@article{adelabu_tomhon_kabir_nantogma_abdulmojeed_mandzhieva_ettedgui_swenson_krishna_theis_et al._2021, title={Order-Unity C-13 Nuclear Polarization of [1-C-13]Pyruvate in Seconds and the Interplay of Water and SABRE Enhancement}, volume={11}, ISSN={["1439-7641"]}, url={https://doi.org/10.1002/cphc.202100839}, DOI={10.1002/cphc.202100839}, abstractNote={Abstract}, number={2}, journal={CHEMPHYSCHEM}, publisher={Wiley}, author={Adelabu, Isaiah and TomHon, Patrick and Kabir, Mohammad S. H. and Nantogma, Shiraz and Abdulmojeed, Mustapha and Mandzhieva, Iuliia and Ettedgui, Jessica and Swenson, Rolf E. and Krishna, Murali C. and Theis, Thomas and et al.}, year={2021}, month={Dec} }
 @article{mehta_kabir_pramod_husain_2021, title={Segmented Rotor Mutually Coupled Switched Reluctance Machine for Low Torque Ripple Applications}, volume={57}, ISSN={["1939-9367"]}, DOI={10.1109/TIA.2021.3073384}, abstractNote={Mutually coupled switched reluctance motors (MCSRMs) are alternatives in the family of reluctance machines that can overcome switched reluctance motor's (SRM's) system-level integration and control challenges by utilizing standard three-phase voltage source inverters. In this article, a novel segmented-rotor, fractional-slot, tooth-wound MCSRM with notched rotor design is presented, which has very low torque ripple compared to other machine types in the SRM family. The torque ripple is reduced to 3.6% without utilizing any current profiling techniques or torque sharing functions. The ripple minimization is achieved primarily through rotor segment shaping, which has a strong influence on stator flux densities, flux linkages, and torque harmonics. The design strategy, along with the optimization details, is presented for a 120 W, 12 slot-8 pole MCSRM. The designed MCSRM is prototyped for experimental verification and validation of the finite element analysis results and design methodology.}, number={4}, journal={IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS}, author={Mehta, Siddharth and Kabir, Md Ashfanoor and Pramod, Prerit and Husain, Iqbal}, year={2021}, pages={3582–3594} }
 @article{mehta_pramod_husain_kabir_2021, title={Small-Signal Modeling of Mutually Coupled Switched Reluctance Motor}, volume={57}, ISSN={["1939-9367"]}, DOI={10.1109/TIA.2020.3030873}, abstractNote={A small-signal model based on the net flux method is developed for mutually coupled switched reluctance machines (MCSRMs) to facilitate the design and analysis of the current controller for the drive. The underlying methodology of using net flux allows MCSRM modeling on a per-phase basis which reduces the time involved in characterizing the motor and the number of machine model parameters. A comprehensive theory of modeling the machine and extracting the machine parameters with analytical derivations is provided. Furthermore, a complete design procedure and analysis for a proportional-integrator controller is presented. The derived MCSRM small-signal model is useful to evaluate the controller's current tracking performance, disturbance rejection capability, and response features over a wide speed range. Simulation analysis and experimental results for a 3 phase, 150 W, full-pitched MCSRM drive system are provided both for small-signal model validation and current controller performance evaluation.}, number={1}, journal={IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS}, author={Mehta, Siddharth and Pramod, Prerit and Husain, Iqbal and Kabir, Md Ashfanoor}, year={2021}, month={Jan}, pages={259–271} }
 @article{islam_kabir_mikail_husain_2020, title={A Systematic Approach for Stator MMF Harmonic Elimination Using Three-Layer Fractional Slot Winding}, volume={56}, ISSN={["1939-9367"]}, DOI={10.1109/TIA.2020.2984195}, abstractNote={A systematic approach based on a novel space-shifted three-layer winding (SSTLW) to eliminate both the sub- and superharmonics of fractional slot concentrated winding ac machines is presented. In this proposed three-layer fractional slot winding, the number of turns in one layer and the relative positions of other two layers are optimized to cancel subharmonics. The cancellation of superharmonics is achieved through series connection of two SSTLWs through effective doubling of the number of slots. The cancellation of the dominant sub- and superharmonics using this approach leads to reducing the total harmonic distortion, torque ripple, PM eddy current loss, and rotor core loss, while simultaneously improving power factor and saliency ratio. The proposed design methodology and ensuring improvements have been validated through finite element analysis for the widely used 12-slot/10-pole and 18-slot/14-pole permanent magnet synchronous machine (PMSM) configurations. A prototype three-layer winding is built for a 10-pole PMSM to validate the simulation results experimentally.}, number={4}, journal={IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS}, author={Islam, Md Sariful and Kabir, Md Ashfanoor and Mikail, Rajib and Husain, Iqbal}, year={2020}, pages={3516–3525} }
