DE1539061C - Folding anchor electromagnetic system - Google Patents

Description

1 2

The present invention relates to a median plane containing axes and parallel to

Hinged armature electromagnetic system, as it is connected in particular to this running yoke. This yoke

The other for relays, contactors, switchgear and control also serves as a base plate. Its ends are

devices or for other drive purposes use bent towards the central plane; at this turned

finds. The coil cores are screwed tight at 5 ends.

Electromagnet with hinged armature or swivel armature The hinged armature in this known design

are known in various embodiments. is designed in the same way; its bent

In a known embodiment of an elec- ends cover the free ends of the magnet

tromagnets with a rotating armature, the magnetic core has cores and in the closed position rest against them.

on which the coil is wound, a U-shape, io Its middle part runs on the opposite of the yoke.

the pivot anchor above the side of the center plane lying above the two legs outside the

is designed as a rotatable yoke. A stream flows, same.

so the pivot anchor tries to move in the direction of the axis of rotation is centrally located between the two

To move the reduction of the air gap, d. i.e., reels. It is true that with such a training

align in the plane of the U-shaped core. 15 an improvement in the torque characteristics

The disadvantage of such a training is initially teristics; However, it remains disadvantageous that the structural

an unfavorable course of the tensile force or the rotary arrangement in which the magnetic flux in the yoke and

moments depending on the path or angle of rotation. Armature on one side from the center plane of the device

Since the magnetic force depends on the change in the laid, a sensitivity to external

The size of the air gap for a given movement can result in 20 ren magnetic interference fields.

in the embodiment described, no great The construction is quite complex; Besides that

Closing force can be achieved because the vector of the hinged armature are three other main parts, namely the

magnetic flux in the air gap perpendicular to the yoke and two coils, each with a core.

The direction of movement of the anchor ends is and thus in particular also leads with respect to the

a change in the air gap only due to the asymmetrical construction to or from the center plane to an un-

increasing coverage of the pole ends of the core favorable storage of the hinged armature. Since the magnetic

is given by the swivel anchor. table forces act in the middle plane and the

There is also the disadvantage that it is also moved out of the central plane in the locking bearing,

position an air gap must remain, otherwise bending moments can occur, the bearings and

Rotational movement not possible due to friction.Claim 30 bearing journals,

would. Such stresses certainly occur

Apart from the magnetic resistance of the on when the device bumps, shocks and

The air gap results in a large force being exposed to vibrations. The occurring here

between core and anchor, whose direction with the dynamic reaction forces load the bearing

The axis of rotation coincides, so cannot be used 35, and thus result in increased wear and j

can-, but on the contrary by a powerful and can lead to tilting or jamming. j

so that heavy bearings must be caught. It is, after all, an electric folding armature |

The latter disadvantage can be avoided. Magnet system became known in which two U-för- |

if the rotating armature is not present above a U-shaped magnetic cores that are symmetrical j

Core is arranged, but are so between 40 with respect to the armature axis of rotation and where I

the free leg ends of the core is laid so that each of these U-cores has an arm of the armature as a yoke |

the magnetic flux is assigned to the end faces of the roughly rod-shaped. In such a training

shaped armature enters or exits and the magnet are two independent magnetic fluxes

table forces thus in the longitudinal direction of the anchor in each core and the associated anchor half. I.

works. Such a design is easy by 45. Each of these magnetic fluxes must be two air gaps over- j

Arrangement of short, inward polar winds; the entire system thus has four air!

to create shoes at the free ends of the core. split open. Thus also prevail with such

However, the disadvantages outlined above with regard to this arrangement also remain disadvantageous

The unfavorable characteristics of the tensile force - magnetic stray fields and the magnetic I.

or torque curve and the unavoidable 50 resistance.

