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Part-Turn Electric Actuator Organization
- Oct 09, 2017 -

Electric actuators, like pneumatic actuators, are an important part of the control system. Part-Turn Electric Actuator It receives a 4 to 20mA or 0mA DC current signal from the controller and converts it into a corresponding angular displacement or straight stroke displacement to operate the control mechanism such as valves and baffles for automatic control.

Electric actuators have straight travel, Part-Turn Electric Actuator angular travel and multi-turn type. The rotary actuators convert the input DC current signal into a corresponding angular displacement (0 ° to 90 °) using a motor as a power element. This actuator is suitable for operating a rotary control valve such as a butterfly valve or a baffle. Straight trip actuator to receive the input DC current signal after the motor rotation, and then decelerated by the reducer and converted to a linear displacement output, Part-Turn Electric Actuator to manipulate single-seat, two-seat, three links and other control valves and other linear control mechanism. Multi-turn electric actuator is mainly used to open and close the gate valve, globe valve and other multi-turn valve, because of its motor power is relatively large, the largest dozens of kilowatts, generally used for local control and remote control. These three types of actuators are two-phase AC motor-powered position servo, the three electrical principle is exactly the same, but the reducer is not the same.

The electric actuator is mainly composed of the servo amplifier and the actuator, the middle can be connected to the operator, the servo amplifier receives the control signal from the controller, compares it with the feedback signal of the output of the electric actuator, Part-Turn Electric Actuator if there is deviation, the difference After power amplification, drive two-phase servo motor rotation. And then deceleration by the reducer, driving the output shaft to change the corner. If the difference is positive, then the servo motor is running, the output shaft angle increases; if the difference is negative, the servo motor reversal, the output shaft angle decreases. When the difference is zero, the servo amplifier outputs the contact signal to stop the motor, Part-Turn Electric Actuator and the output shaft is stabilized at the corner position corresponding to the input signal. This positional feedback structure allows a good linear relationship between the input current and the output displacement.

Electric actuator can not only cooperate with the controller to achieve automatic control, but also through the operator to achieve automatic control of the control system and manual control of the mutual switch. When the switch of the operator is placed in the manual operation position, Part-Turn Electric Actuator the power supply of the motor is directly controlled by the positive and negative operation buttons to realize the forward or reverse rotation of the output shaft of the actuator, and the remote operation is carried out manually.