| 摘要 |
PURPOSE:To increase an inspection target for detecting an abnormality before rotating a DC motor with a simple configuration. CONSTITUTION:A motor control circuit is constituted of a driving motor 1, a regeneration contactor 2, a battery 3, forward/backward advance contactors 4 and 5, and a motor control transistor 6. A regeneration current sensor 13 for detecting current 12 flowing to a regeneration resistor R1 is connected in series to a regeneration transistor 11 which is connected in parallel with an armature la of the driving motor 1. A control device 12 turns on the regeneration contactor 11, performs ON/OFF control by selecting the forward/backward advance contactors 4 and 5, the motor control transistor 6, and the regeneration transistor 11, and then detects whether the regeneration contactor 2, the forward/backward advance contactors 4 and 5, the motor control transistor 6, the regeneration transistor 11, and the regeneration resistor R1 are normal or not based on the current 12 flowing to the regeneration resistor R1 at that time. |
