US1266302A - Dynamo-electric machine. - Google Patents

Description

A. H. NEULAND. DYNAMO ELECTRIC MACHINE. "memos FILED mg. 10. I915.

Patented May 14, 1918.

2 SHEETS-SHEET IN VEN TOR.

WITNESSES A. H. NEULAND.

DYNAMO ELECTRIC MACHINE.

APFLlCATION men mi. 10. 1915.

Patented May 14, 1918.

2 SHEETS-SHEET 2.

INVENTOR. WM WM. A

Min ATT NEYS.

WITNESSES:

lation.

UNITED STATES PATENT OFFICE.

.Hl? val k ALFONS H. nEuLaNn'oF NEW roman. Y.

DYNAMO-ELQCTQIC MACHINE5;

sgecln cation, of letters lfatent.

BettentedMay 14, 1918.

Applicationfiled Felir uary 10. 1915. serial ifi'o. 722231 following is a'full,clear, andexact-description. A -41 n My invention relates to dynamo-electric machines and particularly-i0 I alternators, and one object of my invention 'is the-production of such a machine, which, with relatively low angular and peripheralspeed of its rotative parts, will generate a ourrent having a frequency suitable for wireless signaling.

Another object is the-simultaneous'genera- (ion of such currents of various irequencies with a constant speed of rotation and the rendering of'these currentss'avai able' ffor use either selectively or "simultaneously, without altering the speed ofii'btationt Another object is 'to provide Slllh-ifd machincin"which'the rotative parts will be r'r'ecof all windings.

Another object is the ohtai'ning ofa hi h output"by-polarizing a unidirectional fie d and forming strong lnagnetio poles;

Another object is the provision of suio able means for rigidly supporting the-flaminated flux conductors in closely spaced-1e Other general objects oi-myinvent-ionere simplicity and lightness of construction and eflici'ency inoperation. r qgh,

Still other objects and advantages of -my invention will appear from the following description.-

Tn carrying out my invention, Leniploy a stator having the armature or induced-winding disposed circumferentially-abopt -itand a field member or sourcemf unidlrectional magneto motive force so arranged that the lines of force act upon the entirecircumference of the armature orinduced winding.

I also provide two concentric cooperating series of spaced circularly arranged magnetic conductors, the two series being rotative relative to each other, the-magnetic conductors of one series being arranged to successively radially aline with those-pf jhe other series as they arerelativeiy'motated, and thus provide a revolving magnetic path for the flux, and in eflect'lproducing-a revolving-field. This is preferably eflf'ected by the dilferenee n number or the magnetic conductors in "the two series-the number of points iojf 'alineinent being? dependent .upon the number of conductors by which the-two series difl'er." It is evident that this rotative magnetic path may be iproduced by liut a singleririg in 'eachseries era plurality of jringsf ih eahhgseries the plurality being em- =ployed to hrealc' the path of the flux more eiiect ii elynw the non alined portions, and to enable the iiicrease of the magneto-motive force of the -fi'eld .without increasing'the flux; density: This enables a larger armature current flhw an; the windings and results in a greater errtput. i

i The apnatdi-e r-indiited winding is arranged so as tobe traversed by the revolvin afia atneeux; and thereby to have potential induced therein, and it is composed of one?! 'more 'paii's of pole windings, each pole-mnding-prefferahly being a complete coil dr sser, more turns'g the suecessi e and adjacent-edil's'; or p'plelwindin "-hein oppositelyor revrsely wound. 'T e fiel flux consists o itwo components, that is, the one cutting the clockwise windings and the "one cutting the counter clockwise windings, and, as uill latcrhppear, one of the flux components predominates over the other, and the rotation of the magnetic path causes these components to alternately ,cut each coil or pole"winding', and t'hus generates apotential therein. 1, therefore, in the specification and. claiims,"use the term predominating=flux component toudesignate that component of the unidirectional field which is the larger component and generates an E. M, F. which determines the direction of the current in the induced Winding, and I use the term opposed flux component? to designate the -lesser component of the unidirectional field, which generates an E. M. F. in opposition to that generated by the predominating flux component. The foregoing features are broadly discloshd' and claimed in n1y7prior Patent No. 1,211,617, of J anu'ary 9 191 ln my said formerapplication the flux is made to alternate as well as to revolve'iand the frequency per revolution in the stationary winding is determined by the number of magnetic conductors on the rotating pait In accordance with my present invention in order to increase the frequency' 'per revolution without an increase in the numher'of magnetic conductors, I employ" a plurii'lity of these rcvcrscly wound coils within the space from one point of ahncment of the flux conductors to the next successive point of alinomenl. In order to provide for the genoration of a plurality of different frequencies simultaneously, without changing the speed of-the rotors, I employ a number of separate windinvs on the stator, each having a different nuinicr of pairs of pole Windings between the successive points of full alinemcnt, and I employ switches for selectively connecting any or all of these windings into the external circuit. Since, as above pointed out, the frequency generated in the windings depends upon the numbers of pairs of coils or pole windings between the successive points of alinement of the flux conductors, the variation in the number of pairs of pole windings in the different armature or induced windings will effect the desired difference in frequency.

Also in order to increase the frequency of the generated current, I provide for making the two series of. magnetic conductors rotatable in opposite directions, thus increasing the frequency of the alinements of the successive magnetic conductors of the two series.

If a large number of pole windings between alined points is used, the predominating fluxmay only slightly exceed the 0pposed flux, resulting in a relatively small potential difference, I employ means for decreasing or reversing the opposed flux, thereby increasing the effective flux. This is done by polarizing the unidirectional field by means of a current of proper phase supplied to the induced or armature winding. In the present instance this polarizing current is supplied by condensers across the terminals of the induced winding or windin s.

urther, in accordance with my invention, to mount or support the laminated flux conductors in closely spaced relation, I employ a flange member carrying on one side a ring of non-magnetic material, which is preferably integral therewith, and the ring is pro vided with spaced radial slots around its entire circumference, into which laminated steel stanipings are inserted. The flange member is also provided on its other side with a circumferential slot which intersects all the radial slots in the ring, thereby forniing a rectangular opening in the inner end of each slot, into which the inner ends of the laminations are inserted and fit. The outer ends of the laminations are joined to gether by a ring of preferably non-magnetic material, which holds the laminations rigidly in place, and which is preferably insulated from the ring and from the laminations to eliminate waste currents in the solid metal ortions.

