DE1019362B - Two-pole medium-frequency supply line, especially for inductive heating systems - Google Patents

Description

The invention relates to a two-pole medium frequency feed line with means to prevent fields around the line and for even current distribution over the line cross-section.

In medium-frequency technology, power lines, especially between generator and consumer, are concentric cables are used, which should be avoided by their structure that outside magnetic fields arise. These fields would cause unwanted losses and warming in occur in the lines of neighboring parts. Another known solution uses four-core cables used, which are switched crosswise to reduce the fields. The disadvantage of this Facilities can be seen in the fact that the currents unevenly on the inside or each other facing sides are distributed and the cable production is relatively expensive. With another known device rails are used, which are guided as close together as possible. Even with this device, however, the currents only flow on the facing sides of the Rails, so that the cross-section of the rails is only weakly exploited.

The invention is a two-pole medium frequency feed line based on which these disadvantages can largely be avoided with a simple structure. The two-pole medium-frequency feed line according to the invention also consists of a plurality of parallel ones Cable strands, and they are also a means of preventing fields around the cable and provided for even current distribution over the cross section.

According to the invention, however, the cable strands have an edgewise profile and are arranged in relation to one another in such a way that that their profiles form a star, with each strand at least one strand of opposite Potential is adjacent. For a simpler two-pole medium-frequency feed line, especially for inductive

Heating systems

Applicant:

Sienese candy works

Corporation,

Berlin and Erlangen,

Erlangen, Werner-von-Siemens-Str. 50

Dipl.-Ing. Wilhelm Mosch, Erlangen,
has been named as the inventor

mechanical fastening, the cable strands can be arranged in the manner of a cross bar will. To simplify the subject matter of the invention, two can each with one another Cable strands enclosing right angles are combined to form an angle profile rail.

The feed line according to the invention is explained in more detail with reference to the drawing. Fig. 1 shows a Line in which eight rails 1 to 8 are arranged in the cross section of the line in the form of a cross bar are. Here, the individual rails can be used alternately for a better reduction of the fields during one cycle are at the opposite potential as shown in the drawing, i. H. Η— -I— -1— Η Potentials

or the rails can simply have the sequence —l · H— ~ + H—.

Another possibility is shown in Fig. 2, in which there are two adjacent rails 11, 12; 13, 14; 15, 16; 17, 18 are combined to form an angle profile. The circuit then corresponds to that of the discussion of FIG. 1 last given sequence.

Of course, the possible embodiments of the feed line according to the invention are not available the illustrated embodiments are limited. For example, the individual rails can be star-shaped be arranged at the same angle to each other. It is also possible to have more or less than eight Provide rails.

Claims (3)

Claims. 1. Two-pole medium-frequency feed line made up of a plurality of parallel cable strands, in particular for inductive heating systems, characterized in that the cable strands Have edgewise profile and are arranged to each other that their profiles form a star and that each strand is adjacent to at least one strand of opposite potential. 2. Feed line according to claim 1, characterized in that eight cable strands according to Art a bar cross are arranged. 3. Feed line according to claim 1 or 2, characterized in that in each case two adjacent Cable strands are combined to form a rail with an angle profile. Considered publications:
German patent specification No. 935 265. 1 sheet of drawings