Three-Phase Small-Power Low-Speed Induction Motor with Can-Type Rotor

Krzysztof Sołtys () and Krzysztof Kluszczyński
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Krzysztof Sołtys: Faculty of Electrical and Computer Engineering, Cracow University of Technology, Warszawska Str. 24, 31-155 Cracow, Poland
Krzysztof Kluszczyński: Faculty of Electrical and Computer Engineering, Cracow University of Technology, Warszawska Str. 24, 31-155 Cracow, Poland

Energies, 2025, vol. 18, issue 18, 1-14

Abstract: To explore possible design solutions for induction motors, we designed and tested a three-phase small-power induction motor with a can-type rotor and a stationary internal ferromagnetic core, a design not previously described in the technical literature. This three-phase motor combines certain features of a reliable solid-rotor motor, a two-rotor layer motor, and a motor in which the rotating thin aluminium layer is separated from the stationary inner ferromagnetic core. The motor prototype was based on a mass-produced, small-power, three-phase squirrel-cage motor. Its operating properties and characteristics were tested, highlighting its potential application as a special-purpose drive or a very interesting case for teaching purposes in laboratories of electrical machines. Measurements confirmed theoretical predictions and enabled the formation of a motor equivalent circuit with shunt and series branch parameters, among which magnetization reactance and rotor resistance varied with rotational speed. The main advantages of the motor are its simple rotor construction, low rotational speed, low-rotor inertia and good dynamics, as well as reliable operation across the entire range of useful torque from no-load to short-circuit conditions, without the risk of overheating.

Keywords: special induction motor; can-type rotor; motor equivalent circuit; eddy currents; laboratory stand; measurement tests (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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