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Improving the induction motor power density by its operation at liquid nitrogen bath

This work presents a study of an induction motor at two different operating temperature conditions: room temperature and 77?K. The goal is to analyze its performance and obtain its most relevant features. Experimental tests were carried out in the laboratory under room temperature and liquid nitrogen (LN2) bath. The authors designed a prototype bench with a controlled load to measure magnitudes like torque, speed, current, power, power factor, efficiency, and others. The results show a considerable increase in the torque and efficiency, but in contrast, the starting torque is drastically reduced at cryogenic temperature. Besides, at 77?K, the slip is much lower than at room temperature. The experiments show a substantial rise in the motor?s power density, indicating that cooled induction motors can be applied in applications where volume and weight are restricted.

» Author: Fernando Jorge Monteiro Dias, Guilherme Gon?alves Sotelo, Rubens de Andrade J?nior

» Publication Date: 01/10/2022

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