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The definition of choke coil _ Inductance coil _ electromagnetic coil introduction

Choke circle
An electrical coil that resists alternating current. Using the coil reactance in direct proportion to the frequency, the high frequency communication current can be clamped to allow low frequency and direct current to pass. According to the frequency unevenness, an air core, a ferrite core, a silicon steel core, or the like is used. When used for rectification, it is called “filter choke”; it is called “acoustic choke” when used to clamp audio current; it is called “high frequency choke” when used to clamp high frequency current. Inductor coils for "DC, resistance communication" are called low-frequency chokes, and inductor coils for "passing low-frequency, high-frequency blocking" are called high-frequency chokes.
The principle of coil turbulence is simply that during the current passing period, the magnetic field generated by the coil will block the magnetic field generated by the current due to self-inductance, thereby delaying the current flow. The "low-frequency choke coil" obstructs communication and communication by the time required for the delay to be shorter than the time required for the communication to change direction. The time when the "high-frequency choke coil" is postponed is less than the time required for the low-frequency communication to change direction, but is greater than the time required for the high-frequency communication to change direction. Therefore, the low-frequency communication can pass and the high-frequency communication cannot pass.

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