Intelligent electricity-saving device of AC/DC contactor

Abstract

The invention relates to an intelligent electricity-saving device of AC / DC contactor, comprising a microprocessor (1), an AC / DC switching circuit (2), a low-power consumption holding circuit (3), a high / low voltage switching circuit (4), an output circuit (5), a switch change-over circuit (6), a first isolating circuit (7), a voltage detection circuit (8), a second isolating circuit (9), a power factor calibration circuit (10) and a surge suppression power-supply filter circuit (11). The intelligent electricity-saving device AC / DC contactor in the invention can greatly prolong the service life of the contactor, lower energy consumption and reduce noise.

Description

(1) Technical field [0001] The invention relates to a power saver, in particular to an AC / DC contactor intelligent power saver, which belongs to the technical field of electrical appliance control. (2) Background technology [0002] At present, common contactors on the market are generally powered by direct access to alternating current. This type of contactor has the following shortcomings: [0003] (1) Poor reliability and short service life: Due to the direct power supply of alternating current, the contactor is often sucked tightly, sometimes loosened or even not sucked due to unstable grid voltage. Great arcing and damage will even increase the probability of burning the contactor wire package, thus greatly shortening the service life of the contactor. [0004] (2) High energy consumption: Because the contactor relies on the AC current to generate a magnetic field through the wire package to pull in, the alternating current will generate an induced current in the clos...

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Problems solved by technology

[0003] (1) Poor reliability and short service life: Due to the direct power supply of alternating current, the contactor often sucks tightly, sometimes sucks loose or even does not suck due to the instability of the grid voltage. Great arcing and damage will even increase the probability of burning the contactor wire package, thus greatly shortening the service life of the contactor

[0004] (2) High energy consumption: Since the contactor is attracted by the magnetic field generated by the alternating current through the wire package, the alternating current will generate an induced current in the closed circuit, that is, eddy current, and the eddy current will cause eddy current loss when heating in the wire package, which will not only greatly It consumes electric energy, and the high temperature will greatly reduce the service life of the contactor wire pack

[0005] (3) Loud noise: when the alternating current passes through the line package, it will produce humming alternating sound, forming noise pollution

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