Electromagnetic DC lub cev muaj xws li stator magnetic ncej, rotor (armature), commutator (feem ntau hu ua commutator), txhuam, casing, bearing thiab lwm yam, stator magnetic ncej (lub ntsiab sib nqus ncej) ntawm electromagnetic DC motor yog tsim los ntawm core thiab excitation. winding. Raws li qhov sib txawv excitation (tus qauv qub hu ua excitation), nws tuaj yeem muab faib ua series excitation DC motor, shunt DC motor, excitation DC motor thiab complex excitation DC motor. Vim yog hom excitation sib txawv, stator magnetic flux (tsim los ntawm excitation coil ntawm stator magnetic ncej) txawv.
Lub excitation windings ntawm series excitation DC lub cev muaj zog thiab lub rotor windings yog txuas nrog ib tug txhuam thiab ib tug commutator lub excitation tam sim no proportional rau lub armature tam sim no, lub flux ntawm lub stator nce nrog rau qhov nce ntawm excitation tam sim no, lub torque approximation yog proportional. mus rau lub square ntawm lub armature tam sim no, thiab lub rotational ceev txo sai heev nrog rau qhov nce ntawm torque los yog tam sim no. Nws qhov pib torque tuaj yeem ncav cuag qhov ntsuas torque ntawm ntau dua 5 zaug, lub sijhawm luv luv overload torque tuaj yeem ncav cuag qhov ntsuas torque ntau dua 4 zaug, qhov hloov pauv ceev yog qhov loj, tsis muaj kev thauj khoom ceev heev (feem ntau tsis tso cai rau khiav tsis muaj load). Cov kev cai ceev tuaj yeem pom tau los ntawm kev siv cov resistor sab nraud thiab serial excitation windings nyob rau hauv series (los yog nyob rau hauv parallel), los yog los ntawm kev sib txuas cov series excitation windings nyob rau hauv parallel.
Lub excitation windings ntawm shunt DC lub cev muaj zog yog nyob rau hauv parallel nrog lub rotor winding theem, lub excitation tam sim no ntau tas li, qhov pib torque yog proportional rau lub armature tam sim no, thiab qhov pib tam sim no yog li ntawm 2.5 npaug ntawm qhov ntsuas tam sim no. Kev sib hloov ceev qis me ntsis nrog qhov nce ntawm qhov tam sim no thiab lub zog, thiab lub sij hawm luv luv overload torque yog 1.5 npaug ntawm qhov ntsuas torque. Tus nqi hloov pauv ceev me me, rau $ tus lej. Qhov ceev tuaj yeem hloov kho los ntawm kev ua kom lub zog tas li ntawm cov hlau nplaum tsis muaj zog.