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Energies
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New Challenges and Development of Electric Machines
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New Challenges and Development of Electric Machines

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

Deadline for manuscript submissions: 19 December 2024 | Viewed by 8968

Special Issue Editors

Dr. Marcin Wardach

E-Mail Website
Guest Editor
Faculty of Electrical Engineering, Department of Power Systems and Electrical Drives, West Pomeranian University of Technology in Szczecin, al. Piastów 17, 70-310 Szczecin, Poland
Interests: electrical machines; numerical field calculations; optimization of electromagnetic fields; renewable energy technologies; electrical engineering; power generation
Special Issues, Collections and Topics in MDPI journals
Dr. Paweł Prajzendanc

E-Mail Website
Guest Editor
Department of Electrical Engineering and Power Electronics, Maritime University of Szczecin, 70-500 Szczecin, Poland
Interests: electric machines with hybrid excitation; magnetic field analysis by finite element method

Special Issue Information

Dear Colleagues,

The use of electric machines has become so common and obvious that most people do not pay attention to their existence. However, electric machines, which perform both driving and control tasks in many applications, are responsible for the correct and failure-free operation of many systems. They are at the heart of the new industrial revolution brought forth by the development of electromobility and renewable energy systems. On the other hand, engineers and scientists who create and design new drive solutions know about these aspects. Scientists from around the world are trying to develop a technological solution in terms of construction, power supply, and control of electrical machines in order to convert energy with their participation as efficiently as possible. This Special Issue aims to present and disseminate the research and its results of the theory, design, modelling, application, and control of all types of rotating and linear electric machines.

I kindly encourage scientists and engineers to present the results of their original research as well as review papers in the field of design and application of electric machines.

Topics of interest for publication include, but are not limited to:

  • Generators in renewable energy sources;
  • Novel applications of electric machines;
  • Electric machines technologies for electric vehicles and wind energy conversion systems;
  • Hybrid excited electric machines;
  • Unconventional design of electric machines;
  • Machine optimisation processes;
  • Thermal and mechanical analyses;
  • Power electronics systems used for control electrical machines;
  • Supply and control techniques of electrical machines;
  • Simulation tools, modelling and analysis of electrical machines;
  • All other aspects of permanent magnet synchronous machines, synchronous reluctance machines, induction machines, switched reluctance machines, brushless dc machines, linear machines, etc.

Dr. Marcin Wardach
Dr. Paweł Prajzendanc
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

  • electric machines
  • standard and new designs
  • hybrid excited machines
  • new applications
  • modelling and optimization
  • control
  • numerical field calculations
  • electrical vehicles
  • permanent magnet machines
  • wind power energy

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Published Papers (4 papers)

