电源模块抗浪涌干扰整改实例
A Modified Case of Power Supply against Surge
摘要 通过开关电源模块抗浪涌干扰整改案例,分析得出电源板在浪涌冲击试验时出现故障的主要原因是存在过电压保护电路和PFC 电路设计缺陷,并提出了增加控制电路抗干扰性的改进设计方案。整改后,再次进行浪涌注入试验,设备不再重启。
关键词 浪涌;电源模块;过压保护;控制电路
Abstract Based on a practical case of modifying the switching power supply module to
prevent from the disturbance of surge,the main reasons of failure during the surge test
for the power panel,which are the defects on the design of over-voltage protection and
PFC circuit, are analyzed. The improving design proposal for enhancing the surge
immunity is put forward as well. Finally, the modified equipment could not restart any
more during the surge test.
Keywords surge;power supply module;over-voltage protection;control circuit
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