so the conclusion i drew from this: If i turn an electric motor by hand, it would be easier if i connected both of the leads. did i understand this correctly?
thank you for the video...however i still have trouble with the y voltage. If you forcefully stop the motor from turning you should get a sharp increase in current right? but why is it showing that you get a higher voltage instead? doesnt P=VI ? If someone could clarify this for me it would be appreciated!
@TheNam2 I only have a limited understanding but I'll attempt to explain. The "X" voltage is supplied from an outside source i.e. a battery etc. the "Y" voltage is created by the by the spinning rotor and Faraday's law: A changing magnetic flux moving through a conductor will induce an EMF. To maintain the law of conservation and Lenz's law the induced emf, Y, must move in the the opposite direction. Y<X. So in regards to your question Work voltage is smaller as it equals X minus Y
The way you turn your coil also makes it negitive or positive. If you go clockwise turn you should get a negitive field and if you whind the coil counter clockwise then you get a postive field coil. Basically you are changing north and south ends of the coil but not electically but mechanically. If you did a coil with with a primary and two other whindings you should be able to get your ac back when the primary coil collapes.
So when I run say, a hand cranked motor which generates electricity, the main resistance opposing my cranking motion is this back emf? Or the resistance of the wires? Im confused. Care to clarify?
It can be seen as if the current builds a momentum, like water in plumbing, when you suddenly try to stop it it (close the tap) it tries to continue and a pressure spike builds up.
With the EM you will get voltage spikes and the tension is dependent upon the current and the speed with which it is interrupted..
Often, to protect against these spikes, diodes (Zener or regular in reverse) can be used, or a resistor/capacitor "snubber" (impractical at high currents and frequencies)..
At 4:07 I think you have the Y direction incorrect compared to your words. When an inductor sees the voltage drop to zero, EMF sustains the voltage in the same direction, X, not reverse direction.
The reverse direction, Y, occurs when X first rises from zero to full voltage and EMF opposes that rise.
vrvandjjk is snagged on this same issue, I think.
I will replay the video. Maybe I misunderstood it.
I have a coil pulsed rapidly by square wave voltage. 30 volts peak to peak. Would two series strings of nine 3 volt LEDS (27 volts) clip the back EMF from damaging my function generators 30 volt output. Those strings would be opposite but in parallel across the generator output. What resistor value would be needed in each string?
I do have a question. Why can't you run it into a full wave bridge rectifier? If you are using a full square wave, it should work, shouldn't it? just wondering, not arguing.
u can run it to a bridge the only prob is that it does not last very long :) i think the very high voltage coming out kiils the bridge, but im not sure...
yeah thats correct the fucking bmf is the source of free energy. Im very idiot that I dont believe at first in what they say and now Ive been confirm it.
@techadik1 Just to mention it, you can't see voltage as energy output, it is simple a tension, to have "work" (effect) there must also be a charge "volume" (f.ex. Coloumb) - to provide a current.
Effect is measured f.ex. in Watts, which is the combined result of voltage * current (U*I) again dependent on resistance/reactance.. (R).
This means that you can raise the voltage but not necessarily the energy stored or gained.
A, TL lamp starts becourse the current flow is broken and the magnetic field collaps to upposed poolse,the collapsing magnetic field gives a hihger tension to the same direction off the current flow,not back,so i have learnt,what you say?
When the switch is open you can catch the hihg tension current and make it larger in a coil with condenser and diode so it is trapt.Or put it to a other larger coil and c. ,break the current again and again.
Hm .. You are right about not breaking the laws of physics - this is simple induction. Dc - Dc stepup converters work that way . But the Power (Voltage * Current !!!!!) you supply to your primary system can't be higher then the output. the voltage might be far greater , but not the current is much weaker , or the time periode is shorter or whatever . And : a multiphase generator uses all voltages which are generated in the coil .. but its still very far from beeing 100% efficient...
@breakthemachine nice worK! i remember reading an electrical book and always was amazed that they talked of more energy in the back emf and that it was "useless". but it definatly is not! thanks alot! theres also a voltage equation for back emf. its an inverse something to do with the time, so that if u really break the circuit really fast u could theoretically get 1000s of times the input voltage!! peace!
