CXA3590 Build Plan

Doer

Doer

Well-Known Member
The Air Suction Fan fits on 4" PVC threaded. So, I cut a wood block the exact size of the sink and shroud cross section.. I take a 4" PVC Connector, thread on one side, slip on the other.

I heat the slip side and force the soft plastic around the woodblock. Now have my adapter from the heat sink to the exhaust fan

I make 2 of those, and on the intake side I use the threaded 4" side to screw on a filter.
 
Doer

Doer

Well-Known Member
Ah Ha. Sometimes it is just the matter of what is the search term. Another contribution from the RV market.

A Sail Switch

The sail switch is an on/off device. (normally in the off position) It gets it's name from the "sail" or paddle that is attached to the switch mechanism. As the blower comes up to speed, it blows air onto the sail with enough force to push the switch closed, thus allowing electrical current to flow to the next component in line.
It's job is to determine if there is adequate air flow for proper combustion to take place. If the battery voltage is low or the fan does not come up to 75 per cent of it's design speed, the sail switch will not close.
 
Doer

Doer

Well-Known Member
Parts List
Extruded Aluminum HeatsinkAlloy: 6063-T5 Width: 3.500" Fin Height: .75"Base: .300" C/W/3": approximately 2.50 Weight per Inch: .15 - 72"

$113.40 delivered


CREE CXA3590, Original CREE CXA 3590 COB leds
FOB Price: US $40 - 50 / Piece Get Latest Price
Min.Order Quantity: 10 Piece/Pieces Samples available
http://www.alibaba.com/product-detail/CREE-CXA3590-Original-CREE-CXA-3590_60037039008.html

$550 delivered (for 10)

Aluminum Sheet
$20 local

4" DC blower
$38 delivered

Sail switch
$15 delivered

PVC parts
$15 local

Drivers
https://www.trcelectronics.com/View/Mean-Well/HLG-185H-C1400A.shtml
Mean Well HLG-185H-C1400(A) x 5
$350 delivered

===============
$1101.4 delivered for 1000w
or
400 PAR watts
or
$2.75 a PAR watt for the kit at the house, ready to go

 
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Doer

Doer

Well-Known Member
What is a good driver for three of these @77vF and 100w each.

I thought I had notes on one that was mentioned in another thread, It was an HLG that had 378v or something.
 
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C

churchhaze

Well-Known Member
cxb3590 3000k 80cri cb bin is 11,000lm at 85C

this is with a test current of 1200mA. and a Vf of 71.5V, so power is ~85.8W dissipated.

that's ~128lm/W at 1200mA. With an Cree's official stated LER rating of 325lm/W for the 80cri 3000k, that would make operating at under those conditions 39.4% efficient.

Of course I don't think many DIY enthusiasts actually run them at 1200mA, nor do they run the case temperature at 85C. You see huge gains in efficiency when driving at lower currents and temperatures.
 
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Doer

Doer

Well-Known Member
I see, I am thinking about running at 100w input. I wonder if the Bs are less available more expensive?

IAC, I might need to run 2 COBs on one Mean Well HLG-185H-C1400(A)
That is 100.8w each.

I'm still looking something in the 300w range, to run 3 COBs.
 
Greengenes707

Greengenes707

Well-Known Member
Doer said:
It doesn't have the lumens. It is more efficient.

I looked at it. Please tell me why you prefer it. I am missing something.
Click to expand...
Doer said:
With less max light output.
Click to expand...
When looking at the same thing as you are here(cxb is literally just a new and improved cxa)...more efficient is more lumens/w..and more importantly photons/w. And the CXB has it all.

CXA 3590 CB
Driven at 1.2a will pull ~92.4w and be 38.3% efficient...producing 35.39 PARwatts of light

CXB 3590 CB
Driven at 1.2a will pull ~86.4w and be 41%efficient...producing 35.4 PARwatts of light

So for 6 less watts...the CXB produces the same amount of light...no matter what those human lumens say.
 
Doer

Doer

Well-Known Member
Greengenes707 said:
When looking at the same thing as you are here(cxb is literally just a new and improved cxa)...more efficient is more lumens/w..and more importantly photons/w. And the CXB has it all.

CXA 3590 CB
Driven at 1.2a will pull ~92.4w and be 38.3% efficient...producing 35.39 PARwatts of light

CXB 3590 CB
Driven at 1.2a will pull ~86.4w and be 41%efficient...producing 35.4 PARwatts of light

So for 6 less watts...the CXB produces the same amount of light...no matter what those human lumens say.
Click to expand...
Where can you get them?
 
bicit

bicit

Well-Known Member
Have you considered the Vero 29? It may be a better fit at the powerlevels you're working with. They have a better thermal package than the CXA/CXB series. The new higher efficiency models will be hitting digikey this month as well.
 
Doer

Doer

Well-Known Member
Wow. When I got the first pass at the cost, it came to $2.75 a PAR watt. That's pretty good, right? See the parts list a few posts back.
 
Doer

Doer

Well-Known Member
bicit said:
Have you considered the Vero 29? It may be a better fit at the powerlevels you're working with. They have a better thermal package than the CXA/CXB series. The new higher efficiency models will be hitting digikey this month as well.
Click to expand...
OK, let's look that that.

I like the solder less connector right off. I like the silkscreen indicators and marks on the COB.
Radial die config, sounds right. Killer current curve.


Vero29currentCurve.JPG
http://www.bridgelux.com/wp-content/uploads/2014/02/DS33 Bridgelux-Vero 29 LED-Array-Data-Sheet 2014.02.03.pdf
 
Doer

Doer

Well-Known Member
So, I suppose it is this one?

BXRC-30E10K0-xx, 3000K 80CRI, 2100ma @36v

or
BXRC-30E10K0-L-03 at digikey for $28.71 Gotta love that price.

Need to run at 2.8 amps for 100w @36v.

I am getting a bit lost, but isn't the higher forward volts of 77v easier on the house circuits? It takes less amps? I am always at, amp lack, with my projects.
 
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