Double Rotor Synchronous Reluctance Machine: Analysis towards Torque Capability

This paper presents a comparative analysis of double rotor synchronous reluctance machines. Different topologies of the proposed machine have been investigated, such as double rotor with double-sided stator and double rotor with single-sided stator machines. A comparison between these topologies has been conducted to understand the potential of improving the machine capabilities in terms of high average torque/power density, with respect to the conventional synchronous reluctance machine. The benefits of a double rotor topology are described in detail considering different number of stator slots. Furthermore, given the higher structural complexity with respect to a single airgap machine, a mechanical analysis of the inner and outer rotors has been conducted to assess the robustness of the inner and outer rotors iron ribs.