| 摘要 |
FIELD: railway rolling stock. SUBSTANCE: adjustment of driving and/or braking force of traction motors of self-propelled railway rolling stock at maximum value of cohesion between wheels and rails implies transfer to unstable zone of slipping which is determined by increased acceleration of wheel rotation and return of stable zone of slipping by reducing the value of driving or correspondingly braking force and again repeated reduction of driving or braking force. For device operating with integrator 13 used as running pseudo axle, difference of rotation frequency (f) is created with the help of rotation frequency (ΔW) of driving axle and dealt with as wheel slipping measure. By means of differential device 22 and first derivative in time of rotation frequency difference (dΔn/dt), determined is the transfer to unstable zone of slipping. At operation of limiting step 43, connected to integrator 13 is additional input value which counteracts given value before return to stable zone of slipping. To prevent loss of traction force due to operating conditions because of momentary loss of cohesive force it is recommended in addition to reduction of driving or respectively braking force to further reduce rotation frequency. EFFECT: high efficiency. |
