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Experimental identification of the induction machine frame convection coefficient for varying ventilator speeds

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Abstract
Thermal modeling of induction machines is becoming increasingly important to improve the operational efficiency and performance. Lumped-Parameter Thermal Networks are both flexible and suitable for online use, but their parameters must be well identified to obtain accurate temperature predictions. The convection coefficient between the motor frame and the environment is a particulary difficult parameter to obtain analytically because it summarizes complex fluid flows across the motor. In this paper, the frame convection coefficient and frame convection resistance of a 5.5 kW induction machine is determined experimentally for different external ventilator speeds. It is shown that the average frame convection coefficient increases for increasing ventilator speeds, whereas the convection resistance is inversely proportional to the fan speed. Furthermore, the local convection coefficient changes as function of the axial frame position due to a decreasing local air speed further away from the fan end.

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MLA
Nguyen Phuc, Pieter, et al. “Experimental Identification of the Induction Machine Frame Convection Coefficient for Varying Ventilator Speeds.” 2019 22nd International Conference on Electrical Machines and Systems (ICEMS), IEEE, 2019, doi:10.1109/icems.2019.8922176.
APA
Nguyen Phuc, P., Vansompel, H., Bozalakov, D., Stockman, K., & Crevecoeur, G. (2019). Experimental identification of the induction machine frame convection coefficient for varying ventilator speeds. 2019 22nd International Conference on Electrical Machines and Systems (ICEMS). Presented at the 22nd International Conference on Electrical Machines and Systems (ICEMS), Harbin, China. https://doi.org/10.1109/icems.2019.8922176
Chicago author-date
Nguyen Phuc, Pieter, Hendrik Vansompel, Dimitar Bozalakov, Kurt Stockman, and Guillaume Crevecoeur. 2019. “Experimental Identification of the Induction Machine Frame Convection Coefficient for Varying Ventilator Speeds.” In 2019 22nd International Conference on Electrical Machines and Systems (ICEMS). IEEE. https://doi.org/10.1109/icems.2019.8922176.
Chicago author-date (all authors)
Nguyen Phuc, Pieter, Hendrik Vansompel, Dimitar Bozalakov, Kurt Stockman, and Guillaume Crevecoeur. 2019. “Experimental Identification of the Induction Machine Frame Convection Coefficient for Varying Ventilator Speeds.” In 2019 22nd International Conference on Electrical Machines and Systems (ICEMS). IEEE. doi:10.1109/icems.2019.8922176.
Vancouver
1.
Nguyen Phuc P, Vansompel H, Bozalakov D, Stockman K, Crevecoeur G. Experimental identification of the induction machine frame convection coefficient for varying ventilator speeds. In: 2019 22nd International Conference on Electrical Machines and Systems (ICEMS). IEEE; 2019.
IEEE
[1]
P. Nguyen Phuc, H. Vansompel, D. Bozalakov, K. Stockman, and G. Crevecoeur, “Experimental identification of the induction machine frame convection coefficient for varying ventilator speeds,” in 2019 22nd International Conference on Electrical Machines and Systems (ICEMS), Harbin, China, 2019.
@inproceedings{8639204,
  abstract     = {{Thermal modeling of induction machines is becoming increasingly important to improve the operational efficiency and performance. Lumped-Parameter Thermal Networks are both flexible and suitable for online use, but their parameters must be well identified to obtain accurate temperature predictions. The convection coefficient between the motor frame and the environment is a particulary difficult parameter to obtain analytically because it summarizes complex fluid flows across the motor. In this paper, the frame convection coefficient and frame convection resistance of a 5.5 kW induction machine is determined experimentally for different external ventilator speeds. It is shown that the average frame convection coefficient increases for increasing ventilator speeds, whereas the convection resistance is inversely proportional to the fan speed. Furthermore, the local convection coefficient changes as function of the axial frame position due to a decreasing local air speed further away from the fan end.}},
  author       = {{Nguyen Phuc, Pieter and Vansompel, Hendrik and Bozalakov, Dimitar and Stockman, Kurt and Crevecoeur, Guillaume}},
  booktitle    = {{2019 22nd International Conference on Electrical Machines and Systems (ICEMS)}},
  isbn         = {{9781728133980}},
  issn         = {{2640-7841}},
  language     = {{eng}},
  location     = {{Harbin, China}},
  pages        = {{6}},
  publisher    = {{IEEE}},
  title        = {{Experimental identification of the induction machine frame convection coefficient for varying ventilator speeds}},
  url          = {{http://doi.org/10.1109/icems.2019.8922176}},
  year         = {{2019}},
}

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