Injini yeServo

Igama elithi “servo” livela egameni lesiGreki elisho “isigqila”. “Injini ye-servo” ingaqondwa njengenjini elalela ngokuphelele umyalo wesignali yokulawula: ngaphambi kokuba kukhishwe isignali yokulawula, i-rotor ihlala ingashintshi; lapho kukhishwa isignali yokulawula, i-rotor iqala ukujikeleza ngokushesha; lapho isignali yokulawula inyamalala, i-rotor iyeka ukujikeleza ngokushesha. Injini ye-servo iyinjini encane esetshenziswa njenge-actuator kumadivayisi okulawula okuzenzakalelayo. Umsebenzi wayo ukuguqula izimpawu zikagesi zibe yi-angular displacement noma i-angular velocity ye-rotation shaft. Injini ye-servo yaziwa nangokuthi i-actuator motor futhi isetshenziswa njenge-actuator ezinhlelweni zokulawula okuzenzakalelayo ukuguqula izimpawu zikagesi ezitholiwe zibe yi-angular displacement noma i-angular velocity output ku-motor shaft.

Ama-motor e-Servo ahlukaniswe ngezigaba ezimbili ezinkulu: i-AC servo kanye ne-DC servo.

Isakhiwo esiyisisekelo semoto ye-AC servo sifana nemoto yokungenisa i-AC (imoto engahambisani). Kunezimbobo ezimbili zokuvuselela i-Wf kanye nezimbobo zokulawula i-Wc ku-stator, ezisuswa endaweni ngama-engeli kagesi angu-90°. Zixhunywe ku-voltage ye-AC engaguquki. Ngokushintsha i-voltage ye-AC noma isigaba esisetshenziswa ku-Wc, ukusebenza kwemoto kungalawulwa. Ama-AC servo motors anezici zokusebenza okuzinzile, ukulawula okuhle, ukuphendula okusheshayo, ukuzwela okuphezulu, kanye nezinkomba eziqinile zokungalandeli kahle izici zemishini nezokulawula (ezidinga ngaphansi kuka-10% kuya ku-15% kanye ngaphansi kuka-15% kuya ku-25% ngokulandelana).

Isakhiwo esiyisisekelo semoto ye-DC servo sifana nesemoto ejwayelekile ye-DC. Ijubane lemoto n = E / K1j = (Ua – IaRa) / K1j, lapho u-E eyisithako se-armature reverse electromotive force, u-K uyinto engaguquki, u-j uyisithako nge-pole, u-Ua no-Ia bangugesi we-armature kanye nogesi, kanti u-Ra uyisithako se-armature. Ngokushintsha u-Ua noma u-φ, ijubane lemoto ye-DC servo lingalawulwa. Kodwa-ke, indlela evamile ukulawula i-armature voltage. Kuma-premature magnet DC servo motors, i-excitation winding ithathelwa indawo yi-permature magnets, kanti i-flux φ ayiguquki. Ama-DC servo motors anezici ezinhle zokulawula eziqondile kanye nokuphendula kwesikhathi okusheshayo.