Cov ncauj lus kom ntxaws tsom xam ntawm DC Servo Tsav

Muaj ob hom kev siv servo lub cev muaj zog, cov uas ua haujlwm ntawm AC lub zog yog hu ua AC servo motors, thiab cov uas ua haujlwm ntawm DC lub zog yog hu ua DC servo motors. Kab lus no tsuas yog muab cov ncauj lus kom ntxaws ntawm DC servo motors.

Lub luag haujlwm ntawm servo lub cev muaj zog yog los hloov cov teeb liab input voltage rau hauv angular displacement lossis angular tshaj tawm tawm ntawm lub ncej. Hauv lwm lo lus, servo lub cev muaj zog yog hais txog lub cev muaj zog uas nws qhov ceev thiab kev taw qhia hloov nrog qhov loj thiab cov kev taw qhia ntawm cov teeb liab input voltage. Servo motors muaj peev xwm nqa tau ib tug npaum li cas ntawm load thiab ua hauj lwm raws li actuators nyob rau hauv tsis siv neeg tswj systems, yog li lawv kuj hu ua executive motors.

 

Cov kev xav tau ntawm kev ua haujlwm rau servo motors hauv kev tswj tsis siv neeg tuaj yeem ua tiav raws li hauv qab no.

 

(1) Tsis muaj qhov tshwm sim ntawm tus kheej tig. Ua ntej tswj lub teeb liab tuaj txog, servo lub cev muaj zog rotor tseem nyob ruaj khov; Tom qab lub teeb liab tswj tau tuaj txog, lub rotor tig ceev ceev; Thaum lub teeb liab tswj tau ploj mus, lub servo lub cev muaj zog rotor yuav tsum tam sim ntawd nres rotating. Qhov tshwm sim ntawm lub cev muaj zog txuas ntxiv tig thaum lub teeb liab tswj yog xoom hu ua "kev sib hloov ntawm tus kheej", thiab tshem tawm kev sib hloov ntawm tus kheej yog qhov tsim nyog rau kev ua haujlwm ntawm kev tswj tus kheej.

(2) Tsawg tsis muaj-load pib voltage. Thaum lub cev muaj zog yog unloaded, lub me me tswj voltage los ntawm lub xeev nyob ruaj ruaj mus tas li ua hauj lwm ntawm lub rotor, tsis hais nws txoj hauj lwm, hu ua qhov pib voltage. Qhov me dua qhov pib voltage, qhov siab dua ntawm lub cev muaj zog.

(3) Lub linearity ntawm txhua yam thiab kev tswj cov yam ntxwv yog zoo, thiab nws muaj peev xwm ntseeg nkaws thiab stably tswj kev ceev ntawm ntau yam.

(4) Ceev thiab teb. Lub sij hawm electromechanical tas li yog me me, yog li servo motors xav tau lub sijhawm me me ntawm inertia.

 

1. Kev faib tawm thiab cov qauv ntawm Dc Servo Motors

 

DC servo lub cev muaj zog yog lub hom phiaj tshwj xeeb DC lub cev muaj zog hauv kev tswj tsis siv neeg. Nws cov qauv tsis yog qhov sib txawv ntawm cov motors DC dav dav, thiab nws tseem muaj ob ntu: stator thiab rotor.

 

Lub luag haujlwm ntawm lub stator yog tsim kom muaj qhov sib nqus tsis tu ncua, thiab cov stator ncej yog nruab nrog excitation windings. Hauv DC servo systems, electromagnetic thiab ruaj khov hlau nplaum DC servo motors feem ntau yog siv. Tam sim no, cov txheej txheem electromagnetic excitation yog ib txoj kev excitation cais, thiab armature thiab excitation winding yog powered los ntawm ob lub zog ywj siab.

 

