Modeling and analysis of eddy current losses in permanent magnet machines with multi-stranded bundle conductors

Arumugam, Puvan; Dusek, J.T.; Mezani, Smaïl; Hamiti, Tahar; Gerada, Chris

doi:10.1016/j.matcom.2015.10.010

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…Also it can be seen that as expected the AC resistances increase in both cases of winding arrangements as frequency increases. This is due to the changes in the current distribution in the winding because of the effect of both proximity effect and skin effect [17]. However, the optimized conductor's placement reduces the AC resistances at higher frequencies.…”

Section: B Winding Resistancesmentioning

confidence: 99%

Design Optimization on Conductor Placement in the Slot of Permanent Magnet Machines to Restrict Turn–Turn Short-Circuit Fault Current

Arumugam

2016

IEEE Trans. Magn.

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Arumugam, Puvaneswaran (2016) Design optimization on conductor placement in the slot of permanent magnet machines to restrict turn-turn short-circuit fault current. IEEE Transactions on Magnetics, 52 (5). ISSN 0018-9464Access from the University of Nottingham repository: http://eprints.nottingham.ac.uk/36116/1/Design%20Optimization%20on%20Conductor %20Placement%20in%20the%20Slot%20of%20Permanent%20Magnet%20Machines%20to %20Restrict%20Turn-turn.pdf Copyright and reuse:The Nottingham ePrints service makes this work by researchers of the University of Nottingham available open access under the following conditions. This article is made available under the University of Nottingham End User licence and may be reused according to the conditions of the licence. For more details see: http://eprints.nottingham.ac.uk/end_user_agreement.pdf A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. In Permanent Magnet (PM) machines, a turn-turn Short-Circuit (SC) fault is the most critical fault to eradicate. The fault introduces high SC current in the shorted turn which may consequently lead to secondary faults unless the fault is appropriately controlled. This paper proposes feasible conductors' placement in a slot of PM machine to minimize such turn-turn fault current. In order to minimize the fault current, the conductor arrangement in a slot is optimized using multi-objective Genetic Algorithm (GA) incorporating with both analytical and Finite Element (FE) numerical tool. The possible combinations of conductors' placement are set as variables and optimized for a given machine which is designed for safety critical applications. It is shown that the fault current associated to a single turn fault can be significant for the random winding placement even though the remedial strategies are put in place. It is also shown that the fault current can be limited significantly by rearranging the winding placement in a way to share slotleakage fluxes. This is confirmed via experiment on E-core. Influences of the winding arrangement on both frequency dependent resistances and windings capacitances are experimented. It is demonstrated that adopting the winding arrangement that shares the slot-leakage flux effectively benefits to minimize the AC losses in addition to improved fault tolerance. But it increases the turn-turn capacitances whose effect however can be neglected as the resonance frequency occurs beyond the operational frequency range of the machines of interest.

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Section: B Winding Resistancesmentioning

confidence: 99%