CN86205252U - Power-saving magnetic contactor - Google Patents

Abstract

The utility model relates to a power-saving contactor which is characterized in that the magnetic yoke part of the contactor is composed of a large and a small two iron cores for silicon steel sheets, a permanent magnet made of neodymium-iron-boron materials and arranged between the two iron cores, a brass side plate and an air gap between the iron cores, and the permanent magnet has small size and large attracting force. The turn number of the excitation and the demagnetization coils is less than that of the general contactor, so the utility model has large exciting current, smooth attracting force, reliable attraction of the permanent magnet, strong demagnetization force, stable and reliable work and good mechanical performance.

Description

Power-saving magnetic contactor

The utility model belongs to a kind of power distribution equipment of electric power system, is a kind of improvement invention to contactor.

The widely used contactor of current power system, power consumption is bigger.Occur a kind of " CJ12 series permanent magnetism keeps the electricity-saving type A.C. contactor " in recent years again, its design feature is: the yoke part is made up of iron core, pole shoe, short-circuiting device, permanent magnet and side plate.Though this contactor can economize on electricity, yoke part-structure complexity, air gap adjustment trouble.Particularly magnetic attraction is little, and useful flux disperses, reliable and stable sexual satisfaction not real work need, be difficult to produce.

The objective of the invention is to develop a kind of simple in structure, easy to adjust, reliable and stable, contactor that magnetic attraction is big.

The characteristics of contactor of the present invention are that yoke partly comprises permanent magnet and the air gap between two iron cores of size, side plate and two iron cores.End at big iron core is equipped with excitatory, degaussion coil.Wherein iron core is made by silicon steel sheet, and permanent magnet is to be made by NdFeB material, has characteristics such as suction is big, volume is little, and the length of permanent magnet is the 20-24 millimeter, widely is 14-17 millimeter, thick in the 2-3 millimeter.Side plate brass material has shock-resistant and the effect of minimizing leakage field.Width of air gap can be the 1.0-1.5 millimeter, enters the available epoxy sealing for preventing foreign material.The flow direction of magnetizing coil is consistent with the flow direction of permanent magnet, and the degaussion coil flow direction is then opposite.Magnetizing coil is 0.31 millimeter in 2500-3000 circle, line footpath, and degaussion coil is 0.09 millimeter in 2200-2500 circle, line footpath.

Fig. 1 is the magnetic yoke structure schematic diagram of contactor;

Fig. 2 is the assembling schematic diagram of contactor yoke;

1 is big iron core among the figure, and 2 is little iron core, and 3 is permanent magnet, and 4 is side plate, and 5 is air gap.

Fig. 3 is contactor control circuit figure.

6 is the decompression control box among the figure, and 7 is magnetizing coil, and 8 is degaussion coil.QA is a start button, and TA is a stop button, decompression control box output dc voltage.Press QA, magnetizing coil work, the armature adhesive is behind the contacting, by permanent magnet suction holding contact closure.Press TA, degaussion coil work, armature discharges, and the contact disconnects.

The permanent magnet of this contactor has adopted NdFeB material, has changed the number of turn excitatory, degaussion coil, does permanent magnet relatively with adopting aluminium nickel cobalt titanium eight class magnetic steel materials, and have the following advantages: the yoke partial structure is simple, easy to adjust. The permanent magnet volume reduces 2/3rds, and suction improves the 3-5 kilogram, and the functional parts of demagnetizing curve is straight line substantially, stabilization of operating point; Excitatory, the corresponding minimizing of the degaussion coil number of turn, exciting curent increases, and the assurance contactor is reliablely and stablely worked, and impulsive force is little.

With above-mentioned design yoke and the solenoid of CJ12-100 electromagnetic lock button A.C. contactor are reequiped. Adopt the permanent magnet of 22 * 16 * 3 millimeters NdFeB material, air gap is 1.2 millimeters. Magnetizing coil is 3000 circles, 0.31 millimeter of wire diameter. Degaussion coil is 2500 circles, 0.09 millimeter of wire diameter, when excitatory adhesive steady, it is reliable that permanent magnet keeps, demagnetization force is stronger, can save electricity, through calculating per 1,000,000 annual electricity of saving Be worth 640,000 yuan. This contactor after testing department carries out type approval test, and indices is requirement up to specification all.

Claims (6)

1, a kind of contactor of being made up of yoke, armature, solenoid, contact is characterized in that yoke partly comprises permanent magnet [3], air gap [5], the side plate [4] between iron core [1,2], iron core [1,2]; At big iron core [1] one end magnetizing coil [7] and degaussion coil [8] are housed.

2,, it is characterized in that permanent magnet (3) is to be made by NdFeB material according to the described contactor of claim 1.

3,, it is characterized in that the length and width of permanent magnet (3), the thick 20-24 of being respectively millimeter, 14-17 millimeter, 2-3 millimeter according to claim 1,2 described contactors.

4,, it is characterized in that air gap (5) width can be the 1.0-1.5 millimeter according to the described contactor of claim 1.

5,, it is characterized in that side plate (4) is the brass material according to the described contactor of claim 1.

6, according to the described contactor of claim 1, it is characterized in that magnetizing coil (7) is the 2500-3000 circle, line directly is 0.31 millimeter, and degaussion coil (8) is the 2200-2500 circle, and line directly is 0.09 millimeter.

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