CONTROLLER OF ELECTRIC RAILCAR

摘要

PURPOSE:To obtain a controller which has fast response of reducing an armature current by separately providing a step control system of an armature side output voltage and a control system of a field rate step. CONSTITUTION:A field side step controller 2 outputs a step of indicating a full field and stops until an armature side output voltage step controller 1 indicates the armature side output voltage maximum step. When the controller 1 outputs a step of instructing the maximum armature side output voltage, the controller 2 starts advancing the stage in the direction of weakening the field. When an overcurrent of an armature current is detected due to an abrupt rise of a trolley wire voltage during the weak field operation, a comand for advancing the step in reverse direction is applied to the controllers 1 and 2. When the step of the armature side is advanced in reverse direction, the response of reducing the armature current can be accelerated.