CN201044230Y

CN201044230Y - Electromagnetic system for dynamoelectric switching device

Info

Publication number: CN201044230Y
Application number: CNU2007200698733U
Authority: CN
Inventors: 杨帆; 吴品华; 包秀杰; 陈红
Original assignee: Delixi Electric Co Ltd
Current assignee: Delixi Electric Co Ltd
Priority date: 2007-05-15
Filing date: 2007-05-15
Publication date: 2008-04-02
Anticipated expiration: 2017-05-15

Abstract

The utility model relates to an electromagnetic system for an electromechanical switching device, comprising an electromagnetic coil, a core which is inserted into an axial opening of the coil, an inner magnetic yoke winded with the coil, an outer magnetic yoke opposite to the inner magnetic yoke, a permanent magnet which is arranged between the inner magnetic yoke and the outer magnetic yoke, and a foundation plate which is fixed with one end of the core, wherein, the foundation plate is arranged between the inner magnetic yoke and the outer magnetic yoke, a sheet spring is arranged between the foundation plate and the inner magnetic yoke. In the electromagnetic system which adopts the utility model, the foundation plate can limit active traveling of the core, the sheet spring arranged between the foundation plate and the inner magnetic yoke is used to prevent the foundation plate bonding on the inner magnetic yoke and provides an reaction for the core, so the core can automatically recover to the original state after being released.

Description

The electromagnetic system that is used for electromechanical switching device

Technical field

The utility model relates to a kind of electromagnetic system that is used for electromechanical switching device, relates in particular to the electromagnetic system of the electromagnetic contactor of the dc operation that contains permanent magnet.

Background technology

Electromagnetic system is made up of magnetic system and coil, in order to electric appliance component or the parts that carry out electromagnetic conversion.Electromechanical switching device mainly is to borrow coil excitation to make system's magnetization as the electromagnetic system of contactor, relay etc., produces electromagnetic attraction and attracts armature, makes it motion and makes mechanical power, thereby reach some predetermined purpose.The size that drives the required coil excitation electric current of armature is relevant with the energy consumption size of electromechanical switching device and the size of caloric value.In order to satisfy the needs of many applications to the electromechanical switching device miniaturization, the most basic improvement target is when improving the electromagnetic system response sensitivity, should keep alap required electric current.Can make it sensitiveer and increase permanent magnet in traditional direct solenoid system, respond fasterly, exciting curent is lower.(application number: 02144395.5), but it is applicable to that coil current is the electromagnetic system that exchanges for this class electromagnetic system such as Chinese patent disclosed " electromagnetic system that is used for electromechanical switching device and electromagnetic relay ".In addition, Chinese patent also discloses " electromagnetic switchgear " (patent No. 97192239.X), and this electromagnetic switchgear is to realize by the electromagnetic system of the DC electromagnet system that adopts permanent magnetism.Be characterized in, inner yoke is designed to the other end around movable core in addition, enough magnetic conductances of magnetic line of force transition have been guaranteed between yoke and movable core, to be used for, has a cavity that is used for holding a compression spring at the other end of movable core in addition, provide the counter-force of electromagnetic system with this, the magnetic field mutual superposition of its magnetic line of force and system of electromagnetic realizes the efficient control of electromagnet thus.

The utility model content

The purpose of this utility model is to provide a kind of electromagnetic system that is used for electromechanical switching device, lower than traditional electromagnetic system power loss, volume is littler, the response sensitiveer.

To achieve these goals, the technical solution of the utility model is as follows:

A kind of electromagnetic system that is used for electromechanical switching device, comprise solenoid, insert the iron core in the axial aperture of coil, the inner yoke of wound coil, the outer yoke relative with inner yoke, be provided with permanent magnet between inner yoke and the outer yoke, an end of iron core is fixed with a soleplate; Described soleplate places between inner yoke and the outer yoke, is provided with a sheet spring between soleplate and inner yoke.

Adopt electromagnetic system of the present utility model, soleplate can limit the movable stroke of iron core, between soleplate and inner yoke, be provided with a sheet spring, be used to prevent that soleplate is bonded on the inner yoke and to iron core that one counter-force is provided, automatically restore to reset condition after iron core is discharged.

Above-mentioned springs can change to anti-adhesive plate, is used to prevent that soleplate is bonded in inner yoke, and soleplate and contact support are of coupled connections, and a spring is housed in the contact support, is used to produce counter-force so that contact support and soleplate are returned to reset condition.

Permanent magnet is arranged in the position of the magnetic field mutual superposition of its magnetic line of force and solenoid.Make that when the winding de-energisation, suction reduces, simultaneously when with rated current during to the winding excitation, suction increases thereupon, realizes thus efficiently controlling.

This system comprises that also one increases magnetic sheet, and this increases the other end that magnetic sheet is positioned at iron core, and places between inner yoke and the coil bottom, is used to reduce the air-gap between iron core and the inner yoke, increases the suction and the response sensitivity of electromagnetic system.

Also be provided with an anti-adhesive plate between soleplate and the outer yoke, prevent that soleplate is bonded on the outer yoke.