I understand your thinking. All I ask is that you read up on the property of inductors. Bedini is not changing the laws of electricity, he is just using unconventional methods in a conventional circuit. Think of the charge battery as a conductor that is hit with electrons on the neg and has electrons pulled off the pos. Here's simple vid on using batteries as conductors and charging them at the same time, just replace pulse motor with pulsing coil. watch?v=zP4dfxXhxxg
tnkx for the vid man, loved the pulser motor idea, however... he charges the 4B in parallel with 2B in series which means hes got twice the voltage on the two and thats how he manages to use the 4B as conductors. every time u charge any battery u basically use it as a conductor. u don't actually put electrons in it (as some people think).
take a bifilar wound coil so u have 4 wires, and just pulse some current into the primary while connecting a LED to the secondary and u will see the charge polarity when it comes out of the secondary reverses. i call it back EMF because its literally is back EMF u can call it whatever u like it doesn't matter as long as we are talking about the same thing.
Have to think deep on that. Seen demos light dual LEDs with reversed polarity by pulsing a coil. One LED lights switch ;the other lights when the switch is off leading you to think that the coil has collapsed the current in a reverse direction. But there is something more to it than meets the eye. DC current doesn't reverse. Now I just have to figure out how to demonstrate and explain it. Keep up the experiments. I'm not trying to prove you wrong, I'm still figuring all this out myself.
I have to take the 5th on the charging issue. I do know that the pulse motor, splitting the positives only works if the source battery is higher voltage than the conductor battery. Kind of like water not running across a level.
If you research the properties of inductors you see that when the magnetic field collapses it induces a voltage into the wire but in the same direction as original current flow. This voltage will spike and ruin switches and other sensitive circuit components.
What I gathered was that Bedini was trying to induce that spike in a secondary coil in a transformer like action and divert it to a charge battery.
That is why I have a problem with back EMF. It isn't a property of inductors.
Back EMF is a property of inductors/electromagnets. Back EMF is a temporary opposition to current flow in an electromagnet when the magnetic field is created. Once the field is created the current flow is unopposed.
Bedini is not capturing back EMF, he is attempting to charge batteries with the high voltage spike that naturally occurs when an electromagnetic field collapses.
the start of ur statement is precise, and i quote "Back EMF is a temporary opposition to current flow in an electromagnet when the magnetic field is created..." and collapsed. every time that u pulse the current through there will be back emf. thats why bedini does not have a continuous flow of electricity (you would be right if it was), bedini pulses the electricity on and off using a transistor thus generating back EMF on every pulse. all the best mate :)
But he is not capturing back EMF. He is capturing the collapsing coil voltage spike and that spike is in the same direction of flow as the current that generated the magnetic field in the coil.
i have to disagree with u there, because he is connecting the - to the + side of the charging battery and the + to the - ....because the generated electricity coming out of the collapsing coil reverses. i might be wrong but that's what i gather from my testings.
Two coils, one connected to magnetize the core, then disconnect first coil's input, and energy then in the coil would prefer to exit through second coil because that circuit is closed, so it charges the second battery? I wonder how that circuit can be closed all the time without draining second battery.
im not sure i understand what u mean, but John Bedini (bedini motor) recovers the back emf with a second battery.and the energy in the coil will get out where it can, if u let it, it will get out of the first coil.
sorry m8,i removed ur comment instead of replying to it :( (too early in the morning)... i consider back emf to be much less complicated.when there is a change in magnetic field in a coil, electricity will be produced (abc of electricity) now, when u connect a coil to a power source there is a fast magnetic change in the coil,so electricity is generated the other way and cancels some of ur current(self inductance)same happens when u turn it off (except current is generated the other way)
i get it all its top stuff but wat u mean when u mention that after u concentrate the magnetic flux at the poles by the iron core "the magnetic field collapses how is that possible ???
well... when u send current into coil it becomes a magnet... when u stop the current flow, the magnetic field collapses, and that change in the magnetic field through the coil will induce current going the other way. i hope that helps, if you still unsure just ask.
so the conclusion i drew from this: If i turn an electric motor by hand, it would be easier if i connected both of the leads. did i understand this correctly?
Pivotseb 1 month ago
great
MrNotone 3 months ago
I have never heard it explained that way before....that's awesome...!
