METHOD OF CONTROLLING INDUCTION TRACTION MOTORS CONNECTED IN PARALLEL TO SINGLE INVERTER

摘要

FIELD: transport.;SUBSTANCE: invention relates to railroad vehicles and may be used at rolling stock with induction traction motors. Proposed method comprises calculating current electromagnetic moment and stator flux linkage in Direct Torque Control unit for first motor. Moment calculation is carried out by rpm controller using maximum or minimum rpm of induction motors connected in parallel. In traction mode, control is performed by maximum rpm. In braking mode, control is performed by minimum rpm. Setting for stator flux linkage Ψs₃ is defined in upper level control system by formula Ψs₃=f(ω_mean), where ω_mean is motor mean rpm, or locomotive speed reduced to motor shaft.;EFFECT: optimum motor moment control, preventing slip and skid.;2 dwg