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在节能至上的时代液压传动应用雄风依然

(2014-05-04 08:15:48)
标签:

rmc150

rmc75

运动控制

液压传动

美国delta

分类: 美国DELTA

在节能至上的时代液压传动应用雄风依然

Fluid Power Is Alive & Well in the Era of Energy Conservation

Peter Nachtwey

Contrary to what some people think, fluid power systems are capable of very high-performance motion control. And a well-designed, closed-loop hydraulic actuator can do things that motors can't do economically and reliably, such as positioning very heavy loads with a 10-micron resolution or better. Furthermore, oil pressure can be stored easily for use when power demand is high.

Pumps in fluid power systems can be sized to meet the needs of average loads, whereas electric motors that drive motion axes directly must be sized to handle the maximum loads that the system must handle. Plus, a single fluid pump can serve many actuators, whereas each motion axis in a motor-driven system must typically be powered by its own motor.

However, gaining the benefits requires close attention to good system design principles. Fast, precise motion requires a controller with specialized fluid power capabilities. A well-designed hydraulic system, with components that are selected for precision and sized correctly, is equally important. For example, old two-position bang-bang valves should be replaced by servo-quality proportional valves that can make smooth and precise changes to oil flow. This allows trial-and-error tuning of systems to be replaced or augmented by the use of automated tuning tools that can optimize system performance and reduce energy waste.

Peter Nachtwey is president of Delta Computer Systems Inc.

转自:

http://www.designnews.com/author.asp?section_id=1365&doc_id=273018

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