My first experiments on the creation of Tesla coils, probably like all creators of Tesla coils, was, to put it mildly, unfortunate ... Something constantly, break something, or closed, or basking or just burns, sometimes with fireworks. .. And this is all despite the fact that I'm pretty well know theoretical physics, electrical and electronics. But a bad experience, he then bad that I get something that will not give probably no theory. And with me, I think, everyone will agree. This - the sixth sense ;-) theory theory and experience - quite a different matter. And, as a result of my experiments that show here, probably does not make sense, it was born last, the first coil is working perfectly:
At its core - is symmetric Tesla coil. Tesla or without grounding. By the way, I and all the rest of his Tesla coil is also designed without grounding, in the usual sense of the word. The fact that the normal ground under the old panel houses 80s, more simply, "brezhnevok" impossible. It is necessary to earth ground the house to attach the coil. How to join her if ground as such has long rotted. And electricians, serving home, spit on this issue by attaching a ground zero power. You understand what this means. On the ground installed pipe coils - also not an option. Kill the neighbor can instantly. Especially when he climbs into the tub. And this time I'll turn coil. In addition, the plastic pipe is now! The current goes through the water. With all the consequences .... I nekotoorye wrote: tie ground to a gas pipe ... You can not in any case !!! My first design Tesla coil was completely ungrounded. I put in the middle of the primary winding and a secondary winding its ends are connected by the spark gap, you see. Everything. For the first time I had enough of this euphoria.
I snatched up transformer from an old, still Soviet, microwave. Chinese MOTs absolutely not good! One, well, not too much! This gives MOT output of about 2 kilovolts. And warm at idle, well, just very much! A minimum of three are required, connected in series and in parallel secondary windings primary windings of the Chinese MOTs. Even at idle, such a construction consumes 800 watts idle one MOT * 3 = 2.4 watt idle! And the isolation of the secondary windings of each MOT can not withstand the amount of voltage (6 kV) and burns immediately. Even immersing them in a container with insulating oil does not give any effect due to the very dense winding up transformers these windings. The oil does not penetrate inside even. And it can only serve as a cooler. Therefore, my choice, and fell on the Soviet-up transformer. And the more powerful magnetic and he is more the size of the secondary winding and rewinding is very simple, a lot of places. Could do with a stock in Russia! I got 7.2 kilovolts. Mota, not raschityvaya until enough space for winding wire diameter 0.34 mm. A very respectable output voltage! Since it is already possible to work. This picture is not rewound Soviet MOT:
gap I decided to make static. To find on the basis of a large automotive bearings. Autogenous cutting it took balls and set them side by side, with the ability to adjust the spark gap. Thus the gap successfully lived up to my next constructions. About it on. And yet - the first pictures of my coil.
And of course, video
Thus, increasing the experience on the ground is my, successful design and realizing that when such a good MOT I get a suspiciously low result, I began to think further. And I get something more interesting already. Video posted immediately. I think it will be interesting to you. In addition, a video has explanatory titers. By the way, the lower end of the secondary, I'm stuck in the ground, because their experience videotaped, I spent at the villa. And provided ground without problems.
Of course, this is not the desired result ... But this is my first successful and promising design. And subsequent experiments and the results were not slow to affect the constructions Tesla coils. Take a look:
Briefly about the design. The power supply, which in a box at the bottom of the coil is made up of sheets of particle board. Inside - my good old rewind to 7 kilovolts Soviet MOT, from the Soviet microwave. Spark gaps are all the same balls of the bearing. They have shown themselves perfectly. Capacitor - battery high-voltage capacitors from Chinese microwaves, connected in series-parallel. Four high-frequency choke on gray PVC sewer pipes with coiled wire SEW-0.34, 550 turns each. Are connected by two sequentially in each line. Total - four turns. The primary organization kontura- flat 7 turns of copper tube 8 mm in diameter, raised by some distance the height of the secondary, for a better relationship. But it's dangerous, so the entire bottom of the secondary, I wrapped lenoleumom transparent, so God forbid do not try. As, however, and all of the secondary. But the bottom - a little more wound. Sama resale - 3,000 turns of wire SEW-0.34. Someone might say, too much ... maybe. But - works, as you can see. And not bad! Now toroid. I carried it out, I think, is original. Anyway, I have none of this design have not seen yet, but through the entire Internet. I took the car camera at 13. pouted pump up the elastic state, but not until it begins to swell hernias, losing shape. Clung to its aluminum tape, smoothing Lyapkov glass smooth glass to be seen less wrinkling. And be joined by the same aluminum tape knitting needle, arching its circuit cameras and tilting the other end horizontally. The result was a cool terminal. The high voltage applied to the coil toroid see the entire whole, and not individual Lyapkov tape. For two million volts Scotch adhesive substance is absolutely transparent. So I get the perfect donut. This is not from the corrugation of ventilation that's just the slightest drop bends, Promin most unsightly manner so that his mount after such a fatal fall on the floor, back to the coil, somehow ... unpresentable, something ... And this pasted aluminum scotch car camera (in my case, there are two glued together) you can at least kick, like a ball, she Nichrome did not! It will just spring out. And finally: Ground. Once again, I was able to do without the traditional ground pipe or cable in the ground vkopyvat ... I just bought a hardware store in a metal grid in a few square meters and spread it on the floor, connect it to the lower pole of the coil. It turned out perfect psevdozazemlenie. It works perfectly and no one traumatic. and do not kill. Starting, as you can see, the house produced. With the use of high-frequency filters on nutrition. Always! And electrical power was enough for such a facility. The trick - to change the cosine of the angle "phi". This is where, in the pulse unit (welding transformer or Tesla coil) current consumption lags behind the voltage. Learn more - read the electrical literature. Well, so that's like and all of this coil ...