My invention also comprehends various other features of construction and arr-angrments and combinations of parts. as will hereinafter more fully appear.

1 shall now describe the embodinn-nt of my invention illustrated in the accompany ing drawings, and shall thereafter point out my invention in claims.

Figure 1 is a transverse vertical section, partially diagrammatic. of a machine enibodying my invention, taken on the line 1-1 of Fig. 2;

2 is a central longitudinal section of the same;

Fig. 3 is an enlarged detail in elevation, of the rings supporting the laminated flux conductors, as viewed from their outer ends. the tongues on the outer ends being omitted for the sake of clearness;

Fig. 4 is a detail of one of the laminated flux conductors, showing sections of the end retaining ring and of the insulation slight y se arated;

ig. 5liS a plan of a laminated tlux conductor;

Figs. 6, 7 and 8 are diagrams of the three armature windings and their respective cir cuits, Fig. 6 showing the armature winding composed of one pair of pole windings, F 1, :7 that composed of two pairs of pole windings, and Fig. 8 that composed of three pairs of pole windings.

Figs. 6,;6",' and 6, are diagrams representing the flux cutting the armature winding shown in Fig. 6 under the conditions when there is no condenser current, when the magneto-motive force of the condenser current just equals that of the opposed flux. and when it exceeds the opposed flux, re spectivel Figs. 7 and 7 are similar diagrams representing the flux cutting the armature winding shown in Fig. 7 under the same conditions, respectively.

Figs. 8, 8" and 8 are similar diagrams representing the flux cutting the armature winding shown in F ig. 8. under the same conditions, respectively.

In the illustrated embodiment of my in vention the magnetic flux traverses the stator and two oppositely rotatable members, the field and armature or induced windings being carried by the stator. thus leaving the rotatable members free of all windings. The stator comprises an annular laminated. soft iron stator element or core, 1, provided at its inner periphery with a circumferential series of longitudinal induced-winding-re ceiving slots or openings 2. preferably not intersecting the inner periphery. as shown. The induced windings are arranged in these slots, as will be hereinafter described.

The laminated stator element 1 is arranged within and carried by an annular portion of the housing of the machine, which is shown as integral with one of the side plates 3, the

housing being completed by a complementary side plate 4. The housing is stationary, being carried by the base 5 of the machine. and the side plates are provided with hub portions 3 and i. respectiirely, which serve as bearings for the rotative parts. The source of magnetic flux is shown as a field coil 6 fitted over and carried by an annular rib or flange 7 on the inneiface of the side plate 3.

Each rotatable member comprises a series of circumfcrentially arranged equally spa ccd laminated flux conductors. the two series being arranged concentrically within the stator element 1.. and preferably each series is composed of a plurality of spaced circular sets or rings. here shown as two. the rings of the two members being arranged in alternate relation When assembled. as shown. As above explained. the construction for supporting and spacing the laminated couductors is such as to permit of their close spacing. while at the same time furnishing a rigid support therefor. My invention with respect to this construction. however. is not. claimed broadly herein. but is claimed in my Patent No. 1'.237.944 of August 21. 1917. The two opposing flange members 8 and 9 of non-magnetic material. are disposed in parallel planes at right angles to the axis of the machine. and are mounted for rotation in opposite directions. The flange memher 8 has on its inner face the two spaced concentric rings or annuli 10 and 11. integral therewith. And the flange member 5) also has on its inner face the two similarly spaced integral concentric annuli 12 and 13. The four annuli are of such diameter and are so spaced that the fit together in close relation and alternate from the exterior to the interior. the annulus 10 being the outermost and closely associated with the stator core 1. and the annulus 13 being the innermost. and the annulus 12 being disposed Within the annular space between the annuli 10 andll. and the annulus ll'beinig disposed within the annular space between the annuli 12 and 13. 7'

Each flange" member is provided on its outer face withtw'o circumferential grooves 14. respectivel i opposite the? two annuli. and each annulus is provided witliequaliy and closely spaced radial slots 15, which extend part Way into the flange member and intersect the respective grooves 14, thereby forming rectangular holes 16. The laminated flux condiictors 17' fit into the slots l5 and are of such Width as tobe flush with the faces of the annuli. A tongue is formed on each end of the flex conductors l7 .'l:-hat on one end enteudin-g through the opening '16 into the groove 14. The outer ends of the annuli are reduced in thickness to form a circumferential tongueconforming to that on the outer ends of'the'flwx conductors 17.

and a grooved end ring 18 fits on this tongue and that of the outer ends of the flux conductors and thus locks the flux conductors securely in their respective slots. To eliminate waste currents. an annular insulation 19 is interposed between the retaining ring 18 and the annulus.

For convenience of reference the series of liux conductors on the member 8 may be referred to as the outer series. and that on the member 9 as the inner series. There are fifty-nine equally spaced conductors 17 in the outer series, this number of course beiimduplicated in each circular set of the series and those of the two sets being in radial alinement; and there are sixty equally spaced conductors 17 in the inner series. It is therefore apparent that the conductors of the two series will. be alined at one point of the circumference and will be progressively more and more off-set between the point of complete alincment and a point opposite the point of alinemcnt, at which latter point they will be completely staggered or off-set. M'anifestly the number of points at which the flux conductors on the two members uliuc is determined the number of conductors by which the two series difl'cr. and it. for instance, those on one member exceed those on the other member by two. there will be two points of full alinemcnt with two points of complete off-set.

