CN203644710U

CN203644710U - Undervoltage release electromagnet

Info

Publication number: CN203644710U
Application number: CN201320797723.XU
Authority: CN
Inventors: 吴惠娟; 蒋文贤; 蒋雷; 黄波
Original assignee: Jiangsu Guoxing Electrical Apparatus Coltd
Current assignee: Jiangsu Guoxing Electrical Apparatus Coltd
Priority date: 2013-12-05
Filing date: 2013-12-05
Publication date: 2014-06-11
Anticipated expiration: 2023-12-05

Abstract

The utility model provides an undervoltage release electromagnet. The undervoltage release electromagnet comprises a shell and an armature, wherein the shell comprises a front end cover and a rear end cover, wherein a coil skeleton is sleeved on the armature, the coil skeleton is fixed in the shell, the front end of the armature stretches out of the shell from the front end cover, the coil skeleton is divided into two segments, a starting winding is winded at the segment which is close to the front end cover, a work winding is winded at the segment which is close to the rear end cover, and the direct current impedance of the starting winding is smaller than the direct current impedance of the work winding. In the undervoltage release electromagnet, the starting winding is added on the basis of a common single coil release electromagnet. The undervoltage release electromagnet is simple in structure and easy to process, with which, large torque starting is achieved, the heat releasing amount of a release is reduced, the voltage adjusting current is reduced distinctly, and the reliability is improved greatly. The undervoltage release electromagnet is applicable for transformations of most long-time electromagnets.

Description

Undervoltage tripping electromagnet

Technical field

The utility model relates to low voltage electrical apparatus technology field, relates in particular to a kind of undervoltage tripping electromagnet.

Background technology

Device for under-voltage releasing equipment, shunt release are circuit breakers, especially one of critical elements of frame-type circuit breaker.Under-voltage release is in the time that its terminal voltage is down to a certain prescribed limit, a kind of release that makes circuit breaker have time delay or disconnect without time delay, when supply voltage declines, even slow decreasing is in 70% to 35% scope of rated operational voltage, under-voltage release should operate, under-voltage release supply voltage equal release rated operational voltage 35% time, under-voltage release should be able to prevent that circuit breaker closing is complete, trip coil dead electricity, in coil, moving armature has back-moving spring to eject-thread off; When supply voltage is equal to or greater than the rated operational voltage of 85% under-voltage release, under hot condition, should be able to guarantee that circuit breaker is reliably closed, trip coil obtains electric, and in coil, moving armature has coil electromagnetic force to overcome spring force to suck and keep certain moment-adhesive.The essence of undervoltage tripping, be prevent circuit breaker subordinate electric equipment be operated under under-voltage condition electric current excessive after, the effective measures that electric equipment self-heating increases the weight of.

The problems such as existing electromagnetic undervoltage release ubiquity coil heating amount is high, device for under-voltage releasing equipment staring torque is little and circuit is too complicated; The particularly more and more requirement of the circuit breaker of miniaturization, device for under-voltage releasing equipment is miniaturization also, the device for under-voltage releasing equipment of miniaturization is mostly take working of plastics as coil rack, plastic skeleton is subject to the undesirable element impacts such as high temperature, type become, aging, dust pollution, causes moving armature often to have and is occurred by phenomenons such as " stuck (not adhesives) "; Even if the small-sized device for under-voltage releasing equipment of all-metal structure, also has similar phenomenon to occur; Finally cause circuit breaker not close a floodgate, affected operation of power networks, if but the holding power of increase electromagnet, just can cause coil heating amount high, even if cause release to be burned the small-sized device for under-voltage releasing equipment of all-metal structure, also has similar phenomenon to occur.Finally cause circuit breaker not close a floodgate, affected operation of power networks.

Utility model content

The technical problems to be solved in the utility model is: little in order to overcome unicoil electromagnet moment in the time starting adhesive that existing electromagnetic undervoltage release, shunt release generally adopt, when normal work, coil heating amount greatly, often has not adhesive phenomenon, control circuit too complicated, the technical problem of especially can not be under adverse circumstances reliable adhesive and dropout, the utility model provides a kind of undervoltage tripping electromagnet to solve the problems referred to above.

The utility model solves the technical scheme that its technical problem adopts: a kind of undervoltage tripping electromagnet, comprise housing and armature, described housing comprises front end housing and rear end cap, on described armature, be arranged with coil rack, described coil rack is fixed in housing, the front end of described armature is from front end housing extends housing, described coil rack is divided into two sections, on one section of close front end housing, be wound with startup winding, one section near rear end cap is wound with Working winding, and the DC impedance of described startup winding is lower than the DC impedance of Working winding.

Concrete, on described rear end cap, be fixed with guide post, on described guide post, be arranged with spring, the rear end of described armature offers groove, and the rear end of described armature is set on spring by groove.

General, on described coil rack, thering is the first terminal, the second terminal and the 3rd terminal, one group of Same Name of Ends merging of described startup winding and Working winding is connected on the first terminal, and other one group of Same Name of Ends is connected with the second terminal and the 3rd terminal respectively.

