DE2162104C3 - Bobbins for concentric windings of a transformer or a choke coil - Google Patents

Description

then secured both concentric windings, the an axial cooling air duct in connection with the air passages in the flanges of the bobbin allows.

With a horizontal arrangement of the bobbin axis, the outer winding is advantageous of at least two partial windings arranged at a distance from one another on the spacer bars built, between which cooling air can flow.

Transformers and inductors can also be used with bobbins according to the invention Produce more than two windings, the outer winding in each case by separate, in the Edge slots inserted spacer strips is separated from the adjacent inner winding and the relevant Spacer bars form the respective coil base.

The invention is based on a simple square bobbin shown in the drawings with two windings explained in more detail below.

Fig. 1 shows a perspective view wound bobbin according to the invention;

F i y. 2 shows a section through the coil body according to FIG. 1.

The coil body 1 consists of the coil base 4 with a square cross section and the square Flanges 6, the diagonally inwardly directed edge slots 5 from the corners as well as those in between Have air passages 8. on

The inner winding 3 is applied to the coil base 4. The spacer strips 2 that are inserted into the edge loop 5 and are fixed solely by this are out of engagement with the winding 3. They form the coil base for the outer winding 7 and result

together with the air passages 8, an annular air duct 9. The spacer strips 2 have incisions, which ensure axial fixation in the edge slots S. When used horizontally, the outer Winding 7 subdivided so that a distance 10

ao frcibleibi between the two partial windings. diiivh that an air flow can fulfill.

1 sheet of drawings

Claims (3)

joined spacer strips by gluing, VerPatent claims: welding or the like, with the flanges. Such connection points form mechanical weak points, 1. Coil bobbins for concentric, depending on the when winding the coils and in particular a ring air duct separated from each other and Scblußkräftec occurring not sufficiently safe each mounted on a spool base, able to withstand the forehead. In addition, the offsets are Covered the flanges of the bobbin, it would stand air-cooled in the given recesses Windings of a transformer fitted spacer bars unchangeably, so that for or a choke coil, the flanges in compliance with certain annular air gap widths In the area of each ring air duct, air outlets and properly dimensioned windings are required is ver outside the area in the circumferential direction, which at least makes the winding advantage more difficult Slots for the fixed mounting of achspar- ganges means that are cheap for large quantities allelic spacers to be produced as the coil base is particularly disadvantageous. Most have, characterized marked- The invention is based on the object of a net that in the from the edge of the flanges (6) from 15 bobbins of the type mentioned to schafnach internally extended slots (edge slots 5) fen, in which after the application of the inner which in its longitudinal direction end over the winding the spacer strips from the flange edge Spacer strips (2) protruding from the flanges (6) can easily be inserted and provide a secure hold Inserted in the longitudinal direction in such a way that it is non-displaceable, the spacer strips are achieved as well as ti «· -iimseitiges are and that Hie spacer strips (2) for this purpose over 20 deflection of the flanges in the case of the Aufwikdie Flanges (6) protruding parts with no resulting forces or larger short-circuit forces Cross-section than the edge slot width is reliably prevented without the dimensional and at the distance between the two flanges, an edge slot width that is difficult to adjust to the spacing strips and the slots adjusted reduced cross-rende conditions met and special fastening cut and that the length of the edge measures must be taken, and further slots (5) and / or the cross-sections of the ab- the task is set, even with inaccurate measuring strips (2) are chosen so that the latitude of the spooky dimensions defined Ringdes Ring air channel (9) is determined. air gap widths between the coaxial windings 2. bobbin according to claim 1, thereby obtained. indicates that the rectangular coil tore. The problem was solved successfully body the edge slots (5) from the corners in a particularly simple and safe way according to the flange (6) extend diagonally inward. finding by the fact that in the edge of the flanges 3. Coil body according to claim 1 or 2, therefrom inwardly extending slots (edge slots) characterized in that the outer winding extends in its longitudinal direction at the end over the flange (7) from at least two spacing strips protruding at a distance (10) from one another in longitudinal direction on the spacer bars (2) arranged device are inserted and that the Partial windings exist. Spacer bars for this purpose protruding over the flanges parts with a larger cross section than that Edge slot width and at the distance between the two flanges 40 see a reduced width adapted to the edge slot width Have cross-section and that the length of the edge slots and / or the cross-sections of the The invention relates to a bobbin stand bars are chosen so that the width of the is intended for concentric, through one ring air channel of each ring air channel. separate from one another and each on a spool stored, of the string-side flanges of the spinner winding in a known manner on the from fenkkörper covered air-cooled windings of an iron core penetrated coil base of the coil transformer or a choke coil, the body being applied. Then the spacer flanges In the area of each ring air duct, air ducts are inserted into the edge slots of the flange leave and outside the area in the circumferential direction 50 unH applied to the outer winding. the Distributes slots for the fixed mounting of spacer strips that cannot be displaced axially, Spacer bars serving as the coil base allow the openwork flanges to evade Exhibit. and thus increase the stability of the entire coil In the case of a known bobbin, the above-mentioned body. The cross-section of the spacer bars and, len type (German utility model 6 606 938) are 55 or the length of the edge joint can be chosen Üe spacer bars in within the flanges so that the spacer bars are either out of engagement Sorted slots inserted and fixed. Because they are on the inside winding or on the inside the inner coil base surrounding the core rest on the outer winding. In the latter case you can Low winding is within the spacer bars, the spacer bars advantageously the inner one these can only be adjusted after the inner winding has been applied and, for example, with a square winding are inserted into the slots, including angularly shaped or square bobbins the required rigidity of the spacer-shaped. In this case, definitely alsten pushing the same through the slots lein the cross-section of the spacer strips the Abdes a flange up to the corresponding one stood between the inner and outer winding. By Slots of the other flange is necessary. This 65 corresponding dimensioning of this distance can sets an exact dimensional accuracy of the cross-sections of the leakage inductance and thus the short-circuit behavior Spacer strips and the slots in advance and the windings required can be influenced. Also is An additional fastening measure changes the one through the spacer strips an annular air duct between