Why is there an inrush current when the capacitor is put in? |Focus on mid-to-high-end brand capacitor manufacturers

The capacitor itself is a component that can hold electric charge. There will be a charging and discharging process at the moment the capacitor is connected to the circuit. During this process, it is equivalent to adding an electric load or power generation facility to the circuit. Although the time is very short, The resulting current impact is not small. Zero-crossing input is input when the voltage is zero. Because the voltage is zero at this time, the process of charging and discharging will not occur at the moment of input, so there is no inrush current. During zero-crossing removal, the instantaneous voltage at both ends of the capacitor is zero, and there is no charge storage in the cut-out capacitor, and there is no need for discharge treatment when it is connected next time. It can be seen from the above that even if the zero crossing is connected, the capacitor itself will be charged, which will cause inrush current.

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