Contribution à la continuité de service des actionneurs synchrones à aimants permanents. Tolérance au défaut de capteur mécanique : détection de défauts électriques

Abstract : In embedded systems, electric actuators tend to replace hydraulic ones for compactness and manoeuvrability reasons. However, these electric actuators should be as reliable as hydraulic ones. For these actuators, adapted power topologies should be chosen in order to operate even if a failure occurs in the electromechanical conversion chain. To ensure the continuity of service in fault case, different kinds of actuator's failures should be detected in time. Obviously, the detection methods should be adapted to the fault types. In this work, we developed two aspects related to the continuity of service, the first one on the sensorless control of permanent magnet synchronous machines (PMSM), its robustness and its application in mechanical sensor loss case. The second one deals with the detection of inter-turn insulation fault in stator windings of permanent magnets synchronous machines supply by voltage inverter. In a first time a PMSM model with inter-turn fault is developed, this model allows us to propose two detection methods. Both methods are based on the electric unbalance of the machine and are experimentally validated. Finally a third method based on resistance estimation is presented. These three methods are real time methods and no extra sensor is needed for a standard control
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Thierry Boileau. Contribution à la continuité de service des actionneurs synchrones à aimants permanents. Tolérance au défaut de capteur mécanique : détection de défauts électriques. Autre. Institut National Polytechnique de Lorraine, 2010. Français. ⟨NNT : 2010INPL068N⟩. ⟨tel-01749443⟩

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