Telecontrol electrical components German Telecontrol models Telecontrol prices

Telecontrol electrical components are products whose raw material molecular composition remains unchanged during factory processing, and can be referred to as components. Components belong to devices that do not require an energy source. They include: resistors, capacitors, and inductors. Circuit-type components include diodes and resistors; connection-type components include connectors, sockets, connecting cables, and printed circuit boards (PCB). Devices are products whose raw material molecular structure is altered during factory production and processing. Devices are divided into active devices and discrete devices. The main characteristic of active devices is that they consume electrical energy and require an external power supply. Discrete devices are divided into bipolar junction transistors, field-effect transistors, thyristors, semiconductor resistors, and capacitors. shi

Telecontrol electrical component principles

In power generation, transformation, transmission, distribution, and consumption circuits, current levels vary significantly, ranging from a few amperes to tens of thousands of amperes. To facilitate measurement, protection, and control, the current needs to be converted to a more uniform level. Additionally, voltages on lines are generally high, making direct measurement extremely dangerous. Current transformers serve the functions of current transformation and electrical isolation. For analog ammeters, the secondary current of current transformers is mostly in the ampere range. For digital instruments, the sampled signal is generally in the milliampere range. The secondary current of miniature current transformers is in the milliampere range, primarily serving as a bridge between large transformers and sampling circuits. Miniature current transformers are also referred to as "instrument current transformers." ("Instrument current transformer" implies precision current transformers with multiple current ratios used in laboratories, generally for extending instrument ranges.) Current transformers operate based on the principle of electromagnetic induction, similar to transformers; however, transformers transform voltage, while current transformers transform current. The winding connected to the measured current is called the primary winding; the winding connected to the measuring instrument is called the secondary winding. The ratio of the primary winding current I1 to the secondary winding I9 current is called the actual current ratio K. The current ratio when the current transformer operates at rated current is called the rated current ratio of the current transformer, denoted by Kn.

Telecontrol electrical component classification

1. Classification by relay physical dimensions: (1) miniature relays, (2) sub-miniature relays, (3) small miniature relays. 2. Classification by relay load: (1) micro-power relays, (2) low-power relays, (3) medium-power relays, (4) high-power relays. 6. Classification by relay protection characteristics: (1) Sealed relays: Relays where contacts and coils are sealed inside a cover using welding or other methods, isolated from the surrounding medium, resulting in a low leakage rate. (2) Enclosed relays: Relays where contacts and coils are protected by a housing (non-sealed). (3) Open relays: Relays that do not use a protective cover to protect contacts and coils. Among the above relays, electromagnetic relays and reed relays are the most commonly used in electronic fabrication.

Telecontrol electrical component principles

Lasing principle of laser diodes: The P-N junction in a laser diode is formed by two doped gallium arsenide layers. It has a planar structure parallel to one end mirror (highly reflective surface) and one partially reflective surface. 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 ordinary diodes. 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 surfaces perpendicularly and are reflected back along their original path. The reflected photons are again reflected back from the other end of the junction. This movement of photons from one end to the other occurs continuously multiple times. During photon movement, due to the avalanche effect, more atoms release more photons. 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 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 of the laser diode must exceed a certain threshold level. Currents below the threshold level force the diode to behave as an LED, emitting incoherent light.

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