It. is obvious that the rotation of one of the two rotative members for a distance equal to the pitch of the flux conductors of that member. will cause the conductors oi the two series to progressively aline from point of full alinement to point of full aliherhent, which in the illustrated mnstruction is 360. thus causing the circumferential regression of the magnetic path formed by t '6 usiind conductors for a complete revolution. In other words. the relative angnitar velocity between the magnetic path amzl the tWo rotatable members is 59 to 1 and 60 tol, respectively, that is. each revolntioii of the outer series of conductors causes the closed magnetic path to make fifty-nine revolutions and each revolution of the: inner series of conductors causes the closed inaignetic path to'niakc sixty revolutions. While the simultaneous revolution of both series in opposite direction causes the path' to make a number of revolutions equal to the sum of the conductors in the two series. or one hundred and nineteen.

The outer series of flux conductors is ca 1'- ried by a soft ir'on' rotative core member 20, which is a solid casting and which forms wait of the: magnetic path, the flange memi er 8 being mounted upon the periphery of the core member 20 outside of the radial plane of the stator element 1. and the Core member 20 also carries on its periphery an annular laminated soft iron complementary core element 21 in the radial plane of the stator element 1 and of the cooperating series of flux conductors 17. This complementary core element 21 is provided on its outer periphery with a series of fifty-nine equally spaced teeth 22, which are in radial alinement with the fifty-nine flux conductors of the outer series in the annuli 10 and 11, and which coiiperate therewith in forming a closed magnetic path.

The two rotors are driven by the motors 23 and 24, respectively, in the directions indicated by the arrows. The rotor of the motor 24 is fixed on the outer end of the central shaft 25, which bears at the end adjacent the motor 24: in the hub 4. and at the other end in the transmission for the other rotor, anti friction bearings being provided, as indicated. The hub portion of the flange member 9 is also keyed to the shaft 25 just inside of the side plate 4, and through this connection rotation is transmitted to the inner series of magnetic conductors. The hub of the core member 20 of the other rotor is keyed to a sleeve 26 surrounding the shaft 25 and bearing at its inner end in the hub portion of the flange member 9, and at its outer end in the hub 3, anti-friction bearings being provided, as indicated. The rotor of the motor 23 is fixed to a stub shaft 27 arranged in line with the shaft 25, and the stub shaft 27 is coupled to the sleeve 26 by a coupling member 28, to which the stub shaft and sleeve are both keyed, and which forms a bearing for that end of the shaft 25, as shown. Through this connection rotation is transmitted from the motor 23 to the outer series of flux conductors.

It is now clear that the rotation of the two rotatable elements in opposite directions produces a rotating unidirectional magnetic field which has many times the velocity of the elements, and this rotating magnetic field cuts the windings on the stator element 1 and induces a high frequency potential therein. In my said former application, in which a revolving field is produced by the rotation of one element, the circumferential distance from one point of full alinement to the next successive point of full alinement, consisting of one alined portion and one unalined portion, constitutes a pole pair, and the two portions respectively oppose two properly spanned pole windings, and in this construction the frequency per revolution of the generated current is determined by the number of teeth on the rotated element. In accordance with my present invention, I increase the frequency per revolution of the generated current by providing more than one pair of pole windings within this space. I also provide for the simultaneous generation of a plurality of different frequencies without changing the speed of rotation, by employing a plurality of independent armature windings, each having a different number of pairs of pole windings within the space from one point of full almement to the next successive point of full alincment. This is of particular advantage in wireless signaling where it is often desirable to change quickly from one frequency to another, and with embodiments of my invention this can be done by merely connecting one or another of the armature windings into the consuming circuit by means of switches.

In the illustrated construction I have shown three independent armatures or induced windings, 29, 30, and 31, circumferentiall arranged on the stationary core 1 in the olcs or slots 2. The windings are arranged in a series of coils, the successive coils being oppositely wound and two successive coils forming a pair of pole windings. The lowest frequency is generated in that winding which is composed of as many pairs of pole windings as the number of flux conductors by which the two series differ, or in the illustrated construction, in a winding composed of one pair of pole windings. As the number of pairs of pole windings is increased the frequency is correspondingly increased, the frequency per revolution being determined by adding the number of flux conductors in one series to that of the second series, and multiplying the sum by the number of pairs of pole windings within the space from one point of full alinement to the next successive point of full alinement. Since in the illustrated machine there is but one point of full alinement, this distance is 360, and I have therefore shown the winding 29 as composed of one pair of pole windings, and the winding 30 as composed of two pairs of pole windings and the winding 31 as composed of three pairs of pole windings. These coils are shown diagrammatically in Figs. 6, 7 and 8, respectively. These are merely examples of possible windings, although the number of pairs of pole windings within the space between the successive points of alinement may be increased to a certain limit, which will be later ex lained. The flux conductors 17 are preferab y thin, as is shown in the drawing, in order that the fully or partly alined conductors will substantially oppose only one pole winding when the span or pitch of the windings is small on account of there being relatively a large number of them.

Since the flux at all points of the circumference is unidirectional, the flux through the pole windings may be divided into two components, one traversing all clockwise pole windings and one traversing all counterclockwise pole windings. When the center of the alined portion opposes the center'of a clockwise pole winding, the flux component traversing all clockwise pole windings will be larger than the flux component traversing masses all. counter-clockwise pole windings, and the latter flux component generates a potential smaller than and in opposition to that generated by the first component.

predominating flux component. and the lat:- leias the opposed flux component.

It wiil. new be seen that as the number of pairs of pole windings bet-ween two successive points of alinement is increased; the predominance of the predominating flux over the opposed flux becomes less, other condi tions remaining constant, and, as previously indicated, there is. therefore, a limit beyond which the polewindings cannot practically be increased. When the number of pairs of pole windingslcetwecn two points of alinement is large, the predominating flux may he only slightly larger than the opposed flux, resulting in rather Weak field poles and only a small active flux and terminal potential difference; In accordance with my invenlion I provide {or armature excitation which serves to form powerful magnetic field poles.

