摘要
对Buck DC-DC变换器电感开路的最危险情况进行了分析,提出了一个全新的分析方法——等效电阻法,将Buck DC-DC变换器电感开路的放电特性等效为一个简单电感电路,推导了等效电阻的表达式;以感性电路的最小点燃曲线作为判断依据,得到了本质安全型Buck DC-DC变换器内部本质安全性的判断方法,并用实验验证了所提方法的合理性和判据的正确性。
The most dangerous case of disconnecting inductor of a Buck DC-DC converter is analyzed deeply. The equivalent-resistance analysis method is proposed which equal the inductor-disconnected discharged behavior of Buck converters to an equivalently simple inductive circuit. The formula of equivalent-resistance is deduced. Based on this method, the inner intrinsic safety of the Buck converter is determined by comparing the equivalent-current of the inductor of the converter with the minimum ignition current. The experimental results are given to verify the validity of the criterion and feasibility of the method.
出处
《科学技术与工程》
2010年第11期2632-2635,共4页
Science Technology and Engineering
