US620365A - Means for -and wffkcb-cf-elktrtgmotive-foroe regulation - Google Patents

Description

Na. 620,365. .Patnted Feb. 28, |899.

A.N. nuwe. l MEANS FR AND METHOD 0F ELECTRUMOTIVE FORCE REGULATION. (Appumian am 15d. n1, issn.)

(Ne: Model.) 2 Sheds-Shui l.

Ziyi' Patentd Fab. 2a, |899.

N. RWE. MEANS F08 AND NETHUD 0F ELECTROHDTIVE FORCE REGULATION.

ed an.

(Appummn n1 .r 27,1390.)

2 Shoets--Sheei 2.

(No Model.)

/NVENTOH M 'Cwf,

1UNITED STATES PATENT OFFICE.

NORMAN ROWE, OF W'ILKINSBURG, yl?ENNSYLVANIA, ASSIGNOR TO THE WESTINGHOUSE ELECTRIC AND MANUFACTURING COMPANY, F

PENNsYLvANiA.

MEANS FR ANU-aiETHGD-QPELECTilGMOTlVEFORCE HEGULATIGN.

SPEULFIQATION forming part of Letters Patent No. 620,365, dated February 28, 1899.

Y electr-emotive force of the work-circuit.

The object of my invention is to provide a method of and means for increasing or decreasing the workaeirc uit electromotiv'e force gradually over any desired vrange without undue expense and complication as regards either the strnctn re or operation of the appa ratus employed. Y

'Among the I nethods heretofore proposed for varying the electromotive force in alternating-current work-circuits supplied directly by stationary transformers perhaps the most usual is that' which involves varying the active length of either the primary or the secondary transformer-windingbymeansofsuitable switch devices.

In dealing with large transformersand high.

electromotive forces this method involves the employment of either an excessively large and practically prohibitive number of switch contactfpoints and corresponding divisions of the transformer-winding 'or excessively large and abrupt changes in the electrom'otive force between successive divisions of the ,transformenwinding. It has also been proposed to vary the work-circuit electromotive force by means of ,a regulator having two inductively-related windings which may be relstively adjusted in position, so as to magnetlcally vary the electromotive force. This method fails to satisfactorily meet all the requirements of a normally high voltage circuit in which a wide range of variation is desired, chiefly on account of the size and-structure of the regulator which it ,is necessary to employ for such'purpose and the consequent torque to be overcome in operating it.

In order to secure the desired range of regnyeach revolution of switch-arm D'.

pplicatlen Bled J'anulry27,189b Bofill F0. 888,171. (No modul.)

.lation advantageously both as' regards the character of the apparatusemployed and the results eiected, I have devised the method` and means illustrated in the accompanying drawings, in Wh'ich- Figure l is a front elevation of the inductive regnlator, and Fig. 2 a diagram'oflthe entire apparatus employed. Fig. 3 is a diagram illustrating the action of the inductive regulator.

In the drawings, A andI B are the supply alternating-current mains; C, a stationary transformer; D, a stationary switch base or plate; E, an inductive regulator, and F and G the Work-circuit mains.

For the purpose of carrying out myinvention I have shown the switch-plate D as provided with an outer contact-ring d, an inner contactring ci', an outery set. of contact-segments 1, 3, 5, and 7, and s similar set of inner contact-segments 2, 4, 6, and 8,'the segments of each set being spaced apart and alternating, as regards radial position', witli those of the other. A switch-arm D is snitably fastened to one end of a shaft/D2 at the center of the switch-plate D andis provided with two brushes e2 and e. The brush e2 is so' locatedas to make contact with ring CZ 'at all times and also with each of contactsegments 1, 3, 5, and 7 during a portion of The brush eis so .located as' to make contact with ring d' at all times and with each of contact-segments 2, 4, G, and 8 during a portion of each revolution of arm D', the relation of the two sets of segments being snch that each brush comes 'nto contact with a corresponding segment j' st before the other brush breaks Contact with its segment. The

switch-plate D is also .provided with a stoppinf in position to be engaged by a lugf' on thearm D' when the latter, is in either its first or its last position.

