Exploiting BACK EMF from pulsed DC transformer - Page 1
Forum section: electronics / general

author: leofree1980
author_rank: Newbie
timestamp: December 30, 2017, 06:44:15 pm
content: HiWhat do you think about this transformer?Transformer with Embedded Magnets to redirect Magnetic flux so No CEMF against no degradation of source energy coil.https://img15.hostingpics.net/pics/86449952631775m1.png

author: EEVblog
author_rank: Unknown
timestamp: December 31, 2017, 01:12:26 am
content: Quote from: leofree1980 on December 30, 2017, 06:44:15 pmIt's a transformer with losses.Welcome to the real world.

author: station240
author_rank: Unknown
timestamp: December 31, 2017, 01:37:49 am
content: To expand on what Dave said.When you put power into the transformer, the magnets will resist some of the current. When you try to draw power out of the transformer, you draw power from the coil and the core, but not the magnets.Transformers always have, and always will be AC devices, pulsed DC is converted to AC, use a oscilloscope to look at the waveforms.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: December 31, 2017, 06:26:48 am
content: Hmm... troll or spam (or nutter) warning. Same post appears on All About Circuits*, EDABoard and DutchForce, and probably others. New registered user, single post, no follow-ups yet.*Their moderators probably deleted it already. It shows up on Google search results at this moment, but the post is 404.Tim

author: leofree1980
author_rank: Newbie
timestamp: January 07, 2018, 01:53:13 pm
content: HiThank you for replyI have make un improvement of this project like thishttps://img15.hostingpics.net/pics/7233530006.png

author: BravoV
author_rank: Super Contributor
timestamp: January 07, 2018, 02:01:57 pm
content: Quote from: leofree1980 on January 07, 2018, 01:53:13 pmAll of these are just "drawing" right ? I mean like picture as in cartoon for enjoyment ?

author: Gregg
author_rank: Super Contributor
timestamp: January 08, 2018, 03:44:12 am
content: I’m definitely not a transformer expert but it seems like the OP assumes that static magnetic fields will somehow lessen losses in the multiple core transformer scheme simply because the input is pulsed DC.If I remember correctly, a transformer works via the changes in magnetic fields generated by the primary winding(s). I somehow fail to see how magnets in the core will bias or enhance any magnetic changes and most likely will lessen the efficiency; especially with all of the added cores and windings shown in the picture. Maybe the OP can enlighten us further. Ferrite transformer cores are cheap on ebay and a relatively inexpensive diamond blade can cut them to pieces for the magnets to be glued in place. A relatively cheap mock up could show the unlikely merits or failure points. (Maybe even turn normal transformer losses into over unity gains???)

author: IanMacdonald
author_rank: Frequent Contributor
timestamp: January 09, 2018, 09:16:53 am
content: Many of these 'over unity' experiments rely on measuring power in pulsed circuits. What the experimenters fail to realise is that this is not easy to measure accurately. A frequent misconception is that because they are using true RMS meters, that VxI will always give power.The simple, reliable test would be if they can power the device from its own output (minus batteries) If they can do that, then I'll sit up and take notice.Though, there is one 'magnet motor' that runs for several minutes on the charge in a 10uF 25V capacitor. Not over unity though, just a very efficient design. I thought that was a cool bit of engineering work.

author: leofree1980
author_rank: Newbie
timestamp: January 11, 2018, 10:55:08 am
content: HelloThanks for your suggestionsLet us consider a simple version of this device:https://img15.hostingpics.net/pics/512773000000c6.pngBest regards

author: BravoV
author_rank: Super Contributor
timestamp: January 11, 2018, 11:31:18 am
content: Quote from: leofree1980 on January 11, 2018, 10:55:08 amThe problem is, what you've produced is just acartoonillustration that probably you've dreamed of.Show the real working photo of "real life" prototype & measurements results.

author: nctnico
author_rank: Super Contributor
timestamp: January 11, 2018, 11:06:04 pm
content: Quote from: leofree1980 on January 11, 2018, 10:55:08 amPlease stop wasting time and bandwidth with this idea. It can't work because it doesn't adhere to the law of physics which says energy has to be preserved. If you are going to measure your setup using the right tools then you'll find you get less energy from the output then you put into it due to losses. Energy cannot magically appear!

author: Gregg
author_rank: Super Contributor
timestamp: January 12, 2018, 02:59:04 am
content: Leofree 1980 should be encouraged to build prototypes of his designs and make a few youtube videos explaining his theories. Then get some true believer patrions to help fund further study and pay for some nice toys test equipment. After awhile this learning experience may evolve into something useful; or at least a basic understanding that physics and electricity are basically the same but from different perspectives.The possibilities are almost limitless; for instance add another magnetic loop and arrange them in a circle, stonehenge style so the magnetic fields don’t radiate out the ends. Then put some permanent magnets that rotate around an axle in the center and a couple of more coils phase shifted and reinvent the brushless DC motor or maybe something like this:Quote from: The Electrician on November 18, 2017, 06:10:39 am

author: leofree1980
author_rank: Newbie
timestamp: January 20, 2018, 05:06:52 pm
content: HelloThank your for your analysesI have not the necessary materials, but il will experiment this with the minimum and the simplest design like this:

author: Red Squirrel
author_rank: Super Contributor
timestamp: March 01, 2018, 06:44:00 pm
content: What happens if you connect the output to the input?

author: daqq
author_rank: Super Contributor
timestamp: March 02, 2018, 01:32:20 pm
content: QuoteNope.Try building it. If you really believe in it, you should not have a problem paying a pretty buck for the equipment and materials.