SWITCHED RELUCTANCE MOTOR

PROBLEM TO BE SOLVED: To smoothly perform suction and separation by switching without braking rotation. SOLUTION: An air gap when magnetic suction is generated and a rotor and a stator begin to overlap each other is made smaller than an air gap when the rotor and the stator are separated. A ratio of magnetic flux density at a magnetizing force 5,000 A/m of a core material for use in the rotor, and magnetic flux density at a magnetizing force 5,000 A/m of an iron core material for use in the stator, is 0.90 to 1.10 times a ratio of the rotational directional width of a salient pole of the rotor and the rotational directional width of a comb tooth of the stator. More concretely, for example, the radial length of the front side end of the rotational directional width is maximized, and the radial length of the rear side end of the rotational directional width is minimized. As a result, the air gap is the smallest at the beginning of the overlapping of the salient pole and the comb tooth that requires a suction force, so that they strongly attract each other, and a residual magnetic field after they face each other wherein power supply is cut is abruptly attenuated due to the fact that the air gap is expanded. COPYRIGHT: (C)2008,JPO&INPIT