DE2133003A1 - Disc runner with lamellar ladders - Google Patents

Description

Applicant: INSTITUTUL DE CEKCETARI SI PROIECTARI PENTRU INDUSTRIA ELECTRüTEHNICA

Bucharest, Boulv.T-Vladimirescu, no.45-47, Romania

"Disc rotor with lamellar conductors"

The invention relates to a disc rotor for direct current machines with conductors obtained by punching and separate collector.

Disc rotors are known which consist of printed conductors and which have a collector made of lamellas provided in the extension of the ladder. These Rotors have the disadvantage that the collector has a short service life because of the slight wear.

There are disc rotors known whose head consists of a or several copper foils of the same thickness are punched and their brushes touch these conductors directly. Even these rotors have the disadvantage that they have a short service life due to the rapid wear of the collector

With the invention, this disadvantage is to be eliminated; this is achieved according to the invention in that the

109885/1224

• 2-

Collector is formed by lamellas, which are simultaneously with the conductors and in the extension of the same by punching are made from a copper foil, which foil is thicker than the foils that make up the other of the brushes Not striped conductors are punched out.

In the following an embodiment of the invention is shown with reference to the drawing.

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Fig. 1 is a partial view of the coil winding of the assembled disc armature.

Fig. 2 front view of a conductor layer made from a single stamped foil.

According to the invention, the runner is composed of an insulating film, on both sides of which are made of copper or Aluminum foil stamped conductors (2, 3) are glued on; the ladder 2 form part of the Lauferwieklung and the Conductors 3, which form the other part of the rotor winding, have collector lamellae 4 in their extension.

The conductors 3 on one side of the runners are made of a thicker copper foil and the conductors 2 on the other side, copper or aluminum foil will be more normal Thickness made. The conductors 3 are connected between the conductors.

According to the invention are for a production method of

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Runner punched three conductor foils of normal thickness with a die, which is provided with a stamp in the shape of the dashed zone a (Figure 2) and a conductor foil with the same die, but made of a material of greater thickness. Two of the punched conductor sheets of normal thickness are glued to both sides of the insulating sheet 1 so that the ends of the conductors correspond to the spring d (including c).

The ensemble created in this way is now punched on the circles indicated in the drawing with 1) and c, whereby the ladder is formed; the ends of the conductors of circle c are welded.

The third die cut film for normal thickness conductors and the punched foils for conductors of greater thickness are initially covered with insulating varnish in the / one between lines b and d, in the case of keeping a minimum distance between the ladders, and are glued to the same insulating sheet 1; the conductors 3 of these foils are between the already glued Conductor 2 switched. The ensemble formed is then punched at circles b and d and the ends of the ladder that face each other are welded to both circle b and el.

The conductor punched according to the invention have in their active zone in which they intersect the magnetic field lines, i'ie shape of an involute.

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The pancake according to the invention has the following advantages:

- it allows the creation of a collector with lamellas
larger cross-section, which increases the service life of the engine;

- the technological process used is simple and the punch used for punching is robust and can withstand
Ease to run;

- the technological process used allows the entire conductor to be punched with a single die, resulting in increased accuracy and, therefore, in the manufacture of identical ones
Head leads.

109885/1224

Claims (3)

Patent claims: (l.) Disc rotor with two lamellar conductor layers, which are separated by an insulating layer (l) and by gluing two or more stamped metal foils onto them
Insulating layer were obtained, characterized in that the collector consists of larvae (4), which extend to the center of the
Disc can be obtained by simultaneously punching with the corresponding conductors (3) from a film that is thicker than the other films. 2. Disc armature according to claim 1, characterized in that the two conductor layers
of the runner made of ladders (3) with collector lamellas (4)
interposed with conductors (2) without collector lamellas. 3. Disc rotor according to claims 1 and 2, since d u r el characterized in that the stamped conductors have the shape of an involute in their active zone. 109885/1224