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Capacitor grounding

Views: 0     Author: Site Editor     Publish Time: 2019-10-15      Origin: Site

Capacitor grounding is generally a filtering effect. For example, electrolytic capacitors can filter low frequencies, and ceramic capacitors can filter high frequencies. The principle is the impedance of the capacitor. The capacitance is on the AC signal path. The higher the signal frequency, the smaller the impedance, the larger the capacitance, the smaller the impedance, and the DC signal is broken. For example, the positive and negative poles of the DC power supply are connected to a capacitor, which is equivalent to a short circuit to the AC signal, so the ripple signal is consumed by the capacitor, so the voltage is more stable. Similarly, if a capacitor is connected to the digital ground, then the fluctuation The signal will be shorted to ground through it and flow into the ground without flowing into another level of circuitry. Electricity is like a human being, and it chooses the path that is easy to pass. The capacitor is equal to the path for the AC signal, and it naturally chooses the capacitor to pass.

 

Why should the capacitor be grounded? Grounding the capacitor In order to ensure that the ground potential is zero, in practical problems, this is for the protection of the electrical and personal protection. Grounding the capacitor does not necessarily complicate the problem, because the capacitor does not necessarily have a change in charge when it is grounded. This must be understood. A live capacitor, grounded at one end, has no effect on the charge on the plates.

 

There is a reason for the capacitor to be grounded. The capacitor will be charged and discharged. The grounding can also be a discharge process. Keep the capacitor at zero potential at one end, so that the capacitor capacity is excellent.


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