MEASUREMENT OF LOCAL ELECTRIC AND MAGNETIC QUANTITIES INSIDE ELECTRICAL INDUCTION MOTORS
Oriano Bottauscio – Mario Chiampi – Lorenzo Donadio – Mauro Zucca
The development of more and more accurate numerical models for the analysis of the electromagnetic phenomena occurring inside electrical induction motors calls for the availability of experimental validations to be obtained in laboratory tests. The requirement of an experimental validation cannot be limited to integral quantities (supply currents, input power, etc.), but also to local physical quantities inside the machine, such as magnetic fluxes in stator and rotor core and currents flowing in the rotor cage. The comparison of computed and measured results allows a deep insight on the capability of the mathematical model to accurately reproduce the phenomena, and consequently of predicting the device performances and in particular the power losses under different operating and supply conditions.
Keywords: induction motors, current transducers, rotational fluxes