DE1638514A1 - Coil for a high voltage transformer of low power - Google Patents

Description

Dipl.-Ing. F.-J. COPPER MAN

Patent attorney 1 6 3 8 5 1 A

Applicant: Philips PutenivorwaUung GmbH.

File No. PHD- 1017
Registration from; April 12, 1967

Philips PatentVerwaltung GmbH, Hamburg 1, Mönckebergstrasse 7

"Coil for a high-voltage, low-power transformer"

The invention relates to a coil for a low-power high-voltage transformer with several taps, in particular for the line deflection in cathode ray tubes, which is made up of several nested partial coils. '

It has already been proposed a coil for a high voltage transformer Build up low power with several taps by nesting partial coils. The individual coil sections have a high copper fill factor and are strictly wound in layers without the insulating layers separating the individual layers. The individual turns of the coil winding are then glued to one another in the position given by the winding. Such coils are wound as orthocyclic

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Called coils. The individual orthocyclically wound partial coils, the coil wire of which is covered with a multilayer insulation layer, preferably a three-layer insulating layer, are nested without separating insulating layers .

The proposed coil structure has the advantage that the transformer coils fully automatic according to the orthocyclic winding process can be wound and that only the nesting and the manual labor in the manufacture of the entire coils the soldering of the taps arise.

During the orthocyclic winding process, in which ensured is that no turn of any coil layer can fall between the turns of an underlying coil layer, absolutely is safely mastered, these safety factors are not as extensive in the case of a multi-layer insulating coating safe to look at. Production inaccuracies with regard to the wire insulation can therefore give rise to coil defects give. In addition, the coil manufacturer is not able to supply every meter of coil wire used in front of his Use to check the coil insulation, and he must therefore, even if the coils that have a high Layer tension as well as a large layer width and thus high dielectric losses than orthocyclic wound If you want to use coils, you can rely entirely on the wire manufacturer with regard to its coil quality. This dependency however, is unsatisfactory from the wire manufacturer.

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It is an object of the invention to provide a coil which is indeed formed by nesting, in which the coil manufacturer but in the case of critical partial windings, the wire manufacturer's quality promises are not limited to the permissible ones Has to leave the borders.

In the case of a coil for a low-power high-voltage transformer with several taps, in particular for the line deflection in cathode ray tubes, which is made up of several sub-coils nested inside one another, the object is achieved in that, according to the invention, at least one of the sub-coils, whose dielectric losses in operation never can cause the destruction of the coil, has a high copper fill factor and is wound strictly layer by layer without the individual layers of separating insulating layers, the turns in the layer given by the winding being glued to one another and the coil wire having a multi-layer insulation location, while the partial coils have their dielectric Losses can destroy the coils, wound with insulating layers separating the individual layers | are.
The dielectric losses result from the formula!

^P diel. - U ² -U- £ * ίΑ tang /

U is 2 χ the layer voltage, uJ is the angular frequency, £ is the relative dielectric constant, fo is the absolute dielectric constant, F is the effective surface of two adjacent layers, J? same as that

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Distance between the two layers and tan J equal to the dielectric loss factor. In the case of the orthocyclically wound coil, the distance j? of the two layers given by the thickness of the lacquer layer, while the value of- ^ for the winding with an intermediate layer results from the film thickness.

In such a coil according to the invention, in which the critical windings are semi-automatically layered with intermediate insulation are wound, the less critical coil parts are wound orthcyclically and thus fully automatically. Even though the semi-automatically wound critical sub-bobbins thus require a higher manual workload, remain the total production costs are nevertheless considerably below the production costs of the coils commonly used today for high-voltage transformers return. This is also due to the fact that inside the semi-automatically wound coil no taps need to be made.

The invention is explained in more detail with reference to the embodiment shown in the drawing.

A tubular mandrel 1 is in a mounting flange 3

set, which is provided with connecting pins 5. On the tubular In the mandrel 1, three sub-coils 7, 9 and 11 are placed one inside the other. The coil section 7 forms the lowest on the mandrel 1, automatically wound according to the orthocyclic winding process, the one smaller layer width and lower layer tension

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and thus has lower dielectric losses than the sub-coil 9 above it. The dielectric losses of the coil section 7 are so small that in no possible case of operation they will destroy the coil v / can earth. The individual turns of the coil section 7 are after the orthocyclic winding together '/ have been glued, so that they remain in their mutual position.

The coil 9 has a larger layer width and a higher layer tension is applied to it. Your dielectric losses are therefore greater, so great that there is a risk of possible destruction during operation. For this reason, the risk of damage or breakdown between the individual turns lying one on top of the other is significantly greater than with winding 7. The winding is therefore wound in layers using a conventional coil winding process, with the individual layers then being made electrically by means of insulating layers IJ of high tan if electrical are separated from each other. Insulation faults in individual wire sections can therefore not lead to breakdowns at the critical points between the individual layers.

A further orthocyclically wound partial coil 11 is then placed on the coil section 9, which is wound in the conventional manner with separating insulating layers between the individual layers, the wires 15 of which are glued to one another as well as the wires of the coil J. In the case of the coil 11, the dielectric

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Losses again so small that di-s S -'- i '^ törum; do not experience given is.

At least the wires 15 of the coils 7 and 7 are included provided with a three-layer coating.

Patent claims:

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ÖAD ORIGINAL.

Claims (2)

Claims · .- ■; ^ · t 1. Coil for a high voltage transformer lower Multi-tap performance, especially for line deflection at. Cathode ray tubes made up of several one inside the other nested coil sections, characterized in that that at least one of the sub-coils (7 * 11) * their dielectric losses during operation can never destroy the coil, has a high copper fill factor and without insulating layers (13) separating the individual layers, it is continuously wound in layers, the turns in the -. "La ;; ö given by the winding are glued together and the coil wire has a multilayer insulating coating, • vähi'encl the sub-coils (9), whose dielectric losses the Destruction of the coils does not cause any, with a large layer width and / or. large layer tension with the individual layers from each other separating insulating layers (Ij) are wound, 2. Coil according to claim 1, characterized in that the { first and third of the nested coils (7, 9, 11) without separating insulating layers (Ij) strictly in layers are automatically wound and the second coil in a conventional manner with insulating layers separating the individual layers is wrapped. 009835/0565 Blank page