Picture water droplets

Developing mathematical theories of the physical world: Open Access research on fluid dynamics from Strathclyde

Strathprints makes available Open Access scholarly outputs by Strathclyde's Department of Mathematics & Statistics, where continuum mechanics and industrial mathematics is a specialism. Such research seeks to understand fluid dynamics, among many other related areas such as liquid crystals and droplet evaporation.

The Department of Mathematics & Statistics also demonstrates expertise in population modelling & epidemiology, stochastic analysis, applied analysis and scientific computing. Access world leading mathematical and statistical Open Access research!

Explore all Strathclyde Open Access research...

Central-tapped node linked modular fault tolerance topology for SRM applications

Hu, Yihua and Gan, Chun and Cao, Wenping and Li, Wuhua and Finney, Stephen (2016) Central-tapped node linked modular fault tolerance topology for SRM applications. IEEE Transactions on Power Electronics, 31 (2). pp. 1541-1554. ISSN 0885-8993

[img]
Preview
Text (Hu-etal-TPE-2016-modular-fault-tolerance-topology-for-SRM-applications)
Hu_etal_TPE_2016_modular_fault_tolerance_topology_for_SRM_applications.pdf
Accepted Author Manuscript

Download (999kB) | Preview

Abstract

Electric vehicles (EVs) and hybrid electric vehicles (HEVs) can reduce greenhouse gas emissions while switched reluctance motor (SRM) is one of the promising motor for such applications. This paper presents a novel SRM fault diagnosis and fault tolerance operation solution. Based on the traditional asymmetric half-bridge topology for SRM driving, the central tapped winding of SRM in modular half bridge configuration are introduced to provide fault diagnosis and fault tolerance functions, which are set idle in normal conditions. The fault diagnosis can be achieved by detecting the characteristic of the excitation and demagnetization currents. An SRM fault tolerance operation strategy is also realized by the proposed topology, which compensates for the missing phase torque under the open-circuit fault, and reduces the unbalanced phase current under the short-circuit fault due to the uncontrolled faulty phase. Furthermore, the current sensor placement strategy is also discussed to give two placement methods for low cost or modular structure. Simulation results in Matlab/Simulink and experiments on a 750 W SRM validate the effectiveness of the proposed strategy, which may have significant implications and improve the reliability of EVs/HEVs.