Provided is a circular pole piece that contributes to simplification of
work and a reduction in costs and that has no gap created among adjoining blocks.
A circular pole piece is manufactured by circularly arranging laminate blocks each
having numerous hexagonal directional magnetic steel sheet tiles layered. Since
heteromorphic soft magnetic material tiles are unnecessary, work can be simplified
and the cost of the circular pole piece can be reduced. Moreover, the laminate
blocks can be arranged substantially circularly without a gap among adjoining blocks.