CABLOFIL electrical components Germany CABLOFIL model CABLOFIL price

CABLOFIL electrical component is a pyroelectric infrared sensor, a device composed of thermocouples. It is widely used as a temperature detection device in fields such as ear thermometers, radiation thermometers, electric ovens, and food temperature detection. The entry details the basic unit of a thermopile—the thermocouple; and provides a detailed introduction to the structure, working principle, main parameters, and applications of thermopiles.

CABLOFIL electrical component structure

Inductors are generally composed of bobbins, windings, shielding cans, encapsulation materials, magnetic cores, or iron cores. 1, bobbin A bobbin refers to the support for winding coils. For some larger fixed inductors or adjustable inductors (such as oscillator coils, choke coils, etc.), enameled wire (or silk-covered wire) is mostly wound around the bobbin, and then a magnetic core, copper core, or iron core is inserted into the inner cavity of the bobbin to increase its inductance. Bobbins are usually made of plastic, bakelite, or ceramic, and can be made into different shapes according to actual needs. Small inductors (such as color-coded inductors) generally do not use bobbins, but directly wind enameled wire around the magnetic core. Air-core inductors (also known as former-less coils or air coils, mostly used in high-frequency circuits) do not use magnetic cores, bobbins, or shielding cans; instead, they are wound on a mold first, then the mold is removed, and a certain distance is maintained between the turns of the coil. 2, winding A winding refers to a set of coils with specified functions, which is the basic component of an inductor. Windings are divided into single-layer and multi-layer types. Single-layer windings have two forms: close-wound (wires are wound circle by circle) and spaced-wound (a certain distance is kept between each turn of wire); multi-layer windings include layered flat winding, random winding, honeycomb winding, and other methods. 3, magnetic core and magnetic rod Magnetic cores and magnetic rods are generally made of materials such as nickel-zinc ferrite or manganese-zinc ferrite, and come in various shapes such as "I" shape, cylindrical, cap shape, "E" shape, and pot shape. 4, iron core Iron core materials mainly include silicon steel sheets, permalloy, etc., and their shape is mostly "E" type. 5, shielding can To prevent the magnetic field generated by some inductors during operation from affecting the normal operation of other circuits and components, a metal shielding can is added (such as the oscillator coil of a semiconductor radio). Inductors with shielding cans will increase coil loss, reducing the Q value. 14, encapsulation material Some inductors (such as color-coded inductors, color-ring inductors, etc.) are sealed with encapsulation material after winding, enclosing the coil and magnetic core. Encapsulation materials include plastic or epoxy resin.

CABLOFIL electrical component applications

Wire and cable products used in power systems mainly include overhead bare wires, busbars (busbars), power cables (plastic cables, oil-paper power cables (basically replaced by plastic power cables), rubber-sheathed cables, overhead insulated cables), branch cables (replacing some busbars), magnet wires, and electrical equipment wires and cables for power equipment. Wire and cable products used in information transmission systems mainly include telephone cables, TV cables, electronic cables, RF cables, fiber optic cables, data cables, magnet wires, power communication cables, or other composite cables. Except for overhead bare wires, almost all other products in this category are applied, but mainly power cables, magnet wires, data cables, and instrument cables.

CABLOFIL electrical component principle

Bipolar junction transistors are divided into two types based on material: germanium transistors and silicon transistors. Each type has two structural forms: NPN and PNP. However, the most commonly used are silicon NPN and germanium PNP transistors. (Among them, N means negative pole; N-type semiconductor is formed by adding phosphorus to high-purity silicon to replace some silicon atoms, generating free electrons for conduction under voltage stimulation; while P means positive pole, formed by adding boron to replace silicon, creating numerous holes conducive to conduction). Apart from the difference in power supply polarity, their working principles are the same. Below, only the current amplification principle of NPN silicon transistors is introduced. For an NPN transistor, it is composed of 11 pieces of N-type semiconductor sandwiching one piece of P-type semiconductor. The PN junction formed between the emitter region and the base region is called the emitter junction, and the PN junction formed between the collector region and the base region is called the collector junction. The three leads are respectively called the emitter e, base b, and collector c. When the potential at point b is higher than the potential at point e by a few tenths of a volt, the emitter junction is in a forward-biased state; and when the potential at point C is higher than the potential at point b by a few volts, the collector junction is in a reverse-biased state. The collector power supply Ec must be higher than the base power supply Eb. In manufacturing transistors, the majority carrier concentration in the emitter region is intentionally made greater than that in the base region, the base region is made very thin, and the impurity content is strictly controlled. Thus, once the power is connected, due to the forward bias of the emitter junction, the majority carriers (electrons) in the emitter region and the majority carriers (holes) in the base region easily diffuse across the emitter junction towards each other. However, since the concentration of the former is much greater than that of the latter, the current passing through the emitter junction is basically an electron flow, known as the emitter electron flow.

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