TheWisdomwalker 3 months ago in playlist More videos from breakthemachine
Hmmm at least now I know my grasp of back emf was correct. Thnx for your video, a nice one.
Marty
maartenkersten 6 months ago
thank you for the video...however i still have trouble with the y voltage. If you forcefully stop the motor from turning you should get a sharp increase in current right? but why is it showing that you get a higher voltage instead? doesnt P=VI ? If someone could clarify this for me it would be appreciated!
TheNam2 7 months ago
@TheNam2 I only have a limited understanding but I'll attempt to explain. The "X" voltage is supplied from an outside source i.e. a battery etc. the "Y" voltage is created by the by the spinning rotor and Faraday's law: A changing magnetic flux moving through a conductor will induce an EMF. To maintain the law of conservation and Lenz's law the induced emf, Y, must move in the the opposite direction. Y<X. So in regards to your question Work voltage is smaller as it equals X minus Y
Reuben235 6 months ago
Great video... provides excellent explanation of how the Bedini motor is able to achieve extra-ordinary efficiencies. Highly recommend!
coldfusion12 7 months ago
Good explanation on coils and collapsing fields
DrSaminstine 8 months ago
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ilavsompussy 8 months ago
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ilavsompussy 8 months ago
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ilavsompussy 8 months ago
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ilavsompussy 8 months ago
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ilavsompussy 8 months ago
Why is the back emf generated less than the original emf? As in, why is Y < X?
thebrainyflip 8 months ago
The way you turn your coil also makes it negitive or positive. If you go clockwise turn you should get a negitive field and if you whind the coil counter clockwise then you get a postive field coil. Basically you are changing north and south ends of the coil but not electically but mechanically. If you did a coil with with a primary and two other whindings you should be able to get your ac back when the primary coil collapes.
egn83b 9 months ago
So when I run say, a hand cranked motor which generates electricity, the main resistance opposing my cranking motion is this back emf? Or the resistance of the wires? Im confused. Care to clarify?
paulazarel 9 months ago
you sir, are awesome.
no fail physics for me! yay
benshun69 10 months ago
It can be seen as if the current builds a momentum, like water in plumbing, when you suddenly try to stop it it (close the tap) it tries to continue and a pressure spike builds up.
With the EM you will get voltage spikes and the tension is dependent upon the current and the speed with which it is interrupted..
Often, to protect against these spikes, diodes (Zener or regular in reverse) can be used, or a resistor/capacitor "snubber" (impractical at high currents and frequencies)..
Kenzofeis 11 months ago
Thanks for this, this was the only thing in electricity that i came across and fucked my mind.
Maxpow33r 1 year ago
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faerydhhlo 1 year ago
Nice video!
I am a novice so maybe I am going to ask a stupid question but here it is ...
The electro magnetic force created by a coil is directly proportional to the current flowing through the wire i.e. independent of voltage.
But is back EMF independent of voltage?
levettp 1 year ago
thats pritty much what a dynamo is ya? a motor spun backward. like a motor generator on a mountain bike makes the light work
AxelTiger 1 year ago
hola... ¿habra algun alma piadosa en youtube que baje este video y lo subtitule en español??? porfavor... :)
darquinteros 1 year ago
Legge di Lenz - fenomeno di autoinduzione
67beppedoc 1 year ago
Thanks! I needed to know for physics how back emf was taken care of in a motor!
Although I do have one question, and it may be slightly irrelevant haha; What accent is that you have?
Geeeeoheffeff 1 year ago
At 4:07 I think you have the Y direction incorrect compared to your words. When an inductor sees the voltage drop to zero, EMF sustains the voltage in the same direction, X, not reverse direction.
The reverse direction, Y, occurs when X first rises from zero to full voltage and EMF opposes that rise.
vrvandjjk is snagged on this same issue, I think.
I will replay the video. Maybe I misunderstood it.
definitionofis 2 years ago
I have a coil pulsed rapidly by square wave voltage. 30 volts peak to peak. Would two series strings of nine 3 volt LEDS (27 volts) clip the back EMF from damaging my function generators 30 volt output. Those strings would be opposite but in parallel across the generator output. What resistor value would be needed in each string?
64298 2 years ago
Great video. 100% correct on all levels.
I do have a question. Why can't you run it into a full wave bridge rectifier? If you are using a full square wave, it should work, shouldn't it? just wondering, not arguing.
much respect.
