Simultaneous multiple voltage level bridge-type inverter/converter unit for an electronically commutated electrical machine
AssigneeGeneral Electric Company
InventorsWilliam D. Jones, Arthur V. Radun
Life of this patent
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Abstract
A modified inverter/converter unit electronically commutates a switched reluctance machine to provide multiple voltage levels for engine and aircraft applications. A set of power switching transistors apply an exciting current to windings in the switched reluctance machine to produce power at a first voltage level. Additional voltage levels may be provided by using the turns ratio from a plurality of transformers and the switching frequency from the power switching transistors. Alternatively, additional voltage levels may be provided by using windings of a plurality of transformers internal to the switched reluctance machine.
Claims10
A method for providing multiple voltage levels comprising the steps of:
- providing an inverter/converter unit to electronically commutate a switched reluctance machine;
- providing a first transformer having a turns ratio and a second transformer having a turns ratio;
- accessing an alternating voltage at points between secondary windings of the first and second transformers and diodes to permit operation of alternating current loads;
- using at least one power switching transistor having a switching frequency to apply an exciting current to windings in the switched reluctance machine to produce power at a first voltage level;
- using the turns ratio from the first and second transformers and the switching frequency from the at least one power switching transistor to provide at least one additional voltage level.
A method for providing multiple voltage levels comprising the steps of:
- providing an inverter/converter unit to electronically commutate a switched reluctance machine, the switched reluctance machine including at least one transformer having windings;
- using at least one power switching transistor having a switching frequency to apply an exciting current to windings in the switched reluctance machine to produce power at a first voltage level;
- using the windings inside the switched reluctance machine to provide at least one additional voltage level.
Dependencies are inferred from the claim text.