Claw pole brushless synchronous machine
AssigneeHamilton Sundstrand Corporation
InventorJacek F. Gieras
Life of this patent
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Abstract
A claw pole synchronous machine includes a housing and a rotor being rotatable relative to the housing and having a plurality of first claw poles circumferentially alternating with a plurality of second claw poles. The plurality of first claw poles are axially overlapping with the plurality of second claw poles. At least two DC excitation coils are fixed relative to the housing and configured to provide a magnetic field to the rotor. A stator is fixed to the housing.
Claims19
A claw pole synchronous machine comprising:
- a housing;
- a rotor being rotatable relative to the housing and having a plurality of first claw poles circumferentially alternating with a plurality of second claw poles, the plurality of first claw poles being axially overlapping with the plurality of second claw poles;
- at least two DC excitation coils fixed relative to said housing and configured to provide a magnetic field to the rotor;
- and
- a stator fixed to the housing being in operable communication with the rotor.
A claw pole synchronous machine comprising:
- a housing defining a first magnetic flux path through a first ferromagnetic disk and interfaced with a first DC excitation coil, and defining a second magnetic flux path through a second ferromagnetic disk and interfaced with a second DC excitation coil;
- a rotor being rotatable relative to the housing and having a first plurality of claw poles circumferentially alternating with a second plurality of claw poles, the plurality of first claw poles being axially overlapping with the second plurality of claw poles, wherein the rotor comprises a first ferromagnetic disk, the first plurality of claw poles extending axially from a radially outer edge of the first ferromagnetic disk, and a second ferromagnetic disk, coaxial with the first ferromagnetic disk, the second plurality of claw poles extending from a radially outer edge of the second ferromagnetic disk;
- at least two DC excitation coils fixed relative to said housing and configured to provide a magnetic field to the rotor;
- and
- a stator fixed to the housing being in operable communication with the rotor.
A method for generating electricity in a synchronous machine comprising:
- generating a first DC excitation field using a first DC excitation coil, the first DC excitation coil being stationary relative to a housing;
- generating a second DC excitation field using a second DC excitation coil, the second DC excitation field opposing the first DC excitation field, and the second DC excitation coil being stationary relative to the housing;
- and
- interfacing a claw pole rotor assembly with the first and second DC excitation fields using a first end bell and a second end bell of a synchronous machine to direct the first and second DC excitation fields to a corresponding rotor disk of the claw pole rotor assembly.
Dependencies are inferred from the claim text.