@article{islam_husain_ahmed_sathyan_2020, title={Asymmetric Bar Winding for High-Speed Traction Electric Machines}, volume={6}, ISSN={["2332-7782"]}, DOI={10.1109/TTE.2019.2962329}, abstractNote={A new asymmetric bar winding concept along with the analysis and benefits for high-speed traction electric machines is presented. The objective is to reduce the ac losses, especially at high speeds, utilizing optimized and asymmetric conductor heights within a slot for bar-wound stators. Detailed winding diagram, height optimization, ac loss analysis, and thermal performance are presented for both symmetric, i.e., conventional, and asymmetric bar windings. The proposed idea is validated using the closed-form analytical equation and 2-D time-stepped finite-element analysis (FEA). A substantial reduction of ac losses and improvement in continuous power over the wide operation range is achieved as demonstrated for a 12-pole, 100-kW high-speed (15 000 r/min) PM traction machine. Thermal performance analysis using forced liquid cooling is also included. The design and analysis methodology is presented to support high-speed traction electric machine designers meet the ever-increasing demand on efficiency and performance with bar-type windings.}, number={1}, journal={IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION}, author={Islam, Md Sariful and Husain, Iqbal and Ahmed, Adeeb and Sathyan, Anand}, year={2020}, month={Mar}, pages={3–15} }
 @article{ahmed_husain_2018, title={Power Factor Improvement of a Transverse Flux Machine With High Torque Density}, volume={54}, ISSN={["1939-9367"]}, DOI={10.1109/TIA.2018.2840487}, abstractNote={Design of a permanent magnet transverse flux machine optimized for high torque density and high power factor is presented. The optimization process focuses on performance enhancement through improvement of power factor without sacrificing torque density. Simple magnetostatic simulation based method is proposed for the optimization process. Magnetic couplings among axially separated phases are also discussed in the article. Experimental results demonstrating the correlation of measured inductances with that of simulation results are provided.}, number={5}, journal={IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS}, author={Ahmed, Adeeb and Husain, Iqbal}, year={2018}, pages={4297–4305} }
 @article{badawy_arafat_ahmed_anwar_sozer_yi_de_abreu-garcia_2016, title={Design and implementation of a 75-kW mobile charging system for electric vehicles}, volume={52}, number={1}, journal={IEEE Transactions on Industry Applications}, author={Badawy, M. O. and Arafat, M. N. and Ahmed, A. and Anwar, S. and Sozer, Y. and Yi, P. and De and Abreu-Garcia, J. A.}, year={2016}, pages={369–377} }
 @inproceedings{wan_ahmed_husain_muljadi_2015, title={A novel transverse flux machine for vehicle traction aplications}, DOI={10.1109/pesgm.2015.7286494}, abstractNote={A novel transverse flux machine topology for electric vehicle traction application using ferrite magnets is presented in this paper. The proposed transverse flux topology utilizes novel magnet arrangements in the rotor that are similar to Halbach-array to boost flux linkage; on the stator side, cores are alternately arranged around a pair of ring windings in each phase to make use of the entire rotor flux that eliminates end windings. Analytical design considerations and finite element methods are used for an optimized design of a scooter in-wheel motor. Simulation results from Finite Element Analysis (FEA) show the motor achieved comparable torque density to conventional rare-earth permanent magnet machines. This machine is a viable candidate for direct drive applications with low cost and high torque density.}, booktitle={2015 ieee power & energy society general meeting}, author={Wan, Z. and Ahmed, A. and Husain, I. and Muljadi, E.}, year={2015} }
 @inproceedings{kabir_ahmed_husain_2015, title={Axial flux segmental rotor flux-switching synchronous motor}, DOI={10.1109/ecce.2015.7309963}, abstractNote={A novel three-phase, concentrated winding, axial flux, segmental rotor, flux-switching synchronous motor is presented. The proposed topology has rotor segments made of only iron laminations and operates with flux-switching principle. Compared to existing axial flux permanent magnet (AFPM) topologies, the proposed machine contains reduced amount of permanent magnets located only in its stator. This approach makes the assembly easier and reduce the cost compared to conventional AFPM. Moreover, the proposed topologies have higher torque density and torque-to-weight ratio compared to reported axial flux SRMs (AFSRMs). Detailed design and operation of the proposed machine is presented; the performance of the machine is evaluated for an in-wheel traction application.}, booktitle={2015 ieee energy conversion congress and exposition (ecce)}, author={Kabir, M. A. and Ahmed, A. and Husain, I.}, year={2015}, pages={2148–2152} }
 @article{khan_ahmed_husain_sozer_badawy_2015, title={Performance Analysis of Bidirectional DC-DC Converters for Electric Vehicles}, volume={51}, ISSN={["1939-9367"]}, DOI={10.1109/tia.2015.2388862}, abstractNote={This paper presents the performance analysis and comparison of two types of bidirectional dc-dc converters-cascaded buck-boost capacitor in the middle and cascaded buck-boost inductor in the middle for use in plug-in electric and hybrid electric vehicles. The comparison of the two converters is based on device requirements, rating of switches and components, control strategy, and performance. Each of the converter topologies has some advantages over the other in certain aspects. Efficiency analysis has been carried out for specific scenarios in vehicle applications. The simulation and experimental results are provided for both converter types.}, number={4}, journal={IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS}, author={Khan, Mehnaz Akhter and Ahmed, Adeeb and Husain, Iqbal and Sozer, Yilmaz and Badawy, Mohamed}, year={2015}, pages={3442–3452} }
 @inproceedings{ahmed_wan_husain_2015, title={Permanent magnet transverse flux machine with overlapping stator poles}, DOI={10.1109/ecce.2015.7309770}, abstractNote={A Transverse Flux Machine (TFM) topology with ring winding configuration is proposed. A novel approach for stator pole configuration is presented that ensures lower leakage between adjacent poles. The unique stator pole configuration permits an overlapping region between adjacent stator poles resulting in a significant improvement in space utilization that helps attain higher torque-to-volume ratio. In addition, the innovative pole design reduces the end winding length which helps reduce the copper mass. Simulation results are presented based on 3D Finite Element Analysis (FEA). Significant performance improvement was achieved compared to similar transverse flux machines.}, booktitle={2015 ieee energy conversion congress and exposition (ecce)}, author={Ahmed, A. and Wan, Z. and Husain, I.}, year={2015}, pages={791–798} }