| 摘要 |
PURPOSE:To improve the efficiency of a coreless motor by providing a hollow core disc-shaped coil rotatable with respect to a yoke along the outer periphery of the disc-shaped yoke and field magnets for supplying magnetic fluxes axially oppositely directed to the planes opposite to the center to each other. CONSTITUTION:Field magnets 3a, 3b, 4a, 4b magnetized vertically with respect to the plane and formed in a sector shape having an angle of approx. 108 deg. are secured to the inner surfaces of a case 1 and a cover case 2 respectively. Yoke members 5, 6 are superposed, disks 5a, 6a are contacted, and cylindrical parts 5b, 6b are engaged to form yokes. A coil 10 is so formed as to retain a predetermined interval with the outer surface along the outer surfaces of the cylindrical parts 5a, 6a. A central hole 10a is so formed at the center of the lower surface of the coil 10 so as not to contact with the outer periphery of the cylindrical part 6b, and a rectifier 12 secured to the rotor shaft 9 is secured to the center of the upper surface of the coil 10. |
