COMMUTATORLESS DC MOTOR Russian patent published in 1997 - IPC

FIELD: power electric drives and various automatic control systems. SUBSTANCE: motor has stator 1 whose teeth carry m-phase winding 3 and multi-pole rotor using permanent magnets 6. One coil is wound on every tooth 2 of stator. Phases are spaced at 120 deg. Every phase has two equal coil groups. Every group includes three adjacent teeth which carry windings of one phase. Direction of winding inside coil groups alternates. Direction of winding on teeth is the same, but it is shifted through 180 deg. EFFECT: enhanced efficiency of motor operation. 3 dwg