| 摘要 |
PURPOSE:To prevent current value and lubricant temperature after cooling a clutch from exceeding limit values to accelerate rapidly a load to a set speed by limitting drive current for a motor while controlling lubricant temperature after cooling a clutch. CONSTITUTION:An input current detector 1a is provided at the side of voltage applied to a motor 1. A temperature detector 2a is provided at the outlet side of clutch lubricating oil of a slipping clutch 2. A rotational speed detector 1d takes out the rotational speed of an output shaft 1c for driving a load 3 through the variable speed slipping clutch 2 from the motor 1. To a min. value selector 7 are given the respective output signals of a current comparator 4, a temperature comparator 5 and a speed change comparator 6 to be compared with each other. The lowest signal value among these signals is taken out so that voltage signal is once converted to current signal by a V/I output circuit 8 and sent to an electricity-hydraulic pressure converter to control the clutch operating hydraulic pressure through a clutch hydraulic pressure controlling valve 9a. |
