Conference: 2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG)
Authors: Min-Ro Park, Kyoung-Soo Cha, Jae-Woo Jung, Myung-Seop Lim
DOI:10.1109/TMAG.2019.2949613
This paper presents the design process of a sensorless-oriented interior permanent magnet synchronous motor (IPMSM) with concentrated winding, based on spatial saliency for traction in electric vehicles. The purpose of the design method is to ultimately achieve both stable rotor position detection and acceptable torque characteristics such as cogging torque and torque ripple. After describing the evaluating procedure of sensorless controllability, the effects of the stator chamfer and notch are analyzed to figure out their effectiveness on sensorless drive. Focusing on the analysis results of the geometric parameters, the improved model is designed through optimization, considering both sensorless controllability and torque characteristics. Response surface methodology (RSM) is used for optimization. Then, the machine characteristics including the sensorless controllability as the simulation results of the prototype and improved model are compared. It is founded that the accuracy of the rotor position estimation and torque characteristics is improved simultaneously by means of the optimum design. Finally, the validity of the simulation results is verified by comparison with the test results of the prototype.