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