Slotless and coreless machines with low inductance and low core losses are attractive for high speed and high power density applications. With the increase in fundamental frequency, typical drive implementations using conventional silicon-based devices are performance limited and also produce large current and torque ripples. This paper presents a systematic study of proposed drive configurations implemented with wide bandgap (WBG) devices in order to mitigate such issues for 2-phase very low inductance machines. Two inverter topologies, i.e., a dual H-bridge inverter with maximum redundancy and survivability and a 3-leg inverter for reduced cost, are considered. Feasible modulation schemes are derived based on theoretical analysis and the associated maximum output voltages are identified. Simulation and experimental results are provided to validate the feasibility of drive systems and the effectiveness of analysis.

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Conference Proceeding

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Notes/Citation Information

Published in 2020 IEEE Energy Conversion Congress and Exposition (ECCE).

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The document available for download is the authors’ manuscript version accepted for publication. The final published version is copyrighted by IEEE and available as: Y. Zhang, D. Lawhorn, P. Han, A. M. Cramer and D. M. Ionel, “Electric Drives with Wide Bandgap Devices for Two-Phase Very Low Inductance Machines,” 2020 IEEE Energy Conversion Congress and Exposition (ECCE), Detroit, MI, USA, 2020, pp. 6125-6129, doi: 10.1109/ECCE44975.2020.9235388

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Funding Information

The support of National Science Foundation NSF Grant #1809876, of University of Kentucky, and of the L. Stanley Pigman endowment, Inc. is gratefully acknowledged.