Tasajara
Active Member
Well I bought 4 of these NEW AFRO ESC's. There are designed just for Multirotors by timecop and SimonK. This combination of hardware and firmware expertise will make for a great Multirotor esc.
First thing I noticed was they don't have any heat sinks.... Hummm that is different. I got mine all wired up and did a 5 min hover and they were just a little warm if any at all.
These went on my xRotor IFrame FPV Quad. I also bought Switch-mode BEC 5V/6V 3A, Max 5A Low RF Noise UBEC from eBay to go on this quad. Guess you may be thinking why I bought this when you can power the Control board and RX from one ESC.
I have been doing a reading and have found some cool info and a few test to bring me to this upgrade.
Take an esc, powered by 3s battery to get 5 volts out to power these items it has to drop some of this voltage. Thus making a little heat. And we know what heat does.... limit current flow.
Now that we are heating up just one esc to power all my controls. This in turn will slow the RPM on this esc, Making an imbalance. Now my control board has to correct for the slower motor.
In comes the Switch-mode UBEC, now I power the controls from the switching UBEC, thus freeing up the one esc to just power the motor. Now I can pull the last red wire so none of the
esc's have any extra load other than controlling the motor. Also if you have extra add on's like GPS ect the UBEC will work much better. The one I got has a metal shield to protect from extra RF freq.
And it being a switching type it want build up heat like a linear type does.
Here is a quote from Jesolins....On a well know forum on why not to use the esc bec.
"Specifics:
Sure you can do that but it is not a multicopter best practice for reliability...so by leaving your ESC 5v BECs connected you will also get:
1. Extra Vcc noise to your flight controllers potentially causing inaccuracies and failure.
2. ESC BECs heating up dissimilarly causing variations in ESC response such as oscillations and TBE.
3. Possibly even more EMF to cause your compass and GPS if fitted to provide erroneous data.
4. High quality ESC's that are being designed specifically for multicopters would not have BECs on them. We will then no longer have to make do with ESC's that are designed for aircraft and Helicopter use"
Here is the test I ran across about the heating up of an esc causing less rpm's
High ESC temp reduces power
Ok enough for why I swapped to the UBEC... so time will tell if this upgrade will make my flights even smoother..... I really hope so..
Here are a few pics of the esc and ubec I installed.
- - - Updated - - -
Oh yeah it does fly very smooth, will have to do an FPV flight to get a good feel on this upgrade
First thing I noticed was they don't have any heat sinks.... Hummm that is different. I got mine all wired up and did a 5 min hover and they were just a little warm if any at all.
These went on my xRotor IFrame FPV Quad. I also bought Switch-mode BEC 5V/6V 3A, Max 5A Low RF Noise UBEC from eBay to go on this quad. Guess you may be thinking why I bought this when you can power the Control board and RX from one ESC.
I have been doing a reading and have found some cool info and a few test to bring me to this upgrade.
Take an esc, powered by 3s battery to get 5 volts out to power these items it has to drop some of this voltage. Thus making a little heat. And we know what heat does.... limit current flow.
Now that we are heating up just one esc to power all my controls. This in turn will slow the RPM on this esc, Making an imbalance. Now my control board has to correct for the slower motor.
In comes the Switch-mode UBEC, now I power the controls from the switching UBEC, thus freeing up the one esc to just power the motor. Now I can pull the last red wire so none of the
esc's have any extra load other than controlling the motor. Also if you have extra add on's like GPS ect the UBEC will work much better. The one I got has a metal shield to protect from extra RF freq.
And it being a switching type it want build up heat like a linear type does.
Here is a quote from Jesolins....On a well know forum on why not to use the esc bec.
"Specifics:
Sure you can do that but it is not a multicopter best practice for reliability...so by leaving your ESC 5v BECs connected you will also get:
1. Extra Vcc noise to your flight controllers potentially causing inaccuracies and failure.
2. ESC BECs heating up dissimilarly causing variations in ESC response such as oscillations and TBE.
3. Possibly even more EMF to cause your compass and GPS if fitted to provide erroneous data.
4. High quality ESC's that are being designed specifically for multicopters would not have BECs on them. We will then no longer have to make do with ESC's that are designed for aircraft and Helicopter use"
Here is the test I ran across about the heating up of an esc causing less rpm's
High ESC temp reduces power
Ok enough for why I swapped to the UBEC... so time will tell if this upgrade will make my flights even smoother..... I really hope so..
Here are a few pics of the esc and ubec I installed.
- - - Updated - - -
Oh yeah it does fly very smooth, will have to do an FPV flight to get a good feel on this upgrade
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