First use the transformer to boost the voltage, and then charge the primary circuit capacitor. When the charge reaches the discharge threshold, the spark gap discharge conducts, and the primary circuit generates electromagnetic oscillation, providing sufficiently high excitation power to the secondary coil.
Since the natural frequencies of the primary coil and the secondary coil are set equal, electromagnetic vibration can occur, and the secondary coil can accumulate extremely high voltage. When the voltage can penetrate the air, artificial vibration can be seen. lightning.
Extended information
The inventor of the Tesla coil is a scientist named Nikola Tesla. He is the greatest inventor, physicist, and mechanic in the world. Engineer and one of the electrical engineers. Of Serbian descent, he was born in Croatia (later incorporated into the Austrian Empire). Tesla is considered an important inventor in history.
He is also famous for his contributions to electricity and magnetism in the late 19th and early 20th centuries. His patents and theoretical work on modern alternating current electrical (AC) systems, including polyphase power distribution systems and AC motors, helped usher in the Second Industrial Revolution.
Baidu Encyclopedia-Tesla Coil