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

2009-10-20

Zarroli, Michael C (Department: 2839)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S216006

Reexamination Certificate

active

07605504

ABSTRACT:
A permanent magnet (PM) machine has a reconfigurable fault condition mechanism disposed solely within a stator core portion, wherein the mechanism is automatically reconfigurable to reduce fault currents associated with the PM machine during a fault condition. The reconfigurable fault condition mechanism is automatically reconfigurable to also reduce internal heat associated with the PM machine during a fault condition. A method of reconfiguring the fault condition mechanism upon detection of a fault condition includes the steps of 1) selecting the reconfigurable fault condition mechanism from a) a plurality of rotatable magnetically anisotropic cylinders disposed within stator core slots, b) a plurality of ferrofluid-fillable cavities associated with stator core slots, and c) a sliding shield within the stator core; and 2) reconfiguring the fault condition mechanism to automatically reduce fault currents 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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