Most switches have a standby power circuit, switching power supply in standby mode still oscillating, but the frequency of normal working hours than lower.
大多数开关电源有待机电路，在待机状态开关电源还在振荡，只是频率比正常工作时要低。
In order to keep the normal operating state of a electro motor, the working frequency of the electro motor should be much lower than that of natural frequency.
为防止共振发生，电动机的工作频率应远远小于其固有频率。
If the working-frequency discharging voltage value exceed normal range, can faintly adjust the discharge gap.
如果工频放电电压值超出范围，可对间隙进行微调。
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