Imoto yeServo

Igama elithi “servo” livela kwigama lesiGrike elithetha “ikhoboka”. “Imoto ye-servo” inokuqondwa njengemoto ethobela ngokupheleleyo umyalelo wesignali yokulawula: ngaphambi kokuba isignali yokulawula ikhutshwe, i-rotor ihlala imile; xa isignali yokulawula ikhutshwa, i-rotor iqala ukujikeleza ngoko nangoko; xa isignali yokulawula inyamalala, i-rotor iyeka ukujikeleza ngoko nangoko. Imoto ye-servo yimoto encinci esetyenziswa njenge-actuator kwizixhobo zokulawula ngokuzenzekelayo. Umsebenzi wayo kukuguqula imiqondiso yombane ibe yi-angular displacement okanye i-angular velocity ye-rotation shaft. Imoto ye-servo ikwaziwa njenge-actuator motor kwaye isetyenziswa njenge-actuator kwiinkqubo zolawulo ngokuzenzekelayo ukuguqula imiqondiso yombane efunyenweyo ibe yi-angular displacement okanye i-angular velocity output kwi-motor shaft.

Iimoto zeServo zahlulwe zibe ziindidi ezimbini eziphambili: i-AC servo kunye ne-DC servo.

Ulwakhiwo olusisiseko lwemoto ye-AC servo lufana nolwemoto ye-AC induction (imoto engatshintshiyo). Kukho ii-windings ezimbini ze-excitation Wf kunye nee-windings zolawulo ze-Wc kwi-stator, ezifuduswa ngokwendawo zii-engile zombane ezingama-90°. Ziqhagamshelwe kwi-voltage ye-AC engaguqukiyo. Ngokutshintsha i-voltage ye-AC okanye isigaba esisetyenziswa kwi-Wc, ukusebenza kwemoto kunokulawulwa. Iimoto ze-AC servo zineempawu zokusebenza okuzinzileyo, ukulawula kakuhle, ukuphendula ngokukhawuleza, uvakalelo oluphezulu, kunye nezibonakaliso ezingqongqo ze-nonlinearity kwiimpawu zoomatshini nezokulawula (ezifuna ngaphantsi kwe-10% ukuya kwi-15% kunye ngaphantsi kwe-15% ukuya kwi-25% ngokwahlukeneyo).

Ulwakhiwo olusisiseko lwemoto ye-DC servo lufana nolwemoto ye-DC eqhelekileyo. Isantya semoto n = E / K1j = (Ua – IaRa) / K1j, apho u-E ligunya le-electromotive elibuyela umva le-armature, u-K li-constant, u-j yi-flux nge-pole, u-Ua kunye no-Ia zii-voltage ze-armature kunye nomsinga, kwaye u-Ra li-resistance ye-armature. Ngokutshintsha i-Ua okanye i-φ, isantya semoto ye-DC servo sinokulawulwa. Nangona kunjalo, indlela eqhelekileyo kukulawula i-voltage ye-armature. Kwiimoto ze-DC servo ze-magnet ezisisigxina, i-excitation winding ithathelwa indawo ziimagnethi ezisisigxina, kwaye i-flux φ i-constant. Iimoto ze-DC servo zineempawu ezilungileyo zokulawula umgca kunye nokuphendula kwexesha ngokukhawuleza.