Tesla coil is also called Tesla coil because it is directly transliterated from the English name "Tesla". This is a distributed parameter high-frequency series resonant transformer that can obtain high-frequency voltages of millions of volts. The principle of the traditional Tesla coil is to use a transformer to boost the ordinary voltage, and then charge the resonant capacitor of the primary LC circuit. When it is charged to the discharge threshold, the spark gap discharge conducts, and the primary LC circuit resonates in series, providing sufficient power to the secondary coil. The high excitation power is equal to the frequency of the secondary LC circuit, causing the inductance and distributed capacitance of the secondary coil to resonate in series. At this time, the discharge terminal voltage is the highest, and lightning is seen. In layman's terms, it is an artificial lightning maker. ?There are Tesla coil enthusiasts all over the world. They have made various devices and created dazzling artificial lightning, which is very beautiful.
Classification
SGTC (Spark? Gap? Tesla? Coil) = spark gap Tesla coil
Invented by Mr. Nikola Tesla himself at that time The "Tesla coil" belongs to SGTC. Because the structure and principle are relatively simple, it is also suitable for beginners to get started with Tesla coils at this stage.
SISGTC (Sidac-IGBT?SGTC) = trigger diode Tesla coil
A circuit group composed of trigger diodes-IGBT tubes replaces the traditional spark gap to eliminate sparking noise purpose.
SSTC (Solid?State?Tesla?Coil)=Solid State Tesla Coil
To put it more simply, it is a single-resonance electronic switch Tesla coil. The primary does not produce series resonance. Only the frequency that can satisfy the secondary LC series resonance is provided to the secondary, so that the secondary coil can achieve series resonance. The primary current is the excitation source voltage divided by the AC impedance.
Advantages: It has the characteristics of low noise, high efficiency and long life, so it has been well developed.
Disadvantages: The primary coil provides limited excitation power to the secondary coil, and the arc is not long.
ISSTC (Interrupted? SSTC)=Solid-state Tesla coil with arc extinguishing
Under the same output power, the arcs of SSTC are clustered and are obviously not as spectacular as SGTC. At this time, an arc extinguisher can be added to imitate the work of SGTC. The arc can be longer, and the audio signal arc extinguishing signal can also be used to play music.
DRSSTC (Dual?Resonant?SSTC)=Dual Resonant Tesla Coil
DRSSTC is essentially a series resonant inverter. Compared with SSTC, due to the primary coil In series resonance, the voltage across the primary coil inductor is Q times the excitation source voltage, and the resonant impedance Z (R) factor is very low, so the primary resonant current is very large (the resonant voltage divided by the resonant impedance equals the resonant current). At this time, the The excitation power provided by the stage will also be very large, which is not the same order of magnitude as SSTC. Compared with SSTC, the primary coil of SSTC cannot provide sufficient excitation power to the secondary coil, so the lightning generated by SSTC is not as spectacular as the spark gap Tesla coil of the same power level.
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The primary coil of DRSSTC not only meets the conditions for series resonance of the inductance and distributed capacitance of the secondary coil, but can also provide sufficient excitation power to the secondary coil, so The arc length of DRSSTC will be very long.
Advantages: Compared with SGTC, there is no sound and light pollution from the spark gap, strong controllability, music playback, high efficiency and long life.
QCWDRSSTC(Quasi?Continuous?Wave?DRSSTC)=Quasi-continuous wave dual-resonance solid-state Tesla coil
CWDRSSTC(Continuous?Wave?DRSSTC)=Continuous-wave dual-resonance solid-state special coil Tesla
Experiments have proven that if the power of the continuous mode (CW) Tesla coil is exerted without time limit, the arc is not long and is in the shape of a cluster.
VTTC (Vacuum?Tube?Tesla?Coil)=vacuum tube Tesla coil
When electron tubes gradually faded from our sight, a group of tube enthusiasts used them to make VTTC.
The electronic tube itself has advantages such as good high-frequency performance, so the VTTC effect produced is very unique. However, it is undeniable that the electronic tube itself has shortcomings such as high cost, low lifespan, low efficiency, serious heat generation, and easy damage. VTTC has not been widely popular.
The basic principle is similar to the self-excitation of a transistor.
SSVC(Solid?State?Valve?Coil)=Solid State-Vacuum Tube Tesla Coil
OLTC(Off?Line?Tesla?coil)=Offline Tesla Coil< /p>
When we remove the SGTC lighter, replace it with a MOSFET or IGBT, and use a diode to connect the D and S poles in reverse parallel (if it is an IGBT, it is the C pole and E pole) ), and use a solid-state circuit to control the switching tube, and then add a low-voltage driver to become an OLTC.
Its essential principle is still LC oscillation, and it is almost the same as SGTC. The difference is that the lighter is replaced by a solid-state switch and a low-voltage driver is used. There aren't many differences elsewhere.
Because it is driven by a low voltage and cannot generate too much current, the arc of OLTC is not as spectacular as that of SGTC.
Details
The Tesla coil is composed of an induction coil, a transformer, a lighter, two large capacitors and a transformer with only a few turns of the primary coil.
Introduction
In 2007, there was an article introducing Tesla coils: "Close Contact with the "Hand of Death"? Artificial Lightning Made at Home". It briefly introduces the general components and principles of Tesla coils.
Tesla Coil is a transformer (vibration transformer) that operates on the principle of oscillation. It was invented by Nikola Tesla, a Serbian-American scientist. Invented in 1891, it is mainly used to produce ultra-high voltage but low current and high frequency AC power. A Tesla coil consists of two (sometimes three) groups of coupled oscillation circuits. The Tesla Coil is difficult to define, and Nikola Tesla experimented with a large number of various coil configurations. Tesla used these coils to conduct innovative experiments such as electrical lighting, fluorescence spectroscopy, X-rays, high-frequency alternating current phenomena, electrotherapy and wireless power transmission, transmitting and receiving radio electrical signals.
Principle
The principle is to use a transformer to boost ordinary voltage, and then discharge the voltage from the discharge terminal through the two-pole coil. A Tesla coil consists of two loops coupled through the coil. First, the power supply charges the capacitor C1. When the voltage of the capacitor reaches a certain level and exceeds the threshold of the ignition gap, the ignition gap breaks down the air and ignites. 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 is transmitted to the secondary coil through coupling. The secondary coil is also an inductor, which can be equivalent to a capacitor between the top cover C2 and the ground, so LC? oscillation will also occur. When the two-stage oscillation frequency resonates at the same frequency, the energy in the primary circuit will surge into the secondary circuit, and the voltage peak at the discharge end will continue to increase until discharge.
The uses of Tesla coils
Tesla coils are not only used in games or art, but more valuable is that they have significant uses, such as using Tesla Pull coils can realize wireless transmission of electric energy, and this method has high transmission efficiency and is less ecologically destructive. However, there are still many difficulties and obstacles in practical application, and it cannot be applied to actual power transmission. Lightning is an atmospheric discharge phenomenon. When lightning occurs, it releases huge energy, with a voltage as high as millions of volts and an average current of about 2×105A. It is estimated that the earth is struck by lightning 45 times per second. The energy generated by a lightning strike is enough to drive an ordinary car about 290 to 1,450 kilometers, which is equivalent to the energy generated by 30 to 144L of gasoline. However, it is quite difficult to utilize lightning. This is because lightning occurs for as short as tens of milliseconds and is difficult to capture. The Tesla coil is one of the possible tools for capturing lightning.