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Development of Electromechanical Systems Integrated in the Renewable Energy Systems

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

Deadline for manuscript submissions: closed (20 June 2022) | Viewed by 4631

Special Issue Editor


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Guest Editor
Department of Electrical Machines and Drives, Technical University of Cluj-Napoca, 400114 Cluj-Napoca, Romania
Interests: inner and outer permanent synchronous machine; vernier machine; electrical vehicles; propulsion systems; wind conversion system, generators for renewables based system
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Special Issue Information

Dear Colleagues, 

The Guest Editor is inviting submissions to a Special Issue of Energies on the subject of the development of electromechanical systems integrated in renewable energy systems. In the context of global warming today, renewable energy systems have become most important in electrical production. Electromechanical systems for renewable energy systems have developed remarkably during the latest decade. Due to its flexibility, it can be used in practically all energy systems types for all ranges of power. 

The Special Issue aims to provide an opportunity for researchers to present their recent work on the electromechanical systems dedicated to renewable energy systems. We welcome any article dealing with:

  • Modeling of complex electromechanical systems
  • Modeling electric drives for renewable energy systems (wind, hydro, solar, wave e systems, etc.) for accurate response
  • New emerging technologies for electric drives in various energy systems
  • New generator types: rotational machines, linear machines, modular machines, with/without permanent magnets, etc.
  • Model validation
  • Noise, vibration, and heat analysis on electric drives
  • Cost evaluation of renewable energy system: case studies
  • Control systems and power management strategies for renewable energy systems

Dr. Jurca Florin
Guest Editor

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

  • Energy production
  • Renewable energy
  • Electromechanical systems
  • New topologies
  • Modeling validation
  • Control systems

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Published Papers (2 papers)

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Research

24 pages, 6864 KiB  
Article
Optimization of Flywheel Rotor Energy and Stability Using Finite Element Modelling
by Daniel Coppede, Fabio da Silva Bortoli, Joao Manoel Losada Moreira, Nadja Simao Magalhaes and Carlos Frajuca
Energies 2024, 17(12), 3042; https://doi.org/10.3390/en17123042 - 20 Jun 2024
Viewed by 816
Abstract
An investigation on a flywheel is presented based on finite element modelling simulations for different geometries. The goal was to optimise the energy density (rotational energy-to-mass ratio) and, at the same time, the rotational energy of a flywheel rotor. The stress behaviour of [...] Read more.
An investigation on a flywheel is presented based on finite element modelling simulations for different geometries. The goal was to optimise the energy density (rotational energy-to-mass ratio) and, at the same time, the rotational energy of a flywheel rotor. The stress behaviour of flywheel rotors under the rotational speed at the maximum stress achievable by the flywheel was analysed. Under this condition, the energy density was obtained for the different geometries, as well as the rotational energy. The best energy density performance due to geometry was achieved with a flywheel rotor presenting a new Gaussian section, which is different from the known Laval disk shape. The best results using a single disk involved a rotational speed of nearly 279,000 rpm and a rotational energy density around 1584 kJ/kg (440 Wh/kg). These values still yielded low total energy; to increase its value, two or three rotors were added to the flywheel, which were analysed in regard to stability. In particular, the triple rotor energy density was ≈ 1550 kJ/kg (431 Wh/kg). As some instability was found in these rotors, a solution using reinforcement was developed to avoid such instabilities. The energy density of such a reinforced double rotor neared 1451 kJ/kg (403 Wh/kg), and the system achieved higher total energy. The material assumed for the devices was carbon fibre Hexcel UHM 12,000, a material kept constant throughout the simulations to allow comparison among the different geometries. Full article
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26 pages, 7699 KiB  
Article
Efficiency Enhancement of Switched Reluctance Generator Employing Optimized Control Associated with Tracking Technique
by Wanderson R. H. Araujo, Marcio R. C. Reis, Gabriel A. Wainer and Wesley P. Calixto
Energies 2021, 14(24), 8388; https://doi.org/10.3390/en14248388 - 13 Dec 2021
Cited by 11 | Viewed by 3258
Abstract
This article presents studies related to the driving and control of the switched reluctance generator in order to enhance its efficiency. This type of electrical machine is an option for wind energy conversion systems, favoring the generation of electricity in distributed generation systems [...] Read more.
This article presents studies related to the driving and control of the switched reluctance generator in order to enhance its efficiency. This type of electrical machine is an option for wind energy conversion systems, favoring the generation of electricity in distributed generation systems and contributing positively to loads without access to the main grid. The studies developed in this paper verify the possibility of controlling the output voltage of the switched reluctance generator in parallel with an efficiency tracking technique acting on the switching angles of the power converter. Simulation and experimental results are presented in order to verify the feasibility of implementing this technique to enhance the efficiency of the generator. Full article
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