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Power source & ESC

Old 11-01-2018, 10:12 PM
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Jack_Hammer
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Default Power source & ESC

I was sit'n around babysitting charging lipos and getting bored with reading, I happened to ponder a mere curiosity.

If all lipos are charging while you are setting in electronic systems into a new bird and you need to do a bench test on the motor....how would you supply power?
Perhaps through the charger on say very low Amp...... I would test out the theory except I have no desire to be burn out a perfectly good esc.

Thoughts of wisdom?
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Old 11-01-2018, 11:04 PM
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Panther
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I have a battery strictly for bench testing.
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Old 11-02-2018, 12:34 AM
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Jack_Hammer
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Originally Posted by Panther View Post
I have a battery strictly for bench testing.
As do I, the thought of using the charger however did occur as a potential. However I'm not about to be the first person to literally try it. I'm not even on the list.

Just thought for discussion.
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Old 11-02-2018, 03:21 AM
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ron_van_sommeren
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Originally Posted by Jack_Hammer View Post
... Perhaps through the charger ...
Chargers are switched-mode power supplies. Their output may not be clean enough to power another smps, i.e. your brushless ESC. Don't know what would happen though.
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Old 11-02-2018, 04:09 AM
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Jack_Hammer
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Originally Posted by ron_van_sommeren View Post
Chargers are switched-mode power supplies. Their output may not be clean enough to power another smps, i.e. your brushless ESC. Don't know what would happen though.
an SMPS transfers power from a DC or AC source (often mains power) to DC loads, such as a personal computer, while converting voltage and current characteristics.

Sooooo does a charging unit convert from ac to DC bef it gets to the battery?
I'm thinking it's AC. The smps on the ESC "may not" be set up to transfer from an AC source but rather DC (from the lipo)?

......and poof..... there goes yer esc?
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Old 11-02-2018, 01:29 PM
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solentlife
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I have tried in the past with B6 and similar chargers - they all failed to provide power correctly. I believe that they are not suitable - they expect to have voltage BACK at them ... such as when you connect a battery and select voltage - they default of if the detected voltage of item is outside range.

But a regulated PSU may work ?

Nigel
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Old 11-02-2018, 05:52 PM
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Wildflyer
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I have a 55 amp highly regulated 13.5 volt power supply.
It was a bench supply for testing mobile CB radios. My friend used to have a CB shop.
I have it set up to power a couple of small chargers and to provide a stable DC voltage on my electronics work bench.

I also have an 11 amp supply for the same purposes.



This set up also gives me a power connection just like a 3cell battery, just about 1 volt high, but it works great for testing. I have a 6 foot extension cord I can use to reach the plane.


But wouldn't you know, when I test an airplane on the bench, I usually grab a Lipo that is too old to go flying. I set up all that stuff before I had enough Lipo's to afford one in here.
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Old 11-02-2018, 07:17 PM
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solentlife
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That's same as me ... old LiPo's 'never die' so to speak ... they have plenty of use even if they won't fly the model.

Same as old ESC's ... often its only the speed part that fails ... but the BEC part is fine. Use for binding Rx's ... powering servo testers ... an old ESC / BEC and old LiPo ...

Nigel
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Old 11-03-2018, 10:10 AM
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I remember back in the 90's every thing was sold in kits, it will take some getting used to with buying things separately, but I am sure the kits will fly just the same if not better today as vs yesterday....
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