RunRyder RC Helicopter Topic - Power Supplies For 6S and Larger Chargers

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e-Electric Batteries & Chargers > Power Supplies For 6S and Larger Chargers

NQNA
Veteran
Location: Ohio - USA

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I'm looking for a charger and a power supply to power it. Does anybody know a good spec (volts, amps, watts) for a power supply for a charger like the Hyperion EOS 0720i NET3 or EOS 0615i DUO3?

10-09-2009 01:04 AM

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Hate_To_Crash
Senior Heliman
Location: Near Lake Tahoe

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This is the one I purchased. Charging my Hyperion 5S 3300 Batts on a 720i in 11 mins. Pulls 44 amps from the supply.. Nothing gets hot or stressed

http://www.amazon.com/Pyramid-PS52K...t/dp/B0002BWC0I

10-09-2009 01:52 AM

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Ace Dude
Elite Veteran
Location: USA

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The 720i is a 250W charger so there's no way one 720i it will pull 44A by itself.

Here's what the 720i NET3 manual says:

"It is critically important that you use either a fully charged 12V~24V lead-acid automobile battery (or better, deep-cycle marine battery) - or a high quality AC-DC power supply in the range of 12V to 28V DC output, with minimum current rating of 10A. When charging high voltage batteries at high current the AC/DC Power Supply (PS) should be 14.5V minimum with rating of 350W or more, to insure best performance. Note that PS load control features DO allow you to use lower-rated power supplies reliably, but that total charger output wattage will be limited accordingly."

I have Astron, Alinco, and MJF power supplies and they are all purpose built power supplies and they all work fine.

If you want every last drop out of your 720i you'll need a 15v or higher power supply.

10-09-2009 02:05 AM

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fenderstrat
rrProfessor
Location: Aston,Pa

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Quote
Charging my Hyperion 5S 3300 Batts on a 720i in 11 mins.

how many amps are you charging at??

PerformancePlusRC field rep
Compass Helis Support Team
Mini Titan/SE
HBK2
Futaba FASST

10-09-2009 02:20 AM

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Hate_To_Crash
Senior Heliman
Location: Near Lake Tahoe

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Then I can only guess the meter on the power supply is inaccurate.. Will look closer next time I charge.

And yes I have it set for 14.5 volts actually. Strange you mentioned it..

To answer the above question I am charging at 16500 on the 720i

10-09-2009 02:21 AM

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fenderstrat
rrProfessor
Location: Aston,Pa

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Quote
To answer the above question I am charging at 16500 on the 720i

so you are charging at 5C.I have been charging at 2 and 3 C for 2 years now but have never tried to go any higher.

do you have any long term cycle life or performance data yet,this is very interesting stuff,as charge times are really comming down now.But how are the packs holding up at these rates?

PerformancePlusRC field rep
Compass Helis Support Team
Mini Titan/SE
HBK2
Futaba FASST

10-09-2009 02:25 AM

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Hate_To_Crash
Senior Heliman
Location: Near Lake Tahoe

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That was the first time. I upgraded all my chargers and batt's just to get 15 min charges if I needed too.

Do not know any long term effects. Going back to my normal 3C. It is what I am most comfortable with. Hopefully someone can chime in that has been doing 5C charges for a while.

10-09-2009 03:28 AM

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dfrazier
Senior Heliman
Location: Lake Charles, La

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I use an Iota 55 amp battery charger. I run 2 TP 1010C chargers at full power and 2 50watt 6-cell chargers at one time. Here is where I got mine.

http://store.solar-electric.com/ioten55amp12.html

They also go up to 90 amp I believe and also different voltages.

David Frazier

10-09-2009 03:44 AM

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TJinGuy
Elite Veteran
Location: Socorro, NM - USA

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So lets get something straight here

You said

Quote
To answer the above question I am charging at 16500 on the 720i

Before that you said it was a 5s 3300 pack. The 720i maxes out at 250w. That equated to a 11.9A max charge rate on a 5s pack. You can set the charger to 16.5A all day long but it will never charge a 5s pack at that rate. So that equates to less than 20A draw off the power supply.

---

I use a 15V 350W power supply I got off eBay for $45. Works great!

- Chris

TJinTech
Team New Mexico

10-09-2009 04:39 AM

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Hate_To_Crash
Senior Heliman
Location: Near Lake Tahoe

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You guys are a tough group. Guy comes on looking for advice on power supplies and the topic turns into this.

So here is the photo truth. A 720i maxed on on 55 amp power supply charging a 5S at 5C.

So I guess we are both a little off

After 11 mins charge wires get a little warm.

10-09-2009 06:08 AM

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Ace Dude
Elite Veteran
Location: USA

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Quote
You guys are a tough group. Guy comes on looking for advice on power supplies and the topic turns into this.

