Summary of electric actuators, and smart actuators

Abstract: electric actuators, and smart actuators overview information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. 1. 1. Electric actuators electric actuators, and pneumatic actuators, is an important part of control system. It receives from the controller of 0 ~ 10 ma, or 4 ~ 20 ma dc current signal, and convert them to corresponding angular displacement or displacement of straight travel,. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a summary of electric actuators, and smart actuators article details. 1. 1. Electric actuators electric actuators, and pneumatic actuators, is an important part of control system. It receives from the controller of 0 ~ 10 ma, or 4 ~ 20 ma dc current signal, and converting it into the corresponding angular displacement or displacement of straight travel, go to the control valves, baffle control mechanism in order to realize automatic control, etc. Electric actuators have Angle of stroke, stroke and many rotary type, etc. Quarter-turn electric actuator driven by motor components, the input dc current signal can be converted into the corresponding angular displacement ( 0° ~ 90度; ) , the actuator is suitable for the manipulation of the rotary control valve butterfly valve, damper. Straight travel actuators receives input dc current signal, make the motor rotation, and then by the reducer reducer and converted into a linear displacement output, to manipulate single-seat, two-seater, tee, etc. Various kinds of control valve and other institutions of linear control. Many rotary actuators are mainly used for opening and closing turn type valve gate valve, globe valve, etc. Because of its electric power is larger, zui big dozens of kw, more commonly used for on-site operation and remote control. Several types of electric actuators are basic on the electrical principle is the same, only is not the same as the reducer. The following brief introduction of Angle of electric actuators. Electric actuators consists of two parts, the servo amplifier and actuators. Servo actuator and consists of two phase reducer and position transmitter. For electric actuator composition block diagram. Ii from the regulator as input signal of servo amplifier, it compared with position feedback signal If its two phase difference after amplification control servo motor are turning or reverse, then through reducer reducer after changing of the opening of the output shaft of the regulator or baffle angular displacement) 。 At the same time, the displacement and the output shaft of the position transmitter convert current signal, If the valve position indicator and feedback signal. When the If equals the Ii, two-phase motor stop running when the valve opening is stable with the controller output ( The actuator input) Ii is proportional to the signal. Output shaft Angle & theta; Ii type on the relationship with the input signal, the scale for the proportional coefficient. On the type, the Angle and the input signal is proportional to the output shaft, similar to electric actuators can be seen as proportion link. Electric actuators can be controlled by the electric control system of manipulator to realize automatic operation and manual operation of the switch to each other. When the operator of the switch to open concern to & other; Throughout the manual &; Position, by the positive and reverse action buttons control the power of the motor directly, in order to realize the actuator output shaft of forward and inversion, manual operation by remote control. In the face of electric actuator servo amplifier and actuators were introduced. 1. Servo amplifier, servo amplifier composed of front magnetic amplifier, trigger, the main loop of the thyristor, power components, etc. As shown in figure 4 - 5. It is the function of comprehensive input signal and feedback signal, and the result signal amplification, make it have enough power to control the servo motor rotation. According to the result of comprehensive after signal polarity, amplifier should be output corresponding to the polarity of the signal, to control the positive and inverse operation of the motor. To meet the requirements of complex control system, servo amplifier has three input signal channel and a position feedback channel - _ as a result, it can at the same time three input signal and a position feedback signal. Simple control system, the only one of the input channel and position feedback channels. Prestage magnetic amplifier is a high gain amplifier, input signal and the position feedback signals from the controller in the magnetic amplifier, when the two are not equal, the deviation signal amplifier amplification, according to the input signal and feedback after subtracting the deviation of the positive and negative polarity and amplifier in a and b have two type of the input voltage at two o 'clock, two transistor control trigger circuit of a work, a deadline, make the main circuit of thyristor conduction, the two-phase servo motor and rotation, turning on the power supply to drive the regulating mechanism of active control. Thyristor or get an electric shock switch in the circuit. Servo amplifier has two sets of switching circuit, the trigger with two sets of main loop, each individually accept positive deviation or negative deviation of the input signal, to control the servo motor forward or reverse.

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