摘要
本文在对APFC模块电路中的并联均流技术进行讨论的基础上，着重对内部单元电路间的并联均流技术进行了深入研究，并对一种新的并联均流技术进行了理论分析、模拟仿真，结合中功率(3KW)ZVT-APFC模块电路实验，探讨了这种并联均流技术应用在APFC电路中的设计方法。实验结果表明该种均流技术对于实现中大功率的APFC电路是十分有用的，与其他均流技术相比，减少了成本，简化了电路结构，使该电路的均流特性得到改善，同时也验证了文中采用的设计方法是可行的。
A new technique useful for parallel connection of commutation cells is introduced in this paper, it consists of using small inductance in order to ensure dynamic and static share of the commutated current among the different switches. Operation principle, theoretical analysis and designing procedure are presented.
Experimental results, obtained from a 3000W boost prototype using two commutation cells. The practical circuit presented a power factor of 0.97,a harmonic percent (input current) of 6.5% and an overall efficiency of 97.5%.The results accord with IEC555-2 and have been used to validate the theoretical analysis and demonstrate the effectiveness of the proposed technique.
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