Variable high frequency conversion from 50-60 Hz to HF?

[J_Nichols]

The wall power is rated at 50 to 60 cycles per second. I want to feed a circuit with that energy (50 - 60 Hertz) and obtain a higher frequency output, pure sinusoidal wave. Preferably, it can be tuned from around 100 hertz to 30 kilohertz.
The output wattage must be at least 300 watt.

 

[kubeek]

300W into what kind of load?

 

[Ramussons]

What's the purpose of picking up the harmonics to 300 Watts? Why not have a VFO with a High Power Amplifier?

 

[J_Nichols]

300W into what kind of load?

Light bulb

 

[J_Nichols]

What's the purpose of picking up the harmonics to 300 Watts? Why not have a VFO with a High Power Amplifier?

What is a VFO?

 

[cowboybob]

Variable Frequency Oscillator.

Much easier and far more accurate to use a mains (50-60 Hz) powered VFO which is then fed into an amplifier to attain the power out you need.

And why the higher frequency for a light bulb?

 

[Nigel Goodwin]

And why the higher frequency for a light bulb?

You just know it's going to be some over unity scheme or something else silly

Can you even buy light bulbs now?, aren't they pretty well banned?.

 

[cowboybob]

Can you even buy light bulbs now?, aren't they pretty well banned?.

Surprisingly, at least here, Yes.

Perhaps old stock, though...

 

[kubeek]

Light bulb

Seriously? You might as well have said a potato. What I was asking was what impedance does the intended load have.
Nevertheless, why do you want to feed 30khz into a light bulb? The filament has so much thermal inertia that it the frequency will have no effect on anything.

 

[J_Nichols]

Variable Frequency Oscillator.

Much easier and far more accurate to use a mains (50-60 Hz) powered VFO which is then fed into an amplifier to attain the power out you need.

And why the higher frequency for a light bulb?

Hello again and thank you very much for the messages.

I see, I have searched in Google and I have found more info about the variable frequency oscillator.

I am just learning about electronics and I want to perform some observation with high frequency electricity. Just learning and experimenting.

 

[J_Nichols]

Seriously? You might as well have said a potato. What I was asking was what impedance does the intended load have.
Nevertheless, why do you want to feed 30khz into a light bulb? The filament has so much thermal inertia that it the frequency will have no effect on anything.

Just experimenting and learning. Do you suggest to use another different load instead of an incandescent light bulb? Which one?

 

[kubeek]

It would be best to start by saying what is the purpose of the device you want to make. Why did you choose 300W? Why 100Hz to 30kHz?

When you answer that the replies will then be more aimed at helping you in your goal rather then trying to guess dozens of unknowns from vague posts. Please describe as much as you can about what you actually want to achieve.
Do you really need 300W? That is an awful lot of power, and judging your level I have trouble seeing why you would want that much.

 

[Nigel Goodwin]

Just experimenting and learning. Do you suggest to use another different load instead of an incandescent light bulb? Which one?

What kind of experiments are you hoping to do?, and what do you hope to learn? - it's seems particularly specialised and of very little use for learning (it will also be pretty expensive to do).

 

[J_Nichols]

It would be best to start by saying what is the purpose of the device you want to make. Why did you choose 300W? Why 100Hz to 30kHz?

When you answer that the replies will then be more aimed at helping you in your goal rather then trying to guess dozens of unknowns from vague posts. Please describe as much as you can about what you actually want to achieve.
Do you really need 300W? That is an awful lot of power, and judging your level I have trouble seeing why you would want that much.

The numbers (frequency and wattage) are not critical values, only approximations.

Of course, I am going to describe as much as possible but remember that maybe it's not enough for you.

The experiment I want to perform is wireless energy transmission. I want to transmit energy using coils, lc tank, etc...
I have read about some people in the internet that uses high frequency because it seems that frequency plays an important role when you try to send energy wirelessly. Also when resonating a lc tank, I need to vary the frequency of the AC input to match the resonant frequency of the parallel tank. Well, it's all about experimentation. Why 300 watts? Because I have thought that with 300 watts it will be possible to light 3 or 4 incandescent light bulbs. Maybe with just only 1 bulb, 50 watts, it also will be ok.

 

[J_Nichols]

What kind of experiments are you hoping to do?, and what do you hope to learn? - it's seems particularly specialised and of very little use for learning (it will also be pretty expensive to do).

Wireless energy transmission, for more details read the above post.

 

[alec_t]

The experiment I want to perform is wireless energy transmission

You'll have the authoritiess knocking on your door in no time, unless you do your experiments inside a Faraday cage! Wireless transmissions are easily detected, and are illegal in most jurisdictions unless you have a licence for transmission within authorised frequency bands.

 

[tcmtech]

I would just go with a signal generator feeding into a common multi hundred watt audio amplifier and make your coil impedances to be close to the amplifiers rated output impedance range.

 

[kubeek]

300W is way too much for wireless power transmission. Even 1W is too much. I was trying to get power from a typical 13.56MHz RFID card reader, and the most I could get was roughly 50mW at the receiving end, that is using air coils.

If you use ferrite cores and short distance you might get better transmission, the magnetic coupling is the key. However the more coupling you have the closer you are to a transfomer and the further you are from wireless transmission.

 

[J_Nichols]

I would just go with a signal generator feeding into a common multi hundred watt audio amplifier and make your coil impedances to be close to the amplifiers rated output impedance range.

I take note, I think it's ok.

 

[J_Nichols]

300W is way too much for wireless power transmission. Even 1W is too much. I was trying to get power from a typical 13.56MHz RFID card reader, and the most I could get was roughly 50mW at the receiving end, that is using air coils.

If you use ferrite cores and short distance you might get better transmission, the magnetic coupling is the key. However the more coupling you have the closer you are to a transfomer and the further you are from wireless transmission.

When you speak about magnetic coupling, do you mean inductive resonance? Explain that in more detail please.