Special Issue "High Power Electric Traction Systems"

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Power Electronics".

Deadline for manuscript submissions: 31 May 2020.

Special Issue Editors

Prof. Dr. Kyo-Beum Lee
E-Mail Website
Guest Editor
Department of Electrical and Computer Engineering, Ajou University, Worldcupro 206, Yeongtong-gu, Suwon 16499, KOREA
Tel. +82 31 219 2376
Interests: power electronics; electric machine drives; wind and solar energy systems; electric vehicle applications
Special Issues and Collections in MDPI journals
Dr. June-Seok Lee
E-Mail Website
Guest Editor
Korea Railroad Research Institute, Bugok-dong, Uiwang-si, Korea
Interests: high-power electric machine drive; grid connected system; multilevel inverter, reliability

Special Issue Information

Dear Colleagues,

Miniaturization, lightening of weight, and high reliability of traction systems are required for energy saving, running distance improvement, and lifetime extension. New switching devices (Silicon Carbide), the permanent magnet synchronous motor (PMSM), and new power converter/inverter topologies with high-efficiency control schemes have contributed to achieve the needs. This Special Issue focuses on the analysis, design, and implementation of high-power electric traction systems for miniaturization, lightening of weight, and high reliability.

Topics of interest for this Special Issue include, but are not limited to:

  • Control of traction inverter
  • Motor drive schemes for traction system
  • New topology for high-power traction system
  • Reliability of traction systems
  • High voltage silicon carbide (SiC)
  • Battery or hydrogen-powered traction systems
  • Tolerant control of traction system under faults

Prof. Dr. Kyo-Beum Lee
Dr. June-Seok Lee
Guest Editors

Manuscript Submission Information

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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. Electronics is an international peer-reviewed open access monthly journal published by MDPI.

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Published Papers (2 papers)

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Research

Open AccessArticle
A Compromising Approach to Switching Losses and Waveform Quality in Three-phase Voltage Source Converters with Double-vector based Predictive Control Method
Electronics 2019, 8(11), 1372; https://doi.org/10.3390/electronics8111372 - 19 Nov 2019
Abstract
A switching losses reduction technique for the model predictive control (MPC) algorithm, which uses double-vector in the three-phase rectifier, is presented. The proposed method controls the output voltage of the rectifier by using reference rectifier input voltages with the offset voltage injection to [...] Read more.
A switching losses reduction technique for the model predictive control (MPC) algorithm, which uses double-vector in the three-phase rectifier, is presented. The proposed method controls the output voltage of the rectifier by using reference rectifier input voltages with the offset voltage injection to reduce the switching losses. One leg with the largest source current among the three legs in the rectifier is clamped to either the positive or negative output voltage in the proposed method. The proposed method calculates the offset voltage on the basis of the future rectifier input voltages obtained by the reference rectifier input voltage, output voltage, and the source currents in every sampling period, so the clamping region in the leg conducting the largest input current is optimally varied depending on the reference rectifier input voltages and the source currents. Therefore, the proposed method can reduce the switching losses of the rectifier regardless of the different source power factor angle. Due to the effects of clamped legs, the quality of the input current waveform inevitably deteriorated. Thus, in the proposed method, double vectors were utilized to avoid degradation of current qualities and achieved compromised performance by reducing switching losses and keeping the current waveform quality. A performance comparison between the conventional method and the proposed method was made to show performance differences. Additionally, the simulation and experiment were conducted to verify the effectiveness of the proposed method. Full article
(This article belongs to the Special Issue High Power Electric Traction Systems)
Open AccessFeature PaperArticle
Performance Improvement of a Grid-Connected Inverter under Distorted Grid Voltage Using a Harmonic Extractor
Electronics 2019, 8(9), 1038; https://doi.org/10.3390/electronics8091038 - 16 Sep 2019
Abstract
This paper introduces an improved current control strategy for a grid-connected inverter system operating under distorted grid voltage conditions. Although existing current controllers for grid-connected inverters have proportional integral gains with suitable bandwidth, low-order harmonic components can be generated by distorted grid voltages. [...] Read more.
This paper introduces an improved current control strategy for a grid-connected inverter system operating under distorted grid voltage conditions. Although existing current controllers for grid-connected inverters have proportional integral gains with suitable bandwidth, low-order harmonic components can be generated by distorted grid voltages. The proposed improved current controller is established in a synchronous reference frame that rotates at harmonic frequency. The input signals for the harmonic current controller should contain only the specific harmonic components requiring suppression. Therefore, the proposed current controller uses a harmonic extractor to distinguish current signals from fundamental and specific harmonic components. The harmonic extractor retains only the relevant harmonic components for individual current controllers with high harmonic signal ratios. This paper introduces two different strategies to extract specific harmonic components for the current controller. The proposed control strategy does not require any additional hardware filter circuits and can be implemented easily by designing a suitable digital filter. When using the proposed method, grid current quality is significantly improved compared to conventional methods that do not include harmonic extractors. The effectiveness of the proposed method is verified through simulations and practical experiments. Full article
(This article belongs to the Special Issue High Power Electric Traction Systems)
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