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› Power Supply for a Schulze 330
06-06-2004 01:31 PM  13 years agoPost 1
snsn

rrApprentice

NJ

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Does anyone know where to get a power supply for a Schulze 330?

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06-06-2004 02:02 PM  13 years agoPost 2
z11355

rrMaster

New England

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I dont remember the URLs off the top of my head
but in previous times this question has been
asked, quite a number of online sources have
been documented. (ie. do a search)

Depends on how much current you need too.

If you're trying to do high cell count e-flight, then
a computer power supply won't be enough.

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06-06-2004 03:04 PM  13 years agoPost 3
snsn

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NJ

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I'll be looking to charge a 4S3P Li-Poly.

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06-06-2004 03:34 PM  13 years agoPost 4
Bushy

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Tucson, AZ

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Buy a supply according to what the charger is rated for, not what battery you are charging. Add 20% to the supply current rating so it isn't run at max rating.

Modefo has a good deal on a supply that will work just fine.

Re: Re Topic: FS Hacker B50 15L / Heli 48-3P REDUCED

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06-06-2004 07:48 PM  13 years agoPost 5
DOKEY

rrProfessor

Northamptonshire UK

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40 AMPS continous

http://www.flightpower.co.uk

Dont know if they are available closer to your home though ?

Ryan.

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06-07-2004 02:50 PM  13 years agoPost 6
snsn

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NJ

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Amperage - How much is needed?

When your buying a Power Source for the Schulze 330, and you want to charge a Li-Poly TP- 4S3P -6000 - How much amperage is needed in the power source.
I've seen them from 7 amp up to 45 amps, priced accordingly?

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06-07-2004 06:04 PM  13 years agoPost 7
steph

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Hampshire England

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Hi snsn

If you are chargng a li-po 4s 3p and the amps are 6000 mah cap then lets say you are charging this pack at 1c then the most that the charger will need is 6 amps i dont charge mine at 1c i charge them at half c 3.5 amps SO the power supply that you need would be 12 volts 10 amp would be more than you need
I use the shulze charger and the suhumacher 10 amp switch mode power supply g838 any good model car shop will have them
Hope this helps

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06-07-2004 10:21 PM  13 years agoPost 8
Rob_T

rrElite Veteran

..

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Steph, you're underestimating the power supply needed. A 4S pack charges at 16.8V. To put 6A into a 4S pack means you need to take 8.4A off the 12V supply (power = volts x amps), if everything is working at 100% efficiency. Things are never 100% efficient, so add another 20% at the very least, and probably more. This means the charger will be taking a little over 10A.

Most 10A supplies will not deliver the power with sufficient regulation for the Schulze to work well, so you are risking damaging the charger if you only use a 10A supply. The manual for my 6-636 has some very explicit and dire warnings about this! (Poor input power is a quick way to kill a charger as it increases the heat generated in the power inverter).

Maybe a 20A supply would be OK especially if its a good quality one - but at your own risk!

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06-07-2004 10:29 PM  13 years agoPost 9
snsn

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NJ

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So what is the safe choice?
Can you too much amperage?

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06-07-2004 10:38 PM  13 years agoPost 10
Glenn in Den

rrKey Veteran

Longmont, Colorado area

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If your voltage is correct then extra amperage does not matter. Devices will call for the current (amperage) they want so excess available current does not matter.

Don't confuse the above with battery charging. That is different. A battery being charged does not know what it wants so you have to limit available current TO THE BATTERY (not the charger - clear as mud?).

If you want to be safe then get a power supply that is rated for 15 or 20 amps CONTINUOUS. Ignore the peak current rating and look for continuous.

That Pyramid company seems okay and seems to be the best value I've seen. Computer power supplys seem okay but you have to mod them. Astron and MFJ have been used by Hams for years and are okay.




Glenn.

I'm not really an R/C pilot, I stayed in a Holiday Inn Express last n

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06-09-2004 11:02 PM  13 years agoPost 11
Lockheed

rrApprentice

Qc, Canada

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Power Supply

I have 2 power supply, from http://www.ramboy.com, which I have been using on my 330D, for the past year, and it works super perfect.
They cost around $20, are rated up to 13 Amp. which is more then enough since a 330 D can charge at 5.5 amp. max. Forget the schultze manual with all that ``it can be done but...`` jut solder some banana plug and bingo! Hope this helps

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06-10-2004 02:50 AM  13 years agoPost 12
Rob_T

rrElite Veteran

..

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Have just checked the Schulze web site. They say the maximum current a 330D will take from its supply is 15 Amps. So it looks like a good 15A power supply is what's need. (Or a Glenn pointed out, anything above 15A is also OK).

Note that the maximum input current is quite a lot more than the maximum charge current. This is due to the inverter used to boost the charge voltage needed for charging 30 NiCds off a 12V input. (Or a 4s Lithium)

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