DE297821C

DE297821C -

Info

Publication number: DE297821C
Application number: DENDAT297821D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

PATENTSCHRIFTPATENT LETTERING

- M 297821 -. KLASSE 21 d. GRUPPE- M 297821 -. CLASS 21 d. GROUP

Bei elektrischen Maschinen erweist es sich oft als notwendig, den magnetischen Widerstand entweder des Hauptpolkreises oder des Hilfspolkreises oder beider Kreise nachträglich zu ändern, und zwar kann es sich dabei sowohl um sämtliche Haupt- oder Hilfspole gleichzeitig, oder um einzelne Pole handeln. Man hat die nachträgliche^ Reglung des Luftspaltes — auf eine solche läuft die Anderurig des magnetischen Widerstandes meist hinaus — bisher in den praktisch am häufigsten vorkommenden Fällen dadurch ermöglicht, daß man zwischen die Pole und das Joch passende Eisenbleche einlegte, deren Zahl man je nach Bedarf vermehren oder vermindern konnte, wodurch der Luftspalt zwischen dem betreffenden Pol und dem Anker in der Richtung der magnetischen Kraftlinien jeweils verkleinert oder vergrößertIn the case of electrical machines, it often turns out to be necessary to adjust the magnetic resistance either the main pole circuit or the auxiliary pole circuit or both circles subsequently to change, and it can be either all main or auxiliary poles at the same time, or dealing with individual poles. One has the subsequent regulation of the Air gap - this is what the Anderurig runs on of the magnetic resistance mostly addition - so far in the practically most common Occurring cases made possible by placing between the poles and the Yoke inserted suitable iron sheets, the number of which can be increased or increased as required could decrease, reducing the air gap between the pole in question and the armature in the direction of the magnetic Lines of force each reduced or enlarged

ao wurde.ao was.

Nach der vorliegenden Erfindung wird zum Zweck der Änderung des magnetischen Widerstandes die gesamte Länge des Luftraumes in dem betreffenden magnetischen Kreise nicht verändert, sondern ein Eisenstück, das einen Teil dieses magnetischen Kreises bildet, wird in Richtung des Kraftflusses zwischen zwei Endflächen verschiedener Induktion verstellt.According to the present invention, for the purpose of changing magnetic reluctance the entire length of the air space in the magnetic circuit in question does not change, but a piece of iron, the one Part of this magnetic circuit is in the direction of the flow of force between two Adjusted end faces of different induction.

Beispielsweise wird an einer Stelle des magnetischen Kreises, an welcher sich der Eisenquerschnitt ändert, ein zweiter Luftspalt angebracht (Fig. 1 bis 3). In diesem Luftspalt kann in Richtung der magnetischen Achse ein Eisenstück β bewegt werden, dessen Endquerschnitte den Endflächen g und k an den Unterbrechungsstellen des magnetischen Kreises entsprechen. Nähert man das eiserne Zwischenstück e der größeren Begrenzungsfläche g des Luftspaltes (Fig. 2), so wird der magnetische Widerstand größer, da der Luftspalt mit kleinerem Querschnitt länger wird, während sich derjenige mit größerem Querschnitt verkürzt. Nähert man das Stück e hingegen der kleineren Begrenzungsfläche k des Luftspaltes (Fig. 3), so wird der magnetische Widerstand kleiner, da der Luftspalt mit größerem Querschnitt länger wird.For example, a second air gap is provided at a point in the magnetic circuit at which the iron cross section changes (FIGS. 1 to 3). In this air gap, an iron piece β can be moved in the direction of the magnetic axis, the end cross-sections of which correspond to the end surfaces g and k at the interruption points of the magnetic circuit. If one approaches the iron intermediate piece e of the larger boundary surface g of the air gap (FIG. 2), the magnetic resistance becomes greater, since the air gap becomes longer with a smaller cross section, while that with a larger cross section becomes shorter. If, on the other hand, the piece e approaches the smaller boundary surface k of the air gap (FIG. 3), the magnetic resistance becomes smaller, since the air gap becomes longer with a larger cross section.

