一种负载适应的电流尖峰限制型功率管开通方法  

A Load Adaptive Turn-on Method for Power Switches With Current Spike Limitation

作　　者：伍群芳[1] 陈仲[1] 王勤[1] 袁义生[2] 肖岚[1] 

机构地区：[1]江苏省新能源发电与电能变换重点实验室(南京航空航天大学),江苏省南京市210016 [2]华东交通大学,江西省南昌市330013

出　　处：《中国电机工程学报》2016年第8期2242-2251,共10页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51467005;51377082);江苏省普通高校研究生科研创新计划项目(KYLX15_0275);江苏省高校优秀科技创新团队资助项目~~

摘　　要：在传统驱动电路中,固定的驱动参数使开关损耗无法得到优化,针对这个问题提出一种负载适应的功率管开通方法,功率管的开通速度可随负载的变化而自适应的调整,以一个常见的平均电流控制型Boost电路为例,阐述所提出方法的控制原理,详细分析恒流驱动下功率管的开通特性及开通损耗。以LT3086为核心设计驱动电路,设计的原则是小电流下(轻载)功率管的开通电流尖峰不大于额定电流下功率管的开通电流尖峰。最后建立了一台功率为1 kW/200 V输入/400 V输出的Boost实验样机,实验验证了所提出方法的有效性,结果表明轻载下变换器的效率比传统驱动的方法可提高0.9%以上。In conventional driver circuit, the method of fixed-driving-parameters couldn＇t optimize the switching losses. To solve this problem, a load adaptive turn-on control method for power switches was proposed, the turn-on speed of power switches could be regulated adaptively with load change. The control theory was presented in a boost converter with average current control mode, the turn-on characteristics and power losses under constant current driving were analyzed. Besides, the driving circuit as the core of LT3086 was designed and the designing-principle must be observed that turn-on current spike under a smaller current was not greater than the current spike under a rated current. Finally, one prototype of boost converter with 1 k W output power 200 V input voltage 400 V output voltage was built to verify the proposed method. The test results shows that the theory is correct and the efficiency of prototype using the proposed method under light load rises by more 0.9% than that using a traditional driving method.

关 键 词：负载适应 电流尖峰 开通速度 功率损耗 驱动电路 

分 类 号：TM46[电气工程—电器]