| 摘要 |
<p>PURPOSE:To perform the adhesion performance of an electric railcar to the maximum limit by dividing an intrinsic vibration frequency component by railcar speed and controlling the tension force of a motor so that the utilized signal becomes constant. CONSTITUTION:A digital filter DF extracts the intrinsic vibration frequency from the output of a torque sensor TS. A divider RA divides the output from the filt er DR by the output from a tachometer generator TG, and digitizes it. A creep controller SC outputs a control signal for controlling the creepage amount in respone to the difference between the allowable maximum amplitude reference AS untized from the intrinsic vibration frequency component and the output from the divider RA. An amplifier AMP inputs a creep control signal, an acceleration current command IP and a main motor current IM, and outputs a gate signal to a chopper CH.</p> |
