With the rapid development of power electronics technology and the self-control valve industry, electric valve actuators are developing rapidly. Electronic computer technology and microcomputer control technology have been widely applied in the design of self-control valves. These intelligent electric valve actuators are powerful, simple, and reliable. Below is an introduction to the development trend of electric valve actuators.

The rapid development of computer technology and communication technology has accelerated the development of electric valve actuators, and the split structure will also replace mechatronics integration; The control accuracy will be increasingly high and the usage environment will be wider; More powerful functions and higher reliability to meet the constantly evolving requirements of automatic control.

In the past decade, automation engineering technology has made significant progress. As one of the automation instruments in automatic control, electric valve actuators should also have standard serial communication interfaces and dedicated local area network interfaces to adapt to this development trend, in order to enhance their interconnection ability with other control equipment. With just one cable or optical cable, several devices can be connected Even hundreds of electric valve actuators are connected to the upper computer to form the entire CNC system. Fieldbus is a serial, digital, and multi-point communication data bus installed between field equipment/instruments in the production process area and automatic control devices/systems in the control room. As the future development direction of control systems, the fieldbus enterprise network, with its advantages such as openness and networking, makes it possible to combine with Internet. The application of fieldbus technology in electric actuators has become an inevitable trend. The application of fieldbus technology has replaced traditional 4-20mA analog signals, realizing remote monitoring of electric actuators, transmitting status, fault, and parameter information, completing remote parameterization work, improving its reliability, and reducing system and engineering costs. Currently, intelligent electric actuators abroad generally have fieldbus interfaces, and China has also developed some intelligent actuators with fieldbus interfaces.

Intelligence is the current trend in all industrial control equipment, as well as the development trend of electric valve actuators. Low priced microcontrollers and new high-speed microprocessors will comprehensively replace analog electronic devices as the main control unit of electric valve actuators, thus achieving a completely digital control system. The implementation of fully digital control has transformed the original control of electrical components into software control, allowing for the application of intelligent algorithms from modern control theory in electric valve actuators. Examples include optimal control, artificial intelligence, fuzzy control, neural networks, etc. to improve valve control performance. Traditional electric valve actuators are generally regarded as linear systems, consisting of amplification and integration links. In fact, the majority of valve actuator parameters will significantly change during operation. Applying parameter scheduling and model identification adaptive control will greatly improve the control performance of electric valve actuators. Compared to pneumatic and hydraulic valve actuators, intelligent electric valve actuators with simple wiring, powerful functions, and reliable use will continue to expand their application scope.

The high integration of power electronics, the use of microcontrollers, and the use of multifunctional and powerful integrated modules have led to the development of smaller and more lightweight electric valve actuators. At present, intelligent electric valve actuators are installed on regulating valves, globe valves, gate valves, ball valves, and butterfly valves, integrating other on-site control instrument controllers. The integration of electric actuators simplifies the installation and debugging work of the actuators; Installing the entire control circuit in a field instrument reduces the impact of factors such as leakage and interference in signal transmission on the system, and improves the reliability of the system. The miniaturization of electric valve actuators will greatly save installation space and difficulty, and also facilitate centralized control of large-scale control instruments.