Abstract
Induction motors fed by PWM inverter have great advantages in speed control. However, the output voltage waveform of PWM inverter have a great influence on the loss characteristics of induction motor. For control the overall loss of motor and inverter effectively, a fast-analytical calculation model of iron losses based on the output voltage of inverter is proposed. In the proposed model, the influence of the output harmonic voltage of the inverter and the spatial harmonic components on the iron losses are considered. Based on the proposed analytical calculation method of iron loss, the equivalent circuit model of induction motor considered the iron losses is obtained in this paper. To verify the validity of this model, the iron losses of a 5.5 kW inverter-fed induction motor, under different operation conditions are calculated using the proposed model, classical iron loss model and piecewise variable coefficient model (based on time-step finite element method), respectively. The results show that the accuracy of the proposed model is acceptable. The conclusions of this paper can provide theoretical support for the optimal control of overall losses of the inverter and motor.
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Acknowledgements
This work was supported in part by National Key Research and Development Program of China under Grant (2017YFB0901900).
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Jiang, M., Yi, J., Zhang, D., Guo, X., Qin, Q. (2021). An Analytical Core Loss Admittance Calculating Method and an Equivalent Circuit Modeling Method of Induction Motors Fed by Converter Considering Space-Time Harmonics. In: Chen, W., Yang, Q., Wang, L., Liu, D., Han, X., Meng, G. (eds) The Proceedings of the 9th Frontier Academic Forum of Electrical Engineering. Lecture Notes in Electrical Engineering, vol 743. Springer, Singapore. https://doi.org/10.1007/978-981-33-6609-1_75
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DOI: https://doi.org/10.1007/978-981-33-6609-1_75
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