System for a generator set
AssigneeCummins Power Generation Inc.
InventorsDexiu Zhao, Yongxing Lu, Dongsheng Yan
Life of this patent
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Abstract
Systems and apparatuses include an asynchronous electrical machine coupled to an engine, a power supply selectively coupled to the electrical machine by a power supply switch device, and an electrical output coupled to the electrical machine by an output switch device. The electrical machine is structured to produce electricity when the power supply switch device is open, the output switch device is closed, and the electrical machine is mechanically driven by the engine, or perform as a starter motor to start the engine when the power supply switch device is closed, the output switch device is open, and the electrical machine mechanically drives the engine.
Claims20
A system for a generator set comprising:
- an asynchronous electrical machine coupled to an engine;
- an excitation capacitor selectively coupled to the asynchronous electrical machine by a capacitor switch device;
- a power supply selectively coupled to the electrical machine by a power supply switch device;
- and
- an electrical output coupled to the electrical machine by an output switch device,
- wherein the electrical machine is structured to:
- perform as a starter motor to start the engine when the capacitor switch device is open, the power supply switch device is closed, the output switch device is open, and the electrical machine mechanically drives the engine.
A method of operating a system of generator set including an asynchronous induced low voltage electrical machine coupled to an engine, an excitation capacitor selectively coupled to the electrical machine by a capacitor switch device, a power supply selectively coupled to the electrical machine by a power supply switch device and controlled by a variable frequency drive, and an electrical output coupled to the electrical machine by an output switch device,
- the method comprising:
- producing electricity with the electrical machine by
- closing the capacitor switch device,
- opening the power supply switch device,
- closing the output switch device, and
- mechanically driving the electrical machine with the engine;
- and
- providing mechanical energy to the engine from the electrical machine to start the engine by
- opening the capacitor switch device,
- closing the power supply switch device,
- opening the output switch device, and
- mechanically driving the engine with the electrical machine.
Dependencies are inferred from the claim text.