Frictional force when reducing armature in adhesive or to thread off, is fixedly installed front support piece on described front end housing, described front support piece is inlayed and is provided with lubricated copper sheathing, and the front end of described armature passes and extends to outside housing from lubricated copper sheathing.

Concrete, on described rear end cap, being fixedly installed rear bearing block, described guide post is inlayed and is arranged on rear bearing block.

The beneficial effects of the utility model are, this undervoltage tripping electromagnet, on common unicoil release electromagnet basis, is provided with startup winding, simple in structure, and handling ease starts winding operating current large, can guarantee electromagnetic actuation; Working winding operating current is little, the holding power of electromagnet is provided, this makes electromagnetic type twin coil release electromagnet not only possess high-power start but also possess the feature that holding power is not high, realize high-torque startup, make again release entirety caloric value little, pressure regulation electric current obviously reduces, and reliability greatly improves, the transformation of electromagnet processed while being suitable for great majority length.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the utility model is further illustrated.

Fig. 1 is the structural representation of the optimum embodiment of the utility model undervoltage tripping electromagnet.

In figure 1, housing, 2, armature, 3, front end housing, 4, rear end cap, 5, coil rack, 6, start winding, 7, Working winding, 8, guide post, 9, spring, 10, groove, 11, the first terminal, 12, the second terminal, 13, the 3rd terminal, 14, front support piece, 15, lubricated copper sheathing, 16, rear bearing block.

Embodiment

By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, and basic structure of the present utility model is only described in a schematic way, and therefore it only shows the formation relevant with the utility model.

As shown in Figure 1, the utility model provides a kind of undervoltage tripping electromagnet, comprise housing 1 and armature 2, housing 1 comprises front end housing 3 and rear end cap 4, on armature 2, be arranged with coil rack 5, coil rack 5 is fixed in housing 1, coil rack 5 is divided into two sections, on one section of close front end housing 3, be wound with and start winding 6, one section near rear end cap 4 is wound with Working winding 7, start the DC impedance of winding 6 lower than the DC impedance of Working winding 7, start winding 6 DC impedances low, operating current is large, can make armature 2 complete complete adhesive action, Working winding 7 DC impedances are large, maintain electric current little, in omnidistance voltage range, only Working winding 7 is applied to voltage, can not cause armature 2 adhesives, only starting under the effect of winding 6, armature 2 ability adhesives, armature 2 after adhesive remains attracting state by Working winding 7, on guide post 8, be arranged with spring 9, the rear end of armature 2 offers groove 10, the rear end of armature 2 is set on spring 9 by groove 10, on coil rack 5, there is the first terminal 11, the second terminal 12 and the 3rd terminal 13, one group of Same Name of Ends merging of described startup winding 6 and Working winding 7 is connected on the first terminal 11, other one group of Same Name of Ends is welded on respectively on the second terminal 12 and the 3rd terminal 13, on front end housing 3, riveted joint has front support piece 14, front support piece 14 is inlayed and is provided with lubricated copper sheathing 15, the front end of armature 2 passes and extends to outside housing 1 from lubricated copper sheathing 15, on rear end cap 4, riveted joint has rear bearing block 16, guide post 8 is inlayed and is arranged on rear bearing block 16.

Take above-mentioned foundation desirable embodiment of the present utility model as enlightenment, by above-mentioned description, relevant staff can, not departing from the scope of this utility model technological thought, carry out various change and modification completely.The technical scope of this utility model is not limited to the content on specification, must determine its technical scope according to claim scope.

Claims

1. a undervoltage tripping electromagnet, it is characterized in that: comprise housing (1) and armature (2), described housing (1) comprises front end housing (3) and rear end cap (4), on described armature (2), be arranged with coil rack (5), described coil rack (5) is fixed in housing (1), the front end of described armature (2) is from front end housing (3) extends housing (1), described coil rack (5) is divided into two sections, on one section of close front end housing (3), be wound with and start winding (6), one section near rear end cap (4) is wound with Working winding (7), the DC impedance of described startup winding (6) is lower than the DC impedance of Working winding (7).

2. undervoltage tripping electromagnet as claimed in claim 1, it is characterized in that: on described rear end cap (4), be fixed with guide post (8), on described guide post (8), be arranged with spring (9), the rear end of described armature (2) offers groove (10), and the rear end of described armature (2) is set on spring (9) by groove (10).

3. undervoltage tripping electromagnet as claimed in claim 1, it is characterized in that: on described coil rack (5), there is the first terminal (11), the second terminal (12) and the 3rd terminal (13), one group of Same Name of Ends merging of described startup winding (6) and Working winding (7) is connected on the first terminal (11), and other one group of Same Name of Ends is connected with the second terminal (12) and the 3rd terminal (13) respectively.

4. undervoltage tripping electromagnet as claimed in claim 1, it is characterized in that: on described front end housing (3), be fixedly installed front support piece (14), described front support piece (14) is inlayed and is provided with lubricated copper sheathing (15), and the front end of described armature (2) passes and extends to outside housing (1) from lubricated copper sheathing (15).

5. undervoltage tripping electromagnet as claimed in claim 2, is characterized in that: on described rear end cap (4), be fixedly installed rear bearing block (16), described guide post (8) is inlayed and is arranged on rear bearing block (16).