| 摘要 |
PURPOSE:To improve efficiency and to make a motor compact, by a method wherein a multi-pole magnetizing magnet for a frequency generator is installed between armature coils, and a conductive pattern for forming the frequency generator of comb shape is formed to stationary side opposite to the magnet. CONSTITUTION:A bearing house 3 is fixed at center portion of a stator yoke 2, and a rotary shaft is supported by bearings 4-l, 4-2. An annular field magnet 7 is fixed to a lower surface of the stator yoke 2. On outer circumference of the field magnet 7 is arranged a print circuit board 9 with inner surface formed an FG pattern 8 for forming a frequency generator of comb shape. A rotor yoke 14 is integrated with the rotary shaft 5 by a screw 15 and rotated. When armature coils 15-l ... are molded by plastics into disk shape, a plastic magnet 19 is formed integrally. A multi-pole magnetizing magnet 20 for forming the frequecny generator is formed to the plastic magnet 19.
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