Description of drawings

Fig. 1 is the stereogram that is in the electromagnetic system of the present utility model under the confined state;

Fig. 2 is the cutaway view of Fig. 1;

Fig. 3 is the isometric exploded view that has the electromagnetic system of the present utility model of base;

Fig. 4 is the isometric exploded view of another embodiment of the present utility model.

Embodiment

According to Fig. 1 to Fig. 4, provide preferred embodiment of the present utility model, and described in detail below, enable to understand better function of the present utility model, characteristics.

Fig. 1 to Fig. 3 has shown the electromechanical switching device that is used for of the present utility model, especially for the electromagnetic system of electromagnetic contactor.Electromagnetic system 1 is packed in the base 11, and base upper end open place is provided with actuating mechanism and contact system (not shown), and electromagnetic system 1 is connected with actuating mechanism by soleplate 3, thereby purpose is scheduled in realization.As shown in the figure, inner yoke 6 wound coils 2 symmetric arrangement, outer yoke 4 is relative with inner yoke 6, between the two, insert a permanent magnet 5, iron core 8 inserts in the axial aperture of coil 2, and can be in its axial aperture flexible motion, one end of iron core 8 is fixed with a soleplate 3, this soleplate 3 places between inner yoke 6 and the outer yoke 4, be used to limit the movable stroke of soleplate 3 and iron core 8, some stretches out inner yoke 6 soleplate 3, outside the outer yoke 4, be used for and being of coupled connections of actuating mechanism, between soleplate 3 and inner yoke 6, be provided with a sheet spring 9, be used to prevent that soleplate 3 is bonded in inner yoke 6, and provide a counter-force to iron core 8, after being discharged, iron core 8 can automatically restore to reset condition.At the other end of iron core 8, be provided with one between inner yoke 6 and coil 2 bottoms and increase magnetic sheet 10, be used to reduce the air-gap between iron core 8 and the inner yoke 6, increase the suction and the response sensitivity of electromagnetic system.Also be provided with an anti-adhesive plate 7 between soleplate 3 and the outer yoke 4, prevent that soleplate 3 is bonded on the outer yoke 4.

The operation principle of electromagnetic system 1 of the present utility model is as follows, when no current passes through in the coil 2, iron core 8 and soleplate 3 are under the acting in conjunction of the magnetic loop that springs 9 and permanent magnet 5 provide, be maintained on the corner of outer yoke 4, anti-adhesive plate 7 usefulness nonmagnetic substances are made, and are used to prevent that soleplate 3 is bonded in outer yoke 4.When passing through exciting current in the coil 2, the magnetic current that acts on the armature 8 increases, and armature 8 is attracted to a side that increases magnetic sheet 10, and also to a lateral movement of inner yoke 6, springs 9 is compressed soleplate 3, finishes the electromagnetic system attracting process.When encouraging of coil 2 swashed current vanishes, springs 9 provided a counter-force to iron core 8, and iron core 8 is discharged, and returned to reset condition.

Fig. 4 is another embodiment of the present utility model, springs 9 among Fig. 3 can change to anti-adhesive plate 12, be used to prevent that soleplate 3 is bonded in inner yoke 6, soleplate 3 is of coupled connections with contact support 13, one spring 14 is housed in the contact support 13, is used to produce counter-force so that contact support 13 and soleplate 3 are returned to reset condition.

Above-described, be preferred embodiment of the present utility model only, be not in order to limiting scope of the present utility model, the foregoing description of the present utility model can also be made various variations.Be that every simple, equivalence of doing according to the claims and the description of the utility model application changes and modification, all fall into the claim protection range of the utility model patent.

Claims

1. electromagnetic system that is used for electromechanical switching device, comprise solenoid, insert the iron core in the axial aperture of coil, the inner yoke of wound coil, the outer yoke relative with inner yoke, be provided with permanent magnet between inner yoke and the outer yoke, an end of iron core is fixed with a soleplate; It is characterized in that described soleplate places between inner yoke and the outer yoke, between soleplate and inner yoke, be provided with a sheet spring.

2. the electromagnetic system that is used for electromechanical switching device as claimed in claim 1 is characterized in that, permanent magnet is arranged in the position of the magnetic field mutual superposition of its magnetic line of force and solenoid.

3. the electromagnetic system that is used for electromechanical switching device as claimed in claim 2 is characterized in that, this system comprises that also one increases magnetic sheet, and this increases the other end that magnetic sheet is positioned at iron core, and places between inner yoke and the coil bottom.

4. the electromagnetic system that is used for electromechanical switching device as claimed in claim 3 is characterized in that, also is provided with an anti-adhesive plate between soleplate and the outer yoke.

5. electromagnetic system that is used for electromechanical switching device, comprise the iron core in the axial aperture of contact support, solenoid, insertion coil, the inner yoke of wound coil, the outer yoke relative with inner yoke, be provided with permanent magnet between inner yoke and the outer yoke, an end of iron core is fixed with a soleplate; It is characterized in that described soleplate places between inner yoke and the outer yoke, be provided with an anti-adhesive plate between soleplate and inner yoke, a soleplate and a contact support are of coupled connections, and a spring is housed in the contact support.