Method for improving the control accuracy of electric valve actuator opening degree
A technology for controlling precision and valve opening, applied in valve devices, engine components, mechanical equipment, etc., can solve the problems of high driving motor cost, unfavorable product field adaptability, complex driving control, etc., to achieve low cost and overcome the opening degree. The effect of control error and high control precision
Active Publication Date: 2019-01-29
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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However, this method needs to be equipped with a drive motor with frequency conversion and speed regulation function, and the drive motor with frequency conversion and speed regulation function is costly, and the drive control is complicated, which is not conducive to the field adaptability of the product
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[0013] figure 1 It is a flow chart of the present invention, as shown in the figure: the method for improving the opening control accuracy of an electric valve actuator in this embodiment includes the following steps:
[0014] S1. Operate the actuator back and forth from open to close once to obtain the inertia value △P of the valve rotation;
[0015] S2. The actuator collects the current valve opening in real time, and sends the current opening value P 0 and the preset target opening value P in the actuator 1 Compare;
[0016] S3. When the target opening value P 1 and the current opening value P 0 When the absolute value of the difference between is equal to the inertia value △P, that is, P 0 =|P 1 -△P︱, the actuator executes the stop command, cuts off the power supply of the drive motor, and the valve stops at the target opening value P after continuing to rotate the inertia value △P due to inertia 1 , to achieve precise control of the opening; otherwise, return to st...
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The invention discloses a method for improving the open degree control accuracy of an electric valve actuator. The method comprises the following steps: S1, switching on and off the actuator back and forth once, to obtain an inertia value deltaP of rotation of a valve; S2, acquiring, by the actuator, the open degree of the current valve in real time, and comparing the current open degree value P0 with a preset target open degree value P1 in the actuator; S3, when an absolute value of a difference value between the target open degree value P1 and the current open degree value P0 is equal to the inertia value deltaP, i.e. P0=|P1-deltaP|, and carrying out a stop command by the actuator, cutting off the power of a driving motor, wherein after continuously rotating the inertia value deltaP due to inertia, the valve stops at the target open degree value P1, so that accurate control of the open degree is realized; and if the absolute value is not equal to the inertia value deltaP, returning to the step S2. The method has the advantages of high control accuracy, low cost and flexible mode.
Description
technical field [0001] The invention relates to the field of instrumentation control, in particular to a method for improving the control accuracy of the opening of an electric valve actuator. Background technique [0002] The difficulty of precise control of the opening of the valve electric device is mainly the influence of the inertia of the drive motor and the transmission gear. How to eliminate or overcome the inertia of the action is the key to improving the control accuracy. At present, the opening control of the electric valve actuator is mainly realized by controlling the rotation speed of the motor, that is, when the valve is about to reach the set opening degree, the inertia of the valve action is reduced by reducing the speed of the motor, thereby reducing the control error. However, this method needs to be equipped with a drive motor with frequency conversion speed regulation function, and the drive motor with frequency conversion speed regulation function has h...
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IPC IPC(8): F16K37/00
CPCF16K37/0025
Inventor 谭飞王璇谭凯李涛柏思忠胡超饶兴鑫王祖迅罗前刚张宇路萍秦泰万勇叶文韬黄倩田炎鑫郑芳菲
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD