- #1

PainterGuy

- 940

- 69

- TL;DR Summary
- I was reading on squirrel cage induction motor and couldn't understand how Lenz's law comes into play in this scenario.

Hi,

The shown below, Figure 1, is an interaction of magnetic fields of stator and rotor of a squirrel cage induction motor.

I believe the current is coming out of the squirrel cage bar on the left and entering on the right as is shown below, Figure 2. I have assumed that the bars highlighted in green are shown in Figure 1 and "x" represents current entering the bar and "." shows current coming out of bar.

Lenz's law states that the direction of the current induced in a conductor by a changing magnetic field is such that the magnetic field created by the induced current opposes the initial changing magnetic field.

I don't understand how the induced magnetic field in rotor bar opposes the initial rotating magnetic field of stator. Could you please help me with it?

Thank you!

The shown below, Figure 1, is an interaction of magnetic fields of stator and rotor of a squirrel cage induction motor.

I believe the current is coming out of the squirrel cage bar on the left and entering on the right as is shown below, Figure 2. I have assumed that the bars highlighted in green are shown in Figure 1 and "x" represents current entering the bar and "." shows current coming out of bar.

Lenz's law states that the direction of the current induced in a conductor by a changing magnetic field is such that the magnetic field created by the induced current opposes the initial changing magnetic field.

I don't understand how the induced magnetic field in rotor bar opposes the initial rotating magnetic field of stator. Could you please help me with it?

Thank you!