Anti-surge circuit

Abstract

The invention discloses an anti-surge circuit comprising a high-power resistor R1, an MOS tube Q1, a resistor R2, a resistor R3, a resistor R4, a voltage-regulator tube ZD1, a capacitor C1, an electrolytic capacitor EC1, a capacitor C3, a capacitor C2, a bridge pile BD1, and a fuse F1. The anti-surge circuit is characterized in that one end of the capacitor C1 is connected with the positive electrode of the electrolytic capacitor EC1, one end of the resistor R4 and the positive electrode of the bridge pile BD1; the other end of the capacitor C1, the negative electrode of the electrolytic capacitor EC1, the drain of the MOS tube Q1 and one end of the resistor R1 are grounded; the other end of the resistor R1 is connected with the negative electrode of the bridge pile BD1, the source of the MOS tube Q1, one end of the capacitor C2, the anode of the voltage-regulator tube ZD1, one end of the capacitor C3 and one end of the resistor R3; the other end of the capacitor C2 is connected with the gate of the MOS tube Q1, the cathode of the voltage-regulator tube ZD1 and one end of the resistor R2; and the other end of the resistor R2 is connected with the other end of the resistor R4, the other end of the resistor R3 and the other end of the capacitor C3. The surge current can be suppressed for both fast switching on / off and heat engine switching on / off, and therefore, the impact of electronic products to the power grid is reduced greatly.

Description

technical field [0001] The invention relates to the field of circuits, in particular to an anti-surge circuit. Background technique [0002] The frequently used NTC surge current suppression circuit is widely used due to its simplicity, and its circuit structure is as follows: figure 1 As shown, but due to its power consumption and thermal engine's non-suppressive surge effect, the effect is not ideal in many applications. As current electronic products have higher and higher requirements for inrush current, circuits with this structure can no longer meet the requirements. Contents of the invention [0003] The present invention aims to solve the above-mentioned problems existing in the prior art, and aims to provide an improved anti-surge circuit, which can not only reduce the surge current more effectively, greatly reduce the impact on the power grid, but also have low power consumption and There will be no heat engine and no surge suppression effect. [0004] In orde...

AI Technical Summary

Problems solved by technology

[0002] The frequently used NTC surge current suppression circuit is widely used due to its simplicity, and its circuit structure is as follows: figure 1 As shown, but due to its power consumption and the lack of suppression surge effect of the thermal engine, the effect is not ideal in many applications

As current electronic products have higher and higher requirements for inrush current, circuits with this structure can no longer meet the requirements.

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