The U.S. Patents of Nikola Tesla

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It will-be understood from the above de* 95 scription that the generator-armature may be run thbdirectioP ofthe shifting the mag­ netic poles, but more rapidly, and that such case the speed the motor willbe equal to the difference between the two rates. The system ofelectrical distribution con- 125 sisting the combination,,-with alternat­ ing’ -current generator-haying independent energizing-coils'and^an armatnre wound with independent induced cbils^ufan. movement,of the magnetic poles the annu­ li; lar field-core the generator, the shifting or rotary movement said poles being synch­ ronous with the rotation the exciter-arma? tare. For example, the poles are turnedtwbthousand 55 times per unit time and the armature is turned eight hundred, the motor will turn twelve hundred times, nearly so. It will observed connection with this system that diminishing the resistance of the external circuit the generator-armature 75 by checking the speed the motororbyadd­ ing translating devices multiple arc the secondarycircuitorcircuits thetransformer 'the strength the current the armature- circuit greatly increased. 3.. practicability.alternating- current exciter having indnced'-eoilgcorre- 130 spondiug toand connected with the ener^zing- coils the generator, and one more eleari- cal converters having independent inducing or energizing cqíIs connected with the corre- . alternating-current generator, the • combination the elements named and co­ operatively associated^in the following man- U5 ner: field-maguet wound with independent coils rach connected witha sourceof alteřnat- ; ingcurrents, whereby the magnetic poles pro­ duced said coils will progressively shifted moved through the field, and 120 armature-rare wound with independent coils, , each-having terminals from which currents are delivered tbe independentexternal cir­ cuits.as energize ; the field the generator the armature the latterfif left free turn, would rotate a speed practically the same that the ex­ citer. 2.claim is— 105^ 1. 60 Let now assumedthatpower applied to the generator-armature turn di­ rection opposite that which its magnetic póies rotate. coils F 15 the generator-armatnre closed upon themsělVes short-circuited, currents, at least theoretically, will generated the Said armatnre-coils. Very slight differencesof speed may indicatedby a delicately-balanced motor.. under such conditions the. results from this that the operationof the exciterproducesaprogressive . ' What I. Thisis due td'O 80 causes: first, the great differences the speeds the motor and generator, and, sec­ ondly, the fact that the apparatus follows the analogy transformer, for, propor­ tion the resistance the armature sec* . practice have ob­ served the presence slight currents, the ex- 20 istence ofwhich attributableto moreorless pronounced fluctuationsin theintensify the magneticpoles the generator-ring. The greater the 35 speed rotation the magnetic poles rela­ tively that the armature the more rap­ idly the currents developed the coils the latter will follow one auQther, and the more rapidly the motor will revolve response 40 thereto,and this continues until the armature- generator stopped entirely, brake, when the motor, properlyconstructed, runs at fhe same speed with which the magnetic poles the generator rotate.BESTAVAILABLECOP' ft 390.m the other coils O ' the exciter and of the generator. iod In manyapplicationstoelectricalconversion and distribution this system possesses great advantages both economy, efficiency, and . 50 netic poles of.ondingto and connected withthe energizing- coils the generator, set forth. the generator; hence the speed of the motor-arinatnrewill depend allcases upon the relative speeds the armature of the generator and its magneticpoles.ro- 30 tation the poles the field:becomes rela­ tively more rapid, currents will inducedin the armature-coils. The combination,with alternating-cur­ rent generator baviqg independent energizing or field and independent induced arma­ ture coils, alternating -current exciter-, having generating induced coils corre- a sp. This obviously follows from the passing'of the lines force, across the armature -conductors. 45 The effective strength thecurrents devel­ oped the armatnre-coils of:the generator is dependent upon the strength the currents energizing the generator and upon the num­ ber rotations per unit time the mag-. such case the result would be similar that produced generator the 65 armature and field-magnets which are ro­ tated opposite directions, and reason of these conditions the ráotor-arraature will turn at rate speed equal the sum the speeds the armature and magnetic poles of the generator, that comparatively low 70 Speed the generator-armature will produce a high speed the motor. So, if the armature-coils closed through the motor, the latter will ndtbe turned longas 25 the movement the generator-armature is synchronouswith that the exciter the maguetič poles its field. Consideringthe operative conditionsof a System thus established, will foundthat io when the exciter driven so. ondary circuits reduced, thestrength the cqrrentS the field orprimary circuits ofthe generator increased and the-currents the armature augmented correspondingly. If, the eop- trary, the speed the generator-armattffe be in any way checked,so thatthe shiftingbr. For - similar reasons the currents the armature- 90 coils the generator increase very rapidly when the speed the armatureis rednoed: when running the same direction the - magnetic poles orconversely