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World Electric Vehicle Journal is published by MDPI from Volume 9 issue 1 (2018). Articles in this Issue were published by The World Electric Vehicle Association (WEVA) and its member the European Association for e-Mobility (AVERE), the Electric Drive Transportation Association (EDTA), and the Electric Vehicle Association of Asia Pacific (EVAAP). They are hosted by MDPI on mdpi.com as a courtesy and upon agreement with AVERE.
Open AccessArticle

Analysis of the Fault Tolerance of a Switched Reluctance Machine with Distributed Inverter

Institute for Power Electronics and Electrical Drives, RWTH Aachen University Jaegerstr- 17-19. 52064 Aachen
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World Electr. Veh. J. 2012, 5(2), 482-493; https://doi.org/10.3390/wevj5020482
Published: 29 June 2012
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Abstract

This paper analyzes how distributed inverters can further increase the fault tolerance of switched reluctance traction drives. The drive under investigation is an outer-rotor direct-drive switched reluctance machines (SRM) for railway traction. The phases of SRMs are magnetically and to a certain extend electrically decoupled. Hence, in case of a fault inside a phase, the remaining phases can continue operation with reduced power. With the distributed inverter concept at hand, each coil of a phase is excited by its own modular inverter. This increases the redundancy, simplifies integration of machine and inverter, and enables a new degree of freedom regarding the control of the machine. Especially for electric drives used in railway traction or electric vehicles, redundancy avoids all the inconveniences of a standstill in case of a fault, enabling a so-called limp home capability. This paper shows, how open- and short-circuit faults of single coils or modules of the proposed drive influence average torque, torque ripple, and noise and vibration. Therewith, it will be shown that with the SRM and the distributed inverter it is possible to continue operation in case of the analyzed faults.
Keywords: electric drive; powertrain; switched reluctance motor; inverter; reliability; limphome electric drive; powertrain; switched reluctance motor; inverter; reliability; limphome
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Hennen, M.D.; Boesing, M.; De Doncker, R.W. Analysis of the Fault Tolerance of a Switched Reluctance Machine with Distributed Inverter. World Electr. Veh. J. 2012, 5, 482-493.

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