The paper deals with the design of a disc-type motor excited by perman
ent magnets. The main flux is oriented in the axial direction, yieldin
g a pan-cake type arrangement. The outer diameter is about 45 mm, the
axial length about 15 mm. After the introduction, the motor design is
explained. On the basis of these general design considerations, the av
erage flux density at no-load in the materials is approximated using a
n analytical, one-dimensional approach. An accurate analysis of the ax
ial flux machine requires a 3D finite-element calculation. The 3D mode
l design needed for this, is explained The motor characteristics (indu
ced voltage and torque), obtained from the 3D calculation are describe
d and compared with measurements.