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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Is this a redundant system?
04-01-2012 01:42 AM  7 years ago
GetToDaChopper

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Las Vegas , NV

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No no no....If you have an external BEC the one in the ESC HAS TO BE disabled
this is not always true, some YGE esc have no problem with running the built in bec and a additional bec at the same time, if fact that's how mine is running right now......

from the yge esc manual......
The plus (red) wire of the receiver cable does not need to be
disconnected.
Several ESC’s can be connected to a single receiver
without any special precautions (Parallel use of all the
BECs). The total maximum available load is the sum of the
individual BECs.
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04-01-2012 01:53 AM  7 years ago
MichiganFlyer

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Lansing,MI

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Well I just did some testing. I lowered the BEC voltage in the Castle to 5.0V. Plug in the main pack first or the rx pack. Makes no difference. Unplug either one and I still have servo control an no loss to the rx. Hmm.Friends don't encourage friends to fly helis! It can cause part shortages.
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04-01-2012 01:57 AM  7 years ago
MichiganFlyer

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Lansing,MI

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I think I will leave it this way. No lawn darting due to a wire rub through or solder failure. I like that piece of mind.Friends don't encourage friends to fly helis! It can cause part shortages.
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04-01-2012 02:00 AM  7 years ago
ThumbBumper

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A little to the right and down!

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Actually guys there is a way of doing it, but I'm not suggesting that MichiganFlyer experiment with it. This would require some serious bench testing before you were to ever ready get off the ground.

In theory, if you were to isolate each of the regulators from each other with a diode then it should work. The only problem would be that you are going to lose 0.6V (+/-) from each because of the diode drop. If the BEC and regulator was able to output a slightly higher voltage to make up for the diode drop then it would be fine. Problem is if you reduce the output voltage from the BEC and the regulator currently set at 5.1V, then you will only be seeing 4.5V at the receiver/servos which would be cutting it a bit thin.

The best case would be if the regulator and BEC were adjustable and they could both set to 5.6V, then you would wind up with a solid and redundant 5.0V supply.

Bob
If it ain't broke, go fly some more!
http://facebook.com/groups/TORCHS/
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04-01-2012 02:05 AM  7 years ago
Wave

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Illinois

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I believe it simply not proper electrical design as one supply could potentially backfeed the output of the other which may cause damage if the voltage differential was large.

That said you could isloate one supply from the other using a diode, but would need to use diodes on both supplys to keep the voltage matched due to the .7 volt drop.
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04-01-2012 02:08 AM  7 years ago
MichiganFlyer

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Lansing,MI

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Oh I am not going to try that. I think I like my set up. It works. never a power loss to the rx. I like that.Friends don't encourage friends to fly helis! It can cause part shortages.
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04-01-2012 02:16 AM  7 years ago
Kaborkian

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Lafayette, LA USA

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Don't need a diode...the voltage regulator is a transistor, which has the same reverse power protection that a diode offers. It will shut off and prevent reverse power flow just like a diode.
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04-01-2012 02:20 AM  7 years ago
MichiganFlyer

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Lansing,MI

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I was wonder that. Solved my questions if one pack has a different voltage than the other. I am sure they did when I flew today.Friends don't encourage friends to fly helis! It can cause part shortages.
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04-01-2012 02:31 AM  7 years ago
MichiganFlyer

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Lansing,MI

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Oh, to point out, I had 2 charged packs. One in the heli and another one. When my first pack was done I landed, took the canopy of and replaced the 6S pack. Took back of and flew the next pack. The whole time the rx pack connected and the rx and tx on.Friends don't encourage friends to fly helis! It can cause part shortages.
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04-01-2012 02:55 AM  7 years ago
ShuRugal

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Killeen, TX

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I think I like my set up. It works. never a power loss to the rx.
until the two regulators burn each other out from interference and both fail.
AMA 700159
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04-01-2012 03:02 AM  7 years ago
Kaborkian

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Lafayette, LA USA

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All of you who are using 2 parallel wired server supplies to power your charged...are they working?

This is the same thing...
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04-01-2012 03:07 AM  7 years ago
MichiganFlyer

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Lansing,MI

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Thanks! Now I know I am good to go!Friends don't encourage friends to fly helis! It can cause part shortages.
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04-01-2012 04:35 AM  7 years ago
GetToDaChopper

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Las Vegas , NV

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All of you who are using 2 parallel wired server supplies to power your charged...are they working?

