It would help if you can tell us what type of valve it is and how it is controlled. ie. a cartriage valve with a coil you want to modulate or a "smart" valve with built in controller that needs a 0-10V position siginal
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Re: Schematic for Proportional Control of Hydraulic Valve?
It would help if you can tell us what type of valve it is and how it is controlled. ie. a cartriage valve with a coil you want to modulate or a "smart" valve with built in controller that needs a 0-10V position siginal
-Bert
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Re: Schematic for Proportional Control of Hydraulic Valve?
Here's the data sheet for the hydraulic valve (or very close to it, the actual valve has 2 coils for 3 way, center off, operation). http://www.sterling-hydraulics.com/f...df/JP04C31.pdf
The voltage for each coil is 24 VDC at 14W-18W so I've been trying to make a 1A chip, IRL530 work to provide proportional control.
It doesn't come with electronics, just the coils. My understanding is it operates A0-24V B0-24V where the coil energized affects direction and voltage affects rate of flow.
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Re: Schematic for Proportional Control of Hydraulic Valve?
From the diagram it seems the valve will produce a linear flow function from 20% to 60% of the rated current. You can use a PWM to obtain the desired flow control.
The attached schematic has been designed to control the speed of a motor but it will be OK also for this proportional flow valve.
Cheers
Al.
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