Fault tolerant dual-motor drives: Sizing of power electronic

Abstract

This paper analyzes two dual-motor fault-tolerant topologies. The first one supplies independently both machines while the second one connects them in series for reducing the number of transistors. For a given DC-link voltage, the converter component sizing is based on the peak current obtained in the normal and degraded modes.

Inverter open circuit faults diagnosis in series-connected six-phases permanent magnet drive

“…2. Consequently, the current components of each main machine are independently controlled, as shown in [5]- [6]. Even if the Back-EMFs were not sinusoidal, this independency of the control of the 2 machines would be assured in regular cases.…”

“…Therefore, by connecting two machines in series the transistors are mutualized, halving its number. In some cases, the series-connected topology may also increase the system performance in degraded mode by reducing the current amplitudes and the torque ripple [5]. In order to assure the independent control of both machines, the machines must at first be multiphase to have enough DoF in order to be able to control each machine.…”

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

“…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.…”

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

“…Thales Alenia Space -Thales Group, Charleroi, Belgium E-mails : (1) {mohamed.trabelsi, eric.semail, ngacky.nguyen}@ensam.eu INTRODUCTION Five-phase Permanent Magnet Synchronous Motor (PMSM) considered in this work is being studied for an aerospace Thrust Vector Control (TVC) system. The TVC system controls the orientation of the nozzle in order to define the trajectory of the rocket, as shown in Fig.1.…”

“…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.…”