Charging thru Smart Fly regulator  
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All Forums >> Radios, Batteries, Clubhouse and more >> RC Radios, Transmitters, Receivers, Servos, gyros >> Radio Manufacturer Direct Support >> Smart-Fly (Quest Engineering) Support Forum >> Charging thru Smart Fly regulator
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Charging thru Smart Fly regulator - 3/23/2007 5:37:14 AM   
rmflyfish



Posts: 45
Joined: 3/19/2005
From: Colorado Springs, CO, USA
Status: offline 		Hi Robert:

If I charge one battery at a time through the Smart Fly Super regulator charging port, will I avoid 'issues' of the common ground. Or do I have to completely disconnect the batteries and charge them one at a time, off the regulator, to avoid those problems. I'll be using a Pro-Peak Prodigy II charger, charging dual Fromeco 7.4V 2400 mAh cells.

Thanks in advance, your service and products are 'Top Notch!'

Bob P
       Post #: 1

RE: Charging thru Smart Fly regulator - 3/23/2007 1:10:45 PM   
bubbagates



Posts: 8162
Joined: 5/30/2004
From: Elizabethtown, PA, USA
Status: offline 		Hi Bob,

I have been charging both batteries at the same time without issues. This is on a regulator that I have had in this plane for around 1.5 yrs, maybe a bit less. I've done it with 2 Triton chargers connected to each charging lead at the same time and lately with the Fromeco 3 port charger and have never had any problems. I'm about to actually test this with the new Fromeco cube as soon as it gets here.

All the rest of my planes I have charge type switches in front of the regulator so I use them so I am not going through the regulator at all

Robert does make some excellent products.

_____________________________

Bill James
Normal is not something to aspire to, it's something to get away from

(in reply to rmflyfish)
       Post #: 2

RE: Charging thru Smart Fly regulator - 3/23/2007 3:14:36 PM   
rrritchey


 

Posts: 621
Joined: 9/29/2004
From: Phoenix, AZ, USA
Status: offline 		Hi Bob,
If you charge 1 battery at a time you will not have the common ground problem if your charger does not support common ground charging. What happens when you have a charger(s) that does not work with a common ground system is this. Those chargers sense the current to the battery on the negative (ground) lead. When you hook 2 of them up, its possible that one charger will sink more current than the other charger on the negative lead, in essence it is sinking some of the current the other charger is sourcing on its positive lead. That means that that the other charger will keep trying to increase its source current to get its negative lead current sense up to where it wants to charge the battery. What this ends up doing is putting too much current into that battery during charge.
Please let me know if you have any other questions.


_____________________________

Robert Ritchey
Owner, Smart-Fly

(in reply to bubbagates)
       Post #: 3

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All Forums >> Radios, Batteries, Clubhouse and more >> RC Radios, Transmitters, Receivers, Servos, gyros >> Radio Manufacturer Direct Support >> Smart-Fly (Quest Engineering) Support Forum >> Charging thru Smart Fly regulator
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