Inductor devices – Windings – Having conductor of particular shape
Patent
1994-09-26
1997-01-28
Gellner, Michael L.
Inductor devices
Windings
Having conductor of particular shape
336 60, 336205, 336207, 336208, 335300, H01F 2728
Patent
active
055981372
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a coil, particularly for a high-voltage transformer, in which a first electroconductive winding is designed as a coil former.
DE-OS 39 17 212 discloses a transformer coil in which a wire winding is applied to a winding element of non-magnetic metal. The winding element is structured as a sleeve having a slit that passes axially through it. The winding start of the coil is electrically connected with the winding element, where a front end projection of the winding element serves as the electrical connection for the winding start of the coil. This winding arrangement is preferably cast into a cast mass, where a second connecting element cast into this is electrically connected with the winding end of the coil. This solution is only suitable for low-output transformers, e.g., for small transformers.
DE 27 36 092 A1 discloses a coil for a high-tension transformer in which a first electroconductive winding has a first connecting element. A second connecting element is attached to the first connecting element via an insulating portion. The second connecting element is also connected to a second electroconductive wiring that is insulated with respect to the first winding. Here, the windings are produced from rigid circuit boards which are each self-supporting. This type of coil and winding structure is only suitable for such high currents at which the necessary conductor material is already self-supporting by itself, due to the conductor cross-section.
Patent Abstracts of Japan, Vol. 1, No. 133 (E-77) (6162), Nov. 4, 1977, JP-A-52 068 921, discloses an internal connection part for a winding which is inserted into an axial slit of an insulating coil former as an intermediate piece.
Despite these known transformers there is still a need for a high voltage transformer with a winding designed as a coil former.
SUMMARY OF THE INVENTION
The present invention provides a coil that is suitable for use at higher output and also provides a means for forming a suitable coil former.
The coil of the present invention is particularly Suited to a high-tension transformer having two electroconductive windings insulated from one another. The first winding has a first connecting element. A second connecting element is attached to the connecting element via an insulating member. The second connecting element is electrically connected to the second electroconductive wiring. The first winding is structured as a cylinder with an axial slit into which an insulating part is inserted. The second winding is carried by the first winding in an insulated manner. At high output, high forces occur between the connecting elements of the coil, which result in repulsion of the connecting elements. With the embodiment according to the present invention, a coil is provided in which the coil former and the connecting elements form a rigid component. In this way, a special coil former can be eliminated, since the first winding is self-supporting.
It is particularly advantageous if the coil is formed of only a few windings, such as in high-power coils for smelting ovens, for example.
The connecting elements are preferably attached to the windings at a frontal end thereof. In this way, the coil obtains a compact structure. The windings of the coil can be arranged radially between two connecting elements. In this manner, an advantageous mechanical arrangement is provided in which the repulsion forces between the connection elements or the outgoing lines can be better controlled.
In advantageous manner, the windings of the coil are wound from a strip conductor. In this way, uniform force and current distribution over the entire coil width is provided. The first winding of the coil, structured as a cylinder with an axial slit is of a non-magnetic material. The insulating part inserted into the slit increases the mechanical strength of the coil. An additional increase can be achieved if the insulating piece has teeth or grooves which attach it in the slit.
In a preferred embodiment, the coil i
REFERENCES:
patent: 2355560 (1944-08-01), Roberds
patent: 2863130 (1958-12-01), Gray et al.
patent: 2963669 (1960-12-01), Salisbury
Alber Friedrich
Dedelmahr Rudolf
Kromer Siegfried
Schott Hans
Weiss Siegfried
Gellner Michael L.
Lord G. R.
Siemens Aktiengesellschaft
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