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Renewable Energy Discussion on various alternative energy, renewable energy, & free energy technologies. Also any discussion about the environment, global warming, and other related topics are welcome here.

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  #4441  
Old 01-01-2019, 04:07 PM
bistander bistander is online now
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Battery energy

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Originally Posted by Turion View Post
...
First, letís look at what weíve been taught. We put a volt meter on a battery to measure how much energy is contained in it. ...
Happy New year Turion,

Let's not start the year with a pizzing session, but I gotta say that you have been taught wrong. A voltmeter measures voltage or potential difference (same thing), NOT energy. Using a voltage measurement to attempt to determine the energy of a battery is very inaccurate. I see many here use voltage as an energy indicator and that leads them to erroneous conclusions.

Over the years, Battery University (in Germany) has had both good and dubious information posted at their web site. Back in 2012 I spent several days at a Lithium battery manufacturer next door to the Battery University. It was an impressive facility but inactive at that time so I was unable to visit them. But anyhow, today it appears they do have some good information available in lesson format. I'll link to one lesson, but please study other lessons on the subject of battery energy and state of charge measurements by using prior and next navigation arrows.

https://batteryuniversity.com/learn/...asure_capacity

Regards,

bi
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  #4442  
Old 01-01-2019, 04:29 PM
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citfta citfta is online now
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Happy New Year Bistander,

Dave was keeping the discussion simple for those that don't have advantaged knowledge about batteries. He and Matt and I all have battery analyzers to keep check on what our batteries are actually doing and the amount of charge they have. Those guys are the ones that encouraged me to get a battery analyzer for my own use so I could see what is really going on in the 3BGS and to help me learn how to balance and tune the system.

I drove an electric golf cart type of vehicle for several years at work. And I also had for several years an electric lawn mower called a GE Electrak. And guess what? Both of them had a simple volt meter that showed when it was time to recharge the batteries.

I understand what you mean about voltage not being a good indicator of how much energy is in a battery. A badly sulfated battery can have a high voltage reading but no real energy storage capacity. But for good batteries of reasonable size the voltage level is a pretty good indicator of the charge in the battery.

Carroll
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  #4443  
Old 01-01-2019, 05:05 PM
bistander bistander is online now
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Yep

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Originally Posted by citfta View Post
Happy New Year Bistander,

Dave was keeping the discussion simple for those that don't have advantaged knowledge about batteries. He and Matt and I all have battery analyzers to keep check on what our batteries are actually doing and the amount of charge they have. Those guys are the ones that encouraged me to get a battery analyzer for my own use so I could see what is really going on in the 3BGS and to help me learn how to balance and tune the system.

I drove an electric golf cart type of vehicle for several years at work. And I also had for several years an electric lawn mower called a GE Electrak. And guess what? Both of them had a simple volt meter that showed when it was time to recharge the batteries.

I understand what you mean about voltage not being a good indicator of how much energy is in a battery. A badly sulfated battery can have a high voltage reading but no real energy storage capacity. But for good batteries of reasonable size the voltage level is a pretty good indicator of the charge in the battery.

Carroll
Hi citfta,

Yep, one of the B.U. lessons does cover voltmeter SOC meters. They are crude and give a gross indication at best, but are useful on the likes of golf carts and better than nothing. What is very wrong is, as I have actually seen here, a member measures 12.65V compared to 12.64V and claims an increase in energy and "proof" of over unity. Performance claims of systems need to be validated with data from accurate instruments used correctly. Sticking a voltmeter across a battery for energy doesn't yield that. Turion should not perpetuate that method, IMO.

