What is the easiest way to increase the cycles of electricity? Does anyone know a maximum amount of cycles that has been acheived? Any help is appreciated.
The minimal frequency is ...... 0 (clear direct current) and the maximum is ....... there is a huge range.
Frequency used in DC/AC converters is something about 15-20 kHz. If you want to beat Guinness record you can also create converter with much higher frequency.
I think you mean cycles as frequency.
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Yes I mean Cycles, Frequency, or Hertz. Yes Im looking to beat the world record on the highest frequency LOL So Im looking for coil configurations or electrical schematic examples in order to build one. Any advice or references? I know I can build a generator with a large number of poles, but I thinking there is an easier way. Thanks for your response!
Lotzalife
[ Added: 2006-11-15, 19:34 ]
Ahh but maybe Ive come up with something. Doesnt a flourescent light ballast operate at frequencies above 42,000 hz? Feed back appreciated.
Your question is a beginner's question. You will not beat the "world record". You can build a rotating AC generator for frequencies up to - I guess - a few KHz, after that you would build an electronic oscillator. Then you will need a laser. 42 KHz is not a high frequency. Have you heard of "radio waves"? They have frequencies of millions of Hertz, (MHz) billions of Hertz (GHz), thousands of GHz (THz, or Terahertz), after that you arrive at infra red, then comes visible light, then comes ultra violet light, then comes X rays, then gamma rays.
You need to learn about the "electromagnetic spectrum".
thats right but i think he asked about cycles(frequency) of alternate current not the radio or other waves.
There is no difference. The distinction between power frequencies and radio frequencies is purely a matter of convention. If you do not understand this how can you claim to be knowledgeable about electricity?
In the early days of radio there were four main methods of generating high frequency alternating current.
1. The spark or impulse generator.
2. The Poulsen arc generator.
3. The radio frequency alternator.
4. The vacuum tube oscillator.
Before 1914 a 2 kilowatt 100 KHz alternator was constructed for use in radio transmission. For frequencies much higher than this, one of the other methods would be used.
Last edited by contrex on 2006-11-18, 15:50; edited 1 time in total
What is the easiest way to increase the cycles of electricity?
That was the question
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He asked about cycles of electricity in wires :] not wireless.
Do you actually understand what I am talking about? He asks, "What is the maximum number of cycles that has been achieved?" Much above 100 KHz, the AC leaks out as radio waves. If you do not know this, you need to read more books.
Thank You for your responses. You are very much correct when you say Im a beginner Contrex. Of course its not actually my goal to beat the worlds record on attaining the highest frequency, just a very high AC frequency at a very high voltage.
1. Yes admin was correct, that I am looking to make reach these frequencies in wire, not wireless. But I think you have already answered that Contrex. Im assuming the electricity will stay in the wires until it reaches the 100K or so range, and that point it leaves the wire and becomes rf.
2. Am I correct in assuming an electronic oscillator would not be able to handle alot of amps? Im not sure why I would need a laser, I think you are inferring it is necessary as part of the electronic oscillator?
1. There is no strict rule that says below X Hz we use alternators, above X Hz we use electronic oscillators. It's just that it is easier and cheaper to get high frequency AC from an oscillator.
What do we want to do with the high frequency AC? It would be crazy to use it to light a lamp, you don't need a complex, expensive and unreliable high speed alternator for that.
The only big other use of high frequency AC is radio transmission. where we want to transfer the RF energy into an antenna and signal to somebody a long way away who has a receiver.
Before about 1920, electronic oscillators were primitive and only capable of low powers, so alternators were a good idea at the time. After that, frequencies and power output crept up, and the electronic oscillator could do everything the alternator could do, and much more. And much cheaper.
Alternators have an upper limit of a few dozen kilohertz. Consider this: A typical design of high frequency alternator was the Alexanderson alternator. One model produced 200 kW of output radio-frequency energy and would be water-cooled. One such machine had 600 pole pairs in the stator winding and the rotor was driven at 2170 RPM, for an output frequency near 22 kHz. To obtain higher frequencies, higher rotor speeds were required, up to 20,000 RPM. This is a very high speed for a rotating machine!!!
2. You can build an electronic oscillator as powerful as you like. A TV or radio transmitter can have a power output above 500 KW. This can be done using big (I mean BIG) vacuum tubes (or lots of expensive special transistors) and a very strong power supply.
I mentioned lasers because light is a form of electromagnetic radiation, just like AC electricity and radio waves, and a laser is a kind of oscillator, but at much higher frequency than radio waves!
