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Machine synchro-réluctante à haute température interne (500° C)

Abstract : Electrical machines with their electronic control systems offer very interesting functional possibilities, but they can only be used permanently in a limited temperature range because of their polymer electrical isolation system. After analyzing the technological locks that limit the internal temperature of current electrical machines, the structure of a machine able to work at a very high internal temperature, around 500°C is proposed. The proposed machine is designed with an inorganic electrical isolation system made without any polymer. The coils of the experimental machine are made with a specific design; tests prove that the proposed coils are able to withstand the electrical stresses imposed by the steep fronts of the PWM inverters supplied by the HVDC 540V bus at high temperatures. To avoid the thermal limits related to the magnets, the proposed structure is the synchro-reluctant machine with concentrated windings. The magnetic circuit consists of sheets of FeCo at the stator and FeSi at the rotor. The magnetic sheets must be insulated by their natural oxidation. A theoretical study of the possible topologies and a process of design and optimization of geometry of the critical elements is performed. A prototype that implements the proposed solutions has been constructed. Experiments on this prototype at an ambient temperature of 320°C and an internal temperature of 550°C show that it is possible to operate permanently at these temperatures. A critical analysis presents the new limits of this high temperature of machine.
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https://hal.univ-lorraine.fr/tel-02998707
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Submitted on : Tuesday, November 10, 2020 - 4:03:11 PM
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  • HAL Id : tel-02998707, version 1

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Hamed Elmadah. Machine synchro-réluctante à haute température interne (500° C). Energie électrique. Université de Lorraine, 2020. Français. ⟨NNT : 2020LORR0109⟩. ⟨tel-02998707⟩

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