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Design of a high-speed synchronous reluctance motor made of dual-phase steel

To run at high speeds is an important development trend of electrical machines to increase the power density thereby reducing weight and size. A key challenge to run a rotor to a high speed is its high centrifugal force, which might lead to rotor cracking. To strengthen the rotor without using non-magnetic sleeves, the magnetic loading of electrical machines is generally reduced due to flux leakage pass through rib regions. Therefore, higher mechanical strength and lower saturation flux density of rib regions are preferred for high-speed rotors. Dual-phase magnetic materials consisting of non-magnetic and magnetic regions meet these requirements very well. This paper studies the performance of a synchronous reluctance motor made of a dual-phase magnetic material produced by electron beam welding method. The influence of the rotor design on the performance of synchronous reluctance motors is studied in depth, taking into account the difficulty and time of material and motor processing.