CN202183338U

CN202183338U - Permanent magnet contact

Info

Publication number: CN202183338U
Application number: CN2011203012587U
Authority: CN
Inventors: 王小燕; 申昌国; 李郓濮; 卫守龙
Original assignee: Keen Electric (shanghai) Co Ltd
Current assignee: Keen Electric (shanghai) Co Ltd
Priority date: 2011-08-18
Filing date: 2011-08-18
Publication date: 2012-04-04
Anticipated expiration: 2021-08-18

Abstract

The utility model provides a permanent magnet contact which is used for controlling the on and off of a power supply of a low-voltage power grid, and comprises a shell and a base, as well as a metal contact piece, a moving shaft bracket, an iron core, a switching-on driving coil, a switching-off driving coil and a permanent magnet which are arranged in the shell, wherein the metal contact piece and the permanent magnet are respectively fixed at two sides of the moving shaft bracket; the iron core is arranged on the base; the coil is wound on the iron core; an elastomer is arranged between the moving shaft bracket and the iron core; the shell is further provided with a metal connecting end which corresponds to the metal contact piece; the iron core generates magnetic field to absorb the permanent magnet and the iron core through one-time power on, the contactor keeps the switching-off state by the permanent magnet after power off, and the coil does not need to consume electricity, so that the social benefits and the economic benefits are obvious.

Description

Permanent magnet contactor

Technical field

A kind of electric equipment that is applied in the low-voltage power electrical network, particularly a kind of permanent magnet contactor in order to on/off in the control low voltage electric network.

Background technology

National grid and the employed contactor equipment of factory of enterprise mainly comprise moving iron core, static iron core, coil at present; Moving contact and fixed contact, coil are wrapped on the static iron core, and moving contact is fixed on the moving iron core, and moving iron core and static iron core are corresponding to be installed; Produce magnetic through static iron core behind the coil electricity, will move iron core and be adsorbed onto on the static iron core, moving contact is connected with fixed contact; Power turn-on, after the outage, static iron core loses magnetism fixed contact and moving contact is separated; Accomplish the supply and the cut-out of device power supply (DPS) in the low voltage electric network with this, because contactor coil is wanted continual power supply when adhesive, therefore very power consumption of this equipment; The small-sized contactor of a common 20A will consume the electric energy about 9-12W, and the contactor of a 60A then will consume the electric energy of 25-30W, can be described as a kind of high-energy equipment; In order to alleviate the supply of electric power burden, energy savings, a kind of energy-saving contactor of high reliability becomes to be badly in need of with electric unit.

The utility model content

In order to overcome the deficiency of prior art, this product adopts brand-new design, makes power consumption, volume, the stability of product all obtain revolutionary improvement, satisfies the permanent magnet contactor of industry user demand fully.

A kind of permanent magnet contactor comprises shell and base, and in the enclosure Metal Contact sheet, motion pedestal, iron core, coil and permanent magnet are set; It is characterized in that Metal Contact sheet and permanent magnet are separately fixed at the both sides of motion pedestal, iron core is located on the base; Coil is wrapped on the iron core; Be provided with elastomer between motion pedestal and iron core, also be provided with the metal connection end on the said housing, the corresponding setting of metal connection end with the Metal Contact sheet.

Said coil comprises combined floodgate drive coil and separating brake drive coil.

Said permanent magnet is strong magnetic neodymium iron boron.

The utility model utilizes the drive coil energising; Making iron core produce magnetic field adsorbs permanent magnet; Drive Metal Contact sheet and the energising of metal connection end in contact on the motion frame; Iron core produces magnetic field opposite when closed when giving the energising of separating brake drive coil, and permanent magnet separates with iron core under the effect of elastomeric restoring force, drives the Metal Contact sheet and separates with the metal connection end and reach the purpose that opens circuit.

The technical solution that the utility model provided is: adopt permanent-magnet structure to replace the traditional silicon steel sheet electromagnetic structure, and the control circuit of inner integrated special use, the outside is equipped with the housing and the common-use size mount pad of special manufacturing.

The beneficial effect of the utility model is: this product reliability is high, and is safe in utilization and since only when action drive coil just pass to electric current, so power consumption is minimum, can ignore.

A.C. contactor with a 60A traditional structure is an example, and its adhesive keeps power about 25-30W, owing to when closure, will continue to coil power supply; Consume kilowatt-hour about 33 hours in adhesive; The annual 265 degree electricity that consume are pressed the average electricity price for industrial uses of peak valley and are calculated (discontented 1kV calculates with 0.862 yuan/degree), expend 228 yuan in 1 year; A small-sized processing and manufacturing factory is equipped with dozens of even more how such equipment; To produce the expense of tens thousand of even hundreds thousand of units in 1 year so, also this only be the consumption that standard small contactor produces, powerful product will consume more the multipotency source and produce higher expense.

Be example with the 60A permanent magnet contactor equally, adhesive power is also about 130w, when needing adhesive; We only need it is sent pulse control signal, and contactor just can rely on permanent magnetism to be kept closed, and coil need not consumed power again; That is to say that coil just is 0 power consumption as long as an adhesive is controlled! The disconnection control principle is the same.

Through simplifying and optimizing; The permanent magnet contactor of built-in control circuit has realized that not only traditional contactor outage is from the identical function that breaks off; And also not significantly rising of cost, therefore no matter from economic angle, or energy-saving and emission-reduction; Permanent magnet contactor has comprehensive advantage, and the effect that it brings also will be revolutionary for traditional product.

Description of drawings

Fig. 1 separates sketch map for permanent magnet contactor;

Fig. 2 is the closed sketch map of permanent magnet contactor.

Embodiment

Further specify the utility model below in conjunction with accompanying drawing

See also Fig. 1; Permanent magnet contactor comprises shell 1 and base 11; And be arranged on Metal Contact sheet 2, motion pedestal 4, iron core 9, combined floodgate drive coil 7, separating brake drive coil 8 and the permanent magnet 5 in the shell 1, and Metal Contact sheet 2 and permanent magnet 5 are separately fixed at the both sides of motion pedestal 4, and iron core 9 is located on the base 11; Combined floodgate drive coil 7 is wrapped on the iron core with separating brake drive coil 8; Be provided with elastomer 6 between motion pedestal 4 and the iron core 9, also be provided with metal connection end 3 on the said housing 1, metal connection end 3 and the 2 corresponding settings of Metal Contact sheet.

When drive coil 7 is passed to switching current; Iron core 9 generation magnetic fields are adsorbed on permanent magnet 5 on the iron core 9, when current vanishes; Because the characteristic of permanent magnetism; Permanent magnet 5 is adsorbed on the iron core 9 firmly, and the Metal Contact sheet 2 that drives on the motion pedestal 4 that moves down of permanent magnet 5 contacts with metal connection end 3, realizes that contactor is closed.

Claims

1. a permanent magnet contactor comprises shell and base, and in the enclosure Metal Contact sheet, motion pedestal, iron core, coil and permanent magnet are set; It is characterized in that Metal Contact sheet and permanent magnet are separately fixed at the both sides of motion pedestal, iron core is located on the base; Coil is wrapped on the iron core; Be provided with elastomer between motion pedestal and iron core, also be provided with the metal connection end on the said housing, the corresponding setting of metal connection end with the Metal Contact sheet.

2. a kind of permanent magnet contactor as claimed in claim 1 is characterized in that, coil comprises combined floodgate drive coil and separating brake drive coil.

3. a kind of permanent magnet contactor as claimed in claim 1 is characterized in that, permanent magnet is strong magnetic neodymium iron boron.