The Research Of Electric Actuator Of Valve Based On Srm

Electric actuator of valve is widely used in modern industry, and the controller is the core of the whole system. With the surge of foreign actuators rushing into China, it is necessary to develop products with independent copyright. With the analysis of the need of the products, an intelligent controller of a new motor is studied and a digital, intelligent, self-diagnosing actuator with field bus based on the former electric actuator is developed, which shorten the gap with the foreign actuators and will be a great benefit to our society.The key part of the paper is to develop a new kind of intelligent controller of valve actuator, using the switched reluctance motor as electric actuator, which is composed by a main controller, a detection circuit, a human-machine interface and a drive circuit of motor.The work capability of SRM is mainly analyzed. The control mode is researched when the electric actuator of valve start and work. With the analysis of the use of the absolute value encoder in the control of SRM and the valve, a kind of absolute value encoder used in angle position control of SRM. Part of hardware of intelligent electric actuator controller is designed and controller software is compiled using C8051F020 MCU to replace PLC controller to reduce volume and cost. The MCU is connected with PC by RS485. Industry configuration software KINGVIEW6.51 is used as upper computer monitor software, and friendly monitor picture is developed realizing long-distance setting, monitoring and fault diagnosis.Finally, the optimal switch-on angle and switch-off angle is got in experiments and the feasibility of the control scheme is proved.