Design and Analysis of Line Start Synchronous Reluctance Motor with Dual Saliency

This paper presents a design for a line start Synchronous Reluctance Motor (SynRM) capable of operating in two different synchronous speeds. The proposed design is based on variable pole numbers for the stator and the rotor. To accommodate the stator with variable pole numbers, the stator winding consists of two sets of independent windings to switch the operating pole number for low and high speed regions. Likewise, the rotor is especially designed to create two different reluctance pole numbers to match with the operating stator pole numbers. The proposed design enables the motor to operate as a SynRM at two different operating speeds without requiring a drive unit. To verify the performance of the proposed design, the motor is analyzed in steady state and transient domain using 3-D Finite Element Analysis (FEA).