Language: 
To browser these website, it's necessary to store cookies on your computer.
The cookies contain no personal information, they are required for program control.
  the storage of cookies while browsing this website, on Login and Register.

GDPR and DSGVO law

Storing Cookies (See : http://ec.europa.eu/ipg/basics/legal/cookies/index_en.htm ) help us to bring you our services at overunity.com . If you use this website and our services you declare yourself okay with using cookies .More Infos here:
https://overunity.com/5553/privacy-policy/
If you do not agree with storing cookies, please LEAVE this website now. From the 25th of May 2018, every existing user has to accept the GDPR agreement at first login. If a user is unwilling to accept the GDPR, he should email us and request to erase his account. Many thanks for your understanding.
Amazon Warehouse Deals ! Now even more Deep Discounts ! Check out these great prices on slightly used or just opened once only items.I always buy my gadgets via these great Warehouse deals ! Highly recommended ! Many thanks for supporting OverUnity.com this way.

User Menu

A-Ads

Powerbox

Smartbox

3D Solar

3D Solar Panels

DC2DC converter

Micro JouleThief

FireMatch

FireMatch

CCKnife

CCKnife

CCTool

CCTool

Magpi Magazine

Magpi Magazine Free Rasberry Pi Magazine

Battery Recondition

Battery Recondition

Arduino

Ultracaps

YT Subscribe

Gravity Machines

Tesla-Ebook

Magnet Secrets

Lindemann Video

Navigation

Products

Products

WaterMotor kit

Statistics

  • *Total Members: 83480
  • *Latest: Qimoya

  • *Total Posts: 513424
  • *Total Topics: 15279
  • *Online Today: 44
  • *Most Online: 103
(December 19, 2006, 11:27:19 PM)
  • *Users: 4
  • *Guests: 11
  • *Total: 15

Author Topic: 47000 Watt Magnetizer  (Read 14493 times)

Offline citfta

  • Hero Member
  • *****
  • Posts: 784
Re: 47000 Watt Magnetizer
« Reply #30 on: November 29, 2015, 01:28:19 PM »
Hi Brad,

Your wire is too small.  According to the ampacity charts that size wire is only good for a maximum of 302 amps.  If I understand your system you are trying to get 1000 amps through that wire.  You are going to have to parallel some of those wires together to reduce the voltage drop.

I don't have time right now to do the research but I think 35 ms is too short of an on time to magnetize something.  Just roughly I remember our magnetizers at work taking at least a second to magnetize something and several seconds to demagnetize an object.  I'll try to look up some info on that later in the day unless someone else gets it first.

Carroll

Free Energy | searching for free energy and discussing free energy

Re: 47000 Watt Magnetizer
« Reply #30 on: November 29, 2015, 01:28:19 PM »

Offline tinman

  • Hero Member
  • *****
  • Posts: 5240
Re: 47000 Watt Magnetizer
« Reply #31 on: November 29, 2015, 01:40:58 PM »
Hi Brad,

Your wire is too small.  According to the ampacity charts that size wire is only good for a maximum of 302 amps.  If I understand your system you are trying to get 1000 amps through that wire.  You are going to have to parallel some of those wires together to reduce the voltage drop.

I don't have time right now to do the research but I think 35 ms is too short of an on time to magnetize something.  Just roughly I remember our magnetizers at work taking at least a second to magnetize something and several seconds to demagnetize an object.  I'll try to look up some info on that later in the day unless someone else gets it first.

Carroll

Hi Carroll

No,the wire is not to small,as it is 12mm in diameter,not 12mm square area.The cable i am using is from the machine that had this battery bank in it,and as we heard from PW not so long ago,it dosnt take to much to gain instantaneous current,which is a lot different to that of continuous current.


Brad

Offline tinman

  • Hero Member
  • *****
  • Posts: 5240
Re: 47000 Watt Magnetizer
« Reply #32 on: November 29, 2015, 01:53:49 PM »
Hi Brad,

Yes, I also think the erratic start of the pulse can be caused by the arching across the solenoid contacts, looks like flyback pulses due to current interruptions.  You have surely checked and improved the contacts since then?
The voltage drop may still be caused by resistive loss as was the case initially for Luc's setup, when dealing with peak currents of several Ampers or some tens of Ampers , every milliOhm counts.

