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An Unbalanced Capacitor Voltage Buck Converter With Wide Soft Switching Range (2023)
Journal Article
Chen, Q., Klumpner, C., & Ahmed, M. R. (2023). An Unbalanced Capacitor Voltage Buck Converter With Wide Soft Switching Range. IEEE Transactions on Industrial Electronics, https://doi.org/10.1109/tie.2023.3314856

DC–DC converters using soft switching technology have gained popularity in several industrial applications. Nevertheless, a wider soft switching range and a simpler structure are the holy grail for these converters. In this article, an innovative unb... Read More about An Unbalanced Capacitor Voltage Buck Converter With Wide Soft Switching Range.

Impact of Grid Unbalances on Electric Vehicle Chargers (2023)
Journal Article
Alwahaibi, S., Wheeler, P., Rivera, M., & Ahmed, M. R. (2023). Impact of Grid Unbalances on Electric Vehicle Chargers. Energies, 16(17), Article 6201. https://doi.org/10.3390/en16176201

There is a global trend to reduce emissions from cars through the adoption of other alternatives, such as electric vehicles (EVs). The increasing popularity of EVs has led to a growing demand for electric vehicle chargers. EV chargers are essential f... Read More about Impact of Grid Unbalances on Electric Vehicle Chargers.

An Isolated Multiport DC–DC Converter for Integrated Electric Vehicle On-Board Charger (2023)
Journal Article
Kougioulis, I., Pal, A., Wheeler, P., & Ahmed, M. R. (2023). An Isolated Multiport DC–DC Converter for Integrated Electric Vehicle On-Board Charger. IEEE Journal of Emerging and Selected Topics in Power Electronics, 11(4), 4178-4198. https://doi.org/10.1109/jestpe.2023.3276048

This paper proposes an integrated on-board charger (IOBC) for Electric Vehicles (EVs) based on an isolated three-port DC-DC converter. The proposed architecture integrates the on-board charger (OBC) and the auxiliary power module (APM) in a single mu... Read More about An Isolated Multiport DC–DC Converter for Integrated Electric Vehicle On-Board Charger.

An Optimisation Tool for Hybrid-Electric Aircraft Propulsion Systems (2023)
Conference Proceeding
Walmsley, R., Ahmed, R., Klumpner, C., & Saleh, B. M. (2023). An Optimisation Tool for Hybrid-Electric Aircraft Propulsion Systems. In 2023 IEEE International Electric Machines & Drives Conference (IEMDC). https://doi.org/10.1109/iemdc55163.2023.10238919

The requirement for reductions in CO 2 , NO X and noise emissions from aviation have come under great assiduity. The use of electric and hybrid-electric propulsion systems within aircraft offer potential performance and efficiency improvements, throu... Read More about An Optimisation Tool for Hybrid-Electric Aircraft Propulsion Systems.

A Comprehensive Review of Machine-Integrated Electric Vehicle Chargers (2022)
Journal Article
Mustafa, U., Ahmed, R., Watson, A., Wheeler, P., Ahmed, N., & Dahele, P. (2023). A Comprehensive Review of Machine-Integrated Electric Vehicle Chargers. Energies, 16(1), Article 129. https://doi.org/10.3390/en16010129

Electric Vehicles are becoming increasingly popular due to their environment friendly operation. As the demand for electric vehicles increases, it has become quite important to explore their charging strategies. Since charging and traction do not nor... Read More about A Comprehensive Review of Machine-Integrated Electric Vehicle Chargers.

A Critical Review on Charging Technologies of Electric Vehicles (2022)
Journal Article
Shahjalal, M., Shams, T., Tasnim, M. N., Ahmed, M. R., Ahsan, M., & Haider, J. (2022). A Critical Review on Charging Technologies of Electric Vehicles. Energies, 15(21), Article 8239. https://doi.org/10.3390/en15218239

The enormous number of automobiles across the world has caused a significant increase in emissions of greenhouse gases, which pose a grave and mounting threat to modern life by escalating global warming and polluting air quality. These adverse effect... Read More about A Critical Review on Charging Technologies of Electric Vehicles.

A review on second-life of Li-ion batteries: prospects, challenges, and issues (2021)
Journal Article
Shahjalal, M., Roy, P. K., Shams, T., Fly, A., Chowdhury, J. I., Ahmed, M. R., & Liu, K. (2022). A review on second-life of Li-ion batteries: prospects, challenges, and issues. Energy, 241, Article 122881. https://doi.org/10.1016/j.energy.2021.122881

High energy density has made Li-ion battery become a reliable energy storage technology for transport-grid applications. Safely disposing batteries that below 80% of their nominal capacity is a matter of great concern to reduce overall carbon footpri... Read More about A review on second-life of Li-ion batteries: prospects, challenges, and issues.

A comprehensive review on system architecture and international standards for electric vehicle charging stations (2021)
Journal Article
Rajendran, G., Vaithilingam, C. A., Misron, N., Naidu, K., & Ahmed, M. R. (2021). A comprehensive review on system architecture and international standards for electric vehicle charging stations. Journal of Energy Storage, 42, Article 103099. https://doi.org/10.1016/j.est.2021.103099

Electric Vehicles (EVs) are rapidly becoming an important facet in the drive for attaining sustainable energy goals. However, EV sales still constitute only a small proportion of vehicles in most countries. The expansion of DC fast-charging network w... Read More about A comprehensive review on system architecture and international standards for electric vehicle charging stations.

