Yes it is the same, but since this is a PM motor, only the one part of the winding which is 90° to spin direction will contribute to torque and the other part does nothing. So it does not matter how you twist the core because the sides have same length.APL wrote: ↑May 14 2020 10:00pmIn (d), I'll extend the core, so that the coil turns are distant, and only the face of the core is having an effect, then rotate
the core 90 degrees at a time. Isn't the flux that the PM sees, and used for torque, the same no matter the direction the
core and coil are turned?
On the pic with the single loop coil you can see the direction on top is vertical (green circles) and on the side it's horizontal or 90° shifted.