Thermosetting connection mode pneumatic solenoid valve coil FN09303-G

Definition of choke coil

Electro-magnetic coil for choke alternating current.

The use of coil reactance is directly proportional to frequency, which can restrain high-frequency communication current and let low-frequency and DC pass through. According to the frequency unevenness, air core, ferrite core and silicon steel sheet core are used. When used for rectification, it is called "filter choke"; It is called "audio choke" when it is used to throttle audio current; It is called "high-frequency choke" when it is used to restrain high-frequency current. The inductance coil used for "passing DC and blocking communication" is called low frequency choke, and the inductance coil used for "passing low frequency and blocking high frequency" is called high frequency choke. The principle of coil choke is simply that the magnetic field generated by the coil will obstruct the magnetic field generated by the current due to self-inductance during the current passing period, thus delaying the current passing. The "low-frequency choke coil" obstructs the communication electricity from passing because the delay time is shorter than the time required for the communication electricity to change direction. The delay time of "high-frequency choke coil" is less than the time required for low-frequency communication to change direction but greater than the time required for high-frequency communication to change direction, so low-frequency communication can pass but high-frequency communication cannot.

The effect of inductance, capacitance, and magnetic beads bridging between two grounds The inductance is bridged between two grounds, which usually has the effect of blocking different functions, such as the analog circuit is partially connected with the digital circuit, or the large current power ground is connected with the small signal control ground, and so on. The principle of blocking, simply put, is that it can restrain the mutual crosstalk of high-frequency disturbing signals and prevent the unexpected change of reference potential with different functions. However, inductance is usually not suitable, because of its distributed capacitance, it is more obvious at high frequency. The layout of magnetic beads is different from inductance, and there is no distributed capacitance. At low frequency, it is equivalent to short circuit, and at high frequency, it is equivalent to resistance. Energy is released in a thermal way, and the barrier effect is excellent.