AN ELECTRO-HYDRAULIC PROPORTIONAL FLOW VALVE SPEED REGULATING CONTROL SYSTEM AND ITS METHOD

摘要

E-rate control system for hydraulic proportional flow control valve, PWM control, electro-hydraulic proportional flow valves, hydraulic performing element, speed measurement module, the electronic-hydraulic proportional flow valve characteristic comprises a measuring module and a feed-forward control module. The speed measurement module to measure the speed of the hydraulic elements do, that the measurement result e - send to the hydraulic proportional flow valve characteristic measuring module. The electro-hydraulic proportional flow valve characteristic measuring module E - by measuring the minimum operating current and the maximum operating current and the maximum speed of the hydraulic component of the hydraulic proportional flow valve do enter these measurement results in feed-forward control module. The feed-forward control module sets the corresponding relationship between the speed and the valve core current of the hydraulic elements perform using these measurement results, an e-value corresponding to the specified speed, based on the correspondence relationship in order to drive the hydraulic proportional flow valve and to enter the valve core current value of the PWM control device.