Ya na da yin da ke koyar da motar induction?

Motoci da 'yan inda yake ita ce wata na motoci da AC da ake amfani da shi sosai. A kan nan zan bayar tabbacin da za a yi game da motoci da 'yan inda yake ita:

1. Tashar

Motoci da 'yan inda yake ita na da muhimman kofin biyu: stator da rotor.

Stator: Stator shine kofin da ba ta gida, tare da iron core da kuma windings na three-phase da ake koyar da su a cikin slots na iron core. Windings na three-phase suna haɗa da sursurin AC na three-phase.

Rotor: Rotor shine kofin da ya gida, tare da bars mai sauƙi (kawai aluminum ko kudanci) da kuma end rings, wanda suka samun tashar squirrel-cage. Tashar wannan shine "squirrel-cage rotor."

2. Addinin Yawanci

2.1 Tsara Magnetic Field Mai Gida

Sursurin AC na Three-Phase: Idan sursurin AC na three-phase an haɗa da windings na stator, za a gina currents mai gida a windings na stator.

Magnetic Field Mai Gida: Kamar hukumar Faraday ta electromagnetic induction, currents mai gida a windings na stator suna tsara magnetic field mai gida. Saboda sursurin AC na three-phase na da farkon lokaci 120 degrees, wannan magnetic fields suna sauyi don tsara magnetic field mai gida. Yadda da yanayi da keke da wannan magnetic field mai gida suna daidaita da frequency na sursuri da kuma tashar windings.

2.2 Induced Current

Cutting Magnetic Flux Lines: Magnetic field mai gida yana kasa magnetic flux lines a conductors na rotor. Kamar hukumar Faraday ta electromagnetic induction, wannan yana tsara electromotive force (EMF) a conductors na rotor.

Induced Current: EMF mai tsara yana gina current a conductors na rotor. Saboda conductors na rotor suna da tashar loop mai sarrafa, induced current yana gira a conductors.

2.3 Tsara Torque

Lorentz Force: Kamar hukumar Lorentz, interaction bayan magnetic field mai gida da induced current a conductors na rotor yana gina force, wanda yake sa rotor gida.

Torque: Wannan force yana tsara torque, wanda yake sa rotor gida a arewa da magnetic field mai gida. Speed na rotor yana da dama da synchronous speed na magnetic field mai gida saboda slip yana da kyau don tsara induced current da kuma torque masu daidai.

3. Slip

Slip: Slip shine farkon synchronous speed na magnetic field mai gida da actual speed na rotor. Ana nufin shi da formula:

Amsa:

s shine slip ns shine synchronous speed (a revolutions per minute)

nr shine actual speed na rotor (a revolutions per minute)

Synchronous Speed: Synchronous speed

ns ana tsara ne daga frequency

f na sursuri da kuma number of pole pairs

p a motor, ana gina shi da formula:

4. Kyakkyawan

Starting Characteristics: A baya da startup, slip yana da dama 1, da induced current a conductors na rotor yana da damu, wanda yake tsara starting torque masu damu. Idan rotor yake ci, slip yana daɗe, da induced current da kuma torque yana daɗe.

Running Characteristics: A cikin steady-state operation, slip yana da damu (0.01 zuwa 0.05), da speed na rotor yana da dama da synchronous speed.

5. Applications

Motoci da 'yan inda yake ita suna amfani da su a wurare da industrial da household applications saboda tashar da suka daɗe, addinin yawancin da suka daɗe, da kuma kula da su kaɗanta. Applications masu yawan amfani sun hada da fans, pumps, compressors, da kuma conveyor belts.

Summary

Addinin yawancin motoci da 'yan inda yake ita shine kamar hukumar electromagnetic induction. Magnetic field mai gida yana tsara ne daga sursurin AC na three-phase a windings na stator. Wannan magnetic field mai gida yana tsara current a conductors na rotor, wanda yake tsara torque, wanda yake sa rotor gida.