Wani ɗaya ce ake kira Wound Rotor Induction Motor?

Mai yin da Wound Rotor Induction Motor?

Takardar da wire-wound rotor induction motor

Wire-wound rotor induction motor (ko kuma circular motor ko slip-ring induction motor) yana nufin motoci mai tasiri na gaba da ke cikin kirkiro da ke ciki don bayyana zama masu karfi mai yawa. Kirkiro ta motoci shi ne wire-wound rotor. Saboda haka, an kiran shi kuma da wire-wound rotor ko phase winding induction motor.

Sakamakon da slip ring induction motor ke yi ba shi daidai da sakamakon da rotor ke yi, saboda haka, an kiran shi kuma da asynchronous motor.

Diagram na wire-wound rotor motor

Stator na wire-wound rotor induction motor yana daga cikin stator na squirrel-cage induction motor. Jami'ar pola da rotor ke winda yana daidai da jami'ar pola na stator.

Rotor na da kirkiro na uku da tsayi, wanda kowace tana da slip ring da brush. Brush na da suka bincike karamin current kuma ta koye shi zuwa da daga kirkiro na rotor.

Brush na da suka bincike star connection rheostat na uku. Figure na biyu ya nuna diagram na wire-wound rotor induction motor.

A wire-wound rotor induction motor, karfin zama yana ci gaba da samun external resistance zuwa kirkiro na rotor tunan star-connected rheostat.

Idan sakamakon da motoci ke yi yana ci gaba, resistance na rheostat yana ci rasa. Wannan additional resistance yana ci gaba da rotor impedance, saboda haka, yana ci kawo rotor current.

Babbar da wire-wound rotor induction motor

Rotor resistor/rheostat starts

Slip ring induction motors suna daidai suka babbar da full line voltage zuwa stator terminals.

Rarrabe starting current yana ci gaba da samun variable resistor zuwa kirkiro na rotor. Control resistance yana da muhimmanci a cikin star-connected rheostat. Idan sakamakon da motoci ke yi yana ci gaba, resistance yana ci rasa.

Idan rotor resistance yana ci gaba, rotor current da ke faru yana ci kawo, kamar haka stator current, amma idan haka, karfi yana ci gaba saboda ci gaban power factor.

Kamar yadda aka ambaci, additional resistance a cikin kirkiro na rotor yana iya bayyana slip ring motor don bayyana karfi mai yawa a matsayin starting current mai yauze.

Saboda haka, wire-wound rotor ko slip ring motor zai iya babbar da damar daidai. Idan motoci ke yi a matsayin normal, slip ring zai short out kuma brush zai ci gaba.

Control of speed

Sakamakon da wire-wound rotor ko slip-ring induction motor ke yi yana iya ci gaba da samun resistance zuwa kirkiro na rotor. Wannan method yana da muhimmanci a kan slip-ring induction motors.

Idan motoci ke yi, sakamakon da motoci ke yi yana ci gaba idan full resistor yana da suka bincike a cikin kirkiro na rotor.

Idan sakamakon da motoci ke yi yana ci gaba, voltage mai yawa yana ci gaba a cikin kirkiro na rotor don bayyana karfi da ya danganta, saboda haka, karfi yana ci gaba.

Duk da haka, idan rotor resistance yana ci kawo, sakamakon da motoci ke yi yana ci gaba. Figure na biyu ya nuna speed-torque characteristics na slip ring induction motor.

Kamar yadda aka nuna a figure, idan rotor per phase resistance yana da R1, sakamakon da motoci ke yi yana ci gaba zuwa N1. Torque-speed characteristic na motoci a R yana nuna a blue line.

Idan rotor resistance per phase yana ci gaba zuwa R2, sakamakon da motoci ke yi yana ci gaba zuwa N2. Torque-speed characteristic na motoci a R yana nuna a green line 2.

Abubuwan da wire-wound rotor motor ke da sa

• Karfi mai yawa - Slip ring induction motors suna iya bayyana karfi mai yawa saboda presence of external resistance a cikin kirkiro na rotor.

• Overload capacity mai yawa - Slip ring induction motor na da overload capacity mai yawa da acceleration mai yawan karfi a matsayin heavy load.

• Starting current mai yauze musamman da squirrel cage motors - Additional resistance a cikin kirkiro na rotor yana ci gaba da rotor impedance, wanda yake ci gaba da starting current.

• Adjustable speed - Speed yana iya ci gaba da samun changing the resistance of the rotor circuit. Saboda haka, ana kira shi "variable speed motor".

• Increase power factor

Yadda ake amfani da shi

Wire-wound rotor motors suna amfani a cikin industrial applications masu karfi mai yawa da adjustable speeds, kamar cranes, lifts, and elevators.