The Tesla coil is also called the Tesla coil, because it is directly transliterated from the English name "Tesla". The Tesla coil consists of an induction coil, a transformer, a firearm, two large capacitors and a transformer with only a few turns of the primary coil. So how is the Tesla coil done? This article will give you a detailed introduction to the 12V ultra-simple Tesla coil production method tutorial for reference.
Tesla coil working principleThe Tesla coil principle is a device that uses a transformer to boost the normal voltage and then discharge it from the discharge terminal via a two-pole coil. The Tesla coil is coupled by two loops through the coil. First, the power supply charges the capacitor C1. When the voltage of the capacitor is high enough to exceed the threshold of the spark gap, the spark gap penetrates the air to ignite, the path of the primary coil of the transformer is formed, and the energy oscillates between the capacitor C1 and the primary coil L1. And passed through the coupling to the secondary coil. The secondary coil is also an inductor. The top cover C2 and the ground can be equivalent to a capacitor, so LC oscillation will also occur. When the two-stage oscillation frequency resonates, the energy of the primary circuit will surge to the secondary, and the voltage peak at the discharge end will continue to increase until discharge.
Production process of 12 volt ultra-easy Tesla coilMaterial preparation:
1. One high voltage package,
2. Diameter 0.25mm enameled wire 200m.
3. Diameter 2mm enameled wire three meters.
4. One diameter 12 cm metal ball
5. A diameter of 5 cm, a length of 30 cm PVC pipe, PVC is better, and plexiglass is the most ideal.
One 6.2N3055 triode.
7.240Ω 5W, 27Ω 1W resistors each.
8. Some insulation plates with a few millimeters thick.
One 9.12V battery.
10. There are several non-polar capacitors.
11. A bottle of glue
12. A few meters of diameter 1mm enameled wire.
Tools: electric hand drill, screwdriver, hand saw, pliers and other tools, ordinary screws, plastic screws, steel rulers, etc.
Ready to make:
1. Production of secondary coil: 0.25mm enameled wire is wound on the pipe. Note: the wire cannot be crossed, as shown in the figure.
2. Fabrication of the primary coil : The shape of the following figure is wound with a 2 mm enameled wire. Similar to a flattened spring. 7.5 cm in diameter, around seven turns.
3. Assemble the coil. Attach one end of the secondary coil to the metal ball. This ball, we call the discharge tip. It forms a capacitor with the ground. Then use a glue or a hot glue gun to fix the ball to one end of the tube.
The secondary coil is fixed to the plastic plate, the primary coil is fixed near the secondary coil, and the other end of the secondary coil is grounded.
4. Combine the capacitors. We need some non-polar capacitors, we recommend the use of polyester or ceramic capacitors. Based on the data from this coil, my calculations require a 21517pF capacitor. Hey, to do something so accurately, take 0.022μF (can be fine-tuned according to the spacing of the firearms).
The withstand voltage of the capacitor depends on the voltage of the power supply, and the high voltage package can generate a voltage of one to two thousand volts, so the higher the withstand voltage of the capacitor, the better. The calculation of the capacitance is very simple, here again, mention it.
The withstand voltage of the series capacitor is equal to the sum of the withstand voltages of the capacitors, and the reciprocal of the capacity is equal to the sum of the reciprocals of the capacities of the capacitors. The shunt capacitor has the same withstand voltage and the capacity is equal to the sum of the capacities of the capacitors. (When we combine capacitors, try to use the same kind of capacitors.) It is recommended to use 20kv 1000p capacitors in series and parallel 22 times to compare materials.
5. Making power
We can use a single tube self-excited push high pressure package to generate high pressure. We use a 2N3055 triode.
The black thing is the core of the high voltage package. The two coils wound around the ferrite were wound eight and twenty turns with a 1 mm enameled wire from the top to the bottom. The direction of the winding must be the same! It is best to install a heat sink for the triode, because the single tube will generate high temperature due to self-excitation, and it will not burn out the triode if the temperature is too high. The master can directly shed, and the rookie is still a practical and practical hole board... Use that 12V battery as its power source.
After connecting as shown, take the output of the high voltage package, that is, the thickest line and the row of pins on the high voltage package butt. Try to pull the arc to find the one with the longest arc and the other pins. They are sealed with insulating paint or hot glue guns. Then, the two lines on the right side of the figure are drawn.
Due to the time, I did not add a heat sink to it. Single-tube self-excitation is not efficient, and the heat is very large. If conditions permit, you can use circuits such as ZVS.
6. Making a firearm
The principle of SGTC is to charge the capacitor first. When the voltage of the capacitor reaches a certain level, the arc is discharged from the sparker to form a loop, then discharge, and then the cycle is restarted.
We can make a lighter with a slightly thicker enameled wire. In general, firearms cannot be used with sharp edges and require a smooth surface. The skin of one end of the two rough enameled wires is scraped off, bent into two smooth surfaces, and then fixed on the plastic plate with a hot glue gun, leaving a gap of 6-10 mm in the middle.
There are many ways to make a firearm. Since the one we made is low-power, there is no need to consider the problem of heat dissipation. The heat of the high-power coil is very powerful.
7. Final assembly analog circuit diagram
Since the operating frequency of the secondary LC loop can reach thousands of Hz, the high frequency power has a skin effect, that is, only flowing from the surface of the conductor, many people can touch the arc of the Tesla coil, which is not because they have special functions. The reason is that the high-frequency alternating current, if passed through the human body, will only pass from the surface of the skin, will not hurt the internal organs, so the safety of this coil is good, the production of this 12V ultra-simple Tesla coil is such a process.
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