Outta Control Posted at 2015-4-4 00:11
Bob thoughts on this?

http://www.ebay.com/itm/DJI-Inspire-1-Custom-Multi-Battery-Charger-Combo-with ...

That looks nice, but pricey.
Also, I plan on having all 4 of my packs inline, (not staggered) so the unit will snug up to the wall on my work bench).
Definitely something to consider if you're not comfortable making your own.

rodger Posted at 2015-4-4 02:42
Thanks Jon, very interesting. 18 Gauge wire is rated for 5 Amps for a distance of 10 feet. 40 Amps requires an 8 Gauge Conductor for 10 feet  ...

When was the last time you had 10 feet of wire between your battery and ESC? - just plain dumb

I have run HUNDREDS of bench and field tests using a watt meter (and recording MANY of them). I know EXACTLY what I'm talking about, (and you guys are just looking for a fight) - (I'm not playing, sorry)

You guys are tools and I won't comment again about your silliness.

I'M GOING TO SAY THIS AGAIN BECAUSE SOME GUYS ARE NOT GETTING IT -

"Power Supplies DO NOT push/or force power to anything. They just sit there, and offer any power asked of them, (up to their rating). Having a giant Power Supply will NOT blow up a lipo pack. It will simply only supply the amount of power the Charger is asking of it.
Having an adequate Power Supply is the most important component in the charging system. "Scottie, we need more power"


Let me put this another way, and I'll use a word that has a double meaning for your guys.
A Power Supply "should" be like a big lake/reservoir.  
You should be able to fill up your canteen, or a 5 gallon bucket, or a 55g fish tank, or a large back yard swimming pool.
You don't have to take a 5 gallon bucket if all you need is a canteen's worth. No one is going to force it on you, it's just there if you need it. Choose a power supply that is adequate for your needs/has plenty for the job you intend to do.
You do not need a big lake if you're not going to be filling large swimming pools, (but it would be nice to have a 5g bucket if you were just filling canteens. In DJI's case, it's like trying to fill a 5 gallon bucket from a puddle. There is just barely enough to do it, so the little power supply gets very hot as it struggles to fill the lipo pack, (the "supply" is exhausted") -

dmascheck Posted at 2015-4-4 03:00
What power supply are you buying and what are the specs?

Thank you in advance!

THIS is the Power Supply I have on order.

And to the rest of you actually GETTING something out of this, Thanks for the kind words. I will focus on you guys (instead of the thread crappers) -

daver/m Posted at 2015-4-4 00:29
Going to cut my chargers cord and splice it for my multi charger used with some other flight batterys , easier to monitor the charge this way. Truth meter !
Very good then hope you enjoy your bird !  ...

No, Don't !!!!

You CANNOT use a Charger of any kind in place of a Power Supply.

Also, you keep mixing the two words up, so I'm NOT exactly sure what you are talking about.

The tb47 & tb48 already have a "charging" board soldered to 6s pack. (you cannot change this fact)-

We do NOT know how many watts the charger on the lipos want.
Once I have a discharged lipo pack, and a Power source of 300w or so, I will hook up the pack and the watt meter will tell us EXACTLY how many watts the charger would like to have to charge the pack.
It may only want 140w and there is nothing more we can do about it, we cannot adjust the rate of charge, we can only make sure we have a Power supply big enough to give our chargers what they are asking for,
(without getting HOT).

I hope that makes sense -

Bob

Bob Marley Posted at 2015-4-4 06:31
THIS is the Power Supply I have on order.

That's a very pretty charger Bob but what are you going to use it for?
You need 25.2 volts to take 6s pack to terminal charge voltage. At 24 volts you will never fully charge the pack.

markjacobs.talk Posted at 2015-4-4 07:03
That's a very pretty charger Bob but what are you going to use it for?
You need 25.2 volts to take ...

Output voltage adjust range: ±10%

markjacobs.talk Posted at 2015-4-4 07:03
That's a very pretty charger Bob but what are you going to use it for?
You need 25.2 volts to take ...

