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OfflineBuster_Brown
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Re: 36vdc Filter fan unit a/c power supply Help needed [Re: ThUmB pRiNt]
    #26139539 - 08/17/19 06:30 AM (4 years, 5 months ago)

I dunno, might be simpler to bypass the spaghetti-junction and just wire the two 6amp fans directly to a DC supply. (*puts wise man back into the shoe box in the closet)


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OfflineBuster_Brown
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Re: 36vdc Filter fan unit a/c power supply Help needed [Re: Buster_Brown]
    #26139553 - 08/17/19 06:49 AM (4 years, 5 months ago)

Label states 4.2 amps max at 36 volts DC but the fans are labeled "6A" each, so possibly they are 12 volt/6 amp x 2 = 144 watts at 12 volts DC


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OfflineBuster_Brown
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Re: 36vdc Filter fan unit a/c power supply Help needed [Re: ThUmB pRiNt]
    #26139585 - 08/17/19 07:27 AM (4 years, 5 months ago)

OK. Black is neutral in Chinese wiring (as designated by the minus sign next to "Power source") Red is labeled +(positive) and these two go to what looks like a transformer.

With the idea that the spaghetti junction could be by-passed, we could disconnect the wires leading from the transformer look-alike then hook up the wires that lead to it to 110v AC and test the exit terminals from it with a volt meter (just like you said except the black is neutral)


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InvisibleThUmB pRiNt
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Re: 36vdc Filter fan unit a/c power supply Help needed [Re: Buster_Brown]
    #26139591 - 08/17/19 07:34 AM (4 years, 5 months ago)

Ya I know nothing to do with this I literally was just taking a shot in the dark but obviously I missed.

So glad I have you and the rest of the fam here.

So I’ve been looking up power sources, and this is what I got so far...



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InvisibleThUmB pRiNt
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Re: 36vdc Filter fan unit a/c power supply Help needed [Re: ThUmB pRiNt]
    #26139592 - 08/17/19 07:35 AM (4 years, 5 months ago)

Which do you think is best?


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OfflineBuster_Brown
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Re: 36vdc Filter fan unit a/c power supply Help needed [Re: ThUmB pRiNt]
    #26139594 - 08/17/19 07:39 AM (4 years, 5 months ago)

Follow my last post before buying anything.


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InvisibleThUmB pRiNt
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Re: 36vdc Filter fan unit a/c power supply Help needed [Re: Buster_Brown]
    #26139598 - 08/17/19 07:43 AM (4 years, 5 months ago)

I know I caught that post, but my question remains the same?

Or should I do this test with the meter first?


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OfflineBuster_Brown
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Re: 36vdc Filter fan unit a/c power supply Help needed [Re: ThUmB pRiNt]
    #26139611 - 08/17/19 07:55 AM (4 years, 5 months ago)

If we can get Wise Man to agree that Black is neutral in Chinese wiring then you could possibly omit the optional power supply.

All I know about voltmeters is that you check from the higher settings to the lower because if you're getting 36 volts and the meter is on the 12 volt scale it can damage the meter but they're as low as $7 at Amazon.


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InvisibleThUmB pRiNt
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Re: 36vdc Filter fan unit a/c power supply Help needed [Re: Buster_Brown]
    #26139634 - 08/17/19 08:17 AM (4 years, 5 months ago)

Thanks again Brother


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OfflineKwyjibo
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Re: 36vdc Filter fan unit a/c power supply Help needed [Re: ThUmB pRiNt]
    #26140631 - 08/17/19 09:40 PM (4 years, 5 months ago)

Quote:

Buster_Brown said:

With the idea that the spaghetti junction could be by-passed, we could disconnect the wires leading from the transformer look-alike then hook up the wires that lead to it to 110v AC and test the exit terminals from it with a volt meter (just like you said except the black is neutral)



Do not connect any part of it to AC. That's not a transformer, it's an inductor and along with the capacitor next to it is a filter as koraks stated. If you just start randomly hooking up AC to things without knowing what you're doing....

Quote:

ThUmB pRiNt said:
Ya I know nothing to do with this I literally was just taking a shot in the dark but obviously I missed.

So glad I have you and the rest of the fam here.

So I’ve been looking up power sources, and this is what I got so far...




The one on the bottom of this picture should be fine, it's better to have a little headroom rather than run a smaller one at it's limits.


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Invisiblekoraks
Registered: 06/02/03
Posts: 26,670
Re: 36vdc Filter fan unit a/c power supply Help needed [Re: Buster_Brown]
    #26140831 - 08/18/19 02:17 AM (4 years, 5 months ago)

Quote:

Buster_Brown said:
With the idea that the spaghetti junction could be by-passed, we could disconnect the wires leading from the transformer look-alike then hook up the wires that lead to it to 110v AC and test the exit terminals from it with a volt meter (just like you said except the black is neutral)



NO! Refer to my previous post and to what @Kwyjibo says above. Nothing in those photos seems to be designed to be hooked up to any kind of AC power source.

If your consider hooking the fans up to a power source directly, first determine:
* The voltage the fans are supposed to run on
* Their maximum current draw
* Which leads serve which purpose; keep in mind that these fans are connected with a 6-prong connector to their control/power supply board so you'll have to figure out which is which.
Checking these things will require further dismantling the unit to gain access to a (hopefully present) specification sticker on the fans.

