Abstract
In this paper, the authors propose an induction type surface or planar motor for smooth two-dimensional drive including rotating operation. The secondary member is composed of the flat conducting plate without directional qualities and the back-iron plate as secondary yoke. The primary member is composed of the toroidal core and the armature winding which can be supplied the current in every coil embedded in a slot. For the rotating drive, all the coils are used and the same rotating magnetic field as an ordinary rotating motor is generated. For the linear drive, a partial rotating field is generated in the direction of movement in each region separated into two groups every half of toroidal core. For the armature winding, two types of methods are used which are a ring-winding supplied current at each slot and a double-layer-winding supplied current to each coil. The two-dimensional electromagnetic analysis in Cartesian coordinate system is shown for the analysis, in which an effect of circular shape is considered as an edge effect. The thrust and normal force characteristics at standstill were confirmed practically by using test machine. It was cleared that the surface motor had high transformation rate of about 79% for thrust in spite of the circular shape.
