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Energies
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Novel Designs, Modeling and Sizing Optimization of Electrical Machines
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Novel Designs, Modeling and Sizing Optimization of Electrical Machines

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F: Electrical Engineering".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 8965

Special Issue Editors

Dr. Sami Hlioui

E-Mail Website
Guest Editor
Laboratoire SATIE, UMR CNRS 8029 Ecole Normale Supérieure Paris-Saclay, Université Paris Saclay, 4, avenue des Sciences, 91190 Gif-sur-Yvette, France
Interests: design of electrical machines; synchronous machines; electromagnetic models; thermal and mechanical models; sizing optimization
Dr. Nicolas Bernard

E-Mail Website
Guest Editor
Nantes Atlantique Electrical Engineering Research Institute (IREENA), University of Nantes, 44035 Nantes, France
Interests: design of electrical machines; cycle optimization; high-speed machines; sizing methodologies for high-speed machines; fractional slot windings

Special Issue Information

Dear Colleagues,

The Guest Editors are inviting submissions to a Special Issue of Energies on the subject area of “Novel Designs, Modeling, and Sizing Optimization of Electrical Machines”.

In many applications today, the constraints are often severe and of different natures, pushing the designers of electrical machines to develop specific topologies and sizing methodologies.

The increase in specific power, for example, leads to pushing the magnetic saturation and heating constraints beyond the limits usually acceptable by conventional analytical models. Electrical machines are also increasingly bigger, considering their working cycle with the search for a complex compromise between energy efficiency, mass, cost, etc. Considering the working cycle, the control strategy (flux weakening management) thus becomes an important part of the problem, directly impacting the design of the machine.

Taking all of these constraints into account therefore leads to the development of specific sizing tools and methods.

The goal of this Special Issue is to highlight the impact of these optimizations under strong and multiple constraints in the design of electrical machines, highlight the development of more efficient technological solutions (cooling, materials, power supply, etc.) or adapted sizing methodologies (multiscale optimization, multiphysics, design considering working cycle, etc.).

Dr. Sami Hlioui
Dr. Nicolas Bernard
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Electrical machines 
  • Design methodology 
  • Design optimization 
  • Working cycle 
  • Electromagnetic and thermal design methods 
  • Multiobjective optimization 
  • Novel machine topologies 
  • Multiphysics constraints

Published Papers (4 papers)

