THERMOSALD electrical components Germany THERMOSALD model THERMOSALD price

THERMOSALD electrical components are Zener diodes manufactured to provide voltage regulation by utilizing the reverse breakdown state of the PN junction, a phenomenon where the current can vary over a wide range while the voltage remains essentially constant. This diode is a semiconductor device that exhibits very high resistance up to the critical reverse breakdown voltage. At this critical breakdown point, the reverse resistance drops to a very low value; in this low-resistance region, the current increases while the voltage remains constant. Zener diodes are graded according to their breakdown voltage. Due to this characteristic, Zener diodes are primarily used as voltage regulators or voltage reference elements. Zener diodes can be connected in series for use at higher voltages, allowing for higher stabilized voltages through series connection.

THERMOSALD electrical component principle

The working principle of a discharge tube is gas gap discharge i. When a certain voltage is applied between the two electrodes of the discharge tube, a non-uniform electric field is generated between the electrodes. Under the influence of this electric field, the gas inside the tube begins to ionize. When the external voltage increases to the point where the field strength between the electrodes exceeds the insulation strength of the gas, the gap between the two electrodes breaks down and discharges, transitioning from an insulating state to a conductive state. After conduction, the voltage between the two electrodes of the discharge tube is maintained at the residual voltage level determined by the discharge arc channel. This residual voltage is generally very low, thereby protecting electronic equipment connected in parallel with the discharge tube from overvoltage damage.

THERMOSALD 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 material in the electrode reaction formula 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 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 is related only to the type of electrode active material, 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, distinguishing it 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 positive electrode potential and the negative electrode potential when the battery is in an open circuit (i.e., no current flows through the two electrodes). 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 electrodes in the electrolyte solution are usually not equilibrium electrode potentials, but stable electrode potentials. Generally, it can 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 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 (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 not in a linear relationship; it typically increases as current density increases. Internal resistance is an important indicator determining battery performance, directly affecting 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 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, with a numerical value equal to 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 protocol 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 capacity lost due to self-discharge per unit of storage time relative to the capacity before storage.

THERMOSALD electrical component function

Control high power, capable of controlling hundreds of kilowatts of power. Using power transistors as switches has many advantages, primarily ease of turn-off and fewer required auxiliary components. Fast switching allows operation at high frequencies. Transistor compounding (Darlington) and parallel connection are effective methods to increase transistor switching capability. In such high-power circuits, the main problem is wiring. Very high switching speeds can generate considerable interference voltage even on short connection lines. Simple and optimized base drive creates high performance. The base drive circuit not only drives the power transistor but also protects it, referred to as "decentralized protection" (as opposed to centralized protection). Functions of integrated drive circuits include: turning on and off the power switch, monitoring auxiliary supply voltage, limiting maximum and minimum pulse width, thermal protection, and monitoring the switch's saturation voltage drop.

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