3. Yes but they are noisy and dangerous. Frequencies between 100 KHz - 1 MHz.
Thanks again. Referring back to no 1, it looks the way to go is oscillators. I actually dont want to use it for lighting or RF transmission, just a "pet" project that I have. It is my preference to work with the lowest amperages possible, but I may have to keep open the flexibility of using higher amperages if I dont get the results I want. So back to oscillators, ...where would you send me (links) to find some decent information regarding the type of, and best usage of oscillators Im looking for? Youve been alot of great information. Thanks!
Without knowing the following it would be difficult to give more advice...
1. Desired frequency range
2. Desired power output
3. Intended purpose.
4. Impedance of load.
If you want a power output of a few dozen watts, and if the frequency range was between (say) 50 Hz and 20 KHz and the impedance of the load was above about 5 ohms you could use a simple oscillator (such as a cheap 'signal generator') and feed the output to an audio amplifier, and connect the load in place of a loudspeaker... Much would depend on the nature of the load, whether it is a simple resistive load or if there is inductance and capacitance (ie reactance)...
You need to understand about impedance in AC circuits or you will burn up your amplifier!
The tendency is to generate the AC using a little low power circuit and then amplify it to obtain the power needed.
If you are talking about frequencies above about 20 KHz you are getting into (low) RF territory, and you need to be aware of maybe causing RF interference to nearby users of TVs, radio equipment etc. (You need to understand about harmonics). There are legal restrictions in most countries!!!
I forgot about modern electric railway trains. These tend to use AC motors. To vary the speed, the frequency of the AC supplied is varied by equipment often called a 'traction package'. The motors can have power ratings of 500 kW to over 1 MW. The Alstom Onix is a well known example. Also modern variable speed industrial electric motors eg in factories, steel rolling mills etc tend not to be DC anymore, and similar equipment is used. Sometimes called 'three phase drives'. They use insulated gate bipolar transistors, or IGBTs. (Google for all these things)
It seems to be, that a Tesla coil seems to satisfy the first half of my experiment requirement for obtaining a high voltage/high frequency field. I have made a Tesla coil with multiple Xformers in series from old microwave ovens, using a grounded Xformer of same for a Choke to create a load. Im using a 35k .03 mf capacator, and to the best I can figure, I am getting about 175k HZ output from the secondary. My question is,...if I use a 70K .01 mf capacator,...... that should triple my frequency and double my voltage? I am seeking about 300k Hz with at least 200k volts, amps are subsequential. (Contrex ..I hope you are still around )
You are on your own here. I know next to nothing about Tesla coils. I do know this however - you have described some apparatus, which, if you are not fantasizing, (I apologize if you are not) could very easily kill you and/or other people.
I cannot emphasise too strongly the importance of what I am about to write.
You should be thinking very carefully about safety, and also possible legal issues in your locality. You may get unwelcome attention from neighbours, police and fire departments. You could damage expensive electronic equipment belonging to you, your family or your neighbours. You may void insurance policies covering damage to your property, third-party liability and your home. It is safer if you do not work alone on HV equipment, and if you and your helper learn how to perform artificial respiration. I am serious here. Even one microwave oven transformer can kill you, let alone a streamer strike. A streamer is a conductor. If a streamer reaches you and touches an unshielded 120v or 220v live terminal on its way, (let alone a transformer secondary terminal!!!) that can kill you. Or your kid sister or your dog or a neighbour.
Tesla coils can cause burns, especially due to RF discharges from the secondary. Stay out of the immediate vicinity of a tesla coil. Remember, if you do get zapped by a large coil system, the heating effects may be mostly internal, causing lasting damage! Also remember that spark gaps and rotaries get hot and are a potential source of burns.
Marconi, a radio pioneer and contemporary of Tesla, said "I pray daily to God that I will not get deep burns"
You should seek help on a specialised Tesla coil forum like
Please! Be careful. If you are inexperienced enough to be posting in this forum here where we are, in the way that you are asking questions, I am fearful for your safety.
Thank you very much for your concern Contrex, your concern for my safety and the safety of others is truly admired. Yes, I know of the hazards, thats why when building this coil, I consulted with an experienced builder and even drove 6 hours to see him and his coil operate. The ground for the unit is no way connected to the house current nuetral, it has its own copper rod ground. I always ground out the discharge of the capacitor before leaving the unit. No one is allowed near the unit when it is operating. Thanks again for your concern.
Contrex i s right, you have to be very carefull with that what is not enough known.
I veryd interesting in Tesla, but I know, that all the photograps can be fotomontering.
The reason is the some like always, money.
Do not try to catch lightnings to the bottle like Beniamin Franklin.
I do not write this that I agree with the scientists, I really do not believe in the thermodynamical theories, because these are hypotheses, but rather to your safe doing dangerous experiments.
Good luck, and be carefully.
Sorry, my English is not good, but you understand what I wriet I think.
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