CN2404205Y

CN2404205Y - Low-power dissipation AC/DC contactor

Info

Publication number: CN2404205Y
Application number: CN 99228450
Authority: CN
Inventors: 王开来
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-05-21
Filing date: 1999-05-21
Publication date: 2000-11-01
Anticipated expiration: 2009-05-21

Abstract

The utility model relates to a new low power consumption AC/DC contactor with a mechanical locking buckle. When a main coil of the AC/DC contactor is instantly electrified, electromagnetic force enables a main contacting head to be communicated and locked by the mechanical locking buckle. When the electricity of the main coil is cut off, the sucking state of the contactor is still kept. The contactor can be restored to a disconnecting state by instantly electrifying an unlocking coil, and the mechanical locking buckle is unlocked to release the main contacting head to enable the contactor to be restored to the disconnecting state so that the contactor returns to a starting position. The unlocking function can also be realized by the method that a storage capacitor discharges electricity which is supplied to the unlocking coil. The utility model has the advantages of energy saving, silent running, no coil temperature rise, good contact performance of the main contacting head, long service life, etc.

Description

The low-power consumption AC/DC contactor

The utility model is to belong to the AC/DC contactor technical field.

Existing AC/DC contactor is made up of casing, electromagnet, coil, main contact and auxiliary contact, its working mechanism is: after energized, electromagnet produces electromagnetic force, main contact is connected, thereby made controlled system energising work.In order to keep main contact to connect for a long time, electromagnet must remain attracting state, so not only wastes electric energy, and can produce noise during work of electromagnet, and coil even can make coil burn out because the temperature of switching on all the time can raise to some extent.

The purpose of this utility model is exactly in order to overcome the above-mentioned shortcoming of existing in prior technology, proposes a kind of low-power consumption AC/DC contactor of novel band mechanical lock buckle.

Task of the present utility model is achieved in that when giving the moment energising of AC/DC contactor main coil, electromagnetic force is connected main contact, and main contact is locked by mechanical lock buckle, keep in touch the opening state of device, main coil outage meanwhile, so just realized that contactor need not keep the purpose that electromagnet coil power can be worked under opening state, also can not produce noise and temperature rise thus.For making contactor return to off-state, need only give trip coil moment energising, by release mechanism main noddle on contactor is broken away from, become off-state by closure.So just finished the folding of contactor---the once-through operation circulation of running jointly.For making contactor more safe and reliable, another additional design of the present utility model is when the external power supply sudden power, and its unlocking function is supplied with trip coil by the storage capacitor discharge, makes the mechanical lock buckle release, thereby makes contactor return to off-state.

The utility model is compared with existing AC/DC contactor, has energy-conservation, silent running, coil and does not have advantages such as temperature rise, main contact contact are good, long service life.

Accompanying drawing is the utility model low-power consumption AC/DC contactor electrical schematic diagram

Embodiment of the present utility model is described in further detail in conjunction with the accompanying drawings.

Shown in accompanying drawing: AC power AC is through button TA, button QA or normal opened contact QC ₂The back divides three the tunnel: the one tunnel through normally closed contact QC ₁, rectifier bridge D ₄After add to contactor main coil J ₁Two ends; The second the tunnel through rectifier bridge D ₃After respectively through resistance R ₂To a point, through capacitor C ₃To the c point, and add to contactor tripping coil J by the b point ₂Two ends; Third Road is through capacitor C ₁Add to the d point, the d point is through backward diode D ₁, resistance R ₁Connect zero-power line, the d point voltage is through diode D forward ₂Add to ancillary coil J ₃Two ends, and at J ₃The other capacitor C that connects in two ends ₂Here: normally closed contact QC ₁With normal opened contact QC ₂Circle J serves as theme ₁Normally closed, normal opened contact, 2 of b, c are ancillary coil J ₃Normally closed contact, 2 of a, c are ancillary coil J ₃Normal opened contact.Press button QA, electric current passes through QC ₁Normally closed contact, rectifier bridge D ₄J is given in the back ₁Coil send electricity, and the contactor adhesive also drives the pinning of mechanical lock buckle device in on-state; Meanwhile, J ₁Normally closed contact QC ₁Become and often open normal opened contact QC ₂Become normally closed, make J ₁Outage; Still keep wiring board to have on the other hand: to lead up to C ₁D is given in step-down ₁, D ₂And J ₃Coil makes J ₃Closed connection of 2 of normal opened contact a, c, 2 disconnections of b, c make other road voltage through rectifier bridge D ₃, resistance R ₂The back is to capacitor C ₃Charging, this moment, contactor still was an attracting state.When shutting down, press button TA, make wiring board outage (outer circuit have a power failure with press TA identical), J as need ₃Dead electricity, 2 disconnections of a, c, 2 connections of b, c, capacitor C ₃Discharge makes tripping coil J ₂Get the electronic release of doing, make contactor return to off-state, each respective contacts is all got back to original initial position.J ₁, J ₂Be moment energising (about 25～35 milliseconds), have only J ₃Long-time energising work, its power consumption only is 0.36W.

Claims

1. low-power consumption AC/DC contactor with mechanical lock buckle, it is characterized in that: supply voltage is through button TA, button QA or normal opened contact QC ₂The back divides three the tunnel, the one tunnel through normally closed contact QC ₁, rectifier bridge D ₄After add to contactor main coil J ₁Two ends; The second the tunnel through rectifier bridge D ₃After respectively through resistance R ₂To a point, through capacitor C ₃To the c point, and add to contactor tripping coil J by the b point ₂Two ends; Third Road adds to the d point through capacitor C 1, and the d point is through backward diode D ₁, resistance R ₁Connect zero-power line, the d point voltage is through diode D forward ₂Add to ancillary coil J ₃Two ends, and at J ₃The other capacitor C that connects in two ends ₂

2. low-power consumption AC/DC contactor according to claim 2 is characterized in that: QC ₁And QC ₂Be respectively J ₁Normally closed, the normal opened contact of coil; 2 of a, c are ancillary coil J ₃Normal opened contact, 2 of b, c are ancillary coil J ₃Normally closed contact.