Electro-hydraulic valve coil drive techniques and their effects on valve performance

摘要

The mobile hydraulic market is increasing its use of electronics for hydraulic control systems. In order to be more cost competitive, these systems are beginning to use proportional electro-hydraulic valves as opposed to the more traditional and costly servo valves. Proportional valves may be operated in open loop fashion or in a closed loop fashion which includes feedback transducers. In either case, it is important for the system designer and ultimately the end user to understand the different types of performance that may result by utilizing various coil drive strategies with proportional control valves.