| 摘要 |
PURPOSE:To protect a locked motor and a motor circuit against overcurrent and to automatically reset quickly from protected state when the motor is unlocked. CONSTITUTION:When motor current exceeds a predetermined level, failure of a control circuit is detected and if the control circuit is normal, the control is branched to protective mode. Under the protective mode, control output is lowered thus lowering the motor current. If the motor is unlocked when the control is being branched to protective mode and the control signal is lowered or when a drive command is fed reversely to the locking direction, the control is reset from the protective mode. |
