Патент USA US2116404код для вставки
May 3, 1933~ v. M. MONTSINGEÉ 2,116,404 ELECTR I_CAL INDUCTION AP PARÀTUS File-d March 23, 193'? _ bg M _ _His Abborneg. ~ L 2,116,404 Patented May' 3, 1938 UNITED _' sTATEs PATENT oFFicE 2,116,404 ELEc'rnlcAL nvnUo'rloN APPARATUS Vincent M. Montainger, Pittsfield, Mass., assigner . to General Electric Company, a corporation of New York Application March 2_3, 1937, serial No. 132,528 s claims. (c1. 11s-362) 'I‘he' insulating cylinders Il_,and i5 are imperio ’I'he invention relates to electrical induction ap rate and are formed with end flanges il and il paratus, such as a transformer or reactor, where in a winding leg of a magnetic core is surrounded respectively which provide insulation between the ends of the winding and the adjacent yokes` by a winding or windings. The invention is fur 5 thermore particularly concerned with apparatus I9" of the magnetic core. -Suitable spacing strips , having high voltage windings of the disk coil type. 20 are provided between the insulating cylinders Such a high voltage winding must be effectively i4 and I5 and between their flanges i'l and il. insulated from the winding >leg of the core and from any low voltage winding which it may sur l0 round, and suitable provision must be made for dissipating heat from the winding to prevent ex 'y cessive temperatures. The necessary insulation is usually provided by one or more insulating cyl inders between the high voltage windings and the 15 winding leg of the magnetic core. The disk-coils i forming the high voltage winding are usually - spaced from each other and from the insulating In accordance with the inventionv the high voltage winding I2 includes. a plurality of spaced disk coils 2| with their inner Iedges in -contact with the outer surface of the insulating cylinder i4 which they surround. There is thus no space for cooling liquid between thesedisk coils 2| and their insulating cylinder il so that if any corona ' 'starts at all it must startin the solid insulating material of the insulating cylinder Il instead of cylinder which they surround to provide passage in an insulating liquid and it is well known that corona will start much more easily in' liquid- in corona will ñrst appear and breakdown will first illm of insulating liquid is much higher in`pro- ' ways for an insulating and cooling liquid in whichv sulation than in solid insulation. It is, however, theapparatus is immersed. It has been found not necessary that'the disk coils 2| fit so tightly 20 2 that if the voltage_of the winding in such an ar against the insulating cylinder Il -as to exclude ` rangement is increased to the point of breakdown, all liquid because the dielectric strength of a thin take place along the inner edges of thedisk coils N) D where they are spaced a short distance from the portion to its thickness than is that of a thicker layer of such liquid. ' ' - l insulating cylinder. - The general object of the invention is to pro vide an improved arrangement of high voltage winding with its insulating cylinder wherein a '30 much higher voltage is necessary before corona and breakdown will occur. The invention will be better `understood from the following description taken in connection with >the accompanying drawing in which Fig. 1 is a w Gl simple partially diagrammatic view of a core type transformer having windings which may be arranged in accordance with the invention; Fig. 2 is an enlarged view of a portion of the trans . former, the windings in this view being shown The disk coils 2i are maintained in spaced re lation by U-shaped spacers 22 and simple spac ing strips 23. The winding I2 must of 'course be heldin place‘under considerable pressure and it is therefore necessary that the spacers 22 and 23 be held in alinement to avoid distortion of the individual coils 2|. To assure such alinement of the spacers 22 and 23, the insulating cylinder I4 is formed with longitudinal grooves 24 in its outer surface and the inner ends- of the spacers extend 35 and fit into these grooves. The spacers 22 extend along opposite faces of the coils 2| and around the inner edges where they iit into the grooves 2l. The spacing strips 23 are disposed between 40 40 partly in section; Fig. 3 is a sectional view on the the U-shaped spacers 22 and their inner ends also line 2_3 of F18. 