3D computation of a claw pole permanent magnet machine using a scalar potential formulation Y. Le Menach, S. Clénet, F. Piriou, J. F. Létourneau, P. Viarouge and J. Cros Eur. Phys. J. AP, 11 3 (2000) 175-182 Published online: 15 September 2000 DOI: 10.1051/epjap:2000160