| 摘要 |
<p>PURPOSE:To accelerate the rise of a regenerative brake current by judging the speed by the state at a power drive time to prepare a brake circuit. CONSTITUTION:A range of (1) in the graph is a power drive resistance control stage. When main resistors MR1, MR2 are all shortcircuited, a railcar enters a field range of (2), and a field current is regulated by field controllers 3a, 3b. The range (3) of a brake control is parallel stage. When a speed is decelerated, the connection is switched to the series stage of (4), and when the speed is further decelerated, it is shifted to a pneumatic brake range (5). In this case, when a notch is turned OFF in the power drive parallel stage, the circuit is prepared to engage the series generative brake to become a power drive final stage, and when a field current becomes the predetermined prescribed value of lower, the circuit is prepared to engage the parallel regenerative brake.</p> |