This means consists. in the embodiment shown, of means for supplying a magnetiz" ing'current to the armature windings which is substantially in line or in phase with the point of full alinemeut of-the flux conductors and with the flux, and with all other points opposed by similarly wound pole windings. Specifically, this source of magnetizing current is one or more condensers 32 connected across the terminals of each armature winding as indicated in Figs. 6. T and 8. The magneto-motive force due to the armature magnetizing current is, at the said points, in the same direction as that, due to thafiel d current, and hence it mat rially strengthens allthe poles traversed by the predominating flu): component. Since; in the form hown. all the pole windings are connected in series, themagnetizing current is of equal magnitude in that half ot' the pole windings which is traversed by the. op-" posed flax (xamponenii. Hence, tlie arms lure magnetiaingcurrent in the latter \vn nlmgs opposes the magneto-metric force" ol the field. and if the two are eqnal'the opposed flux through these pole windings is eliminated. When the armature magnesia ing magnetmmotive force exceeds the field magneto-motive tor-cc; the flux through the pole win-dings traversed by: the opposin flux is reversed, and isno longer an oppose L flux. but is now active and must be added to the predominating flux since'itgenerates in the windings a potential-which is in the same direction as that due to the. prcdom mating flux.

This phenomenon is illustrated in the diagrams of Figs. 6 to 8. These diagrams are developments otthe fluxes and the windings, and represent the conditions which obtain during one revolution of'the magnetic field.

The first. coin poneut will hereinafter be referred to as the liigs. fi 'ffi 'and 6 represent the flux cutting the 'vinding :29 of Fig. 6, first, when thereis no armature magneto motive force by reason ofcondenser excitation, second, when the annature magneto-motive torceby rea"- son of the condenser excitation just equals the field magneto motive force, and third, when the armature magneto-motive force by reason oi the condenser excitation exceeds the field magneto-motive force. The active flux, that is. the difference. between the predoanimatingand opposed flux, is re n'esented by the shaded area. Since the induced wiuding'29' has but one pair of pole windings. each pole winding spans 180 mechanical degrees, and hence there is but one cycle during a. revolution of the field, and the distancebetiween the lines A and B. which is 180 electrical degreesis also 180 mechanical deg-recs.- 'Ehe predominating flux compouent is cutting the pole winding which spans the space between the lines A and B; and the opposed flux component is cutting the other 'pole winding which spans the space from 'line B to, line A. The quantity oi opposed iiux is represented hy'the areas 7;, 7i 'and"therefore the areas a, a, which are equivalent to the areas 7), b. are deducted from the: predominating flux area, leavin the active-flux represented by the shade" ortion.

In the condition represented by Fig. 6. the armature magneto-motive force by rcir son 'of the condcnser excitation just'neutralizes illG'fiPPOSGd flux while ai the same time increasing the redominating flux, and therefore. not on y isthe area representing thcpredhminatin llux larger than in Fig. o hut it'is all s adedto represent active flux. sincc the areas 7), b are eliminated and hence the equivalent areas a, a.

In the condition represented by Fig. 6,

not only is'tl'ic'predomhiitiiifflgfl uii still further increasedjhy the greater amnature magneto-motive forcei but/the opposed'fiux has now been reversed and has'become actives as. represented by the areasl)" b; the entire actii'e fiiix being represented the sum oi the shaded portions both above and below the line? Figs; 7, 7" and 7 represent the flux traversii'ig the" indl'l'ced' Wiiidliigflfl of Fig. 7' under the three same respective conditions. new. since the span of'each pole winding is but 90*; there are twoc cles. for each revolution ol'tlfe magnetic eld", andli'enc'e the distance betweenthe lines A and'B, which rcpre sentsthe span ofthe several pole wind ings. is 180 electrical degrees. Reading toward theriglit. the two pole windings spanning thespaces between the lines A and B. are traversed by predominating fl'l'lY components. while those Spanning the two spaces between lines Band A are traversed by opposed' fiux components. Hence the areas c, a, d, d, represent predominating flux, and the areas 6, b, c, 0, represent opposed flux. The areas a, a substantially neutralize the areas d, d and the areas 6, b substantially neutralize the areas a, a, thereby leaving the shaded area as the active flux.

In Fig. 7", as in Fig. 6", the opposed flux is eliminated and the predominating flux components are increased by the armature magneto-motive force, and hence the areas (Z, d have now become active poles. In Fig. 7, as in Fig. 6, the predominatin flux components are still further increased, and the opposed flux components are now reversed and have become active, the entire active flux being represented by the shaded portions both above and below the line.

Figs. 8, 8* and 8 represent the flux traversing the induced winding 31 of Fig. 8. Here there are three cycles to each revolution of the magnetic field, since the span of each pole winding is but 60, and therefore in the diagram the distance between the lines A and B, which is the distance spanned by each pole winding, is 180 electrical degrees, but only 60 mechanical degrees. Here again, reading toward the right, the three pole windings spanning the spaces between the lines A and B are traversed by predominating flux components, while those spanning the three spaces between the lines B and A are traversed by opposed flux components. Hence the areas a, a, d, d, e, 6, represent predominating flux, and the areas 6, b, c; c, f, f, represent opposed flux. The areas i, f substantially neutralize the areas 6, e, t e areas 0, c substantially neutralize the areas at, cl, and the areas 72, b substantially neutralize the areas a, a, thereby leaving the shaded area as the active flux.

In Fig. 8", as in Figs. 6" and 7*, the opposed flux is eliminated, andthe predominating flux components are increased, and hence the areas 0? d, e, e have now become active poles. In B ig. 8, as in Figs. 6 and the redominatin flux components are stlll furt er increasecfi and the opposing flux components are reversed and have become active, as indicated.

Thus it will be seen that, while the field current establishes the two flux components, fixes the frequency in the several windings and induces a potential therein, serving to energize the condenser, the condenser current polarizes the field and creates power- :t'ul magnetic poles which enable the generation of large quantities of current.

As is shown in Figs. 6, 7 and 8, switches 33 are provided which control the connection of the condensers into the armaturepr induced circuits, and also the connection of the armature or, induced windings into the external circuit 34.

