Magnet dimensions

[GriffinRU]

Originally posted by Serum
Well....

the 15 watts won't heat up the copper, but the magnet right? i thought we were talking about magnets?

that is what i am beginning to think as well..

Who gave you this information on the 1 percent gain in efficiency?

Like Mike and I said before, it is about the efficiency in the partial load, somehow you don't seem to understand.

You don't seem to understand what this is about. 1300 watts of 30A is impossible with that 1930/8.

I don't want a needless discussion about this, but please stop spreading this inaccurate information like it's a scientific funded fact.

Now can we please get back on topic?

Ok, I will stop here...

But I did not ignore information about partial load, it just not relative in our case. As I mentioned earlier 1% loss (data from EE lab, modeling, publications…) happens when magnet flux and phases flux mismatch. That only happens under very rare occasions (accelerations, braking, timing…) which for in-runner type motor even less possible.

But where Eddy current losses would be important is in windings, especially the one with core. As you know losses would be driven by RPM and switching frequency.

And as far as topic was about magnets, I thought it would be helpful to lit some light on this dark territory.

Artur