Research topic: Electrical Machine\Cryogenic

Luís F. D. Bucho; João F. P. Fernandes; Marco Biasion; Silvio Vaschetto; Andrea Cavagnino;

Journal: IEEE Transactions on Energy Conversion (2022)

Short Abstract:

In this work, an experimental assessment of the influence of cryogenic cooling in a conventional induction motor is presented. The performance of a fractional kilowatt induction motor is evaluated when submerged in liquid nitrogen. Using the single-phase equivalent electric circuit, the influence of the temperature and skin-effect is analyzed in the variation of the machine’s parameters, under ambient and cryogenic conditions. Also, the variation of the iron core and mechanical losses are evaluated. An analytical methodology is proposed to estimate the change of motor performance under cryogenic conditions. The experimental tests in cryogenic conditions show the possibility of achieving higher efficiency levels with more than double the nominal torque.

Additional content:

Torque-speed curve: ambient and cryogenic conditions

Losses segregation at ambient and cryogenic conditions