CALCULATION OF THE STRAY MAGNETIC FIELD IN THE END-WINDING SECTION OF AN ASYNCHRONOUS MOTOR

Abstract

This article addresses the calculation of the stray magneticfield in the
end-winding section of the rotor winding of a squirrel-cage asynchronous motor
for general industrial use and its comparison with results obtained through a
simulation model. The subject of the research is the stray magneticfield, while
the focus lies on its mathematical modeling and correlation with experimental
data. The relevance of the study stems from the importance of early diagnostics
in the operational condition of asynchronous motors. The main objective is to
determine variations in the rotor end-winding stray magnetic �ield and to develop
a highly accurate model. The research methodology includes mathematical
modeling using an orthogonal coordinate system (dq) in MATLAB Simulink, along
with experimental measurements. Results indicate that the average deviation in
the magnetic flux amplitude in the air gap between the model and experimental
findings is 4.37%, confirming the adequacy of the developed model. Practitioners
can practically apply the findings in the development of diagnostic tools, specifically
for detecting bearing failures and phase loss. In conclusion, the proposed device
and modeling approach enhance the diagnostic capabilities for assessing the
operational state of asynchronous motors.