SHARE
MORE DETAIL
Electropneumatic proportional valve is referred to as proportional valve, ordinary pneumatic valve can control the fixed value of equipment through pre-adjusted liquid flow pressure and flow. The feedback is reached by continuous changing speed of slow, fast and slow, or by simulating a good control curve with a certain precision to realize the force control. The ordinary pneumatic valve is controlled by pneumatic system of electropneumatic proportional valve.
Control valve consists of two main assemblies: valve body assembly and actuator assembly (or actuator system), which are divided into four series: single-seat series control valve, double-seat series control valve, sleeve cylinder series control valve and self-operated series control valve. Variations of four types of valves can lead to many different applicable configurations, each with its own specific applications, features, advantages and disadvantages. While some control valves are used in a wider range of applications than others, control valves are not suitable for all applications to work together to create the best solution for enhanced performance and reduced cost.
The electropneumatic valve is a pneumatic component that drives the valve core by an electromagnetic coil, while the control valve is a component that generates electromagnetic force through electromagnetic induction. The greater the current of the control valve, the greater the thrust, so will different energization currents for the common solenoid valve coils make the original on-off valve become a proportional valve?
This problem is obviously negative. Generally speaking, the internal processing of ordinary solenoid valves cannot achieve the processing accuracy of proportional valves. In addition, its internal structure does not consider too many parameters such as pneumatic pressure balance. Therefore, when the electromagnetic force is not large, the valve core cannot be stabilized in the transition position, and the electromagnetic switch valve cannot represent the proportional performance. Or the proportional performance of the solenoid switch valve is very inconspicuous. Therefore, the design and manufacturing process of proportional valves must be very different from those of on-off valves, requiring more investment in research and development.
Another question: For the same proportional valve, can the drive current of the solenoid coil be directly powered by the DC model without using the proportional amplifier? This method is possible in principle. The variable resistance signal can be used for coil control. However, it will waste a lot of energy, and at the same time, it will be accompanied by a lot of heat, and there will be no flutter and current when the valve core moves. Due to the feedback effect, the performance of the valve cannot be optimized.
In addition to the internal current feedback of the amplifier, the high-frequency dither signal is also an important function. The high-frequency flutter signal can keep the proportional spool vibrating at all times, so that it can overcome the influence of static friction and try to eliminate the influence of hysteresis on its performance.
A proportional amplifier is an electronic device used to provide a specific performance current to a proportional electromagnet, and to perform open-loop or closed-loop regulation of an electropneumatic proportional valve or electropneumatic proportional control system. So, what performance does the so-called specific performance current refer to?
To sum up, using a proportional amplifier can achieve the following functions: control the amount of current applied to the coil by the valve, set the minimum and maximum input signal of the proportional valve, set the minimum and maximum output current, and also set the ramp-up and ramp-down time, and finally set The frequency of the dither signal is obtained through the built-in current negative feedback function.
For further information about electropneumatic valve, please visit:
https://www.genndih.com/proportional-pressure-regulator.htm
Control valve consists of two main assemblies: valve body assembly and actuator assembly (or actuator system), which are divided into four series: single-seat series control valve, double-seat series control valve, sleeve cylinder series control valve and self-operated series control valve. Variations of four types of valves can lead to many different applicable configurations, each with its own specific applications, features, advantages and disadvantages. While some control valves are used in a wider range of applications than others, control valves are not suitable for all applications to work together to create the best solution for enhanced performance and reduced cost.
The electropneumatic valve is a pneumatic component that drives the valve core by an electromagnetic coil, while the control valve is a component that generates electromagnetic force through electromagnetic induction. The greater the current of the control valve, the greater the thrust, so will different energization currents for the common solenoid valve coils make the original on-off valve become a proportional valve?
This problem is obviously negative. Generally speaking, the internal processing of ordinary solenoid valves cannot achieve the processing accuracy of proportional valves. In addition, its internal structure does not consider too many parameters such as pneumatic pressure balance. Therefore, when the electromagnetic force is not large, the valve core cannot be stabilized in the transition position, and the electromagnetic switch valve cannot represent the proportional performance. Or the proportional performance of the solenoid switch valve is very inconspicuous. Therefore, the design and manufacturing process of proportional valves must be very different from those of on-off valves, requiring more investment in research and development.
Another question: For the same proportional valve, can the drive current of the solenoid coil be directly powered by the DC model without using the proportional amplifier? This method is possible in principle. The variable resistance signal can be used for coil control. However, it will waste a lot of energy, and at the same time, it will be accompanied by a lot of heat, and there will be no flutter and current when the valve core moves. Due to the feedback effect, the performance of the valve cannot be optimized.
In addition to the internal current feedback of the amplifier, the high-frequency dither signal is also an important function. The high-frequency flutter signal can keep the proportional spool vibrating at all times, so that it can overcome the influence of static friction and try to eliminate the influence of hysteresis on its performance.
A proportional amplifier is an electronic device used to provide a specific performance current to a proportional electromagnet, and to perform open-loop or closed-loop regulation of an electropneumatic proportional valve or electropneumatic proportional control system. So, what performance does the so-called specific performance current refer to?
To sum up, using a proportional amplifier can achieve the following functions: control the amount of current applied to the coil by the valve, set the minimum and maximum input signal of the proportional valve, set the minimum and maximum output current, and also set the ramp-up and ramp-down time, and finally set The frequency of the dither signal is obtained through the built-in current negative feedback function.
For further information about electropneumatic valve, please visit:
https://www.genndih.com/proportional-pressure-regulator.htm