kroschke electrical components Germany kroschke model kroschke price

kroschke 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 contacts are conductive, allowing current to flow; "open" switch status indicates that the electrical contacts are 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, it is necessary to consider their corrosion resistance, as most metals form insulating oxides after oxidation, preventing the contacts from functioning properly. Selection of contact metals must also consider factors such as electrical conductivity, hardness, mechanical strength, cost, and toxicity. Corrosion-resistant metals are sometimes plated onto the contacts. Plating is generally applied to the contact surfaces 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 contain movable parts that make or break the connection. Switches can be classified into toggle switches, push-button switches, rocker switches, etc., based on the different movable parts, and the movable parts can also be other types of mechanical linkages.

kroschke electrical component performance

The main performance indicators of a loudspeaker include parameters such as sensitivity, frequency response, rated power, rated impedance, directivity, and distortion. ① Rated power: Loudspeaker power is categorized into nominal power and maximum power. Nominal power, also referred to as rated power or non-distortion power, refers to the maximum input power allowed within the rated non-distortion range of the loudspeaker. The power value marked on the loudspeaker's label and technical manual is this rated power. Maximum power refers to the peak power that the loudspeaker can withstand at any given instant. ② Rated impedance: The impedance of a loudspeaker is generally frequency-dependent. ③ Frequency response: When audio signals of the same voltage but different frequencies are applied to a loudspeaker, the resulting sound pressure will vary. Typically, the sound pressure is higher in the mid-frequency range, while it is lower in the low-frequency and high-frequency ranges. The frequency range of high and low tones where the sound pressure drops to a certain value relative to the mid-frequency sound pressure is called the frequency response characteristic of the loudspeaker. ④ Distortion: Distortion refers to the phenomenon where the loudspeaker fails to accurately reproduce the original sound. There are two types of distortion: frequency distortion and nonlinear distortion. Frequency distortion occurs when certain frequency signals are reproduced with greater intensity while others are weaker, disrupting the original balance of high and low sound levels and altering the original timbre. Nonlinear distortion arises from inconsistencies between the vibration of the loudspeaker's vibrating system and the signal fluctuations, introducing new frequency components into the output sound waves. ⑤ Directivity characteristics: These describe the distribution of sound pressure radiated by the loudspeaker in various spatial directions. Higher frequencies result in narrower directivity, and larger diaphragms produce stronger directivity.

kroschke electrical component features

1. High sensitivity; 2. Geometric shape has multi-faceted adaptability, allowing fiber optic sensors to be made in any shape; 3. Can manufacture devices that sense various physical information (sound, magnetism, temperature, rotation, etc.); 4. Can be used in high voltage, electrical noise, high temperature, corrosive, or other harsh environments; 13. And has inherent compatibility with fiber optic telemetry technology. The advantages of fiber optic sensors compared to traditional sensors are that they use light as the carrier of sensitive information and optical fiber as the medium for transmitting sensitive information, possessing the characteristics of fiber optics and optical measurement, with a series of unique advantages. Good electrical insulation, strong anti-electromagnetic interference capability, non-intrusive, high sensitivity, easy to realize long-distance monitoring of measured signals, corrosion resistance, explosion-proof, flexible optical path, and convenient connection to computers. Sensors are developing towards sensitivity, precision, strong adaptability, compactness, and intelligence. They can serve as human eyes and ears in places inaccessible to humans (such as high-temperature areas or areas harmful to humans, such as nuclear radiation zones), and can even surpass human physiological limits, receiving external information imperceptible to human senses.

kroschke electrical component applications

Collector-emitter current can be viewed as controlled by base-emitter current, which is equivalent to treating the bipolar transistor as a "current-controlled" device. It can also be viewed as controlled by the emitter-base junction voltage, treating it as a "voltage-controlled" device. In fact, these two perspectives are interconnected through the current-voltage relationship across the base-emitter junction, which can be represented by the current-voltage curve of the PN junction. In analog circuit design, the current-controlled perspective is sometimes adopted because, within a certain range, the bipolar transistor exhibits approximately linear characteristics. In this range (referred to below as the "active region"), the collector current is approximately equal to a multiple of the base current, which greatly facilitates problem analysis and control of circuit functions. When designing some basic circuits, people assume the emitter-base voltage is an approximately constant value, at which point the collector current is approximately equal to several times the base current, and the transistor acts as a current amplifier. However, in reality, the bipolar transistor is a relatively complex nonlinear device; if the bias voltage distribution is improper, it will cause distortion of the output signal. Furthermore, even when operating within a specific range, its current amplification factor is affected by factors including temperature. To design precise and reliable bipolar transistor circuits, the voltage-controlled perspective must be adopted. The voltage-controlled model introduces an exponential function to describe the voltage-current relationship; within a certain range, the functional relationship is approximately linear, allowing the transistor to be treated as a conductance element. Thus, the design of circuits such as differential amplifiers is simplified to a linear problem, so the approximate voltage-controlled perspective is also frequently selected. For translinear circuits, studying their current-voltage curves is crucial for analyzing device operation, so they are usually treated as a voltage-controlled model where transconductance is proportional to collector current. Transistor-level circuit design mainly uses SPICE or other similar analog circuit simulators, so the complexity of the model does not pose a significant problem for designers. However, when manually analyzing analog circuit problems, it is not always possible to adopt exact calculation methods as in classical circuit analysis, making the use of approximation methods essential.

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