US408642A - Inductional electric motor - Google Patents

Description

(No Model.)

C. J. VAN DEPOELE.

INDUGTIONAL ELECTRIC MOTOR. No. 408,642. Patented Aug. 6, 1889.

witnesses @fl/manica UNITED STATES PATENT OFFICE.

CHARLES J. VAN DEPOELE, OF LYNN, MASSACHUSETTS.

INDUCTIONAL ELECTRIC MOTOR.

SPECIFICATION forming part of Letters Patent No. 408,642, dated August 6, 1889.

Original application filed April 23, 1889, Serial No. 308,241. Divided and this application filed July 13, 1889. Serial No. 317,432. (No model.)

T0 all whom, t may concern:

Be it known that l, CHARLES J. VAN DE- POELE, a citizen of the United States, residing at Lynn, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Inductional Electric Motors, of which the following is a description, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon.

This application is a division of case filed April 23, 1889, Serial No. 308,241. i

My invention relates to improvements in electro-dynamic motors of the class adapted to be operated by currents of alternating polarity, or currents having a dened rise and fall, whether of alternating or constant polarity; and the present invention is a development of the invention shown and described in Letters Patent No. 300,535, granted to me June 17, 1884.

Broadly, the invention consists in applying alternating or intermittent electric currents to the field-magnet coils of an electro-dynamic motor for creating a field of force therein, the iron portions of said field-magnet being suitably subdivided to secure the desired rapidity of magnetization and demagnetiZat-ion, the said field of force acting inductively upon a closed circuited winding upon the annular core of the armature. An armature of the Gramme type may be employed, the desired results being attained by electrically connecting the commutator-brushes in order to afford a deiined path for the iiow of the secondary currents generated in the armature-coils by the inductive action of. the reversals of polarity in the iield of force. This method of operation is fully set forth in my said prior patent in connection with continuous currents. As there set forth, I may also, for the better government and control of the machine, close the connnutator-brushes through an exterior circuit including an adjustable resistance. The effect upon the core of the armature is increased by additional windings connected in separate closed sections, and also caused to produce secondary currents by induction. The separate independent closed-circuit coils may be arranged as intermediate sections placed between the coils connected to the com mutator, or the wire may be wound in separate layers, all the sections of one layer being connected to the commutator and the remainder connected as separate closed circuits each including any desired number of coils. By employing the closed circuits in addition to the regular winding a limited quantity of wire is connected to the commutator, and the tendency to sparking is thereby diminished and greater durability of both commutator and brushes secured.

In the drawings, Figure l is a diagrammatic view showing a motor having both commutated and uncomiuutated coils upon its armature. Fig. 2 is a view in elevation, partly in dia-gram, the armature of which is provided with commutated and uncommutated coils and an adjustable resistance in circuit with the cominutator-brushes.

As indicated in said drawings, A B represent the polar extensions of the field-magnets, which said field-magnets may be of any desired or convenient type.

C is the field-magnet winding, the coils of said winding being placed upon suitablylaminated. cores connecting or attached to the said pole-pieces. The pole-pieces AB should also be of subdivided iron to secure ready resistance to the reversals or phases of the supply-current, which current may be of alternat-ing polarity or intermittent or pulsating in character, and is supplied tothe iield-magnet circuit through conductors a b.

D is the armature, which, as indicated, is of the Gramme type, having an annular core l), provided with a continuous winding of suitable-sized insulated copper conductor F.. rlhe winding E is connected at suitable intervals by conductors e with the sections f of the comniutator F. The armature and commutator are mounted upon a suitable shaft e,and are thereby sustained in rotative relation to the iield-magnet extensions A B.

G G are adjustable commutator-brushes suitably sustained in operative relation to the surface of the commutator F.

As indicated in Fig. l, the commutatorbrushes G G are merely connected by conductors g g', which may be electrically united through switch (2, it being understood, however, that the switch may be dispensed with IOO and a single wire used to connect toe conunutator-brushes. The circuit uniting the coinn'nitator-brushes inay be extended and includ e` current-controlling devices ot any desired nature, whereby the flow ot current in the ari'nature can be controlled.

