29 Apr
2016
29 Apr
'16
1:10 p.m.
Paul Koning wrote:
Ok, I figured that much. The problem/question is why there
are no Amp ratings on anything? Assuming the DC equation:
Watts = Amps X Volts
I want a constant current supply that "pushes" 0.41 Amps.
A little more googling reveals that the above supply is
rated "1.67A output". This seems to support the W=AV
theory. So, do I want a PS labeled "15 watt 36vdc",
regardless of how many bulbs I want to drive? You say
"within limits". What specification do I look for to
understand the limits?
Thanks
On Apr 29,
2016, at 3:32 PM, Bill Sudbrink <wh.sudbrink at verizon.net>
wrote:
... The "bulbs" are labeled:
15F18120-45 15 watt 36vdc constant current
I'd like to put four in a fixture and I'm trying to
understand what kind of driver I need and how to wire
it. I was thinking of using a Mean Well LPF-60D-36
like this:
http://www.ebay.com/itm/Mean-Well-LPF-60D-36-AC-DC-POWER-SUPPLY-
Dimmable-LED
-DRIVER-36V-60W-CLASS2-
/161857068172?hash=item25af6edc8c:g:9hQAAOSwA4dWHVn5
and wiring the "bulbs" in parallel to it. But after
realizing that I'm not completely sure what a "constant
current" power supply does and doing a little "googling"
I don't know if that's the right approach.
A constant current supply is one that delivers a constant
current to a varying load (within limits) just as a constant
voltage supply delivers a constant voltage to a varying load.