US783397A - Winding for dynamo-electric machines. - Google Patents

Description

PATENTED FEB. 21, 1905. B. A. BEHREND & E. 0. WRIGHT.

WINDING FOR DYNAMO ELECTRIC MACHINES.

APPLICATION FILED NOV. 6, 1903.

2 sumssum 1.

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Bernard A-Behrend. Edwin CIA/fight Mtness 96 Attorney No. 783,397. I PATENTED FEB. 21, 1905. B. A. BEHREND & E. G. WRIGHT.

WINDING FOR DYNAMO ELECTRIC MACHINES.

urmoumn FILED NOV. 6, 1903.

2 SHEETS-SHEET 2.

' Inventors Wu Bernard A-Behrendmasses Edwin C Miyfit. W y

A l'zorney No. 783,397. Patented February 21, 1905.

UNITED STATES PATENT OEEIcE.

BERNARD A. BEHREND, OF NORIVOOD, OHIO. AND EDIVIN C. \VRIGrHI. OF NEWPORT, KENTUCKY, ASSIGNORS, BY MESNE ASSIGNMENTS, TO THE BULLOCK ELECTRIC COMPANY, A CORPORATION OF OHIO.

WINDING FOR DYNAMO-ELECTRIO MACHINES.

SPECIFICATION forming part of Letters Patent No. 783,397, dated February 21, 1905.

Application filed November 6,1903. Serial No. 180,039.

77/5 y con/(567%: views of the two stampings required to build Be it known that \V6.,BERNARD A. BEHREND, up the winding. 5 residing at N orwood,'1n the county of Hamil- In Figs. 1, 2, and 3 the rotor-core 1S inditon and State of Ohio, andEDwIN C. IVRIGHT, cated at 1, having the ventilating-spaces 2 and 5 residing at Newport, in the county of Campend plates 3. The latter are provided with bell and State of Kentucky, citizens of the shelves i for supporting the end connections United States, have invented certain new and of the winding. The rotor is provided with useful Improvements in NVindings for Dynathe teeth 5, and in the slots formed arelocated mo-Electric Machines, of which the following the conductors 3, retained in place by the 10 is a full, clear, and exact specification. wedges 7. Only one conductor per slot is ()ur invention relates to dynamo-electric used, thereby allowing large cross-section of machines, and particularly to windings for the conductor, with consequentlow resistance. the same; and the object of. our invention is Following a single element in Fig. 1 it will to provide a symmetrical continuous winding be seen that starting from a the conductor 5 simple in construction and adapted for the arpasses over several end connections to the matures of generators and motors generally, slot 7), then out, and turns within several end and particularly for the rotor-winding of in connections to 0, then outside the end connec- 5 dnction and synchronous motors havingasintions to slot (Z, then out, and turns within gle conductor per slot. other end connections to c,- and so on in wave 20 Our invention is especially useful for large form. The windings may of course be conmachines when conductors of very large crossnected up to give the results desired-such as section and low resistance are desirable. two-phase, three-phase. &c.-but as the spe- 7 \Vith conductors of large cross-section the eific form of connection for a particular case securingof end connections which shall be simforms no part of our invention only a portion 5 ple in arrangement, compact in form, of low of the uniform winding is shown.

resistance, and with good contacts at points of The form of the loop is shown in Fig. A union is of the greatest importance, and in seand will be understood by reference to the curingthis construction we use laminated barsame in connection with the other figures. windings with the end connections lying close Starting at u, at which point a joint is formed, 3 to the periphery of the core and a form of the conductor makes a turn sidewise at f. joint such that large contact is obtained and There is then a straight portion 1, after which the appearance oft-he conductor kept uniform. the conductor makes a sidewise turn at /r to- Our invention in its preferred form will be ward its slot. Then follows a portion which disclosed in the followingdescription and anconsists of a straight section 1' outside the slot 35 nexed drawings and the novelty thereof set and a straight section Z within the slot. The forth in the appended claims. conductor then makes an inward turn toward In the drawings, Figure 1 is a development the axis at bends sidewise at m, and in the 5 of a portion of a wave-winding for the rotor of short straight portion 11 passes within several an induction-motor. Fig. 2 is a sectional view end connections and bends sidewise at o. 4 through a portion of the rotor on the line 2 2 At 0 a joint is formed, and the conductor of Fig. 1. Fig. 3 is an end view of a portion then passes over other end connections to its of the rotor, showing only a few windings in slot, having bends and straight sections f, g, position thereon. Fig. iis aperspective view 70, 2', Zr, Z, 221, and n from c to a, which correof a loop removed from the rotor. Fig. 5 is spond to those from a to c. It will be noted 45 an enlarged perspective view of portions of that there is only one joint in each loop and one half of a loop, showing the form of joint. that one end of each conductor passes over Fig. 6 is a similar view of portions of the and the other end passes within other end other half of a loop, and Figs. 7 and 8 are plan connections.

form B.

