Starter/generator system
AssigneeUnison Industries, LLC
InventorsBalamurugan Sridharan, David Raju Yamarthi, Parmeet Singh Chhabra, Brian Christopher Kemp, Shiloh Montegomery Meyers
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Abstract
A starter/generator system that includes a first and second electric machine. The first electric machine has a first rotor and a first stator where the first rotor is adapted to receive kinetic energy and the first stator includes a first set of windings. The second electric machine has a second rotor rotatable and a second stator. The second stator is fixed relative to the first stator and the second stator includes a second set of windings.
Claims20
A method of operating a starter/generator (S/G) system for an engine, the method comprising:
- operating the S/G system as a starter in a first starting mode by kinetically driving a first rotor configured to be driven by pressurized air received at an inlet to generate current in a first set of windings in a first stator, supplying the generated current from the first set of windings to a second set of windings in a second stator to induce rotation of a second rotor that rotates a S/G system kinetic input/output to start the engine, wherein the first rotor and the second rotor are independently rotatable;
- and
- operating the S/G system as a generator in a second generating mode by kinetically driving the S/G kinetic input/output to rotate the second rotor to generate current in the second set of windings that is supplied to a S/G power output;
- wherein the inlet of the S/G system is different from an air inlet of the engine, and wherein the S/G system is configured to operably switch from the first starting mode to the second generating mode.
A starter/generator (S/G) system for an engine, the S/G system comprising:
- a first electric machine having a first rotor rotatably coupled to a drive shaft and rotatable relative to a first stator, the first stator having a first set of windings, wherein when the S/G system is in a first starting mode, pressurized air from a pressurized air source supplied at an inlet of the S/G system rotates the first rotor to generate current in the first set of windings in the first stator;
- a second electric machine having a second rotor rotatable relative to a second stator, the second stator fixed relative to the first stator, the second stator having a second set of windings;
- a S/G housing, wherein the S/G housing includes the first electric machine and the second electric machine;
- an S/G kinetic input/output rotationally coupled with the second rotor, wherein the S/G kinetic input/output shaft is adapted to supply a kinetic output to the engine, by way of a gear box mounted to the engine, in the first starting mode or receive a kinetic input from the engine in a second generating mode, wherein the drive shaft and the S/G kinetic input/output independently rotate;
- and
- an S/G power output electrically connected with the second set of windings.
A starter/generator (S/G) system for an engine, the S/G system comprising:
- a first electric machine having a first rotor rotatable relative to a first stator, the first rotor rotatably coupled to a drive shaft and the first stator having a first set of windings;
- a second electric machine having a second rotor rotatable relative to a second stator and independently rotatable relative to the first stator, the second stator fixed relative to the first stator, the second stator having a second set of windings;
- a S/G housing, wherein the S/G housing includes the first electric machine and the second electric machine, and wherein the S/G housing is apart from the engine;
- an S/G kinetic input/output rotationally coupled with the second rotor, wherein the S/G kinetic input/output is adapted to supply a kinetic output to the engine when the S/G system is operable as a starter, or receive a kinetic input from the engine when the S/G system is operable as a generator;
- and
- an S/G power output electrically connected with the second set of windings;
- wherein both the first rotor and the second rotor are apart from an engine rotor.
Dependencies are inferred from the claim text.