Qhov txawv ntawm Servo Tsav thiab Induction Tsav

Qhov txawv ntawm Servo Tsav thiab Induction Tsav
Qhov txawv ntawm Servo Tsav thiab Induction Tsav

Video: Qhov txawv ntawm Servo Tsav thiab Induction Tsav

Video: Qhov txawv ntawm Servo Tsav thiab Induction Tsav
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Servo Tsav vs Induction Tsav

Lub cev muaj zog yog chav kawm ntawm cov khoom siv hluav taws xob uas hloov hluav taws xob hluav taws xob rau hauv lub zog siv tshuab. Hauv qee qhov kev siv, lub zog ntshiab yog xav tau los tsav lub tshuab, thiab hauv qee qhov kev siv, txoj haujlwm thiab kev sib hloov ceev ntawm lub tshuab yuav tsum tau tswj. Induction lub cev muaj zog xa cov ntshiab uncontrolled torque, thaum servo motors xa tswj torque, qhov twg ceev thiab txoj hauj lwm ntawm lub ncej (rotor) tuaj yeem hloov kho.

Ntau txog Induction Motors

Raws li cov hauv paus ntsiab lus ntawm electromagnetic induction, thawj induction motors tau tsim los ntawm Nikola Tesla (hauv 1883) thiab Galileo Ferraris (hauv 1885), ntawm nws tus kheej.

Lub cev muaj zog induction muaj ob qhov tseem ceeb, stator, thiab rotor. Stator nyob rau hauv lub induction lub cev muaj zog yog ib tug series ntawm concentric magnetic ncej (feem ntau yog electromagnets), thiab lub rotor yog ib tug series ntawm kaw windings los yog txhuas rods teem nyob rau hauv ib txoj kev zoo li ib tug squirrel tawb; li no lub npe squirrel tawb rotor. Cov ncej xa cov torque uas tsim los ntawm lub axis ntawm lub rotor. Lub rotor yog muab tso rau hauv lub cylindrical kab noj hniav ntawm lub stator, tab sis tsis muaj hluav taws xob txuas nrog ib qho kev sib txuas sab nraud. Tsis muaj commutator, txhuam hniav, lossis lwm yam kev sib txuas yog siv los muab tam sim no rau lub rotor.

Raws li txhua lub cev muaj zog, nws siv lub zog sib nqus los tig lub rotor. Cov kev sib txuas hauv stator coils yog teem rau hauv ib txoj kev uas cov ncej sab nraud yog tsim los ntawm qhov sib txawv ntawm cov stator coils. Nyob rau theem pib, cov ncej hlau nplaum yog tsim nyob rau hauv ib ntus hloov pauv raws li ib puag ncig. Qhov no tsim ib qho kev hloov pauv ntawm cov flux hla cov windings hauv lub rotor thiab induces ib tug tam sim no. Qhov tam sim no tsim ib qho chaw sib nqus hauv lub rotor thiab kev sib cuam tshuam ntawm stator teb thiab induced teb tsav lub cev muaj zog.

Induction motors yog tsim los ua haujlwm nrog ob qho tib si thiab poly-phase tam sim no; tom kawg rau cov tshuab hnyav uas xav tau lub zog loj. Kev ceev ntawm cov induction motors tuaj yeem tswj tau siv ob qho ntawm cov hlau nplaum hauv stator ncej lossis tswj qhov zaus ntawm cov khoom siv hluav taws xob. Lub plam, uas yog ib qho kev ntsuas los txiav txim siab lub cev muaj zog lub zog, qhia txog kev ua haujlwm ntawm lub cev muaj zog. Txij li thaum lub luv luv-circuited rotor windings muaj me me tsis kam, ib tug me me swb induces ib tug loj tam sim no nyob rau hauv lub rotor thiab tsim loj torque. Txawm li cas los xij, qhov kev sib hloov ceev ntawm lub rotor yog qeeb dua li qhov input zog qhov zaus (los yog tus nqi ntawm kev sib hloov ntawm stator teb). Induction motors tsis muaj kev tawm tswv yim rau kev tswj lub cev muaj zog.

Ntau txog Servo Motors

Technically, lub servo lub cev muaj zog yog txhua lub cev muaj zog uas muaj kev tawm tswv yim thiab kaw lub voj tswj, thiab nws tsuas yog ib feem ntawm lub tshuab servo uas cov lus tawm tswv yim tsis zoo yog siv los tswj kev ua haujlwm ntawm lub cev muaj zog.

Tab sis, feem ntau siv cov servo motors yog ib txwm AC induction motors nrog ntxiv nta xws li Tsawg inertia rotor, siab torque nres, thiab inbuilt encoder rau ceev thiab txoj hauj lwm tawm tswv yim. Tag nrho cov khoom no ua ke ua haujlwm nrog servo tsav. Servomechanisms nrog DC motors feem ntau yog siv hauv xov tooj cua tswj cov cuab yeej, cov cuab yeej ib txwm xav tau lub zog qis thiab siab precision.

Lub DC servo lub cev muaj zog stator feem ntau yog tsim nrog cov hlau nplaum ruaj khov tso rau ntawm 900 ncig lub rotor. Servomotors yog tsim los kom xa cov theem tsis tu ncua ntawm torque thiab muaj inertia tsawg. Cov tswv yim rau lub servomotor yog nyob rau hauv daim ntawv ntawm pulses, thiab nyob rau hauv txhua txhua mem tes, lub cev muaj zog yuav tig los ntawm ib tug finite, pes tsawg tus nqi.

Servo motors tuaj yeem xa cov torque siab thiab txoj haujlwm thiab kev ceev ntawm lub cev muaj zog tuaj yeem tswj tau. Yog li ntawd, servomotors tau siv dav hauv cov neeg hlau thiab tswj cov kev siv cuam tshuam txog kev siv.

Qhov txawv ntawm Induction Tsav thiab Servo Tsav yog dab tsi?

• Servo lub cev muaj qhov kaw lub voj tsis zoo tawm tswv yim thaum lub cev muaj zog dav dav muaj cov tswv yim tawm tswv yim (hauv inbuilt encoder).

• Servomotor ceev thiab txoj hauj lwm tuaj yeem hloov kho thiab tswj nrog ntau dua qhov tseeb thaum, hauv induction motors, tsuas yog qhov ceev tuaj yeem hloov kho.

• Servo motors muaj qis inertia, thaum induction motor rotor muaj inertia ntau dua.

• Servo lub cev muaj zog yog chav kawm ntawm cov motors tswj, thiab nws tuaj yeem ua tau, lub cev muaj zog lossis lwm yam.

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