Hybrid magnet configuration to reduce the content of rare earth elements in a PM-synrel machine

R. M. Ram Kumar; Gaurang Vakil; David Gerada; Chris Gerada; Krzysztof Paciura; B. G. Fernandes; Liang Yan

doi:10.1109/ITEC48692.2020.9161621

Hybrid magnet configuration to reduce the content of rare earth elements in a PM-synrel machine

R. M. Ram Kumar
, Gaurang Vakil
, David Gerada
, Chris Gerada
, Krzysztof Paciura
, B. G. Fernandes
, Liang Yan

Nottingham Electrification Centre

Research output: Chapter in Book/Conference proceeding › Conference contribution › peer-review

3 Citations (Scopus)

Abstract

An electric drive with reduced content of rare earth magnets is sought after by the manufacturers of electric vehicles (EVs). A ferrite based permanent magnet assisted synchronous reluctance (PM-SynRel) machine has emerged as a viable alternative to curtail the dependence on NdFeB PM. However, inadequate torque density and demagnetization withstand capability of these machines prevent them from being used in EVs. This paper aims at identifying topologies of PM-SynRel machine which exhibits adequate torque density and demagnetization withstand capability with reduced rare earth content. Tandem arrangement of NdFeB and ferrite PMs in the flux barriers reduces rare earth content and improves demagnetization withstand capability without a significant change in output torque. Based on this, NdFeB-Ferrite-NdFeB (NFN) and FNN topologies of PM-SynRel machine are deduced as favourable choices for the EV sector. Finally, a multiphysics optimization is implemented to ascertain the performance of both NFN and FNN topologies.

Original language	English
Title of host publication	2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	352-357
Number of pages	6
ISBN (Electronic)	9781728146294
DOIs	https://doi.org/10.1109/ITEC48692.2020.9161621
Publication status	Published - Jun 2020
Event	2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020 - Chicago, United States Duration: 23 Jun 2020 → 26 Jun 2020

Publication series

Name	2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020

Conference

Conference	2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020
Country/Territory	United States
City	Chicago
Period	23/06/20 → 26/06/20

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Free Keywords

Demagnetization
Ferrite PM
Hybrid PM-SynRel
NdFeB

ASJC Scopus subject areas

Energy Engineering and Power Technology
Automotive Engineering
Transportation

Access to Document

10.1109/ITEC48692.2020.9161621

Cite this

Ram Kumar, R. M., Vakil, G., Gerada, D., Gerada, C., Paciura, K., Fernandes, B. G., & Yan, L. (2020). Hybrid magnet configuration to reduce the content of rare earth elements in a PM-synrel machine. In 2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020 (pp. 352-357). Article 9161621 (2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ITEC48692.2020.9161621

Ram Kumar, R. M. ; Vakil, Gaurang ; Gerada, David et al. / Hybrid magnet configuration to reduce the content of rare earth elements in a PM-synrel machine. 2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020. Institute of Electrical and Electronics Engineers Inc., 2020. pp. 352-357 (2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020).

@inproceedings{be7cc94ab6bc49bd8be10036e8bc904f,

title = "Hybrid magnet configuration to reduce the content of rare earth elements in a PM-synrel machine",

abstract = "An electric drive with reduced content of rare earth magnets is sought after by the manufacturers of electric vehicles (EVs). A ferrite based permanent magnet assisted synchronous reluctance (PM-SynRel) machine has emerged as a viable alternative to curtail the dependence on NdFeB PM. However, inadequate torque density and demagnetization withstand capability of these machines prevent them from being used in EVs. This paper aims at identifying topologies of PM-SynRel machine which exhibits adequate torque density and demagnetization withstand capability with reduced rare earth content. Tandem arrangement of NdFeB and ferrite PMs in the flux barriers reduces rare earth content and improves demagnetization withstand capability without a significant change in output torque. Based on this, NdFeB-Ferrite-NdFeB (NFN) and FNN topologies of PM-SynRel machine are deduced as favourable choices for the EV sector. Finally, a multiphysics optimization is implemented to ascertain the performance of both NFN and FNN topologies.",

keywords = "Demagnetization, Ferrite PM, Hybrid PM-SynRel, NdFeB",

author = "\{Ram Kumar\}, \{R. M.\} and Gaurang Vakil and David Gerada and Chris Gerada and Krzysztof Paciura and Fernandes, \{B. G.\} and Liang Yan",

note = "Publisher Copyright: {\textcopyright} 2020 IEEE.; 2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020 ; Conference date: 23-06-2020 Through 26-06-2020",

