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US 11,894,742 B2Granted
Electric machine systems comprising a stator common to the plurality of rotors
AssigneePratt & Whitney Canada Corp.
InventorsEric Latulipe, Richard Freer
Life of this patent
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Abstract
An electric machine system described herein comprises a first and second electric machines configured to drive a load. The first electric machine has a plurality of first rotors driven using electric power having a first phase. The second electric machine has a plurality of second rotors driven using electric power having a second phase. The second phase differs from the first phase. Each of one or more shafts connects a first rotor with a second rotor. The first rotor is coaxial with and axially spaced apart from the second rotor.
Claims10
An electric machine system comprising:
- a first electric machine configured to drive a load drivingly coupled to a first shaft rotatable about an axis, the first electric machine having a plurality of magnetized bi-pole first rotors and a first stator common to the plurality of first rotors, the first stator including a first winding receiving electric power having a first phase, the first rotors being angularly spaced apart around the axis;
- a second electric machine configured to drive the load, the second electric machine having a plurality of magnetized bi-pole second rotors and a second stator common to the plurality of second rotors, the second stator including a second winding receiving electric power having a second phase different from the first phase to provide a torque phase offset between the first electric machine and the second electric machine, the second rotors being angularly spaced apart around the axis;
- and
- two or more second shafts, each second shaft connecting one of the first rotors with one of the second rotors, the first rotors being coaxial with and axially spaced apart from respective ones of the second rotors.
1 more element
Dependencies are inferred from the claim text.