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Triton power supply - 3/14/2003 4:28:00 AM   
Redwind


 

Posts: 66
Joined: 10/4/2002
Status: offline 		I plan on using a Novak power supply for my soon to arrive Triton. The specs for the power supply says that it puts out 14 volts at 10 amps. The last thing I want to do is fry the new charger right off the bat. Will the Novak at 14 volts work on the Triton does it need to be strictly a 12 volt source? Thanks
       Post #: 1

Re: Triton power supply - 3/14/2003 4:44:01 AM   
Red Scholefield



Posts: 5039
Joined: 12/8/2001
From: Newberry, FL, USA
Status: offline 		[QUOTE]Originally posted by Redwind
I plan on using a Novak power supply for my soon to arrive Triton. The specs for the power supply says that it puts out 14 volts at 10 amps. The last thing I want to do is fry the new charger right off the bat. Will the Novak at 14 volts work on the Triton does it need to be strictly a 12 volt source? Thanks [/QUOTE]

Triton spec for input voltage is 10.5 to 15 volts. You should have no problem with your 14 volt supply.

_____________________________

Red S.
AMA 951 Leader Member
Disclaimer: What I have written here are my thoughts and in no manner shape or form reflect the views of RCU

(in reply to Redwind)
       Post #: 2

Triton power supply - 3/14/2003 11:46:22 PM   
JRW


 

Posts: 167
Joined: 10/31/2002
From: lancaster, CA,
Status: offline 		I want to use this thread to ask a Triton question regarding Lead-acid batteries, Li-ion batteries, and power supplies.

Power supply: Using a 12v 10amp DC supply unit

Lead Acid battery: My battery can be seen at http://www.enersysstationary.com/pdfs/US_NP24_12_01_1102.pdf

This is a 12v 24ah sealed battery (Yuasa NP 24-12B). I selected a 5 amp charge rate with the Triton. Upon commencement of charging, it will only charge at 1 amp.

Li-ion: I selected 2.5 amp charge rate. Upon commencement, charge rate fluxuates between 0.1 -0.2 amp. I raised the voltage to 7.4v, and the charge rate remains in the 0.1-0.2 amp range, mainly 0.1.

The Nicads and Nimh I've charged thus far seem to work really well, and a chieve a very high charge status. I definately like the Triton, but really don't understand why the charge rates for the PB and Li-ion are so low compared to the "available" selection from the charger.

Any light shed on this would be greatly appreciated.

Thanks,
Jim

(in reply to Redwind)
       Post #: 3

Triton power supply - 3/16/2003 10:03:34 PM   
ml3456-RCU


 

Posts: 558
Joined: 10/18/2002
From: Darien, IL, USA
Status: offline 		How long would a 12V 24 AH battery like the one listed above last as a field charger power supply. With multiple large battery packs in my new giant scale, ( Ignition, 2 radio, and one smoke battery) I probably want to top this off during the day for safety. How many mah do you need? i don't know if the standard 7 ah will have enough power to last all day, and the car is a not easy to get to.

Thanks for the help.

Mark

(in reply to Redwind)
       Post #: 4

Triton power supply - 3/16/2003 10:13:45 PM   
Red Scholefield



Posts: 5039
Joined: 12/8/2001
From: Newberry, FL, USA
Status: offline 		[QUOTE]Originally posted by ml3456
How long would a 12V 24 AH battery like the one listed above last as a field charger power supply. With multiple large battery packs in my new giant scale, ( Ignition, 2 radio, and one smoke battery) I probably want to top this off during the day for safety. How many mah do you need? i don't know if the standard 7 ah will have enough power to last all day, and the car is a not easy to get to.

Thanks for the help.

Mark [/QUOTE]

Calculate the total watt hours of energy you need.

Pack capacity X voltage for each pack, add them all up, then multiply by 1.5 to allow for charge efficiency and conversion loses.

Example:

Ignition 2000 mAh X 1.2 volts = 2.4 wh
Radio 1100 X 4.8 volts (X2 for two packs) = 10.6 wh
Smoke 1800 mAh X 4.8 = 8.6 wh

Total wh = 21.6 wh x 1.5 = 32.4

Available wh in 24 Ah X 12 volt = 288 wh

So this means (unless I've messed up the math) you can completely recharge all your packs 8 times before the 12 volt battery runs out.

