Learning Forum

[20171437]

I am curious as to why 0 current is applied to the magnet when simulating a permanent magnet motor.

[Aravind Babu]

It is to make sure that the induced eddy currents are seen only in the magnet. In 2D the calculated eddy current is only seen in the Z axis, so it can be misinterpreted as a current flow, when in reality it's just scattered current loops in the material. So we assign zero current to force direct flow to be zero

[20171437]

First of all, thank you for your kind reply.

Do you mean that the magnet also has conductivity, so it will automatically create a current loop within the simulation program?

And I don't really understand what you can see on the z-axis in the 2D analysis and the story that it can be confused with eddy currents.

I'd appreciate it if you could explain it in a little more detail.