Regards,

bi
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  #4444  
Old 01-01-2019, 05:52 PM
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bi,
Once again you want to argue semantics instead of dealing with the CONCEPT I was attempting to explain. But this time you are agreeing with me and donít even realize it. Here is what I said:
Quote:
Originally Posted by Turion View Post
First, letís look at what weíve been taught. We put a volt meter on a battery to measure how much energy is contained in it....
What if the meter is actually measuring the (potential) DIFFERENCE between the positive and negative side of the battery.
You are so quick to try and jump on anything I say to try to discredit my posts that you miss the meaning. Or is that your purpose? To discredit any small part you can so that the whole will be ignored? What is it you think you gain by these tactics? Do you think I will quit? LOL.
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  #4445  
Old 01-01-2019, 06:25 PM
bistander bistander is online now
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Potential difference

Quote:
Originally Posted by Turion View Post
bi,
Once again you want to argue semantics instead of dealing with the CONCEPT I was attempting to explain. But this time you are agreeing with me and don’t even realize it. Here is what I said:

You are so quick to try and jump on anything I say to try to discredit my posts that you miss the meaning. Or is that your purpose? To discredit any small part you can so that the whole will be ignored? What is it you think you gain by these tactics? Do you think I will quit? LOL.
Turion,

I saw that. I read the entire post. There are other statements I disagree with but was going to keep it short and civil.

To start, you refer to measuring voltage to determine energy as common and correct, like saying "we've been taught". True, later you do say voltage is potential difference.

*Actually you said:
Quote:
Originally Posted by Turion View Post
...
What if the meter is actually measuring the (potential) DIFFERENCE between the positive and negative side of the battery. ...
"What if"... Like the voltmeter isn't reading potential difference.

My purpose was to give the readers a resource (Battery University website) to learn about batteries and proper measurements.

Citfta claims you have a good battery analyzer. I'd be interested in seeing what that is. I've mentioned before that I've tested thousands of batteries and the only really true, 100% accurate method of determining energy is Coulomb counting/voltage integration over time. These days there are fairly inexpensive watt hour meters available which do a pretty good job at this, like I used on my tests of your single battery dual converter system.

Regards,

bi
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Last edited by bistander; 01-01-2019 at 07:19 PM. Reason: Added quote and comment
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  #4446  
Old 01-01-2019, 08:04 PM
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Tools

bi,
Citfta, Matt and I all have the same battery analyzer and scope. Mine are over at my old house as I have not moved much of my shop over yet. Still remodeling the big empty room at the new place to turn it into a shop, along with about a thousand other projects, so I couldnít tell you the make and model of that battery analyzer. I do know Matt had access to a very expensive one for a time, and did a lot of testing with it also.

So far you have managed, once again, to keep the discussion focused on semantics rather than concepts. Good job.
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  #4447  
Old 01-01-2019, 08:21 PM
bistander bistander is online now
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Thanks

Quote:
Originally Posted by Turion View Post
...
So far you have managed, once again, to keep the discussion focused on semantics rather than concepts. Good job.
When one does not understand the terminology and details, good bet he doesn't know the correct concepts. I posted a resource where readers could learn the correct concepts as well as proper semantics. What's wrong with that?

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Originally Posted by Turion View Post
... Class dismissed
Regards,

bi
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  #4448  
Old 01-02-2019, 12:31 AM
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Lesson

Nothing would be wrong with that if you were trying to be helpful, but you are not. You know nothing about this stuff, have yet to even build a proper circuit to test it, yet assume your vast experience in other areas qualifies you to make judgements in this area. It doesnít. You continue to argue semantics because it is all you DO know. You havenít made a single cronstructive contribution to what we have shared and continue to insist it is our responsibility to spoon feed you everything because you are unwilling to invest the time and resources to discover anything on your own. If this is such a worthless project why are you here day after day claiming we are fakes and frauds? Why not just go on your way and invest your valuable time elsewhere? Probably because someone is paying you to discredit us and sidetrack this thread. That wonít happen though. Too many people have seen positive results, and that is just the tip of the iceberg.
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  #4449  
Old 01-02-2019, 02:32 AM
bistander bistander is online now
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Spoonfeed?

