CN2485779Y

CN2485779Y - Magnetic contactor

Info

Publication number: CN2485779Y
Application number: CN01230931U
Authority: CN
Inventors: 刘俊堂
Original assignee: GUIZHOU TIANYI ELECTRICAL CO Ltd
Current assignee: GUIZHOU TIANYI ELECTRICAL CO Ltd
Priority date: 2001-06-29
Filing date: 2001-06-29
Publication date: 2002-04-10
Anticipated expiration: 2011-06-29

Abstract

The utility model relates to a magnetic contactor. Two states of a contact, comprising open and shut are held by the same pair of permanent magnets. Loop has no need to be communicated with electricity. When exchange of the state of the contact is needed, just presents a pulse of DC voltage and the exchange is to be completed, the polarity of the pressure determines the state of the contact which can also be controlled by power supply with two electrical sources respectively, one source is used for the shut of the contact and the other for the open. The contactor is characterized in that the solenoid magnet is adopted, having predominance in the usage of high-power contactor. At the same time, the permanent magnet circuit is always shut under the two states of the contact, the magnetism transmitting amount is large, the suction is high, the capacity to resist libration and impact is strong. Interference from other magnetic field is little. The contactor applies to constant electricity, remote control electricity and a plurality of other lash-up electric systems.

Description

Magnetic latching contactor

The utility model proposes a kind of reliability height, structure advanced person's magnetic latching contactor is widely used in communication power supply, uninterrupted power supply and various emergency power system.

Existing magnetic latching contactor (relay) electromagnet has two kinds of forms, a kind ofly adopts ancient clapper-type, is not suitable for making high-power contactor, and another kind has adopted helix tube type (suction-type), has made full use of screwed pipe suction.The utility model proposes a kind of new construction of solenoid electromagnet, magnetic circuit is more reasonable, no matter the contact is in closure or off-state, the permanent magnet magnetic flux all is equivalent to short circuit, and whole magnetic circuit magnetic resistance is little, and suction is big, contact force is big, in stable condition, anti-vibration and impact capacity are strong, and the magnetic property decay is slow.

As Fig. 1, the utility model comprises electromagnet system (1～5,14～17) and contact system (6～11).Electromagnet system comprises two coils (1,4), and two coils can directly be connected, and makes contactor finish closure or disconnection action by rightabout pulsed field magnetization electric current; Or two coil promote blood circulation respectively towards exciting current, a coil makes the closing of contact, another coil disconnects the contact.Permanent magnet 3 is between two coils, and its shape can be two square or two semicircles, and symmetry is placed, and polarity (N to N or S to S) relatively, also can be an annular permanent magnnet, and Internal and external cycle is respectively the two poles of the earth.One back-up block 16 places between the permanent magnet 3, also can not want back-up block.One moving core 15 is enclosed in the middle of coil (1,4) and the permanent magnet 3, the contact system (6～11) of the contactor of ining succession on it.The remaining parts of electromagnet system (1～5,14～17) comprises iron yoke 2, seat board 5, goes up magnetic pole 14, lower magnetic pole 17 etc., and these parts have constituted the magnetic circuit of coil and permanent magnet.Contact system (6～11) adopts double break point form, is fit to the big electric current of break-make, mainly comprises: 10, one touch springs 11 of 9, one calottes of 8, two moving contacts of 7, two fixed contacts of 6, two binding posts of a seat board.13 is mounting panel, uses for user installation.

Fig. 1 is the contact off-state, and Fig. 2 is a contact closure condition, the N, the S utmost point that supposes permanent magnet as depicted in figs. 1 and 2 (actual conditions also can with figure in opposite).Off-state at Fig. 1, the magnetic flux that permanent magnet 3 produces is by the N utmost point → back-up block 16 → movable core 15 → upward magnetic pole 14 → seat board 5 → iron yoke 2 → S utmost point forms closed magnetic circuit, the magnetic flux that movable core 15 is produced by permanent magnet 3 tightly is adsorbed on the magnetic pole 14, do not have air-gap in the magnetic circuit this moment, therefore magnetic flux is big, the suction that produces is big, and contacts of contactor is in stable open mode.