 @article{mehta_kabir_husain_pramod_2020, title={Modeling of Mutually Coupled Switched Reluctance Motors Based on Net Flux Method}, volume={56}, ISSN={["1939-9367"]}, DOI={10.1109/TIA.2020.2968834}, abstractNote={Modeling and accurate estimation of mutual flux in switched reluctance motors are complex due to interphase flux interactions, magnetic saturation, and harmonics. The mutual flux contributes significantly toward torque production of mutually coupled switched reluctance motors (MCSRMs); therefore, their accurate modeling directly influences the control design. In this article, a net-flux-based machine model is proposed to model MCSRMs. The model utilizes dual-phase excitation and multiphase excitation methods to generate the flux lookup tables from the finite-element model of the MCSRM. The modeling process is simple, as it does not require the segregation of the self- and mutual flux components, and machine performance can be predicted accurately using the net flux. The proposed modeling method is validated by implementing it for a fully pitched and concentrated-wound MCSRM and evaluating accuracy against the finite-element method. Details of the developed model are presented along with its comparison with existing methods. A prototype of a fully pitched MCSRM has been built, and the model is validated experimentally. Results show that the proposed model has excellent accuracy even under saturated operating conditions.}, number={3}, journal={IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS}, author={Mehta, Siddharth and Kabir, Md Ashfanoor and Husain, Iqbal and Pramod, Prerit}, year={2020}, pages={2451–2461} }
 @article{islam_kabir_mikail_husain_2020, title={Space-Shifted Wye-Delta Winding to Minimize Space Harmonics of Fractional-Slot Winding}, volume={56}, ISSN={["1939-9367"]}, DOI={10.1109/TIA.2020.2975766}, abstractNote={A space-shifted wye–delta winding for fractional-slot concentrated winding (FSCW) is proposed that can simultaneously cancel both sub- and super-order harmonics of its stator MMF. The new winding concept proposes two sets of three-phase windings by doubling the number of stator slots connected in the wye–delta configuration. These two winding sets are shifted in space with respect to each other and are connected in series. The wye–delta configuration eliminates subharmonics and enhances the torque-producing component, whereas their relative shifting angle eliminates the dominant higher order harmonics to provide a cleaner and enhanced MMF spectrum. In FSCW motors, dominant space harmonics other than the torque-producing component give rise to undesirable losses in the magnet and rotor core. The efficacy of the proposed method is demonstrated through its stator MMF, harmonic spectrum, and motor performance using finite-element analysis. The application of the proposed winding to a permanent magnet (PM) machine showed dominant sub- and super-order harmonics cancellation, total harmonic distortion reduction, and magnetic loss reduction along with torque density and power factor improvements. A prototype PM machine is built, and the performance of the proposed concept is verified experimentally.}, number={3}, journal={IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS}, author={Islam, M. D. Sariful and Kabir, Md Ashfanoor and Mikail, Rajib and Husain, Iqbal}, year={2020}, pages={2520–2530} }
 @article{kabir_jaffar_wan_husain_2019, title={Design, Optimization, and Experimental Evaluation of Multilayer AC Winding for Induction Machine}, volume={55}, ISSN={["1939-9367"]}, DOI={10.1109/TIA.2019.2910775}, abstractNote={This paper presents the design characterization, optimization, and experimental validation of a multilayer ac winding that provides a high quality rotating MMF with reduced end-turn length. Harmonics in the airgap MMF have been characterized with standard winding functions and verified using finite element analysis (FEA). The multilayer winding design is optimized for a commercial premium efficiency/IE3 benchmark machine using grid multiobjective genetic algorithm (GMGA) and a prototype has been built. Performance of the designed motor has been verified with both FEA and experiments. Evaluation under IEEE 112 test standard demonstrates that by only updating its stator winding design, the designed motor can achieve IE4 class efficiency under the same frame size and cooling type as its IE3 class benchmark.}, number={4}, journal={IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS}, author={Kabir, Md Ashfanoor and Jaffar, Mohamed Zubair M. and Wan, Zhao and Husain, Iqbal}, year={2019}, pages={3630–3639} }
