Qhov txawv ntawm Brushless DC Motors thiab Stepper Motors

Lub cev muaj zog DC brushless (BLDC, tseem hu ua lub tshuab hluav taws xob sib txuas (ECM lossis EC lub cev muaj zog) lossis synchronous DC lub cev muaj zog) yog lub tshuab hluav taws xob synchronous uas siv hluav taws xob ncaj qha (DC) lub zog. Qhov tseem ceeb, lub cev tsis muaj zog DC yog lub tshuab hlau nplaum ruaj khov synchronous nrog txoj haujlwm tawm tswv yim, siv DC lub zog nkag thiab lub inverter los hloov nws mus rau peb -theem AC zog.

Muaj ntau hom motors, tab sis lub brushless DC lub cev muaj zog tam sim no yog qhov zoo tshaj plaws ceev ceev - tswj lub cev muaj zog. Nws muab cov txiaj ntsig zoo ntawm ob lub DC thiab AC motors, muaj qhov zoo ntawm kev hloov kho ntawm DC motors thiab cov qauv yooj yim, tsis muaj kev sib txuas, kev lag luam txhim khu kev qha, thiab yooj yim ntawm kev saib xyuas ntawm AC motors. Yog li ntawd, nws yog dav txais tos nyob rau hauv kev ua lag luam thiab siv nyob rau hauv tsheb, khoom siv hauv tsev, khoom siv, thiab lwm yam teb.

Stepper lub cev muaj zog yog qhib- lub voj voog tswj lub cev muaj zog uas hloov hluav taws xob pulse signals mus rau hauv lub kaum sab xis lossis tawm mus; nws tseem hu ua pulse motor. Nyob rau hauv tsis yog - overload tej yam kev mob, lub cev muaj zog qhov ceev thiab nres txoj hauj lwm nyob ntawm seb lub zaus thiab pes tsawg tus mem tes signals, thiab tsis cuam tshuam los ntawm load hloov. Thaum tus tsav tsheb stepper tau txais lub teeb liab mem tes, nws tsav lub stepper lub cev muaj zog tig lub kaum sab xis nyob rau hauv ib qho kev taw qhia, hu ua "step angle." Stepper lub cev muaj zog rotates ib kauj ruam ntawm cov ces kaum. Lub angular hloov chaw tuaj yeem tswj tau los ntawm kev tswj cov naj npawb ntawm cov pulses, yog li ua tiav qhov chaw ua haujlwm. Nyob rau tib lub sijhawm, qhov ceev thiab nrawm ntawm lub cev muaj zog tuaj yeem tswj tau los ntawm kev tswj cov mem tes zaus, yog li ua tiav cov kev cai ceev. Stepper motors yog dav siv nyob rau hauv peripheral ntawm cov computers, nrog rau cov tshuab luam ntawv, plotters, thiab disk drives.

Qhov sib txawv tseem ceeb ntawm brushless DC motors thiab stepper motors yog raws li nram no:

1. Brushless DC motors muaj qhov nrawm dua li stepper motors.

2. Cov qauv tsav tsheb ntawm brushless DC motors thiab stepper motors txawv. Brushless DC motors cia siab rau cov khoom siv hluav taws xob sib hloov uas muab los ntawm Hall effect sensors rau qhov chaw thiab tswj kev sib hloov. Stepper motors ncaj qha los ntawm ib zaug -theem mem tes voltages thiab tsis tas yuav Hall effect sensors rau qhov chaw. Lub kaum sab xis tig tuaj yeem ua tau qhov tseeb los ntawm kev tswj cov naj npawb ntawm cov pulses siv rau lub cev muaj zog.

3. Vim yog cov qauv kev tsav tsheb sib txawv, brushless DC motors feem ntau yog siv rau hauv cov ntawv thov uas tsis tas yuav muaj kev tswj xyuas siab. Stepper motors yog siv rau hauv daim ntawv thov uas xav tau kev tswj xyuas siab.

DC brushless motors tuaj yeem muab faib ua peb qhov tseem ceeb:

Cov ntawv thov txuas txuas ntxiv: Feem ntau yog siv rau hauv thaj chaw uas xav tau qee qhov ceev tab sis tsis yog qhov siab, xws li kiv cua, twj tso kua dej, thiab tshuab ziab plaub hau. Cov ntawv thov no kuj qis dua - nqi thiab feem ntau siv qhib - voj tswj.

Daim ntawv thov kev sib txawv ntawm kev thauj khoom: Feem ntau siv rau hauv cov ntawv thov uas qhov ceev yuav tsum sib txawv nyob rau hauv ib qho chaw, xav tau ntau dua rau cov yam ntxwv ntawm lub cev muaj zog thiab lub sijhawm teb dynamic. Cov khoom siv hauv tsev xws li tshuab ziab khaub ncaws thiab compressors yog cov piv txwv zoo, xws li cov twj tso kua mis tswj, hluav taws xob tswj, thiab lub cav tswj hauv kev lag luam tsheb. Cov ntawv thov no muaj tus nqi qis dua.

Cov ntawv thov tso npe: Feem ntau cov ntawv thov kev lag luam thiab kev tswj tsis siv neeg poob rau hauv pawg no. Cov ntawv thov no feem ntau koom nrog kev hloov hluav taws xob, yog li xav tau cov lus teb tshwj xeeb dynamic thiab torque, thiab muab qhov xav tau siab dua ntawm tus maub los. Photoelectric sensors thiab synchronization li yuav siv tau rau kev ntsuas ceev. Kev tswj cov txheej txheem, kev tswj xyuas tshuab, thiab kev tswj kev thauj mus los yog ntau yam kev siv hauv pawg no.

Cov yam ntxwv tseem ceeb ntawm stepper motors muaj xws li:

1. Qhov tseeb ntawm lub cev muaj zog stepper yog 3-5% ntawm lub kaum sab xis, thiab qhov tseeb no tsis suav nrog. 2. Qhov siab tshaj qhov tso cai qhov kub ntawm lub tshuab stepper.

Overheating lub stepper lub cev muaj zog yuav xub ua rau cov khoom sib nqus kom demagnetize, ua rau kom txo qis torque thiab txawm tias poob ntawm cov kauj ruam. Yog li ntawd, qhov siab tshaj plaws tso cai saum npoo ntawm lub cev muaj zog nyob ntawm qhov demagnetization point ntawm cov khoom sib nqus. Feem ntau, qhov demagnetization point ntawm cov ntaub ntawv sib nqus yog siab dua 130 degrees Celsius, thiab qee qhov txawm mus txog 200 degrees Celsius. Yog li ntawd, qhov kub thiab txias ntawm 80-90 degrees Celsius yog zoo kawg nkaus rau ib tug stepper motor.

3. Lub torque ntawm stepper lub cev muaj zog txo qis raws li qhov ceev nce.

Thaum lub zog stepper tig, qhov inductance ntawm txhua theem winding ua rau lub zog rov qab electromotive (EMF). Qhov siab dua qhov zaus, qhov ntau dua qhov rov qab EMF. Raws li nws cov kev cuam tshuam, theem tam sim no txo ​​qis raws li qhov zaus (lossis ceev) nce, ua rau txo qis ntawm lub zog.