Method of determining additional thermal losses in the windings of electric motors

Abstract

Increasing the energy efficiency of asynchronous electric drives plays an important role in development of electrical engineering and power engineering [1, 2]. Increasing the efficiency of asynchronous electric drives is associated with an increase in the number of poles, a decrease in current resistances, and an increase in power coefficients. Also, to achieve the maximum efficiency of asynchronous motors, they should be used at full load (variable load). Frequency converters, most commonly used to control the speed and torque of asynchronous motors, operate using pulse-width modulation of sinusoidal or spatial vectors.