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Research

13 pages, 7278 KiB  
Article
A Study on MG-PMSM for High Torque Density of 45 kW–Class Tram Driving System
by Ik-Hyun Jo, Ju Lee, Hyung-Woo Lee, Jae-Bum Lee, Jae-Hyeon Lim, Seong-Hwi Kim and Chan-Bae Park
Energies 2022, 15(5), 1749; https://doi.org/10.3390/en15051749 - 26 Feb 2022
Cited by 8 | Viewed by 2135
Abstract
This paper reports the design of a magnetic-geared permanent magnet synchronous motor (MG-PMSM) for a 45 kW tram traction system based on high torque density. In the case of the existing tram driving system, due to mechanical reduction gear and induction motor, it [...] Read more.
This paper reports the design of a magnetic-geared permanent magnet synchronous motor (MG-PMSM) for a 45 kW tram traction system based on high torque density. In the case of the existing tram driving system, due to mechanical reduction gear and induction motor, it causes power transmission loss, low efficiency, and difficulty in lightweight. To solve this problem, research on the MG-PMSM, which combines a contactless magnetic gear with a high-power-density PMSM, is being actively conducted. This motor has a double rotor structure, and the inner rotor, including permanent magnet, and the outer rotor composed of pole-pieces rotate at different mechanical speeds. However, it is hard to design a tram driving system with a high torque density within limited conditions, because only one rotor in MG-PMSM is used as an output. In addition, there is no study conducted from basic design to final design, including gear ratio and topology selection in MG-PMSM for tram. Therefore, this paper presents the design process of MG-PMSM with high torque density to be applied to the 45 kW–class tram driving system. After designing the magnetic gear part that increases torque and efficiency by selecting an appropriate topologies-and-gear ratio that meets the constraints, the final finite elements method (FEM) model and electromagnetic field analysis results were derived by considering the number of poles and the number of slots. Through this, we confirmed that it is superior in output characteristics compared to the existing induction motor + mechanical gear. Full article
(This article belongs to the Special Issue Novel Designs, Modeling and Sizing Optimization of Electrical Machines)
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26 pages, 14062 KiB  
Article
Concept, Feasibility of Cylindrical Bar Winding for Low Voltage Permanent Magnet Synchronous Motor
by Mourad Aitakkache, Philippe Enrici, Daniel Matt, Nadhem Boubaker and Lorenzo Piscini
Energies 2022, 15(4), 1507; https://doi.org/10.3390/en15041507 - 17 Feb 2022
Cited by 3 | Viewed by 2635
Abstract
In this paper, we present the use of a solid bar winding for a permanent magnet synchronous motor dedicated to the electric drive of a full electric boat. For the winding, we chose to use cylindrical bars for the electric vehicle motorizations of [...] Read more.
In this paper, we present the use of a solid bar winding for a permanent magnet synchronous motor dedicated to the electric drive of a full electric boat. For the winding, we chose to use cylindrical bars for the electric vehicle motorizations of a power lower than 10 kW. The choice of a 60 VDC low-voltage power distribution requires resorting to a solid bar winding with one bar per slot (single turn). Hence, the solid conductors dissipate additional copper losses (higher AC resistance). An analysis of these additional copper losses was carried out to accurately assess the effective AC resistance of the winding and, hence, the efficiency of the electric motor. A prototype for a POD propulsion was designed, built and tested. The characteristics of its electric motor were presented. The feasibility this type of cylindrical bar winding has been proven. A study on the optimization of the slot has demonstrated the performance of this type of winding. Full article
(This article belongs to the Special Issue Novel Designs, Modeling and Sizing Optimization of Electrical Machines)
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19 pages, 8127 KiB  
Article
Optimization, 3D-Numerical Validations and Preliminary Experimental Tests of a Wound Rotor Synchronous Machine
by Huong Thao Le Luong, Frédéric Messine, Carole Hénaux, Guilherme Bueno Mariani, Nicolas Voyer, Stefan Mollov and Dominique Harribey
Energies 2021, 14(23), 8118; https://doi.org/10.3390/en14238118 - 3 Dec 2021
Viewed by 1602
Abstract
In this paper, a complete methodology to design a modular brushless wound rotor synchronous machine is proposed. From a schedule of conditions and a chosen structure (with 7 phases, 7 slots and 6 poles), a non-linear and non-convex optimization problem is defined and [...] Read more.
In this paper, a complete methodology to design a modular brushless wound rotor synchronous machine is proposed. From a schedule of conditions and a chosen structure (with 7 phases, 7 slots and 6 poles), a non-linear and non-convex optimization problem is defined and solved using NOMAD (a derivative free local optimization code): the external volume is minimized under some constraints, which are the average torque equal to 5 Nm, the torque ripple less than 5%, the efficiency greater than 94%, and the surface temperature less than 85 °C. The constraints have to be computed using 2D-finite element simulations in order to reduce the CPU-time consumption for each NOMAD iteration. Moreover, a relaxation of this optimization problem makes it possible to provide an efficient starting point for NOMAD. Thus, a good optimal design is obtained, and it is then validated by using 3D electromagnetic and thermic numerical methods. These numerical verifications show that, inside the end-winding, the leakage flux is high. This yields a lot of iron losses in this machine. Moreover, the surface and coil temperature differences between the 2D and 3D numerical approaches are discussed. Finally, the machine prototype is built following the optimal dimensions and a POKI-POKITM assembly technology. Preliminary experimental tests are carried out, and the results are devoted to the comparison of measured and predicted 3D numerical results. Full article
(This article belongs to the Special Issue Novel Designs, Modeling and Sizing Optimization of Electrical Machines)
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17 pages, 4704 KiB  
Article
Co-Design Optimization of Direct Drive PMSGs for Offshore Wind Turbines Based on Wind Speed Profile
by Linh Dang, Serigne Ousmane Samb, Ryad Sadou and Nicolas Bernard
Energies 2021, 14(15), 4486; https://doi.org/10.3390/en14154486 - 24 Jul 2021
Cited by 5 | Viewed by 1776
Abstract
This paper presents a new method to optimize, from a working cycle defined by torque and speed profiles, both the design and the control strategy of permanent magnet synchronous generators (PMSGs). The case of a 10 MW direct-drive permanent magnet generator for an [...] Read more.
This paper presents a new method to optimize, from a working cycle defined by torque and speed profiles, both the design and the control strategy of permanent magnet synchronous generators (PMSGs). The case of a 10 MW direct-drive permanent magnet generator for an Offshore wind turbine was chosen to illustrate this method, which is based on the d–q axis equivalent circuit model. It allows to optimize, with a reduced computation time, the design, considering either a flux weakening control strategy (FW) or a maximum torque per Ampere control (MTPA) strategy, while respecting all the constraints—particularly the thermal constraint, which is characterized by a transient regime. The considered objective is to minimize the mass and the average electric losses over all working points. Thermal and magnetic analytical models are validated by a 2D finite element analysis (FEA). Full article
(This article belongs to the Special Issue Novel Designs, Modeling and Sizing Optimization of Electrical Machines)
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