It is manifest that with embodiments of my invention large quantities of high hequency currents, either single-phase or poly phase, suitable for purposes of Wireless signaling, may be produced with but low angular and peripheral velocity of the rotat- 111g parts, and that the frequency of the current may readily be changed without changing the speed of the rotating parts.

It is obvious that various modifications may be made in the construction shown in the drawings and above particularly described, within the principle and scope of my invention.

I claim:

1. A dynamo-electric machine comprising a source of magnetic flux, a stator, two concentric rotors mounted co-axially with the stator and rotatable in opposite directions, the three members being traversed by the magnetic flux and each rotor comprising a series of. spaced magnetic conductors and the conductors of one series diifering in number from those of the other series. whereb the conductors of the two series will ra ially aline at at least one point progressively as the two rotors are oppositely rotated and thereby form a revolving closed magnetic path for the flux having greater angular velocity than the relative angular velocity of the rotors, and an induced winding adapted to be traversed by the magnetic flux and arranged to have a potential generated therein as the magnetic path and flux revolve.

2. A dynamoelectric machine comprising a source of magnetic flux, a stator, two c011- centric rotors mounted co-axially with the stator and rotatable in opposite directions, the three members being traversed by the magnetic flux and each rotor comprising a series of spaced magnetic conductors and the conductors of one series differing in number from those of theother series, whereby the conductors of the two series will radially uline at at least one point progressive] as the two rotors are oppositely rotate and'thereby form a revolving closed magnetic path for the flux having greater angular velocity than the relative angular velocity of the rotors, and an induced winding circumferentially arranged within the magnetic field and comprising a pair of oppositely wound pole windings arranged in succession within the angular distance from one point of full alinement of the magnetic conductors to the next successive point of full alinement, whereby the revolving magnetic path and flux cause the twopole windings to be alternately cut by predominating and opposed flux components generatin a resultant E. M. F. in the induced winding commensurate with the difference between the flux components.

3. A dynamo-electric machine comprising a source of magnetic flux, a stator member, afiux directing member comprising a series essees of spaced magnetic conductors circumferentially arranged concentric with the stator, a;

rotor member ha ring a series of spaced magnetic conductors arranged concentric with those of the first series and differing in number therefrom, the three members being lra versed by the magnetic flux, whereby the conductors of the two series will radially aline at at least one point progressively as the rotor is rotated and thereby form a re i'olving closed magnetic path for the flux having a. higher angular velocity than that of the rotor, and a plurality of independent induced windings adapted to be traversed by the magnetic flux andso arranged as to be simultaneously acted upon by the re tolving flux and to have a different frequcncy generated thereby in each of said windings.

l. A dynamo-electric machine comprising a source of magnetic flux, a stator member, a flux directing member comprising a series of spaced magnetic conductors circumferentially arranged concentric with the stator, a rotor member having a series of spaced magnetic conductors arranged concentric with those of the first series and differing in number therefrom, the three members being traversed by the magnetic fluxwhereby the conductors of the two series will radially aline at at least one point progressively as the rotor is rotated and thereby form a revolving closed magnetic path for the flux having a higher angular 'elocitg, than that of the rotor, and a. plurality of inde Ven dent induced windings circumferentia-ly arranged within. the magnetic field and having res 'iectively different numbers of pairs ol oppositely wound pole windings arranged in succession within the angular distance from one point of full alinement oi the n'iagnetic conductors to the next successive point of full alinement, whereby a dif ferent frequency is generated in each induced winding as the closed magnetic path and flux are revolved.

5. In a dynamo-electric machine, a magnetic circuit formed partly of a series of laminated flux conductors rotatable in one direction and a second series of flex conductors adjacent to the first series and rotatable in the opposite direction, the flux conductors of one series being so arranged with respect to those of the other that when the flux conductors of one series are alined with the: flux conductors of the other series m on 7 portion of the machine they are unalined in another part of the machine, means for producing a magnetic flux through the magnetic circuit, and a plurality of independent induced windings adapted to be traversed by said flux and each comprising a plurality of pole windings, the pole windings of each induced winding differing in pitch from the corresponding pole windings of the other induced windings, whereby with a uniform speed of rotation potentials of different frequencies are generated in said induced windings.

6. In a dynamo-electric machine, a mag netic circuit formed partly of a series of laminated flux conductors rotatable in one direction and a second series of flux condnctors adjacent to the first series and rotatable in the opposite direction. the flux conductors of one series being so arranged with respect to lthose of the other that when the fiux conductors of one series are alincd with the flux conductors of the other series in one portion of the machine they are unalined in. another part of the mai'zhilw means for producinga magnetic flux tlnrough the mag netic circuit,-and a plurality of independent induced windings adapted tov be traversed by said flnxrand each comprising a plurality oi pole windings. the adjacent pole windings oifrcaclrinduccd winding being wound in opposite directions and the pole windings of each induced winding differing in pitch from the corresponding pole windings of the other induced \viudin s, whereby with a uniform speed of rotation potentials of ditierent frequencies are generated in said induced windings.

T. A dynamo-electric machine comprising a sonrce'of magnetic flux, a stator member, a fiux directing member comprising a series of spaced magnetic conductors circumferentially arranged concentric with the stator, a rotor member having a series of spaced magnetic conductors arranged concentric with those of the first series and differing in number therefrom, the three members being traversed by the magnetic flux. whereby the coi'ulnctors of. the two series will radially alinc at at least one point progressively as the rotor is rotated and thereby form a revolving closed magnetic path for the flux hai'inga higher angular velocity than that ofthe rotor, a plurality of independent induced windings circmnferentially arranged within the magnetic field and having respectively different numbers of pairs of o-p positely woundpole windings arranged in snore ionn'ithin the angular distance from onep t of full alincment of the magnetic condnctorsto the next successive point of full alinen ent, whereby a diii'crcnt. frequen cyis generated in each induced winding as the closed magnetic path and flux are revolved, and nicans for independently connectingthe several induced windings to an externalcircuit.

