Joule Thief 101

[tinman]

Yeah, the dc coil thing seems like a cunundrum.  Was reading a book on electric motors by Irving Gotleib. May not have spelled that right. But one thing he said was with motors and gens, there are 3 requirements.  Electricity, AC and   or DC, magnetic fields, and the third is motion.  Missing any of the 3 and its not a motor or a gen. Could get into static electric field motors, and the mag fields are there, whether they play a magnetic push and pull could be the reason there is attraction and repulsion between HV charged leafs and other plates and things, like Lasersabers electric field motors, is something that may be a miss.

So  if we look at the field of a coil with dc on it, other than producing  the 'stationary' field, it is doing no work, unless say it were to be picking up things or clamping something to a wall, but thats totally something else. We are talking motor/gen action.  Also the reverse, if a magnet is stationary near a coil, and no motion, then no current. 
I know you know all this stuff, but it helps for readers that dont have that understanding. Ive thought the same things as you on that subject. Weird stuff when you try to think deep into it.

Mags

The biggest mixup comes when some use AC and DC to describe voltage,and not current. Then there are those that think a direct current means a continuous current without amplitude change.
They see a current wave form in the shape of a sine wave,and think the current is AC,when in fact,the direction of current remains the same,but where only the amplitude of that current changes.

Brad

[tinman]

I don't know if the quote above is due to your complete and total lack of critical thinking skills and total blindness to any kind of context, or, if it is just more completely useless trash talk.

Either way, it is a total fail.

Lol
No fail on my behalf MH.
Do you even read what you post?.

You did not find a link stating that resonance in the combustion chamber was a benefit like you said you would.

And here is what i said--what you quoted me as saying
I will dig up some more info for you ASAP.
Like I said, there is truth in what you say about unwanted resonance. But that truth also dismisses your claim about there being no resonance what so ever within the internals of the ICE ir self.
They use information gathered around these resonant effect to increase the efficiency of the ICE.

Where exactly did i state that resonance in a combustion chamber would be beneficial ?.
That's right--nowhere.
Like i said,you need to read a little better.
Here is what my statement said- there is truth in what you say about unwanted resonance
They use information gathered around these resonant effect to increase the efficiency of the ICE
Is it that hard to understand MH?. If they find an unwanted resonance,they reshape the internal's(in this case ,the piston) to remove that unwanted resonance,and increase the efficiency of the engine.
So,once again you failed to catch me out-as you continually do.
It is clear that i said nothing about this internal resonance increasing the engines efficiency--like you have tried to claim.

So another fail on your behalf MH.
You tried once again to say i said things i did not,and you once again got caught out.
This is becoming a habit with you.

Brad

[minnie]

   tinman,
           what do you think of Einstein?
An Einstein Cross must have some merit?
          John.

[tinman]

tinman,
       would you agree with Koala's point about a super-conductor?
                   John.

To which point are you referring to?.


Brad

[minnie]

Now you are getting it. In the DC case, the magnetic field is set up while the current is changing during the "switch on" time of the current. Once the current is flowing at a steady rate, it "costs" nothing more to maintain the magnetic field, and the field itself doesn't dissipate power. This is how superconducting magnets work. The situation is perfectly symmetrical. You get no current produced from a stationary magnet sitting next to a coil, because there is nothing changing. Move the magnet (or the coil), so that the coil experiences a changing magnetic field, and you get current.  Remember Faraday's Law of Induction (and pay no attention to the confused ravings of EMJunkie): The induced EMF is proportional to the _time rate of change_ of the linked magnetic field. You can take this algebraic equation and re-arrange it according to ordinary algebra, and see that the two situations are indeed symmetrical. The "conundrum" comes from mis-stating the problem or situation in the first place.