开关电源类负载在冲击状况下的建模研究

Modeling Study of Switching Mode Power Supply Under Lighting Surge

在建筑物内的雷电防护中,研究冲击状况下负载对楼宇内的暂态分析具有十分重要的意义。这里选择了楼宇内常用的开关电源类负载,研究了其在冲击状况下的建模。以日光灯镇流器所使用的开关电源为例,研究了开关电源的电磁干扰(EMI)滤波部分、整流部分及电流逆变部分的建模。通过使用集中参数和非线性拟合相结合的方法,得到了冲击情况下开关电源模型,并通过实验验证了模型的正确性。

Responses of switching mode power supply for appliances such as fluorescent lighting under a lighting surge is discussed.The circuitry of switching mode power supply for electronic ballast is examined, and surge models of the device is developed by taking into account both nonlinearity and parasitic effect of some components.The models are verified experimentally by comparing surge current in the switching mode power supply under applied voltage surge.