Nyob rau hauv ib tug series DC lub cev muaj zog, armature winding thiab teb winding yog txuas nrog nyob rau hauv series, thiab cov tam sim no los ntawm lawv yog sib npaug, txij li thaum lub armature winding thiab lub teb winding ntawm ib tug DC parallel motor txuas nyob rau hauv parallel. Tam sim no nyob rau hauv ib tug parallel lub cev muaj zog yog muab faib ua ob qhov chaw: lub tam sim no los ntawm armature thiab tam sim no los ntawm lub teb winding, thiab tag nrho cov tam sim no yog cov sum ntawm ob qhov chaw. Cov qauv ntawm DC shunt lub cev muaj zog yog tib yam li ntawm DC lub cev muaj zog, nws muaj tag nrho cov khoom tseem ceeb xws li stator (field winding), rotor (tseem hu ua armature) thiab commutator.
Stator / Parallel Winding
Lub zog input yog nkag mus rau cov khoom ruaj khov ntawm lub cev muaj zog, uas yog, qhov sib npaug winding. Lub shunt winding muaj ob peb lem ntawm winding ntawm lub kauj. Txij li thaum tus naj npawb ntawm cov lem muaj cov xov hlau nyias nyias, qhov loj ntawm qhov sib npaug winding yog me me heev. Tsis zoo li cov hlau diameters nyob rau hauv windings ntawm series lub cev muaj zog, lub parallel windings nyob rau hauv no lub cev muaj zog tsis tuaj yeem nqa tam sim no loj heev.
Rotor / armature
Lub armature, feem ntau hu ua "rotor", tuav cov ncej load, thiab nws muaj ib tug tuab hlau txoj kab uas hla uas yuav pab tau ntau dua tam sim no. Thaum lub cev muaj zog pib los yog khiav ntawm qis ceev, siab tam sim no ntws los ntawm armature. Raws li qhov ceev ntawm lub cev muaj zog nce, lub armature generates counter-electromagnetic quab yuam, uas ua rau cov tam sim no nyob rau hauv armature.
commuator
Cov khoom siv xws li commutators thiab txhuam muab tam sim no los ntawm qhov chaw zoo li qub windings mus rau rotor, thiab lub zog ntawm lub cev muaj zog yog tsim los ntawm kev sib cuam tshuam ntawm cov hlau nplaum ntawm cov windings thiab armature.
txoj cai ua haujlwm
Thaum qhov hluav taws xob nkag mus rau lub cev muaj zog DC lub cev muaj zog, nws tsim cov tam sim no tsawg heev vim muaj qhov ua haujlwm siab ntawm kev sib nqus winding, thiab ntau qhov kev hloov pauv ntawm qhov sib nqus winding pab tsim kom muaj zog sib nqus. Lub armature kos ib tug siab tam sim no, uas ua rau ib tug high magnetic teb. Thaum cov magnetic teb ntawm armature thiab parallel windings cuam tshuam, lub cev muaj zog pib tig. Raws li cov magnetic teb nce, lub rotational torque nce, uas ua rau ib tug nce nyob rau hauv lub ceev ntawm lub cev muaj zog.
Parallel DC motors muaj lub tswv yim tawm tswv yim uas tswj qhov nrawm, thiab thaum lub armature tig hauv qhov sib nqus, ib qho tam sim no raug tsim. Qhov no electromotive quab yuam yog generated nyob rau hauv opposite kev taw qhia, li no limiting lub armature tam sim no. Yog li ntawd, tam sim no los ntawm armature yog txo thiab qhov ceev ntawm lub cev muaj zog kuj tuaj yeem tswj tus kheej. Parallel windings, vim lawv txoj kev siv hlau nyias, tsis tuaj yeem tiv taus lub siab pib tam sim no ntawm series motors, yog li cov cav sib txuas tau siv los tswj cov khoom me me uas pib tsuas yog xav tau qis dua.
Tsav ceev
Nyob rau hauv ib tug series lub cev muaj zog, qhov ceev nyob ntawm tus ncej load, thiab nyob rau hauv ib tug series lub cev muaj zog, lub load yog inversely proportional rau lub armature ceev. Yog hais tias lub load yog siab, lub armature yuav tig ntawm tsawg ceev. Yog hais tias lub load yog tsawg, lub armature ceev yuav nce. Qhov ceev ntawm armature yog infinite los yog uncontrolled ntawm tsis muaj load.
