KROMEXIM electrical components Germany KROMEXIM model KROMEXIM price

KROMEXIM electrical components are electronic devices made from semiconductor materials (silicon, selenium, germanium, etc.). A diode has two electrodes: the positive electrode, also called the anode; and the negative electrode, also called the cathode. When a forward voltage is applied across the two poles of the diode, the diode conducts; when a reverse voltage is applied, the diode cuts off. The conduction and cutoff of the diode are equivalent to the closing and opening of a switch. Diodes have unidirectional conductivity; when conducting, the current flows from the anode through the tube to the cathode. The diode is one of the earliest semiconductor devices, and its applications are very extensive. Especially in various electronic circuits, reasonable connections using diodes along with resistors, capacitors, inductors, and other components form circuits with different functions, achieving AC rectification, demodulation of modulated signals, limiting and clamping, and voltage stabilization of power supply voltage.

KROMEXIM electrical component function

The self-induced electromotive force in an inductor coil always opposes the change in current within the coil. The inductor coil impedes alternating current; the magnitude of this impedance is called inductive reactance xl, measured in ohms. Its relationship with inductance l and AC frequency f is xl=2πfl. Inductors can be mainly classified into high-frequency choke coils and low-frequency choke coils. An inductor coil connected in parallel with a capacitor can form an lc tuning circuit. That is, when the natural oscillation frequency f0 of the circuit equals the frequency f of the non-AC signal, the inductive reactance and capacitive reactance of the loop are equal, causing electromagnetic energy to oscillate back and forth between the inductor and capacitor; this is the resonance phenomenon of the lc loop. At resonance, the inductive reactance and capacitive reactance of the circuit are equal in magnitude but opposite in direction, resulting in minimum total loop current impedance and maximum current (referring to AC signals where f="f5"). The lc resonant circuit has frequency selection capability, able to select AC signals of a specific frequency f.

KROMEXIM electrical component usage

1, apply moderate force when tightening wiring connections to prevent stripping the threads of bolts and nuts due to excessive force. Replace any stripped bolts and nuts immediately; do not continue operation with compromised fasteners. 2, when using a screwdriver to tighten or loosen screws, apply firm pressure to ensure the screwdriver tip seats securely in the screw head before turning, to prevent slipping and damaging the screw, which makes disassembly difficult, especially for common miniature circuit breakers inside distribution boxes. 3, if bolts or nuts are difficult to remove, do not act rashly to avoid deformation that makes removal even harder. Apply appropriate tapping or use screw loosening agents or dilute hydrochloric acid, then attempt removal after a short wait. 4, do not use pliers to tighten or loosen bolts and nuts to prevent damage. When using an adjustable wrench, adjust the jaw opening properly to prevent damaging or deforming the bolt or nut, which would make disassembly difficult. 5, a single terminal block allows connection of at most two wires of the same type and specification. 6, for terminal blocks prone to loosening or poor contact, wire ends must be secured in a "?" shape on the terminal block to increase contact area and prevent loosening. 7, when connecting wire joints or cable lugs, it is strictly prohibited to install non-copper washers or washers with poor conductivity between them. 8, when connecting wire joints, the contact surfaces must be smooth and free of oxidation. When connecting cable lugs or copper bars, apply conductive paste to the cleaned contact surfaces before tightening. 9, when connecting temporary lines, single-strand flexible wires should have their ends folded once before connecting to the lower terminal of the miniature circuit breaker; single-core solid wires should be connected to the lower terminal of the miniature circuit breaker in a "?" shape. 10, for high-voltage motor wiring, no washers with poor conductivity (such as galvanized nuts, flat washers, spring washers, etc.) are allowed between the motor output leads and the cables connecting to the motor. 15, when wrapping cables or other equipment requiring insulation protection with insulating tape, the insulation layer should be wrapped from one end to the other with significant overlap, making at least one full back-and-forth pass.

KROMEXIM electrical component principle

LCD is a display that uses liquid crystal material. Liquid crystals are organic compounds intermediate between solid and liquid states. At room temperature, they exhibit both the fluidity of liquids and the optical anisotropy of crystals. They become a transparent liquid when heated and a crystalline opaque solid when cooled. Under the influence of an electric field, the arrangement of liquid crystal molecules changes, affecting the intensity of light passing through the liquid crystal. This change in light intensity is further manifested as brightness variations through the action of polarizers. Thus, by controlling the electric field of the liquid crystal, light brightness can be modulated to achieve information display. Therefore, the function of liquid crystal material is similar to small "light valves." Since control and drive circuits exist around the liquid crystal material, when electrodes in the LCD generate an electric field, the liquid crystal molecules twist, regularly refracting the light passing through them (optical rotation of the liquid crystal material), which is then filtered by the second polarizer and displayed on the screen. It is worth noting that because liquid crystal material does not emit light itself, LCD displays typically require an additional light source for the display panel, known as the "backlight module." The backlight plate consists of fluorescent materials that emit light, primarily providing a uniform backlight source.

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