As shown in said 'Fig'. 2, conductors g g are connected, respectively, to a rheostat g and a switch-lever g4, whereby niore or less artiliA cial resistance can be introduced Vinto the armature-circuit at will. It will be apparent that by adjusting' the positions of the coniinuta-tordn'ushes the arinature-poles can be located and maintained. wherever desired7 and the direction or speed ol' rotation ot the said armature can be governed accordingly.

In the apparatus forming the subject ol the present application an additional winding` or windings provided upon the arinature in the torni of what I have called unconnnutated coils ll. The uncoinniutated coils are closed upon themselves, and. consequently have no connection with the coniutator or circuit devices of the machine, and with each phase of current in the Held-magnets secondary7 currents will be generated in said unconr mutated coils, which, beim@r in the saine direction as the currents generated in. the continuous coils et' the arniatu re, will coact to establish poles in the armature-core7 and thepolarizi n g cllect of said secondary currents will be concentrated on opposite sides ol.' the core in line with the connnutator-brushes.

By the employment: oi' unconn n u tated closed circuits ll', in addition to the ordinaryT winding` lil, `greater 1nagiietizing-currents can. be employed with less heating, wear, and destruction ot eonnnntatoi.' and brushes than il:` all the wire upon tl ie armature were wound in asing e connnutated circuit.

.Itis ot' course iinniaterial how the conunutated and unconnnutated coils are arranged upon the connnutator so long as the desired results follow. rlhe said windings inaybe in separate layers, as indicated in 'Fig'. l, or in sections, as in Fig. 2.

ll'hile I have described the invention as appl icd to an arinattue ot' the Grainine type, it will be understood that an arinatliire ot any other continuous-current type niay be enr ployed; also, that the ,torni and. style ol. the field-magnets inay dil'ier troni those herein shown, and it will. also be apparent that the currcntrcrulatine' devices placed in circuit with the connnutatonbrushes in lfig. L nlay be of any l'orin or nature rallenlnted to pro duce the best results.

Any inzrtters herein shown and described but not clainicd continue to l'orln part ot' the parent application.

llaving` described iny invention7 what I clainnand desire to secure. lny'l'ietters latent, is-t l.. An electro-dynainic inotor fiioinprising a suitable feltl-iiizigiiet system enin'gized by altcrnatingor intermittent currents7 and an arinature rotatively lnouiited within the .field ot torce and having a plurality ol.l windings upon its core, a sectional conunutator and` connections hctwcen tfhesectio'ns o1? said coinnu'itator and a portion ot the arniature-uoils, and a suitable circuit spanning the connnutatorlnushes, the remaining` arnnLture-eoils `lorlning a eircuitoi.' circuits closed upon them selves, substantially as described.

2. An clcctro-dynaniic niotor comprising fichi-magnets energized. by alternating or interinittent currentsJ and an armature rota tively nionnted within the [ield ol. torce and. having two wi'l'iding's 'upon its core, the al ternate coils being connected to a sectional conn inutator provided with contact brushes spanned by a suitable conductor, the 'remaining coils J'orining;` local circuits closed upon thcn'iselves, subslantizilly as described.

i5. An electro-dyllainic niotor co'inin'isinc suitable held-magnets energized by aiternatu ingl or intermittent currents, an arinatfurc rotativcly inounted within. the lield ol.' torce ot' said magnets and provided with ctnnliuciors upon its core, a portion thereof being' conneeted to a sectional. eon'inuitator provided with contact-brushes connected. in closed eir-- cuit, thc remaining colnluctinfs upon the :ir-

inature-eore being' arranged and connected to db' li'orin a plurality ot' sepzl-rate closed circuits thercl'or, substantially as dcscrilietfl.

In testimony whereof.' .l hereto al'lix luy sie# nature in presence of two witnesses.

(lIiARl'illS J'. VVAN DlillUlilLE.

\\iitnesses:

.loniN Il". (fuznosnv, tuiixnnas Il. (incusxnn.

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