A review of thermal management for Li-ion batteries: Prospects, challenges, and issues (2021)
Journal Article
Shahjalal, M., Shams, T., Islam, M. E., Alam, W., Modak, M., Hossain, S. B., …Iqbal, A. (2021). A review of thermal management for Li-ion batteries: Prospects, challenges, and issues. Journal of Energy Storage, 39, Article 102518. https://doi.org/10.1016/j.est.2021.102518

Li-ion batteries are essential component in the current generation of electric vehicles. However, further pushing electric vehicles are concerned with battery life. Since the temperature dictates battery lifetime, it is crucial to manage the heat and... Read More about A review of thermal management for Li-ion batteries: Prospects, challenges, and issues.

Voltage Oriented Controller based Vienna Rectifier for Electric Vehicle Charging Stations (2021)
Journal Article
Rajendran, G., Vaithilingam, C. A., Misron, N., Naidu, K., & Ahmed, M. R. (2021). Voltage Oriented Controller based Vienna Rectifier for Electric Vehicle Charging Stations. IEEE Access, 9, 50798-50809. https://doi.org/10.1109/ACCESS.2021.3068653

Vienna rectifiers have gained popularity in recent years for AC to DC power conversion for many industrial applications such as welding power supplies, data centers, telecommunication power sources, aircraft systems, and electric vehicle charging sta... Read More about Voltage Oriented Controller based Vienna Rectifier for Electric Vehicle Charging Stations.

An Analysis of the Thermal Interaction Between Components in Power Converter Applications (2020)
Journal Article
Shahjalal, M., Ahmed, M. R., Lu, H., Bailey, C., & Forsyth, A. J. (2020). An Analysis of the Thermal Interaction Between Components in Power Converter Applications. IEEE Transactions on Power Electronics, 35(9), 9082-9094. https://doi.org/10.1109/tpel.2020.2969350

Accurately predicting the temperature of semiconductor devices is very important in the initial design of the power electronics converter. RC thermal models derived from the well-known methods have some ability to predict the temperature. However, th... Read More about An Analysis of the Thermal Interaction Between Components in Power Converter Applications.

A Single- and Three-Phase Grid Compatible Converter for Electric Vehicle On-Board Chargers (2019)
Journal Article
Zhao, H., Shen, Y., Ying, W., Ghosh, S. S., Ahmed, M. R., & Long, T. (2020). A Single- and Three-Phase Grid Compatible Converter for Electric Vehicle On-Board Chargers. IEEE Transactions on Power Electronics, 35(7), 7545-7562. https://doi.org/10.1109/tpel.2019.2956653

This article proposes a voltage-source converter for an on-board electric vehicle charger, which is compatible with both the single- and three-phase (1-? and 3-?) grids. The classic 3-? active ac-dc rectifier circuit is used for both the 1-? and 3-?... Read More about A Single- and Three-Phase Grid Compatible Converter for Electric Vehicle On-Board Chargers.

Soft-switching operation of the dual-interleaved boost converter over all duty ratios (2017)
Journal Article
Ahmed, M. R., Todd, R., & Forsyth, A. J. (2017). Soft-switching operation of the dual-interleaved boost converter over all duty ratios. IET Power Electronics, 10(11), 1250-1258. https://doi.org/10.1049/iet-pel.2016.0861

To extend the operating range of the snubber assisted zero-voltage and zero-current transition dual-interleaved boost converter beyond its inherent soft-switching limit of D = 0.5, a resonant pulse transformer is proposed instead of the resonant indu... Read More about Soft-switching operation of the dual-interleaved boost converter over all duty ratios.

Predicting SiC MOSFET Behavior Under Hard-Switching, Soft-Switching, and False Turn-On Conditions (2017)
Journal Article
Ahmed, M. R., Todd, R., & Forsyth, A. J. (2017). Predicting SiC MOSFET Behavior Under Hard-Switching, Soft-Switching, and False Turn-On Conditions. IEEE Transactions on Industrial Electronics, 64(11), 9001-9011. https://doi.org/10.1109/tie.2017.2721882

Circuit-level analytical models for hard-switching, soft-switching, and dv/dt-induced false turn on of SiC MOSFETs and their experimental validation are described. The models include the high-frequency parasitic components in the circuit and enable f... Read More about Predicting SiC MOSFET Behavior Under Hard-Switching, Soft-Switching, and False Turn-On Conditions.

Analysis of SiC MOSFETs under hard and soft-switching (2015)
Conference Proceeding
Ahmed, M. R., Todd, R., & Forsyth, A. J. (2015). Analysis of SiC MOSFETs under hard and soft-switching. In 2015 IEEE Energy Conversion Congress and Exposition (ECCE). https://doi.org/10.1109/ecce.2015.7309974

Analytical models for hard-switching and soft-switching SiC MOSFETs and their experimental validation are described in this paper. The models include the high frequency parasitic components in the circuit and enable very fast, accurate simulation of... Read More about Analysis of SiC MOSFETs under hard and soft-switching.