nately, and thus form spaces 0' at the ends to The structure of the conductor is shown in riveted together. This laminated form seequally well in a straight or curved portion Figs. 5 and 6 and is built up of tlnn strips I cures the advantage of reduced eddy or cross 1 currents in the conductor and likewise makes them flexible. The separate strips are stamped out of thin sheet-copper. The stampings A and B are of the form shown in Figs. 7 and 8 and are similar to each other except that A is shorter than B and has a longer extension 7) at one end. The difference in length of the stampings and the length of the extension 7) on A over p on B is equal to the width of the stampings. The bend l is stamped out in the strips A B, as shown. Each conductor is built of a number of stampings, four being shown, two of the form A and two of the These are placed together alterreceive corresponding extensions of the conductor to which it is to be connected. The conductor shown in Fig. 5 corresponds to that extending from a to c and the conductor shown in Fig. 6 corresponds to that extending from 0 to e. The conductors are provided with holes s s and are riveted together by rivets If 6. After the strips are stamped out and the holes .5 s punched the conductor is built up and the rivets t, which are inserted in holes x, are headed up and the ends of the strips tinned. Before being placed on the core that end of the conductor in which the bend Z and extensions j) p are formed is bent at m and 0 to its final shape. The-bends f and it are formed by hand after the conductor is in place on the core and the joints are then riveted up by rivets t in the holes 5 and are well soldered. It is evident that the joint thus formed gives large surface contact, and therefore good conductivity and is uniform in appearance with the rest of the conductor. The end connections are held in place on the shelves 4 by band-wires 8, a sheet of insulating material 9 being located between the bandwires and the end connections. The conductors are insulated from the core and from each other by use of the customary materials.

Vith reference to the winding generally it is seen that a single bar per slot is used and that the end connections lie close to the periphery of the core, as shown in Fig. 3, one portion thereof, from (t to 2 lying the same distance from the axis as the bars themselves and the other portion, from c to Z, lying nearer the axis by a distance approximately equal to the depth of the conductor.

While we have described our winding as applied to the rotor of an induction-motor, we do not limit ourselves to this specific application, as our invention may be equally well ap plied to armature-windings generally whether applied to the rotating or stationary part of the machine. Likewise our novel form of joint could be used in any winding in which laminated conductors are used and can be used of the conductor.

\Ve claim as our invention 1. A winding for dynamo-electric machines having toothed cores, comprising a single conductor per slot,and end connections, half ofsaid end connections being the samedistance from the axis of the machine as the main portion of the conductors, and the other half of said end connections being nearer the axis by a 7 distance approximately equal to the depth of the conductors, the end connection of each conductor at one side of the core passing over and at the other side of the core passing under other end connections, substantially as described.

2. A winding for dynamo-electric machines having toothed cores, comprising a single conductor per slot, each conductor having end connections integral therewith, one of said end connections lying the same distance from the axis of the machine as the main portion of the conductor, and the other lying nearer the axis by a distance approximately equal to the depth of the conductor, the end connection of each conductor at one side of the core passing over and at the other side of the core passing under other end connections. substantially as described.

3. A winding fordynamo-electric machines, comprising conductors having end connections integral therewith, the end connection of each conductor on one side of the core being the same distance from the axis as the main portion of the conductor, and the end connection of the same conductor on the other side of the core lying nearer the axis by a distance approximately equal to the depth of the conductor.

4:. A winding for dynamo-electric machines having toothed cores, comprising a single conductor per slot, and having end connections integral therewith, the end connections for each conductor having a double bend sidewise on each side of the core and on one side of the core having a bend toward the axis of the machine.

5. A windingfordynamo-electricmachines. comprisingconductors having end connections integral therewith, each conductor having two sidewise bends at each side of the core, an inward bend toward the axis of the machinebetween the core andthe two sidewise bonds at one side of the core and an outward extension at one end of the conductor.

6. A winding for dynamo-electric machines, comprising conductors and end connections formed integral therewith, each conductor having two sidewise bonds as f and 71 on one side of the core, two sidewise bends as m and T 0 on the other side of the core, an inward bond as between the core and the bend m and an outward extension at one end of the conductor.

7. A winding for dynamo-electric machines havinglaminated cond uctors,alternate lamina:

of each conductor being shortened at the end to form a joint with the corresponding end of another conductor.

8. In a winding for dynamo-electric machines having laminated conduetors, a joint therefor formed by alternate laminae of each conductor being shortened at the ends, the longer laminae of each conductor occupying the space formed by the shortening of alternate laminae in the other conductor and means to bind the laminae together.

9. In a winding for dynamo-electric machines having laminated conduetors, a joint therefor formed by alternate laminae of each conductor being shortened at the ends, the longer laminae of each conductor occupying the space formed by the shortening of alternate laminae in the other conductor and rivets passing through the laminae to bind them together.

10. In a winding for dynamo-electric machines having laminated conductors, a joint therefor formed by alternate laminae of each conductor being shortened at the ends, the longer laminae of each conductor occupying the space formed by the shortening of alternate laminae in the other conductor and rivets passing through the longer laminae of each conductor to bind them together and other rivets near the joint for binding the laminae together.

11. Ina winding for dynamo-electric machines h aving a single conductor per slot,comprising laminated conductors and end connections integral therewith, the end connection of each conductor having two sidewise bends as f and it on one side of the core, two sidewise bends as m and 0 and an inward bend as Z between the core and the bend m on the other side of the core and an outward extension at one end of the conductor, alternate lamime being shortened at the ends of the conductor to form the joints with other conductors.

In testimony whereof we aflix our signatures in presence of two witnesses.

BERNARD A. BEHREND. EDlVIN C. \VRIGHT. \Vitn esses:

L. K. SAGnn, SANFORD KLEIN.

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