Choosing an AC or DC solenoid valve coil | Selection guide | Tameson
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- Опубліковано 27 тра 2024
- In this video, Max explains how to select the right coil for your solenoid valve. View our coil range here ► tameson.com/valves/solenoid-v...
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Timecodes:
00:00 - Intro
00:28 - How solenoid valves work?
01:00 - DC coil working principle
01:16 - AC coil working principle
01:47 - The difference between AC and DC
02:45 - Outro
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A solenoid valve works using the following principle. When current flows through the coil, it generates a magnetic field which attracts the armature towards the center of the coil. Since the armature is drawn towards the center regardless of the polarity of the current, an opposing force is needed to return the armature into the starting position when there is no electricity. This is achieved by using a spring. In order to actually use the valve, the magnetic force generated by the coil must be larger than the spring force.
For a DC coil - the coil is energized allowing the magnetic force generated by the coil to overcome the spring force and thus the valve open, When it is de-energized, the spring force closes the valve.
With AC coils this is a bit more complicated. AC switches polarity , therefore twice per period the current in the coil is zero and thus the magnetic force is zero. This is a problem because the spring force is constantly pulling the armature down. This results in a vibration of the armature, which produces a humming sound and can cause stress the components. To fix this, a copper ring is installed around the armature. This ring stores some of the magnetic energy such that the armature will not vibrate.
When a solenoid valve goes from the OFF to the ON state, the coil should initially generate more force in order to overcome spring tension combined with the pressure of the fluid and the friction of the armature. Once the armature is lifted the coil can decrease the generated force in order to reduce power consumption and heating.
DC coils have a slower response time compared to AC coils due to the resistivity. As a result, DC coils will waste a considerable amount of power in the open state because more electricity is needed at higher resistivity. In other words, AC solenoid valves are more energy efficient compared to DC valves. But, as explained, AC valves do come with other drawbacks, such a possible vibrations.
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#tameson #solenoidvalvecoil
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the best explanation of the principles; suggest to improve the video by showing a dc and ac coil pictures for each one
Thanks for your comment! We made better visuals in our new video: ua-cam.com/video/MHmBrTw7J_o/v-deo.html
Hello Max, I appreciated your guide on the video. I am a mechanical designer who works for automatic bio system. I am making a centrifuge that has a cooling system. But I haven't really had the experience I made a kind of cooling system. So, I took a look at a centrifuge to get the knowledge. They used AC solenoid valve which is PVE-191. They used 2 EA. I guessed that one was for cooling and the other one was for hot. Now my question is that.. Is it possible that a AC solenoid valve use for hot system?
Hello, yes it could be used. You need to check all requirements that you need and select the valve based on the conditions you have in the system. You can find out more on solenoid valves at: shop.tameson.com/pages/solenoid-valve-types
Is that selection of AC/DC solenoid valves based on supply of power suppy capable? Any concern about cost or stablization?
Dear HieuCN, thank you for your question. It is not really clear what your question is regarding. Please get in contact with our customer support so we can provide you with an answer, thank you! tameson.com/about-us.html
I have a dual port solenoid valve (24VDC, 80 MOPD, 6 watt & 5/64 orifice) but no info on polarity or amperage requirement. Can I use a generic 24VDC power adapter for this application? If not, how can I determine what 24VDC power adapter will work on this valve?
Dear Sword Fish, Thank you for your question. If the power is 6 watt, the min. required amperage will be 6(W))/24(V) = 0.25 (A). If you'll use a generic 24VDC power supply with a >0.5A current (2x safety factor) that should work just fine. Good luck with your application
@@Tameson Thank you for the info. 👍🏼
Thank you
You're welcome
is dc a bit safer than ac around water and is there any difference between 9v, 12v and 24v dc?
DC voltage is typically safer than AC if around water.
How does an AC solenoid work? The force applied to the core will oscillate at the same frequency as the current, how does it move in one direction?
Hi Jacopo, you can find more information in our article: tameson.com/pages/choosing-an-ac-or-dc-coil-for-a-solenoid-valve
can i use 220v ac solenoid instead of 12v dc for washing machine
Hello Rakesh. Generally you could, but it depends which voltage is available to you to power the solenoid valve.
Do DC generate more heat due to resistance?
Yes, typically, DC coils do generate more heat due to resistance than AC coils. However, it's important to note that the level of heat generated can often depend on the specifics of your application and usage conditions.
We have a wide range of solenoid valves that may be suitable for your needs. You can browse our range at our website: www.tameson.com
@@Tameson Thank you
Please someone answer me can i use my ac coil with batteries if yes witch batteries
Joker - your batteries are supplying DC current. Sounds like you need a DC coil.
It sounds like you need an electrical theory class on the difference between AC and DC. AC is ALTERNATING and DC is not. Gross conceptual error. Does not compute. Watch a bunch of videos on the difference between AC and DC signals and educate yourself on electron flow.
Can i give 220 volt dc power to 220 volt ac solenoid coil .is it safe for coil?
Please reply. Sir
No this is not safe for the coil, as the impedance for 220V DC will be lower (compared to 220VAC), this will result in a too high current for the coil.
You could try it once for a few seconds until is sends out the magic smoke and you can then understand by losing money and downtime.
@@Tameson Wrong, the impedance of the DC coil is greater than the AC coil. If you power a AC coil with DC supply it will heat up and burn out.
you are speak very hurt please slow down son what and my tuition en General when used A.C. coil and when used DC coil
Hi Abbas, Could you try to rephrase your question?