Gm Global Technolgoy Operations, Inc.

Muhammad A Zahid

Khorshed Mohammed Alam

Mazharul Chowdhury

Thomas W Nehl

Dumitru Puiu

Yilun Luo

Peng Peng

An electric machine with reconfigurable rotor poles. The machine may include a stator including a plurality of stator windings configured for generating a rotating magnetic field (RMF) and a rotor configured for rotating within the stator according to a torque induced by the RMF. The rotor may include a plurality of rotor windings wrapped around a plurality of circumferentially spaced rotor protrusions. The electric machine may include a rotor power transfer circuit operable for reconfiguring electrical excitation of the rotor windings according to a plurality of excitation modes.

Electric machine with reconfigurable rotor poles

A power transfer system for a separately excited machine includes a positive slipring and a negative slipring. One or more positive brushes and one or more negative brushes. A rotor winding attached to rotor laminations and a stator winding attached to stator laminations, such that the stator winding is outside of the rotor winding. The power transfer system may have a hollow shaft. The power transfer system may also have the negative brush and the negative slipring being exterior to the hollow shaft, and one or more position sensors. A shaft ingress separator may be within the hollow shaft and may act as a barrier between wet areas and dry areas. The power transfer system may also include a positive wire and a negative wire, which may be reversed.

Shaft embedded brush power transfer for separately excited machine power

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Troy, MI, United States of America

Muhammad A Zahid