ENERGY-EFFICIENT METHOD OF CONTROLLING ASYNCHRONOUS TRACTION MOTORS CONNECTED IN PARALLEL TO ONE INVERTER Russian patent published in 2016 - IPC B60L15/20 B60L3/10 H02P21/12 H02P27/12 

FIELD: machine building.

SUBSTANCE: invention relates to methods of controlling traction system of vehicles with electric traction. Method of controlling asynchronous traction motor includes calculating current value of electromagnetic torque and stator flux in DTC (Direct Torque Control) unit on engine first carriage axis. Calculation of task for torque supplied to DTC unit is carried out by speed controller using signal of maximum or minimum speed of rotation of parallel-connected asynchronous motors. In traction mode control is performed by maximum, and in braking mode at minimum rotational speed. Task for stator flux linkage $${\psi }_{S_{З}}$$ supplied to DTC unit is defined for given flux depending on flux linkage from task for electromagnetic torque $${\psi }_{S_{З}}=f\left({{\displaystyle M}}_{з}\right)$$ of motor $${{\displaystyle M}}_{з}$$ , pre-calculated from condition of minimum stator current taking into account motor saturation. When engine under stress in first moments of time setting on the flux linkage is defined depending on time.

EFFECT: technical result is providing highly dynamic torque control of traction motors and to prevent slipping and skidding.

1 cl, 1 dwg