PURPOSE: To reduce the deformation amount at the edge of a coil, by arranging a cylindrical coil step on the inside circumference of coil and by separating an annular ring radially which is arranged on the inside circumference of this coil step.
CONSTITUTION: A rotor core 2 arranged around a rotating shaft 1 is secured with core caps 8 and 9. The rotor core 2 is then coupled to the inside circumference of the under surface of a cylindrical coil step 4 by shrinkage fitting on the outside circumference of the quartered segment of a core cap 9. The inside circumference of the core cap 9 is brought into contact with the outside circumference of the core cap 8 and is coupled each other with axially anchoring projection and recession. On the outside circumference of this coil step 4 a rotor coil 3 is arranged along with insulations 5, 7 and 12 and secured with a binding wire or a cylindrical coil supporting member 6 so as to give compressive displacement to the edge of the coil. The deformation amount at the edge of coil will thereby be reduced.
FURUKAWA YOSHIO
TOSHIMA HISASHI
NIWA SADAHIKO
YASAKA YASUHIRO
NAGURA OSAMU
