UN SISTEMA DE CONTROL PARA VEHICULOS DE MOTOR ELECTRICO

摘要

PURPOSE:To obtain high viscous performance irrespective of an electric railcar speed by controlling the tensile force of a motor so that the intrinsic vibrating frequency component of a unitized axle becomes constant within an allowable range. CONSTITUTION:A digital filter DF produces only an intrinsic vibrating frequency component as a slip predriving phenomenon of a twisting vibration detected by a shaft torque sensor TS. A unitizing circuit RA unitizes an output signal level from the filter DF by the signal level of the entirety. A comparator CPR compares a unitized allowable amplitude reference AS with an output from the circuit RA, and outputs a creep control signal. An amplifier AMP outputs a gate signal to a chopper CH in response to the creep control signal, an acceleration current command IP and a main motor current IM.