A current - doubler - rectifier ( cdr ) zvs pwm h - fb tl converter is proposed in this paper , the proposed converter can achieve zvs for all the switches in a wide load range with the use of the energy stored in the output filter inductance , in the meanwhile , the voltage oscillation and voltage spike across the rectifier diodes resulted by the reverse recovery are eliminated 为了消除输出整流二极管反向恢复造成的的电压尖峰和振荡,同时使所有开关管在很宽的负载范围内实现zvs ,本文提出了倍流整流方式的zvspwmh - fbtl变换器。
The sample with low emitter efficiency has completed as the method of above . this lead to the greatly decrease of the reverse recovery time and the low reverse leakage and forward voltage , especially the excellent temperature character of the leakage . the test date shows that the samples reach the first class of international level 本论文作者通过仿真测试,验证了课题研究的理论设想,并设计制作了具有低阳极发射效率结构的高压功率frd ,利用局域铂掺杂和电子辐照相结合的寿命控制方式,实现器件反向恢复时间的极大减小,并且反向漏电流、软度因子、正向压降等关键参数也较理想,且具有极佳的漏电温度特性,达到器件综合性能的优良折衷,达到国际先进水平。
Saturable inductance is introduced to eliminate the voltage swing and overshooting on the output rectifier diodes , then discusses its parameter design in detail ; find out the mechanism of the body diode ' s reverse recovery effect of the chopping switches , give out several relevant solutions and verified by experiments 为了消除输出整流二极管上的电压尖峰和振荡,同时为了使滞后桥臂的开关管能够在宽负载范围内实现软开关,给输出整流二极管串入了饱和电感,给出饱和电感的设计方法。
The researching results indicate the reverse recovery characteristics of the device are much improved : the reverse recovery time is remarkably shorted , the peak reverse current is notably reduced and the soft factor s is also increased in various degrees but not notable changed in forward drop when introducing the two kinds of novel structure 结果表明,采用新结构后,反向恢复特性大大改善,恢复时间明显缩短,软度因子s显著提高,反向峰值电流也有不同程度的降低,其综合性能远远高于si同类型结构及常规p ~ + ( sige ) - n ~ - - n ~ +二极管。