CONTROL SYSTEM FOR ELECTRIC RAILWAY CAR

摘要

PURPOSE:To suppress the changing rate of input current at a low rate when the high speed notch is reset in an electric rolling stock by a method wherein a circuit to limit rising of output with time is provided in an output circuit of power running control system to command the current flow rate. CONSTITUTION:An amplifier Amp1 outputs a current flow rate signal gamma corresponding to deviation between a current pattern signal IP and the main motor current IM. When the current flow rate signal gamma exceeds the set notch pattern being selected by contacts B1-B4 to perform make and break action corresponding to respective notches, an amplifier Amp2 make the deviation signal thereof to be inputted to the amplifier Amp1 with negative polarity. When the current flow rate signal gamma exceeds the output of an integrator IT which start operation from the initial value 0 in accordance with a power running command P, an acceleration limiter Amp3 makes the deviation signal thereof to be inputted to the amplifier Amp1 with negative polarity. Accordingly the changing rate of input current when the high speed notch is reset can be suppressed at the low rate.