Control system of PWM (Pulse Width Modulation) regulating valve

Abstract

The control system comprises a valve, an actuator, a PWM controller and a power source, the actuator is installed on the valve, a valve element of the actuator is connected with an output shaft of the actuator, the PWM controller is connected with the actuator, and the power source is connected with the power source end of the PWM controller. The invention relates to the technical field of valves, in particular to a control system of a PWM regulating valve.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a control system of a PWM regulating valve. BACKGROUND

[0002] In the field of automobiles and hydraulic systems, traditional DC (direct current) valve actuators can only realize constant-speed opening and closing operations, and cannot adjust the speed according to the actual working conditions. In actual applications, such constant-speed operations will bring impact to the hydraulic system due to inertia, thereby damaging other components in the system. For example, when the automobile or hydraulic system performs emergency or soft braking switching, the traditional valve cannot accurately change its variable, and it is difficult to better and more softly meet the high-precision variable demand of the hydraulic system, and cannot effectively avoid the adverse effects of inertia impact.

[0003] With the continuous development of automobile and hydraulic technology, the requirements for the precision and stability of valve control and system protection are increasing, and the existing traditional valve actuators have been unable to meet these demands, and a new type of valve control system capable of realizing speed regulation, reducing inertia impact and meeting high-precision variable control is urgently needed. SUMMARY

[0004] In view of the above, in order to make up for the above-mentioned defects, the present application provides a control system of a PWM regulating valve.

[0005] The control system of the PWM regulating valve provided by the present application comprises a valve, an actuator, a PWM controller and a power supply, the actuator is installed on the valve, and the valve core thereof is connected to the output shaft of the actuator, the PWM controller is connected to the actuator, and the power supply is connected to the power supply end of the PWM controller.

[0006] Further, the PWM controller supports dual-mode input: local parameter setting and remote (computer, mobile phone, Ipad, etc.) communication control.

[0007] Further, the PWM controller has an RS485 interface for controlling the PLC.

[0008] Further, the PWM controller can be extended to connect a pressure sensor, a temperature sensor and a flow sensor for collecting parameter information, realizing intelligent speed regulation opening and closing of the valve according to pressure, temperature and flow, achieving high-precision control, and at the same time reducing the adjustment effect of repeated opening and closing of the valve, prolonging the service life of the valve.

[0009] Further, the power supply is a switching power supply, the input end of which is connected to AC 220V mains, and the output end outputs DC 12V or DC 24V direct current.

[0010] Further, the actuator is a direct current brush motor with a built-in Hall encoder.

[0011] The beneficial effects obtained by the present application are as follows:

[0012] 1、The control system of the PWM regulating valve can realize intelligent speed opening and closing of the valve according to actual working conditions and sampling of pressure, temperature, flow and the like, automatically adjust the opening and closing speed of the valve, effectively reduce the inertial impact of the hydraulic system, reduce the risk of component damage caused by impact, improve the stability and reliability of the entire hydraulic system, reduce the inertial impact and the valve opening and closing frequency, thereby reducing the wear degree of the valve and system components, significantly improving the service life of the valve and the system, and reducing equipment maintenance and replacement costs.

[0013] 2、Two PWM control modes are provided, which can change the opening and closing speed of the valve by setting PWM parameters, and can also implement control parameter variables by 485 communication to PLC, so as to meet the precise control requirements of customers on the hydraulic system, be flexibly applied to different working scenes and control requirements, realize timed speed change (opening or closing) according to requirements, further expand the functional application range of the valve, and provide more control options and convenience. DETAILED DESCRIPTION

[0014] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the embodiments of the present application to explain the present application, and do not constitute a limitation on the present application. In the drawings:

[0015] Fig. 1 is a system block diagram of the control system of the PWM regulating valve of the present application;

[0016] Fig. 2 is a circuit connection block diagram of the control system of the PWM regulating valve of the present application.

[0017] Among them, 1, valve, 2, PWM controller, 3, power supply, 4, actuator. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application; based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "in" and "out" refer to the directions towards or away from the geometric center of a particular component.

[0020] AsFigs. 1-2 As shown, the technical scheme adopted by the present application is as follows: the present application provides a control system of a PWM regulating valve, which comprises a valve 1, an actuator 4, a PWM controller 2 and a power supply 3. The actuator 4 is installed on the valve 1, and the valve core thereof is connected to the output shaft of the actuator 4. The actuator 4 is a direct current brush motor with a built-in Hall encoder. The PWM controller 2 is connected to the actuator 4. The power supply 3 is connected to the power supply 3 end of the PWM controller 2. The power supply 3 is a switching power supply 3, the input end of which is connected to AC 220V mains, and the output end outputs DC 12V or DC 24V direct current.

