CN2351831Y

CN2351831Y - AC contactor without holding current

Info

Publication number: CN2351831Y
Application number: CN 98237581
Authority: CN
Inventors: 刘万生
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-05-12
Filing date: 1998-05-12
Publication date: 1999-12-01
Anticipated expiration: 2008-05-12

Abstract

The utility model relates to an AC contactor without holding current. The utility model comprises a base body and components arranged in the base body, such as auxiliary contacts, a main contact, a contact bridge, a coil, and two supporting springs which are connected with the contact bridge, wherein, a movable iron core is arranged in the coil; the top end of the movable iron core is connected with the contact bridge; a permanent magnetic block is arranged on a position of the base body bottom, corresponding to the lower end of the movable iron core. When DC start electric currents with different directions pass through the coil, the movable iron core moves to different directions and the permanent magnetic block (which drives the contact bridge) can keep the movable iron core in two position states, omitting continuous electrifying of the coil, and thus an aim is realized to avoid consuming the holding electric current.

Description

The A.C. contactor of no holding current

The utility model relates to a kind of electronic product, particularly a kind of A.C. contactor that does not have holding current.

Up to now, relay, A.C. contactor all are to produce magnetic field by electric current by coil, and pull-core drives the closing of contact.When quitting work, cut off electric current, magnetic field disappears, and iron core drives the contact separately at the effect of support spring home position next time.Therefore,, will consume holding current as long as be in the work running status, the waste electric energy, just with temperature rise and drone noise, also can correspondingly shorten useful life certainly.Since the sixties, both at home and abroad just the battery saving arrangement of relay, A.C. contactor a large amount of case studies and exploration have been carried out, the battery saving arrangement that various ways occurred, but holding current is reduced to some extent, all there is not this to the target that does not consume holding current.

Deficiency at above-mentioned prior art existence, the purpose of this utility model provides a kind of A.C. contactor that does not have holding current, promptly when the work of relay, A.C. contactor, do not consume holding current, thereby realize thoroughly energy-conservation target, and do not have temperature rise, noiseless, increase the service life.

The purpose of this utility model is to realize like this; It comprises matrix and place auxiliary contact, main contacts in the matrix, touch bridge, coil and with touch two support springs that bridge links to each other, it is characterized in that: be provided with a movable core in the coil, the upper end of this iron core with touch bridge and link to each other, the corresponding section, lower end of bottom in matrix and movable core is provided with a permanent magnet.When coil passed through the direct current starting current of different directions, movable core moved to different directions, kept iron core (bridge is touched in drive) by permanent magnet and was in two kinds of location statuss, and coil needn't continue energising, thereby realized not consuming holding current.

The utility model has the advantages that: when contactor is in running order, do not consume holding current, thereby improve energy-saving effect greatly, and do not have temperature rise, noiseless, help prolonging the useful life of contactor.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is that the utility model is used electrical schematic diagram.

By accompanying drawing as can be known, the utility model mainly comprises the auxiliary contact 1, the main contacts 2 that place in the matrix 9, touches bridge 3, support spring 6, coil 7, movable core 5 and permanent magnet 8, it and existing A.C. contactor (relay) structure are basic identical, its difference mainly is two " E " sections cores of past to be changed into penetrate single vertical bar iron core in the coil (this iron core adopts the soft magnetic material of high permeability), and correspondingly with it is connected in permanent magnet 8 on the matrix base being provided with one below this iron core.The upper end of movable core 5 with touch bridge 3 usefulness pins 4 and be connected, two support springs 6 (only can see among the figure) place and touch between bridge 3 and the matrix base.During application, the power end of coil 7 connects rectifier diode D1, the D2 of two reverse parallel connections, and starting and stopping button QA, TA are in series with diode D1, D2 respectively.When pressing starting button QA, the direct current that passes through in the coil 7 makes core field identical with the permanent magnet field direction, iron core 5 is pulled to permanent magnet 8 and contacts, touch bridge 3 and driven, make main contacts 2 adhesives, unclamp starting button QA this moment by iron core 5, promptly cut off electric current, permanent magnet still can hold iron core, guarantees to touch the position that bridge is in the main contacts adhesive, has so just realized not consuming holding current.When pressing when quitting work button TA, the reverse dc that passes through in the coil 7, make core field opposite with the permanent magnet field direction, iron core is pushed open by permanent magnet, cut off electric current this moment, the iron core that leaves permanent magnet still can keep touching bridge and be in the position that main contacts disconnects under the effect of two support springs.

Claims

1, a kind of A.C. contactor that does not have holding current, it comprise matrix and place auxiliary contact, main contacts in the matrix, touch bridge, coil and with touch two support springs that bridge links to each other, it is characterized in that: be provided with a movable core in the coil, the upper end of this iron core with touch bridge and link to each other, the corresponding section, lower end of bottom in matrix and movable core is provided with a permanent magnet.