Motar Servo

Kalmar "servo" ta samo asali ne daga kalmar Girkanci ma'ana "bawa". Ana iya fahimtar "servo motor" a matsayin injin da ke bin umarnin siginar sarrafawa gaba ɗaya: kafin a fitar da siginar sarrafawa, rotor yana nan a tsaye; lokacin da aka fitar da siginar sarrafawa, rotor yana fara juyawa nan take; lokacin da siginar sarrafawa ta ɓace, rotor yana tsayawa nan take. Motar servo ƙaramin injin ne da ake amfani da shi azaman mai kunna wuta a cikin na'urorin sarrafawa ta atomatik. Aikinsa shine canza siginar lantarki zuwa canjin kusurwa ko saurin kusurwa na shaft mai juyawa. Motar servo kuma ana kiranta da injin mai kunna wuta kuma ana amfani da ita azaman mai kunna wuta a cikin tsarin sarrafawa ta atomatik don canza siginar lantarki da aka karɓa zuwa canjin kusurwa ko fitowar saurin kusurwa akan shaft ɗin motar.

An raba injinan servo zuwa manyan rukuni biyu: AC servo da DC servo.

Tsarin asali na motar AC servo yayi kama da na motar AC induction (motar asynchronous). Akwai windings guda biyu masu motsawa Wf da windings masu sarrafawa Wc akan stator, waɗanda kusurwoyin lantarki 90° ke juyawa a sarari. An haɗa su da ƙarfin AC mai ɗorewa. Ta hanyar canza ƙarfin AC ko matakin da aka yi amfani da shi zuwa Wc, ana iya sarrafa aikin motar. Motocin AC servo suna da halaye na aiki mai ɗorewa, ingantaccen sarrafawa, amsawa da sauri, babban ji, da kuma alamun rashin layi don halaye na injiniya da na daidaitawa (suna buƙatar ƙasa da 10% zuwa 15% da ƙasa da 15% zuwa 25%).

Tsarin asali na injin DC servo yayi kama da na injin DC na gaba ɗaya. Gudun motar n = E / K1j = (Ua – IaRa) / K1j, inda E shine ƙarfin lantarki mai juyawa na armature, K shine mai dorewa, j shine kwararar kowace sanda, Ua da Ia sune ƙarfin armature da halin yanzu, kuma Ra shine juriyar armature. Ta hanyar canza Ua ko φ, ana iya sarrafa saurin injin DC servo. Duk da haka, hanyar da aka saba amfani da ita ita ce sarrafa ƙarfin armature. A cikin injinan servo na magnet na dindindin na DC, ana maye gurbin naɗaɗɗen motsawa da maganadisu na dindindin, kuma kwararar φ tana dawwama. Injinan servo na DC suna da kyawawan halaye na tsari na layi da amsawar lokaci mai sauri.