A prototype of a fast switching valve designed for a digital hydraulic transmission has been manufactured and experimentally tested. The valve is an annular seat valve composed of a plunger connected with a direct electromagnetic moving coil actuator as the force producing element. Based on an elaborate optimization method the valve is designed to maximize the efficiency of a digital hydraulic motor targeted to a wind turbine transmission system. The optimisation method comprises a mathematical framework which predicts a valve switching time of approximately 1 ms with a peak actuator input power of 10 kW during switching (mean of approximately 250 W) and a pressure loss below 0.5 bar at 600 l/min. The main goal of this article is validate parts of the mathematical framework based on a series of experiments. Furthermore, this article aims to document the experience gained from the experimental work and to study and assess a moving coil actuators suitability for the application.
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机译：设计制造用于数字液压传动的快速切换阀的原型并进行了实验测试。该阀是一个环形座阀，由一个柱塞构成，该柱塞与一个直接电磁移动线圈致动器相连，作为作动力元件。基于精心设计的优化方法，将阀门设计为最大化针对风力涡轮机传动系统的数字液压马达的效率。该优化方法包括一个数学框架，该数学框架在切换期间以10 kW的峰值执行器输入功率（平均约为250 W）和600 l / min的压力损失低于0.5 bar的情况预测阀门的切换时间约为1 ms。本文的主要目标是基于一系列实验来验证数学框架的各个部分。此外，本文旨在记录从实验工作中获得的经验，并研究和评估适用于该应用的动圈式执行器。
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