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Anti-flashover intelligent AC contactor

An AC contactor, anti-shake technology, applied in relays, circuits, electrical components and other directions, can solve the problems of no locking device, complex circuit, high cost, improve life index, reasonable parameter design, reduce impact. Effect

Inactive Publication Date: 2009-03-25
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of locking head can only be used with specially designed special contactors, and the main contacts locked by the locking head need to be disconnected in the case of power failure. An independent power supply is required. For contactors greater than 170A, and There is no matching locking device
[0006] (4) Adopt dual power supply mode, high cost and complicated circuit

Method used

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] Such as figure 1 As shown, the present invention relates to an anti-sway intelligent AC contactor, including a high-power rectifier circuit D, a sampling circuit E, a dU / dt detection circuit Z, high-power switching tubes A, B, optocoupler isolators F, G, Switch tube T, energy storage V, flyback topology circuit StackFET TM , a high-frequency transformer S, a single-chip microcomputer system P, a communication module Q, a power supply U of an optocoupler device and a contactor body; it is characterized in that; the input terminals [1], [2] of the described high-power rectifier circuit D are connected to the power supply, The output ends are respectively connected in parallel with the sampling circuit E and the dU / dt detection circuit Z, the positive end of the dU / dt detection circuit Z is connected to the input end of the high-power switch tube...

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Abstract

The invention relates to an anti-interference electricity intelligent alternating current contactor including a high-power rectification circuit D, a sampling circuit E, a dU / dt detection circuit Z, high-power switch tubes A and B, optical coupler isolators F and G, a switch tube T, an accumulator, a fly-back topology circuit StackFET, a high-frequency transformer S, a single-chip system P, a communication module, a power supply U of optical couplers, and a contactor body. The invention has the functions that the anti-interference electricity intelligent alternating current contactor can self-keep at interference accidents and switch on and off normally when no interference accidents happen, and has an intelligent control module with wide voltage working range and interchangeable alternating current and direct current, thereby having the characteristics of small size, long service life, reliable work, communication, anti-interference and wide application.

Description

technical field [0001] The invention relates to the field of intelligent control of equipment, in particular to an anti-swaying intelligent AC contactor. Background technique [0002] The so-called "shock electricity" refers to the phenomenon that the voltage fluctuates greatly due to lightning strikes, short circuits, dual power supply switching, some transient faults and other reasons. The fluctuation range of the voltage is between zero voltage and the maximum voltage value. The voltage fluctuation time is very short, generally between 0.7 and 1 second. The above two points are the most important and basic characteristics of "Akira Electric". In actual production, due to "shaking electricity", the normal voltage value drops very low in an instant, which is less than the pull-in voltage (0.8Un) of the contactor coil, so that the main contact of the contactor is released, and the normally closed auxiliary contact Closed, the normally open auxiliary contact is disconnecte...

Claims

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Application Information

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IPC IPC(8): H01H47/00
Inventor 许志红
Owner FUZHOU UNIVERSITY
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