DC lub cev muaj zog yog lub tshuab hluav taws xob uas hloov cov hluav taws xob ncaj qha tam sim no rau hauv lub zog siv tshuab. Vim nws txoj kev ceev zoo heev - tswj cov yam ntxwv, nws yog dav siv nyob rau hauv hluav taws xob tsav systems. Raws li lawv txoj kev excitation, DC motors tau muab faib ua peb pawg: cov hlau nplaum ruaj khov, sib cais zoo siab, thiab tus kheej - zoo siab. Tus kheej- qeb zoo siab tau muab faib ua peb hom: shunt, series, thiab compound.
Thaum DC lub zog hluav taws xob muab cov khoom siv tam sim no mus rau armature winding ntawm cov txhuam hniav, cov neeg siv hluav taws xob nyob hauv qab stator lub North (N) ncej nqa tam sim no ntws mus rau hauv ib qho kev coj; Raws li txoj cai sab laug - tes, cov neeg xyuas pib tau ntsib lub txee -clockwise torque. Ib yam li ntawd, cov conductors nyob rau hauv qab stator lub South (S) ncej kuj nqa tam sim no ntws nyob rau hauv tib txoj kev thiab, los ntawm tib sab laug-txoj cai txoj cai, kuj raug rau ib tug counter-clockwise torque. Yog li ntawd, tag nrho cov armature winding - uas yog, lub rotor - tig nyob rau hauv ib tug counter-clockwise kev taw qhia, li no converting lub input DC hluav taws xob zog rau txhua yam zog tso zis ntawm lub rotor ncej. Lub cev muaj zog muaj ob yam tseem ceeb: stator thiab rotor. Lub stator muaj lub hauv paus, lub ntsiab sib nqus ncej, interpoles, txhuam los ua ke, thiab lwm yam khoom; lub rotor (armature) muaj cov tub ntxhais armature, armature winding, commutator, rotating ncej, kiv cua txias, thiab lwm yam.