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Research

20 pages, 33448 KiB  
Article
A New Method of Reducing the Inrush Current and Improving the Starting Performance of a Line-Start Permanent-Magnet Synchronous Motor
by Wojciech Szelag, Cezary Jedryczka and Mariusz Baranski
Energies 2024, 17(5), 1040; https://doi.org/10.3390/en17051040 - 22 Feb 2024
Cited by 1 | Viewed by 1143
Abstract
This paper presents a new method of reducing the inrush current and improving the starting performance of a line-start permanent-magnet synchronous motor (LSPMSM). The novelty of the proposed method relies on the selection of the time instant of the connection of the stator [...] Read more.
This paper presents a new method of reducing the inrush current and improving the starting performance of a line-start permanent-magnet synchronous motor (LSPMSM). The novelty of the proposed method relies on the selection of the time instant of the connection of the stator winding to the grid, for which the smallest values of the amplitudes of inrush currents are obtained. To confirm the effectiveness of the developed method of limiting the inrush current, simulations and experimental studies were carried out. The algorithm and dedicated computer code developed by the authors for the analysis of transient coupled phenomena in the LSPMSM were used to study the impact of the time instant of connection of the winding to the grid on the motor start-up process. The algorithm was based on a field model of coupled electromagnetic and thermal phenomena in the studied motor. To verify the developed model of the phenomena and the proposed method, experimental research was carried out on a purpose-built computerised test stand. Good concordance between the results of the experiments and simulations confirmed the high reliability of the proposed model, as well as the effectiveness of the developed approach in limiting the inrush current and improving the starting performance of LSPMSMs. Full article
(This article belongs to the Special Issue New Challenges and Development of Electric Machines)
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14 pages, 8355 KiB  
Article
Research on Innovative Hybrid Excited Synchronous Machine
by Ryszard Palka, Kamil Cierzniewski, Marcin Wardach and Pawel Prajzendanc
Energies 2023, 16(18), 6600; https://doi.org/10.3390/en16186600 - 13 Sep 2023
Cited by 1 | Viewed by 1243
Abstract
This paper presents research on an unconventional electric machine. It is a hybrid excited machine which includes the features of three types of machines: the Permanent Magnet Synchronous Machine, the Synchronous Machine, and the Synchronous Reluctance Machine. Therefore, a broad literature review related [...] Read more.
This paper presents research on an unconventional electric machine. It is a hybrid excited machine which includes the features of three types of machines: the Permanent Magnet Synchronous Machine, the Synchronous Machine, and the Synchronous Reluctance Machine. Therefore, a broad literature review related to the above-mentioned types of machines was constructed. The well-known Permanent Magnet assisted Synchronous Reluctance Machine joins features of Permanent Magnet Synchronous Machine and Synchronous Reluctance Machine topologies. This paper shows the results of the innovative design of the Hybrid Excited Permanent Magnet assisted Synchronous Reluctance Machine, which additionally has advantages of the Synchronous Machine. In the article the basic methods of electromagnetic flux control and the designs using them are also presented. Finally, the results of simulation studies of the effect of the stator skew on the machine performance are described. Full article
(This article belongs to the Special Issue New Challenges and Development of Electric Machines)
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14 pages, 4711 KiB  
Article
Permanent Magnet Selections for AFPM Disc Generators
by Natalia Radwan-Pragłowska and Tomasz Węgiel
Energies 2022, 15(20), 7601; https://doi.org/10.3390/en15207601 - 14 Oct 2022
Cited by 3 | Viewed by 2223
Abstract
In this article, the field (FEM) and analytical analyses were used for the optimal selection of magnets material for the Axial Flux Permanent Magnet Generator (AFPMG), without building the prototype before. The tested generator is an axial flux machine which consists of a [...] Read more.
In this article, the field (FEM) and analytical analyses were used for the optimal selection of magnets material for the Axial Flux Permanent Magnet Generator (AFPMG), without building the prototype before. The tested generator is an axial flux machine which consists of a single stator and two rotor discs with Permanent Magnets (PM). Three-dimensional (3D) ANSYS Maxwell package was used for magnetostatic and transient field (FEM) simulations. Two types of PM were selected for the analysis: Ceramic (also known as “Ferrite”) magnets made from Strontium Ferrite powder and Neodymium Iron Boron magnets (NdFeB). The authors compared obtained electromotive forces (EMF) and generator powers for selected magnets materials, performed FFT analyses of voltages and currents and indicated the optimal solutions. In addition to the operational properties of the AFPMG, the magnet and manufacturing costs were compared. Full article
(This article belongs to the Special Issue New Challenges and Development of Electric Machines)
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13 pages, 1917 KiB  
Article
Design and Analysis of Three Phase Axial Flux Permanent Magnet Machine with Different PM Shapes for Electric Vehicles
by Ziaul Islam, Faisal Khan, Basharat Ullah, Ahmad H. Milyani and Abdullah Ahmed Azhari
Energies 2022, 15(20), 7533; https://doi.org/10.3390/en15207533 - 12 Oct 2022
Cited by 6 | Viewed by 3209
Abstract
Axial flux permanent magnet (AFPM) machines are good candidates for electric vehicle applications due to their high torque density, improved efficiency, and better flux distribution; thus, they are often used. A dual-rotor single-stator AFPM machine with four differently shaped permanent magnet (PM) rotors [...] Read more.
Axial flux permanent magnet (AFPM) machines are good candidates for electric vehicle applications due to their high torque density, improved efficiency, and better flux distribution; thus, they are often used. A dual-rotor single-stator AFPM machine with four differently shaped permanent magnet (PM) rotors is investigated. The main aim of this paper is to enhance the average torque while minimizing the cogging torque and torque ripples at the expense of low PM volume. The proposed machines are analyzed in terms of flux linkage, back-EMF, cogging torque, average torque, and torque ripples. The analysis reveals that the machine with an arc-shaped PM rotor performs better than the others. In addition, the trapozoidal arc-shaped PM used in the AFPM machine outperforms the hexagonal, skew arc, and traditional trapezoidal PMs. The torque density of the trapezoidal-shaped PM machine is 40.23 (KNm/m3), while that of the hexagonal shape is 32.46 (KNm/m3), that of the skew arc shape is 39.78 (KNm/m3), and that of the arc shape is 50.38 (KNm/m3). Full article
(This article belongs to the Special Issue New Challenges and Development of Electric Machines)
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