摘要
针对双向DC/DC变换器存在的开关损耗高等问题,提出了一种新型的隔离型双向软开关DC/DC变换器。该变换器由对称的拓扑结构组成。在电感和变压器漏感的作用下,变换器中的开关元件能够在较大的负载范围内实现零电压开关,同时在脉宽调制的控制下,二极管实现了零电流关断。这些措施减小了开关损耗、电压电流应力以及电磁干扰。分析了工作原理和开关过程,研制了一台500 W的试验样机并进行了试验。试验结果证明:在轻载和重载的条件下,所有的开关管都能够零电压导通,同时二极管能够在电流为零(ZCS)的情况下自然关断。
A soft switching bi-directional DC/DC converter was developed to reduce switching losses. The converter has two symmetrical topologies. Zero voltage switching is realized for all switches over a large load range by using an inductor and the leakage inductance of a high frequency transformer. The diode＂ reverse recovery is also reduced with zero current switching with pulse-width modulation control. These measures reduce the switching losses, the current and voltage stresses and the electromagnetic interference. A 500 W prototype was built and tested to show that all the switches can operate in the zero voltage switching condition from light loads to heavy loads and that the diodes achieve soft switching with the zere current switching.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第10期1657-1660,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家"八六三"高技术项目(2005AA501130)
台达电力电子科教发展基金资助项目(DRE02006002)
