Abstract
Transverse Flux Machine (TFM) designs are, in general, based on
3-D Finite Element Methods (FEM). Previous attempts to perform analytical
designs have been limited to Magnetic Equivalent Circuits (MEC). In this paper,
for the first time, propulsion force calculation of TFMs is performed using
an extremely fast analytical model. This allows for fast optimization routines
to be implemented on the complex 3-D TFM structure. The derived analytical
model combines magnetic charge and magnetic imaging techniques to obtain
the magnetic air gap flux density distribution. Further, to allow calculation of
the propulsion force in a direct manner, a suitable current sheet representation
had to be drawn from the TFM structure. This equivalent representation of the
magnetomotiveforce (mmf) in the stator, contained on a 2-D surface at the air
gap centre, allowed the application of Lorentz force to this complex 3-D structure.
This resulted in an analytical technique to accurately calculate propulsion
force with a 2% deviation compared to 3-D FEM when the width of tooth and
PM are similar, although that it does not yet allow for accurate cogging force
calculations. In retrospect, also relatively accurate results, below 10%, are obtained
for the flux density distribution in the air gap centre.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 11th International Conference on Modeling and Simulation of Electric Machines, Converters and Systems (ElectrIMACS 2014), 19-22 May 2014, Valencia, Spain |
| Pages | 220-225 |
| Publication status | Published - 2014 |