A new design technique based on a suitable choice of rotor geometrical parameters to maximize torque and power factor in synchronous reluctance motors. I. Theory

The influence of rotor geometry of synchronous reluctance motors (SRMs) on the x_d/x_q ratio, electromagnetic torque and iron losses is studied. Both air-gap length and rotor pole are are taken into account as parameters. First, a new theoretical approach is developed which neglects saturation effects (Part I). In a companion paper (Part II), a complete finite-element analysis of a particular SRM is carried out, followed by a comparison with results obtained by tests performed in a prototype machine, which was constructed in order to validate the proposed methodology