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WEVJ
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Power Electronics Subsystems
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Power Electronics Subsystems

A special issue of World Electric Vehicle Journal (ISSN 2032-6653).

Deadline for manuscript submissions: closed (21 September 2019) | Viewed by 16171

Special Issue Editors

Prof. Dr. Nobukazu Hoshi

E-Mail Website
Guest Editor
Department of Electrical Engineering, Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba-ken 278-8510, Japan
Interests: Inverter, DC/DC converter; Soft switching; Motor drives; Switched reluctance motor
Dr. Kimimori Hamada

E-Mail Website
Guest Editor
Toyota Motor Corporation, Japan
Interests: Semiconductor devices; IGBT; SiC; Wide Bandgap; Power module; Electrified vehicles

Special Issue Information

Dear Colleagues,

The automotive industry is developing a range of electrically-powered, environmentally friendly vehicles such as hybrid vehicles (HV), plug-in hybrid vehicles (PHV), full electric vehicles (EV), and fuel cell vehicles (FCV) to help reduce tailpipe CO2 emissions and prevent air pollution. This is driving vehicle electrified power proportion system development and research activities both in academia and industry. However, in order to enhance the full performance and cost reduction of such electrified powered vehicles, we are in no doubt that the power electronics researchers and engineers who are developing high performance power electrics subsystems will have to contribute to expansion of the whole vehicle performance and usability for customers, simultaneously. The research fields and topics for this Special Issue include all power electronics-related technologies other than vehicle proportion systems. We define a power electronics system as a system handling electric power of more than approximately 1 kilo watt. We propose that this Special Issue will cover all areas of power electronics subsystems and their components, for example, systems such as charging systems, high voltage battery systems, subsystems with motor(s) and electric power conversion systems and components such as power semiconductor devices, power modules, passive components, tools, sensors, connecters, cables, relays, circuits topologies, algorithms and software. Vehicle type is not limited, namely this special issue accepts subsystems for both conventional vehicles and electrified vehicles. And furthermore, system voltage is not also limited, namely all 12V, 48V and HV are welcome.

Prof. Nobukazu Hoshi
Dr. Kimimori Hamada
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. World Electric Vehicle Journal is an international peer-reviewed open access monthly 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 1400 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

  • Power electronics
  • Electrified vehicles
  • High voltage battery
  • Charging system
  • inverter
  • DCDC converter
  • 48V system
  • Power electronics component
  • Power module
  • Passive component
  • Power semiconductor devices
  • SiC
  • GaN
  • Algorithm

Published Papers (4 papers)