Quote:
Originally Posted by Turion View Post
Nothing would be wrong with that if you were trying to be helpful, but you are not. You know nothing about this stuff, have yet to even build a proper circuit to test it, yet assume your vast experience in other areas qualifies you to make judgements in this area. It doesnít. You continue to argue semantics because it is all you DO know. You havenít made a single cronstructive contribution to what we have shared and continue to insist it is our responsibility to spoon feed you everything because you are unwilling to invest the time and resources to discover anything on your own. If this is such a worthless project why are you here day after day claiming we are fakes and frauds? Why not just go on your way and invest your valuable time elsewhere? Probably because someone is paying you to discredit us and sidetrack this thread. That wonít happen though. Too many people have seen positive results, and that is just the tip of the iceberg.
Turion,

Asking for proof of claim is not insisting on being spoonfed. And why is posting facts, references to the science and asking reasonable questions not helpful? But instead of engaging me and discussing the concepts, you go on these rants. I have a great deal of experience in exactly the types of systems you're doing. You fail to recognize that and refuse the help I offer.

Why have none of these "positive results seen by too many people" been posted in a fashion where we can examine the methods and data? Show me one other who has built and documented your single battery dual converter system? I think I'm the only one. Isn't that helpful? Wasn't I helpful when another member asked about converters? Didn't I even help Matt understand better those converters?

Face it. You get hurt because the correct explanations and facts I post often contradict what you have posted. You could learn from that but instead you attack me. You should appreciate me.

And yes, bring your iceberg into port and show us more than the tip.

Regards,

bi
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  #4450  
Old 01-02-2019, 11:03 AM
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Matthew Jones Matthew Jones is offline
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Quote:
Originally Posted by axxelxavier View Post
You mention: „I have many Fet controlled 3 battery switchers that run from an arduino”. How did you managed to solve the common ground issue, for both voltage readings and for switching connections?

Best regards, and A HAPPY NEW YEAR!
Teodor
So the cheapest way to go is to localize every battery with the smallest Arduino you can get away with, which would be something like a ADA Trinket, or maybe just a little bigger, but something along that line.
It takes 6 fets per battery to be able to put the battery in any position in the system. You need 2 high side fets and 4 low side. You can do this simply with all the same parts for both low side and high side.
Now the little arduino's will interface to one big arduino central to the system and they will talk via SPI or I2c through a digital isolator. The Central Arduino will make the conclusions on what needs done based on the batteries current position and voltage.

The whole thing is a big undertaking. Expensive too, but its the only way your going to get everything under total automation.

You can also go the isolated ADC route if your real good with the arduino. The reason I would not use them is I don't believe there are Libraries that support it but there are plenty of libraries for TI adc's just not this isolated version. So you have to be able to write a library in C to run and interface that ADC.
https://www.digikey.com/product-deta...3-1-ND/7688273

The schematic of mine is in a notebook so I have to convert it. Make sure you are up to the task.

If you wanna try on your own you'll need:

To be able to interface between 2 Arduino independent of each other through a digital Isolator. You will find the needed info on the arduino forum.
You'll need to be able to read voltages from a battery with an ADC from the arduino.
I can give the switching pattern and parts. You have to build a board for each battery.

Basically what happens is each board can hook to 1 of 3 positions. The high rail, the low side rail or resting. Each board is powered locally by the battery its attached too, and again each battery has its own control system and measurement system, a master controller manages up to 16 batteries in the system and that can be expanded radically.


Let me know if your interested.

Matt
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Last edited by Matthew Jones; 01-02-2019 at 11:10 AM.
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  #4451  
Old 01-02-2019, 12:55 PM
axxelxavier axxelxavier is offline
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Quote:
Originally Posted by Matthew Jones View Post
So the cheapest way to go is to localize every battery with the smallest Arduino you can get away with
I already have some Arduino Nano's laying around, and I'm going to try with those first.
Quote:
Originally Posted by Matthew Jones View Post
It takes 6 fets per battery to be able to put the battery in any position in the system. You need 2 high side fets and 4 low side. You can do this simply with all the same parts for both low side and high side.
Do you have a schematic on this? I would like to try to use mosfets, instead of relays...

