| 摘要 |
990,704. Electric motors having printed windings and planar air-gaps. SOC. D'ELECTRONIQUE ET D'AUTOMATISME. Sept. 6, 1962 [Sept. 8, 1961], No. 34188/62. Heading H2A. In a flat annular air-gap type of electric motor, which comprises a stator having a ring of permanent magnet fixed poles N, S on one side of an air gap in which rotates a printed circuit armature winding formed over the two faces of an insulating carrier member 7, the winding conductors include substantially radial portions 1 which are spaced apart by intervals 6 substantially equal to their width but of different magnetic property, and in order to eliminate drift or slow variations of speed at least one pair of permanent magnet poles is replaced by a pair of sets of magnetic teeth surrounded by coils 11 supplied with phase opposed alternating currents. The armature winding is supplied with D.C. via brushes. If the member 7 is magnetic the intervals 6 are left empty, but if non- magnetic they are filled with magnetic material; alternatively, the conductors may be magnetic in which case they are placed in depressions in a non-magnetic member. The magnetic teeth are formed in a yoke 10, and on the other side of the air gap is either a yoke 12 or a further similar stator. The A.C. energized teeth and magnetic intervals act as an elementary synchronous motor aiding or otherwise, the D.C. motor Specifications 874,394, 919,237, and 966,588 are referred to. |
