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Inductance coil
Inductance coil
1, single coil
Single coil is a circle around the enclosure to get a paper or bakelite skeleton insulated wire. Medium wave antenna coil.
2, honeycomb coil
If the coil is wound, the plane is not parallel to the plane of rotation, but to a certain angle. The rotation of a week, the number of times the wire back and forth, often known as the fold points. The advantages of this method are small size, small distribution capacitance and large inductance. Honeycomb coil is wound around the winding machine, the more points, the smaller the distribution capacitance
3, ferrite core and iron core coil
The inductance of the coil is related to the magnetic core. The ferrite core is inserted in the air core coil, which can increase the inductance and improve the quality of the coil.
4, copper core coil
Copper core coil in ultrashort wave range is widely applied to change the inductance using the copper core coil position, this adjustment is convenient and durable.
5, color code inductor
Is the color code inductor inductor with fixed inductance, the inductance of the same sign as to the color ring resistance method to mark.
6, small fixed inductors
A small fixed inductor is usually wrapped in core winding directly into line with paint, mainly used in filtering, oscillation, notch and delay circuit, it is sealed and non sealed two package form, two form has two kinds of vertical and horizontal structure.
1 vertical sealing fixed inductors vertical sealing fixed inductors using the same type of domestic to pin inductance range 0.1~2200 H (direct scale on the shell), rated current is 0.05~1.6A, the error range is 5%~ + 10%, inductance of imports, the amount of current larger, smaller error. Import TDK series color dot color code inductor, the inductor surface with its inductance.
2 horizontal seal fixed inductor horizontal seal fixed inductors using axial pin, made with LG1.LGA, LGX series.
LG1 series inductor inductance range of 0.1~22000 H (straight on the shell), rated operating current of 0.05~1.6A, the error range of + 5%~ + 10%.
LGA series inductors using ultra small structure, shape and 1/2W color ring resistor similar to the inductance of the range of 0.22~100 H (with color ring on the shell), the rated current of 0.09~0.4A.
LGX series color code inductor also for small package structure, its inductance range is 0.1~10000 ~ H, rated current is divided into 50mA, 150mA, 300mA and 1.6A four specifications.
7, adjustable inductor
The commonly used adjustable inductor is the oscillating coil of the semiconductor radio, the row oscillating coil of the television, the line linear coil, the intermediate frequency notch coil, the frequency compensation coil for the audio, the choke coil, etc..
Adjustable inductor
1). Radio oscillation coil of the oscillation coil in semiconductor receivers with variable capacitor composed of the oscillator circuit, for generating a radio signal input circuit receives the high tuning out of the vibration signal 465kHz. The utility model is characterized in that the inner part of the utility model is provided with a metal shielding cover, and the inner part of the utility model is composed of a nylon lining frame, a I-shaped magnetic core, a magnetic cap and a pin seat. Magnetic cap onto Nylon frame shield on the inside, can spin rotation, by changing the inductance coil and its distance to change the coil. The internal structure of the intermediate frequency notch coil of the TV is similar to that of the oscillating coil, but the magnetic cap can be adjusted.
2). TV with line oscillation coil row oscillation coil used in the early black and white TV, with the external resistance capacitance element and an oscillation transistor composed of a self-excited oscillation circuit (three point oscillator or intermittent oscillator, multivibrator), used to generate frequency pulse voltage signal for the rectangular 15625HZ. The core center square hole of the coil, synchronous adjustment knob is directly inserted into the square hole, the adjusting knob for synchronous rotation, can change the relative distance between the magnetic core and the coil, thereby changing the inductance coil, make oscillation frequency to keep 15625HZ and automatic frequency control circuit (AFC) generates synchronous oscillation of synchronous pulse into the line.
3). Linear coil linear coil is a nonlinear magnetic saturation inductance coil (the inductance decreases with the increase of current), its general series line deflection coil circuit, linear distortion with the magnetic saturation characteristics to compensate the image.
A linear coil is winded on the package of the H-shaped ferrite core or high-frequency ferrite rod on line paint, coil is arranged near the permanent magnet adjustable. By changing the relative position of the permanent magnet and the coil, the inductance of the coil is changed, so as to achieve the purpose of linear compensation.
8, deflection coil
Deflection coil is the output of TV scanning circuit load, deflection coil requirements: high deflection sensitivity, uniform magnetic field, high Q value, small size, low price.
The deflection coil is a subsidiary part of the television picture tube, which comprises a deflection coil and a field deflection coil, which are sheathed on the tube neck (cone part) of the kinescope to control the scanning direction of the electron beam. The deflection coil controls the electron beam to scan horizontally, and the field deflection coil controls the electron beam to scan in a vertical direction.
9, choke inductor
The choke inductor is a kind of inductance coil which is used to block the AC current path in the circuit.
1 high frequency choke coil
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