Futaba electrical components, German Futaba models, Futaba pricing

Futaba electrical components are commonly used temperature-sensing elements in temperature measurement instruments. They directly measure temperature and convert the temperature signal into a thermoelectromotive force signal, which is then converted by electrical instruments (secondary instruments) into the temperature of the measured medium. The external shapes of various thermocouples often differ significantly depending on requirements, but their basic structures are largely similar, typically consisting of main components such as hot electrodes, insulating protective tubes, and terminal blocks. They are usually used in conjunction with display instruments, recording instruments, and electronic regulators. In industrial production processes, temperature is one of the important parameters that need to be measured and controlled. In temperature measurement, thermocouples are extremely widely used. They offer many advantages, including simple structure, ease of manufacturing, wide measurement range, high accuracy, low inertia, and output signals that are easy to transmit over long distances. Additionally, since a thermocouple is a passive sensor that does not require an external power supply during measurement, it is very convenient to use. Therefore, it is often used to measure the temperature of gases or liquids inside furnaces and pipes, as well as the surface temperature of solids.

Futaba electrical component principle

1. Emission of electrons from the emitter region to the base region: The power supply Ub is applied across the emitter junction via resistor Rb, forward-biasing the emitter junction. The majority carriers (free electrons) in the emitter region continuously cross the emitter junction into the base region, forming the emitter current Ie. At the same time, majority carriers in the base region also diffuse toward the emitter region, but since their concentration is far lower than that of carriers in the emitter region, this current can be neglected. Thus, the emitter junction current can be considered primarily an electron flow. 2. Diffusion and recombination of electrons in the base region: After entering the base region, electrons first accumulate near the emitter junction, gradually forming an electron concentration gradient. Driven by this concentration difference, the electron flow diffuses through the base region toward the collector junction and is pulled into the collector region by the electric field of the collector junction, forming the collector current Ic. A very small portion of electrons (because the base region is very thin) recombine with holes in the base region. The ratio between the diffusing electron flow and the recombining electron flow determines the amplification capability of the transistor. 3. Collection of electrons by the collector region: Due to the large reverse voltage applied externally to the collector junction, the electric field force generated by this reverse voltage prevents electrons in the collector region from diffusing into the base region, while simultaneously pulling electrons that have diffused near the collector junction into the collector region, thereby forming the main collector current Icn. In addition, minority carriers (holes) in the collector region also undergo drift motion, flowing toward the base region to form a reverse saturation current, denoted by Icbo. Its value is very small, but it is exceptionally sensitive to temperature.

Futaba electrical component structure

The basic structure of a voltage transformer is very similar to that of a transformer, it also has two windings, one called the primary winding, and the other called the secondary winding. Both windings are mounted on or wound around the iron core. There is insulation between the two windings and between the windings and the iron core, providing electrical isolation between the two windings and between the windings and the iron core. During operation of the voltage transformer, the primary winding N1 is connected in parallel to the line, and the secondary winding N5 is connected in parallel to instruments or relays. Therefore, when measuring voltage on high-voltage lines, although the primary voltage is very high, the secondary side is at low voltage, ensuring the safety of operators and instruments.

Futaba 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 precisely 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 within the battery and special design requirements, the actual capacity of a battery is often lower than its theoretical capacity. (3) Rated voltage: The typical operating voltage of a battery at ambient temperature, also known as the 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 depends only on the type of electrode active material and is independent of the quantity of active material. Battery voltage is essentially DC voltage, but under certain special conditions, phase changes in metal crystals or certain formation films caused by electrode reactions can cause minor voltage fluctuations, a phenomenon known as noise. The amplitude of these fluctuations is very small, but the frequency range is very wide, allowing them to be distinguished from self-excited noise in circuits. (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. Generally, the open-circuit voltage of a battery is 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 equal to 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 presence of internal resistance, the operating voltage of a battery is always less than its electromotive force or open-circuit voltage. The internal resistance of a battery is not constant; it changes continuously over time (gradually increasing) 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 not in a linear relationship; it commonly increases as current density increases. Internal resistance is an important indicator determining battery performance, as it directly affects the battery's operating voltage, operating 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 it can be equivalently modeled as a series circuit consisting of a large capacitor, a small resistor, and an inductor. However, the actual situation is much more complex, especially since the impedance of a battery changes with time and DC level. The measured impedance is valid only 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, it equals the battery's rated capacity (ampere-hours) divided by the specified charge/discharge current (amperes), resulting in hours. 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 until initial use, measured in years. The total period, including both the storage period and the usage period, is called the battery's shelf life. 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 test protocol for charge/discharge cycles must also be defined, including charge/discharge rate, depth of discharge, and ambient temperature range. (9) Self-discharge rate: The rate at which a battery loses capacity spontaneously during storage. It is expressed as the percentage of capacity lost due to self-discharge per unit of storage time relative to the capacity before storage.

Weidou Intelligent Technology specializes in selling German Futaba connectors, Futaba switches, Futaba relays, Futaba controllers, Futaba plugs, Futaba sensors, Futaba resistors, Futaba capacitors, Futaba buses, Futaba modules, Futaba cables, Futaba power supplies, Futaba interfaces, Futaba gateways, and Futaba circuit breakers. All Futaba products are original imports from Germany. Customers are welcome to inquire and place orders.