After receiving a control signal, the electric actuator's motor rotates. A reduction mechanism converts the rotational motion into linear or angular displacement, actuating valves and other movements. A position sensor generates feedback signals to form a closed-loop control system, ensuring accurate positioning.
The operating principle of an electric actuator is a precision mechanical transmission process based on electric drive and closed-loop control. When the controller issues a command, the internal motor (DC or AC) reduces the speed and amplifies the torque via a worm gear or gear train, driving the output shaft through 0°-90° angular displacement or linear motion, thus opening and closing the valve. Key steps include:
① A displacement sensor monitors the valve position in real time (with an accuracy of ±0.5°);
② An electronic overload protection module automatically shuts off the power when the torque exceeds the limit;
③ A mechanical limiter prevents mechanical jamming. For example, our intelligent modulating actuator (torque 300 Nm) features an output speed of 18 rpm and, with an IP65 protection rating, ensures reliable operation in applications such as the chemical and power industries.