[0021] The PWM controller 2 supports dual-mode input: local parameter setting and remote (computer, mobile phone, Ipad, etc.) communication control. The PWM controller 2 has an RS485 interface for control of PLC. The PWM controller 2 can be extended to be connected to a pressure sensor, a temperature sensor and a flow sensor for collection of parameter information, so as to realize intelligent speed regulation of the valve 1 according to pressure, temperature and flow, achieve high-precision control, and at the same time, reduce the adjustment effect of repeated opening and closing of the valve 1, and prolong the service life of the valve.

[0022] In specific use, the power supply 3 (DC 12V or 24V) is connected to the PWM controller 2, ensuring firm connection and correct polarity. Then, the PWM controller 2 is connected to the actuator 4 to form a complete circuit. If control of PLC through 485 communication is required, the 485 communication line between the PWM controller 2 and the PLC needs to be correctly connected.

[0023] If the PWM parameter setting is used to change the opening and closing speed of the valve 1, a corresponding setting tool (such as a matching software or an operation panel) needs to be used. According to the actual working condition requirement, the PWM parameter value (such as duty ratio) is input or adjusted to determine the opening and closing speed of the valve 1.

[0024] When control of PLC through 485 communication is implemented, a corresponding control program is written in the PLC. According to the actual working condition and control requirement, a control instruction is sent to the PWM controller 2 to realize adjustment of the opening and closing speed of the valve 1 by changing the parameter variable of the PWM controller 2.

[0025] During system operation, when the pressure, temperature, flow and other sensors collect corresponding parameter information, the information is fed back to the PWM controller 2. The PWM controller 2 automatically adjusts the opening and closing speed of the valve 1 according to the preset rules and algorithms, so as to realize intelligent speed regulation of the valve 1 and adapt to the actual requirement of the hydraulic system.

[0026] If there is a requirement of timed speed change (opening or closing), a corresponding setting interface or programming mode can be used to set specific time nodes and corresponding valve opening and closing speed parameters, so that the valve works according to the preset time and speed requirement.

[0027] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting, since the scope of the present application will be limited only by the appended claims. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be apparent to one of ordinary skill in the art that many embodiments of the application can be made without departing from the spirit or scope of the application. Numerous specific details are described in order to provide a thorough understanding of the embodiments of the application. However, it will be apparent to one of ordinary skill in the art that embodiments of the present application can be practiced without many of these specific details. In other instances, well-known methods, procedures and components have not been described in detail so as not to unnecessarily obscure aspects of the embodiments of the application. In an effort to provide a concise description of the embodiments of the application, the terms "a", "an" and "the" are used for singular aspects of the application, however, it should be understood that the articles "a", "an" and "the" are intended to be inclusive of the plural aspects of the application. It is intended that the application not be limited to the embodiments described herein, but that it include all embodiments falling within the scope of the appended claims. It is also to be understood that the use of relational terms such as first and second, and the like, do not denote a physical or chronological precedence or relationship among the disclosed components. The terms "first" and "second" are used only to distinguish a different single embodiment from another, but do not imply any physical or chronological precedence or relationship. Furthermore, the terms "comprise", "comprises", "comprising", "include", "includes", "including" and the like are used synonymously with the term "containing" or "containing".

[0028] While the application has been illustrated and described in detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character, since the scope of the application is indicated by the appended claims, along with their equivalent scope in their equivalents.

Claims

1. A control system for a PWM regulating valve, characterized in that: It includes a valve (1), an actuator (4), a PWM controller (2) and a power supply (3). The actuator (4) is mounted on the valve (1) and its valve core is connected to the output shaft of the actuator (4). The PWM controller (2) is connected to the actuator (4), and the power supply (3) is connected to the power supply (3) terminal of the PWM controller (2).

2. The control system for a PWM regulating valve according to claim 1, characterized in that: The PWM controller (2) supports dual-mode input: local parameter setting and remote (computer, mobile phone, I-Pie, etc.) communication control.

3. The control system for a PWM regulating valve according to claim 2, characterized in that: The PWM controller (2) has an RS485 interface, which is connected to the PLC for control.

4. The control system for a PWM regulating valve according to claim 3, characterized in that: The PWM controller (2) can be extended to connect pressure sensor, temperature sensor and flow sensor to collect parameter information and realize intelligent speed adjustment of valve (1) according to pressure, temperature, flow and other factors to achieve high precision control. At the same time, it can also reduce the unnecessary repeated opening and closing adjustment of valve (1) and extend the service life of valve.

5. The control system for a PWM regulating valve according to claim 4, characterized in that: The power supply (3) is a switching power supply (3), whose input terminal is connected to AC220V mains power and whose output terminal outputs DC12V or DC24V direct current.

6. The control system for a PWM regulating valve according to claim 5, characterized in that: The actuator (4) is a DC brushed motor with a built-in Hall encoder.

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