Electromagnetic lub cev muaj zog

Lub tshuab electromagnetic DC yog tsim los ntawm stator ncej, rotor (armature), commutator (feem ntau hu ua commutator), txhuam, vaj tse, bearings, thiab lwm yam.
Lub stator ncej (lub ntsiab ncej) ntawm lub tshuab electromagnetic DC yog tsim los ntawm cov tub ntxhais hlau thiab excitation winding. Raws li cov kev sib txawv excitation (hu ua excitation hauv tus qauv qub), nws tuaj yeem muab faib ua series-excited DC motors, shunt-excited DC motors, cais-excited DC motors thiab compound-excited DC motors. Vim muaj ntau txoj kev excitation, cov kev cai ntawm stator ncej flux (tsim los ntawm stator ncej excitation coil tom qab fais fab mov) kuj txawv.
Lub excitation winding thiab rotor winding ntawm series-excited DC lub cev muaj zog txuas nrog hauv series los ntawm txhuam thiab commutators. Lub excitation tam sim no yog proportional rau armature tam sim no. Lub stator flux nce nrog qhov nce ntawm excitation tam sim no. Lub torque yog kwv yees li proportional rau square ntawm armature tam sim no. Qhov nrawm nrawm nrawm nrog qhov nce ntawm torque lossis tam sim no. Nws pib torque tuaj yeem ncav cuag ntau dua 5 npaug ntawm qhov ntsuas torque, thiab nws lub sijhawm luv luv torque tuaj yeem ncav cuag ntau dua 4 npaug ntawm qhov ntsuas torque. Qhov kev hloov pauv ceev yog qhov loj, thiab tsis muaj kev thauj khoom ceev yog siab heev (feem ntau tsis tso cai khiav hauv qab tsis muaj load). Kev tswj ceev tuaj yeem ua tiav los ntawm kev sib txuas rau sab nraud resistor nyob rau hauv series (los yog nyob rau hauv parallel) nrog rau series-zoo siab winding, los yog los ntawm kev hloov lub series-zoo siab winding nyob rau hauv parallel.
Lub excitation winding ntawm lub shunt-excited DC lub cev muaj zog yog txuas nrog nyob rau hauv parallel nrog lub rotor winding, thiab nws excitation tam sim no kuj tsis tu ncua. Qhov pib torque yog proportional rau lub armature tam sim no, thiab qhov pib tam sim no yog kwv yees li 2.5 npaug ntawm qhov ntsuas tam sim no. Qhov ceev txo me ntsis nrog qhov nce ntawm tam sim no thiab torque, thiab lub sij hawm luv luv overload torque yog 1.5 npaug ntawm qhov ntsuas torque. Kev hloov ceev yog me me, 5% ~ 15%. Qhov ceev tuaj yeem hloov kho los ntawm kev ua kom tsis muaj zog ntawm qhov chaw sib nqus.
Lub excitation winding ntawm nyias DC lub cev muaj zog txuas nrog lub zog ywj siab excitation fais fab mov, thiab nws cov excitation tam sim no kuj tseem tsis tu ncua, thiab qhov pib torque yog proportional rau armature tam sim no. Kev hloov ceev kuj tseem yog 5% ~ 15%. Qhov ceev tuaj yeem nce ntxiv los ntawm kev ua kom tsis muaj zog ntawm cov hlau nplaum tsis tu ncua lossis txo los ntawm kev txo qhov voltage ntawm lub rotor winding.
Ntxiv nrog rau lub shunt winding, stator ncej ntawm lub compound-zoo siab DC lub cev muaj zog kuj tau nruab nrog ib tug series-zoo siab winding (nrog tsawg lem) nyob rau hauv series nrog lub rotor winding. Cov kev taw qhia ntawm cov sib nqus flux generated los ntawm series winding yog tib yam li cov ntsiab winding. Qhov pib torque yog kwv yees li 4 npaug ntawm qhov ntsuas torque, thiab lub sij hawm luv luv overload torque yog li 3.5 npaug ntawm qhov ntsuas torque. Qhov kev hloov pauv ceev yog 25% ~ 30% (txog rau cov kab sib txuas). Qhov ceev tuaj yeem hloov kho los ntawm kev ua kom tsis muaj zog ntawm lub zog sib nqus.
Cov commutator ntu ntawm lub commutator yog ua los ntawm cov ntaub ntawv alloy xws li nyiaj-tooj ​​liab thiab cadmium-tooj ​​liab, thiab yog molded nrog high-lub zog yas. Cov txhuam hniav yog nyob rau hauv zawv zawg sib cuag nrog lub commutator los muab armature tam sim no rau lub rotor winding. Cov txhuam ntawm electromagnetic DC motors feem ntau siv hlau graphite txhuam los yog electroplated graphite txhuam. Lub rotor tub ntxhais yog ua los ntawm laminated silicon steel los xij, feem ntau nrog 12 qhov, thiab 12 txheej ntawm armature windings embedded nyob rau hauv nws. Cov windings txuas nrog hauv series thiab tom qab ntawd txuas mus rau 12 commutator ntu feem.