Tsis zoo li series motors, qhov ceev ntawm cov motors thaum uas tig mus yog ywj siab ntawm ncej load, thiab raws li lub cev muaj zog load, qhov ceev ntawm lub cev muaj zog yuav qeeb qeeb. Kev qeeb qeeb yuav txo qhov rov qab EMF, uas ua rau cov tam sim no nyob rau hauv armature ceg, uas ua rau muaj kev nce hauv lub cev muaj zog. Ntawm qhov tod tes, yog tias cov load raug txo, lub cev muaj zog yuav nce ib ntus, uas yuav ua rau kom rov qab EMF, yog li txo qhov tam sim no ntws mus rau lub cev muaj zog. Maj mam, lub cev muaj zog yuav qeeb. Yog li ntawd, DC parallel lub cev muaj peev xwm tswj tau qhov ceev ceev tsis hais txog kev hloov pauv. Vim qhov no feature, lub cev muaj zog yog siv nyob rau hauv automotive thiab industrial daim ntaub ntawv qhov twg lub cev muaj zog ceev yuav tsum tau.
Tsav ceev tswj
Qhov ceev ntawm DC shunt lub cev muaj zog tuaj yeem tswj tau ob txoj hauv kev:
Los ntawm kev hloov cov khoom tam sim no rau lub rotor
Los ntawm kev hloov cov khoom tam sim no rau stator
Txij li thaum qhov hluav taws xob nyob ib ncig ntawm lub rotor thiab stator yog tib yam, qhov ceev ntawm lub cev muaj zog tuaj yeem tswj tau los ntawm kev tswj cov tam sim no los ntawm stator lossis rotor, kev hloov nws qhov tsis kam yog feem ntau tswj tau siv lub thyristor. Qhov tsis kam ntawm qhov sib npaug winding thiab cov ceg armature tuaj yeem nce lossis txo los ntawm kev sib txuas ntawm varistor hauv koob. Txij li thaum tam sim no tuav los ntawm armature yog ntau dua li ntawm lub teb winding, lub varistor uas tswj cov tam sim no nyob rau hauv armature ceg yog loj heev, uas yog dab tsi nyob rau hauv lub teb winding. Yog vim li cas vim li cas tam sim no-tswj rheostats nyiam dua.
Lub shunt teb tam sim no tuaj yeem hloov qhov ceev ntawm lub cev muaj zog los ntawm 10-20 feem pua , thiab raws li qhov tam sim no los ntawm qhov sib npaug windings nce, qhov ceev ntawm lub rotor nce, tsim kom muaj zog rov qab EMF kom muaj qhov sib npaug ntawm qhov sib npaug ntawm qhov tam sim no. Hloov pauv, los ntawm kev txo qhov tam sim no los ntawm kev sib txuas windings, qhov ceev ntawm lub cev tuaj yeem raug txo.
Thaum lub sijhawm sib npaug DC lub cev muaj zog khiav ntawm qhov hluav taws xob qis dua nws qhov ntsuas hluav taws xob, nws qhov ceev kuj tseem txo qis, tab sis qhov no ua rau lub cev muaj zog DC lub cev tsis muaj zog thiab muaj kev nyiam rau overload thiab overheat. Feem ntau hais lus, hluav taws xob motors muaj qhov ntsuas ceev hauv cov ntsuas ceev thiab ntsuas hluav taws xob. Thaum lub cev muaj zog DC lub cev muaj zog qis dua nws qhov hluav taws xob tag nrho, nws lub zog txo qis, yog li ntawd, nws raug nquahu kom tsis txhob khiav lub cev muaj zog hauv qab qhov ntsuas qhov ntsuas.
nyob rau hauv xaus
Vim lawv txoj kev tswj tsis siv neeg ceev ceev, DC shunt motors yog qhov zoo tagnrho rau cov ntawv thov uas yuav tsum tau muaj kev ceev ceev ceev, lawv tsis tuaj yeem tsim lub zog pib siab, yog li cov load thaum pib yuav tsum me me. Cov ntawv thov uas ua tau raws li cov qauv no thiab tsim nyog rau DC shunt motors suav nrog cov cuab yeej siv tshuab (xws li lathes thiab grinders) thiab cov cuab yeej siv (xws li kiv cua thiab compressors), centrifugal twj, elevator, looms, lathes, blowers, kiv cua, conveyors, spinning machines Tos.
