Effect of Geometrical Parameters on Optimal Design of Synchronous Reluctance Motor

Abstract

Torque ripple minimization without decrease in average torque is a vital attribute in the design of Synchronous Reluctance (SynRel) motor. As the design of SynRel motor is an arduous task, which encompasses many design variables, this work first analyses the significance of the effect of varying the geometrical parameters on average torque and torque ripple and then proposes an extensive optimization procedure to obtain configurations with improved average torque and minimized torque ripple. A hardware prototype is fabricated and tested. The Finite Element Analysis (FEA) software tool used for validating the test results is MagNet 7.6.0.8. Multi Objective Particle Swarm Optimization (MOPSO) is used to determine the various designs meeting the requirements of reduced torque ripple and improved torque performance. The results indicate the efficacy of the proposed methodology and substantiate the utilization of MOPSO as a significant tool for solving design problems related to SynRel motor.

Bulletin of the Polish Academy of Sciences: Technical Sciences

“…Contour map representation [8] of variations of average torque and torque ripple percentage with respect to the key design parameters, angular positions at air gap, δ 1 and δ 2 (highest h-index and level sensitivity index) of the PMASR motor for a specific range are shown in Fig. 8 and Fig.…”

“…Yet anisotropic rotor configurations influenced by the presence of a large number of geometrical parameters [4][5][6][7][8] in the PMASR motor rotor pose design challenges in obtaining a robust geometry satisfying the requirements of different applications. Therefore, it is necessary to perform design optimization [9][10][11][12], considering multiple objectives to enhance the motor's performance.…”

“…The magnets are placed in increasing order of volume, from the rotor periphery to the shaft [6,7]. The shape of flux barriers is similar to the shape used in [8,9]. The angular positions at air gap are chosen from [8].…”

“…The shape of flux barriers is similar to the shape used in [8,9]. The angular positions at air gap are chosen from [8]. The CAD diagram defining the geometrical design parameters of one half cross section of the PMASR motor is presented in Fig.…”