hub half 24 the hub halves 22 and 24 are connected to one another and to the shaft so as to rotate therewith as by a roll pin 26 passing through the two hub halves and the shaft 10 suitably secured between the two hub halves 22 and 24 to rotate therewith is a disc shaped rotor 28 made of a nonconducting non magnetic material such as for example a phenolic secured to the rotor 28 as by adhesive or the like are a plurality of conducting wires forming armature coils 30 which will be more fully discussed below fixedly connected to the machine housing 8 are first and second spaced stator members indicated at 30 and 32 each of the stator members 30 and 32 includes a plurality of flat pie segmented permanent magnets indicated at 34 which may for example be constructed of ceramic ferrite each of the permanent magnets 34 is magnetized through thickness so one face is of one polarity and the other face of opposite polarity the magnets may be fixedly secured to a metal backing plate in the form of a ring made as of soft iron or steel the two back up rings being indicated at.