Quote:
Originally Posted by Matthew Jones View Post
The whole thing is a big undertaking. Expensive too, but its the only way your going to get everything under total automation.
I already spended big bucks on my trials, not to mention all boards who end up in „magic smoke”. That's the price of knowledge, I suppose...
Quote:
Originally Posted by Matthew Jones View Post
The schematic of mine is in a notebook so I have to convert it. Make sure you are up to the task.
If you wanna try on your own you'll need:
To be able to interface between 2 Arduino independent of each other through a digital Isolator. You will find the needed info on the arduino forum.
You'll need to be able to read voltages from a battery with an ADC from the arduino.
I can give the switching pattern and parts. You have to build a board for each battery.
Basically what happens is each board can hook to 1 of 3 positions. The high rail, the low side rail or resting. Each board is powered locally by the battery its attached too, and again each battery has its own control system and measurement system, a master controller manages up to 16 batteries in the system and that can be expanded radically.
Let me know if your interested.
Matt
For sure, I am VERY interested. At the beginning, I had the same idea as yours, to make local boards for controlling each battery, but my lack of information about electronics - to be more specific, about how to control those local Arduino's with a central one, make me stop.
My dream is to make an autonomous switching system, powered by each battery itself, with a small current draw.
There are techniques for low power consumption in Arduino which I already tested, and I intend to combine this with low power current draw switching of n-mosfets.
In the meantime, I will learn about arduino's i2c communication and digital isolators.
Best regards,
Teodor
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  #4452  
Old 01-03-2019, 09:09 AM
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Matthew Jones Matthew Jones is offline
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Alright give me a couple of days.

Matt
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  #4453  
Old 01-03-2019, 03:51 PM
axxelxavier axxelxavier is offline
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Alright give me a couple of days.
Matt
Ok, I will wait patiently.
I the meantime, I've been played with 3BGS with small 7 Amp Alum batts, load hooked to a booster (set to 36 volts), and then differential voltage (20 volt) to a REMF charger, charging the fourth battery. The results was somehow disappointing, which is normal, I think. The charge in third battery was inconsistent, not like the charge done before with the modified motor. This test failed big time, but I was aware of failure possibility.
Now I'm testing 3BGS using an inverter, wich give me some usable light at 800 mA current draw (inverter + 5 Watt led lamp). First cycle was very promising, BUT, I have to say now I'm using 40 Amp deep cycle batteries, and, it seems like resting time helps a lot charging the third batt.
Right now I'm running the second cycle, and the result looks, also, promising. Battery charged first time looks stable, and the charging process of the third battery seems to be effective.
After finishing all the cycles of the test, I will post results with diagrams.
By the way, light in the room is powered by inverter :-)


L.E. I updated this post with some Excel charts.

Short conclusions: main goal was achieved - third battery is charging for real with inverter.

Note 1: batteries was discharged only to 12 volt, though specs allow to be discharged down to 10,5 volt (FCD12-40AT batteries).
Note 2. all three batteries was not fully charged.
I manage to run batteries in 3BGS configuration for 35 hours, at 800 mA load, but this does not prove anything special, so far.
Anyway, in next test I'm just discharging the battery with inverter and led lamp, to see how long the load will last in real world.
I'm going to make a complete test using 3BGS configuration with fully charged batteries, down to 11 volts, only when my automatic switcher will be ready.

