Pneumatic actuator, electric actuator performance comparison

the performance of the pneumatic actuator and electric actuator is
in terms of technical performance, the advantages of pneumatic actuator mainly includes the following aspects:
( ） Load is big, can adapt to the application of high torque output.
( ） Quick, quick reaction.
( ） Work, good adaptability to the environment, especially in the inflammable, explosive, more dust, strong magnetic, bad work environment, such as radiation and vibration than hydraulic, electronics, electrical control is superior.
( ） Travel by blocked or pneumatic valve stem live when the motor is easily damaged.
and the advantage of electric actuators include:
( ） It has compact structure, small volume. Compared with pneumatic actuator, electric actuator structure is relatively simple, a basic electronic systems including actuator, three-position DPDT switch, fuse and some wires, easy to assemble.
( ） Electric actuator drive source is flexible, can be sent to meet this need, car power and pneumatic actuators need air and compressed drive.
( ） Electric actuator is no danger of 'gas', high reliability, and the air compressibility makes the stability of the pneumatic actuator is a bit poor.
( ） Don't need to all kinds of pneumatic pipeline installation and maintenance.
( ） Can not power that maintain a load, and pneumatic actuator requires constant pressure supply.
( ） Because do not need extra pressure device, electric actuator is more quiet. Usually, if pneumatic actuators in the case of large load, to retrofit silencer.
( ） In pneumatic device usually need to convert electrical signals into the gas signal, and then converted into electrical signal, transmission speed is slow, not used for complex circuit components series too.
( ） Electric actuator to control the accuracy is better.
in fact, the pneumatic system and electric system are not mutually exclusive. Pneumatic actuators can achieve rapid simple linear circular movement, simple structure, convenient maintenance, at the same time can be used in all kinds of bad working environment, such as explosion-proof requirements, dust, or humidity conditions. But rapidly increase in the force and under the condition of accurate positioning, with servo motor electric drive has the advantage. For accurate, synchronous operation, regulation and the adjustable positioning programming applications, electric drive is the best choice, with closed loop servo positioning controller or stepper motor of electric drive system can supplement the deficiency of pneumatic system. Of various modern control system more and more complex, more and more sophisticated, not some kind of drive control technology can meet the needs of system control functions. Electric actuators are mainly used for need precise control applications, flexible request in the automation equipment, the same equipment are required to meet the need of machining of different sizes, needs to have a multipoint positioning control actuators, and to the operation of the actuator for precise control or synchronous tracking speed and torque, the use of traditional pneumatic control could not be achieved, and electric actuators can very easily achieve such control. Thus the pneumatic actuator is suitable for simple motion control, and electric actuators are used in precision motion control occasions.