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Energies
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Fail-Safe Electric Drives and Safety-Related Issues
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Fail-Safe Electric Drives and Safety-Related Issues

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "E: Electric Vehicles".

Deadline for manuscript submissions: closed (30 April 2021) | Viewed by 7799

Special Issue Editors

Dr. Fabrizio Marignetti

E-Mail Website
Guest Editor
Department of Electrical and Information Engineering, University of Cassino and South Lazio, via G. Di Biasio 43, 03043 Cassino FR, Italy
Interests: power electronic converters, machines and electric drives covering a wide range of power applied in various sustainable development systems
Special Issues, Collections and Topics in MDPI journals
Prof. Roberto Di Stefano

E-Mail Website
Guest Editor
Department of Electrical and Information Engineering, University of Cassino and South Lazio, via G. Di Biasio 43, 03043 Cassino FR, Italy
Interests: electrical machines and drives; renewable energy; electric vehicles; power electronic converters.

Special Issue Information

Dear Colleagues,

Electrical drives for transportation, civil, and industrial applications must guarantee operation in emergency conditions. In critical events, such as faults, floods, explosions, fires, and earthquakes, electric drives must be operated to prevent further damages and, very often, even to guarantee the minimal operation of the plant or of the vehicle in order to help save human lives. Electrical components and systems must be designed to operate in critical conditions or to withstand faults, extreme temperatures, and pressures.

In order to provide safe operation, many methods have been developed: some are based on special hardware structure of the hardware, like using multi-phase machines and converters to increase redundancy, while some others rely on software to execute special communication for coordination tasks between drives or fault detection.

This Special Issue is dedicated to the analysis of electric drives and drive components under these conditions and welcomes scientific contributions in this emerging area.

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

  • Fail-safe transformers, electrical machines, and cables;
  • Multi-phase electric machines and drives;
  • Magnet-less electrical machines;
  • Risk assessment of electrical drives and components;
  • Fire performance of powertrains and power switches;
  • Electric drive diagnosis;
  • Communications for emergency critical operations.

Prof. Dr. Fabrizio Marignetti
Prof. Roberto Di Stefano
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

  • Safety
  • faults
  • diagnostic techniques
  • faults of electric drives
  • fire safety
  • fail-safe transformers
  • fail-safe electric machines and drives
  • magnetless electric machines
  • emergency communications of electric drives
  • noise
  • vibrations
  • NVH
  • octave maps
  • SPL
  • waterfall graphics.

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Published Papers (3 papers)

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Research

24 pages, 3977 KiB  
Article
Developing Induction Motor State Observers with Increased Robustness
by Tadeusz Białoń, Marian Pasko and Roman Niestrój
Energies 2020, 13(20), 5487; https://doi.org/10.3390/en13205487 - 20 Oct 2020
Cited by 9 | Viewed by 2213
Abstract
This paper presents the results of recently conducted research on Luenberger observers with non-proportional feedbacks. The observers are applied for the reconstruction of magnetic fluxes of an induction motor. Structures of the observers known from the control theory are presented. These are a [...] Read more.
This paper presents the results of recently conducted research on Luenberger observers with non-proportional feedbacks. The observers are applied for the reconstruction of magnetic fluxes of an induction motor. Structures of the observers known from the control theory are presented. These are a proportional observer, a proportional-integral observer, a modified integral observer, and an observer with additional integrators. The practical application of some of these observers requires modifications to their structures. In the paper, the simulation results for all mentioned types of observers are presented. The simulations are performed with a Scilab-Xcos model which is attached to this paper. The problem of gains selection of the observers is discussed. Gains are selected with the described optimization method based on a genetic algorithm. A Scilab file launching the genetic algorithm also is attached to this paper. Full article
(This article belongs to the Special Issue Fail-Safe Electric Drives and Safety-Related Issues)
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13 pages, 5175 KiB  
Article
A General Investigation on the Differential Leakage Factor for Symmetrical and Asymmetrical Multiphase Winding Design
by Massimo Caruso, Antonino Oscar Di Tommaso, Fabrizio Marignetti and Rosario Miceli
Energies 2020, 13(20), 5414; https://doi.org/10.3390/en13205414 - 16 Oct 2020
Cited by 2 | Viewed by 2410
Abstract
This work provides an investigation based on a fast estimation of the degree of unbalance (D.U.%) and the differential leakage factor (σ0) of multiphase electrical machine windings. This analysis is carried out by exploring [...] Read more.
This work provides an investigation based on a fast estimation of the degree of unbalance (D.U.%) and the differential leakage factor (σ0) of multiphase electrical machine windings. This analysis is carried out by exploring almost 5000 combinations in terms of number of slots, pole pairs, phases and layers. The variability of the leakage factor is examined for each condition, defining an optimal region for its minimization. As a result, an extended mapping is carried out for both the degree of unbalance and the leakage factor, providing a useful tool during the early design stage of winding configurations for multiphase electric machines, even with slight asymmetries. The results obtained from this investigation are validated through finite element analysis and demonstrate that the differential leakage factor can be significantly reduced by adopting winding configurations with slight asymmetries, which also represent a valuable alternative in the electrical machine design. Full article
(This article belongs to the Special Issue Fail-Safe Electric Drives and Safety-Related Issues)
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19 pages, 25124 KiB  
Article
Development and Laboratory Testing of a Self-Excited Synchronous Machines without Permanent Magnets
by Fabrizio Marignetti, Roberto Luigi Di Stefano, Guido Rubino and Paolo Conti
Energies 2020, 13(15), 3966; https://doi.org/10.3390/en13153966 - 1 Aug 2020
Cited by 1 | Viewed by 2500
Abstract
Today, self-excited synchronous machines are the object of increasing interest because they use neither brushes nor permanent magnets. In fact, the price of rare earth metals is considerably high and still raising. This is the main reason why researchers are looking for suitable [...] Read more.
Today, self-excited synchronous machines are the object of increasing interest because they use neither brushes nor permanent magnets. In fact, the price of rare earth metals is considerably high and still raising. This is the main reason why researchers are looking for suitable alternatives to permanent magnets in the construction of rotating electrical machinery. This paper deals with the design and laboratory testing of a synchronous machine with an efficient layout and an economic construction. The proposed self-excited machine exploits the space harmonics of the magneto-motive force to produce the excitation field. The model analysis is based on the computation of the back EMFs that are associated to the magneto motive force components. The mathematical model suggests an easy way to decouple the rotor windings. The machine has been built and experimental tests have been performed in order to validate the electrical behavior. Full article
(This article belongs to the Special Issue Fail-Safe Electric Drives and Safety-Related Issues)
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