Dynamo electric machine.

摘要

A dynamo electric machine comprises a permanent magnet rotor (16) rotatable within a wound stator (14), characterized in that the rotor (16) comprises a ferromagnetic body (18) supporting n permanent magnets (17) equi-angularly spaced around the rotational axis of the ferromagnetic body (18), the wound stator (14) comprising an annular ferromagnetic body (19) having 1.5 n axially extending slots (21) defining radially inwardly extending poles (22) each pole (22) being encircled by a respective stator winding (24), the windings (24) encircling the first, fourth, seventh, ...... , n - 2<th> poles (22) being electrically interconnected in series and defining the first phase of the machine, the windings (24) of the second, fifth, eight, ...... , n - 1<th> poles (22) being electrically interconnected in series and defining the second phase of the machine, and the windings (24) of the third, sixth, ninth, ...... , n<th> poles (22) being electrically interconnected in series and defining the third phase of the machine. <IMAGE>