crowbar,电撬的产生及其影响???

CROWBAR(in DC-DC CONVERTER)
An overvoltage protection circuit which monitors the
output voltage of a power supply and rapidly creates
a low resistance path across the output when a
predetermined voltage is exceeded.过压保护电路,监测输出电压,当输出电压超过标称值的时候迅速在输出端产生一个低阻抗通路;

The DM filter natural frequency should not be set
inside the control loop band width of the power
supply to avoid instability. This is because the output
filter appears to the power supply as a series resonant
circuit and will act as a crowbar on the output at
its natural frequency.为什么输出滤波器在自然频率时候相对于电源来说是个电撬???

输出LC发生串连谐振的时候,对电源来说是个“电撬”,所以差模滤波器的谐振频率不能落到控制环路之内??

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More, please!