from 01.01.2018 until now
Petersburg State Transport University (Electric Power Traction, Magister's student)
student from 01.01.2023 until now
Saint Petersburg, St. Petersburg, Russian Federation
Purpose: theoretical calculation of parasitic capacitances in an asynchronous motor with variably-frequency drives in order to create a simulation model. Methods: application of electrical engineering principles to calculate the capacitance of planar and cylindrical capacitors and the structural characteristics of the asynchronous motor for computing the ideal equivalent of the motor’s parasitic capacitances. Results: a parasitic-capacitance equivalent circuit of the induction motor is proposed, parasitic capacitances of the asynchronous motor are identified and replaced with ideal equivalent, methods for calculating the ideal equivalents of the parasitic capacitances of the traction asynchronous motor are proposed, and a simplified method for estimating the capacitance of a ball radial bearing based on the Hertzian contact area is presented. Comparisons are performed between data obtained theoretically, data obtained from measurement, and data from various sources. The purposed methods are simple to compute and provide satisfactory accuracy. Practical significance: theoretical calculation result are used in the motor’s equivalent circuit when building a traction drive model in the Simulink simulation environment to assess the magnitude of the voltage applied to the bearing and the current flowing through it, to determinate the potential path of high-frequency current through the bearings of a traction asynchronous motor, with the aim of developing further measures to reduce their influence and improve the reliability of the traction asynchronous motor bearing assembly.
asynchronous motor, common-mode voltage, equivalent circuit, parasitic capacitance, bearing, bearing current
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15. The Effects of PWM Voltage Source Inverters on the Mechanical Performance of Rolling Bearings / D. F. Busse [et al.] // IEEE Transactions on Industry Applications, March/April 1997. Vol. 33, no. 2. Pp. 567– 576. URL: https://www.academia.edu/85626258/The_ effects_of_PWM_voltage_source_inverters_on_the_ mechanical_performance_of_rolling_bearings (data obrascheniya: 11.01.2026).
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17. Bearing Damage Analysis by Calculation of Capacitive Coupling Between Inner and Outer Races of a Ball Bearing / J. Adabi [et al.] // 13th International Power Electronics and Motion Control Conference. Poznan, Poland, 2008. Pp. 903–907. URL: https://www. researchgate.net/publication/224331398_Bearing_ Damage_Analysis_by_Calculation_of_Capacitive Coupling_between_Inner_and_Outer_Races_of_a_ Ball_Bearing (data obrascheniya: 11.01.2026).
18. Binder A., Magdun O., Gemeinder Y. Calculation of Parasitic High Frequency Currents in Inverter-Fed AS Machines. URL: https://www.ew.tu-darmstadt.de/ media/ew/rd/ew_vortraege/100205_binder_magdun_ gemeinder.pdf (data obrascheniya: 12.01.2026).
