Intelligently controlled AC contact with voltage feedback

Abstract

This invention discloses one voltage feedback intelligent control alternating contactor, which comprises coil operation module, self-switching power part, central control module, drive and protective module and voltage protective test module. The process is the following: alternating power entering coil operation module after commutation through choppers to provide power to coil; the central control module receives voltage test module to test power voltage signals to control the output voltage occupancy; the drive circuit provides power part control impulse. By adopting super voltage feedback to match electrical magnetic iron and reverse characteristics to reduce iron core and touch probe spring. When the touch probe operates electrical iron and self adjusts chopper to make coil supply voltage to save energy.

Description

technical field [0001] The invention belongs to the field of intelligent low-voltage electrical appliances, and relates to an AC contactor, in particular to an intelligent control contactor with voltage feedback. Background technique [0002] AC contactor is a frequently operated control electrical appliance, which is operated by operating the electromagnet to drive the contact system. When the electromagnet is powered on, the electromagnet overcomes the reaction force composed of the contact spring and the reaction force spring, and the moving iron core drives the movable part mainly composed of the moving contact to move downward, firstly makes the moving and static contacts contact, and then passes through A period of overtravel, the moving and static iron cores are closed. The overtravel of the moving contact is to ensure that the moving contact can still be reliably contacted after the contact is worn out. It refers to the distance that the movi...

AI Technical Summary

Problems solved by technology

[0003] When the coil voltage of a traditional AC contactor is close to the electromagnet suction and release voltage, since the suction force at this time is very close to the corresponding reaction force under the corresponding working air gap, and the suction force of the AC electromagnet is pulsating, strong vibration will occur , affecting the reliable operation of the contactor

In addition, there are currently millions to tens of millions of contactors installed in industrial systems. Although each contactor consumes tens of watts of energy on average, the total number is huge. Therefore, the energy saving problem of contactors has long been concerned by people. a technical question

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