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US 5,726,560 AGranted
Switched reluctance generator
AssigneeBarber-Colman Company
InventorsKenneth J. Eakman, Mike Andres, Lance Miller, Nicholas F. Campagna
Life of this patent
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Abstract
A switched reluctance generator that can be used in an air cycle machine, where the generator uses the energy from the shaft of the air cycle machine to provide a back-up power supply to the magnetic bearings supporting the shaft. The generator includes circuitry for comparing the non-commutated excitation current with a command signal to regulate the excitation current, thereby regulating the generator output voltage.
Claims17
A magnetic bearing system and turbine with a dual power supply, comprising:
- a shaft, rotatable about a central axis;
- a turbine mounted on the shaft having an inlet means for receiving pressurized gas, said turbine and shaft being driven into rotation by the gas;
- a magnetic bearing for supporting the shaft;
- a source of electrical current connected to energize the bearing in normal operation;
- and
- a generator for supplying electrical current to the magnetic bearing as an alternative power supply to the source of electrical current, the generator comprising a rotor disposed on the same shaft and a stator disposed circumferentially about the rotor.
3 more elements
Dependencies are inferred from the claim text.