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US 2011/0254284 A1Published application
Electrical generation
AssigneeROLLS-ROYCE plc
InventorsMaurizio CATUCCI, David R. TRAINER
Life of this patent
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Abstract
Synchronous generators are driven by shafts to produce 3-phase AC power. The frequency and amplitude of power depends on the speed of the respective shaft. The outputs are rectified and connected in series to provide an output of varying voltage DC power to a load. Applications in aerospace and renewable energy supply are described.
Claims21
An electrical generation arrangement comprising:
- a plurality of synchronous generators;
- a plurality of drive arrangements, each operable to drive a respective generator;
- a plurality of rectifiers associated with respective generators to rectify the output of the respective generator;
- the rectifiers being connected in series to provide the output voltage of the arrangement.
1 more element
A gas turbine engine comprising:
- a plurality of turbines, a plurality of compressors, a plurality of shafts and an electrical generation arrangement,
- each shaft connecting a turbine to a corresponding compressor,
- the electrical generation arrangement comprising a plurality of generators, a plurality of rectifiers and a conditioning circuit,
- each generator being driven by a respective shaft of the gas turbine engine,
- each rectifier is associated with a respective generator to rectify the output of the respective generator,
- the rectifiers being connected in series to provide an output voltage of the electrical generation arrangement, the conditioning circuit is operable to condition the output voltage of the electrical generation arrangement and the conditioning circuit is arranged to provide a controlled DC output voltage of the electrical generation arrangement.
3 more elements
A gas turbine engine comprising:
- a plurality of turbines, a plurality of compressors, a plurality of shafts and an electrical generation arrangement,
- each shaft connecting a turbine to a corresponding compressor,
- the electrical generation arrangement comprising a plurality of generators, a plurality of rectifiers and a conditioning circuit,
- each generator being driven by a respective shaft of the gas turbine engine, each generator comprises a permanent magnet generator,
- each rectifier is associated with a respective generator to rectify the output of the respective generator, each rectifier comprises a passive diode circuit,
- the rectifiers being connected in series to provide an output voltage of the electrical generation arrangement, the conditioning circuit is operable to condition the output voltage of the electrical generation arrangement, the conditioning circuit is arranged to provide a controlled DC output voltage of the electrical generation arrangement,
- the conditioning circuit comprises an inductance, a switch and a monitor circuit, the inductance is arranged in series with the output voltage, the switch is arranged to selectively short the inductance and the control circuit is arranged to monitor the output voltage and to control the switch.
4 more elements
Dependencies are inferred from the claim text.