| 摘要 |
Means for detecting operation of a direct-current motor in the reversed or braking mode. Means are provided for receiving signals representative of armature current and of the mark-space conduction ratio of a motor control thyristor A rise in motor current above a predetermined value, coupled with a decline in mark-space ratio below a predetermined value, causes the disclosed circuit to produce an output signal which is utilized to temporarily limit conduction of the motor control thyristor and procure controlled deceleration. |
