一种低输入电流纹波高增益软开关DC-DC变换器  

Low input current ripple high gain soft switching DC-DC converter

作　　者：林国庆[1] 何恩义 LIN Guoqing;HE Enyi(Fujian Key Laboratory of New Energy Generation and Power Conversion,Fuzhou University,Fuzhou 350116,China)

机构地区：[1]福州大学福建省新能源发电与电能变换重点实验室,福建福州350116

出　　处：《电机与控制学报》2023年第5期65-75,共11页Electric Machines and Control

基　　金：福建省科技计划(2015H0017);晋江市福大科教园区发展中心科研项目(2019-JJFDKY-37)。

摘　　要：针对新能源发电系统输出电压低、电压稳定性差等问题,提出一种非隔离型低输入电流纹波高增益软开关直流变换器。该变换器结合有源钳位技术和耦合电感与二极管-电容倍压结构,提高了变换器的电压增益,降低了开关器件的电压应力。耦合电感自身漏感有效缓解二极管反向恢复问题,并通过有源钳位网络回收利用了漏感的能量,开关管无关断电压尖峰。利用耦合电感漏感,所有开关管均实现了零电压软开关,提高了变换器的效率。详细分析了变换器的拓扑结构与工作原理,并对电压增益、器件电压电流应力、软开关等电路性能进行了分析。最后,搭建了一台40 V输入、400 V输出、额定功率为160 W的试验样机,实验验证了该变换器具有低输入电流纹波、高电压增益、高变换效率和低电压应力等优点。In order to solve the problems of low output and poor voltage stability in new energy power generation system,a non-isolated low input current ripple high gain soft switching DC-DC converter was proposed.Combined with active clamp technology and coupled inductance and diode-capacitor voltage doubling structure,by the converter the voltage gain was improved and the voltage stress of the switching device was reduced.The leakage of the coupling inductance effectively alleviates the diode reverse recovery problem,and the leakage energy was recovered and utilized through the active clamp network.Using coupling inductance leakage,all switching tubes realize zero voltage soft switching,which improves the efficiency of the converter.The topology structure and working principle of the converter are analyzed in detail,and the voltage gain,voltage and current stress of the device and the circuit performance of the soft switch were analyzed.Finally,a prototype with 40 V input,400 V output and 160 W rated power was built.The experimental results show that the converter has the advantages of low input current ripple,high voltage gain,high conversion efficiency and low voltage stress.

关 键 词：新能源发电 非隔离 高增益 低输入电流纹波 耦合电感 零电压软开关 

分 类 号：TM46[电气工程—电器]