I think it would still be worth checking the voltage drop across the battery by your oscilloscope during the ON time, due to the 24 cells in series,  the inner resistances add up.
Just considering say 0.01 Ohm for a single cell,  24*0.01=0.24 Ohm and when you have a 10 Amper peak current at the switch-on moment, the drop is 2.4V. You seem to have a 23-24V drop from the start battery voltage...  as if you had a 100 Amper peak current at switch-on? (assuming the total 0.24 Ohm resistance in the circuit). I do not know the resitance of the solenoid.   
A quick test: connect a high uF capacitor across the battery bank and see whether the drop reduces.

Gyula

Hi Gyula

Yes-i believe the relay is letting me down here,and that clearly looks like arcing at the start of the power pulse. Voltage up to the relay remains at 49 volts when the relay switches on,but at the coil you can see a clear drop. The resistance of the coil i cant measure,as it only go's to the second decimal. So it seems that the relay is the cause of the current drop. The resistance across these batteries would be extremely low as they have a very large plate area. But how to switch a current load this large cleanly if not with a relay ?

I can magnetize metal objects,but only weakly. The field is very strong in the pot,as i placed a speaker magnet in there,and hit the button while holding it with my hand. It blew my hand out of the pot no problem at all--and i was holding it with a fair bit of force. I think the unclean switching is why i cannot get a good permanent magnet to form.


Brad

Free Energy | searching for free energy and discussing free energy

Re: 47000 Watt Magnetizer
« Reply #32 on: November 29, 2015, 01:53:49 PM »
Sponsored links:




Offline picowatt

  • Hero Member
  • *****
  • Posts: 1988
Re: 47000 Watt Magnetizer
« Reply #33 on: November 29, 2015, 01:59:16 PM »
Hi Carroll

No,the wire is not to small,as it is 12mm in diameter,not 12mm square area.The cable i am using is from the machine that had this battery bank in it,and as we heard from PW not so long ago,it dosnt take to much to gain instantaneous current,which is a lot different to that of continuous current.


Brad


What???

I have no idea what this comment is in regards to.

PW

Offline tinman

  • Hero Member
  • *****
  • Posts: 5240
Re: 47000 Watt Magnetizer
« Reply #34 on: November 29, 2015, 02:12:27 PM »

What???

I have no idea what this comment is in regards to.

PW

In regards to a small wattage valued resistor being able to deliver a large amount of instantaneous current to a load in a pulsed situation. Of course in this case we are talking about 350 amp cables being able to handle say a quick 1000 amp pulse,due to the fact that the amp rating for cables is continuous.

Free Energy | searching for free energy and discussing free energy

Re: 47000 Watt Magnetizer
« Reply #34 on: November 29, 2015, 02:12:27 PM »
Sponsored links:




Offline picowatt

  • Hero Member
  • *****
  • Posts: 1988
Re: 47000 Watt Magnetizer
« Reply #35 on: November 29, 2015, 02:36:51 PM »
In regards to a small wattage valued resistor being able to deliver a large amount of instantaneous current to a load in a pulsed situation. Of course in this case we are talking about 350 amp cables being able to handle say a quick 1000 amp pulse,due to the fact that the amp rating for cables is continuous.

Tinman,

That was only with regards to dissipation.  It has nothing to do with somehow being "easier" to produce instantaneous versus continuous current.

A lower wattage resistor can handle a VI product for a short period of time that would otherwise cook that resistor if applied continuously.  That discussion was with regard to duty cycle, CVR wattage ratings, and primarily your 85 watts comment in that other thread.  This has little to do with what you are attempting to do and nothing to do with somehow being "easier" to produce instantaneous currents.

Possibly the linked document may be of interest to you:

http://www.oersted.com/magnetizing.PDF

PW

Offline picowatt

  • Hero Member
  • *****
  • Posts: 1988
Re: 47000 Watt Magnetizer
« Reply #36 on: November 29, 2015, 03:24:55 PM »
Tinman,

Do you have any idea what kind of current you are pulling?

If the bulk of that 25 or so volt drop is across your relay contacts and at a large current, I'd be very concerned about the relay contacts welding together.  Be careful.

Have a plan for disconnecting the batteries (or you will find out which part of the circuit is dissipating too much, overheats,  and "fuses" open first).  At the least make sure that all your wiring, relay, and fixture is positioned away from flammable materials so that in the event of something catching fire it won't propagate quickly.  You should also have a fire extinguisher close by.

PW


Free Energy | searching for free energy and discussing free energy

Re: 47000 Watt Magnetizer
« Reply #36 on: November 29, 2015, 03:24:55 PM »
Sponsored links:




 

OneLink