It's NOT a charger Mark, it's a Power Supply, (and the voltage is adjustable)
Go back to your simulator please, I'll quote you when I have more data for you to not understand -

Great info.
From my understanding of this - this should be good for supplying two Inspire 1 batteries  ? :

http://www.circuitspecialists.eu ... y-24v-13a-320w-psu/

nilsblix@gmail. Posted at 2015-4-4 07:41
Great info.
From my understanding of this - this should be good for supplying two Inspire 1 batteries  ? :

http://www.circuitspecialists.eu ... y-24v-13a-320w-psu/ ...

Yes, you have a clear understanding of what is going on and that supply would work great.

Bob Marley Posted at 2015-4-4 06:01
When was the last time you had 10 feet of wire between your battery and ESC? - just plain dumb

I  ...

If you could read. I said that the current draw was based on a 10 foot conductor! Want to base it on a 20 foot conductor! We can go there as well! Obviously you do not know what you are talking about. Please do not bother me with your BS and go have another Martini

Bob Marley Posted at 2015-4-4 06:01
When was the last time you had 10 feet of wire between your battery and ESC? - just plain dumb

I  ...

Hey Bob, Watt Meter is to measure the output of a transmitter. Current is measured in series with the meter connected to measure the current. You do not know what you are talking about! Others on the Forum have picked up on your Post, making you an electronics expert. You are a legend in your own mind'! Not ours! My last Post on this thread, check your Meds!

Bob Marley Posted at 2015-4-4 06:31
THIS is the Power Supply I have on order.

Thank you I've been looking for such a power supply.

Outta Control Posted at 2015-4-4 08:42
Thank you I've been looking for such a power supply.

I spent a lot of time researching Power Supplies and will be happy to share my design with you when it's ready -

rodger Posted at 2015-4-4 02:42
Thanks Jon, very interesting. I never would have thought that. I looked it up in the Code  and the  ...

Sometimes the insulation used on the conductor will provide a higher current rating. I believe silicone insulation is used widely in electric RC gear.

Other things to consider is stranded wire offers lower voltage stress between strands and is more flexible. Twisted strands offer lower induction current (strays) less electrical noise if it used onboard the aircraft.

Bob Marley Posted at 2015-4-4 08:44
I spent a lot of time researching Power Supplies and will be happy to share my design with you whe ...

Please do and I appreciate it.

Bob Marley Posted at 2015-4-4 05:54
My power supply is getting HOT ... 1) - But I am expecting it to get hot as it is for 100 watts an ...

Bob,

This is the 1200 watt power supply I use for my other RC gear. Check this link below. It is a very nice bench model design. I have had great luck with this one and it has lots of head room.
http://www.amain.com/rc-helicopt ... 0w-ptk-8515/p260581

RichJ53 Posted at 2015-4-4 09:05
Bob,

This is the 1200 watt power supply I use for my other RC gear. Check this link below. It is  ...

OK, "power supply" not "charger".

That is one kick ass power supply Rich, (I am jealous).
It is pricey, but the head room is awesome, very nice.

Hook that bad boy up right now, I'm dying to see how many watts these smart batteries would like.

Cut that little dji power supply cord and solder on some connectors man, now I'm excited!

Bob Marley Posted at 2015-4-4 09:22
OK, "power supply" not "charger".

That is one kick ass power supply Rich, (I am jealous).

Thanks, it took awhile to save up for this power supply for sure.
I am tempted to try it but chicken too. You can adjust the voltage but not the current.. So it will pump out what ever the battery can take. I use the Thunder Power RC TP820CD 800 Watt Dual Port Multi-Chemistry DC Charger/Discharger/Cycler with Balancing System that gives me the ability to adjust the rest of the parameters.

This is not a great photo, but this is what I use for charging everything else.

Firstly, bob is on the right track but his facts are a little off. The first is while these power supplies barely meet the requirements for the job , they are not laptop power supplies ,unless of course your laptop operates on a 24 volt system, Second, a power supply capable of delivering 24 volts DC at 40 amps will light that wire up like a light bulb element and smoke will be everywhere that's  880 watts DC man!
And finally the input circuit on the board in the charger will have a protection circuit to protect from overload and a resistance circuit to restrict the amount of current . Simply supplying more available amps will not charge the batteries any faster than the overload protection circuit will allow. The only advantage you will gain will be more efficient transfer of electrons as less will be lost in the form of heat. And that's the truth.

