摘要
分析了电池化成应用中对双向直流变换器的需求,以及氮化镓(GaN)开关管相比于传统硅(Si)开关管的优势。给出了基于GaN器件的隔离型双向全桥直流变换器移相控制时的软开关实现方法,通过设计合适的变压器寄生电容实现开关管的零电压开关(ZVS)。制作了一台功率为300 W、开关频率为200 kHz的实验样机。利用GaN开关管的寄生电容和谐振电感以及变压器的寄生电容,在升压模式下实现了开关管的全负载ZVS,在降压模式轻载条件下实现了开关管的ZVS。实验结果证明了方案的有效性和可行性。
The demand for bidirectional DC converters in battery formation applications and the advantages of gallium nitride(GaN)switching tubes compared to traditional silicon switching tubes are analyzed.The method of implementing soft switching in phase shift control of isolated bidirectional full-bridge DC converter based on GaN device is given,and the zero voltage switch(ZVS)of the switching tube is realized by designing suitable transformer parasitic capacitance.An experimental prototype with a power of 300 W and a switching frequency of 200 kHz is made.Utilizing the parasitic capacitance and resonant inductance of the gallium nitride switching tube and the parasitic capacitance of the transformer,the full load ZVS of the switching tube is realized in the boost mode,and the ZVS of the switching tube is realized under the light-load condition of the buck mode.The experimental results prove the effectiveness and feasibility of the plan.
作者
刘春喜
乔宇
郑文帅
马喜龙
LIU Chun-xi;QIAO Yu;ZHENG Wen-shuai;MA Xi-long(Liaoning Technical University,Huludao 125105,China)
出处
《电力电子技术》
CSCD
北大核心
2020年第10期60-63,共4页
Power Electronics
基金
国家自然科学基金(U1510128)。
关键词
变换器
氮化镓
零电压开关
电池化成
converter
gallium nitride
zero voltage switching
battery formation