' TheA primary c of the transformer C is provided with leads 1, 2*, 3*, fi, 5, 6*, 7, and 8 at regular intervals extending over a portion of its length, which are respectively connected to. the contact-segments 1, 2, 3, 4, 5, 6, 7, and 8. '.Au end= lead 9* constitutes the terminal of the line conductor The wind' '23o primary upon 't cadeau a -ing o f the s'eeo'ndary member e' of 1 the regu- .lator is connected at one :l to ring d and at the other cud to ring d', the latter of which 3, and the the line conductor substantially that movement of switch-arm D' is 'connected across the seccut out that port-ion ofthe.transfonn erpri mary betweenleads 3 and 4*. Il' thefmo'vement of the arm Dbe continued'until its lug f' comes into contact with the stop-pin fon the switchplate D, the line lectromotive `.line electromotive force will be corresponding to lead 4.

g and g and brushes h and h2 As illustrated in Fig. 1 of thc-drawings, the primary members of the regulator Esupports the rings g and g and is mounted upon' the `nlmft Dof the switch, so as to rotate with' it .as the switch-arm' Dis revol'ved.- In the coli- |5 struction shown the regulator has eight magnetic poles; but any other .number that isfound desirable and practicable may be employed by suitably modifying the switching devices.

The operation of my invention isasfollows: .-lssuming. that the switch-arm' D' 'and the inem'bereof the ind notion-regulatorare ln the positions indicated in the drawings, so that the regulator produces a maximumQ-inductive ef- :.5 feet in opposition to the main-line electromotive force, asis indicated at m in Fig. 3, if the' the movable member e of the regulater be turned in aclockwise direction, so as I to gradually vary the inductive eEect of the he secondary to and through zero (represented byzin Fig. 3 to a maximum positive value, (indicated atm in said lign re,) the main-line Fig'.A 2, to point z, corresponding to lead 5.,

and then to point m, 6, then opposed from ing to lead 6*, to. point f, correspondingto lead 7", and then 'boosted td point m7, correspending to lead 8.

fore,l that the line electromotive force is raised by means of progressivelyincrements instead of by means of abranpt steps or jumps,

point m, correspondforce may bedocreased arm D in the opposi ready described. l

If a greater range of 'electromotivel-force regulation is desired than is atforded by-.the construction indicated in the drawings, itmsv obviously be secured by providing the requito the point z and will then gradually increased an equal amount, (represented by the line z m'.) When this maximum, corre spending to point2 in Fig. 2, is reached, 4o brush e2 will be in contact with segment 1 and brush e with segment 2 momentarily. In this positionthe section 1 Zand the windl e'of the regu'- and the switch whereby the switch-arm is intermittingly actuated when the movable memvber of the regulator reaches the proper position for cutting a section of the transformerwindinginto or out ofcircnit.

I desire it to be u Aare cutout of circuit. be maintained until brush elreaches segduring this interval the action of E is represented by the broken there being no resulting elfect I claim as my invention` l. yThe method of raisin electromotvefforce supplie bya transformer having a windi ing opposedby is variable,

corresponding which decreases to lead 3f be 'theregnlatorE byan amount Sindicated by the full' C5 ne position of arm is reached,-when its spond'ing toa different length, and. then -ellect 1s m1. From this point the line elecchanging the circuit connections to corre snond to the ladjusted electromotive force. l

tromotive force is boosted until brush ae" 'corresponding 'to lead.

will

roo

means intermediate the induction-regulator .rio

nderstood thatvariation h 2. The method of varying the electromotive I 'force supplied by a transformer having a winding the active length of which is variabile, which consists in first inductvely va- 5 ,rying the electromotive force within limits corresponding to n division of'the winding,-

@the'n cutting such division either into or ont oftpircuit aud'repeating such operations un- .till-he desn'ed change in electromotive force is :o secured.

23.' -The combination with a stationary transformer having a. divided winding, of a switch ;r s`vr'itchcs'for cutting the divisions of the dngiato niet cirl1-itls9aqeasively,

.2i-1l@ 9' 'v'.ly .varying thev electr linotilve'.J1 orce'd" etwenwperations of the tchy'fhicli effe changes in the length of i ,mgl- 7. Y l -In"asyst m'of electrical-distribution, a 2o stationaiyetigl-nsformer in .combination with a's'w'itcli "r'sivitches for varying theactive of'fthe transformerfwindings by successive steps and an inductive regulator for varying,r the electrornotive force between certain of said steps, whereby the working electromotive force is gradually varied be- 4tween maximum and minimum limits.

vte ,thc'next lead in the series prior to connecting such leadwith the'dine conductor.

' In testimony whereof-.I have hereunto subscribed my name thisllith day of January,

NORMAN ROWE. Vitnesses:

JAMES' B. YOUNG, I-I. C. TENER.

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