Features of electric drive simulation at random loading

Some features of the simulation of electric drives, working at random loading are considered in the article. It is shown that during the simulation of the electric drive at random modes it is impossible to transfer the motor load distribution law, which is characterized by the motor torque, onto the motor losses distribution law. It is also shown that the value of variance for the loading process may be significantly different from the variance for the amplitudes of this process, the difference can be either positive or negative depending on the cyclic duration factor and the mathematical expectation of the amplitude. The influence of the torque limitation on probability density functions of load and losses was considered. It was shown that the distribution law in the absence of torque limitation and the one accounting for the impact of this limitation are is two different laws, which, in the general case, have different mathematical expectation and variance values.