Control system of a tractive drive with temperature control of thermally loaded elements

The design of a control system performing the minimization of power losses and temperature checking of a traction electric drive is considered. The transistors and diodes conduction and switching losses and induction motor copper and iron losses are used as losses leading to overheating. It is suggested to use the transistor switching frequency and stator winding current as variables limited by the thermal conditions and power losses. The structures and mathematical description of control system main units are presented. The use of numerical methods for determination of the optimal operating mode is proposed. It is shown that, as a result of use of the proposed system, the reduction in power losses may be increased up to 15% relative to a classical vector control system.