Application range and adjustment method of adjustable inductor
Jan 14, 2020
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1. Oscillation coil for semiconductor radio This oscillation coil and the variable capacitor in the semiconductor radio constitute a local oscillator circuit, which is used to generate a local oscillator signal higher than the 465kHz signal received by the input tuning circuit.
2. Line Oscillation Coil for Television Line oscillation coils were used in early black and white televisions. They formed self-excited oscillation circuits (three-point oscillators or intermittent oscillators, multivibrators) with external capacitors and capacitors, etc. It is used to generate a rectangular pulse voltage signal with a frequency of 15625HZ. The core of this coil has a square hole in the center. The line synchronization adjustment knob is directly inserted into the square hole. Turning the line synchronization adjustment knob can change the relative distance between the core and the coil, thereby changing the inductance of the coil and maintaining the line oscillation frequency. It is 15625HZ, and it generates synchronous oscillation with the line synchronization pulse sent by the automatic frequency control circuit (AFC).
3． Linear Linear Coil Linear Linear Coil is a kind of non-linear magnetic saturation inductance coil (its inductance decreases with the increase of current), it is generally connected in series in the line of the deflection coil, and uses its magnetic saturation characteristics to compensate the linearity of the image distortion.
2. Line Oscillation Coil for Television Line oscillation coils were used in early black and white televisions. They formed self-excited oscillation circuits (three-point oscillators or intermittent oscillators, multivibrators) with external capacitors and capacitors, etc. It is used to generate a rectangular pulse voltage signal with a frequency of 15625HZ. The core of this coil has a square hole in the center. The line synchronization adjustment knob is directly inserted into the square hole. Turning the line synchronization adjustment knob can change the relative distance between the core and the coil, thereby changing the inductance of the coil and maintaining the line oscillation frequency. It is 15625HZ, and it generates synchronous oscillation with the line synchronization pulse sent by the automatic frequency control circuit (AFC).
3． Linear Linear Coil Linear Linear Coil is a kind of non-linear magnetic saturation inductance coil (its inductance decreases with the increase of current), it is generally connected in series in the line of the deflection coil, and uses its magnetic saturation characteristics to compensate the linearity of the image distortion.
Adjustment method:
1. The method is to use a soft ferrite with a thread to change the position of the core in the coil;
2. Use a slide switch to change the number of coil turns, thereby changing the inductance of the inductor. The disadvantage of these two methods is that there are moving parts, which can only be adjusted manually, but not automatically controlled. In the specific power supply equipment, the combination of the core and the line is used to change the inductance of the inductor. There are three methods.
1. The method is to use a soft ferrite with a thread to change the position of the core in the coil;
2. Use a slide switch to change the number of coil turns, thereby changing the inductance of the inductor. The disadvantage of these two methods is that there are moving parts, which can only be adjusted manually, but not automatically controlled. In the specific power supply equipment, the combination of the core and the line is used to change the inductance of the inductor. There are three methods.
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