Views: 2 Author: Site Editor Publish Time: 2022-10-18 Origin: Site
Inductor coil is divided into three uses: choke, filter, oscillation choke: in the low frequency circuit used to prevent low frequency alternating current, the pulsating DC into pure DC circuit; It is commonly used in rectifier circuit output filter capacitor in the middle of the two In high frequency circuit inductance coil to prevent high frequency current flow to the low frequency end filter: stop pulsating dc current flow to the pure dc after rectifying, use function and choke on dc capacitor charging and discharging, stop the alternating current (ac) feature to complete the smooth direct current and get the pure Oscillation: rectifier is to turn alternating current into direct current, then the oscillation is the reverse process of turning DC into alternating current. We call the circuit to complete this process the oscillator waveform: positive spin wave, sawtooth wave, trapezoidal wave, square wave, rectangular wave, spike wave frequency from a few HZ-tens of GHZ. In telegraphy, radio field application is very broad In the circuit, when current flows through a conductor, will produce electromagnetic fields, divided by the size of the current size of the electromagnetic field is inductive inductance is to measure the coil to generate electromagnetic induction ability of physical quantities to a coil, the current coil can produce a magnetic field around the coil magnetic flux through The larger the power supply into the coil, the stronger the magnetic field and the greater the magnetic flux through the coil. Experiments have proved that the magnetic flux through the coil is proportional to the current in, and their ratio is called the self-inductance coefficient, also known as the inductance Inductance CAN only act on unstable currents, and its characteristic is that the voltage at both ends is proportional to the instantaneous rate of change (derivative) of the current passing through it, and the coefficient of proportionality is its self-inductance Inductance is the cause of it at the time of steady current through the change of magnetic field, and will in turn affect the current and the magnetic field, so, so, any conductor, as long as the steady current through it, can produce a change of magnetic field, will in turn affect current, so any conductor will have self-induction phenomenon On the motherboard can see a lot of copper wire winding coil, the coil inductance and inductance is mainly divided into core inductance and hollow inductors, magnetic core inductance inductance used in filter circuit, the hollow inductive inductance is small, often used in high frequency characteristics of the circuit inductance and capacitance on the contrary, it has to stop the characteristics of alternating current through the dc pass The characteristics of the inductor is DC resistance AC, the higher the frequency, the greater the coil impedance inductor often works with the capacitor in the circuit, forming LC filter LC oscillator, etc. In addition, people also make use of the characteristics of the inductor, transformer relay and so on.