 @article{kabir_husain_2018, title={Application of a Multilayer AC Winding to Design Synchronous Reluctance Motors}, volume={54}, ISSN={["1939-9367"]}, DOI={10.1109/TIA.2018.2859033}, abstractNote={This paper presents the design and experimental validation of a synchronous reluctance motor (SynRM) using a multilayer (ML) ac winding that meets the ultra-premium/IE5 class efficiency requirement. Compared to conventional double-layer ac windings, the ML winding yields a more sinusoidal stator magnetomotive force (MMF) with a shorter end-turn length. The ML winding is characterized using an analytical stator MMF model with verification against finite element analysis (FEA). The proposed winding configuration is optimized under a given design benchmark. The multi-barrier rotor design is also optimized based on FEA using a genetic algorithm. The performance of the designed ML-SynRM is compared against a commercial premium efficiency induction motor and a conventionally wound SynRM for the same standard frame and cooling type. Results show significant efficiency gain with SynRM designs, and also, the designed ML-SynRM yields lower torque ripple with an improved power factor compared to the conventional SynRM. The prototype ML-SynRM is built, and its simulation results are experimentally validated against the benchmark including their performances at a thermal steady state.}, number={6}, journal={IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS}, author={Kabir, Md Ashfanoor and Husain, Iqbal}, year={2018}, pages={5941–5953} }
 @article{kabir_husain_2016, title={Design of Mutually Coupled Switched Reluctance Motors (MCSRMs) for Extended Speed Applications Using 3-Phase Standard Inverters}, volume={31}, ISSN={["1558-0059"]}, DOI={10.1109/tec.2015.2499086}, abstractNote={Design of a mutually coupled switched reluctance motor (MCSRM) competitive to the third generation interior permanent magnet synchronous motor (IPMSM) of Toyota Prius 2010 is presented. Compared with conventional SRM (CSRM), the proposed machine utilizes the standard six-switch voltage source inverter, which can facilitate the adoption of reluctance machines for traction applications. The structure of the MCSRM has been optimized for 60 kW output power over wide speed range of operation (2768-13500 r/min). Design details to improve machine torque density and to achieve the wide constant power speed range are presented. Performance evaluation under the targeted benchmark shows that the designed MCSRM can attain competitive performance metrics as that of the third generation IPMSM.}, number={2}, journal={IEEE TRANSACTIONS ON ENERGY CONVERSION}, author={Kabir, Md Ashfanoor and Husain, Iqbal}, year={2016}, month={Jun}, pages={436–445} }
 @inproceedings{kabir_husain_2016, title={New multilayer winding configuration for distributed MMF in AC machines with shorter end-turn length}, DOI={10.1109/pesgm.2016.7741756}, abstractNote={New multilayer winding configuration for AC machines is presented that can provide high quality rotating MMF with reduced space harmonics. Compared to the traditional distributed windings the designed winding has shorter end-winding length which will reduce stator I2R loss to improve power conversion efficiency. Unlike the existing fractional-pitch/concentrated winding counterparts, the designed winding provides near sinusoidal airgap MMF which reduces eddy current losses, iron losses and improves power factor. Performance of the designed winding is evaluated for a commercially available premium efficiency induction machine to show that the designed machine attain higher torque density and efficiency compared to the design benchmark. This new winding configuration can be a technology trend in gaining efficiency improvement with low cost non-PM designs under the standard frame sizes.}, booktitle={2016 ieee power and energy society general meeting (pesgm)}, author={Kabir, M. A. and Husain, I.}, year={2016} }
 @inproceedings{kabir_husain_2016, title={Segmented rotor design of concentrated wound switched reluctance motor (SRM) for torque ripple minimization}, DOI={10.1109/ecce.2016.7855420}, abstractNote={Torque ripple minimization of concentrated wound segmented rotor SRM is achieved through rotor segment designs. Compared to existing ripple minimization techniques the proposed method does not require current profiling, controller complexity or additional converter components. First, an FEA based semi-numerical machine model is developed to identify the torque ripple sources. Next, a new design of rotor segment is presented with segmented dip to effectively minimize torque ripple. Effect of different rotor design parameters on machine performance are studied. Both ‘one factor at a time’ and multi-dimensional, multi-objective optimization of design parameters are performed to evaluate their performances. The optimized design can reduce torque ripple by 29% which is a significant improvement considering the simplicity of this method.}, booktitle={2016 ieee energy conversion congress and exposition (ecce)}, author={Kabir, M. A. and Husain, I.}, year={2016} }
