General sizing of permanent magnet motors

This thesis presents the development of an open-source optimisation framework for the prelim- inary design and comparative analysis of high-performance permanent magnet synchronous motors (PMSMs). The proposed methodology combines multi-objective evolutionary optimi- sation with finite element elect...

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Bibliographic Details
Author: Serracanta Pujol, Biel
Format: master thesis
Publication Date:2026
Country:España
Institution:Universitat Politècnica de Catalunya (UPC)
Repository:UPCommons. Portal del coneixement obert de la UPC
Language:English
OAI Identifier:oai:upcommons.upc.edu:2117/456716
Online Access:https://hdl.handle.net/2117/456716
Access Level:Open access
Keyword:Electric machines
Electric motors
Electric driving
Màquines elèctriques
Motors elèctrics
Accionament elèctric
Àrees temàtiques de la UPC::Enginyeria elèctrica
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spelling General sizing of permanent magnet motorsSerracanta Pujol, BielElectric machinesElectric motorsElectric drivingMàquines elèctriquesMotors elèctricsAccionament elèctricÀrees temàtiques de la UPC::Enginyeria elèctricaThis thesis presents the development of an open-source optimisation framework for the prelim- inary design and comparative analysis of high-performance permanent magnet synchronous motors (PMSMs). The proposed methodology combines multi-objective evolutionary optimi- sation with finite element electromagnetic simulations to systematically explore the trade-offs inherent in electric machine design. The optimisation problem is formulated using the Non-Dominated Sorting Genetic Algorithm II (NSGA-II), enabling the simultaneous optimisation of conflicting objectives such as maximising electromagnetic torque and minimising active mass. Candidate motor geometries are evaluated through automated two-dimensional magnetostatic simulations using FEMM 4.2, with geome- try generation, meshing, solution and post-processing fully scripted via Python. This approach allows thousands of physically consistent motor designs to be analysed under realistic electro- magnetic constraints, including magnetic saturation limits, current density bounds and inverter voltage restrictions. The framework is applied to a representative high-performance traction application based on Formula Student in-wheel motor requirements. Electrical, geometrical and thermal constraints derived from the vehicle powertrain define a realistic and highly coupled design space. The optimisation results produce Pareto fronts that clearly reveal the trade-off between torque ca- pability and machine mass, while highlighting the impact of magnetic loading, slot geometry, magnet thickness and axial length on overall performance. Beyond demonstrating numerical convergence and computational scalability through parallel evaluation, the results confirm that the obtained solutions follow physically meaningful trends consistent with established electric machine design theory. The framework is shown to be suit- able for early-stage motor sizing, topology comparison and design space exploration. By relying exclusively on open-source tools, the proposed methodology offers a transparent, extensible and cost-effective alternative to commercial motor design software. It provides a valuable platform for both academic research and engineering education, while supporting the long-term objective of developing in-house motor design capabilities for high-performance elec- tric propulsion systems.Universitat Politècnica de CatalunyaMedina Iglesias, Vicente César de20262026-02-0420262026-03-04master thesishttp://purl.org/coar/resource_type/c_bdccNAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/masterThesisapplication/pdfhttps://hdl.handle.net/2117/456716reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/4567162026-05-27T15:37:01Z
dc.title.none.fl_str_mv General sizing of permanent magnet motors
title General sizing of permanent magnet motors
spellingShingle General sizing of permanent magnet motors
Serracanta Pujol, Biel
Electric machines
Electric motors
Electric driving
Màquines elèctriques
Motors elèctrics
Accionament elèctric
Àrees temàtiques de la UPC::Enginyeria elèctrica
title_short General sizing of permanent magnet motors
title_full General sizing of permanent magnet motors
title_fullStr General sizing of permanent magnet motors
title_full_unstemmed General sizing of permanent magnet motors
title_sort General sizing of permanent magnet motors
dc.creator.none.fl_str_mv Serracanta Pujol, Biel
author Serracanta Pujol, Biel
author_facet Serracanta Pujol, Biel
author_role author
dc.contributor.none.fl_str_mv Medina Iglesias, Vicente César de
dc.subject.none.fl_str_mv Electric machines
Electric motors
Electric driving
Màquines elèctriques
Motors elèctrics
Accionament elèctric
Àrees temàtiques de la UPC::Enginyeria elèctrica
topic Electric machines
Electric motors
Electric driving
Màquines elèctriques
Motors elèctrics
Accionament elèctric
Àrees temàtiques de la UPC::Enginyeria elèctrica
description This thesis presents the development of an open-source optimisation framework for the prelim- inary design and comparative analysis of high-performance permanent magnet synchronous motors (PMSMs). The proposed methodology combines multi-objective evolutionary optimi- sation with finite element electromagnetic simulations to systematically explore the trade-offs inherent in electric machine design. The optimisation problem is formulated using the Non-Dominated Sorting Genetic Algorithm II (NSGA-II), enabling the simultaneous optimisation of conflicting objectives such as maximising electromagnetic torque and minimising active mass. Candidate motor geometries are evaluated through automated two-dimensional magnetostatic simulations using FEMM 4.2, with geome- try generation, meshing, solution and post-processing fully scripted via Python. This approach allows thousands of physically consistent motor designs to be analysed under realistic electro- magnetic constraints, including magnetic saturation limits, current density bounds and inverter voltage restrictions. The framework is applied to a representative high-performance traction application based on Formula Student in-wheel motor requirements. Electrical, geometrical and thermal constraints derived from the vehicle powertrain define a realistic and highly coupled design space. The optimisation results produce Pareto fronts that clearly reveal the trade-off between torque ca- pability and machine mass, while highlighting the impact of magnetic loading, slot geometry, magnet thickness and axial length on overall performance. Beyond demonstrating numerical convergence and computational scalability through parallel evaluation, the results confirm that the obtained solutions follow physically meaningful trends consistent with established electric machine design theory. The framework is shown to be suit- able for early-stage motor sizing, topology comparison and design space exploration. By relying exclusively on open-source tools, the proposed methodology offers a transparent, extensible and cost-effective alternative to commercial motor design software. It provides a valuable platform for both academic research and engineering education, while supporting the long-term objective of developing in-house motor design capabilities for high-performance elec- tric propulsion systems.
publishDate 2026
dc.date.none.fl_str_mv 2026
2026-02-04
2026
2026-03-04
dc.type.none.fl_str_mv master thesis
http://purl.org/coar/resource_type/c_bdcc
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/456716
url https://hdl.handle.net/2117/456716
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universitat Politècnica de Catalunya
publisher.none.fl_str_mv Universitat Politècnica de Catalunya
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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