Filtering voltage-stabilizing control circuit and system

Abstract

According to the filtering voltage-stabilizing control circuit and system provided by the invention, the time-delay relay is additionally arranged in the filtering voltage-stabilizing circuit in the prior art, the disconnection and connection of the static contact and the movable contact are controlled through the delay time of the time-delay relay, and after the time-delay relay is electrified, when the delay time is not reached, the static contact and the movable contact are switched off; the static contact of the time-delay relay and the movable contact of the time-delay relay are in a disconnected state, and the power supply charges the filter capacitor through the current-limiting resistor; when the delay time is up, the static contact of the delay relay is connected with the movable contact of the delay relay, the current-limiting resistor is short-circuited, and the filter capacitor is directly connected with the power supply, so that the problem of impact current when the filter capacitor in the filter voltage stabilizing circuit is initially electrified can be solved; and the problems of power loss and limitation on discharge current of the capacitor caused by access of the current-limiting resistor can be solved, so that the power supply efficiency and the voltage stabilization effect are improved.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a filter and voltage stabilization control circuit and system. Background technique [0002] The filter voltage stabilization circuit is connected in parallel at the output end of the rectifier power supply circuit to reduce the ripple coefficient of the AC pulsation and smooth the DC output. Usually, an electrolytic capacitor with a large capacitance is selected as the main component of the circuit. In the electronic circuit that converts AC to DC power supply, the filter voltage stabilization circuit not only makes the DC output of the power supply smooth and stable, reduces the influence of the alternating pulsating current on the electronic circuit, but also absorbs the current fluctuation generated during the working process of the electronic circuit And the interference that comes in through the AC power supply makes the working performance of the electronic circuit mor...

AI Technical Summary

Problems solved by technology

[0004] However, the method adopted by the above-mentioned filter voltage stabilization circuit has the following problems: the current limiting resistor R in the filter voltage stabilization circuit can effectively limit the inrush current during the charging process of the capacitor, but after the initial charging of the capacitor is completed, the current limiting resistor R is always Connecting to the circuit will generate additional power consumption and limit the discharge current of the capacitor, which will affect the effect of voltage regulation

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