TEKON electrical components German TEKON model TEKON price

TEKON electrical components are semiconductor transistors, also known as bipolar junction transistors or crystal triodes, which are semiconductor devices that control current. Their function is to amplify weak signals into electrical signals with larger amplitudes, and they are also used as contactless switches. Transistors are one of the basic semiconductor components, featuring current amplification capabilities, and are core components in electronic circuits. A transistor is formed by creating two closely spaced PN junctions on a single semiconductor substrate; these two PN junctions divide the entire semiconductor into three parts: the base region in the middle, and the emitter and collector regions on either side. The arrangements include PNP and NPN types.

TEKON electrical component principles

Light emission principle of laser diodes: The P-N junction in a laser diode is formed by two doped gallium arsenide layers. It has a flat-end structure, parallel to a mirror at one end (highly reflective surface) and a partially reflective surface at the other. The wavelength of the emitted light is directly related to the length of the junction. When the P-N junction is forward-biased by an external voltage source, electrons move through the junction and recombine as in a standard diode. When electrons recombine with holes, photons are released. These photons strike atoms, causing more photons to be released. As the forward bias current increases, more electrons enter the depletion region, leading to the emission of more photons. Eventually, some photons drifting randomly within the depletion region strike the reflective surface perpendicularly and reflect back along their original path. The reflected photons are then reflected back from the other end of the junction. This movement of photons from one end to the other occurs multiple times continuously. During photon movement, more atoms release more photons due to the avalanche effect. This process of reflection and generation of increasing numbers of photons produces a very intense laser beam. Each photon generated in the emission process described above is identical to other photons in terms of energy level, phase relationship, and frequency. Therefore, the emission process yields a laser beam of a single wavelength. To generate a laser beam, the current in the laser diode must exceed a certain threshold level. Current below the threshold level forces the diode to behave as an LED, emitting incoherent light.

TEKON electrical component principles

A crystal diode consists of a p-n junction formed by p-type semiconductor and n-type semiconductor materials. A space charge layer forms on both sides of the interface, establishing a built-in electric field. When no external voltage is applied, the diode is in electrical equilibrium because the diffusion current caused by the carrier concentration difference across the p-n junction equals the drift current caused by the built-in electric field. When an external forward voltage bias is applied, the mutual cancellation between the external electric field and the built-in electric field increases the carrier diffusion current, resulting in a forward current. When an external reverse voltage bias is applied, the external electric field further strengthens the built-in electric field, forming a reverse saturation current within a certain reverse voltage range that is independent of the reverse bias voltage value. When the applied reverse voltage reaches a certain level, the electric field strength in the space charge layer of the p-n junction reaches a critical value, triggering a carrier multiplication process that generates a large number of electron-hole pairs, resulting in a significant reverse breakdown current, known as the diode breakdown phenomenon.

TEKON electrical component characteristics

(1) offers a wide transient response range and strong harmonic measurement capability. The quality of transient characteristics is an important parameter for determining whether a transformer can be applied in power systems, particularly regarding coordination with relay protection operation times. Traditional electromagnetic transformers have poor response characteristics to high-frequency signals due to the presence of an iron core, and cannot correctly reflect the transient process on the primary side. In contrast, the frequency range of optical current transformers is mainly determined by the electronic circuitry, without issues of iron core saturation, thus accurately reflecting the transient process on the primary side. The structure of optical sensors allows for the measurement of harmonics on high-voltage power lines, which is difficult to achieve with electromagnetic induction transformers. (2) digital interfaces provide strong communication capabilities. Since optical sensors transmit optical digital signals, they interface easily with communication networks, and there is no measurement error during transmission. Meanwhile, with the widespread adoption of microprocessor-based protection and control equipment, optical current transformers can directly provide digital quantities to secondary equipment, thereby eliminating the need for converters and A/D sampling sections in original protection devices. This greatly simplifies secondary equipment and promotes research into new protection principles. (3) features small size, light weight, and easy upgradability, meeting the requirements for miniaturized and compact substations. Since optical sensors rely on sensor heads and electronic circuits for signal acquisition and processing, they are compact, with weights generally below 1007 kg, making them easy to integrate into AIS or GIS. This significantly reduces the footprint of substations, satisfying the requirements for substation miniaturization and compactness. Additionally, optical current transformers connect to secondary equipment via a small number of optical fibers, greatly reducing the need for cable trenches and cables.

Weidou Intelligent Technology specializes in selling German TEKON connectors, TEKON switches, TEKON relays, TEKON controllers, TEKON plugs, TEKON sensors, TEKON resistors, TEKON capacitors, TEKON buses, TEKON modules, TEKON cables, TEKON power supplies, TEKON interfaces, TEKON gateways, and TEKON circuit breakers. TEKON products are original imports from Germany. Customers are welcome to inquire and place orders.