DE281397C

DE281397C -

Info

Publication number: DE281397C
Application number: DENDAT281397D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

PATENTSCHRIFTPATENT LETTERING

- JIfS 281397 ~ KLASSE 21 a. GRUPPE - JIfS 281397 ~ CLASS 21 a. GROUP

HANS BOAS in BERLIN.HANS BOAS in BERLIN.

Resonanztransformator. Patentiert im Deutschen Reiche vom 5. Mai 1914 ab. Resonance transformer. Patented in the German Empire on May 5, 1914.

In der Patentschrift 211517 ist ein Resonanztransformator mit veränderlicher Kopplung beschrieben, dessen wesentliches Merkmal darin beruht, daß die Primärspulen außerhalb der Sekundärspule verschiebbar angeordnet sind, so daß der Apparat verschieden feste Kopplungen zwischen Primär- und Sekundärarmatur herbeizuführen gestattet. Die Verringerung der Kopplung zwischen den beiden Systemen tritt dadurch ein, daß eine magnetische Streuung zwischen den Spulensystemen auftritt, derart, daß Streukraftlinien ein magnetisches Kreissystem um die Sekundärspule herum und um die Primärspulen herum bilden. Es treten also Kraftlinien senkrecht zum Eisenkern zwischen den Spulen heraus, die in ihrer Stärke periodisch veränderlich sind, wodurch es beispielsweise nicht möglich ist, den Apparat außen durch ein Gehäuse aus leitendem Material abzuschätzen. Es werden sonst in dem Gehäuse infolge der veränderlichen Streukraftlinien Wirbelströme induziert, die das Gehäuse erwärmen und eine Dämpfung in bezug auf die Arbeit der Spulensysteme aufeinander ausüben. Eine solche magnetische Streuung wird immer dann eintreten, wenn auf demselben Eisenkreis entweder alle Windungen oder ein Teil der Windungen außerhalb der Sekundärspule liegen.In the patent 211517 is a resonance transformer described with variable coupling, the essential feature of which is that the primary coils are slidably arranged outside the secondary coil, so that the apparatus is different to bring about firm couplings between the primary and secondary fittings. the Reduction of the coupling between the two systems occurs because a magnetic Scattering between the coil systems occurs in such a way that stray lines of force create a magnetic circular system around the secondary coil around and around the primary coils. So there are lines of force perpendicular to the iron core between the coils that are periodically variable in their strength, which means that it is not, for example it is possible to assess the apparatus externally through a housing made of conductive material. Otherwise there will be eddy currents in the housing as a result of the variable stray force lines induces that heat the housing and dampen the work of the coil systems exercise on each other. Such magnetic scattering will always occur if on the same iron circle either all turns or part of the turns lie outside the secondary coil.

Man kann z. B. einen solchen Resonanztransformator dadurch herstellen, daß man einen geschlossenen Eisenkreis verwendet, auf dem einen Schenkel die Sekundärwicklung, auf dem anderen die Primärwicklung anordnet.You can z. B. produce such a resonance transformer by having one closed iron circuit, with the secondary winding on one leg the other arranges the primary winding.

Alsdann erhält man auch eine lose Kopplung. Die magnetischen Streukraftlinien treten bei dieser Anordnung aus den parallel liegenden, die Spulenschenkel verbindenden Jochen aus.. Auch ein solcher Transformator darf weder leitende, aus Massivmetall hergestellte Armatüren auf den Jochen tragen, noch darf er in ein Metallgehäuse eingebaut werden, weil auch hier die Wirbelströme starke und störende Erwärmungen zur Folge haben würden. Diese durch die Wirbelströme hervorgerufenen Erwärmungen nehmen, wie die theoretische Betrachtung lehrt, mit dem Quadrat der Periodenzahl zu.Then you also get a loose coupling. The stray magnetic lines of force join this arrangement from the parallel yokes connecting the coil legs. Even such a transformer must not have conductive armature doors made of solid metal on the yokes, it may still be built into a metal housing, because here too the eddy currents are strong and would cause disruptive warming. These caused by the eddy currents As theoretical considerations show, warming increases with the square of the number of periods.

