Hylec electrical components German Hylec models Hylec prices

Hylec electrical components refer to devices that convert chemical energy into electrical energy, consisting of cups, tanks, or other containers or partial spaces of composite containers holding electrolyte solutions and metal electrodes to generate current. They have distinct positive and negative poles. With technological advancements, the term battery broadly refers to small devices capable of generating electrical energy, such as solar cells. Key performance parameters of batteries include electromotive force, capacity, specific energy, and resistance. Using batteries as an energy source provides stable voltage, stable current, long-term stable power supply, and current minimally affected by external factors. Additionally, batteries feature a simple structure, are portable, offer easy charging and discharging operations, are unaffected by external climate and temperature, and provide stable and reliable performance, playing a significant role in various aspects of modern social life.

Hylec electrical component applications

The most basic application of a conventional thyristor is controlled rectification. The familiar diode rectifier circuit belongs to the category of uncontrolled rectifier circuits. If the diodes are replaced with thyristors, a controlled rectifier circuit can be formed. Taking the simplest single-phase half-wave controlled rectifier circuit as an example, during the positive half-cycle of the sinusoidal AC voltage U2, if no trigger pulse Ug is input to the gate of VS, VS still cannot conduct, only when U2 is in the positive half-cycle, and a trigger pulse Ug is applied externally to the gate, the thyristor is triggered into conduction. Plot its waveforms (c) and (d), only when the trigger pulse Ug arrives, will there be voltage UL output across the load RL. If Ug arrives earlier, the thyristor conducts earlier; if Ug arrives later, the thyristor conducts later. By changing the arrival time of the trigger pulse Ug at the gate, the average value of the output voltage UL across the load can be adjusted. In electrical engineering technology, half a cycle of AC power is often defined as 180°, called the electrical angle. Thus, During each positive half-cycle of U2, The electrical angle elapsed from the zero value to the instant the trigger pulse arrives is called the control angle α; The electrical angle during which the thyristor conducts within each positive half-cycle is called the conduction angle θ. Obviously, Both α and θ are used to indicate the conduction or blocking range of the thyristor during the half-cycle when it is subjected to forward voltage. By changing the control angle α or the conduction angle θ, the average value of the pulsed DC voltage across the load UL is changed, achieving controlled rectification. Low-power plastic-packaged bidirectional thyristors are typically used in sound- and light-controlled lighting systems. The rated current is less than 5A. For medium and high power, plastic-packaged and metal-can packaged thyristors are typically used in power-type controllable voltage regulation circuits. Such as adjustable-output DC power supplies, etc. High-power, high-frequency thyristors are typically used in industrial applications; such as high-frequency melting furnaces, etc.

Hylec electrical component structure

A bipolar junction transistor is made by fabricating two closely spaced PN junctions on a semiconductor substrate. These two PN junctions divide the semiconductor into three parts: the base region in the middle, and the emitter and collector regions on the sides. The configurations are PNP and NPN. Corresponding electrodes are led out from the three regions: base b, emitter e, and collector c. The PN junction between the emitter and base is called the emitter junction, and the PN junction between the collector and base is called the collector junction. The base region is very thin, while the emitter region is thicker with high impurity concentration. In PNP type transistors, the emitter "emits" holes, whose movement direction is consistent with the current direction, so the emitter arrow points inward. In NPN type transistors, the emitter "emits" free electrons, whose movement direction is opposite to the current direction, so the emitter arrow points outward. The emitter arrow also indicates the conduction direction of the PN junction under forward voltage. Both silicon and germanium transistors come in PNP and NPN types. Transistor packages and pin identification: Common transistor packages include metal and plastic types. Pin arrangements follow certain patterns. In a bottom view, with the three pins forming the vertices of an isosceles triangle, they are arranged from left to right as e, b, c. For small and medium-power plastic transistors, orient the flat side towards you with the pins facing down; from left to right, they are e, b, c.

Hylec electrical component classification

(1) Point-contact diodes have a small PN junction contact area, cannot handle large forward currents or high reverse voltages, but offer good high-frequency performance, making them suitable for high-frequency detection and switching circuits. (2) Surface-contact diodes have a large PN junction contact area, can handle larger currents and withstand higher reverse voltages, making them suitable for rectifier circuits. (3) Planar diodes have a small PN junction area when used as switches in pulse digital circuits, and a larger PN junction area for high-power rectification. (4) Zener diodes are a special type of surface-contact silicon semiconductor diode that stabilizes voltage. The main difference between zener diodes and ordinary diodes is that zener diodes operate in the reverse breakdown state of the PN junction. By controlling manufacturing processes and limiting reverse current during use, zener diodes are prevented from overheating and damage in reverse breakdown. Unlike ordinary diodes, their reverse breakdown is reversible; as long as the current does not exceed the allowed value, the PN junction will not overheat and fail. When the external reverse voltage is removed, the zener diode restores its original performance, exhibiting good repetitive breakdown characteristics. (5) Photodiodes, also known as photosensitive diodes, have a glass window on their package to accept light. When light strikes the PN junction, it generates electron-hole pairs, increasing the concentration of minority carriers in the semiconductor. Under a certain reverse bias voltage, this increases the reverse current. Thus, the reverse current increases linearly with light intensity. Without light, the V-I characteristics of a photodiode are similar to those of an ordinary diode. Photodiodes serve as light-controlled components for object detection, photoelectric control, automatic alarms, etc. Large-area photodiodes can act as an energy source, called solar cells, converting light energy directly into electrical energy without an external power source. (6) Light-emitting diodes (LEDs) are solid-state semiconductor display devices that convert electrical energy directly into light energy, abbreviated as LED. Similar to ordinary diodes, LEDs consist of a PN junction. The PN junction is encapsulated in transparent plastic, with shapes including square, rectangular, and circular. LEDs offer low drive voltage, low operating current, strong vibration and shock resistance, small size, high reliability, low power consumption, and long life, widely used in signal indication circuits. Common seven-segment displays in electronics use LEDs. The principle of LEDs is opposite to that of photodiodes. When forward-biased and conducting current, LEDs emit light due to energy release during direct recombination of electrons and holes. Their spectral range is narrow, with wavelength determined by the base material used.

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