Abstract 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.
AN AXIAL AIRGAP ELECTRIC ROTARY MACHINE COMPRISING THE COMBINATION OF A DISC-TYPE ARMATURE, AND A FIELD POLE RING MOUNTED CONCENTRIC WITH SAID ARMATURE AND ON ONE SIDE THEREOF, SAID ARMATURE CARRYING AN ANNULAR WINDING FORMED OF TWO SETS OF THIN AND FLAT CONDUCTORS CARRIED ON OPPOSITE FACES OF SAID ARMATURE, THE WINDING CONDUCTORS ON THE SIDE OF THE ARMATURE FACING SAID POLE RING HAVING STRAIGHT PORTIONS ARRANGED RADIALLY OF SAID ARMATURE AND BEING SPACED APART BY INTERVALS SUBSTANTIALLY EQUAL TO THEIR WIDTH, SAID CONDUCTOR PORTIONS AND INTERVALS DEFINING ALTERNATE SUBSTANTIALLY RADIALLY EXTENDING AREAS OF DISTINCT MAGNETIC PROPERTIES, SAID POLE RING HAVING AT LEAST A PAIR OF ADJACENT SECTORS THEREOF MAGNETIZED IN OPPOSITE POLARITIES BY PERMANENT MAGNET MEANS, AND AT LEAST ONE PAIR OF MAGNETIC POLE MEMBERS EMBODIED IN ADJACENT SECTORS OF SAID RING AND HAVING THEIR POLE FACES SLOTTED TO PRESENT SPACED RADIALLY EXTENDING TEETH FACING SAID ARMATURE, AND A MAGNETIZING COIL SURROUNDING EACH SLOTTED POLE MEMBER, SAID COILS BEING CONNECTED TO A SOURCE OF ALTERNATING CURRENT FOR MAGNETIZATION IN OPPOSITE POLARITIES.
Claim 2
Dependent Claim
172 words
AN AXIAL AIRGAP ELECTRIC ROTARY MACHINE COMPRISING THE COMBINATION OF A DISC-TYPE ARMATURE, AND A FIELD POLE RING MOUNTED CONCENTRIC WITH SAID ARMATURE AND ON ONE SIDE THEREOF, SAID ARMATURE CARRYING AN ANNULAR WINDING FORMED OF TWO SETS OF THIN AND FLAT CONDUCTORS CARRIED ON OPPOSITE FACES OF SAID ARMATURE, THE WINDING CONDUCTORS ON THE SIDE OF THE ARMATURE FACING SAID POLE RING HAVING STRAIGHT PORTIONS ARRANGED RADIALLY OF SAID ARMATURE AND BEING SPACED APART BY INTERVALS SUBSTANTIALLY EQUAL TO THEIR WIDTH, SAID CONDUCTOR PORTIONS AND INTERVALS DEFINING ALTERNATE SUBSTANTIALLY RADIALLY EXTENDING AREAS OF DISTINCT MAGNETIC PROPERTIES, SAID POLE RING HAVING AT LEAST A PAIR OF ADJACENT SECTORS THEREOF MAGNETIZED IN OPPOSITE POLARITIES BY PERMANENT MAGNET MEANS, AND AT LEAST ONE PAIR OF MAGNETIC POLE MEMBERS EMBODIED IN ADJACENT SECTORS OF SAID RING AND HAVING THEIR POLE FACES SLOTTED TO PRESENT SPACED RADIALLY EXTENDING TEETH FACING SAID ARMATURE, AND A MAGNETIZING COIL SURROUNDING EACH SLOTTED POLE MEMBER, SAID COILS BEING CONNECTED TO A SOURCE OF ALTERNATING CURRENT FOR MAGNETIZATION IN OPPOSITE POLARITIES.