 @inproceedings{kabir_mikail_englebretson_husain_2015, title={3D FEA based squirrel cage rotor model for design tradeoffs and performance analysis}, DOI={10.1109/apec.2015.7104732}, abstractNote={An accurate rotor resistance estimation model of squirrel cage induction motors (SCIMs) is developed in 3D FEA. 2D transient analysis was utilized for excitations in the 3D model to improve its accuracy over previous 2D and analytical methods. Rated and starting performance from the FEA model match with the nominal and locked-rotor performance of a 3-phase, 460 V, 1 hp test machine. A modified ring model has been proposed and machine torque-slip characteristics and nominal performance have been analyzed. The effect of slot opening and 4 classes of SCIM bar geometry have been investigated to analyze their relative performance. Finally, four different ring and bar combinations are suggested, with the modified rotor structure presenting gain in starting and rated performance compared to the test machine. Results present the design tradeoffs and performance analysis, first for a 1 hp SCIM and then extended for a higher power (10 hp) machine.}, booktitle={2015 thirtieth annual ieee applied power electronics conference and exposition (apec 2015)}, author={Kabir, M. A. and Mikail, R. and Englebretson, S. and Husain, I.}, year={2015}, pages={2696–2702} }
 @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} }
 @inproceedings{kabir_husain_2015, title={Concentrated winding segmented rotor switched reluctance machine (SRM) using three-phase standard inverters}, DOI={10.1109/ecce.2015.7310443}, abstractNote={Two new topologies of three-phase segmented rotor switched reluctance machine (SRM) that enables the use of standard voltage source inverters (VSIs) for its operation are presented. The topologies has shorter end-turn length, axial length compared to SRM topologies that use three-phase inverters; compared to the conventional SRM (CSRM), these new topologies has the advantage of shorter flux paths that results in lower core losses. FEA based optimization have been performed for a given design specification. The new concentrated winding segmented SRMs demonstrate competitive performance with three-phase standard inverters compared to CSRM.}, booktitle={2015 ieee energy conversion congress and exposition (ecce)}, author={Kabir, M. A. and Husain, I.}, year={2015}, pages={5567–5572} }
 @inproceedings{kabir_husain_2015, title={Hybrid excitation topologies for three-phase mutually coupled reluctance machine with standard inverters}, DOI={10.1109/pesgm.2015.7286004}, abstractNote={New winding configurations for mutually coupled salient pole switched reluctance machines (MCSRMs) have been proposed that enables the application of three-phase standard inverters for variable speed drives. The proposed topologies comprise phase windings carrying balanced three phase currents from standard inverters along with DC excitation coils in the stator slots. Both concentrated and distributed hybrid winding configurations are proposed and performances of these MCSRMs are compared with that of the conventional SRM under the same machine geometry and phase excitation levels. The analysis and results show that the proposed machine configurations with standard inverters are more suitable for low cost, variable speed drives with higher power densities and lower torque ripples compared to conventional SRM drives.}, booktitle={2015 ieee power & energy society general meeting}, author={Kabir, M. A. and Husain, I.}, year={2015} }
 @inproceedings{kabir_husain_2014, title={Mutually coupled switched reluctance machine (MCSRM) for electric and hybrid vehicles}, DOI={10.1109/pesgm.2014.6939100}, abstractNote={A mutually coupled switched reluctance machine (MCSRM) comparable with interior permanent magnet synchronous machines (IPMSM) and conventional switched reluctance machines (CSRM) have been designed for hybrid electric vehicle (HEV) applications. The MCSRM can utilize the standard six switch inverter. The designed MCSRM is capable of wide speed range operation and has power and torque densities comparable to IPMSM and CSRM.}, booktitle={2014 ieee pes general meeting - conference & exposition}, author={Kabir, M. A. and Husain, I.}, year={2014} }