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Control method and device of proportional solenoid and engineering machinery using device

A proportional solenoid valve and control method technology, applied in the field of machinery, can solve problems such as reducing the accuracy and reliability of system action, and achieve the effect of improving the accuracy and reliability of action and eliminating individual differences

Active Publication Date: 2010-06-02
益阳市科技成果转化服务中心 +1
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Problems solved by technology

[0005] In the existing technology, constant current control is adopted for systems with dynamically changing workloads. The given current in this method is determined according to the characteristic curve of the proportional solenoid valve, but the solenoid valve has individual differences, such as coil impedance, action stroke, etc. , so the characteristic curve of each solenoid valve is not necessarily the same, and the characteristic curve of the solenoid valve will also change a small amount over time, thus reducing the accuracy and reliability of the system action

Method used

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  • Control method and device of proportional solenoid and engineering machinery using device
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  • Control method and device of proportional solenoid and engineering machinery using device

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Embodiment Construction

[0054] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all implementation examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0055] As mentioned in the background technology, the commonly used proportional solenoid valve control method in construction machinery is PWM, that is, an adjustable pulse signal is added to both ends of the proportional solenoid valve coil, and the coil current is changed by adjusting the pulse width to achieve the purpose of controlling the actuator. . When controlling the coil current (actual working current), first set the given working current (that is, the re...

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Abstract

The embodiment of the invention discloses a control method and device of a proportional solenoid and engineering machinery using the device. The method comprises the step of judging the current mode, and if the current mode is a self-learning mode, outputting the given working current to the proportional solenoid, and acquiring the corresponding relation according to the given working current; and if the current mode is a working mode, according to the given signal and the corresponding relation, outputting the pulse width to the proportional solenoid to modulate the PWM value. The invention improves the accuracy and the reliability of the system action.

Description

technical field [0001] The invention relates to the technical field of machinery, in particular to a method and device for adaptive control of a proportional solenoid valve and construction machinery using the device. Background technique [0002] Proportional solenoid valves are widely used in construction machinery. The commonly used control method is PWM (pulse width adjustment), that is, an adjustable pulse signal is added to both ends of the proportional solenoid valve coil, and the coil current is changed by adjusting the pulse width to achieve control execution. The purpose of the component. In the actual construction process, due to changes in temperature (the impedance of the coil changes with temperature) and voltage (the operating voltage is related to the number of electrical appliances that are turned on), the same PWM (Pulse Width Modulation, pulse width modulation) value, the actual proportional solenoid valve The current may vary, resulting in inaccurate act...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/06
Inventor 胡宏秋肖峰李建科
Owner 益阳市科技成果转化服务中心
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