Flux Path Design of Synchronous Reluctance Motor to Analyze Torque Characteristic and Operating Region

Abstract

The performance characteristics of a synchronous reluctance motor (SynRM) are sensitive to the linkage flux and saturation degree at the core by the shape of the stator and rotor, and the input source, as other energy sources, such as magnets, are not placed inside the rotor. Thus, flux path design is a critical parameters to improve the torque characteristics and operating region of the machine. In this paper, the methods of improving the torque characteristics and operating region of the SynRM are proposed by changing the design parameters, such as the flux barrier in the rotor part and the tooth width in the stator part, which are design parameters of the main flux paths. To demonstrate the validity of the method, the SynRM characteristics are analyzed by changing the motor variables. Furthermore, linkage flux, power factor, inductance map by the d-q axis current, and T-N curve are calculated to clarify their effects on the operating region.