Almost ready is the second (the fourth in a row) coil. It is more powerful. Soon the video will show. Here her pictures, though that has not run. Designing it has already been a lot easier on the known path
As you can see, it is already assembled and almost ready to go. But ... I run it in the apartment I'm afraid. I bought an old transformer for welding. I stripped him of his old wound coil and the new winding. It received nearly 13 kilovolts. Almost twice as much than previous such constructions, I showed earlier. And how will the terminal in general is hard to say .. but not less than 3 megavolt, for sure! Long streamers will. Therefore, I am afraid. That summer waiting to take her to the nature and turn it. Now only pictures of the manufacturing process:
By reviewing a large amount of material and photos and videos in the net for the construction of Tesla coils, and realizing that you can many components and details done differently, more effectively, and not as the others, I went into innovation. He started with the secondary. I wrapped her in the white PVC The 16-centimeter diameter, pipe ventilation. It is certainly nice and smooth ... Only with weak electrical performance. Why, many designers coils, use such a framework to wind its vtorichek often had to change them because of their rapid failure. Makes its way into the coil from the top down! And such a framework has been good for nothing. I went the other way. I took and increased insulating properties frame, making it three-layer. Two layers - outer and inner - two tubes inserted into one another. A space between Shots thin felt and soaked it with transformer oil. Next - high filters, so-called high-frequency channels. Their unusual and should be one per channel. And put it after a high-voltage transformer. But here's the rub: the interior of the box is very limited. Then, I simply divided into two two filters. It turned out four filters. Two per channel. Wound them into the box from the sanitary sealant, which can be found on almost any landfill, because many are engaged in home construction and to find used four tubes of sealant, I think working for anybody not reach. However, the need still fifth tube. Her I used to accommodate the four ring cores and four capacitors. I get a block attached to the power supply wire near the plug. It will protect the grid from the harmonics, penetrating the food chain, and from there, into the general grid. Without this assembly, the grid will be a lot of noise during operation of the coil and various home appliances at home can burn. Further - primary resonant circuit capacitor. On it, I decided not to save and forked into three pulsed high-voltage capacitors of 1 uF 10 kV and 8 thousand rubles each. What to do? All the same, the battery of capacitors assembled from the capacitor for the microwave, on 1mkF of 2kV each, and often did not maintain its capacitors exploded, they are not intended for use in switching devices, AC. And only the DC voltage. Of course, the absence of money, and you can take advantage of them, as I have in previous designs. But if you can, it is better to buy a good capacitors. And of course, shunt resistors 2 - 3 megohms everyone to turn off after a coil, capacitors have the opportunity to be discharged. If a capacitor and constantly closed on the primary circuit, it is possible and without the resistor. But if they are - a chain, their presence - always. Now - about iskrovike. Iskrovik .... a lot of talk in the net about how best to use. Rotating iskrovik, if properly set up, able to raise the energy of the coil by 20 - 30%. But to make it ... It is necessary to try! All contacts should, with rotation of the disc, to be perfectly identical spark gaps, or in packets of pulses will be significant omissions. And energetic, you will not get. And the speed of the disk diameter, as well as the number of pins on the drive, and often their mutual arrangement, have carefully calculated and adjusted to match the rate of charging and discharging the capacitor bank of the primary resonant circuit which, incidentally, also depends on such factors, for example, as the thickness of the conductors of the terminals themselves to the inner plates of the capacitor. One More hemorrhagic! Many simply poke bolts on the drive and run it on a simple induction motor. It is fundamentally wrong! In view of the foregoing, it is easier to do a static arrester. And customized distance single spark gap - between the only two spark contacts. Well, anyway, the coil energy in general, will be slightly smaller because of the limited number of packages pulse discharges. But, by the way, it often does not matter, since the resonance system itself limited by the speed zarayada discharge capacitor. What does it depend on? Above all, from the number of capacitors in the battery. What are fewer of these capacitors in the battery - the better capacitor will be charged. Few energy depends on the distance between the capacitor plates and the quality dielektrika between them. In short, my personal opinion: a rotary gap - just a show-off sloppy. Or employment for hard-nosed. I myself could not properly raise this gap, because it could not find the motor, without longitudinal play of the shaft. I decided to give it up, using static contacts. But there is one downside, and in them. It's a crazy their heating during operation. However, plasma ... And when red-hot between white-hot contacts an arc - Kick! There is no work! Therefore, our task - such contacts rapidly cooled. But this is still not enough. Doug occurs more rapidly, the worse the heat conductivity spark contacts. That is, the slower they transfer heat from the place of occurrence of sparks, the faster it will heat up the place. And the faster the arc occurs. In this case, some mechanisms help arcing. There are several ways to extinguish the arc. You can contact iskrovika immersed in transformer oil. But though it has the necessary cooling and thermal conductivity, yet difficult sparks because of its insulating properties. It's all the same - transformer oil! The second way - to use the maximum possible by the massive contacts. These may be just a ball bearing. Not bad, in my opinion the decision. There is another good way to extinguish the arc. This - the intensity and direction of air flow, which is quite effective and blows the arc contacts and more contacts and cooled discharger. Here are the last two at once, and I took in his earliest designs. And, it seems, use, and in this design too. Personally, I liked the decision a difficult problem. On the other nodes Tesla coil, I think it makes no sense to tell, as they podrobnenko chewed on other resources such direction and content. That's it .... perhaps the most important thing, I believe, do not be afraid trivial approach to problem solving. And all will turn out.