If promote blood circulation towards direct current (tens of milliseconds were to one second) to coil, coil produces magnetic flux, its direction is determined by sense of current, suppose that flow direction is: last magnetic pole 14 → iron core 15 → air-gap → lower magnetic pole 17 → iron yoke 2 → seat board 5 → last magnetic pole 14, between last magnetic pole 14 and unshakable in one's determination 15, the direction of coil flux and permanent magnet magnetic flux is opposite, will be fully or major part balance out, make the suction disappearance of 14 pairs of iron cores 15 of magnetic pole or weaken, simultaneously, because coil flux can produce downward suction to iron core through air-gap, unshakable in one's determination 15 move downward, driving moving contact system (preface 9 etc.) moves downward, the closing of contact has been finished by the conversion of reaching the pass, as Fig. 2.The magnetic flux that permanent magnet 3 produces forms closed magnetic circuit by the N utmost point → back-up block 16 → movable core 15 → lower magnetic pole 17 → iron yoke 2 → S utmost point, the magnetic flux that movable core 15 is produced by permanent magnet 3 tightly is adsorbed on the lower magnetic pole 17, equally, do not have air-gap in the magnetic circuit this moment, therefore magnetic flux is big, the suction that produces is big, and contacts of contactor is in stable closure state, and coil need not switched on.

Contactor to be converted to the off-state of Fig. 1 by the closure state of Fig. 2, only need to change the direction of above-mentioned coil current, unshakable in one's determination 15 with lower magnetic pole 17 between the formation magnetic flux opposite with the permanent magnet magnetic flux, the two complete or most of counteracting, between iron core 15 and last magnetic pole 14, form suction simultaneously, iron core will move upward, and drive the moving contact system and move upward, and finish the disconnection process.No matter be the open mode of Fig. 1 or the closed condition of Fig. 2, the magnetic circuit of permanent magnet all is independent closed, the material of magnetic flux process all is good permeability magnetic material, magnetic resistance is very little, the leakage flux of dispersing is less, be not subject to the interference in external magnetic field, the magnetic property decay is slower, and contactor has advantages of higher stability and reliability.

The material of above-mentioned magnetic flux process, iron yoke 2, last magnetic pole 14, iron core 15, lower magnetic pole 17, seat board 5, back-up block 16 are good permeability magnetic material, generally with electrical pure iron or No. 10 steel.Permanent magnet 3 preferably adopts maximum magnetic energy product height, cheap permanent magnetic material, and the at present existing many manufacturer production of this class material if adopt the lower permanent magnetic material of maximum magnetic energy product, then should increase the volume of permanent magnet, to guarantee certain magnetic energy product.The number of turn of two coils, line footpath, around to can be identical, also can be different, can connect (this moment around to must be identical), the polar switching of pulse voltage can have the double-point double-throw switch of meta or relay to realize with one, also can be realized by microcomputer; Also can carry out control respectively to two coils with the two-way power supply, such as, coil 1 is used to control the contact to be opened, and coil 4 is used to control the closing of contact.

Claims

1. a magnetic latching contactor is characterized in that: comprise electromagnet system (1～5,14～17) and contact system (6～11); Electromagnet system comprises: two coils (1,4), the use of also can switching on respectively of can connecting; Permanent magnet 3 between two coils, can be two blocks of square or semicircle permanent magnets that symmetry is placed, and polarity (N to N or S to S) relatively, also can be an annular permanent magnnet, and Internal and external cycle is respectively the two poles of the earth; One back-up block 16 places between the permanent magnet 3, also can not want back-up block; One moving core 15 is enclosed in the middle of coil and the permanent magnet, the contact system (6～11) of the contactor of ining succession on it; The remaining parts of electromagnet system (1～5,14～17) comprises iron yoke 2, seat board 5, goes up magnetic pole 14, lower magnetic pole 17 etc., and these parts have constituted the magnetic circuit of coil and permanent magnet.Contact system (6～11) mainly comprises: 10, one touch springs 11 of 9, one calottes of 8, two moving contacts of 7, two fixed contacts of 6, two binding posts of a seat board.

2. magnetic latching contactor according to claim 1, it is characterized in that: two coils (1, permanent magnet 3 and back-up block 16 are arranged 4), movable core 15 is during near last magnetic pole 14, the contact is in off-state, the magnetic flux of permanent magnet 3 generations this moment is by the N utmost point → back-up block 16 → movable core 15 → upward magnetic pole 14 → seat board 5 → iron yoke 2 → S utmost point forms closed magnetic circuit, and the magnetic flux that movable core 15 is produced by permanent magnet 3 tightly is adsorbed on the magnetic pole 14, keeps in touch the off-state of device contact; Movable core 15 is during near lower magnetic pole 17, and the contact is in closure state, and the magnetic flux that permanent magnet 3 produces forms closed magnetic circuit by the N utmost point → back-up block 16 → movable core 15 → lower magnetic pole 17 → iron yoke 2 → S utmost point, keeps in touch the closure state of device contact.