Ein anderes vielfach angewandtes System der Transformation unter Resonanz und der Verminderung der Kopplung besteht darin, daß man der Primärwindung eines in. sich sehr fest gekoppelten Transformators eine Drosselspule mit passender Selbstinduktion vorschaltet. Die Koppelfestigkeit ist in diesem Falle durch das Verhältnis der im Transformator mit unendlich fester Kopplung liegenden Selbstinduktion zu der Summe der gesamten im Primärsystem liegenden Selbstinduktion gegeben. Dieses System erfordert zwei getrennte Apparate. In folgendem soll nun eine neue Ausführungsform eines Transformators beschrieben werden, welche einen fest gekoppelten Transformator mit einer Vorschaltdrosselspule in einem Jochstück derartig vereinigt, daß ein einzelner nach außen hin nicht streuender Apparat daraus entsteht. Das Wesentliche dieser neuen Ausführungsform besteht darin, daß die beiden die Spulen tragenden Eisenteile so zueinander angeordnet sind, daß eine Induktion des einen Teiles auf den anderen unmöglich ist. Dazu · muß derAnother widely used system of transformation under resonance and the Reduction of the coupling consists in the fact that the primary winding is one in itself very tightly coupled transformer has a choke coil with suitable self-induction upstream. The coupling strength in this case is determined by the ratio in the transformer with infinitely tight coupling lying self-induction to the sum of the total self-induction lying in the primary system. This system requires two separate devices. The following is a new embodiment of a transformer be described, which has a tightly coupled transformer with a ballast inductor in a yoke piece of this type united so that a single outwardly non-scattering apparatus arises from it. The essence of this new embodiment is that the two are the coils supporting iron parts are arranged to each other that an induction of one part impossible for the others. For this · must the

Claims

one leg form a kind of bridge to the other. Such a new transformer is shown in the figure. The yoke is either punched out of the solid or formed by folding in the usual way. The arrangement can be made, for example, that the primary coil P is arranged on the upper horizontal leg of the yoke, concentrically, with the secondary coil 5 above it. that is, with an infinitely strong coupling. The choke coil, which causes the reduction of the coupling and may be designated by D, is arranged on the lower vertical central limb, as shown in the drawing, so that the flow of force lines emerging from it divides upwards and downwards into two parts. Take it now. indicates that the force fields generated by these coils are as indicated by the arrows, i.e. H. that the north magnetism from the upper limb goes downwards through the right yoke, so if the north magnetism in the lower vertical limb is directed upwards, the magnetic lines of force emerging from it will be directed against the descending ones from the upper limb. But since they bend downwards as a result of the circular closure, they are directed in the same way as the upper descending lines of force. The flow then passes through the lower right half of the yoke, rises through the central limb, turns to the left on the central connecting yoke and rises in the left main yoke to re-enter the coil. The course of the lines of force must always remain the same symmetrically, however the fields of the two coils may be in relation to one another at the moment. The main field from the upper leg is allowed to circulate freely through the iron system without resistance at any moment. There is no outward scattering because there are short magnetic circuits everywhere. The coupling strength of this transformer is only dependent on the ratio of the self-induction on the main primary coil P and the self-induction of the choke coil located on the lower middle limb!). Of course, the whole system can be reversed in such a way that the coil system of the transformer is wound on the lower central yoke, and that the choke coil is arranged on the upper horizontal leg instead of the transformer. As a result, there is no change in the behavior of the transformer in a magnetic relationship. A transformer according to this new design has the advantage of being a unitary apparatus and yet, in exactly the same way as a tightly coupled transformer, of having no external magnetic scattering, an advantage that could not be achieved by the previously known constructions. The change in coupling strength can be achieved by varying the number of turns on the transformer coil and turns on the series reactor that can be switched off. Pa τ ε ν τ - A ν s ρ rü c.h ε:

1. Resonance transformer, characterized by the arrangement of a fixed in itself coupled transforming coil system and a series reactor used to reduce the coupling on the same iron yoke in such a way that the magnetic lines of force from both coil systems are directed perpendicular to each other, as a result, no influence exert on each other so that the apparatus has no external magnetic scattering.

2 embodiment of a transformer according to claim 1 with comparable 'änderlicher coupling, which is characterized ^ he _go sufficient that both the primary windings of the transformation coil or the coils of the choke coil or both receive a different number of turns can be switched off at will at the same time.

1 sheet of drawings.