Air gaps that do not utilize the stray fields. The present invention aims to avoid

allow. application of the aforementioned disadvantages, d. H. the creation

An improvement in the characteristics of the pulling device against shocks, vibrations and the like.

force or Torque curve can only be submitted to secure electromagnets with hinged armatures, if the air gap fans in the closed position 55, robust construction, which provides good shielding

gan /. is closed and here at least one protection against interference fields is guaranteed and without

Component of the magnetic flux in the direction of unused stray fields.

the closing movement falls. With such magnet systems it is assumed that a drive magnet

men is the anchor only limited th of the known training described above, pivotable when it strikes the pole lugs, 60 in which the magnetic flux in the projection

and thus to be referred to as a hinged anchor. a plane perpendicular to the axis of rotation of the armature

A course of an 8 that fulfills the aforementioned condition also has.

Electromagnet with a hinged armature is already known. According to the invention, the anchor is in its central part

This known electromagnet has two parallel to one another as one which encompasses the core with the winding Spools on, with the lower 65-sided, rectangular frame formed by

End of one coil core with the upper end of the axially parallel frame sides two central

of the other coil core by an oblique to the longitudinal symmetry to the armature axis, the pole j

axis of the coils outside of the two coil approaches the core covering anchor arms off \

go in such a way that the magnetic flux running in the armature splits over the frame sides in two Partial routes are branched and diverted around the core.

It is particularly useful to make the core rod-shaped and one at each end at right angles Pole attachment protruding to the rod axis in a centrally symmetrical Arrangement to be provided.

It is also useful to place the anchor in the middle part of the frame sides that do not carry anchor arms to store.

Finally, it is useful if the interacting surfaces delimiting the air gap the pole approaches and the armature arms each lie in a plane passing through the armature axis. Through the The latter training achieves a favorable tensile force characteristic with a large closing force.

Further details are explained below using an exemplary embodiment.

Fig. 1 shows the side view of an inventive Electromagnets;

FIG. 2 shows the section along line H-II from FIG. 1 represents;

F i g. 3 shows a training with sloping poles.

The coil 3 is wound onto the magnetic core 1. Pole shoes 4 and 5 go from both ends in this way from that core 1 and pole pieces 4 and 5 together form an approximately Z-shape. The armature 2 has a Core 1 encompassing middle part, from which ends on opposite sides in different directions go out, which interact with the free surfaces of the pole pieces 4 and 5.

The anchor 2 is on both sides of the in F i g. 2 center plane shown in dash-dotted lines at 6.

The whole arrangement is centrally symmetrical to the bearing axis.

The torque curve can by chamfering 'of the pole ends, as shown in Fig. 3, and changed to a desired course be adapted. In FIG. 3, both air gaps lie in a plane passing through the axis of rotation 6. This results in a maximum closing torque, because here the vector of the magnetic force in the closing gap runs at a maximum distance from the axis of rotation 6.

The described electromagnet with hinged armature is activated by external magnetic fields such as those in electrical appliances occur, because of the core encompassing and shielding armature is not affected. In spite of its very simple structure, it is very robust, especially in terms of storage, and thus also reliable against knocks, shaking and vibrations.

Claims (4)

Patent claims: 1. Hinged armature electromagnetic system with two-armed armature and an S- or Z-shaped armature Core part in which the flow of flux in the closed magnetic circuit in the projection on a plane perpendicular to the armature axis has the shape of an 8 and in which between the core carrying the winding and the armature ends, two useful air gaps are arranged symmetrically to the armature axis, characterized in that the anchor in its central part as a core with the Winding comprehensive four-sided, right-angled frame is formed from its axially parallel Frame sides two symmetrically arranged to the armature axis, the pole approaches of the core overlapping armature arms go out in such a way that the magnetic flux running in the armature branches into two partial paths via the frame sides and is routed around the core. 2. Electromagnet system according to claim 1, characterized in that the core is rod-shaped is formed and at each end a pole extension protruding at right angles to the rod axis in has a centrally symmetrical arrangement. 3. Electromagnet system according to claims 1 and 2, characterized in that the armature is mounted on the middle part of the frame sides not bearing anchor arms. 4. Electromagnet system according to claims 1 to 3, characterized in that the cooperating, the air gap delimiting surfaces of the pole attachments and the armature arms each in a plane passing through the armature axis lie. 1 sheet of drawings