RichJ53 Posted at 2015-4-4 12:04
I am tempted to try it but chicken too. You can adjust the voltage but not the current.. So it will pump out what ever the battery can take.

You are looking at it incorrectly Rich.
I am not sure why it's so hard for people to grasp, (not just you) but your power supply does NOT "pump out" anything. It is just sitting there, and when you hook it up to your charger, it will just sit there and not do anything, and certainly will NOT pump out any power. It will just sit there and do nothing until the Charger steals/takes whatever it wants.

I will say it again, this time with an even BETTER example.
There is no "pumping out" with Power supplies. When you connect the power supply to a charger and turn it on, it does NOT shoot 1200 watts into your Charger, (or into your battery).
It does nothing but just sit there, like a full glass of chocolate milk.
When you put a straw into the glass, chocolate milk does not pump out the top end. You have to suck on the straw and take what you want. The Charger does the same exact thing, it sucks what it wants from the power supply, the power in the supply is never forced out into something.

Bob

But yes he is right any power supply capable of delivering 24 volts regulated power at not less than 4 amps should run cooler, more amps does not always mean more efficient though as the transformers in large power supplies also create heat just being turned on. Also, a suitable power supply can be had through amateur radio stores or online at radio world for 500 - 800 dollars plus or minus. So DJI chose the small supplies because they were compact enough to be transported. Larger power supplies are big and heavy and pricey.. No sense shipping a 10 amp 24 volt power supply for one battery?  While these are marginal supplies they do work, kinda. I will be using my large ham radio power supply capable of producing 1000 watts DC continuos power at 12 volts into deep cycle batteries intended for whistle bouys for the coast guard, each battery weighs about 80 lbs and they are all 2 volt each naturally I have 12 of them and I can operate my radio station for weeks with no AC.

Incredible.

Interested to see how you get on with that power supply when it arrives Bob, will any good quality 6s Lipo charger work.. Charging the batteries in balance model

Also Bob rather than cut my DJI charging cable have you come accross the plug that DJI have used connecting to the battery so we could just make up our own wire?

Keep up the great work Bob this is very interesting

I am sorry Bob - you have information and knowledge that is valuable for us - and it is possible ( at least for me ) to ignore your way of communicating. I have been working with people with similar disabilities of social skills that you have. I know my words won't reach you - that is part of your social shortcoming - but I write this for others that are insulted from some of your answers. Bob can not help it - in his mind he is totally right in all way - and everybody meaning different than him is plain dumb. BUT if we just could ignore his shortcoming - he has knowledge and a willingness to share this knowledge with us - thus he is a valuable contributer to this community.

nilsblix@gmail. Posted at 2015-4-4 15:23
I am sorry Bob - you have information and knowledge that is valuable for us - and it is possible ( a ...

So ... Basically you are saying that Bob is slightly "aspie" ...

Well ... So am I ... And it's much easier to understand where Bob is coming from in all this as he is the only one making complete sence about his facts based on the "power supply / charger / lipo" constillation ...

I feel for you Bob ... And my guess is that you often feel like the "expert" in this you tube video ...

http://youtu.be/BKorP55Aqvg

Bob Marley Posted at 2015-4-3 21:16
Yes I am SURE, and clearly you are NOT.
Jon, PLEASE don't eff up this thread !!!

Your not as laid back as your name-sake

Ok I do not want to eff Bobs thread up but the idea of a forum is to share information and opinions. Here goes.
In rich's charging set up for other lipo's there are 3 parts to the system. There is the power supply, the charger and then at the end, the lipo battery to be charged.
The lipo battery will take a lot of current and the higher the current, the more quickly it will charge.....up to a limit!!!!
If the power supply is large then it will supply enough current for this to happen.
The charger in the middle controls all of the power and charges the battery to its maximum of usually 4.2 V per cell at a current selected by the user. It senses when the battery is fully charged and switches off. If it didn't switch off, the battery would be ruined and probably catch fire. As it charges it also balances the cells in the battery pack so that they are all the same.