VonGoetzi 2 years ago
u can run it to a bridge the only prob is that it does not last very long :) i think the very high voltage coming out kiils the bridge, but im not sure...
breakthemachine 2 years ago
yeah thats correct the fucking bmf is the source of free energy. Im very idiot that I dont believe at first in what they say and now Ive been confirm it.
techadik1 1 year ago
@techadik1 Just to mention it, you can't see voltage as energy output, it is simple a tension, to have "work" (effect) there must also be a charge "volume" (f.ex. Coloumb) - to provide a current.
Effect is measured f.ex. in Watts, which is the combined result of voltage * current (U*I) again dependent on resistance/reactance.. (R).
This means that you can raise the voltage but not necessarily the energy stored or gained.
Kenzofeis 11 months ago
A, TL lamp starts becourse the current flow is broken and the magnetic field collaps to upposed poolse,the collapsing magnetic field gives a hihger tension to the same direction off the current flow,not back,so i have learnt,what you say?
When the switch is open you can catch the hihg tension current and make it larger in a coil with condenser and diode so it is trapt.Or put it to a other larger coil and c. ,break the current again and again.
But the current pulse gos forwards?
vrvandjjk 2 years ago
sorry vrvandjjk i could not understand the question i hope one of the viewers can understand it and help you.
breakthemachine 2 years ago
Hm .. You are right about not breaking the laws of physics - this is simple induction. Dc - Dc stepup converters work that way . But the Power (Voltage * Current !!!!!) you supply to your primary system can't be higher then the output. the voltage might be far greater , but not the current is much weaker , or the time periode is shorter or whatever . And : a multiphase generator uses all voltages which are generated in the coil .. but its still very far from beeing 100% efficient...
RoteKampfSocke 3 years ago
simple induction is right.this video has nothing to do with efficiency. it's here only to explain what back emf is.
breakthemachine 3 years ago
@breakthemachine nice worK! i remember reading an electrical book and always was amazed that they talked of more energy in the back emf and that it was "useless". but it definatly is not! thanks alot! theres also a voltage equation for back emf. its an inverse something to do with the time, so that if u really break the circuit really fast u could theoretically get 1000s of times the input voltage!! peace!
boxa888 1 year ago
I understand your thinking. All I ask is that you read up on the property of inductors. Bedini is not changing the laws of electricity, he is just using unconventional methods in a conventional circuit. Think of the charge battery as a conductor that is hit with electrons on the neg and has electrons pulled off the pos. Here's simple vid on using batteries as conductors and charging them at the same time, just replace pulse motor with pulsing coil. watch?v=zP4dfxXhxxg
AlienNRG 3 years ago
tnkx for the vid man, loved the pulser motor idea, however... he charges the 4B in parallel with 2B in series which means hes got twice the voltage on the two and thats how he manages to use the 4B as conductors. every time u charge any battery u basically use it as a conductor. u don't actually put electrons in it (as some people think).
breakthemachine 3 years ago
take a bifilar wound coil so u have 4 wires, and just pulse some current into the primary while connecting a LED to the secondary and u will see the charge polarity when it comes out of the secondary reverses. i call it back EMF because its literally is back EMF u can call it whatever u like it doesn't matter as long as we are talking about the same thing.
breakthemachine 3 years ago
Have to think deep on that. Seen demos light dual LEDs with reversed polarity by pulsing a coil. One LED lights switch ;the other lights when the switch is off leading you to think that the coil has collapsed the current in a reverse direction. But there is something more to it than meets the eye. DC current doesn't reverse. Now I just have to figure out how to demonstrate and explain it. Keep up the experiments. I'm not trying to prove you wrong, I'm still figuring all this out myself.
AlienNRG 3 years ago
tnkx mate, i wish u were in Australia so we can put our mind together. good luck with everything
breakthemachine 3 years ago
I have to take the 5th on the charging issue. I do know that the pulse motor, splitting the positives only works if the source battery is higher voltage than the conductor battery. Kind of like water not running across a level.
AlienNRG 3 years ago
If you research the properties of inductors you see that when the magnetic field collapses it induces a voltage into the wire but in the same direction as original current flow. This voltage will spike and ruin switches and other sensitive circuit components.
