Process and device for producing a transformer winding

Winding – tensioning – or guiding – Composite article winding – By rotating core

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Details

29605, 140 921, H02K 1504

Patent

active

055844383

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
The present invention relates to a process and apparatus for producing a winding for transformers. More particularly, the present invention relates to a process for producing a transformer winding from angularly profiled (rectangularly cross-sectioned) wires, wherein the profiled wires are brought together in a twist head and twisted to form a twisted conductor. The individual wires are brought together to form two adjacent groups of wires, each group including two flat sides. The individual wires positioned at the flat sides, i.e., the respective top and bottom conductors, of each of the adjacent groups extend obliquely in opposite directions so as to switch sides through an offset on the narrow sides of the cross section. Concurrently, the top conductor of group 1 extends over to group 2 to become the top conductor of group 2 (the previous top conductor of group 2 is now second from the top), and the bottom conductor of group 2 extends over to group 1 to become the bottom conductor of group 1 (the previous bottom conductor of group 1 is now second from the bottom). Thus, the top two (or bottom two) individual wires, which are disposed on top of each other (before twisting) in their cross section are disposed next to each other (after twisting), and are spaced from each other if necessary. The resulting twisted conductor is enclosed in insulation in at least sectionally.
2. Description of Background and Relevant Information
A device for producing twisted conductors is disclosed in EP-A 408,832. The production of a twisted conductor is also disclosed in principle.
In producing a winding for a transformer, conventionally, the twisted conductor has been produced at a first station and the winding for the transformer has been produced at another station. In performing such an operation, the twisted conductor is therefore wound on a transport drum while at the first station. In most cases, the transport drum has a considerably smaller diameter than the core diameter of the transformer winding. Accordingly, in taking the twisted wire from the transport drum and then producing the winding at another station, deformation of the twisted conductor is unnecessarily done twice.
A method for rolling a conductor is disclosed in U.S. Pat. No. 3,747,205. Such method of rolling up conductors is performed in connection with pancake coils which are wound on a core with a rectangular cross section. This structure is intended to prevent displacement or slipping of the insulation which occurs with rectangular cores.


SUMMARY OF THE INVENTION

It is an object of the present invention to provide a process for producing a transformer winding using angularly profiled wires such as those described above. It is an object of the invention to provide such a process which further improves the quality of the resulting winding but allows such a winding to be produced in an economical fashion. The process of the present invention is distinguished in that a twisted conductor is wound on a support cylinder to form to the transformer winding and the transformer winding is placed on the core of the transformer. In addition, the step of twisting the conductor is controlled by controlling the twist head in accordance with its actual winding diameter.
By utilizing the process of the present invention, it is possible to produce a transformer winding without performing the intermediate step of rolling up the twisted conductor, before again winding the twisted conductor in the form of a transformer winding. Thus, two deformations of the finished twisted conductor are no longer performed. In previous and conventional systems, where the twisted conductor is rolled twice resulting in unnecessary deformations, the paper insulation becomes bunched up, leading to a constriction of the cooling conduits in the finished transformer. This causes a diminished circulation of the coolant in the transformer.
In order to produce a transformer winding to exact measurements, the position of a twisted conductor

REFERENCES:
patent: 2249509 (1941-07-01), Welch, Jr. et al.
patent: 3518755 (1970-07-01), Olson
patent: 3747205 (1973-07-01), Moore
patent: 4337567 (1982-07-01), Lugosi et al.
patent: 4523447 (1985-06-01), Sticht et al.
patent: 5114517 (1992-05-01), Riggingale et al.
patent: 5187859 (1993-02-01), Heim
patent: 5331800 (1994-07-01), Schaumburg et al.

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