Diese Art der Reglung eines magnetischen , -r Kreises hat bei elektrischen Maschinen den Vorteil, daß sie während des Betriebes vorgenommen werden kann.This type of regulation of a magnetic, -r circuit has the advantage that it can be carried out during the operation of electric machines.

Die Fig. 4 bis 8 stellen beispielsweise Ausführungsformen des Erfindungsgegenstandes · dar, wie sie u. a. für den Wendepol einer Gleichstrommaschine in Frage kommen. In Fig. 4 ist entsprechend den Fig. 1 bis 3 am Fuß des Wendepols w zwischen dem Polkörper w und dem Joch / ein Luftraum I vorgesehen, in welchem das Zwischenstück e in der Flußrichtung verschoben werden kann. Die Verschiedenheit der Induktion oberhalb und unterhalb des Zwischenstücks β folgt aus der verschiedenen Größe der Endquerschnitte g und k. Nach Fig. 5 wird kein besonderes Zwischenstück verwendet, sondern der ganze Wendepol w wird verstellt, derart, daß die Summe der Luftspalte, I zwischen Pol w und Joch / einerseits, und d zwischen Pol w undFIGS. 4 to 8 show, for example, embodiments of the subject matter of the invention, such as are possible, among other things, for the reversing pole of a DC machine. In Fig. 4, in accordance with FIGS. 1 to 3, at the foot of the turning pole w between the pole body w and the yoke / an air space I is provided, in which the intermediate piece e can be displaced in the flow direction. The difference in induction above and below the intermediate piece β results from the different sizes of the end cross-sections g and k. According to FIG. 5, no special intermediate piece is used, but the entire reversing pole w is adjusted in such a way that the sum of the air gaps, I between pole w and yoke / on the one hand, and d between pole w and

Claims

Anchor α on the other hand, I + d, remains constant. Fig. 6 shows how the regulation can also come about without a difference in the end face size. Because here the difference in induction at the end faces g and k of the air gap I is due to their position relative to the reversible sink s. While the end g lies at the end of the coil s, the end k_ is in the middle ίο of the same; at k the scatter is therefore much smaller than at g, so there is also greater induction at k than at g. 7 and 8 indicate in what way, for. B. the structural arrangement of FIG. 4 can be made practically in a machine. The reversing pole w itself is attached to the yoke j by means of the screws m and a non-magnetic spacer tube r, while the magnetizable intermediate piece e can be moved from the outside of the machine within the air space I (FIG. 4) by means of the adjusting screws η. Touching the current-carrying windings and connecting lines as well as accidentally touching surrounding parts is excluded. The possibility of adjustment during operation of the machine is particularly advantageous for the test field engineer, who can now observe its effect with the adjustment and thus has to spend much less time adjusting the machine than before, when he first used the machine for this purpose had to put it down, take it apart and then put it back into operation and load it. In the figures, the boundary surfaces of the movable intermediate piece and the opposing pole surfaces are shown as flat surfaces. It is of course possible to give the intermediate piece any desired wedge-shaped, rounded or angular end face and to adapt the opposite pole faces to this shape. Furthermore, instead of one movable intermediate piece, several can be arranged, which can be moved together or individually. One end cross-section of the movable intermediate piece can be larger than that of the larger iron surface opposite it. 50 sponsors τ claims:

1. Procedure for regulating the magnetic resistance of magnetic circuits, which are interrupted in places by air gaps, especially for electrical ones Machines, characterized in that an iron piece within an air gap in the direction of the flow of force between two end faces of different magnetic induction is moved without affecting the total length of the air space in the relevant magnetic circuits changes.

2. Device for performing the method according to claim 1, characterized in that that the two end faces, between which the movable iron piece can be adjusted, of different sizes are.

3.. Device according to Claim 2, characterized in that the entire reversing pole of an electrical machine between

■ see the end faces of different magnetic Induction forms movable iron piece.,

4. Device for performing the method according to claim 1 in reversing pole machines, characterized in that a part of the reversing pole core is radially adjustable within the reversing coil, and that the two end faces between which it can be moved, on the one hand for example in the middle, on the other hand, about one end "of the reversing coil.

1 sheet of drawings.