What I gathered was that Bedini was trying to induce that spike in a secondary coil in a transformer like action and divert it to a charge battery.
That is why I have a problem with back EMF. It isn't a property of inductors.
RNMoose 3 years ago
have a look at my latest video on how bedini works, i think it will help.
breakthemachine 3 years ago
Back EMF is a property of inductors/electromagnets. Back EMF is a temporary opposition to current flow in an electromagnet when the magnetic field is created. Once the field is created the current flow is unopposed.
Bedini is not capturing back EMF, he is attempting to charge batteries with the high voltage spike that naturally occurs when an electromagnetic field collapses.
AlienNRG 3 years ago
the start of ur statement is precise, and i quote "Back EMF is a temporary opposition to current flow in an electromagnet when the magnetic field is created..." and collapsed. every time that u pulse the current through there will be back emf. thats why bedini does not have a continuous flow of electricity (you would be right if it was), bedini pulses the electricity on and off using a transistor thus generating back EMF on every pulse. all the best mate :)
breakthemachine 3 years ago
But he is not capturing back EMF. He is capturing the collapsing coil voltage spike and that spike is in the same direction of flow as the current that generated the magnetic field in the coil.
AlienNRG 3 years ago
i have to disagree with u there, because he is connecting the - to the + side of the charging battery and the + to the - ....because the generated electricity coming out of the collapsing coil reverses. i might be wrong but that's what i gather from my testings.
breakthemachine 3 years ago
@AlienNRG - does that work? can you charge batteries with the high voltage spike?
TruthKnowledgeDOTcom 2 months ago
That was great. well done sir!
webovisionca 3 years ago
many thanks...
breakthemachine 3 years ago
Thank you!
Great explanation and easy to watch which helps when your trying to grasp the basics
Top chap!
mickphoenix 3 years ago
most welcome!
breakthemachine 3 years ago
Two coils, one connected to magnetize the core, then disconnect first coil's input, and energy then in the coil would prefer to exit through second coil because that circuit is closed, so it charges the second battery? I wonder how that circuit can be closed all the time without draining second battery.
recbo 3 years ago
im not sure i understand what u mean, but John Bedini (bedini motor) recovers the back emf with a second battery.and the energy in the coil will get out where it can, if u let it, it will get out of the first coil.
breakthemachine 3 years ago
sorry m8,i removed ur comment instead of replying to it :( (too early in the morning)... i consider back emf to be much less complicated.when there is a change in magnetic field in a coil, electricity will be produced (abc of electricity) now, when u connect a coil to a power source there is a fast magnetic change in the coil,so electricity is generated the other way and cancels some of ur current(self inductance)same happens when u turn it off (except current is generated the other way)
breakthemachine 3 years ago
Free 90v, 200ma, 15watts
/watch?v=Kdup42Epq0o
calfellows59 3 years ago
i get it all its top stuff but wat u mean when u mention that after u concentrate the magnetic flux at the poles by the iron core "the magnetic field collapses how is that possible ???
sth5desldr 3 years ago
well... when u send current into coil it becomes a magnet... when u stop the current flow, the magnetic field collapses, and that change in the magnetic field through the coil will induce current going the other way. i hope that helps, if you still unsure just ask.
breakthemachine 3 years ago
This video is fantastic!!!
You explain back EMF really clearly. Keep it up! Thank you for making my life easier in physics!
Tim
Damianandtim 3 years ago
you're welcome :)
breakthemachine 3 years ago
Your videos are fantastic. PLEASE keep them coming.
Your expanations of how things work are truly amazing. Even a big dummy like me can uderstand.
Thank You.
RHEAD100 3 years ago
thanks mate :)
breakthemachine 3 years ago
thats a clearer and better explanation than Lindemann gave after 2 hours!
byjoveoldchap 3 years ago
many thanks :)
breakthemachine 3 years ago
"Why? Because that's what motors do."
lol!
introvertebrate 3 years ago
lol
breakthemachine 3 years ago
Great vid.
It is my theory that back EMF is similar to back pressure in a steam system.
Voltage is pressure. In a closed steam system, when steam condenses back into water it pulls a vacuum. This force is strong.
The collapse of a magnetic field is basically the same principal as condensing steam.
USACitizenJames 3 years ago
i think you might be on to something :)
breakthemachine 3 years ago