theodore0307
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Can someone please help explain to me how an AC induction motor works.
Thanks.
Thanks.
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AC Induction Motors (1 Viewer)
- Thread starter theodore0307
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seventhroot
gg no re
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simply
> there is a rotor and a stator
> the stator is connected to an AC power supply which produces a changing magnetic field
> the rotor is made up of parallel aluminum bars (that looks like a squirrel cage)
> the AC power creates a changing magnetic field that induces eddy currents which causes it to spin in a way that opposes the motion (lenz's law)
> there is a rotor and a stator
> the stator is connected to an AC power supply which produces a changing magnetic field
> the rotor is made up of parallel aluminum bars (that looks like a squirrel cage)
> the AC power creates a changing magnetic field that induces eddy currents which causes it to spin in a way that opposes the motion (lenz's law)
Fizzy_Cyst
Owner @ Sigma Science + Phys Goat
less simply
> there is a rotor and a stator
> the stator consists of three pairs of opposing coils, each connected to a single phase of a three-phase AC power supply which produces an apparent rotating magnetic field
> the rotor is made up of parallel aluminum bars (that looks like a squirrel cage) connected by an end plate
> the apparent rotating magnetic field produces a change in flux on the squirrel cage, which, according to Faraday's Law induces an EMF, this gives rise to eddy currents which flow through adjacent parallel bars, creating a magnetic field to oppose the change in flux which gave rise to the EMF (Lenz' Law)
> Thus an opposing pole is produced within the rotor bars and this creates a force / torque on the rotor which causes the rotor to spin in the same direction as the apparent rotating magnetic field (i.e., chase the field)
Fizzy_Cyst
Owner @ Sigma Science + Phys Goat
Motor Effect - current carrying conductor in external magnetic field will experience a force.
Current is induced into the rotor bars due to Faraday/Lenz (rate of change of flux)
It is this induced current, flowing through the rotor bars which causes the rotor bars to experience a force (and hence torque)
So, it is similar to all other motors, just in this case the current is induced rather than supplied by an external power supply.
Current is induced into the rotor bars due to Faraday/Lenz (rate of change of flux)
It is this induced current, flowing through the rotor bars which causes the rotor bars to experience a force (and hence torque)
So, it is similar to all other motors, just in this case the current is induced rather than supplied by an external power supply.