The Inspire system is different. Yes the black box with wires is a power supply and not a charger. However it works in conjunction with the electronics within the battery to provide a controlled current to the lipo cells at the correct voltage.
It has a maximum current output of 4.2 Amps according to Bobs "truth meter" and the circuitry within the battery can handle this. It is part of the charger because of this. The power supply and the electronics together are the charger!
If you attach a bigger power supply to the Inspire battery with a view to charging the battery quicker, then you have altered a critical part of the Inspire charging system. Yes the power supply will be fine and will supply more current, yes the lipo cells will be fine and they will take the extra current. The poor fella in the middle ie. the intelligent system on the battery which is contolling the charge will not be fine!!! It has been designed to operate in conjunction with the supplied power supply.
If you want to strip the battery down and bypass the intelligent circuitry and use a balance charger with the lipo cells themselves then this would work. To do this you will need a charger similar to Rich's.

This is my own opinion, however it has been backed up by two very reputable RC supply stores in the UK who sell the Inspire. When asked if I bought one of their high end power supplies will it be ok to charge my inspire batteries the answer was "no do not try it".
If it had been possible then the stores would have taken my money and sold me a power supply!!!!

If you can get a bigger power supply that you can restrict the output to that of the supplied Inspire power supply then it will run cooler but there is no point because if you are concerned about the heat of the standard one just get a small fan and cool it whilst charging.

Unfortunately Bob has stated that he is leaving the forum so he will not be able to give us the results after testing his new power supply.

Guys please do not do what Bob has suggested and attach a bigger power supply directly to your Inspire batteries via the Inspire connector without taking expert professional advice.  

   
   
      

Dave E Posted at 2015-4-4 17:46
Ok I do not want to eff Bobs thread up but the idea of a forum is to share information and opinions. ...

OK ... This is getting confusing !

I would rather have the DJI engineer tellings us "the truth" but if they risk selling alot less power suplies / "chargers" they will probably not give "the win" to Bob ...

I hate this world!

Bob thank you very much for your research. It is vey easy and detail.

Did you have the most important answer yet - how much watts this dji smart battery will want?

My dealer said that Dji is coming out with a more powerful power supply very very soon.

WOW! This has been one...

My advice

Dont F##K with the...
Bob Marley :@

Seriously though Bob...I agree the Inspire chargers should'nt get so darn hot that one cant even hold it!
Great post by you Bob well done

bahamasky@me.co Posted at 2015-4-4 19:49
My dealer said that Dji is coming out with a more powerful power supply very very soon.

Interesting ...

That means that what Dave E (based on what his dealer said) "thought" isn't correct !?

Smileys just isn't enough any more ... I need sound effects !!!

Lets face it ...

Most people in this world don't have a clue of what they are doing or why they do it ...
The world needs people like Bob!!!

http://youtu.be/EHAuGA7gqFU

w1der Posted at 2015-4-4 20:47
Lets face it ...

Most people in this world don't have a clue of what they are doing or why they do ...

Assuming he's right.

And I still seriously doubt the 40 Amps through that bell wire thing being 'right'..

The inspire power supply does run hot. maybe not perfect. but I've already charged my 5 batteries dozens of times with my 3 chargers, often charging the RC simultaneously without any big issues, so can't really see why everyone is getting so charged over this (excuse the pun), it doesn't matter a rats arse.
But Bob, you're a rude man, with zero social skils. It doesn't matter how smart you think you are, it's not necessary.

I was just informed of the new power supply on Wednesday of this week. He said as soon as the arrive he will send me an email. So it's concrete.

Bob
Keep up the good work I find it very useful and interesting...
Some of us actually appretiate your work and findings its really too bad that there are so many ignorant and stupid people on this forum.
If those don't like what you read then don't read the post its as simple as that..

Visual Air Posted at 2015-4-4 22:26
Bob
Keep up the good work I find it very useful and interesting...
Some of us actually appretiate yo ...

REALLY!! Come on dude, why would you want to incite chaos? "so many stupid and ignorant people on this forum", that's absolutely unnecessary. I find Bob's posts interesting and educational, but there are many intelligent people on here. No need to be insulting. I am not nearly as smart as most of the guys on here, that's why I read, so I can learn.