For driving a valve based on the datasheet we should limit the max current that flow into the solenoid. If we have an AC valve we should take the inrush current at the start-up into account and apparently for the dc valves we don’t have the inrush current however the DC coil have a higher wattage rating when it’s cold. So again we need more current in the start-up. Having high and low voltage on the solenoid cause the damage and it might burn the valve. If we want to limit the current by inserting a series resistor we should have a high wattage resistor (i.e. having max 2.4 amp for 24vdc we should have 10 ohm resistor – 57W!). How about H-bridges ?
I wonder to know what the best practice for driving a valve (Ac or dc) is. I would be appreciate if you give me some references or book to read.
Thanks
P.S:
for this type of valve (Standard 12vdc), Coil resistance is 3 ohm and max current is 2.6 so we should reduce the amount of current somehow.
Best Answer
The RZMO-AES is a proportional valve, with an integrated digital control interface (there are several options).
You don't drive a coil directly, you provide 24V power to the valve and then talk to it on a digital interface. You don't need to concern yourself at all with how the coil is driven, that's an internal implementation detail.