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Question about Transformers and pulsed AC and DC.

davenn

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similar to how an SMPS pulses regular 50-60hz AC on and off at like 40-100Khz? is that what you're trying to say?

Proschuno
for your info....
thats not how a mains SMPS works
the AC mains is rectified and smoothed before going to the chopper circuit and assoc transformer

Dave
 

Proschuno

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Oh sorry well that's sort of what I meant... But I see what zip is trying to say
 

(*steve*)

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So will a vibrating(ultrasound tuned at 1ghz through the wire) transformer be able to attract a 1Ghz RF DC signal via resonance?

Only if you employ magical thinking.
 

BobK

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1 GHz ultrasound. I guess that makes microwave ovens an ultrasound device as well, at 2.45 GHz. I wonder if dogs can hear them?

Bob
 

Zip1234

Jun 13, 2013
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The ultrasound vibrates the transformer and the magnetic field that s inside of the transformer causing a resonant inductive circuit.

http://en.wikipedia.org/wiki/Wireless_Resonant_Energy_Link
http://en.wikipedia.org/wiki/Resonant_inductive_coupling

A modulated signal goes into the power transformer and then is coupled by the resonant frequency of the circuit.

Only problem is trying to do something like this without frying the transformer and being sued by the power company for damages to their infrastructure(and anyone else's).
 

davenn

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yeah ok but 1GHz isnt ultra-sound ;)

20kHz to ~ 100kHz is ultrasound

I again suggest what steve suggested many posts back
there are ways for putting a digital signal onto a power line

google BPL

But its a VERY DIRTY way of communicating data/voice or whatever
it causes masses of interference. A lot of the commercial installations around the world were forced to shutdown because of the intereference they caused to broadcast radio/TV and amateur radio operations

I wouldnt wanna live within 5 miles of you if you were messing with that sort of thing

now ya see ... if you had explained clearly what you were trying to do, way back in your first post or 2 ... we could have saved 20 posts of trying to figure out what you were on about ;)
and with your poor descriptions etc it shows that you have an obvious lack of knowledge with electronics, You dont seem to have the saftey know-how to do a project like this
you should really be looking at commercial units :)

Dave
 
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(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Well, perhaps you're going to explain to us how you're going to set up a sound with a frequency of 1GHz, and how that's going to affect the transformer.
 

Zip1234

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A compression wave(sound)can vibrate at extremely high frequencies just like a radio waves and light waves can.

You just need a transducer that can produce ultrasound at that frequency.

http://www.popsci.com/scitech/article/2009-03/sound-becomes-light

"According to Evan Reed, one of the authors of the study, converting sound to light itself is novel, because there is only a very narrow frequency range -- around 100 GHz to 10 THz -- where sound and light waves overlap."

http://en.wikipedia.org/wiki/Ultrasound#History

"High and ultra high ultrasound waves are used in acoustic microscopy, with frequencies up to 4 gigahertz. Ultrasonic imaging applications include industrial non-destructive testing, quality control and medical uses."

It is possible and is being used for medical imaging.

What I am asking is can this ultrasound have an effect on the magnetic field that is both inside a tranformer and the unshielded wires.
 

davenn

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http://www.popsci.com/scitech/articl...-becomes-light

"According to Evan Reed, one of the authors of the study, converting sound to light itself is novel, because there is only a very narrow frequency range -- around 100 GHz to 10 THz -- where sound and light waves overlap."

that page doesnt exist error 404
I would have to see some good peer reviewed science papers to back any claims like that up

You do understand that sound waves are not like radio/light waves dont you?
Sound is a mechanical compression wave
radio and light is an electromagnetic emission consisting of packets of photons
and 100GHz EM emission is way way below any wavelength of light in the IR or visible spectrum

IR starts at 300GHz (1mm wavelength) and goes up to 430 THz ( 700 nm wavelength)

Also EM radiation extends all the way down to at least 10kHz ;) wich is well within the equiv. sound freq of human hearing capability

Dave
 
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