xELEKTROLUMEN electrical components Germany xELEKTROLUMEN model xELEKTROLUMEN price

xELEKTROLUMEN electrical component is a high-power electrical component, also known as a thyristor. It has the advantages of small size, high efficiency, and long service life. In automatic control systems, it can serve as a high-power drive device, enabling low-power control elements to control high-power equipment. It is widely used in AC/DC motor speed control systems, power regulation systems, and servo systems. Thyristors are divided into unidirectional thyristors and bidirectional thyristors. Bidirectional thyristors are also called triacs, abbreviated as TRIAC. A bidirectional thyristor is structurally equivalent to two unidirectional thyristors connected in reverse; this type of thyristor has bidirectional conduction capability. Its on/off state is determined by the gate G. Applying a positive pulse (or negative pulse) to the gate G enables forward (or reverse) conduction. The advantages of this device include a simple control circuit and no reverse voltage withstand issue, making it particularly suitable for use as an AC contactless switch.

xELEKTROLUMEN electrical component types

There are many types of loudspeakers. According to their transduction principle, they can be classified as dynamic (moving-coil), electrostatic (capacitive), electromagnetic (reed), piezoelectric (crystal), etc.; the latter two are mostly used in rural wired broadcasting networks. According to frequency range, they can be classified as low-frequency, mid-frequency, and high-frequency loudspeakers, which are often used as combination loudspeakers in speaker enclosures. Classified by transduction mechanism and structure, there are dynamic (electric), capacitive (electrostatic), piezoelectric (crystal or ceramic), electromagnetic (spring-loaded), ionophone, and pneumatic loudspeakers. Dynamic loudspeakers are widely applied due to their good electroacoustic performance, robust structure, and low cost. Classified by sound radiation material, there are cone, horn, and diaphragm types. Classified by cone shape, there are circular, oval, dual-cone, and rubber surround types. Classified by operating frequency, there are bass, midrange, and treble; some are further categorized as recorder-specific, TV-specific, general-purpose, and hi-fi loudspeakers. Classified by voice coil impedance, there are low-impedance and high-impedance types. Classified by effect, there are direct-radiating and ambient sound types. Loudspeakers are divided into built-in and external loudspeakers, with external loudspeakers generally referring to speaker boxes. Built-in loudspeakers mean that the MP4 player has built-in speakers, allowing users to listen to the sound from the MP4 player not only through the headphone jack but also through the built-in speakers. An MP8 player with built-in speakers can operate without external speakers and avoids the inconvenience of wearing headphones for extended periods.

xELEKTROLUMEN electrical component classification

Generator classifications include: (1) Generators are divided into DC generators and AC generators; (2) AC generators are divided into synchronous generators and asynchronous generators (rarely used); (3) AC generators can also be divided into single-phase generators and three-phase generators. There are many types of generators. Principally, they are divided into synchronous generators, asynchronous generators, single-phase generators, and three-phase generators. By generation method, they are divided into steam turbine generators, hydroelectric generators, diesel generators, gasoline generators, etc. By energy source, they are divided into thermal power generators, hydropower generators, etc.

xELEKTROLUMEN electrical component principle

In chemical batteries, the direct conversion of chemical energy into electrical energy results from spontaneous oxidation-reduction reactions occurring internally within the battery; these reactions take place at two electrodes. The negative electrode active material consists of reducing agents with a more negative potential that are stable in the electrolyte, such as active metals like zinc, cadmium, and lead, as well as hydrogen or hydrocarbons. The positive electrode active material consists of oxidizing agents with a more positive potential that are stable in the electrolyte, such as metal oxides like manganese dioxide, lead dioxide, and nickel oxide, oxygen or air, halogens and their salts, oxyacids and their salts, etc. The electrolyte is a material with good ionic conductivity, such as aqueous solutions of acids, bases, and salts, organic or inorganic non-aqueous solutions, molten salts, or solid electrolytes. When the external circuit is open, although there is a potential difference (open-circuit voltage) between the two poles, no current flows, and the chemical energy stored in the battery is not converted into electrical energy. When the external circuit is closed, current flows through the external circuit under the influence of the potential difference between the two electrodes. Simultaneously, inside the battery, since there are no free electrons in the electrolyte, charge transfer must accompany oxidation or reduction reactions at the interface between the active materials of the two poles and the electrolyte, as well as mass transfer of reactants and products. Charge transfer in the electrolyte is also accomplished by ion migration. Therefore, normal charge and mass transfer processes within the battery are necessary conditions for ensuring normal electrical energy output. During charging, the direction of charge and mass transfer processes inside the battery is opposite to that during discharging; electrode reactions must be reversible to ensure the normal progress of reverse mass and charge transfer processes. Thus, reversibility of electrode reactions is a necessary condition for constituting a storage battery. This is the basic thermodynamic relationship between battery electromotive force and battery reaction, and also the basic thermodynamic equation for calculating battery energy conversion efficiency. In practice, when current flows through an electrode, the electrode potential deviates from the thermodynamically balanced electrode potential; this phenomenon is called polarization. The greater the current density (current passing through unit electrode area), the more severe the polarization. Polarization is one of the important causes of battery energy loss. There are three causes of polarization: (1) Polarization caused by the resistance of various parts within the battery is called ohmic polarization; (2) Polarization caused by the hindrance of the charge transfer process in the electrode-electrolyte interface layer is called activation polarization; (3) Polarization caused by the sluggish mass transfer process in the electrode-electrolyte interface layer is called concentration polarization. Methods to reduce polarization include increasing the electrode reaction area, reducing current density, raising the reaction temperature, and improving the catalytic activity of the electrode surface.

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