cimco electrical components Germany cimco model cimco price

cimco 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 widespread. Especially in various electronic circuits, by reasonably connecting diodes with resistors, capacitors, inductors, and other components to form circuits with different functions, it is possible to achieve functions such as rectification of alternating current, demodulation of modulated signals, limiting and clamping, and stabilization of power supply voltage.

cimco electrical component principle

Based on different usage purposes, various types of thermometers have been designed and manufactured. Their design is based on: the phenomenon of thermal expansion and contraction of solids, liquids, and gases under the influence of temperature; the change in pressure of gas (or vapor) due to temperature differences under constant volume conditions; the effect of thermoelectric effects; the change in resistance with temperature; the influence of thermal radiation, etc. 1. Gas thermometer: Hydrogen or helium is mostly used as the temperature-measuring substance because the liquefaction temperatures of hydrogen and helium are very low, close to absolute zero, so their temperature measurement range is very wide. This type of thermometer has high accuracy and is mostly used for precision measurements. 2. Resistance thermometer: Divided into metal resistance thermometers and semiconductor resistance thermometers, both are made based on the characteristic that resistance value changes with temperature. Metal thermometers mainly use pure metals such as platinum, gold, copper, and nickel, as well as rhodium-iron and phosphor bronze alloys; semiconductor thermometers mainly use carbon, germanium, etc. Resistance thermometers are easy to use and reliable, and have been widely applied. 3. Thermocouple thermometer: It is a temperature-measuring instrument widely used in industry. It is made using the thermoelectric effect. Two different metal wires are welded together to form the working end, and the other ends are connected to measuring instruments to form a circuit. When the working end is placed at the temperature to be measured, if the temperature of the working end differs from that of the free end, an electromotive force will appear, causing current to flow through the loop. By measuring electrical quantities and using the known temperature at one point, the temperature at another point can be determined. It is suitable for situations with large temperature differences between two substances, mostly used for high-temperature and low-turbidity measurements. 4. Pointer thermometer: It is a thermometer shaped like a dial, also known as a maximum-minimum thermometer, used to measure room temperature, made using the principle of thermal expansion and contraction of metals. It uses a bimetallic strip as the temperature-sensing element to control the pointer. The bimetallic strip is usually made by riveting a copper sheet and an iron sheet together, with the copper sheet on the left and the iron sheet on the right. Since the thermal expansion and contraction effect of copper is much more obvious than that of iron, when the temperature rises, the copper sheet pulls the iron sheet to bend to the right, and the pointer deflects to the right (pointing to high temperature) driven by the bimetallic strip; conversely, when the temperature drops, the pointer deflects to the left driven by the bimetallic strip. 5. Glass tube thermometer: Glass tube thermometers use the principle of thermal expansion and contraction to achieve temperature measurement. Due to the different expansion coefficients, boiling points, and freezing points of the temperature-measuring media, the common glass tube thermometers we see mainly include: kerosene thermometers, mercury thermometers, and red ink thermometers. Its advantages are simple structure, ease of use, relatively high measurement accuracy, and low price. The disadvantage is that the upper and lower measurement limits and accuracy are limited by the quality of the glass and the properties of the temperature-measuring medium. Moreover, it cannot transmit data remotely and is fragile. 6. Pressure thermometer: Pressure thermometers use the volume expansion or pressure change generated by heating liquid, gas, or saturated vapor in a closed container as the measurement signal. Its basic structure consists of three parts: the temperature bulb, capillary tube, and indicator gauge. The advantages of pressure thermometers are: simple structure, high mechanical strength, and resistance to vibration. Low price, no need for external energy. The disadvantages are: limited temperature measurement range; large heat loss and slow response time. 9. Mercury thermometer is a type of expansion thermometer, which can only be used as a local monitoring instrument. Using it to measure temperature is not only simple and intuitive, but also avoids errors associated with remote transmission thermometers.

