| 摘要 |
PURPOSE:To eliminate a difficult magnetizing work and to reduce the inertia of a rotor by forming the rotor in a disc shape of a soft magnetic material. CONSTITUTION:A rotor 6 is formed in a disc shape made of a soft iron as a soft magnetic material, and a plurality of slits 7 are formed long in the radial direction and at an equal interval in the circumferential direction. Since the rotor 6 is formed of a soft iron as a soft magnetic material, the inertia of the rotor 6 may be reduced by applying a principle that a magnetic material is attracted to an air gap magnetic field, even if a particular magnetizing process is not executed, and the accelerating/decelerating speed of the rotor 6 can be rapidly performed. |
