Analysis of Starting Torque and Speed Characteristics for Squirrel Cage Induction Motor According to Material Properties of Rotor Slot

Abstract

Squirrel cage induction motors have mostly been used for their small capacity because the starting torque is smaller than the starting current during start-up. However, as more and more mid-to-large capacity motors are developed, the demands for improvements in performance characteristics have also increased. In this study, the starting characteristics of squirrel cage induction motors were analyzed based on the rotor materials and shapes using a finite element method to provide design data suitable for different use purposes and capacities. We further completed analysis by combining electromagnetic equations deduced from Maxwell's equations and the circuit equations of stators and rotors. A moving coordinator was introduced to rotate the rotor during the analysis, and the torques calculated via the finite element method were combined with the motion equations to calculate the position and angular velocity of the rotors at the next time, thereby analyzing the transient characteristics. The analysis results of the transient characteristics were applied to a 3-phase 4-pole 5-hp induction motor to calculate the starting torque, speed, and rotation angle of the rotors. In the reference model, the materials and shapes of the rotor slot were changed to copper and silicon copper and a deep slot, shallow slot, and long-neck-shaped slot.

Thermal Analysis and Cooling Strategies of High-Efficiency Three-Phase Squirrel-Cage Induction Motors—A Review

“…The advantages and disadvantages of using a copper cage were analyzed under different operating conditions [36]. Kim (2015) analyzed the speed characteristics and starting torque for a squirrel-cage induction motor related to the material properties of the rotor. The results of the transient characteristics were given to a three-phase, four-pole, 5 hp induction motor for calculating the speeds, starting torque, and rotation angle of the rotors.…”

“…The results of the transient characteristics were given to a three-phase, four-pole, 5 hp induction motor for calculating the speeds, starting torque, and rotation angle of the rotors. The materials of the model were changed to copper and silicon copper [37]. Wijaya et al (2021) studied the effect of different core materials in very-low-voltage induction motors for electric vehicles.…”

Time Series Electrical Motor Drives Forecasting Based on Simulation Modeling and Bidirectional Long-Short Term Memory

“…Accurate and ongoing measurement of the stator currents and rotor position is crucial for the proper operation of DTC. Using DEMUX, the stator current and rotor position signals can be separated into independent output signals, enabling more precise control of the motor's torque and speed [42].…”

Asenkron Motor Geometrisinin Motor Yol Alma Süresine Etkilerinin İncelenmesi

“…Kim çalışmasında, sincap kafesli bir asenkron motorun yol alma karakteristiklerini, rotor malzemesine ve farklı rotor oluk şekilleri için analiz etmiştir. Analizler sonlu elemanlar yöntemi kullanılarak yapılmış ve farklı kullanım amaçları ve kapasitesi için uygun tasarım verileri elde edilmiştir [12].…”

“…Modellemelerde moment parametresi olarak nominal moment değerleri girilmiş ve analizler yapılmıştır. Asenkron motorların yol alma süresini minimum seviyeye çekmek ve yol alma akımını sınırlamak amacı ile literatürde birçok model ve yöntem mevcuttur [12,[16][17][18]. Bu çalışmada ise asenkron motorun rotor oluk yüksekliğinin, hava aralığı boyunun ve farklı rotor oluk yapılarının etkisinin net bir şekilde görülebilmesi amacıyla Matlab Simulink modeli sadece kaynak, motor modeli ve rotor devir sayısının gösterildiği bir göstergeden meydana gelecek şekilde tasarlanmıştır.…”