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<p>When analyzing induction machines with skewed slots, analytical models are often considered a valid substitute for the Finite Element Method (FEM) to reduce computation time. However, incorporating complex effects of induction motors, such as the slotting effect, saturation effect, and skewing effect, into the analytical model is challenging. This paper presents an electromagnetic analytical model (EAM) used to predict the transient characteristics of squirrel cage induction motors. In this model, the slotting effect, saturation effect, and skewing effect are accounted for by combining the winding function, conformal mapping (CM), and equivalent magnetic circuit (EMC). As a specific example, a 7.5&#xa0;kW, 2-pole induction motor was studied, and the current, torque, speed, and air-gap flux density were calculated. The effectiveness of the proposed model was validated by comparing the results with those obtained from FEM and experimental data. The results indicate that the model can accurately capture both time and space high-order harmonics and has great potential in estimating the transient performance of induction machines.</p>

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An Electromagnetic Analytical Model of Squirrel Cage Induction Motors for Transient Performance Prediction

  • 期刊论文

  • 发表日期：

    2025年4月7日

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  • Yanbo Wang,
  • Tao Shen,
  • Yongming Xu

摘要

When analyzing induction machines with skewed slots, analytical models are often considered a valid substitute for the Finite Element Method (FEM) to reduce computation time. However, incorporating complex effects of induction motors, such as the slotting effect, saturation effect, and skewing effect, into the analytical model is challenging. This paper presents an electromagnetic analytical model (EAM) used to predict the transient characteristics of squirrel cage induction motors. In this model, the slotting effect, saturation effect, and skewing effect are accounted for by combining the winding function, conformal mapping (CM), and equivalent magnetic circuit (EMC). As a specific example, a 7.5 kW, 2-pole induction motor was studied, and the current, torque, speed, and air-gap flux density were calculated. The effectiveness of the proposed model was validated by comparing the results with those obtained from FEM and experimental data. The results indicate that the model can accurately capture both time and space high-order harmonics and has great potential in estimating the transient performance of induction machines.