Title:
A FAULT TOLERANT ELECTRICAL MACHINE
Document Type and Number:
WIPO Patent Application WO/2011/086019
Kind Code:
A3
Abstract:
A fault tolerant electrical machine (40) for use in a gas turbine engine comprising: a plurality of phases (50A-D); a detector (52A, 52B, 52C, 52D) arranged to detect a short-circuit fault in at least one of the phases (50A-D); and a controller (52A, 52B, 52C, 52D) arranged to intentionally cause a short-circuit fault in at least one other of the phases (50A-D) such that the vector sum of the second harmonic power vectors of the remaining phases is zero, in order to reduce or eliminate mechanical torque ripple.
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Inventors:
CULLEN JOHN (GB)
TRAINER DAVID (GB)
LONG STEPHEN (GB)
MOODIE ANGUS (GB)
TRAINER DAVID (GB)
LONG STEPHEN (GB)
MOODIE ANGUS (GB)
Application Number:
PCT/EP2011/050099
Publication Date:
November 24, 2011
Filing Date:
January 05, 2011
Export Citation:
Assignee:
ROLLS ROYCE PLC (GB)
CULLEN JOHN (GB)
TRAINER DAVID (GB)
LONG STEPHEN (GB)
MOODIE ANGUS (GB)
CULLEN JOHN (GB)
TRAINER DAVID (GB)
LONG STEPHEN (GB)
MOODIE ANGUS (GB)
International Classes:
H02H7/08; H02P25/22; H02P29/02
Domestic Patent References:
| WO2009007671A2 | 2009-01-15 |
Foreign References:
| US20090302792A1 | 2009-12-10 | |||
| US20050073273A1 | 2005-04-07 |
Attorney, Agent or Firm:
LITTLE, Thomas et al. (PO Box 31, Derby Derbyshire DE24 8BJ, GB)
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