유압 트랜스포머를 이용한 유압 실린더의 에너지 절감에 관한 연구

다국어 초록 (Multilingual Abstract)

In order to reduce energy consumption, secondary controlled system has been applied to many types of equipments, In lifting equipments or press machines using hydraulic cylinder, a hydraulic transformer is used as a control component instead of a valve for motion control and a component for recovering potential energy of load. The transformer is a combination of a variable displacement pump/motor as a secondary controlled element and a fixed displacement pump/motor. In this paper the effect of transformer is studied. Multiple closed loop controllers with displacement feedback of variable pump/motor, speed feedback and position feedback of cylinder are used. The efficiency and energy consumption when cylinder is driven up and down is calculated by simulation. Simulation results show that considerable energy saving is achieved by choosing load ratio, circuit type and supply pressure.

참고문헌 (Reference)

1 Nakao, H., "Transformer and its control" 38 (38): 13-18, 1999

2 Kita, Y., "Recommendation of constant pressure system(2)" 25 (25): 46-53, 1995

3 Kita, Y., "Recommendation of constant pressure system(1)" 25 (25): 231-239, 1995

4 Richter, M., "Moderne Antriebskonzepte im Pressenbau" 40 (40): 688-694, 1996

5 Hao, J., "Energy Saving of a Hybrid Vehicle using a Constant Pressure System" 30 (30): 20-27, 1999

6 Ikeo, S., "Cylinder drive with secondary control" 38 (38): 21-24, 1999