Best regards,
Teodor
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File Type: jpg Charge Batt2_Page_2.jpg (117.3 KB, 16 views)
File Type: jpg Charge Batt2_Page_3.jpg (115.2 KB, 13 views)
File Type: jpg Charge Batt2_Page_4.jpg (128.4 KB, 13 views)
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Last edited by axxelxavier; 01-05-2019 at 04:53 PM. Reason: No need to create another post...
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  #4454  
Old 01-13-2019, 05:10 AM
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Update

You guys should know that Matt has had some technical difficulties, which required a whole new operating system installed from scratch on his computer. And since it is now a Linux machine and he NEEDS to be able to run some specific kinds of programs, he now has to figure out how to run similar programs in Linux. So he is swamped with trying to get all this figured out just so he can climb back up to the baseline he was on before everything went to crap. He may not be responding for a while.

On another note. If you haven't built a MODIFIED MATT MOTOR and begun to learn how these systems work and WHY we believe they are so important, you really need to do that. One day you will be kicking yourself that you wouldn't pay attention when you had the chance. That day is fast approaching.
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Last edited by Turion; 01-13-2019 at 05:52 AM.
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  #4455  
Old 01-13-2019, 04:43 PM
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First New Year post

My first post of new year.

Sorry to hear about the meltdown Matt. Sure you'll be back real soon. My son-in-law wanted to switch me over to Linux but decided not to as I'm not the IT type. Plus my relentless calls would have made him crazy. LOL.

My modified Matt motor days are passed as I hope to move on to better days in the shop.

Will see what this year brings.

wantomake
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  #4456  
Old 01-14-2019, 01:48 AM
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I finished winding another motor the other night, havenít compared running it yet to the before numbers, it does seem to run smoothly. I still have to check rpms and amps and temp.
I have been building the benitez switching as Peter demonstrated, hoping to have that finished soon, just don't get a lot of time in the shop.
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  #4457  
Old 01-14-2019, 02:15 PM
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I do IT. Working for a MIL contractor, I became a "real boy" started using PUIAS(Princeton LINUX - because it was closest to RHEL). I was able to do everything that I use to do in Windows, because I ran Windows 7 VBOX as a sub host. LINUX was just the protected wrapper, I could snapshot the WIN VM so If I felt any intrusion or anomaly I could roll back. The trick is to separate your data, and have network backups, while knowing what had to live where to function. Once you did that, you had a more powerful operating system without the direct access to kernel worries and praying zero day vulnerability would make you toast. ---jmtc
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  #4458  
Old 01-14-2019, 02:30 PM
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Looks good

Quote:
Originally Posted by Sawt2 View Post
I finished winding another motor the other night, havenít compared running it yet to the before numbers, it does seem to run smoothly. I still have to check rpms and amps and temp.
I have been building the benitez switching as Peter demonstrated, hoping to have that finished soon, just don't get a lot of time in the shop.
Sawt2,
Nice winding there. Just noticed you used single wire instead of bifilar winding. Don't know what difference it makes. I copied Matt's motor modification to exact as possible to get same results. He helped me very much answering my questions.

Not being negative in any way. Just my two cents of observation. Interesting to see your results.

wantomake
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  #4459  
Old 01-14-2019, 05:11 PM
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Sawt2,
Nice winding there. Just noticed you used single wire instead of bifilar winding. Don't know what difference it makes. I copied Matt's motor modification to exact as possible to get same results. He helped me very much answering my questions.

Not being negative in any way. Just my two cents of observation. Interesting to see your results.

wantomake
I didnít realize he did bifilar.
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  #4460  
Old 01-15-2019, 05:32 AM
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Info

I did a little test today on two of my 12 volt batteries. Wired them in series and ran an 80 watt load for 3 hours and 10 minutes until battery voltage dropped to 12.5 volts. Don’t want to go lower than that. I also put the battery analyzer on them when they were fully charged and again when I was done.

