Principle of Multi-Turn Electric Actuator

The multi-turn Electric Actuator drives the screw or rotary mechanism through an electric motor, combining a reduction device and a closed-loop control system to convert electrical energy into multi-turn rotary motion, achieving precise control of the valve. ‌‌
I. Core Principles
1. Power Conversion and Transmission
① The motor (single-phase/three-phase) serves as the power source, which converts the high-speed, low-torque output into low-speed, high-torque output via a gear reducer, driving the screw or rotating mechanism.
② The rotary motion of the screw drives the piston or transmission components, converting it into multi-turn rotational movement (typically over 360°), suitable for valves that require multiple rotations to open or close (such as globe valves, gate valves, etc.).
2. Closed-loop control and feedback regulation
① Built-in position sensors (such as encoders and limit switches) monitor the actual position of the Actuator in real time and compare it with the set value.
② The motor operating state is adjusted through the controller to achieve precise positioning and dynamic regulation, with errors typically within ±1°.