ewon electrical components, German ewon models, ewon prices

ewon electrical components are devices that convert other forms of energy into electrical energy and supply it to circuits (electronic devices). Power sources operate on the principle of electromagnetic induction, generating electricity from renewable sources such as hydropower, wind power, tides, dam water pressure differences, and solar energy, as well as from burning coal and oil residue. A power source is a device that supplies power to electronic equipment, also known as a power supply unit; it provides the electrical energy required by all components in a computer. The magnitude of the power supply, and the stability of current and voltage, directly affect the performance and service life of the computer.

ewon electrical component functions

The primary function of ferrite beads is to eliminate RF noise present in transmission line structures (circuits). RF energy consists of AC sinusoidal components superimposed on the DC transmission level, where the DC component is the desired useful signal. To eliminate this unwanted signal energy, chip ferrite beads act as high-frequency resistors (attenuators). Ferrite beads have high resistivity and permeability; they are equivalent to a resistor and an inductor in series, but both resistance and inductance vary with frequency. They offer better high-frequency filtering characteristics than ordinary inductors, exhibiting resistive behavior at high frequencies, thereby maintaining high impedance over a relatively wide frequency range and improving tuning and filtering effects. Inductors can be used for power supply filtering. The circuit symbol for a ferrite bead is the same as that for an inductor, but the model number indicates the use of a ferrite bead. In terms of circuit function, ferrite beads and inductors operate on the same principle, differing only in their frequency characteristics. The DC component is the desired useful signal, whereas RF energy constitutes useless electromagnetic interference that propagates and radiates along the line. To eliminate this unwanted signal energy, chip ferrite beads act as high-frequency resistors (attenuators), allowing DC signals to pass while filtering out AC signals. Ferrite beads have high resistivity and permeability, equivalent to a resistor and an inductor in series. In a circuit, the wire simply passes through them. High-frequency currents are dissipated as heat within them; their equivalent circuit is an inductor and a resistor in series, with both component values proportional to the length of the ferrite bead. Some ferrite beads have multiple holes; passing the wire through them increases component impedance (proportional to the square of the number of passes through the bead). Ferrite beads can not only filter high-frequency noise in power supply circuits (suitable for both DC and AC outputs) but are also widely used in other circuits.

ewon electrical component parameters

(1) Rated operating voltage: refers to the voltage required by the coil for the relay to operate normally. Depending on the relay model, this can be AC or DC voltage. (2) DC resistance: refers to the DC resistance of the relay coil, which can be measured with a multimeter. (3) Pull-in current: refers to the minimum current required for the relay to perform the pull-in action. During normal operation, the applied current must be slightly greater than the pull-in current to ensure stable relay operation. Generally, the voltage applied to the coil should not exceed the rated operating voltage; otherwise, excessive current may burn out the coil. (4) Release current: refers to the maximum current at which the relay performs the release action. When the current in the pulled-in state decreases to a certain level, the relay returns to the de-energized released state; this current is significantly lower than the pull-in current. (5) Contact switching voltage and current: refer to the voltage and current that the relay is allowed to handle. These values determine the magnitude of voltage and current the relay can control. Do not exceed these limits during use, as doing so can easily damage the relay contacts.

ewon electrical component principles

An NPN type bipolar transistor can be viewed as two diodes connected together with a common anode. In the normal operating state of a bipolar transistor, the base-emitter junction is forward-biased, while the base-collector junction is reverse-biased. Without external voltage, the electron concentration in the N region of the emitter junction is higher than that in the P region, causing some electrons to diffuse into the P region. Similarly, some holes from the P region diffuse into the N region. This forms a space charge region at the emitter junction, generating an internal electric field directed from the N region to the P region, which hinders further diffusion and achieves dynamic equilibrium. Applying a forward voltage to the emitter junction breaks this balance between carrier diffusion and the internal electric field in the depletion layer, injecting thermally excited electrons into the base region. In an NPN type transistor, the base region is P type doped, where holes are the majority carriers; thus, electrons in this region are called "minority carriers." Electrons injected from the emitter into the base region partly recombine with the majority carrier holes there. However, due to the low doping level and thin physical dimensions of the base region, and because the collector junction is reverse-biased, most electrons reach the collector region via drift motion, forming the collector current. To minimize recombination before electrons reach the collector junction, the base region must be made sufficiently thin so that the carrier diffusion time is shorter than the minority carrier lifetime in the semiconductor; simultaneously, the base thickness must be much smaller than the electron diffusion length. In modern bipolar transistors, the typical base region thickness is a few tenths of a micron. Note that although both the collector and emitter are N type doped, their doping levels and physical properties differ; therefore, a bipolar transistor must be distinguished from a configuration of two diodes connected in series in opposite directions.

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