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Special Issue Editors

Special Issue Information

Dear Colleagues,

In the coming years, global trends will continue to reduce carbon emissions from engines and fuel consumption, and hence the development of electric machines will surely continue. The aim of this Special Issue is to encourage scientists to publish their theoretical, simulation and experimental research related to a wide range of topics connected to electric machines and motor drives. We invite authors to submit articles connected with new trends in the field of electric machine and motor drives, for example renewable energy systems (including permanent magnet machines) and solutions for vehicle systems, which are also currently growing rapidly. Experts in this field are encouraged to share their latest discoveries in the form of original research papers. The works presented in this Special Issue should concern issues related to the design, operation and optimization of electric machines and motor drives, as well as descriptions of the newest solutions in this topic.

In the case of simulation studies, we particularly encourage authors to present the results of calculation-based analysis using FEM tools as well as methods based on equivalent circuit models and others as an alternative to FEM research.

The focuses of this Special Issue include, without being limited to, the following themes:

New trends and solutions in electric machines and motor drives;
Renewable energy generators;
Vehicle systems;
Industry applications;
Automotive applications;
Diagnostics of electrical machines.

It is our pleasure to invite you to submit your original work to our Special Issue. We look forward to receiving your outstanding research.

Dr. Natalia Radwan-Pragłowska
Prof. Dr. Tomasz Wegiel
Prof. Dr. Maciej Sułowicz
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.

Related Special Issue

Published Papers (1 paper)

Research

18 pages, 5800 KiB

Open AccessArticle

Research on Analysis and Suppression Methods of the Bearing Current for Electric Vehicle Motor Driven by SiC Inverter

by Mingliang Yang, Yuan Cheng, Bochao Du, Yukuan Li, Sibo Wang and Shumei Cui

Energies 2024, 17(5), 1109; https://0-doi-org.brum.beds.ac.uk/10.3390/en17051109 - 26 Feb 2024

Viewed by 484

Abstract

The silicon carbide (SiC) inverter brings great advantages to the motor drive systems of new energy vehicles; however, severe challenges to the bearings also happen. The high dc bus voltage and switching frequency of SiC inverter can increase the discharge frequency and energy when the bearing grease film collapses. As a result, the bearing suffers severe electric corrosion, and the service life of the motor drive system can be shortened. In this paper, the characteristics of common-mode voltage and bearing voltage are analyzed, firstly under space vector pulse width modulation (SVPWM). After that, the common-mode equivalent circuit model of the motor drive system is established. The frequency characteristics of bearing voltage are revealed, and the safe working area is determined. Then, the frequency characteristics of bearing voltage and current are verified based on IGBT and SiC inverters in experiments. After that, by designing a common-mode filter, the bearing voltage and current are significantly attenuated. Furthermore, the active zero state PWM (AZSPWM) is adopted to reduce the common-mode voltage from the inverter. At the same time, combined with the common-mode filter, the bearing voltage and current are further reduced. The experimental results show that the switching frequency has a decisive effect on the amplitude of bearing voltage and current. The bearing voltage can be attenuated to around half of the reference bearing voltage by using the common-mode filter and AZSPWM strategy, respectively. The combination of the common-mode filter and AZSPWM strategy can reduce the bearing voltage to around one-fourth of the reference bearing voltage, which can effectively reduce the breakdown time and discharge energy of the grease oil film. Full article

(This article belongs to the Special Issue New Solutions in Electric Machines and Motor Drives: 2nd Edition)

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