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Ram Kumar, RM, Vakil, G, Gerada, D, Gerada, C, Paciura, K, Fernandes, BG & Yan, L 2020, Hybrid magnet configuration to reduce the content of rare earth elements in a PM-synrel machine. in 2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020., 9161621, 2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020, Institute of Electrical and Electronics Engineers Inc., pp. 352-357, 2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020, Chicago, United States, 23/06/20. https://doi.org/10.1109/ITEC48692.2020.9161621

Hybrid magnet configuration to reduce the content of rare earth elements in a PM-synrel machine. / Ram Kumar, R. M.; Vakil, Gaurang; Gerada, David et al.
2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020. Institute of Electrical and Electronics Engineers Inc., 2020. p. 352-357 9161621 (2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020).

Research output: Chapter in Book/Conference proceeding › Conference contribution › peer-review

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AU - Ram Kumar, R. M.

AU - Vakil, Gaurang

AU - Gerada, David

AU - Gerada, Chris

AU - Paciura, Krzysztof

AU - Fernandes, B. G.

AU - Yan, Liang

PY - 2020/6

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N2 - An electric drive with reduced content of rare earth magnets is sought after by the manufacturers of electric vehicles (EVs). A ferrite based permanent magnet assisted synchronous reluctance (PM-SynRel) machine has emerged as a viable alternative to curtail the dependence on NdFeB PM. However, inadequate torque density and demagnetization withstand capability of these machines prevent them from being used in EVs. This paper aims at identifying topologies of PM-SynRel machine which exhibits adequate torque density and demagnetization withstand capability with reduced rare earth content. Tandem arrangement of NdFeB and ferrite PMs in the flux barriers reduces rare earth content and improves demagnetization withstand capability without a significant change in output torque. Based on this, NdFeB-Ferrite-NdFeB (NFN) and FNN topologies of PM-SynRel machine are deduced as favourable choices for the EV sector. Finally, a multiphysics optimization is implemented to ascertain the performance of both NFN and FNN topologies.

AB - An electric drive with reduced content of rare earth magnets is sought after by the manufacturers of electric vehicles (EVs). A ferrite based permanent magnet assisted synchronous reluctance (PM-SynRel) machine has emerged as a viable alternative to curtail the dependence on NdFeB PM. However, inadequate torque density and demagnetization withstand capability of these machines prevent them from being used in EVs. This paper aims at identifying topologies of PM-SynRel machine which exhibits adequate torque density and demagnetization withstand capability with reduced rare earth content. Tandem arrangement of NdFeB and ferrite PMs in the flux barriers reduces rare earth content and improves demagnetization withstand capability without a significant change in output torque. Based on this, NdFeB-Ferrite-NdFeB (NFN) and FNN topologies of PM-SynRel machine are deduced as favourable choices for the EV sector. Finally, a multiphysics optimization is implemented to ascertain the performance of both NFN and FNN topologies.

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ER -

Ram Kumar RM, Vakil G, Gerada D, Gerada C, Paciura K, Fernandes BG et al. Hybrid magnet configuration to reduce the content of rare earth elements in a PM-synrel machine. In 2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020. Institute of Electrical and Electronics Engineers Inc. 2020. p. 352-357. 9161621. (2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020). doi: 10.1109/ITEC48692.2020.9161621

Hybrid magnet configuration to reduce the content of rare earth elements in a PM-synrel machine

Abstract

Publication series

Conference

UN SDGs

Free Keywords

ASJC Scopus subject areas

Access to Document

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