Title:
ELECTRICAL MACHINE
Document Type and Number:
WIPO Patent Application WO2005011078
Kind Code:
A8
Abstract:
In order to be acceptable for safety critical applications, it is necessary for an electrical machine to allow continued operation despite an electrical short circuit in one of the operational phases of that electrical machine. It will be appreciated that an electrical short circuit creates excessive electrical current through the short circuit with significant heating and other detrimental effects. However, the electrical machine can operate with one operational phase disabled. In such circumstances, the present invention incorporates means for determining an electrical short circuit has occurred and then injects an electrical current approximately equal to or greater than the rated electrical current. In such circumstances, the operational phase or coil (4, 24, 34) ils effectively protected despite the electrical short circuit and hence the electrical machine can continue to operate.
Inventors:
CULLEN JOHN JAMES ANTHONY (GB)
ANTONOPOULOS GEORGE (GB)
ANTONOPOULOS GEORGE (GB)
Application Number:
PCT/GB2004/002601
Publication Date:
March 24, 2005
Filing Date:
June 18, 2004
Export Citation:
Assignee:
ROLLS ROYCE PLC (GB)
CULLEN JOHN JAMES ANTHONY (GB)
ANTONOPOULOS GEORGE (GB)
CULLEN JOHN JAMES ANTHONY (GB)
ANTONOPOULOS GEORGE (GB)
International Classes:
H02K11/00; H02P29/02; (IPC1-7): H02H7/122; H02H7/085; H02P7/00
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