8. A dynamo-electric machine comprising a source of magnetic flux, a stator, two concentric rotors mounted co-axially with the stator and rotatable in. opposite directions, the three members being traversed by the magnetic flux and each rotor comprising a series of spaced magnetic conductors and the conductors of one series dillering in number from those of the other series, whereby the conductors of the two series will radially aline at at least one point progressively as the two rotors are oppositely rotated and thereby form a revolving closed magnetic path for the flux having greater angu ar velocity than the relative angular velocity of the rotors, and a plurality of independent induced windings circumferentially arranged with in the magnetic field and having respectively diflerent numbers of pairs of oppositely wound pole windings arranged in succession within the angular distance from one point of full alinement of the magnetic conductors to the next successive point of full alinement, whereby a diflerent frequency is generated in each induced winding as the closed magnetic path and flux are revolved.

9. The combination of a dynamo-electric machine comprising a source of magnetic flux, a stator and a rotor traversed by said flux and including means for producin a revolving closed magnetic path for the ux as the rotor rotates, the flux path rotating at a higher angular velocity than that of the rotor, an induced winding circumferentially disposed in the magnetic field and comprising a plurality of pairs of pole windings, the two pole windings of each pair being 0 positely wound, the clockwise windings an the counter clockwise windings being alternately traversed by a predominating and an opposed flux component as the magnetic path and flux rotate, generating thereby a resultant E. M. F. in the induced winding commensurate with the difference between the flux components; and means for supplying a magnetizing current to said winding of such phase as to produce strong magnetic field poles strengthening the predominating flux component and weakening the opposed flux component.

10. The combination of a dynamo-electric machine comprising a source of magnetic iux, a stator and a rotor traversed by said flux and including means for producin a revolving closed magnetic path for the ux as the rotor rotates, the flux path rotating at a higher angular velocity than that of the rotor, an induced winding circumferentially disposed in the magnetic field and comprising a plurality of pairs of pole windings, the two pole windings of each pair being oppositely wound, the clockwise windings and the counter clockwise windings being alternately traversed by a predominating and an opposed flux component as the magnetic path and flux rotate, generating thereby a resultant E. M. F. in the induced winding; commensurate with the difference between the flux components and a condenser acted upon by said potential and arranged to supply a magnetizing current to said winding of such phase as to establish strong magnetic field poles strengthening the predominating flux component and weakening the opposed flux component.

11. The combination of a dynamo-electric machine comprising a source of magnetic flux, a stator and a rotor traversed by said flux and including means for producing a revolving magnetic path for the flux as the rotor rotates, a plurality of induced windings circumferentially disposed within the magnetic field and each comprising a difl'erent number of airs of pole windings, the pole windings 0? each pair being oppositely wound, whereby a different frequency is generated in each induced winding as the rotor rotates; and a condenser connected in circuit with each induced winding and arranged to be acted upon by the potential gencrated in said winding and to supply a magnetizing current to said winding, thereby establishmg strong field poles, and means for independently connecting the several induced windings to an external circuit.

12. The combination of a dynamo-electric machine comprising a source of magnetic iux, a stator, two concentric rotors mounted co-axially with the stator and rotatable in opposite directions, the three members being traversed by the magnetic flux and each rotor comprising aseries of spaced magnetic conductors and the conductors of one series differing in number from those of the other series, whereby the conductors of the two series will radially aline at at least one point progressively as the two rotors are oppositely rotated and thereby form a revolving closed magnetic path for the flux having greater angular velocity than the relative angular velocity of the rotors, an induced winding circumferentially arranged within the magnetic field and comprising a pair of oppositely wound pole windings arranged in succession within the angular distance from one oint of full alinement of'the magnetic con uctors to the next successive point of full alinement, whereby the revolving magnetic path and flux cause the two pole windings to be alternately out by predominating and opposed flux components enerating a resulting E. M. F. in the induce winding commensurate with the difi'erence between the flux components; and means for supplying a magnetizing current to said winding of such phase as to produce strong magnetic field poles coiiperating with the predominating flux component and acting against the opposed flux component.

13'. The combination of a dynamo-electric machine comprising a source of magnetic flux, a stator, two concentric rotors mounted co-axially with the stator and rotatable in opposite directions, the three members being traversed by the magnetic flux and each rotor comprising a series of spaced magnetic conductors and the conductors of one series difiering in number from those of the other series. whereby the conductors of the two series will radially aline at at least one point progressively as the two rotors are oppositely rotated and thereby form a revolving closed magnetic path for the flux having greater angular velocity than the relative angular velocity of the rotors, an induced winding circumferentially arranged within the magnetic field and comprising a pair of oppositely wound pole windings arranged in succession within the angular distance from one point of full alinement of the magnetic conductors to the next successive point of full alinemcnt, whereby the revolving magnetic path and flux cause the two pole windings to be al ternately cut by predominating and opposed flux components generating a resultant E. M. l in the induced winding commensurate with the difference between the flux components, and a condenser acted upon by Said potential and arranged to supply a magnetizing current to said winding strengtlr cning the predominating flux component and reversing the opposed flux component, thus polarizing the field.

14. The combination of a dynamo-elec trio machine comprising a source of magnetic flux. a stator member, a flux directing member comprising a series of spaced magnetic conductors circumferentially arranged concentric with the stator, a rotor member having a series of spaced magnetic conductors arranged concentric with those of the first series and differing in number therefrom, the three members being traversed by the magnetic flux, whereby the conductors of the two series will radially aline at at least one point progressively as the rotor is rotated and thereby form a revolving closed magnetic path for the flux having a higher angular velocity than that of the rotor. a plurality of independent induced windings circumferentially arranged within the magnetic field and having respectively different numbers of pairs of oppositely wound pole windings arranged in succession within the angular distance from one point of full alinement of the magnetic eonductors to the next successive point of full alinement, whereby a different frequency is generated in each induced Winding as the closed magnetic path and flux are revolved; and means for supplying a magnetizing current to each of said induced windings in line with the magnetic path and establishing strongimagnetic field poles.

