Re: [femm] voltage gradient

[David Meeker <dmeeker@xxxxxxxx>]

smaïl mezani wrote:
>  Hello folks,
>
> I am trying to compute the starting torque of an
> induction motor.
> When I use the "Total Current" option of "Circuit
> properties" I obtain good results.
> But when I impose a three phase Voltage Gradient, femm
> does not do any calculation? (I attach my femm file).
>
> I have an other question :
> When calculating the torque, DC torque and 100 Hz
> torque (in complex form) are displayed. So what is the
> meaning of the 100 Hz complex torque?
>
> Thank you for any comment.
It looks like the conductivity for your coil regions is assigned to be zero--if
you try to apply a voltage gradient, there will be no current.

Anyhow, I suspect that this isn't really what you are after--if you are modeling
wound coils, you have to stick with defining the current and specifying the
conductivity to be zero--otherwise, the region where the coils are in acts
like a solid bar.

Dave.

--
David Meeker