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Energies
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Magnetic Field Computations and Energy Efficiency Studies in Electrical Machines
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Special Issue "Magnetic Field Computations and Energy Efficiency Studies in Electrical Machines"

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

Deadline for manuscript submissions: 21 July 2023 | Viewed by 3411

Special Issue Editors

Dr. Dan-Cristian Popa

E-Mail Website
Guest Editor
Department of Electrical Machines and Drives, Technical University of Cluj-Napoca, 28 Memorandumului Street, 400114 Cluj-Napoca, Romania
Interests: design of electric machines; numerical and analytical analysis; transverse flux machines; induction machines; transformers
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Emil Cazacu

E-Mail Website
Guest Editor
Department of Electrical Engineering, Faculty of Electrical Engineering, University “POLITEHNICA” of Bucharest, 313 Splaiul Independentei, RO-060042 Bucharest, Romania
Interests: numerical computation, power quality investigations, energy efficiency studies, electromagnetic levitation, transformers operating analysis

Special Issue Information

Dear colleagues,

The need for the efficient and high density power electric machines has led to study of various new topologies and optimization of the classic ones. The use of numerical analysis has become a regular used tool for the evaluation of the performances of the electrical machines. Also, the employment of various analytical models represents an important tool for the above mentioned purpose. In this context, the studies on these topics are always of interest for the researchers in this domain.

This Special Issue aims to publish researches on different topologies of electrical machines, based mainly on, but not limited to Magnetic Field Computations and Energy Efficiency Studies. These analyses are challenging for the researchers as efficiency increases cannot be achieved without finding innovative solutions. Also, analytical and numerical analyses are always subject to approaches leading to remarkable progresses in the study of the electrical machines. Given the above considerations, topics of interest are:

  • Innovative design of rotary and linear machines, with or without permanent magnets
  • Techniques for optimization
  • Analytical and numerical electromagnetic analysis
  • Application of new magnetic materials
  • Thermal and mechanical simulations
  • Control strategies
  • Noise, vibration and heat analysis
  • Energy Efficiency Studies
  • Energetical Optimisation Analysis

Assoc. Prof. Dr. Dan-Cristian Popa
Prof. Dr. Emil Cazacu
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 2200 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

  • Transverse flux machines
  • Magnetic field
  • Numerical analysis
  • Novel topology
  • Optimized design
  • New magnetic materials
  • Losses calculations
  • Control algorithm
  • NVH (noise, vibration, and harshness)
  • Thermal field analysis
  • Energy efficiency
  • Otimisation study

Published Papers (2 papers)

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Article
Numerical Aspects of a Two-Way Coupling for Electro-Mechanical Interactions—A Wind Energy Perspective
by
Fiona Dominique Lüdecke
,
Martin Schmid
,
Eva Rehe
,
Sangamithra Panneer Selvam
,
Nejila Parspour
and
Po Wen Cheng
Energies 2022, 15(3), 1178; https://doi.org/10.3390/en15031178 - 05 Feb 2022
Viewed by 1321
Abstract
Generators in wind turbines are the key components to convert mechanical into electrical power. They are subject to electrical and mechanical excitation at the same time, which can cause electro-mechanical interactions. To avoid unwanted interactions, standard design approaches use conservative, stiff designs that [...] Read more.
Generators in wind turbines are the key components to convert mechanical into electrical power. They are subject to electrical and mechanical excitation at the same time, which can cause electro-mechanical interactions. To avoid unwanted interactions, standard design approaches use conservative, stiff designs that lead to heavy generators of several hundred tons. New wind turbine designs, beyond 10 MW, need to revisit the conservative design approach as the tower top mass needs to be limited. To reduce the generator’s mass without large deformation that can damage the wind turbine, a better understanding of electro-mechanical interactions is key. This requires a detailed model including both the mechanical and the magnetic forces. This work presents a numerical setup of a coupled electromagnetic-structural multi-body model. While existing couplings are application-specific; the presented coupling is independent of the actual use case and allows for transient dynamic two-way coupled analyses. For validation, an experimental setup with basic components is introduced. The results show the applicability of the developed coupling for detailed analysis of general electro-mechanical interactions. Full article
(This article belongs to the Special Issue Magnetic Field Computations and Energy Efficiency Studies in Electrical Machines)
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Article
High-Efficient Brushless Wound Rotor Synchronous Machine Topology Based on Sub-Harmonic Field-Excitation Technique
by
Syed Sabir Hussain Bukhari
,
Qasim Ali
,
Jesús Doval-Gandoy
and
Jong-Suk Ro
Energies 2021, 14(15), 4427; https://doi.org/10.3390/en14154427 - 22 Jul 2021
Cited by 10 | Viewed by 1398
Abstract
This paper presents a new high-efficient three-phase brushless wound rotor synchronous machine (BL-WRSM) based on a sub-harmonic field excitation technique. In the proposed machine topology, the stator is equipped with two different three-phase windings: (1) main armature winding, and (2) additional armature winding. [...] Read more.
This paper presents a new high-efficient three-phase brushless wound rotor synchronous machine (BL-WRSM) based on a sub-harmonic field excitation technique. In the proposed machine topology, the stator is equipped with two different three-phase windings: (1) main armature winding, and (2) additional armature winding. The main armature winding is based on a 4-pole winding configuration, whereas the additional armature winding is based on a 2-pole winding configuration. Both windings are supplied current from two different inverters, i.e., inverter-1, inverter-2, and simultaneously. Inverter-1 provides the regular input current to the main armature winding, whereas inverter-2 provides a three-phase current of low magnitude to the 2-pole additional armature winding. This generates an additional sub-harmonic component of MMF in the airgap beside the fundamental MMF. On the other side, the rotor is equipped with (1) harmonic, and (2) field windings. These windings are electrically coupled via a rectifier. The fundamental component of MMF produces the main rotating magnetic field, whereas the sub-harmonic MMF gets induced in the harmonic winding to produce harmonic current. This current is rectified to give DC to the rotor field winding to attain brushless operation. To authenticate the operation and analyze its performance, the proposed BL-WRSM topology is supported using 2-D finite element analysis (FEA) in JMAG-Designer. Later on, the performance of the proposed brushless topology is compared with the customary BL-WRSM topology to verify its high efficiency, high output torque, low torque ripple, and low unbalanced radial force on the rotor. Full article
(This article belongs to the Special Issue Magnetic Field Computations and Energy Efficiency Studies in Electrical Machines)
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