Duo3 settings
08-13-2010, 06:40 PM
#16
hi.. what it the time set (35, 12 or 5 mins) has elapsed but your charging/discharging target is not yet reached?
08-13-2010, 06:55 PM
#17
08-13-2010, 07:00 PM
#18
also, if the 5400mah 4s 50c pack is being charged at 5.5a but at the rate of 2c instead of 1c, what would be the effect?
08-13-2010, 07:26 PM
#19
a few more queries...
what relation/effect has the charger's wattage (180w / port) to the charging?
i'm using Muchmore PS 24A, would you think that is enough for the duo3? i used to charge 2 4s packs at the same time..
also, if the 5400mah 4s 50c pack is being charged at 5.5a but at the rate of 2c instead of 1c, what would be the effect?
thanks so much guys
what relation/effect has the charger's wattage (180w / port) to the charging?
i'm using Muchmore PS 24A, would you think that is enough for the duo3? i used to charge 2 4s packs at the same time..
also, if the 5400mah 4s 50c pack is being charged at 5.5a but at the rate of 2c instead of 1c, what would be the effect?
thanks so much guys
Amps x Volts = Watts
Some examples for your case:
1C: 5.4 Amps x 16.8 Volts = 90.72 Watts (16.8V being the full charge for a 4S)
2C: 10.8 Amps x 16.8 Volts = 181.44 Watts (which a Duo can’t quite do with one port, but close)
Assuming the Muchmore supply is the typical 13.8 Volts, it’s capable of about 330 Watts. Need to reduce this to account for charger efficiency and allow some headroom, I’d recommend figuring on about 250 Watts of charge power at most for reliable operation, proportionally lower if it’s really a 12V supply. This needs to be split for the 2 ports of the Duo. So you could charge two 4S at a little over 7 Amps each with this supply.
250 Watts / 2 ports = 125 Watts per port
125 Watts / 16.8 Volts = ~7.4 amps
Perhaps a little over 6 Amps per if it's a 12 Volt supply.
08-13-2010, 08:32 PM
#20
thanks for these great learnings!..
going to the duo3, if the settings are: 5.4A at 2C (default), will it be charging at 2C as set or at 1C? i understand that the 1C for a 5400mah pack is 5.4A.
In short, if you want 2C charging, just set it at 2C although the amp is set at its 1C equivalent?
going to the duo3, if the settings are: 5.4A at 2C (default), will it be charging at 2C as set or at 1C? i understand that the 1C for a 5400mah pack is 5.4A.
In short, if you want 2C charging, just set it at 2C although the amp is set at its 1C equivalent?
08-14-2010, 08:24 AM
#21
thanks for these great learnings!..
going to the duo3, if the settings are: 5.4A at 2C (default), will it be charging at 2C as set or at 1C? i understand that the 1C for a 5400mah pack is 5.4A.
In short, if you want 2C charging, just set it at 2C although the amp is set at its 1C equivalent?
going to the duo3, if the settings are: 5.4A at 2C (default), will it be charging at 2C as set or at 1C? i understand that the 1C for a 5400mah pack is 5.4A.
In short, if you want 2C charging, just set it at 2C although the amp is set at its 1C equivalent?
If you set charger at 2C, charger will try and charge a pair of 5400mah lipos at 10.8amps, but due to your power supply's power output, charger will limit charge current and you'll see less than 10.8amps, but more than 5.4amps. If you set charger at 1C, the charge will charge at 5.4amps since your power supply can supply the required wattage for that charge rate to both ports.
08-14-2010, 11:05 AM
#22
Tech Adept
It takes approx 1hr at 1C to charge. At 2C it cuts the CC part of the charge in half since the current has been doubled. But the CV part now starts from a higher current since it was doubled so 2C will not cut the time in half. Expect something like a 40% reduction in time, so 35, 36min. It depends on how far down the lipo was run too, so its hard to quote a precise time.
Duo3 - I didn't notice until it was pointed out, but Hyperion's manual tells you that to run at full power (180watts per port), charger requires 14.5+v DC input. That means most 13.8v RC oriented PS will not run Duo3 at full power. Hyperion doesn't explain what this means as far as charger power reduction if you supply is not 14.5+v.
Otherwise you need PS with more than about 430watts. It should be a 15v output power supply if you want to run Duo3 at full power. Check the 1st page of the unified manual that cover the Duo3, the table at the bottom of the page -
http://media.hyperion.hk/dn/eos/EOS-...2-MAN-EN46.pdf
AMain's Pro 40 power supply looks like a good choice, but its a 13.8v supply.
Duo3 - I didn't notice until it was pointed out, but Hyperion's manual tells you that to run at full power (180watts per port), charger requires 14.5+v DC input. That means most 13.8v RC oriented PS will not run Duo3 at full power. Hyperion doesn't explain what this means as far as charger power reduction if you supply is not 14.5+v.
Otherwise you need PS with more than about 430watts. It should be a 15v output power supply if you want to run Duo3 at full power. Check the 1st page of the unified manual that cover the Duo3, the table at the bottom of the page -
http://media.hyperion.hk/dn/eos/EOS-...2-MAN-EN46.pdf
AMain's Pro 40 power supply looks like a good choice, but its a 13.8v supply.
08-14-2010, 12:46 PM
#23
I did a bunch of digging last night - I was curious about the 14.5+v required for the Duo3 to deliver full power and how much diff that really makes. I finally found where someone actually tested it both ways on RC Groups.
Full power is 180watts per port and requires a power supply with higher than 14.5v input. The testing with a 18v input source did verify that the Duo3 delivered 180watts per port. With a 13.8v power supply, they tested the power output at 160watts per port, or a 20watt power decrease due to the lower voltage input source. Thats a little over an 11% decrease in output power.
Along the way to finding this info, I saw several who had tested the Duo3 for efficiency using wattmeters and testing was indicating either 81 or 82% efficiency.
Full power is 180watts per port and requires a power supply with higher than 14.5v input. The testing with a 18v input source did verify that the Duo3 delivered 180watts per port. With a 13.8v power supply, they tested the power output at 160watts per port, or a 20watt power decrease due to the lower voltage input source. Thats a little over an 11% decrease in output power.
Along the way to finding this info, I saw several who had tested the Duo3 for efficiency using wattmeters and testing was indicating either 81 or 82% efficiency.
08-14-2010, 02:03 PM
#24
thanks for these great learnings!..
going to the duo3, if the settings are: 5.4A at 2C (default), will it be charging at 2C as set or at 1C? i understand that the 1C for a 5400mah pack is 5.4A.
In short, if you want 2C charging, just set it at 2C although the amp is set at its 1C equivalent?
going to the duo3, if the settings are: 5.4A at 2C (default), will it be charging at 2C as set or at 1C? i understand that the 1C for a 5400mah pack is 5.4A.
In short, if you want 2C charging, just set it at 2C although the amp is set at its 1C equivalent?
5.4A with 2C will charge at 5.4A. Note with a 2C setting you cannot turn the Amps above 10.8, well assuming the capacity is set at 5400mAh. Set to 3C and then the Amps can be turned past 10.8A. Set to 1C and you are limited to 5.4A, etc.
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