_____________________________

Red S.
AMA 951 Leader Member
Disclaimer: What I have written here are my thoughts and in no manner shape or form reflect the views of RCU

(in reply to Redwind)
       Post #: 5

Triton power supply - 3/16/2003 10:38:03 PM   
u8at711



Posts: 135
Joined: 1/2/2003
From: Enfield, CT,
Status: offline 		I just got my Triton charger, I'm setting up the menus.
I have a cordless drill battery.
the battery is 12V and NIcad
so there should be 10 cells inside the case, Not visible because it's for a cordless drill.
I'm guessing that the pack is aprox 1600 mAh
I think I should set the charge current to 1.5A
The discharge current to .9A
discharge Volt/Cell .9

Do these parameters sound correct. If not someone please correct me.

(in reply to Redwind)
       Post #: 6

Triton power supply - 3/16/2003 10:40:55 PM   
Red Scholefield



Posts: 5039
Joined: 12/8/2001
From: Newberry, FL, USA
Status: offline 		[QUOTE]Originally posted by u8at711
I just got my Triton charger, I'm setting up the menus.
I have a cordless drill battery.
the battery is 12V and NIcad
so there should be 10 cells inside the case, Not visible because it's for a cordless drill.
I'm guessing that the pack is aprox 1600 mAh
I think I should set the charge current to 1.5A
The discharge current to .9A
discharge Volt/Cell .9

Do these parameters sound correct. If not someone please correct me. [/QUOTE]

Correct on the 12 volts = 10 cells.

Your settings should be fine, but if you want to measure the pack capacity at the same rate as the manufacturer you could set the discharge to 300 or 400 mA - closer to C/5 manufacturer's rate.

_____________________________

Red S.
AMA 951 Leader Member
Disclaimer: What I have written here are my thoughts and in no manner shape or form reflect the views of RCU

(in reply to Redwind)
       Post #: 7

Triton power supply - 3/17/2003 4:19:51 AM   
ml3456-RCU


 

Posts: 558
Joined: 10/18/2002
From: Darien, IL, USA
Status: offline 		Thanks Red,

Maybe I get a smaller battery. MAH=LBS!! And most field re-charging won't be only for topping off.

Mark

(in reply to Redwind)
       Post #: 8

Triton power supply - 3/25/2003 8:16:33 AM   
ChicagoGj


 

Posts: 54
Joined: 1/2/2003
From: Mundelein, IL, USA
Status: offline 		not to butt in but....coming from a duratrax charger, i have had a ton of false peaks on smaller batt's. What do you use as the best indexation of a full battery and how many Mah's should you get compared to the rating? Example-on my 7 cell 500 Mah, the charge cuts off at 125 Mah, but then after hitting it again, (on the Duratrax) I get to around 700 Mah, with not much heat or harm to the Battery seems at this point. Do you watch the amps or volts more or look for a over all Mah level?

Also, with Li packs, do you really need to discharge? If I'm getting 25 min's of flight time with my Moth on a 11.1 V/1020 Mah Kokam and use 15 min's, should I discharge a bit or can I just start the charge from that point? This goes for a 1400 Mah 7.4 Li Poly pack as well.

(in reply to Redwind)
       Post #: 9

Triton power supply - 3/25/2003 4:52:09 PM   
Red Scholefield



Posts: 5039
Joined: 12/8/2001
From: Newberry, FL, USA
Status: offline 		[QUOTE]Originally posted by ChicagoGj
not to butt in but....coming from a duratrax charger, i have had a ton of false peaks on smaller batt's. What do you use as the best indexation of a full battery and how many Mah's should you get compared to the rating? Example-on my 7 cell 500 Mah, the charge cuts off at 125 Mah, but then after hitting it again, (on the Duratrax) I get to around 700 Mah, with not much heat or harm to the Battery seems at this point. Do you watch the amps or volts more or look for a over all Mah level?

Also, with Li packs, do you really need to discharge? If I'm getting 25 min's of flight time with my Moth on a 11.1 V/1020 Mah Kokam and use 15 min's, should I discharge a bit or can I just start the charge from that point? This goes for a 1400 Mah 7.4 Li Poly pack as well. [/QUOTE]

There has been some discussion on lithium-polymer packs connected in series that you need to charge and discharge each cell by itself once in a while to make sure they stay balanced.

I have added an extra lead (2 cell pack) in order to do this. I noted that on a 3 Ah pack that the cells were quite a bit different in open circuit voltage, but on smaller packs like the 1020 they seemed to stay pretty well together when flown in a lite stick and discharged at 2 amps.

_____________________________

Red S.
AMA 951 Leader Member
Disclaimer: What I have written here are my thoughts and in no manner shape or form reflect the views of RCU

(in reply to Redwind)
       Post #: 10

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