Abstract
Background: Induction motor plays a major role in various industries, and its importance is increasing. Due to the environmental temperature or sealed working environment, heat generation is generally severe. The heat exchange with the outside environment does not take place smoothly, and the motor temperature increases. The performance of the induction motor is also significantly influenced by the temperature. Therefore, it is necessary to study the influence of temperature on the performance of induction motor.
Objective: This study aimed to analyse the influence of temperature on induction motor. At different temperatures, variation in performance parameters has been observed.
Methods: Taking an 11 kW 1500r/min induction motor as an example, a two-dimensional transient electromagnetic field model was established, and the correctness of the model was verified by experiments. The motor starting performance, various losses and efficiencies under different temperatures wereestimated.
Results: As the stator and rotor resistance increased, the starting current decreased by 11.99% when the internal temperature rose from 25°C to 150°C. When the internal temperature rose from 25°C to 150°C, the stator copper loss increased by 32.83%, and the rotor copper loss increased by 28.79%. However, the core loss of the motor increased by 3W, and the motor efficiency decreased by 2.12%.
Conclusion: When the temperature is different, the starting torque of the motor is almost unchanged, and the starting current decreases with an increase in temperature. The stator copper loss and rotor copper loss of the motor increase with the increase in temperature, while the core loss is almost unchanged. In addition, the efficiency of the motor gradually decreases with the increase in temperature.
Keywords: Induction motor, FEM, temperature, electromagnetic field, loss, efficiency.
Graphical Abstract
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