2: Fig. 4 shows a detail'on the. extend into the grooves 24. The spacing strips line 4-4- of Fig. 2. and Fig. 5 shows a modified 22 may of course be of any desired thickness de pending upon the desired spacing of the coils 2i form of the invention. Y ,Like'reference characters indicate similar parts 45 of thediiferent figures of the drawing. ' ' ' ' The transformer shown in the drawing includes or they may be _omitted if not needed. The insulating liquid in which the transformer 45 may be immersed will have free access to the a magnetic core il having two winding legs il upper and lower faces and to the outer edges'of y »surroundedby high voltage windings I2 and low each of the coils 2l so as to absorb heat from> ` voltage windings-i2, each low voltage winding I2 -these coils to improve the circulation of the so being next to its winding leg Il and surrounded liquid. To improve the circulation of the by its high voltagewinding I2. Each high-voltage liquid so that it may carry away the heat more winding i2 is insulated from its low voltage wind ’ rapidly, alternate coils are formed in two con ing il by two concentric insulating cylinders Il centric spaced portions so that ducts 2l extend between the upper and lower surfaces of these al and Il which are spaced from each other to pro u lvide a duct or passageway It for a cooling liquid. ternate coils. The cooling liquid may thus flow w 2,116,404 into the . space below each of these ducts 2l, through the duct and out of the winding through the space above the duct. These ducts 2l should be as near as possible to the inner edges of the coils so that the liquid will ilow in contact with as much as possible of the surfaces ofthe coils. What I claim as new and desire to secure by Letters Patent of the United States, is, l. Electrical induction apparatus including an insulating cylinder with longitudinal grooves in its surface, and a plurality of spaced disk coils in contact- with said surface, alternate coils hav ing ducts near said cylinder and the other coils The liquid flows 'of course not only along the surfaces of those coils which are provided with being solid. the ducts 25 but also along the surfaces of the 2. Electrical induction apparatus including an 10 other coils not so provided with ducts and which ' insulating vcylinder with longitudinal grooves in are therefore solid, and thus the heat is dis its outer surface, and spaced disk coils surround sipated effectively from all of the coils even ing said cylinder with their inner edges in con though the cooling liquid is substantially ex-I, tact with the cylinder, alternate coils having eluded from the inner edges of the coils next to y ducts near their inner edges, and the other coils thei:ieriiisula'ting cylinder upon which they are sup . por In the modified form of the invention shown in Fig. 5, alternate solid coils are wound. tightly over the insulating cylinder il and with ~their being solid. 3. Electrical induction apparatus including an insulating cylinder with longitudinal grooves in its outer surface, spaced disk coils surrounding said cylinder with their inner edges in contact 20 inner edges in contact therewith -T’he ducts 2l _ with the cylinder, and spacers between said coils associated with the other coils, however, are provided by. spacing the inner edges of the other coils from the cylinder il instead of forming these ducts through these coils near their inner 25 edges. 'I'he spacing of the inner edges of alter nate coils from the cylinder Il to provide the ducts ZI is permissible because of the i'act'that the adjacent coils are in contact with the in 30 sulating cylinder and definitely establish the po tential distribution along the cylinder` at .fre quent intervals so that the voltage across the ducts 25 will not be sufilcient to produce corona. 'I'he invention has been explained by describ 35 ing and illustrating a particular transformer con structed in accordance therewith, but it will be apparent that changes may be made without departing from the spirit of the invention and the scope of the appended claims. and extending into said grooves, alternate coils having ducts near their inner edges, and the other coils being solid. 4. Electrical induction apparatus including an imperforate insulating cylinder, a plurality of 25 spaced disk coils, alternate coils being solid and each having an edge in contact with the cylinder. there being a duct associated with each ofthe other coils and connecting the adjacent spaces near saidcylinder. 80 5. Electrical induction apparatus including an imperforate insulating cylinder, a plurality of spaced disk coils surrounding said cylinder, alter nate coils being solid and each having its inner edge in contact with the cylinder, there being a duct associated with each of the other coils and connecting the adjacent spaces near said _cylin der. VINCENT M. MONTBINGER.