同时采用软启动电路防止浪涌电流，保护功率开关管。
To protect power switches, soft-starting circuit was designed to overcome the surge current.
实践证明：按照上述原则设计的回路可用于对避雷器阀片、压敏电阻及浪涌保护器SPD进行冲击电流检测。
The fact shows that the designed circuits can be used in impulse current test for arrestors, varistors and SPD.
对功率因数校正器辅助电路中的滤波电路设计、起动电流抑制电路的设计和开关的浪涌吸收保护电路的设计进行了分析。
The design of the filter circuit, starting current check circuit and switching surge absorption-protection circuit in an auxiliary circuit of PFC is analyzed.
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