schramm electrical components German schramm models schramm prices

schramm electrical components refer to an electrical device that disconnects the circuit by melting the fuse element with the heat generated by itself when the current exceeds a specified value. A fuse is a current protection device made based on the principle that when the current exceeds the specified value for a period of time, the heat generated by itself melts the fuse element, thereby disconnecting the circuit. Fuses are widely used in high and low voltage distribution systems, control systems, and electrical equipment as short-circuit and overcurrent protectors, and are one of the most commonly used protective devices. It is an electrical device that uses a metal conductor as the fuse element connected in series in the circuit. When overload or short-circuit current passes through the fuse element, it melts due to its own heating, thereby breaking the circuit. Fuses have a simple structure and are easy to use, and are widely used as protective devices in power systems, various electrical equipment, and household appliances.

schramm electrical component structure

A thermopile is a pyroelectric infrared sensor, which is a device composed of thermocouples. It is widely used as a temperature detection device in fields such as ear thermometers, radiation thermometers, electric ovens, and food temperature detection. It is composed of two or more thermocouples connected in series, and the thermoelectric potentials output by each thermocouple are superimposed on each other. Used to measure small temperature differences or average temperatures. Structure of a thermopile: The radiation receiving surface is divided into several blocks, each connected to a thermocouple. Connecting them in series forms a thermopile. Depending on the application, practical thermopiles can be made into wire-type and thin-film types, and can also be made into multi-channel and array devices.

schramm electrical component performance

(1) Electromotive force: Electromotive force is the difference between the equilibrium electrode potentials of the two electrodes. (2) Rated capacity: The theoretical capacity of a battery can be accurately calculated based on the amount of active electrode material in the battery reaction equation and the electrochemical equivalent of the active material calculated according to Faraday's law. Due to possible side reactions in the battery and special design requirements, the actual capacity of the battery is often lower than the theoretical capacity. (3) Rated voltage: The typical operating voltage of a battery at room temperature, also known as nominal voltage. It serves as a reference when selecting different types of batteries. The actual operating voltage of a battery equals the difference between the equilibrium electrode potentials of the positive and negative electrodes under different usage conditions. It is only related to the type of electrode active material and not to the quantity of active material. Battery voltage is essentially DC voltage, but under certain special conditions, phase changes in metal crystals or certain phase films caused by electrode reactions can cause minor voltage fluctuations, a phenomenon known as noise. The amplitude of the fluctuation is very small but the frequency range is very wide, so it can be distinguished from self-excited noise in the circuit. (4) Open-circuit voltage: The terminal voltage of a battery in an open-circuit state is called the open-circuit voltage. The open-circuit voltage of a battery equals the difference between the electrode potential of the positive electrode and the electrode potential of the negative electrode when the battery is in an open circuit (i.e., no current flows through the two poles). The open-circuit voltage of a battery is denoted by V. The open-circuit voltage of a battery is generally less than its electromotive force. This is because the electrode potentials established by the two poles in the electrolyte solution are usually not equilibrium electrode potentials, but stable electrode potentials. It can generally be approximated that the open-circuit voltage of a battery is its electromotive force. (5) Internal resistance: The internal resistance of a battery refers to the resistance encountered when current flows through the interior of the battery. It includes ohmic internal resistance and polarization internal resistance; polarization internal resistance further includes electrochemical polarization internal resistance and concentration polarization internal resistance. Due to the existence of internal resistance, the working voltage of a battery is always less than the electromotive force or open-circuit voltage of the battery. The internal resistance of a battery is not constant; it changes continuously (gradually increasing) over time during charging and discharging processes because the composition of active materials, the concentration of the electrolyte, and the temperature are constantly changing. Ohmic internal resistance obeys Ohm's law. Polarization internal resistance increases with increasing current density, but the relationship is not linear. It often increases with increasing current density. Internal resistance is an important indicator determining battery performance; it directly affects the battery's working voltage, working current, output energy, and power. For a battery, the smaller the internal resistance, the better. (6) Impedance: A battery has a large electrode-electrolyte interface area, so the battery can be equivalent to a series circuit of a large capacitor with a small resistor and inductor. However, the actual situation is much more complex, especially since the battery's impedance changes with time and DC level. The measured impedance is only valid for the specific measurement state. (7) Charge/discharge rate: There are two representation methods: hour rate and C-rate. The hour rate expresses the charge/discharge rate in terms of charge/discharge time, numerically equal to the number of hours obtained by dividing the battery's rated capacity (ampere-hours) by the specified charge/discharge current (amperes). The C-rate is another way to express the charge/discharge rate, and its value is the reciprocal of the hour rate. The discharge rate of a primary battery is expressed by the time it takes to discharge through a fixed resistor to the cutoff voltage. The discharge rate has a significant impact on battery performance. (8) Service life: Storage life refers to the maximum allowable storage time from battery manufacture to the start of use, measured in years. The total period including the storage period and the usage period is called the battery's validity period. The storage life of batteries is divided into dry storage life and wet storage life. Cycle life is the maximum number of charge/discharge cycles a rechargeable battery can achieve under specified conditions. When specifying cycle life, the charge/discharge cycle test regimen must also be specified, including charge/discharge rate, depth of discharge, and ambient temperature range. (9) Self-discharge rate: The rate at which a battery loses its capacity spontaneously during storage. It is expressed as the percentage of the capacity lost due to self-discharge during a unit storage time relative to the capacity before storage.

