Inventions in Power Trains for Electrical Vehicles

A special issue of Inventions (ISSN 2411-5134). This special issue belongs to the section "Inventions and Innovation in Advanced Manufacturing".

Deadline for manuscript submissions: 30 September 2024 | Viewed by 4258

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Guest Editor
Department of System and Naval Mechatronic Engineering, National Cheng Kung University, No. 1, University Road, Tainan City 701, Taiwan
Interests: heat transfer enhancement; gas turbine blade cooling; electronic cooling; thermosyphon and heat pipe; heat convection of reciprocating and pulsating flows; cooling of electric motor
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Co-Guest Editor
Department of Electrical Engineering, National Cheng Kung University, Tainan 701, Taiwan
Interests: electric machines; mtor dives; electric vehicles; renewable energy

Special Issue Information

Dear Colleagues,

Energy conversion from sustainable energy into electricity is an affirmed trend for reducing the consumption of fossil fuel. The ever mounting demand for a vehicle powered by electricity appears as a right track for moderating the climate change caused by global warming as a result of greenhouse gas emission from a heat engine. Inventions in power trains to achieve effective and efficient power conversions are essential to popularize the utilization of an electrical vehicle. This Special Issue is dedicated to the advancements in theoretical, experimental, and numerical studies of energy management for an electrical power train, electric motor, cooling technology, battery, fuel cell, rotor dynamics, magnetic (non-contact) power transmission, control, drivers, and the relevant AI applications. Papers addressing the latest developments of interdisciplinary study for improving the overall performance of a power train for electrical vehicle are also of interest.

Prof. Dr. Shyy Woei Chang
Prof. Dr. Min-Fu Hsieh
Guest Editors

Manuscript Submission Information

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Keywords

  • Power train
  • Electrical vehicle
  • Electric motor
  • Cooling technology
  • Rotor dynamics
  • Power transmission
  • Battery
  • Control
  • Fuel cell
  • Energy management
  • Driver
  • AI
  • Electromagnetics

Published Papers (2 papers)

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Research

15 pages, 5148 KiB  
Article
Modeling and Experimental Validation of Broad Input-Output Range Three-Voltage-Level Rectifier
by Yarden Oren, Eliav Dahan, Aaron Shmaryahu, Yishai Kellerman, Moshe Sitbon, Shlomo Yaakov Gadelovits, Dmitry Baimel and Ilan Aharon
Inventions 2024, 9(2), 37; https://doi.org/10.3390/inventions9020037 - 29 Mar 2024
Viewed by 787
Abstract
A new type of single–conversion–step wide–input–range versatile step–up/down three–voltage–level power–factor correction stage is presented in this manuscript. The rectifier can operate both in continuous–conduction mode and discontinuous–conduction mode. First, the rectifier’s principle of operation is described, and then the innovative rectifier is analyzed [...] Read more.
A new type of single–conversion–step wide–input–range versatile step–up/down three–voltage–level power–factor correction stage is presented in this manuscript. The rectifier can operate both in continuous–conduction mode and discontinuous–conduction mode. First, the rectifier’s principle of operation is described, and then the innovative rectifier is analyzed in continuous and discontinuous–conduction modes. After, an average model for the innovative rectifier is developed. Lastly, the proposed theory is experimentally validated using a multiplier–less dual–control–loop mode at discontinuous–conduction modes. It is shown that although no multiplier is used in the control circuitry, the power factor is near unity. It is revealed that the rectifier can swing the output voltage from 50 V to 900 V while the input voltage is 230 Vrms. Although the rectifier output has a split DC bus with three voltage levels, the required control effort is low, and the output voltage is balanced. The innovative topology suits any standard power–factor correction rectifier application, dual–stage low–voltage power supply, and three–level voltage supplement for low–harmonic inverters. Since the rectifier’s output–voltage swing is extremely wide, energy storage systems and electric vehicle batteries are suitable applications. Full article
(This article belongs to the Special Issue Inventions in Power Trains for Electrical Vehicles)
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25 pages, 2937 KiB  
Article
Efficiency Improvement of a Cascaded Buck and Boost Converter for Fuel Cell Hybrid Vehicles with Overlapping Input and Output Voltages
by Noass Kunstbergs, Hartmut Hinz, Nigel Schofield and Dennis Roll
Inventions 2022, 7(3), 74; https://doi.org/10.3390/inventions7030074 - 31 Aug 2022
Cited by 1 | Viewed by 2745
Abstract
Fuel cell hybrid vehicles represent an alternative to battery electric vehicles and will gain importance in the future as they do not need large battery capacities and thus require less critical raw materials. Depending on the electric architecture, the voltage of the fuel [...] Read more.
Fuel cell hybrid vehicles represent an alternative to battery electric vehicles and will gain importance in the future as they do not need large battery capacities and thus require less critical raw materials. Depending on the electric architecture, the voltage of the fuel cell stack and traction battery may overlap. Accordingly, it is necessary to use a bidirectional DC–DC converter that connects the battery to the DC bus, which supports overlapping input and output voltages. Furthermore, these converters should be non-isolating in terms of compact design. Concerning complexity and controllability, the bidirectional cascaded buck and boost converter is preferable and is the subject of this study. Published literature presents the bidirectional cascaded buck and boost converter with high losses for overlapping input and output voltages, introducing two methods for this operation mode. The method selected for this study, namely buck + boost, uses two switches, whereby one switch has a fixed duty cycle. However, there is no appropriate investigation to determine the impact of this fixed duty cycle on converter efficiency to date. Furthermore, efficiency improvement is possible by switching frequency modulation, but current literature does not address this modulation method for overlapping input and output voltages. Therefore, this paper investigates a non-isolated hard-switched bidirectional cascaded buck and boost converter for fuel cell hybrid vehicles operating with up to 19.8 kW. The study focuses on determining the optimum fixed duty cycle and efficiency optimisation through a novel critical conduction mode with adapted switching frequency by utilising the load-dependent inductance of the inductor with powder cores. Measurements with an experimental setup validate the proposed modulation method with Si-IGBT half-bridge modules. The results demonstrate that a loss reduction of 39% is possible with switching frequency modulation and the optimum duty cycle compared to fixed switching frequency. As a result, the converter achieves high efficiencies of up to 99% and low device junction temperatures. Full article
(This article belongs to the Special Issue Inventions in Power Trains for Electrical Vehicles)
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