The color code inductor

The colour code inductance is similar to the colour ring resistance. Different colours are used to represent different numbers, which can indicate the inductance of the inductance.

Some inductances are directly labeled on the inductance package; others need to be measured by a meter.

The color code inductor, also known as the color ring inductor, is a component utilizing self-inductance. Self-induction is a special manifestation of electromagnetic induction, which was first discovered by Faraday in 1835. The color ring inductor has important application in radio technology and other production technology. In the circuit, the inductance coil (color ring inductance) often together with the capacitor constitutes the resonant circuit, filter circuit, etc. Because the working frequency band is very different, so the number of coils and the skeleton material of inductance coil are also very different. The inductance coil suitable for power filter is generally wound on the iron core made of silicon steel sheet, and its shape is very similar to that of transformer. The inductance L of the colour ring inductance is also called self-inductance or self-inductance coefficient. Inductance is a physical quantity which indicates the ability of inductance coil to produce electromagnetic induction. The unit of inductance of the color ring is UH. This is a commonly used color ring inductance, but also more commonly used. The unit of inductance is: mH, H. The calculation of the color ring inductance is: 1H = 1000MH, 1MH = 1000UH. The basic principle of the color ring inductor is charging and discharging, of course, rectification, oscillation and other functions. Colour ring inductor is generally used for circuit matching and signal quality control. Generally speaking, it is also a kind of energy storage element.

Classification:

1. Classification of inductors: The commonly used inductors are fixed inductors, fine-tuning inductors, color-coded inductors, etc. Transformers, choke coils, oscillating coils, deflection coils, antenna coils, mid-cycle, relays, delayers and magnetic heads are all types of transmission inductors.

2. Main Technical Indicators of Inductors

Inductance: L

3. The marking method of inductor:

A. Index method.

B. Digital representation.

C. Color code representation. This representation is also similar to the resistor color labeling method. The color codes generally have four colors. The first two colors are valid numbers, the third color is multiplier, the unit is uH, and the fourth color is error bit.

The inductance can be seen by multiplying the effective number by the second percentage.

Effect:

There are some knowledge about color ring inductance: when the current passed by the color ring inductance is used in the circuit, only a fixed magnetic field line appears around the inductance; but when the color ring inductance passes through the AC current in the coil, the magnetic field line around the color ring inductance will change with time. It can be seen that the inductance of the color ring inductance is only a parameter related to the number, size, shape and medium of the coil. It is a measure of the inertia of the inductance coil and has nothing to do with the applied current.

When the color ring inductor forms a closed loop, the inductive potential will generate the inductive current. Color ring inductance is similar to inertia in mechanics. In electronic components named "inductor", sparks usually occur at the moment when the switch is opened or the switch is turned on. This phenomenon of self-inductance produces a high inductive potential. The change of the color loop inductance comes from the change of the external alternating power supply. Therefore, from the objective effect, the color loop inductance has the characteristic of preventing the change of the current in the alternating current circuit. In short, when the color loop inductor is connected to the AC power supply, the magnetic force line inside the color loop inductor will change with the alternation of the current at all times, resulting in the electromagnetic induction of the color loop inductor. The electromotive force produced by the change of the current of the inductor itself is called the color ring inductor.

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