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HomeRC & Power✈️Aircraft🚁Helicoptere-Electric Battery-Charger-pSupply › Powerlab 6 charging station
03-13-2014 04:26 AM  6 years ago
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Noble 373

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Destrehan La

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Powerlab 6 charging station

Just finished my new charging station today. What do you guys think?
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03-13-2014 03:18 PM  6 years ago
Twrecks600

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Nice and clean. I like it!!Team me
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03-13-2014 06:48 PM  6 years ago
Noble 373

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Thanks bud!
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03-14-2014 02:04 AM  6 years ago
Gregor99

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Looks good. Nice supply. The thing I like about the Meanwells is that you can turn up the voltage to clear the buck boost transitions.Revolectrix Beta Team
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03-14-2014 02:24 AM  6 years ago
Retired2011

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How much voltage would you need to clear the transitions?
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03-14-2014 04:33 AM  6 years ago
Gregor99

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"Loaded voltage" above 26.5v should do it. To see the loaded voltage on the Powerlabs, use the software and graph the supply voltage. The graph will display the loaded and unloaded. You can't use voltage on the console as its closer to RMS.Revolectrix Beta Team
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11-16-2014 06:54 AM  6 years ago
rcflyerheli

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The thing I like about the Meanwells is that you can turn up the voltage to clear the buck boost transitions.
What's this buck boost transition? I am putting together two DPS 1200s in series to get 24.8v. I am also already running 24v on a Chargery setup, and a pre purchased assembled set of the DPS 1200s in series.

I can read directions, and solder pretty well, but I am a novice at EE. So what do they do, and how do they affect my chargers?

Thanks.
Logo 700, Specter 700, Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
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11-16-2014 02:05 PM  6 years ago
Ace Dude

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Just finished my new charging station today. What do you guys think?
Nice job! The Mean Well power supply will serve you well.
  
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11-17-2014 03:18 AM  6 years ago
Gregor99

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Western Wa

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What's this buck boost transition?
This occurs when the charger's input voltage is close to the pack voltage. The charger's DC-DC converter toggles between boost mode and buck mode. This can cause the charge current to bounce around until the pack voltage raises high enough so the DC-DC converter can remain in the boost mode.

If you are charging 6s packs, slightly lower the voltage on each supply to get total of about 23v. If you are using a Powerlab, the charge current log will clearly show if are still in the transition range.
Revolectrix Beta Team
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11-17-2014 04:59 AM  6 years ago
rcflyerheli

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Does it hurt anything?Logo 700, Specter 700, Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
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11-17-2014 10:36 PM  6 years ago
Gregor99

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Does it hurt anything?
All chargers do this. I know from discussions with the engineer the Powerlabs are designed to handle this without any issue.

But where it can become an issue is when running from a generator. The resulting pulsing can be heard as the generator struggling to cope with the changing load. In some cases this can cause unstable AC at the power supplies which may result in the supply struggling to deliver stable DC. The Powerlab monitors the stability of the DC source and will trigger a safety code if the supply voltage becomes too unstable to operate safety.
Revolectrix Beta Team
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11-17-2014 10:50 PM  6 years ago
rcflyerheli

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Thanks. How will this affect an inverter generator?Logo 700, Specter 700, Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
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11-17-2014 11:38 PM  6 years ago
Gregor99

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Its a pulsing load. Though the generator will sound awful, I'm not sure its actually doing any harm. But I don't know for certain. It may be depend on the quality of the generator.Revolectrix Beta Team
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11-18-2014 02:06 AM  6 years ago
rcflyerheli

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I have used my 2k inverter generator with my powerlab 8 and I don't recall hearing or seeing any pulsing on the generator.Logo 700, Specter 700, Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
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11-18-2014 04:30 AM  6 years ago
Gregor99

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Western Wa

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It doesn't do it every scenario. Charge rate and pack state of charge can change the ratio of input and output voltage.

For instance I had some supplies where it never happened until I bumped up my headspeed. The increased headspeed drained the pack a little more, which caused the starting voltage to just below the threshold.

When you increase the charge rate it can lower the loaded supply voltage. This can help keep the supply voltage low enough that its below the transition range. But lower the current and the supply voltage will increase slightly. Potentially putting it into the transition range.

If its not bothering you, don't worry about it. But if you hear the generator pulsing now you know a likely cause.
Revolectrix Beta Team
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11-18-2014 04:40 AM  6 years ago
rcflyerheli

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Thanks for the info. I'm pretty up on mechanical stuff, but this electrical theory is way outta my league.Logo 700, Specter 700, Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
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HomeRC & Power✈️Aircraft🚁Helicoptere-Electric Battery-Charger-pSupply › Powerlab 6 charging station
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