JPS58192313A - Transformer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates in particular to a transformer with an oxide ceramic core, further comprising seven flanges mounted with nine coil formations and a multilayer winding in the winding space between these flanges. a transformer comprising separate windings, one on top of the other, insulated from each other by insulating foil, and a spacer provided between the local coil terminal of the shaft and the coil former flange. Transformers are susceptible to creeping currents and have no resistance to them, especially when the operating voltage is high, the operating voltage difference is large, and the operating frequency is high. Therefore, special measures have to be taken to increase the path length of the creep current.

It is known to increase the length of the creep current path in a transformer by inserting an insulating foil between windings with significantly different voltages.

However, the region of the transformer near the flange of the coil formation nevertheless remains in a critical state or at risk. This is because the creep path is relatively short in these regions kJ. German Utility Model No. 69878
It is known from No. 15 that the length of the creep path can be increased by inserting into a coil formation fitted with a first winding another coil formation fitted with another winding. .

However, this is only suitable for transformers with low operating frequencies. The reason for this is that transformers do not require such an intimate and profound connection. It is known to insert an elastic collar into the slot between the 7 langes. This resilient collar keeps the secondary coil at a certain distance from the coil 7 langes. The creep current R, the length of the path is thus increased.

However, this structure is very inflexible because the collar can only be used for one type of coil or transformer at a time. Furthermore, guiding the tangent of the coil beyond the collar remains problematic.

The aim of the invention is to provide a transformer in which the known collars are substantially simplified and which allows even tangential and large connecting strips to be guided between the coils.

The object according to the invention is achieved in that the spacer is configured as a spacer block distributed along the winding circumference and leaving a gap between the winding end and the flange around the axis.

These spacer blocks have a simple construction and supply the tangents or connecting strips from the flanges and the contact strips by virtue of forming a gap between the layer ends of the circumference of the shaft and the 7 flanges. make it possible. This structure is extremely flexible with respect to transformer deformation and is particularly suitable for automation of the winding process. 1 In another embodiment according to the invention, the width of the spacer blocks is selected according to insulation requirements. This transformer can be easily adapted to other insulation requirements by varying the width of this spacer block.

In another embodiment according to the invention, the spacer block is fixed to the flange of the coil so that it is guided in a guide around the axis.

This transformer structure is suitable for round 11 spaces as well as rounded winding spaces. The guidance of this coil to the spacer block on the seven flange can also be adapted to the relevant requirements. Thus, a dovetail guide can be provided, but it is also simply possible to provide a transverse guide. If adhesive is used, the guide can be omitted. Install a spacer block in contact with the 7 langes of the coil.

Directed solely by manufacturing requirements.

Embodiments of the present invention will now be described in detail with reference to the drawings. This drawing shows the right half of a transformer with a partially cut-out winding installed. This oxide ceramic transformer has a core, that is, an iron oxide ceramic core. The device consists of a coil forming body 1, 7 lunges 8
and a winding tube S that connects the flanges 8 to each other.The winding space 7#'i between the 07 flange 8 and the winding tube 5, for example, the -next winding 1j9 and the secondary winding@ It is filled with 11. In addition to the rims or projections 17 extending through the winding tube 6, there are two yokes or yokes 13, each located at the axial end of the winding tube 6, and two further outer projections (rims) 16. On the 07 langes δ, on which oxide ceramic material is used to close this core, there is a tangent cast into the plastic jacket 19!
! 1 is provided.

The primary winding 9 of the transformer is first wound onto the winding tube. The end 28#2 of this winding H9 around the shaft abuts the spacer block 25 inserted between the winding end 828 of the shaft mb and the seven flange 8 of the coil. The height of this spacer block 25 corresponds to the height of the winding of the primary winding-9.

This Nupe Sabro 771i5Vi, 7 lunges δ of the coil
is guided by a dovetail guide 27. It is fixed to the 7 langes 8 of this Suba block gIsFi coil. In this embodiment, the two spacers at each winding end g8 are located opposite each other at 25ij.

However, instead of this, eight spacer blocks could be used which are offset in relation to each other. Thus the spacer block has a layer HHHz around the axis
A gap 29 is left between s and the 7 lunge. These gaps are suitable for deriving the coil contact #.

As can be seen from the partially cutaway drawing, the insulating foil 81 is placed on the K, - next turn Iw9 so that the insulating foil 81 extends across the spacer block 25 to the seventh flange δ of the coil. A secondary winding H11 is wound on this insulating foil 1i181, and the end of the shaft circumference of this secondary winding @11 abuts against the spacer block 26.

The height of the outer spacer block 26 corresponds to the height of the secondary winding 11. Across this secondary winding 11 another insulating foil, not shown, is arranged, including a spacer block 26 .

Using this structure, it is of course also possible to deposit further windings. The spacer blocks 25, 26 are extremely easy to manufacture, and according to the type of transformer involved, the spacer blocks 25, 26 can be made wide or narrow, and their heights can be made large or small. can also be made. Additionally, these spacer blocks can be secured to the seven flange of the coil by dovetail guides or other guides.

In summary, the present invention particularly provides a coil forming body (1) for a multilayer winding i (9, 11) which is made of an oxide ceramic core and which can be provided in a winding space (7) between seven flanges (8). Equipped with. The individual windings are arranged one on top of the other and are insulated from each other by insulating foil (81). The coil end (28) around the axis and the coil former 7
The spacer (26) between the flange (8) and the coil end (28)'r around the axis is the 7 lange (8) of the coil former.
maintained at a certain distance from 9.3 and OX configured as spacer blocks (85, 26) leaving a gap (29) in
(see drawing).

[Brief explanation of the drawing]

The drawing shows the right half of the transformer with some windings cut out. 1... Coil forming body 8... 7 langes (coil 7 langes) 5... Winding tube? ...Winding space 9...
-Next winding @11...Secondary winding 18...〈Yaki 15...Outer protrusion 1
7...Protruding part (rim) 19...Glasstic outer class 2
1... Tangent line 28... End of winding around shaft 25... Spacer block 26... Spacer block 27... #1 groove guide 29... Gap δ
1... Insulating foil.

Claims (1)

[Claims] 1. A coil forming body having an oxide ceramic core and having attached flanges, and a multilayer winding in the winding space between these flanges, one of which is provided on top of the other. In a transformer in which separate windings are insulated from each other by insulating foil and a spacer is provided between the coil terminals on the circumference of the shaft and the flange of the coil formation, said spacer is arranged along the winding cylinder. Transformer characterized in that it is constructed as a spacer block (+5.26) which is distributed over the circumference of the shaft and leaves a gap (29) between the winding end (28) and the flange (8) of the shaft. The transformer according to claim 1, characterized in that the width of the spacer block (25, 2B) is selected according to insulation requirements. ). Claim 8
Transformer 0 as described in either paragraph 1 or paragraph 8