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English: Circuit diagram of a modern unipolar W:Tesla coil, a spark-excited resonant transformer circuit which produces high frequency high voltage alternating current at low current levels. It was invented by Serbian-American inventor Nikola Tesla in 1891.
In the majority of Tesla's experiments, he used machinery of his own design to produce the Tesla effect. These early coils would use the "disruptive" action of a spark gap in their operation. The setup can be duplicated by a Ruhmkorff coil, two condensers (now called capacitors), and a second, specially constructed, disruptive coil.
This is a modern unipolar version of the circuit used for entertainment coils, in which one side of the secondary is grounded and the other side is connected to a toroidal-shaped capacitive high voltage terminal. A slightly different form of the circuit, with the positions of the capacitor and spark gap exchanged, is found at Tesla coil 3.svg
This is a modern unipolar version commonly used in entertainment coils, with a toroidal-shaped metal capacitive load E on the high voltage terminal. The primary circuit is shown connected to the primary winding L1 with a variable tap, so that the primary and secondary coils can be adjusted to resonance.
The extra coil or helical resonator can be physically separated from the two close-coupled coils which comprise the master oscillator or driver section. The power from the master oscillator is fed to the lower end of the extra coil resonator through a large diameter electrical conductor or pipe to minimize corona.
Kevin Mazur/MG22/Getty; 101 Studios / courtesy Everett Collection. Elon Musk at the 2022 Met Gala on May 2, 2022 in New York City; Nicholas Hoult as Nikola Tesla in 'The Current War'
A Tesla coil is an electrical resonant transformer circuit designed by inventor Nikola Tesla in 1891. [1] It is used to produce high-voltage, low-current, high-frequency alternating-current electricity. [2] [3] Tesla experimented with a number of different configurations consisting of two, or sometimes three, coupled resonant electric circuits.
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