Modification of a commutator motor and its operation as a repulsion motor . 15 lag 90° beMnd ^ in pliase and liave a maxir/rum value propor-tional to tliat of ^ as sliomi in Fig, 3. Hiis is tli©E, M, P. produced by transformer action of tlie macMne,. If now tlie bruslies are shifted so as to rest on the ter-minals of another coil wliicli does not enclose the wholeflux the E, M. P. Einduced between brushes will beless and will be proportional to the ammount of flux en-closed by the coil. If the brushes be moved to a coil Bwhich is in line with the flux, the flux enclosed will bezero and the vol
Modification of a commutator motor and its operation as a repulsion motor . 15 lag 90° beMnd ^ in pliase and liave a maxir/rum value propor-tional to tliat of ^ as sliomi in Fig, 3. Hiis is tli©E, M, P. produced by transformer action of tlie macMne,. If now tlie bruslies are shifted so as to rest on the ter-minals of another coil wliicli does not enclose the wholeflux the E, M. P. Einduced between brushes will beless and will be proportional to the ammount of flux en-closed by the coil. If the brushes be moved to a coil Bwhich is in line with the flux, the flux enclosed will bezero and the voltage induced zero. Now it will be seenfrom Fig. 2, that the of flMx. enclosed by any coilwill be proportional to the sine of the angle between thevertical and the plane of tlie coil, therefore we may voritethe e<iuation; E = k sin(3 16 wliere (3 represents tlie angle spoken of above. This istlie equation representing tlie trsmsformer E. M. P. ISlien tlie macliine is in motion it posseses all theclmracteristrics of a generator, that is tlie amatiir© coilsliave induced in tliem an E. M, P. due to tlieir cutting ofthe field f lux ^ . As in the generator this E. M. P. isproportional to the flux and to the rate of i
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