Lumped magnetic circuit model for faulty machine performance prediction

Article type: Research Article

Authors: Zhang, Mengqi^* | Tseng, King-Jet

Affiliations: School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore

Correspondence: [*] Corresponding author: Mengqi Zhang, School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang, Singapore. E-mail:mzhang7@e.ntu.edu.sg

Abstract: A lumped magnetic equivalent circuit model is proposed to predict the electromagnetic performance of an interior permanent magnetic machine under stator inter-turn winding short-circuit fault. The model design takes into account iron core magnetic saturation, magnetic cross-coupling due to rotor saliency, and airgap magnetic circuit optimization. By comparing with finite element method analysis, the model presents appealing accuracy but much less required computation time in predicting machine flux distribution, winding inductance, and electromagnetic torque. These features prove the usefulness to promote MEC model as a convenient tool for machine performance prediction and fault analysis.

Keywords: Finite element method, magnetic circuit, machine perfromance prediciton, stator winding short-circuit

DOI: 10.3233/JAE-150112

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 50, no. 2, pp. 339-352, 2016