Fault-tolerant permanent magnet machine with reconfigurable...

Details Fault-tolerant permanent magnet machine with reconfigurable... Fault-tolerant permanent magnet machine with reconfigurable...

2007-03-28

2009-06-02

Zarroli, Michael C (Department: 2839)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S254100

Reexamination Certificate

active

07541705

ABSTRACT:
A permanent magnet (PM) machine has a fault condition mechanism disposed within a back iron of the stator portion, the mechanism operational to automatically reduce fault currents associated with the PM machine during a fault condition. The fault condition mechanism disposed within the stator back iron is reconfigurable to automatically reduce internal heat associated with the PM machine during a fault condition. A method of reconfiguring the PM machine upon detecting a fault condition includes the steps of 1) selecting the reconfigurable fault condition mechanism from a) a plurality of magnetically anisotropic rotatable cylinders, b) a plurality of ferrofluid-filled cavities, and c) a dual-phase material selectively embedded within the stator core; and 2) reconfiguring the fault condition mechanism to automatically reduce fault currents or internal heat associated with the PM machine upon detection of a fault condition.

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Favorable Slot and Pole Number Combinations for Fault-Tolerant PM Machines, A. Mitcham, G. Antonopoulos, J. Cullen, IEE Proceedings (vol. 151, No. 5, Sep. 30, 2003, Revised Apr. 2, 2004).

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