This is the same thing...
not exactly, server power supplies are used in series and the BEC's that we are talking about here are used in parallel, but you were sort of close......
until the two regulators burn each other out from interference and both fail
well like i said before, not with some ESC's BEC's such as some YGE ESC's whos BEC's can be used with other BEC's at the same time with Noproblamos.......
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04-01-2012 04:44 AM  7 years ago
MichiganFlyer

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Lansing,MI

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He did say parralel not series about the PS systems. I have thought about paralleling two PS's and parallel another two then series them. but that is another story.Friends don't encourage friends to fly helis! It can cause part shortages.
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04-01-2012 05:19 AM  7 years ago
S Crutchfield

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Arkadelphia,Ar. usa

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edited
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04-01-2012 05:19 AM  7 years ago
GetToDaChopper

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Las Vegas , NV

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He did say parralel not series about the PS systems. I have thought about paralleling two PS's and parallel another two then series them. but that is another story.
and like i said "server power supplies are used in series" to step up the voltage to 24 volts when using two 12 volt server power supplies, i don't know why someone would ever want to run them in "parallel" as it serves no purpose other than to make sure your charger always has power in case one fails ??? lol

if you run two 12 volt 40 amp server power supplies in "series" you will get a output of 24 volts 40 amps BUT if you run two server power supplies in "parallel" you will get a output of 12 volts 40 amps (not 12 volts 80 amps), oh and if one fails in "parallel" you still get 12 volt 40 amps.....
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04-01-2012 06:30 AM  7 years ago
rexxigpilot

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rexxig2@comcast.net

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if you run two 12 volt 40 amp server power supplies in "series" you will get a output of 24 volts 40 amps BUT if you run two server power supplies in "parallel" you will get a output of 12 volts 40 amps (not 12 volts 80 amps), oh and if one fails in "parallel" you still get 12 volt 40 amps.....
Please explain that one for me? It is very common to run power supplies in parallel to increase the current (amps) capacity. Almost all power supplies can be hooked up in parallel. Some can't be connected in series.
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04-01-2012 06:45 AM  7 years ago
GetToDaChopper

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Las Vegas , NV

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sorry i'm mistook what a person had told me, if you run them in "parallel" i guess it DOES double the wattage but any power supply with output amperage of over say around 50.0 amps really does not help todays high power charger like a power lab 8, it will need a power supply with at least 24 volts at 50.0 amps to achieve it full output of 1344 Watt so if this lets say is a 3000 watt power supply and is let's say a 20 volt 150 amp output thats not going to let a power lab of any model achieve it's full output, but i think i should also point out that the more you stack power supplies in series the more your efficiency of the current you pull off the 110 household line vs the current that goes into your LiPo batteries goes into the toilet as well.
i think anytime you can use 1 power supply vs 2 or 3 in series for high power charging the more efficient your charging station will be unless you do what i do when charging smaller cell batteries with the charging station i built, i to have a dual power supply charging station but whenever i'm only charging a battery like a 3 cell or so i only use one of the power supplies with a charger input of 12.8 volts 41.8 amps which is more than enough to allow my power lab 6 to charge at 6C or more and still use the 110 line current efficiently without a lot of waste, so multiple power supplies can give the user more flexibility and efficiency if used correctly.
Some can't be connected in series
they can if modded by someone who knows what they are doing which mostly isn't me... lol
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04-01-2012 06:48 AM  7 years ago
3dgimble

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Rochester

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You should not run 2 power sources, to start with the switching frequencies are different on ESC and BEC...., will create havoc, maaann stop debating this, just don't do it!
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04-01-2012 06:55 AM  7 years ago
GetToDaChopper

rrElite Veteran

Las Vegas , NV

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there is no debate here, what part of....
The plus (red) wire of the receiver cable does not need to be
disconnected.
Several ESC’s can be connected to a single receiver
without any special precautions (Parallel use of all the
BECs). The total maximum available load is the sum of the
individual BECs.
don't you understand as this is straight from my YGE ESC manual and is the way i have been running mine for a long long time and Noproblamo.

or just to be safe you could use a Western Robotics Glitch Buster Opto-Isolator with your ESC.......
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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Is this a redundant system?
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