. The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting . hyconiuctin^r the two motor-circuit> in drri\atioii with tin rin-tiit POL YPHASE CUBREXrS. 97 from the generator, inserting in one motor circuit a dead resist-ance and in the other a self-induction coil, by which means adifference in phase between the two divisions of the current issecured. If both motors have the same nmnber of field poles,the torque motor for a given number of alternations will tend torun at double the speed of the other, for, a
. The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting . hyconiuctin^r the two motor-circuit> in drri\atioii with tin rin-tiit POL YPHASE CUBREXrS. 97 from the generator, inserting in one motor circuit a dead resist-ance and in the other a self-induction coil, by which means adifference in phase between the two divisions of the current issecured. If both motors have the same nmnber of field poles,the torque motor for a given number of alternations will tend torun at double the speed of the other, for, assuming the connec-tions to be such as to give the best results, its poles are dividedinto two series and the number of poles is ^^rtually reduced one-half, which being acted upon by the same nmnber of alternationstend to rotate the armature at t^vice the speed. By this meanstlie main armature is more easily brought to or above the reqidjeds])eed. When the speed necessary for synchronism is impartedto the main motor, tlie cui-ient is shifted from the torque motorinto the othei. A convenient arranoeuieiit for carrvinii out this invention is. Fir:. 78. Fi(i. 7!». shown ill Kig. so, ill wliich .1 .1 arc tin* tii-ld < of the svii-cliroiiizing, and 11 1 the tiehl coils of the toripic motoi-. i. i. areth(^ coiuhictors ()f the main line. ()ne end of, sav, coils 11 is con-iKMtcd to wire I. through a sclt-iiidiiction coil m. ( )iic \\\y\ of theother set of coils i is connected to the same wire tlir<»iigli a dia<lresistance .\. ^ihe o|)posite - (»f thei^e two circuits are con-nected to the contact /// of a switch, the haiulle or lever of whichis in connection with the liiii-wiri 1., ()ne end of tlii field cir-cuit of the s\ nchroiii/.ing motor is coniucted to tin- wiiH- Theother lerniiiiates in the switch-contact //. l-roiii the diagram itwill he leadilv seen that if the lever i he turned upon contact in,the tor(|iie motor will start hv reason of tin* dilTirinee of
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Keywords: ., bookcentury1800, bookdecade1890, bookidinventionsre, bookyear1894