Gonna run the same 80 watt load using the principles we have been sharing and see how long it lasts. Will run the battery analyzer tests on it also. Just for fun. Who knows HOW it will turn out. It all begins with understanding the principles, and THAT begins when you have a working circuit. Which requires a working modified Matt motor. Harp, harp, harp. That’s all I do.
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  #4461  
Old 01-15-2019, 09:35 AM
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lifetime of carbon brushes

Hi Turion,
According to your experience, to how many hours do you estimate the life of carbon brushes of the modified motor Mat MY?
Personally, I experimented with a ZY1016. When I bought it, I did not know that its collector had 20 poles instead of 16 as on the MY.
For good results, I found the solution that consisted in reducing a little the thickness of the carbon brushes, but the two that receive the collapse of the coils are now completely worn, after a hundred hours of operation only.
The other two carbon brushes are still good.

cordially
m12
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  #4462  
Old 01-15-2019, 03:53 PM
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Brushes

M12,
Unfortunately, that is a question I cannot answer. I never had a brush problem with the MY1016 when I was using them. But I never ran one that long either. I usually burnt them up. I soon moved to the MY1020 which is a bigger motor. No problem there either.

The My1016 stock or modified could not break the magnetic lock to start my generator and I burnt up lots of them. The MY1020 could start it about three times before it was also toast.

Once I solved the magnetic lock problem I put out enough energy that I didn’t NEED a modified motor and not having to wind them all the time was a great relief!! So I haven’t used a modified motor in quite some time. Just a stock motor with a 555 timer to get me the pulse I need. I can afford to waste energy in my circuits now because of what I get out of the generator.

On a small setup you just CAN’T afford to waste anything.
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  #4463  
Old 01-15-2019, 05:48 PM
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Battery analyzer

This is the battery analyzer I have been using. It is by no means an expensive one.
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Old 01-15-2019, 07:29 PM
axxelxavier axxelxavier is offline
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I did a little test today on two of my 12 volt batteries. Wired them in series and ran an 80 watt load for 3 hours and 10 minutes until battery voltage dropped to 12.5 volts. Donít want to go lower than that.
Can you be more specific, please? What is the capacity of each battery?
If the load was 3 Amp, and each battery was drained to only 12,5 volt in 3 hours, I think they are at least 200 Amp/hour...
Best regards,
Teodor
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Old 01-16-2019, 05:27 AM
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Turion Turion is offline
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Batteries

These are the little lawn and garden batteries I am using for this experimenting. Generally I use them when testing a circuit so I don’t RUIN my good batteries. I have 10 of them, 2 that are Alum, and ten 6 volt deep cycle golf cart batteries.

When I get done running several charge and recharge cycles to get solid baseline data I can post all the info on the batteries and what my little Harbor Freight analyzer had to say about them. Matt has a tiny bit better battery analyzer that I’m pretty sure cost him about $3,000.00. So when he says he has analyzed a battery and knows what is going on with it, I would listen to him. (I actually thought it cost more than that, but he told me today it was $3,000.00)

I’m just testing to see how long I can run the 80 watts directly off two batteries. Then I can compare to running it on a circuit. Not sharing those results here though. We’ve given away as much as we’re prepared to and only a few are building or experimenting anyway. I will just pop in to encourage people to build the circuits we have ALREADY shown with the correct parts. They prove this is for real. Then you are on your own to experiment and take it to the next level. We just want you to know it works and there REALLY IS a “next level.”
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Last edited by Turion; 01-16-2019 at 02:53 PM.
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  #4466  
Old 01-18-2019, 07:29 PM
axxelxavier axxelxavier is offline
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Quote:
Originally Posted by Turion View Post
These are the little lawn and garden batteries I am using for this experimenting... We just want you to know it works and there REALLY IS a “next level.”
Thank you for your reply. I've finished my first test, discharging normally my batt down to 10,5 volt, and the results are:
- run time 26 hours 36 min, at 0,8 Amp load (one led bulb) and 14 hours 33 min, at 1,42 Amp load (two led bulbs)
I consider irrelevant, however, my first results. The test with one led lamp was wayyyy to long, so i tried to add a second light, to see what happens.
I am now discharging again my battery, but this time at 2,07 Amp, to fit C20 rate, and this time I will go down to only 11 volts. Because in this test I am using 3 led bulbs as my main light in dining room, during the night, it will take some time to complete the test. So far are 11 hours already gone, and I think it will last only 14-15 hours.
So my hope is that 3BGS would last for more than 30 hours, in inverter configuration with 2 batteries fully charged, and the third discharged to 11 volts.
I will repeat later test with modified motor, but the noise is a big problem in my small place, I don't think my wife and kids will be happy... I have to find a way to cancel or to attenuate the noise...

