| 摘要 |
<p>PURPOSE:To obtain the excellent control circuit of the electric rolling stock having a good response, by flowing a preliminary exciting current, performing regenerative braking if the motor current is larger than the specified value, and performing plugging braking if it is smaller than the specified value. CONSTITUTION:When an advance contactor 10 and a backing contactor 9 are switched by an advance and backing switch 20, a regerative contactor throwing circuit 30 for a regeneration contactor 4 is actuated, and the preliminary exciting current is flowed by a circuit 40 comprising a preliminary exciting resistor R0 and the like. A current sensing circuit 50 actates a regenerative braking circuit 60 when a motor currnt sensed by a sensor 8 exceeds the specified value within specified time after the preliminary exciting current has flowed, and actuates a plugging circuit 70 when the motor current does not exceed the specified value. In this constitution, the excellent regerative control circuit of the electric rolling stock having good response can be obtained.</p> |
