What are the difference between on off electric actuator and modulating electric actuator?

On/off Electric actuators are used to control a device by opening or closing a specific valve to either a full open or full close position, while modulating electric actuators are used to control a device by varying the amount of flow or pressure in small increments.

On/off electric actuators are cheaper and simpler to maintain, while modulating electric actuators are more expensive but offer more precise control. On/off Electric actuator is a device used to control a valve, damper, or other device by converting an electrical signal into mechanical action. The motor is usually an AC induction motor and the gear train is usually a worm gear. The position sensor usually consists of a potentiometer, a limit switch, or a Hall effect device. The actuator is typically controlled by a PLC or computer. The actuator can be used to open or close a valve, open or close a damper, or perform other functions.

Modulating electric actuators are used to precisely control the motion of the actuator in order to achieve the desired motion profile. These actuators are often used to control the operation of valves, dampers, and other components in HVAC systems, as well as in many industrial processes.

Modulating electric actuators are more precise than on off electric actuators, as they feature a closed-loop feedback system that allows them to maintain the desired motion profile. This feedback system is typically comprised of a control system and a feedback sensor, which can be either a potentiometer or an encoder. The control system uses the feedback from the sensor to adjust the actuator’s motor speed or position in order to maintain the desired motion profile. Additionally, most modulating electric actuators feature adjustable speed and/or position limits, enabling them to be easily tailored to a specific application.