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新的军标对电源模块EMC测试影响

Source: Time:2020-06-22 08:27:51 views:

在电源模块必测项目CE102中,对限值进行了修改,明确了针对EUT电源电压低于28v、高于440V的限值,补充了针对270V电源的限值,并给出了电源电压在28—440 V时限值的计算公式,见标准图1。增加工作电流大于100 A时的替代测试方法,见标准附录B。校验时,只在10 kHz和100 kHz用示波器测量信号的有效值,而在2 MHz和10 MHz时直接用信号发生器的输出读数,不再用示波器测量。REl01适用范围有修改,取消了EUT距离天线50 cm的限值。陆军限值的起点由25 Hz时的180 dBpT改为182 dBpT,限值曲线的斜率按1/n规律衰减。海军限值曲线的形状和拐点都发生了改变,GJB151B的限值比GJB 151A的限值放松了2 dB至40 dB不等,见本文图12。

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