Quote:

Buster_Brown said:
Label states 4.2 amps max at 36 volts DC but the fans are labeled "6A" each, so possibly they are 12 volt/6 amp x 2 = 144 watts at 12 volts DC



Given the fact that both motors are labeled as fused with a 5A fuse, they are certainly not designed to draw 6A. So we'll still have to guess how the fans themselves are powered exactly. See above.

All considered, given OP's knowledge of electronics and the power levels involved, I would strongly suggest running this unit as it is intended to: i.e. on 36V while keeping all the control logic that is currently present in place. Keep in mind that it includes several fuses that provide some protection against fuckups. You don't want to bypass these if you don't know *exactly* what you're doing, and this is evidently not the case.


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Invisiblekoraks
Registered: 06/02/03
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Re: 36vdc Filter fan unit a/c power supply Help needed [Re: ThUmB pRiNt]
    #26140836 - 08/18/19 02:20 AM (4 years, 5 months ago)

Quote:

ThUmB pRiNt said:
Ya I know nothing to do with this I literally was just taking a shot in the dark but obviously I missed.

So glad I have you and the rest of the fam here.

So I’ve been looking up power sources, and this is what I got so far...





ONLY the LETOUR 9.7A and ALCOVE 10A units from that selection should be considered. NONE of the other provides any safety margin and will only barely provide the necessary power, resulting in overheating and likely premature failure. Please refer to my first post in this thread.

Please take the time to carefully read and digest the things I have been saying, as I'm now getting to the point of repeating myself.


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InvisibleThUmB pRiNt
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Re: 36vdc Filter fan unit a/c power supply Help needed [Re: koraks]
    #26142322 - 08/19/19 02:54 AM (4 years, 5 months ago)

Ohh wow I had post this late night and I had not noticed but I put some pictures doubles and I left some other pictures out completely.

I reviewed it all and re posted all the pics.

Thank you so for your help, I have read everything you all have told me and I will be rereading it.

I want to be sure to use the best match and you guys said it’s better to get something that is rated for much higher that what the device is going to pull for safety reasons, so does that mean I have to look for one with a high amperage rating only or should I also look form something with a different feature in specific?

So far from what I understood these are the ones I found...

What do you guys think?

                                             


Edited by ThUmB pRiNt (08/19/19 10:37 AM)


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Invisiblekoraks
Registered: 06/02/03
Posts: 26,670
Re: 36vdc Filter fan unit a/c power supply Help needed [Re: ThUmB pRiNt]
    #26142402 - 08/19/19 06:02 AM (4 years, 5 months ago)

The LETOUR unit still looks like the best deal for your purpose


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InvisibleThUmB pRiNt
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Registered: 04/23/10
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Re: 36vdc Filter fan unit a/c power supply Help needed [Re: koraks]
    #26142668 - 08/19/19 10:38 AM (4 years, 5 months ago)

Quote:

koraks said:
The LETOUR unit still looks like the best deal for your purpose




Would you take a gander one more time please?

Last night I posted that but I was so sleepy I posted the wrong pictures and I left some out

I just edited the post before this and it’s pics


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Invisiblekoraks
Registered: 06/02/03
Posts: 26,670
Re: 36vdc Filter fan unit a/c power supply Help needed [Re: ThUmB pRiNt]
    #26142690 - 08/19/19 10:56 AM (4 years, 5 months ago)

Look, any unit supplying 36V and at least something like 7A will do the job. Choose any one that suits your budget and other requirements.


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InvisibleThUmB pRiNt
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Re: 36vdc Filter fan unit a/c power supply Help needed [Re: koraks]
    #26142721 - 08/19/19 11:19 AM (4 years, 5 months ago)

Thanks, you say just get the requirements I want but Im not even sure about what requirements I even need want or can have.

That’s why I was asking, hoping someone here actually understood what they were looking at so they can tell me what would be the best one with the best features and why so that I could understand.

All of these are at a price range I am willing to pay and if you or anyone else knows of a better or the perfect power source for this application I might even be willing to pay more if it will be at least better.


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InvisibleThUmB pRiNt
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Registered: 04/23/10
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Re: 36vdc Filter fan unit a/c power supply Help needed [Re: ThUmB pRiNt]
    #26142722 - 08/19/19 11:21 AM (4 years, 5 months ago)

Also any of you interested in any Hepas?

I have 9 Hepa filters of different sizes if any of you are interested

Pm me


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OfflineBuster_Brown
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Re: 36vdc Filter fan unit a/c power supply Help needed [Re: ThUmB pRiNt]
    #26142771 - 08/19/19 11:54 AM (4 years, 5 months ago)

You might rig up a raffle for the Hepa's in the Marketplace


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Invisiblekoraks
Registered: 06/02/03
Posts: 26,670
Re: 36vdc Filter fan unit a/c power supply Help needed [Re: ThUmB pRiNt]
    #26142826 - 08/19/19 12:39 PM (4 years, 5 months ago)

Quote:

ThUmB pRiNt said:
Thanks, you say just get the requirements I want but Im not even sure about what requirements I even need want or can have.




You need:
  • 36V
  • Enough current capability with some headroom as a safety margin; let's say anything beyond 6 or 7A.

Those are the requirements. Now pick a unit. I'd go for one that's reasonably cheap and won't take ages to arrive.


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