摘要
在某新型坦克炮控系统中采用升压变换电源实现了装甲车辆26～270V的电压变换,但这种硬开关推挽式升压电源存在着电磁干扰严重、效率低的缺点。为改善坦克内部的电磁环境,进一步提高电源效率和可靠性,设计并成功研制了一种新型ZCT推挽正激软开关升压电源。通过在推挽变压器的二次侧引入辅助谐振电路,实现主开关管的零电流关断,彻底消除了因变压器漏感而产生的关断尖峰电压。在分析ZCT推挽正激主电路工作原理的基础上,给出了电路关键参数计算公式;通过试验波形和效率曲线分析,进一步验证了该新颖ZCT推挽正激升压电源具有的高效率、低电磁干扰的优点。
A Boost converter which can transfer 26VDC into 270VDC was designed for a novel tank gun control system. But it has some drawbacke such as EMI and low efficiency because of the push-pull circuit＇s hard switching. In order to improve tank＇s EMI condition and the Boost converter＇s efficiency, a novel ZCT push-pull forward soft switching power supply is developed successfully. The resonant circuit is adopted in the secondary side of push-pull transformer. The main switching devices＇ turn-off with zero-current character is realized. Thus, the spike voltage due to the transformer＇s leakage inductance is vanished totally. Based on analyzing the principle of the ZCT push-pull forward main circuit, calculating formulas of key parameters are given in this paper. The merits of high efficiency and low EMI of ZCT push-pull forward converter are identified by analyzing the waveforms and efficiency curves
出处
《电工技术学报》
EI
CSCD
北大核心
2007年第10期127-132,共6页
Transactions of China Electrotechnical Society
