Development and Analysis of Tubular Transverse Flux Machine With Permanent-Magnet Excitation

The magnetic field computation and performance characteristics analysis for a tubular transverse flux machine (TFM) with permanent-magnet excitation have been discussed. The following issues have been emphasized: construction of the tubular TFM, magnetic flux distribution, winding back electromotive force, winding inductance, and thrust force. The topology of such a machine requires a 3-D finite-element method to accurately predict the machine performance. The simplified computation model is proposed in order to save the computing time. The experimental setup has been developed. The calculated results and the measured results are in good agreement. Thus, the validity of the simplified computation model is indirectly proved. The thrust-force capabilities of the tubular TFM are compared with other topologies of linear machines. The technology of the tubular machine could be enriched.