L.E. OK, so here are the results of second test:
40 Amp Deep Cycle Battery, discharged normally at 2,07 Amp/h down to 11,00 volt - RUN TIME: 18 Hours, 39 MIN, REST TIME: 32 Hours, 19 min Battery was used for lighting one room during night, with 3 led bulbs hooked to an inverter, so this is why it takes 4 days. In attachment, you have all the data.
It is time to start tests in 3BGS configuration + inverter, with 2 Batteries fully charged, and this depleted batt. I hope in this configuration it would last for more than 36 hours...
I'll be back with more results.

Best regards,
Teodor
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Last edited by axxelxavier; 01-19-2019 at 10:16 PM. Reason: Adding Data
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  #4467  
Old 01-21-2019, 09:36 AM
Iamnuts Iamnuts is online now
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Amazing!

Just amazed by the numbers.

ABB has just booked the first thyristor orders for a 10-gigawatt HVDC line in China Ė that is, 10,000,000,000 watts of power in a single installation, with a conversion efficiency beyond 99.6%. This is substantially more than the total energy consumption of Switzerland. Each device has the capacity to conduct 6,250 amperes, and will have blocking capability of 7,200 volts. Under normal operating conditions, a single component will switch more than 20 MW of power.
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Old 01-23-2019, 10:07 PM
Iamnuts Iamnuts is online now
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Revolution Green.

Interesting advance.

Called HyMag, the invention can benefit virtually any technology that draws power from electric motors or generates power from generators. The former includes battery-powered equipment and devices, such as power tools, wheelchairs, golf carts and electric and hybrid vehicles. The latter includes standby power for business and offshore wind turbines.
When designed properly, the gain in the magnetís usable flux density ranges from 10 to 30 percent, depending on the application and working temperatures, said HyMagís inventors, Argonneís Kaizhong Gao and Yuepeng Zhang.
ďThis additional efficiency will translate into either more energy produced or you will have less loss,Ē said Gao, group leader of Nanomaterials, Devices, and Systems at Argonne.
HyMag could especially benefit a weight-sensitive application, such as wind turbines, because the technologyís higher efficiency could lead to downsized structures. Stronger magnets would, for example, make it possible to reduce the amount of weight-bearing and support materials of the outer casings that sit atop direct-drive wind turbines. The outer casings account for more than half the weight of a 100Ė to 130-ton wind tower. Smaller casings could be designed into taller towers, allowing the turbines to access stronger winds.
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Old 01-23-2019, 11:11 PM
Iamnuts Iamnuts is online now
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Tesla motor.

Efficiency.

One of those things has to do with the motor design. According to Munro, the Model 3ís motivator takes advantage of Halbach arrays, which produces a stronger-than-normal field on one side of the magnet while reducing the other side to near zero. Itís pretty technical, but the final result is, compared with motors in competitors such as the Chevy Bolt and BMW i3 (vehicles Munro has also completed teardowns of), the unit is smaller, lighter, more powerful, and more efficient. To boot, itís also cheaper.
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Old 01-23-2019, 11:27 PM
Iamnuts Iamnuts is online now
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Honda.

Iíve just been looking at a cut-away pic of a Honda hybrid motor.
It looks to me as if they are using oblong section wire for the windings.
I presume this is to produce a really compact winding which would give
a more concentrated field and an overall smaller motor.
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