US1154132A - High-tension transformer. - Google Patents

Description

Patemed Sept. 21, 11115.

C. SCHRADER.

HIGH TENSION TRANSFORMER.

APPLICATION FILED 0502,1910.

1% amm UNITED STATES Pars GFFICE.

CARL SCHRADER, 01S HALENSEE, NEAR BERLIN. GERMANY, ASSIGNOR TO SIEMENS &

HALSKE, A. 5%., OF BERLIN. GERMANY, A CORPORATION OF GERMANY.

HIGH-TENSION TRANSFORMER.

Specification of Letters Patent.

Patented Sept. 21. iti'i.

Application filed December 2. 1910. Serial No. 595.277.

Be it known that I. Cfia Scnnlwnn, a subject of the German Emperor. and residing at Halensee. near Berlin. Germany. have invented certain new and useful Improvements in Higlr-Ter1sion 'iranst'ormers. of which the following is a specification.

My invention relates to transformers for current of high tension.v and a primary object is to provide such a transformer which substantially consists of only a few turns of the primary conductor. an iron core, carry ing the secondary winding. surrounding the primary conductor. and a suitable insulator interposed between the iron core and the conductor. \Vhen employing such transformers for very high voltages for example over 30,000 volts, various disadvantages are obseryed which particularly result from the undue increase in the size of the insulator construction surrounding; the primary conductor. both in length and in thickness, in order to prevent the current jumping across from the ends of the primary conductor to he row tension windingsurrounding the I central portion of the insulator. The detail construction of such insulators per se is known in the art. Also due to such increase in insulator size the magnetic connection between the primary and secondary windings is insutlicient owing to the great distance of the iron body from the former winding. this being more apparent in such transformers because of the very small strength of current traversingthe primary conductor at such high voltages. Such devices satisfy only very small demands with regard to both the constancy of the ratio of transiorination and also to efects due to displacement of phase between the primary and secondary currents. and consequently are quite unsuitable for purposes requiring great exactitude. for exainp e for connecting to watti-ncters of various kinds. Now according to my inventon I remedy these defects in an exceedgly simple manner by employing an insulator wliich has heretofore been employed for collhectors. This insulator comprises a plurality of concentric insulating cylindes which are each shorter than the next inner one and are separated by layers of metal.

These tlomlucting layers cause the distribu'' tion or voltage on the free surfac; and that Within the dielectricto suit one another. By suitably selecting the distance between the Figs. 3 and l, the cu .otherwisc customary in such transformers.

my transformer is not only materially SlllilllLl and cheaper than the well-known forms of such transformers. but it possesses. above all. materially bcttcr electrical properties. as it is possible. to place the iron core carrying the secondary winding in immc diate proximity to the primary conductor surrounded by it.

Several illustrative embmlimcnts of my invention are represented by way of example in the accompanying drawing. wherein:

Figures 1 and 2 are elevation and top plan view. respectively. showing a form comprising a primary winding composed-0t several strands connected in series and pass ing through two insulators. and Figs. 3 and l are like views. respectively.

form in which the secondary winding is'ai ranged on both the insulators.

In these illustrative cmboduncnts of my invention the primary conductor comprises i a number of wires a insulated from one another. connected in series and arranged in two parallel insulating sleeves each compr sing a plurality of concentric insulating cylinders b, which are preferably graduated outwardly in length and are separated from each other by layers o'l metal c.

showing a The laminated annular iron core (I on whiclr-T.

the secondary windin c is )lacc l suii'roumls thccentral portion of....tlre sleeve. in the illustration shown in Figs. Tamil? only one. of the sleeves is providcd with iron't'aore carrying thcseco ulary winding/c.

in the illustrat-i embodiment shown in ing secondary current. To this end. a second iron core having a secondary winding e. is provided on the second insulating slcevc. The two secondary windings v rrcnt passing through the second sleeve is also utilized for produce and c are no J8 .y invent L'zompaz'ea with vis" In 2! nrmc- .1" rent 1 incling; ca ies :meam

5 wins- .11""

wzmsformm:

Q0 Ti combl ion ding' cempnsing' a coil. nugnbqr two i" Wit 4113mm! have b1 Alt mentionel sleeve,

1g Flee s being disposed 'm'xtia ily 7 parallel and more surmnnur my bsztwcs 1 it dry

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