| 摘要 |
<p>PURPOSE:To provide sufficient rapid responsiveness against disturbance such as variations in the voltage of a trolley wire by adding a feed forward controller which obtains a feed forward conduction rate from a filter capacitor voltage, a field current, a motor rotating speed and an armature current command value. CONSTITUTION:A feedback controller 13 outputs a feedback conduction rate alpha2 in response to a deviation DELTAI between an armature current command value IC and an armature current IA. A damping controller 14 outputs a damping conduction rate alpha3 in response to a difference between a signal differentiated from a filter capacitor voltage EC and a signal differentiated from an armature current IC. A feed forward controller 12 obtains a feed forward conduction rate alpha1 from a field current IF, a motor rotating speed VLC, the armature current command value IC, and the filter capacitor voltage EC. The conduction rates alpha1-alpha3 are added to obtain an armature chopper conduction rate alpha.</p> |
