Some peculiarities of the simulation of electric drives with random mode loading

The paper considers some features reflected by simulation of electric drives operated in the random load modes. It is shown that the distribution laws for losses and the torque are essentially different. I.e., when modeling random modes of electric drive it is impossible to transfer the distribution law of the motor load, which is characterized by the motor torque, to the motor loss distribution. It is also shown that the value of the standard process deviation can significantly differ from the standard deviation of the amplitudes of this process; the difference can be either downwards or upwards depending on the cyclic duration factor and mathematical expectation of the amplitude. The influence of the torque limitation on probability density functions of load and losses was considered. The distribution law in the absence of the torque limitation and with regard to the impact of these limitations can result in different values of mathematical expectations and variances.