Lub nplhaib-zoo li tus hlau nplaum ruaj khov yog tsau rau hauvDC lub cev muaj zog, thiab tam sim no dhau los ntawm lub kauj ntawm lub rotor los tsim kom muaj zog ampere. Thaum lub coil ntawm lub rotor nyob rau hauv parallel mus rau lub magnetic teb, cov kev taw qhia ntawm lub magnetic teb yuav hloov yog hais tias nws tseem tig. Yog li ntawd, txhuam ntawm qhov kawg ntawm lub rotor yog hloov dua siab tshiab nrog Cov daim hlau sib txuas, yog li cov kev taw qhia tam sim no ntawm lub kauj kuj hloov, thiab cov kev taw qhia ntawm lub zog Lorentz generated tsis hloov, yog li lub cev muaj zog tuaj yeem tig mus rau hauv ib qho kev taw qhia.
Lub hauv paus ntsiab lus ntawm kev ua haujlwmDC lub tshuab hluav taws xobyog los hloov lub alternating electromotive quab yuam induced nyob rau hauv lub armature coil mus rau hauv ib tug DC electromotive quab yuam thaum nws yog kos los ntawm txhuam kawg los ntawm lub commutator thiab commutation nyhuv ntawm txhuam.
Cov kev taw qhia ntawm induced electromotive quab yuam yog txiav txim raws li txoj cai txoj cai (magnetic teb kab taw tes rau lub xib teg, tus ntiv tes xoo taw tes rau cov kev taw qhia ntawm lub zog ntawm tus neeg xyuas pib, thiab lwm plaub ntiv tes taw tes rau cov kev taw qhia ntawm induced electromotive quab yuam nyob rau hauv tus neeg xyuas pib).
Kev taw qhia ntawm lub zog ntawm tus neeg xyuas pib yog txiav txim siab los ntawm txoj cai sab laug. Ob khub ntawm electromagnetic rog ua ib lub torque ua ntawm lub armature, uas yog hu ua electromagnetic torque nyob rau hauv ib tug rotating hluav taws xob tshuab. Cov kev taw qhia ntawm lub torque yog counterclockwise, nyob rau hauv ib qho kev sim ua kom lub armature tig counterclockwise. Yog tias qhov hluav taws xob hluav taws xob no tuaj yeem kov yeej qhov kev tawm tsam ntawm lub armature (xws li kev tiv thaiv torque tshwm sim los ntawm kev sib txhuam thiab lwm yam load torques), lub armature tuaj yeem tig mus rau hauv kev coj ua counterclockwise.