Eltex electrical components Germany Eltex model Eltex price

Eltex electrical components are accessory products used to achieve electrical connections, categorized industrially as connectors. As industrial automation levels rise and industrial control requirements become stricter and more precise, the usage of terminal blocks is gradually increasing. With the development of the electronics industry, the scope of use for terminal blocks is expanding, and the variety is growing. Besides PCB board terminals, the most widely used types include hardware terminals, nut terminals, spring terminals, and so on.

Eltex electrical component principles

Generators can convert mechanical energy into electrical energy, and dry cells can convert chemical energy into electrical energy. Generators and batteries themselves are not charged; their two poles have positive and negative charges respectively, generating voltage from these charges (current is formed by the directional movement of charges under the action of voltage). Charges are inherently present in conductors; to generate current, one only needs to apply voltage. When a conductor is connected to the two poles of a battery, positive and negative charges are released to generate current. When the charges are depleted, the charge, current, and voltage disappear. Dry cells and the like are called power sources. A device that converts alternating current into direct current through transformers and rectifiers is called a rectified power supply. Electronic devices capable of providing signals are called signal sources. Crystal triodes can amplify incoming signals and transmit the amplified signals to subsequent circuits. For the subsequent circuit, a crystal triode can also be regarded as a signal source. Rectified power supplies and signal sources are sometimes also referred to as power sources.

Eltex electrical component applications

SMD inductors are electromagnetic induction components wound with insulated wire. They belong to commonly used inductor components. The function of SMD inductors: passing DC and blocking AC is a simple description; they isolate and filter AC signals or form resonant circuits with capacitors, resistors, etc. Function of tuning and frequency selection inductors: an inductor coil connected in parallel with a capacitor can form an LC tuning circuit. Any current in the circuit through an SMD inductor generates a magnetic field, and the magnetic flux of this field acts on the circuit. When the current passing through the SMD inductor changes, the DC voltage potential generated in the SMD inductor will oppose the change in current. When the current through the inductor coil increases, the self-induced electromotive force generated by the inductor coil is opposite to the direction of the current, preventing the increase in current, while converting part of the electrical energy into magnetic energy stored in the inductor; when the current through the inductor coil decreases, the self-induced electromotive force is in the same direction as the current, preventing the decrease in current, while releasing stored energy to compensate for the decrease in current. Therefore, after inductive filtering, not only are the ripples of load current and voltage reduced and the waveform smoothed, but the conduction angle of the rectifier diode also increases. Inductor function 1: Color-ring inductors have a current-blocking effect: the copper core in the color-ring inductor coil always resists changes in the current within the coil. Color-ring inductors impede the alternating current used in circuits; 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. Color-ring inductors are mainly classified into high-frequency choking coils and low-frequency choking coils. Inductor function 2: Color-ring inductors have tuning and frequency selection functions: a color-ring inductor connected in parallel with an electrolytic capacitor can form an LC tuning circuit. At resonance, the inductive reactance and capacitive reactance of the circuit are equal in magnitude but opposite in direction, meaning the natural oscillation frequency f0 of the circuit equals the frequency f of the non-AC signal, so the inductive reactance and capacitive reactance of the loop are also equal. The usage of color-ring inductors is generally not very high, and those used in circuits are generally quite stable. Inductor function 13: The main uses of color-ring inductors include filtering signals, filtering noise, stabilizing current, and suppressing electromagnetic interference. The basic function of color-ring inductors is charging and discharging, but many circuit phenomena derived from this basic charging and discharging action give color-ring inductors various different applications. Today, color-ring inductors are widely used by customers, and the role played by these small inductors should not be underestimated.

Eltex electrical component parameters

The main parameters of potentiometers include nominal resistance, rated power, resolution, sliding noise, resistance variation characteristics, wear resistance, zero-position resistance, and temperature coefficient. 1. Rated power: The maximum power allowed to be dissipated across the two fixed terminals of a potentiometer is its rated power. Note that the rated power is not equal to the power between the center tap and the fixed terminal. The rated power of a potentiometer refers to the maximum power allowed to be consumed under long-term continuous load at the specified rated temperature, when the atmospheric pressure is 87~107kPa. 2. Nominal resistance: The nominal resistance marked on the product, with series similar to resistor series. 3. Allowable error class: The error range between the measured resistance and the nominal resistance allows for 20%, 10%, 5%, 2%, 1% errors depending on the precision class. The precision of precision potentiometers can reach 0.1%. 15. Resistance variation law: Refers to the relationship between resistance change and the rotation angle (or sliding travel) of the sliding contact. This relationship can take any functional form; common types include linear, logarithmic, and reverse logarithmic (exponential). In use, linear potentiometers are suitable as voltage dividers; reverse logarithmic (exponential) potentiometers are suitable as volume controllers in radios, recorders, phonographs, and televisions. If a replacement of the same type is not found during maintenance, a linear type can be used as a substitute, but a logarithmic type should not be used. Logarithmic potentiometers are only suitable for tone control, etc.

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