kindermann electrical components, German kindermann models, kindermann prices

kindermann electrical components include circuit boards such as: ceramic circuit boards, alumina ceramic circuit boards, aluminum nitride ceramic circuit boards, printed wiring boards, PCB boards, aluminum substrate boards, high-frequency boards, heavy copper boards, impedance control boards, PCB, ultra-thin printed wiring boards, ultra-thin circuit boards, printed (copper etching technology) circuit boards, etc. Circuit boards miniaturize and visualize circuits, playing an important role in mass production of fixed circuits and optimizing appliance layout. Circuit boards can be called printed wiring boards or printed circuit boards; Flexible printed wiring boards and flexible circuit boards are made with polyimide or polyester film as the base material, offering high reliability, and excellent flexibility as printed circuit boards. They feature high wiring density, light weight, thin thickness, and good bendability. ) and rigid-flex boards—the emergence and development of FPC and PCB, gave rise to the new product: rigid-flex boards. Therefore, rigid-flex boards, are flexible printed wiring boards combined with rigid printed wiring boards, After processes such as lamination, assembled together according to relevant process requirements, forming a circuit board with FPC characteristics and PCB characteristics.

kindermann electrical component functions

A relay is an automatic switching component with isolation functionality, widely used in remote control, telemetry, communications, automatic control, mechatronics, and power electronic equipment, making it one of the most important control components. Relays generally have a sensing mechanism (input section) that responds to specific input variables (such as current, voltage, power, impedance, frequency, temperature, pressure, speed, light, etc.); an actuating mechanism (output section) that controls the "on" and "off" states of the controlled circuit; and an intermediate mechanism (drive section) between the input and output sections that provides coupling isolation, functional processing, and drives the output section. As control components, relays serve the following functions: (1) Expanding control range: For example, when a multi-contact relay control signal reaches a certain value, it can simultaneously switch, disconnect, or connect multiple circuits depending on the contact group configuration. (2) Amplification: For example, sensitive relays and intermediate relays can control high-power circuits using very small control signals. (3) Signal integration: For example, when multiple control signals are input into a multi-winding relay in a specified format, they are compared and integrated to achieve the predetermined control effect. (4) Automatic, remote control, and monitoring: For example, relays in automatic devices can form program control circuits together with other electrical appliances, thereby achieving automated operation.

kindermann electrical component principles

According to differences in application purposes, various types of thermometers have been designed and manufactured. The design basis includes: the phenomenon of thermal expansion and contraction of solids, liquids, and gases under the influence of temperature; under constant volume conditions, the pressure of gas (or vapor) changes with different temperatures; the effect of thermoelectric effects; the change of 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 its 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 convenient and reliable to use, 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 measuring junction, the other two ends are connected to the measuring instrument, forming a circuit. Place the measuring junction at the location where the temperature is to be measured, When the temperature of the measuring junction differs from that of the reference junction, an electromotive force is generated, causing current to flow through the circuit. By measuring electrical quantities and using the known temperature at one point, the temperature at another point can be determined. It is suitable for applications involving two substances with a large temperature difference, and is commonly used for high-temperature and low-turbidity measurements. 4. Dial thermometer: A thermometer shaped like an instrument panel, also known as a room thermometer, used to measure ambient temperature, manufactured based on 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 typically made by riveting a copper strip and an iron strip together, with the copper strip on the left and the iron strip on the right. Since the thermal expansion and contraction effect of copper is much more pronounced than that of iron, when the temperature rises, the copper strip pulls the iron strip, causing it to bend to the right, and the pointer, driven by the bimetallic strip, deflects to the right (indicating high temperature); conversely, when the temperature decreases, The pointer deflects to the left under the drive of the bimetallic strip. 5. Glass tube thermometer: A glass tube thermometer measures temperature based on the principle of thermal expansion and contraction. Due to differences in the expansion coefficient, boiling point, and freezing point of the temperature-measuring medium, the common glass tube thermometers mainly include: kerosene thermometers, mercury thermometers, and red ink thermometers. Its advantages are simple structure, ease of use, relatively high measurement accuracy, and low cost. The disadvantages are that the measurement range limits and accuracy are constrained by the quality of the glass and the properties of the temperature-measuring medium. It cannot transmit signals over long distances, and is fragile. 6. Pressure thermometer: A pressure thermometer uses the volume expansion or pressure change of liquid, gas, or saturated vapor in a sealed container upon heating as the measurement signal. Its basic structure consists of three parts: a temperature bulb, a capillary tube, and an indicator gauge. The advantages of pressure thermometers are: simple structure, high mechanical strength, and resistance to vibration. Low cost, and no external power source required. The disadvantages are: limited temperature measurement range; significant heat loss and slow response time. 8. Mercury thermometer is a type of expansion thermometer, and can only be used as a local monitoring instrument. Using it to measure temperature, Not only is it relatively simple and intuitive, but it also avoids the errors associated with external remote-reading thermometers.

kindermann electrical component principles

P-type semiconductors are formed by doping intrinsic semiconductors (a completely pure, structurally intact semiconductor crystal) with a small amount of trivalent impurity elements, such as boron. Since boron atoms have only three valence electrons, they form covalent bonds with surrounding silicon atoms. Due to the lack of one electron, a vacancy is created in the crystal. When electrons on adjacent covalent bonds gain energy, they may fill this vacancy, turning the boron atom into an immobile negative ion, while the covalent bond of the original silicon atom forms a hole due to the missing electron, but the entire semiconductor remains neutral. In this P-type semiconductor, conduction is primarily via holes, with holes as the majority carriers and free electrons as the minority carriers. The formation principle of N-type semiconductors is similar to that of P-type. Pentavalent atoms, such as phosphorus, are doped into the intrinsic semiconductor. After doping, they form covalent bonds with silicon atoms, generating free electrons. In N-type semiconductors, electrons are the majority carriers, and holes are the minority carriers. Therefore, doping trivalent and pentavalent impurity elements into two different regions of an intrinsic semiconductor forms P-type regions and N-type regions. Based on the characteristics of N-type and P-type semiconductors, it is known that a concentration difference of electrons and holes appears at their junction. Electrons and holes diffuse from high-concentration regions to low-concentration regions, and their diffusion disrupts the electrical neutrality at the original junction. PN junction unidirectional conductivity: When a forward voltage V is applied externally to the PN junction, the equilibrium state of the PN junction is broken under the influence of this external electric field. Holes in the P region and electrons in the N region move toward the PN junction. Holes neutralize the negative ions in the P region of the PN junction, and electrons neutralize the positive ions in the N region of the PN junction, thus narrowing the PN junction. As the external electric field increases, diffusion motion further strengthens, and drift motion weakens. When the external voltage exceeds the threshold voltage, the PN junction acts as a resistor with very low resistance, meaning the PN junction is conducting.

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