Lub hollow khob armature ruaj khov hlau nplaum DC servo lub cev muaj zog muaj lub stator sab nrauv thiab sab hauv stator, thiab lub hollow khob armature rotates hauv huab cua sib txawv ntawm sab hauv thiab sab nrauv stator. Lub stator sab nrauv yog ua los ntawm cov khoom siv sib nqus zoo li cov tub ntxhais hlau, uas yog nruab nrog cov ntsiab lus sib nqus (ob lub voj voog sib nqus yog ua los ntawm cov hlau nplaum lossis cov hlau nplaum ntawm cov hlau nplaum sib nqus los tsim N thiab S ncej). Sab hauv stator yog ua los ntawm cylindrical mos magnetic khoom, uas ua hauj lwm raws li ib feem ntawm lub magnetic Circuit Court thiab yuav txo tau magnetic tsis kam. Lub armature yog lub tog raj kheej kheej kheej ua los ntawm cov khoom tsis sib nqus (xws li yas), ncaj qha ntsia rau ntawm lub cev muaj zog. Lub winding tsim los ntawm kev npaj cov khob hollow raws lub voj voog ncig thiab kho lawv nrog epoxy resin. Lub hwj chim mov yog siv rau armature winding los ntawm txhuam thiab diverters. Lub armature core ntev thiab txoj kab uas hla ntawm ib tug raug DC servo lub cev muaj zog yog loj dua cov ntawm ib txwm DC lub cev muaj zog, nrog rau lub hom phiaj ntawm txo nws cov flywheel torque thiab txhim kho cov lus teb ceev.

 

Nyob rau hauv xyoo tas los no, nrog rau kev txhim kho thev naus laus zis, ntau yam tshiab ntawm DC servo motors tau tshwm sim, xws li brushless DC servo motors.

 

2. Txoj Cai Ua Haujlwm ntawm Dc Servo Tsav

 

Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm DC servo motors kuj zoo ib yam li cov motors me me DC. Rau ib qho tshwj xeeb zoo siab DC servo lub cev muaj zog, yog tias qhov kev tawm dag zog tam sim no tau siv rau kev ua kom lub zog sib nqus kom tsim tau qhov chaw sib nqus tas li, lub tshuab hluav taws xob hluav taws xob yuav raug tsim tawm thaum lub armature winding dhau los ntawm qhov tam sim no, ua rau lub rotor tig. Thaum ib qho excitation winding lossis armature winding poob lub zog, lub cev muaj zog tam sim ntawd nres. Los ntawm kev hloov qhov loj thiab cov kev taw qhia ntawm qhov excitation tam sim no, qhov ceev thiab kev taw qhia ntawm lub cev muaj zog tuaj yeem hloov tau kom ua tau raws li kev tswj hwm ntawm servo lub cev muaj zog. Thaum lub load torque yog tas li, ua kom lub armature fais fab mov voltage tas li thiab tswj lub cev muaj zog ceev los ntawm kev hloov cov excitation tam sim no hu ua magnetic teb tswj; Ua kom cov excitation tam sim no tsis tu ncua thiab tswj lub cev muaj zog ceev los ntawm kev hloov lub hwj chim mov voltage hu ua armature control. Vim yog cov yam ntxwv zoo tshaj plaws thiab qhov tseeb ntawm qhov kawg, DC servo motors feem ntau txais kev tswj hwm armature, uas siv armature voltage raws li kev tswj cov teeb liab voltage, thaum sib nqus teb tswj tsuas yog siv rau cov motors qis.

 

Lub hauv paus ntsiab lus ua haujlwm ntawm DC servo lub cev muaj zog yog tib yam li ntawm DC lub cev muaj zog. Thaum lub excitation winding txuas nrog ib qho hluav taws xob tas li, lub armature winding uas tau txais cov teeb liab tswj tau txais cov teeb liab tswj hluav taws xob. Thaum cov tam sim no ntws los ntawm lub armature winding, lub magnetic flux generated los ntawm nws interacts nrog cov magnetic flux generated los ntawm excitation winding los tsim electromagnetic torque, ua rau lub armature tig. Los ntawm kev hloov qhov loj ntawm lub teeb liab tswj qhov hluav taws xob, qhov ceev ntawm lub cev muaj zog tuaj yeem hloov pauv kom ua tiav lub hom phiaj ntawm kev tswj ceev.

 

Thaum siv servo DC servo motors, yuav tsum tau ceev faj hauv qab no:

 

① Thaum siv lub tshuab hluav taws xob hluav taws xob hluav taws xob tswj hwm DC servo lub cev muaj zog, lub zog excitation yuav tsum tau txuas ua ntej, thiab tom qab ntawd cov hluav taws xob hluav taws xob yuav tsum tau siv. Thaum lub sijhawm ua haujlwm, nws raug nquahu kom tsis txhob muaj hluav taws xob tawm ntawm excitation winding kom ntau li ntau tau los tiv thaiv cov khoom siv tam sim no thiab lub cev muaj zog overspeed.

② Thaum xaiv cov ntaub ntawv sib txawv ntawm armature tswj cov khoom siv hluav taws xob, nws yog ib qho tseem ceeb uas yuav tsum tau tawm ntawm qhov tsim nyog ntawm lawv lub peev xwm.