FIELD: railway transport. SUBSTANCE: in control of driving and/or braking effort of traction electric motors in wheel-rail boundary adhesion area, transfer to unstable slipping zone is determined by higher wheel rotation acceleration, and return to stable slipping zone is provided by reduction of value of driving and, respectively, braking effort. If integrator is used as free (runner) pseudoaxle, rotational speed difference Δn is formed by means of driving axle considered as wheel slip measure. Transfer into unstable slipping zone is fixed by first rotational speed differential derivative dΔn/dt. In case of operation of maximum stage, additional input value is applied to integrator which counteracts introduced preset value to provide return to stable slipping zone. To prevent traction force losses caused by instantaneous loss of adhesion it is recommended to carry out reduction depending on maximum obtained value of first derivative Δn in addition to reduction of driving or corresponding braking effort contributing to evaluation of difference of rotational speed dΔn/dt. EFFECT: enhanced reliability of control. 2 cl, 1 dwg
