| 摘要 |
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.
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