15. The combination of a dynamo-electric machine comprising a source' of magnetic flux, a stator member. a flux directing member comprising a series of spaced magnetic conductors circumferentially arranged concentric with the stator, a rotor member having a series of spaced magnetic conductors arranged concentric with those of the first series and differing in number therefrom, the three members being traversed by the magnetic flux. whereby the conductors of the two series will radially aline at at least one point progressively as the rotor is rotated and thereby form a revolving closed magnetic path of the flux having a higher angular velocity than that of the rotor, a plurality of independent induced windings circumferentially arranged within the magnetic field and having respectively different numbers of pairs of oppositely wound pole windings arranged in succession within the angular distance from one point of full alinement of the magnetic conductors to thernext successive point of full alinement, whereby a different frequency is generated in each induced winding as the closed magnetic path and flux are revolved; a condenser adapted to be connected in circuit with each induced winding and to be acted upon by the potential generated in said winding and to supply a magnetizing cur rent to said winding and establish strong field poles, and means for independently connecting the several induced windings to an external circuit.

16. A dynamo-electric machine comprising a source of magnetic flux, a stator, two concentric rotors mounted co-axially with the stator and rotatable in opposite direc tions, the three members being traversed by the magnetic flux and each rotor compris ing a series of spaced magnetic conductors and the conductors of one series difiering in number from those of the other series, whereby the conductors of the two series will radially alinc at at least one point progressively as the two rotors are oppositely rotated and thereby form a revolving closed magnetic path for the flux having greater angular velocity than the relative angular velocity of the rotors a plurality of independent induced windings circumferentially arranged within the magnetic field and having respectively different numbers of pairs of oppositely wound pole windings arranged in succession within the angular distance from one point of full alinement of the magnetic conductors to the next successive point of full alinement, whereby a different frequency is generated in each induced winding as the closed magnetic path and flux are revolved, and means for independently connecting the several induced windings to an external circuit.

17. A dynamo-electric machine comprising a source of magnetic flux, an annular stator and two annular series of regularly spaced magnetic conductors traversed by said flux, one series of magnetic conductors being rotative and the conductors of the two series differing in number, whereby they will successively radially aline as the one series is rotated and form a revolving closed magnetic path for the flux, and a plurality of induced windings arranged on the stator circumferentially thereof and each having a different number of pairs of pole windings disposed within the angular space from one point of full alinement of the magnetic conductors to the next successive point of full alinement, whereby a different frequency is generated in each induced winding as the closed magnetic path is revolved.

18. A dynamo-electric machine comprising an annular stator, means carried by the stator for producing a unidirectional magnetic field, two concentric rotors mounted co-axially with the stator and rotatable in opposite directions, the three members being traversed by the magnetic flux and each rotor comprising a series of spaced magnetic conductors and the conductors of one series differing in number from those of the other series, whereby the conductors of the two series will aline at at least one point progressively as the two rotors are oppositely rotated and thereby form a revolving closed magnetic path for the flux having a higher angular velocity than the relative velocity of the two rotors, and an induced winding circumferentially arranged within the magnetic field and comprising a pair of oppositely wound pole windings arranged in succession within the angular distance from one point of full alinement of the magnetic conductors to the next successive point of full alinement, whereby the revolving magnetic path and flux cause the two pole windings to be alternately cut by predominating and opposed flux components generating a resultant E. M. F. in the induced winding commensurate with the difierence between the flux components.

19. A dynamo-electric machine comprising an annular stator, means carried by the stator for producing a unidirectional magnetic field, two concentric rotors mounted co-axially with the stator and rotatablein opposite directions, the three members being traversed by the magnetic flux and each rotor comprising a series of spaced magnetic conductors and the conductors of one series difl'ering in number from those of the other series, whereby the conductors of the two series will aline at at least one point progressively as the two rotors are oppositely rotated and thereby form a revolving closed magnetic path for the flux having a higher angular velocity than the relative velocity of the two rotors, and a plurality of independent induced windings circumferentially arranged within the magnetic field and having respectively difl'erent numbers of pairs of oppositely wound pole windings arranged in succession within the angular distance from one point of full alinement of the magnetic conductors to the next successive point of full aliuciucnl, whereby a different l re quency is generated in each induced winding as the closed magentic path and flux are rcvolved.

20. The combination of a dynamo-electric machine comprising an annular stator, means carried by the stator for producing a unidirectional magnetic field, two conccir tric rotors mounted co axially with. the stator and rotatable in opposite directions, the three members being traversed by the magnetic flux and each rotor comprising a series of spaced magnetic conductors and the conductors of one series differing in number from those of the other series, whereby the conductors of the two series will alinc at at least one point progressively as the two ro tors are oppositely rotated and thereby form a revolving closed magnetic path for the flux having a higher angular velocity than the relative velocity of the two rotors, a plurality of independent induced windings circumferentially arranged within the magnetic field and having respectively difierent numbers of pairs of oppositely wound pole windings arranged in succession within the angular distance from one point of full alinement of the magnetic conductors to the next successive point of full alinement, whereby a difierent frequency is generated in each induced Winding as the closed magnetic path and flux are revolved; a condenser adapted to be connected in circuit with each induced winding and to be acted upon by the potential generated in said winding and to supply a magnetizing current to said winding and establish strong field poles, and means for independently connecting the several induced windings to an external circuit.

21. In a dynamo-electric machine, a rotor comprising a flange portion provided on one side with a projecting annulus and on the other side with a circumferential groove opposite the annulus, the annulus being provided with slots intersecting the circumferential groove, and a laminated flux conductor fitting into each slot and having a tongue extending into the circumferential groove through the opening formed by the intersection of said groove with the respective slot.