schramm electrical component classification

1. By application: Pressure-sensitive and force-sensitive sensors, position sensors, liquid level sensors, energy consumption sensors, speed sensors, acceleration sensors, radiation sensors, thermal sensors. 2. By principle: Vibration sensors, humidity-sensitive sensors, magnetic-sensitive sensors, gas-sensitive sensors, vacuum degree sensors, biosensors, etc. 3. By output signal: (1) Analog sensors can convert non-electrical quantities being measured into analog electrical signals. (2) Digital sensors: Convert non-electrical quantities being measured into digital output signals (including direct and indirect conversion). (3) Pseudo-digital sensors: Convert the signal quantity being measured into frequency signals or short-period signal outputs (including direct or indirect conversion). (4) Switch sensors: When a measured signal reaches a specific threshold, the sensor correspondingly outputs a set low-level or high-level signal. 4. By manufacturing process: Integrated sensors are manufactured using standard production processes for silicon-based semiconductor integrated circuits. Usually, part of the circuit for preliminary processing of the measured signal is also integrated on the same chip. Thin-film sensors are formed by depositing thin films of corresponding sensitive materials on a dielectric substrate (base plate). When using hybrid processes, part of the circuit can also be manufactured on this substrate. Thick-film sensors are made by coating slurries of corresponding materials onto ceramic substrates, typically made of alumina, followed by heat treatment to form the thick film. Ceramic sensors are produced using standard ceramic processes or certain variant processes (sol-gel, etc.). After appropriate preparatory operations, the formed elements are sintered at high temperatures. There are many common characteristics between thick-film and ceramic sensor processes; in some aspects, thick-film technology can be considered a variant of ceramic technology. Each process technology has its own advantages and disadvantages. Due to lower capital investment required for research, development, and production, as well as the high stability of sensor parameters, it is more reasonable to adopt ceramic and thick-film sensors. 5. By measurement objective: Physical sensors are made using the characteristic that certain physical properties of the measured substance undergo significant changes. Chemical sensors are made using sensitive elements that can convert chemical quantities such as the composition and concentration of chemical substances into electrical quantities. Biological sensors are made using the characteristics of various organisms or biological substances, used to detect and identify chemical components in biological bodies. 6. By composition: (1) Basic sensors are the most fundamental single transformation devices. (2) Combined sensors are sensors composed of different single transformation devices. (3) Application-specific sensors are sensors composed of basic sensors or combined sensors combined with other mechanisms. 11. By mode of action: Sensors can be divided into active and passive types based on their mode of action. Active sensors include acting type and reacting type. Such sensors can emit a certain detection signal to the object being measured, detect changes produced by the detection signal in the object being measured, or form a signal by producing a certain effect in the object being measured via the detection signal. Those that detect changes in the detection signal are called acting type, while those that detect responses to form signals are called reacting type. Radar and radio frequency detectors are examples of acting type, while photoacoustic effect analysis devices and laser analyzers are examples of reacting type. Passive sensors only receive signals generated by the object being measured itself, such as infrared radiation thermometers and infrared imaging devices.

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