Models of icebreaker electric propulsion systems with asynchronous motors and three-level converters

Describes mathematical models of electric propulsion systems for icebreakers with asynchronous motors and three-level converters, taking into account thermal processes in transistor modules. With the help of these models, calculations were made for the main operating modes of the icebreaker – nominal, operation with overload and when the propeller is jammed, while determining the temperature distribution in the inverter modules. With a decrease in the frequency of the output voltage of the converter, temperature fluctuations in transistor modules increase, leading to their destruction. In order to reduce the maximum temperatures of the modules, it is proposed to increase the value of the main flux of the propulsion motor.

Authors: A. G. Vorontsov, M. V. Pronin

Direction: Electrical Engineering

Keywords: electric propulsion system, icebreaker, transistor 3-level frequency converters, propeller jamming, temperature distribution in a three-level converter

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