摘要
由于基本升压DC/DC变换器,不能通过关断其主开关来切断输入电源,因此不具备输出保护功能。通过在其输入端增加一个隔离开关和续流二极管,得到了一种改进的升压DC/DC变换器,当变换器输出出现短路故障时,通过启动输出短路保护电路使隔离开关关断,同时启动主开关导通,可彻底切断输入电源,使升压DC/DC变换器具备了输出短路保护功能。实验结果验证了该电路的正确性和可行性。
According to the inherent structure of a basic step-up DC/DC converter, the input power supply can't be cut off by turning off the main switch, so it doesn't have the output short-circuit protection function.An improved step-up DC/DC converter is presented by adding an isolated switch and a freewheeling diode to the input.When the output of the converter is short-circuited,the energy of the input power supply can be cut off by starting protection circuit and openning main switch.The results prove the correctness and feasibility of the circuit.
出处
《电力电子技术》
CSCD
北大核心
2009年第5期71-72,共2页
Power Electronics
关键词
变换器
电源/输出短路保护
converter
power supply/ output short-circuit protection