Patent ID: 8710708
Filing Date: 2014-04-29
Classification: F01D,F02C,F05D,H02K

Abstract:
1. A tandem arrangement for an electric machine comprising: an outside rotor having two axially spaced-apart sets of circumferentially-disposed permanent magnets; an inside stator having at least two electrically-independent windings, the at least two windings axially spaced apart from one another and disposed relative to the magnet sets to thereby be magnetically coupled to a respective one of the sets of permanent magnets during rotation of the rotor; wherein the rotor is provided in two separate pieces, each piece being supported from opposite axial sides of the electric machine relative to one another and both of the rotor pieces being supported by and in a torque-transmitting engagement with a common shaft; and wherein the stator is supported from substantially centrally of the two rotor pieces.