A comparative study of two fault-tolerant dual-motor drive topologies under short-circuit inverter switch fault

Abstract

is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. This is an author-deposited version published in: http://sam.ensam.eu Handle ID Abstract-This paper analyzes two dual-motor fault-tolerant topologies for aerospace thruster application. The first structure supplies independently both machines while the second one connects them in series for reducing the number of transistors and offering a capability of energy management between the sources. Inverter short-circuit fault is considered. Based on the peak-currents obtained in simulation in degraded mode without reconfiguration and with two different reconfiguration strategies, the two proposed topologies can be compared in economic and technical aspects.

Dual-Multiphase Motor Drives for Fault-Tolerant Applications: Power Electronic Structures and Control Strategies

“…Even though series connected machines are not regularly present in the industry, its functioning was already confirmed theoretically and experimentally [14]- [20]. A special electrical coupling between the machines allows their independent control.…”

“…The constraint mostly mentioned in papers [14]- [20] is the increase of the total Joule losses of the system. As a consequence, for systems whose operation of the drives is required in permanent operation, using series-connected machines leads to a high cost of operation.…”

“…Recent studies have analyzed the series-connected topologies in degraded mode [19]- [20]. Those papers compared the same two topologies as this paper for the same aerospace application.…”

“…This happens mostly because of the fact that some homopolar currents are null, thanks to the two isolated electrical sources. This paper will continue the analysis of the seriesconnected dual-machines topology and the H-bridge topology in degraded mode, including the comparison of different control strategies that were not investigated in [19]- [20]. Both topologies are composed of two 6-phase machines, which may be represented by 4 fictitious machines according to the multiphase multi-machine theory [21].…”

Open-switch and open-phase real time FDI process for multiphase PM Synchronous Motors

“…The proposed solution is composed of two electromechanical five-phase PMSM which replace the classical structure based on two hydraulic actuators. More details about the general functioning principle are given in [1] and [2] but for six-phase PMSM that is more adaptable to high power and presents more degrees of freedoms (DoF) especially under short-circuit fault. The choice of any phase number depends essentially of the fault number that can be tolerated in the system.…”