Ecological Systems and Devices Annotation << Back Finite Element Model for Research Magnetic Noise of Electrical Machines Ermolaev A.I., Plekhov A.S. The article is devoted to the study of the magnetic noise of an alternating current electric machine – an asynchronous electric motor as part of an adjustable electric drive. In modern adjustable electric drives, the power source for the IM is a frequency converter, made using a transformerless circuit with pulse width modulation. The relevance of the study is justifi ed by the need to limit vibration and noise in industrial and agricultural premises to acceptable levels in order to prevent harm to the health of service personnel, reduce the productivity of farm animals and the service life of technological equipment with electric drives. As part of the ongoing research, the main factors in the occurrence of vibration and magnetic noise have been established, due to the harmonic composition of the voltage supplying asynchronous motors, technological errors in the manufacture of motors and the modes of their operation with working machines. The object of study is a model of an asynchronous electric motor with a squirrel cage rotor, which was developed in the COMSOL Multiphysics multiphysics fi nite element design environment. Numerical model of an induction motor in COMSOL Multiphysics driven by the output voltage of a frequency converter. The stator magnetic fi eld of a given harmonic composition is formed by blocks that are imported from a SPICE Circuit Netlist (.cir) fi le containing a display of the frequency converter circuit diagram. The obtained results contain the developed geometry of the model, identical pairs of interacting modules in the model, modules of the rotating region, calculation of the rotor moment of inertia, magnetic forces causing stator deformation and vibrationdisturbing pulsating acoustic pressure. The proposed method of comparing simulation results using a fi nite element model and the results of dynamic simulation modeling of an engine in transient modes allows us to assert the acceptable quality of the development. The fi nite element model makes it possible to calculate the useful mechanical power and vibration power acting in an electric machine at different levels of physical fi elds for an electric drive. Keywords: induction motor, magnetic noise, frequency converter, finite element model. DOI: 10.25791/esip.12.2024.1494 Pp. 39-50.