Patent ID: 7388311

Claim:
An electric machine that provides winding redundancy via magnetically isolated phases and limits short circuit current in any of said phases, the machine comprising: a stator that defines a plurality of teeth; permanent magnets; a rotor that carries said magnets and is arranged for rotation relative to said stator; and conductors arranged as windings that define coils about said teeth wherein said windings are configured to define said phases which each include respective ones of said coils and which can be considered in phase pairs wherein the coils of said phases are interleaved so that: a) each of said phases includes at least one pair of said coils that are wrapped in opposite directions about adjacent ones of said teeth; b) each of said phase pairs include a coil from one of said phase pair and a coil from the other of said phase pair that are wrapped in opposite directions about adjacent ones of said teeth; and c) each of said phase pairs include a coil from one of said phase pair and a coil from the other of said phase pair that are wrapped in the same direction about adjacent ones of said teeth.