功因特性；由於其不須電流控制器，故可減低控制電路所需耗費以降低成本。但是，其輸入電流的峰值會隨著輸入功率提高而變大，使得元件所須承受的電流應力增加，因此，其不適用於高功率的應用。
最後，分別以峰值電流模式控制法IC L6561、固定時間導通模式控制法IC FAN7530及平均電流控制法IC UC3853為控制核心，研製三組輸入電壓 、輸出電壓400 V、輸出功率50~300 W之高功因升壓型整流器，並藉由實作結果驗證其均具有高功因與穩壓性能。此外，由實作結果，亦發現使用UC3853做控制，整流器具有的功因特性較好；使用FAN7530做控制，整流器具有較高的轉換效率；使用UC3853做控制，整流器承受的電流應力較低。

關鍵字

高功因升壓型整流器 ； 邊界導通模式 ； 峰值電流模式控制法

並列摘要

In this thesis, the peak current mode control method, constant on-time mode control method and average current control method are applied to the boost rectifier to exhibit the performances of high power factor (HPF) and output voltage regulation. The HPF boost rectifier, controlled by peak current mode control method or constant on-time mode control method, is operated in boundary conduction mode (BCM). On the other hand, the average current control method is used for boost power factor correction (PFC) application that operates in continuous conduction mode (CCM).
A simple control current control strategy is adopted for the boost rectifier to make the inductor current operate in BCM. Moreover, since the turn-on time is constant, the peak inductor current is proportional to the rectified input voltage In this way ,the average input current follows the input voltage waveform, thereby obtaining a high power factor performance. Accordingly, the inner-loop current controller is not necessary in BCM PFC control. However, the input current peak becomes higher as the power increases. It means that the HPF boost converter with BCM PFC control is not suitable for high power applications.
Finally, the PFC control ICs, L6561, FAN7530 and UC3853, are respectively applied to build the output voltage 400 V, output power 300 W prototypes of HPFC boost rectifiers. The performances of high power factor and output voltage regulation despite input voltage and load variations are validated by experimental results. Furthermore, the experimental results also show that the HPFC boost rectifier with IC UC3853 has better performances of high power factor and low current stress than others, and the HPFC boost rectifier with IC FAN7530 has the highest overall efficiency.

並列關鍵字

HPFC ； boundary conduction mode ； peak current mode control

參考文獻

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