移相控制全桥零压零流软开关功率变换器谐振过程分析和参数设计方法  

Resonant procedure analysis and parameters design approach for phase-shift controlled full-bridge power converter with zero-voltage and zero-current soft-switching

作　　者：夏铸亮[1] 朱志明[1,2] 陈俊杰[1] 

机构地区：[1]清华大学机械工程系,北京100084 [2]先进成形制造教育部重点实验室,北京100084

出　　处：《电焊机》2013年第1期9-14,48,共7页Electric Welding Machine

基　　金：国家自然科学基金资助项目(51075231);教育部博士学科点专项科研基金资助项目(20100002110064);铁道部科技研究开发计划重大资助项目(2008G001-C);清华大学自主科研计划资助项目(2009THZ06054)

摘　　要：移相控制全桥软开关功率变换器广泛应用于各种电弧焊接与切割电源。针对焊接电弧的宽负载工作范围,为实现全负载范围的滞后臂功率器件软开关,对变压器一次侧串联饱和电感和隔直电容的移相控制全桥软开关功率变换器的谐振工作过程进行了深入的理论分析,提出实现滞后臂功率器件软开关的饱和电感设计准则,并对不同脉冲宽度和负载电流下的滞后臂功率器件软开关状态进行了仿真研究,验证了理论分析的正确性。在理论分析和仿真研究的基础上,给出了饱和电感总磁通和隔直电容大小的参数设计和选取方法。The phase-shift controlled full-bridge soft-switching power converter has been widely applied in various electric arc welding and cutting power supplies.Aimed at the wide operating range of welding arc load ,the in-depth theoretical analysis is carried out with the resonant procedure of the phase-shift controlled full-bridge soft-switching power converter,in which an saturation inductor and blocking capacitor is connected in series with the primary of transformer, in order to realize the soft-switching of lagging-leg power semiconductors in full load range,and then a design criterion of saturation inductor,to achieved the soft-switching of lagging-leg power semiconductor,is proposed.After that,the simulation study is made to the soft-switching situation of lagging-leg power semiconductors with different pulse width and load current,and the correctness of theoretical analysis is validated.Based on the theoretical analysis and simulation study,the parameters design and selection approach is given h）r the total magnetic flux of saturation inductor and the value of blocking capacitor.

关 键 词：软开关 饱和电感 隔直电容 谐振过程 

分 类 号：TG434.1[金属学及工艺—焊接]