差模零偏置微感抗降压型直流变换方法研究

Research on DC/DC Buck Switching Zero Bias Converter Using Differential-mode Low Inductance

针对Buck变换器在实际使用中,降压电感的铁心磁通存在非零偏置及控制所造成的问题,提出了一种新颖的差模零偏置微感抗降压型直流变换方法,并将该方法应用于工程实践。该方法的关键在于使用差模电感自补偿特性实现了铁心磁通的零偏置,通过超前臂互补同步控制、滞后臂过零复合同步控制,实现了差模电感在直流斩波条件下的正常工作。

According to the problems of the Buck converter in practical use, a new DC/DC Buck switching zero bias converter using differential-mode low inductance is presented which is used in project practice.The key of the method is realized the zero bias of the iron core flux by using the self-compensation feature of differential-mode inductor.It is also achieves differential-mode inductor＇s normal operation in DC inductance conditions according to the synchronous control of the ultra forearm complementary and the synchronous control of the lag arm zero composite.