cimco electrical component principle

The basic working principle of fiber optic sensors is to send light from a light source through an optical fiber into a modulator, causing the optical properties of the light (such as intensity, wavelength, frequency, phase, polarization state, etc.) to change after interacting with the parameter to be measured in the modulation zone, resulting in modulated signal light. Then, by utilizing the influence of the measured quantity on the transmission characteristics of light, the measurement is completed. There are two types of measurement principles for fiber optic sensors: (1) Physical property fiber optic sensor principle: Physical property fiber optic sensors utilize the sensitivity of optical fibers to environmental changes to convert input physical quantities into modulated optical signals. Its working principle is based on the optical modulation effect of optical fibers, i.e., the phenomenon where light transmission characteristics, such as phase and light intensity, change when the optical fiber is subjected to changes in external environmental factors such as temperature, pressure, electric field, magnetic field, etc. Therefore, if the changes in light phase and intensity passing through the optical fiber can be measured, the changes in the physical quantity being measured can be known. This type of sensor is also known as sensitive element type or functional fiber optic sensor. The point source beam of the laser diffuses into parallel waves, which are split into two paths by a beam splitter: one is the reference path, and the other is the measurement path. External parameters (temperature, pressure, vibration, etc.) cause changes in the length of the optical fiber and the optical phase, thereby generating different numbers of interference fringes. By counting the lateral movement of these fringes, temperature or pressure can be measured. (11) Structural fiber optic sensor principle: Structural fiber optic sensors are measurement systems composed of light detection elements (sensitive elements), optical fiber transmission loops, and measurement circuits. Here, the optical fiber serves only as the medium for light propagation, so it is also called light-transmitting or non-functional fiber optic sensor.

cimco electrical component requirements

1. Commonly used copper and aluminum rods for power cables are drawn at ambient temperature through one or several drawing dies using a wire drawing machine, reducing their cross-sectional area, increasing their length, and improving their strength. Wire drawing is the first process in wire and cable manufacturing, and the key process parameter is die matching. 2. Copper and aluminum single wires are heated to a specific temperature to improve toughness and reduce strength through recrystallization, meeting the requirements for conductive cores in wires and cables. The key aspect of the annealing process is to prevent oxidation of the copper wires. 3. To improve the flexibility of power cables for easier installation, the conductive core is formed by stranding multiple single wires. Stranding methods are classified into regular stranding and irregular stranding. Irregular stranding includes bunch stranding, concentric composite stranding, and special stranding. To reduce the occupied area and geometric dimensions of the power cable, compacted stranding is applied to the conductor, transforming the standard circular shape into semi-circular, sector-shaped, tile-shaped, and compacted circular shapes. This type of conductor is primarily used in power cables. 4. Plastic power cables mainly use extruded solid insulation layers. The tolerance of the insulation thickness is a key indicator of the extrusion process quality. Most product structural dimensions and their tolerances are clearly specified in standards. The surface of the plastic insulation layer must be smooth, free from defects such as roughness, scorching, or impurities. The cross-section of the insulation layer must be dense and robust, with no visible pinholes or bubbles. 5. Multi-core power cables are generally stranded into a circular shape to ensure form stability and reduce the overall cable profile. The stranding mechanism is similar to conductor stranding; due to the larger lay length, non-back-twist methods are mostly used. Technical requirements for cabling include: preventing twisted insulation cores from overturning and causing cable torsion, and avoiding damage to the insulation layer. During cabling, two additional processes are typically performed: filling, to ensure the cable remains round and stable after cabling, and binding, to keep the cable core compact. 6. To protect the insulated cores from damage by the armor, an appropriate inner sheath is required. Inner sheaths are classified into extruded inner sheaths (separator sleeves) and wrapped inner sheaths (cushioning layers). The wrapped cushioning layer replaces the binding tape and is applied simultaneously with the cabling process. 7. For underground power cables subject to certain positive pressure during operation, an internal steel tape armor structure can be selected. For installations subject to both positive pressure and tensile forces (such as in water, vertical shafts, or soil with significant elevation differences), a structure with internal steel wire armor should be selected. 10. The outer sheath is the component that protects the cable's insulation layer from environmental corrosion. Its main functions are to improve the mechanical strength of the power cable, provide resistance to chemical corrosion, moisture, and water ingress, and prevent combustion. Depending on the specific requirements for the power cable, a plastic sheath is directly extruded using an extruder.

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