22. In a dynamo-electri machine, a rotor comprising a flanged portion provided on one side with a projecting annulus and on the other side with a circumferential groove opposite the annulus, the annulus being provided with slots intersecting the circumferential groove, a laminated flux conductor fitting into each slot and havin a tongue extending into its circumferential groove through the opening formed by the intersection of said groove with the respective slot, and removable annular retaining means attached to the opposite end of the annulus .and engaging the ends of all of the conductors and serving to hold the conductors in their slots.

ing a source of magnetic flux, a stator member, a flux directing member comprising a series of spaced magnetic conductors circumfcrentially arranged concentric with the stator, a rotor member having a series of spaced magnetic conductors arranged concentric with those of the lirst series and differingin number therefrom, the three members being traversed by the magnetic flux,

whereby the conductors ofthe two series will radially aline at at least en point progres si vely as the rotor is rotated and thereby form a revolving closed magnetic path for the flux having a higher angular velocity than that of the rotor, and an induced winding adapted to be traversed by the inagneticlinx and arranged to have a potential generated therein asthe magnetic path and flux revolve.

:24. A dynamo-electric machine comprising a source of magnetic flux, afitntor memher, a flux directing member comprising a series of spaced magnetic conductors circunn l'erentially arranged concentric with the stator, a rotor member having a series of spaced magnetic conductors arranged concentric with those of the first series and diftering in number therefrom the three members being traversed by the magnetic flux, whereby the conductors of the two series will radially aline at at least one point progres sively as the rotor is rotated and thereby form a revolving closed magnetic path for the flux having a higher angular velocity than that of the rotor, an. induced winding adapted to be traversed by the magnetic flux and arranged to have a potential 'enerated therein as the magnetic path anc flux revol ve, and means for supplying a magnetizing current in said winding of such phase as to produce strong magnetic field poles strengthening the component of the flux tmversing the alined portion of the magnetic path and weakening the component traversing the non-alined portion.

35. A dynamo-electric machine comprising a source of magnetic flux, a stator member. a flux directin member comprising a series of spaced magnetic conductors circumt'erentially arranged concentric with the stator a rotor member having a series of spaced magnetic conductors arranged concentric wit 11 those o the first series and differing in number the efrom. the three members being Iraversed by the magnetic flux, whereby the conductors of the two series will radially a1 ine at at least one point progressively as the rotor is rotated and thereby form a revolvlug closed magnetic path for the flux having a higher angular velocity than that of the rotor, an induced winding adapted to be traversed by the magnetic flux and arranged ,to have a potential enerated therein as the magnetic path and flux revolve, and a condenser acted upon by said potential and ar- A dynamo-electric machme COIIIP11S' ranged to supply a magnetizing current to said winding of such phase as to establish strong magnetic field poles strengthening the component of the Hun traversing the almed portion of the magnetlc path and weakening the component traversing the non-alined portion.

26. A dynamo-electric machine comprising a source of magnetic flux, a stator member, 21 flux directing member comprising a series of spaced magnetic conductors circumferentially arranged concentric with the stator, arotor member having a series of spaced magnetic conductors arranged concentric with those of the first series and differing in mmber therefrom, the three members being traversed by the magnetic flux, whereby the conductors of the two series will radially Z aline at at least one point progressively as the otoris rotated and thereby form a revolving closed magentic path for the fluxhaving a higher angular velocity than that of the rotor, and an induced winding circumferentially disposed in the magnetic field and comprising a plurality of pairs of pole windings the two pole windings of each pair being oppositely wound and the two windings being alternately traversed by the flux component of the alined portion of the flux path and the flux component of the non-alined portion of the flux path as the magnetic path and flux rotate, generating thereby a resultant E. M. F. in the induced winding commensurate with the difference between the flux components.

27. A dynamo-electric machine comprising a source of magnetic flux, a stator member, a flux directing member comprising a series of spaced magnetic conductors circumferentially arranged concentric with the stator, a rotor member having a series of spaced magnetic conductors arranged concentric with those of the first series and differing in number therefrom, the three members being traversed by the magnetic flux, whereby the conductors of the two series will radially aline at at least one point progressively as the rotor is rotated and thereby form a revolving closed magnetic path for the flux having a higher angular velocity than that of the rotor, an induced winding circumferentially disposed in the magnetic field and comprising a plurality of pairs of pole windings the two pole windings of each pair being oppositely wound the two windings being alternately traversed by the flux component of the alined portion of the flux path and the flux component of the nonalined portion of the flux path as the magnetic path and flux rotate, generatin thereby a resultant E. M. F. in the mduced winding commensurate with the difl'erence between the flux components, and a condenser acted upon by said E. M. F. and arranged to supply a magnetizing current to said Winding of such phase as to establish strong magnetic field poles strengthening the former flux component and weakening the latter flux com onent.

28. A dynamo-e ectric machine comprisiug a source of magnetic fiux, a stator, two concentric rotors mounted co-axially with the stator and rotatable in opposite directions, the three members being traversed by the magnetic flux and each rotor comprising an annulus provided with longitudinal slots open at one end, a laminated flux conductor disposed in each slot, an annular retaining means on the end of the annulus engaging the conductors and holding them in their slots; the flux conductors of one rotor differing in number from those of the other rotor, whereby the conductors of the two rotors will radially aline at at least one point progressively as the two rotors are oppositely rotated and thereby form a revolving closed magnetic path for the flux having greater an lar velocity than the relative angular ve ocity of the rotors, and an induced winding adapted to be traversed by the magnetic flux and arranged to have a potential generated therein as the magnetic path and flux revolve.

29. A dynamo-electric machine comprising a flux directing member, a rotor member cooperating therewith to produce a revolving flux path having higher angular vel city than that of the rotor, a source of unidirectional flux radially cutting the two members and distributed by the revolving flux path to produce a revolving unidirectional ma etic field, and an induced winding circum erentially disposed within the magnetic field and comprising a pair of oppositely wound pole windings.

In Witness whereof, I subscribe my signature, in the presence of two witnesses.

ALFONS H. NEULAND.

Witnesses:

Vwron D. Boner, WALDO M. Crmrm.

0011s 0! thin patent may be obtained for five cents each, by addressing the "Commissioner or ratelh.

Wuhlngton, D. O."

Images