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14 results on '"Bandarkar, Abdul Wahab"'

1. Design Optimization of Bifilar Wound Switched Reluctance Motor Drives

Author

Sancar, Senol, Islam, Mohammad Muntasir, Bandarkar, Abdul Wahab, Haque, Md Ehsanul, Vadamodala, Lavanya, Sozer, Yilmaz, and Garcia, Reginald

Abstract

The bifilar wound switched reluctance motor (BSRM) has transformer-like windings on the stator known as primary and secondary windings and has a unique power converter known as the bifilar converter. In this study, an optimized BSRM winding topology along with the lossless snubber for the converter is proposed. The topology investigates the uneven number of turns on the primary and secondary windings of the BSRM while taking into account the converter switch voltage spike, secondary winding current density, and demagnetization time. A lossless snubber circuit is introduced to suppress the switch voltage spike caused by the leakage inductance while preserving the efficiency of the bifilar converter. Another motivation for this research is that the bifilar converter uses fewer switches and diodes than the asymmetric half-bridge converter, which is promising to reduce costs and improve drive system efficiency. The BSRM drive system is designed and compared with the same size conventionally wound switched reluctance motor (CSRM) drive system in terms of physical structure, and efficiency using a multi-physics circuit and finite element analysis (FEA) simulation tools. The operating principle of the bifilar converter has been thoroughly examined, further, the physical setup of the BSRM drive system is tested, and the experimental results are provided.

Published
2024
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4. Design Aspects, Challenges and Benefits of SiC-Based Integrated Switched Reluctance Machine Drives

Author

Haque, Md Ehsanul, primary, Chowdhury, Anik, additional, Rahman, Mohammad Arifur, additional, Das, Shuvajit, additional, Bandarkar, Abdul Wahab, additional, Bin Tarek, Md Tawhid, additional, Boler, Okan, additional, Sozer, Yilmaz, additional, Siddiquee, Ashraf, additional, Geither, Jeffrey, additional, Colavincenzo, David, additional, and Venegas, Fernando, additional

Published
2022
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9. Multiphysics Analysis to Effectively Evaluate Thermal Performance of Liquid-Cooled Electric Machines.

Author

Bandarkar, Abdul Wahab, Tarek, Md Tawhid Bin, Vadamodala, Lavanya, Sozer, Yilmaz, Colavincenzo, David, Venegas, Fernando, and Geither, Jeffrey

Subjects
*HEAT transfer coefficient, *ELECTRIC machines, *COMPUTATIONAL fluid dynamics, *ELECTRIC machinery, *TEMPERATURE distribution
Abstract

The prediction of the maximum operating temperature in electric machines is very important to ensure that the machine can produce the required power safely. Accurate thermal modeling is required to predict the heat transfer coefficient (HTC) of walls between coolant and heat sources and estimate the temperature in the machine. Analytical calculation of HTC is difficult for sophisticated geometric bodies since the dimensionless correlations are only available for simple geometries. To reduce the effort required to develop a thermal model of the cooling system of an electric machine, a two-way hybrid multiphysics approach using finite-element analysis (FEA) and computational fluid dynamics (CFD) to determine the HTC and evaluate the thermal performance of a liquid-cooled electric machine is presented in this article. In this study, a 60-kW switched reluctance machine (SRM) is used as an example model to evaluate its thermal performance. In the hybrid multiphysics approach, using the HTC estimated by CFD and heat generation in the machine as the inputs, the FEA is used to determine the maximum steady-state temperature in the machine. An analytical approach is also implemented to determine the HTC of the example SRM to correlate with the HTC obtained using a hybrid approach. The analytical HTC is used in FEA to obtain the temperature distribution in the machine. The temperature obtained from hybrid and analytical approaches is compared. The SRM considered in this study is built and tested for different operating points. The machine is tested for a long time to record the steady-state temperature at different operating points. Results obtained from the hybrid approach are validated with the experimental temperature data. [ABSTRACT FROM AUTHOR]

Published
2022
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