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Research

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15 pages, 3593 KiB  
Article
Experimental Verification of Fault Tolerant Operation Focusing on DC-Bus Battery Failure in Dual Inverter Motor Drive
by Yoshiaki Oto, Toshihiko Noguchi and Melinda Badriatul Fauziah
World Electr. Veh. J. 2019, 10(4), 65; https://doi.org/10.3390/wevj10040065 - 18 Oct 2019
Cited by 2 | Viewed by 2924
Abstract
Recently, a dual inverter motor drive feeding an open-end winding permanent magnet (PM) motor has been studied, aiming for the improvement of total efficiency and a fault tolerant function of hybrid and electric vehicles. The authors have studied the fault tolerant operation of [...] Read more.
Recently, a dual inverter motor drive feeding an open-end winding permanent magnet (PM) motor has been studied, aiming for the improvement of total efficiency and a fault tolerant function of hybrid and electric vehicles. The authors have studied the fault tolerant operation of the DC-bus battery, where the failed inverter is operated only with a capacitor across the DC-bus and a space vector modulation (SVM) is employed to regulate the capacitor voltage. In our previous research, the SVM techniques for the fault tolerant operation in a low-modulation-index have been proposed. However, it was difficult to have fault tolerance in a high-modulation-index case. The voltage margin in the fault situation is limited because the failed inverter is operated with the capacitor. In this paper, the SVM technique to achieve the fault tolerant operation in the high-modulation-index state is investigated. The novel point of this paper is that the proposed technique introduces a field-weakening control in order to reduce the command voltage vector within the controllable voltage region. The proposed technique was verified through experimental tests and its operational characteristics were compared with the normal operation, from the viewpoints of the total harmonic distortion (THD) and the efficiencies of the inverters and the motor. Full article
(This article belongs to the Special Issue Power Electronics Subsystems)
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19 pages, 4474 KiB  
Article
Design and Experimental Verification of Voltage Measurement Circuits Based on Linear Optocouplers with Galvanic Isolation for Battery Management Systems
by Borislav Dimitrov, Gordana Collier and Andrew Cruden
World Electr. Veh. J. 2019, 10(4), 59; https://doi.org/10.3390/wevj10040059 - 23 Sep 2019
Cited by 4 | Viewed by 6514
Abstract
A battery management system (BMS) design, based on linear optocouplers for Lithium-ion battery cells for automotive and stationary applications is proposed. The critical parts of a BMS are the input voltages and currents measurement circuits. In this design, they include linear optocouplers for [...] Read more.
A battery management system (BMS) design, based on linear optocouplers for Lithium-ion battery cells for automotive and stationary applications is proposed. The critical parts of a BMS are the input voltages and currents measurement circuits. In this design, they include linear optocouplers for galvanic isolation between the battery pack and the BMS. Optocouplers based on AlGaAs light emitted diodes (LED) and PIN photodiode with external operational amplifiers are used. The design features linear characteristics, to ensure the accuracy of the measurements. The suggested approach is based on graphical data digitalizing, which gives the precise values for the most sensitive parameters: photocurrent, normalized and transferred servo gain and helps the calculation procedure to be automated with MATLAB scripts. Several mathematical methods in the analysis are used in order for the necessary equations to be derived. The results are experimentally verified with prototypes. Full article
(This article belongs to the Special Issue Power Electronics Subsystems)
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12 pages, 4479 KiB  
Article
A Consideration on Maximum Efficiency of Resonant Circuit of Inductive Power Transfer System with Soft-Switching Operation
by Ryosuke Ota, Dannisworo Sudarmo Nugroho and Nobukazu Hoshi
World Electr. Veh. J. 2019, 10(3), 54; https://doi.org/10.3390/wevj10030054 - 11 Sep 2019
Cited by 8 | Viewed by 3052
Abstract
By using bi-directional inductive power transfer (IPT) systems as battery chargers for electric vehicles (EVs), battery charging operations become convenient and safe. However, IPT systems have problems such as occurrences of much electromagnetic noise and power loss because the converters of IPT systems [...] Read more.
By using bi-directional inductive power transfer (IPT) systems as battery chargers for electric vehicles (EVs), battery charging operations become convenient and safe. However, IPT systems have problems such as occurrences of much electromagnetic noise and power loss because the converters of IPT systems are driven in high frequency by tens of kHz. To solve these problems, there is a case where the soft-switching technique needs to be applied to the converters of IPT systems. However, in soft-switching operation, the power factor of the resonant circuit becomes lower, resulting in a lower resonant circuit efficiency. In previous works, when the soft-switching technique was applied to the converters, the resonant circuit had not always been able to be operated with high efficiency because the influence caused by soft-switching operation had not been considered. For this reason, there was a case where the efficiency of the overall system with soft-switching operation became lower than the efficiency in hard-switching operation. Therefore, in this paper, the influence on the efficiency of the resonant circuit caused by the soft-switching operation is clarified by the theoretical analysis and experiments; then, the guideline for improving the efficiency of IPT systems is shown. As a result, in the experiments, it could be understood that the efficiency of the overall system with soft-switching operation becomes higher than the efficiency in hard-switching operation when the operating point of the resonant circuit was close to the requirement guideline, which is shown by using the primary-side voltage and the secondary-side voltage of the resonant circuit. Therefore, it is suggested that the efficiency of IPT systems could be improved by properly regulating the primary-side direct current (DC) voltage. Full article
(This article belongs to the Special Issue Power Electronics Subsystems)
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9 pages, 1862 KiB  
Technical Note
EV Range Extender in a Two-Battery HEECS Chopper-Based Powertrain
by Ayataro Tamura, Takayuki Ishibashi and Atsuo Kawamura
World Electr. Veh. J. 2019, 10(2), 19; https://doi.org/10.3390/wevj10020019 - 19 Apr 2019
Cited by 1 | Viewed by 3125
Abstract
This paper first presents a new powertrain based on a two-battery High-Efficiency Energy Conversion System (HEECS) chopper that is suitable for electric vehicles (EVs). The HEECS chopper is based on the principle of a partial power conversion circuit, and the overall efficiency is [...] Read more.
This paper first presents a new powertrain based on a two-battery High-Efficiency Energy Conversion System (HEECS) chopper that is suitable for electric vehicles (EVs). The HEECS chopper is based on the principle of a partial power conversion circuit, and the overall efficiency is over 99% in a wide load range. The efficiency of this powertrain was measured in the steady state by two types of powertrains, a non-chopper powertrain and an HEECS chopper-based powertrain, using a motor test bench. On the basis of these data, several driving tests, such as the Worldwide-harmonized Light vehicles Test Cycle (WLTC), were simulated, and four driving cycle patterns were included. A 6.4% reduction in energy consumption was observed in WLTC low mode compared with the energy consumed by the non-chopper powertrain in the experiments. Thus, the HEECS chopper-based powertrain is more suitable for low-speed driving ranges than high-speed ranges. Full article
(This article belongs to the Special Issue Power Electronics Subsystems)
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