Automation of the three-phase double-speed asynchronous motor design

The subject of research is double-speed asynchronous motors of the type produced by SPA ELSIB PJSC with two independent windings in the stator designed to drive the main circulating pumps of nuclear power plants as well as similar mechanisms in other sectors of the national economy. The article deals with specific issues of the full cycle of calculating the considered electric ma-chine. We propose a method of research on mutual influence of stator windings when the motor works based on the fundamental positions of the theory of electrical machines using numerical modeling. Also, a method of choosing an air cooler to be used in thermal calculation taking into account the features of the machine type under investigation is proposed. The research purpose is to optimize the full cycle of calculating a new motor of this type under development. This is due to the occurrence of additional heating in one stator winding due to the operation of the other, which increases labor costs caused by the need to take into account an additional heat source during thermal calculation. In addi-tion, the existing empirical dependencies do not fully reflect the entire physical picture of the ongoing processes. The originality of the research lies in the fact that based on the known provisions the algo-rithm for calculating the applied air cooler has been modified due to automation, which contributes to correct protection against thermal overheating effects. It is shown that by numerical modeling it is possible to minimize labor costs for determining the parameters taken into account in the subsequent thermal calculation that arise as a result of the mutual influence of the selected machine type stator windings. The research results are tried out in SPA ELSIB PJSC manufacture and presented by the motor specific example.