Sorry if you feel that way, but when someone comes looking for advice it's important that they get the right advice.

What I posted above is right out of the 720i NET3 manual. Now, if you follow the manual's recommendation for a 14.5v 350W power supply you'll find you need a 24.1A or greater power supply. Now, I never like running anything at its limit so I'd recommend a good quality 30A power supply. Of course, if you're not maxing out the charger you can get away with using a smaller power supply.

My next power supply will likely be an Iota.

10-09-2009 02:54 PM

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TJinGuy
Elite Veteran
Location: Socorro, NM - USA

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Quote
So I guess we are both a little off

Your charger is showing this at the start of a charge.
12.94A * 19.34V = 250.26W

At the end of a charge it will be showing
250W/21V = 11.9A

Any way you slice it the charger is maxed out at 250W. Knowing that 250W is the max output, we can make an educated guess as to what the input needs to be. If you use a 15V power supply (this covers the chargers minimum voltage requirement for full output) we find that

250W/15V = 16.6A

Now this is how much amperage the charger needs for the output but not the full amount it needs due to voltage conversion losses and the fact that the charger itself needs a little power. I usually tack on 20% to be safe but it looks like the manual is tacking on more like 40% (this is likely to make sure you have a little overhead).

16.6A + 20% = 19.9A
16.6A + 40% = 23.3A

This is how you figure out how large of a power supply you need. A more straight forward approach is to take the max output wattage, add 20% (at a minimum) and then divide by the input voltage you choose. That will tell you the amps needed.

250W + 20% = 300W
300W/15V = 20A

- Chris

TJinTech
Team New Mexico

10-09-2009 04:32 PM

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Hellsiege
Senior Heliman
Location: Colorado Springs, CO

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I got a checkpoint 25a from ReadyH - that seems to be working great on my 615duo (15a 6s duo model) - I'm not charging above 1c and have it cranked to 15.5v (max) but seems to do fine on the 6s-5000mah packs I'm charging. About 25min of charging (charge rate drops to .1 - .8) and seem to finish balancing around the 40-45min mark.

10-09-2009 05:06 PM

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Ace Dude
Elite Veteran
Location: USA

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As mentioned in my first post, the best place to start when sizing a power supply for a charger is to RTFM.

As such, Hyperion recommends a 14.5v 350W power supply. Now:

350W/14.5v = 24.14A

Now, add 20% for contingency and 30A power supply is a nice logical choice. The same as recommended in my previous post....

10-09-2009 06:06 PM

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TJinGuy
Elite Veteran
Location: Socorro, NM - USA

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Too bad the OP asked about more chargers than the 720i

Does your power supply recommendation cover the other charger?

- Chris

TJinTech
Team New Mexico

10-09-2009 06:29 PM

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MrMel
rrProfessor
Location: Lidingo, Sweden (GMT+1)

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Ace, You double-add the 20%, its not needed, (safety net is already included in the manual's data...)

I run 2 x 720 off 40 amp 15v supplies.

I run the SPS-9400 (sold under various names), expensive but quiet.
Most important is that it need to be able to deliver, constant.
Many el cheapo PC powersupplies dies for that reason, they wasnt meant to run continously at their rating.

My site: http://heli.dacsa.net

10-09-2009 06:30 PM

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MrMel
rrProfessor
Location: Lidingo, Sweden (GMT+1)

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a cheap powersupply is these;

http://cgi.ebay.com/24V-DC-14-6A-35...=item587e71fbf9

Noisy, but absolute brilliant for field charging since they are small, I mean, really small.

My site: http://heli.dacsa.net

10-09-2009 06:41 PM

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Ace Dude
Elite Veteran
Location: USA

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Quote
Too bad the OP asked about more chargers than the 720i Does your power supply recommendation cover the other charger?

I teach principles, not processes. The 615i DUO3 is available on-line just as easily as the 720i NET3 manual is. It's quite easy to translate what I did for the 720i NET3 to the 615i DUO3. My example was specific to the 720i NET3 as noted.

10-09-2009 06:41 PM

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Ace Dude
Elite Veteran
Location: USA

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Quote
Ace, You double-add the 20%, its not needed, (safety net is already included in the manual's data...) I run 2 x 720 off 40 amp 15v supplies. I run the SPS-9400 (sold under various names), expensive but quiet. Most important is that it need to be able to deliver, constant. Many el cheapo PC powersupplies dies for that reason, they wasnt meant to run continously at their rating.

No biggie, really. An extra 20% of contingency isn't going to hurt a thing.

10-09-2009 06:44 PM

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MrMel
rrProfessor
Location: Lidingo, Sweden (GMT+1)

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