kalthoff electrical components Germany kalthoff model kalthoff price

kalthoff electrical components refer to an electronic component that can open a circuit, interrupt current flow, or direct it to another circuit. The most common switches are electromechanical devices operated by humans, featuring one or more electrical contacts. "Closed" contacts indicate that the electrical contact is conductive, allowing current to flow; "open" switch status indicates that the electrical contact is non-conductive, forming an open circuit and preventing current flow. The simplest switch consists of two metal pieces called "contacts"; when the two contacts touch, they complete the current loop, and when they do not touch, the current path is open. When selecting contact metals, their corrosion resistance must be considered, as most metals form insulating oxides after oxidation, preventing normal contact operation. Selection of contact metal also requires consideration of electrical conductivity, hardness, mechanical strength, cost, and toxicity. Contacts are sometimes plated with corrosion-resistant metals. Plating is generally applied to the contact surface to prevent performance degradation due to oxides. Sometimes non-metallic conductive materials, such as conductive plastics, are used for contact surfaces. In addition to contacts, switches have moving parts that make or break the contact connection. Switches can be classified into toggle switches, push-button switches, rocker switches, etc., based on the type of moving part, and the moving part can also be other types of mechanical linkages.

kalthoff electrical component function

Photoelectric switches can be used in various applications. Avoid strong light sources; photoelectric switches generally operate stably under high ambient illumination. However, avoid aligning the sensor's optical axis directly with strong light sources such as sunlight or incandescent lamps. If the angle between the sensor (receiver) optical axis and the strong light source cannot be changed, install shading plates around the top of the sensor or use a long shading tube. To prevent mutual interference: New photoelectric switches usually have automatic mutual interference prevention functions, so mutual interference is generally not a concern. However, for HGK series through-beam infrared photoelectric switches installed close together in parallel groups, interference between adjacent groups must be prevented. The most effective way to prevent this interference is to cross-set the emitters and receivers, and when there are more than 6 groups, increase the spacing between groups. Of course, using models with different operating frequencies is also a good method. For retro-reflective photoelectric switches, an effective way to prevent mutual interference is to increase the spacing. Moreover, the greater the detection distance, the larger the spacing should be; the specific spacing should be determined based on debugging conditions. Of course, models with different operating frequencies can also be used. Influence of mirror angle: When the detected object is glossy or encounters a smooth metal surface, the reflectivity is generally very high, acting like a mirror. Adjust the installation so that the optical axis is not perpendicular to the detected object, thereby preventing malfunction. Eliminating background influence: When using retro-reflective diffuse emitters and receivers, unstable detection may occur if the detected object is close to the background, or if the photoelectric switch or background is a smooth object with high reflectivity. Therefore, you can switch to distance-limited emitters and receivers, or eliminate the issue by moving away from the background, removing the background, painting the background matte black, or making the background rough and dark. Use of self-diagnosis function: During installation or use, minor optical axis shifts, lens contamination, dust accumulation, external noise, or out-of-range ambient temperature may occur due to table or background influences and vibration. These issues may cause the photoelectric switch to deviate from its stable operating zone. In this case, the photoelectric switch's self-diagnosis function can be used to trigger the green stability indicator light, notifying the user to make timely adjustments.

kalthoff electrical component classification

Based on the working power supply of the motor, motors can be divided into DC motors and AC motors. AC motors are further divided into single-phase motors and three-phase motors. Motors can be classified into DC motors, asynchronous motors, and synchronous motors based on structure and working principle. Synchronous motors can be further divided into permanent magnet synchronous motors, reluctance synchronous motors, and hysteresis synchronous motors. Asynchronous motors can be divided into induction motors and AC commutator motors. Induction motors include three-phase asynchronous motors, single-phase asynchronous motors, and shaded-pole asynchronous motors. AC commutator motors include single-phase series-wound motors, universal AC/DC motors, and repulsion motors. Based on starting and running methods, motors can be classified into capacitor-start single-phase asynchronous motors, capacitor-run single-phase asynchronous motors, capacitor-start-run single-phase asynchronous motors, and split-phase single-phase asynchronous motors. Based on application, motors can be divided into drive motors and control motors. Drive motors include motors for power tools, motors for home appliances, and motors for other general small mechanical equipment. Control motors include stepper motors and servo motors. Based on rotor structure, motors can be divided into squirrel-cage induction motors and wound-rotor induction motors. Based on operating speed, motors can be classified into high-speed motors, low-speed motors, constant-speed motors, and variable-speed motors.

kalthoff electrical component principle

A Schottky diode is a metal-semiconductor device made by using noble metals (gold, silver, aluminum, platinum, etc.) A as the anode and N-type semiconductor B as the cathode, utilizing the rectifying characteristics of the barrier formed at their contact interface. Because there are abundant electrons in the N-type semiconductor and only a very small number of free electrons in the noble metal, electrons diffuse from the high-concentration B to the low-concentration A. Clearly, there are no holes in the metal A, so there is no hole diffusion movement from A to B. As electrons continuously diffuse from B to A, the electron concentration on the surface of B gradually decreases, destroying surface electrical neutrality and forming a barrier. The electric field direction is B → A. However, under the influence of this electric field, electrons in A also undergo drift movement from A → B, thereby weakening the electric field formed by diffusion. When a space charge region of a certain width is established, the electron drift movement caused by the electric field and the electron diffusion movement caused by the concentration difference reach relative equilibrium, forming the Schottky barrier. The internal circuit structure of a typical Schottky rectifier uses N-type semiconductor as the substrate, on which an N-epitaxial layer doped with arsenic is formed. The anode uses materials such as molybdenum or aluminum to form a barrier layer. Silicon dioxide is used to eliminate the electric field in the edge region, increasing the voltage withstand value of the diode. The N-type substrate has a very small on-state resistance, and its doping concentration is 104% times higher than that of the H-layer. An N+ cathode layer is formed beneath the substrate to reduce cathode contact resistance. By adjusting structural parameters, a Schottky barrier is formed between the N-type substrate and the anode metal.

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