Views: 0 Author: Site Editor Publish Time: 2019-10-31 Origin: Site
When the safety capacitors fail, they will not cause electric shock and will not cause injury. We often see a Y capacitor in the switching power supply, which mainly eliminates noise and suppresses electromagnetic interference. Two Y capacitors are used in the switching power supply, which are between DC 300V and low voltage ground and between high voltage low and low voltage ground. What is the principle?
The function of the Y capacitor is anti-interference, the grounding of each part of the circuit is connected, and the anti-interference performance is good. However, the ground on both sides of the parallel switching power supply is not connected. In order to improve the anti-jamming performance, a compromise is adopted, that is, the two grounds are connected by a small-capacity capacitor and a large-resistance resistor. Everyone should learn to defend the true and false when purchasing safety capacitors, and avoid purchasing inferior capacitors, which will cause damage to the switched capacitor products.
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