By EECTECH | 17 May 2020 | 0 Comments
Detailed explanation of the application of aluminum housing resistors and the role of aluminum housi
Aluminum shell resistor, the shell is made of aluminum alloy (gold aluminum shell), with heat dissipation grooves on the surface, small size, high power, high temperature resistance, strong overload capability, weather resistance, high precision, standard low inductive resistance, high stability, strong structure , It has good flexibility and multiple combination options, which is good for mechanical protection and convenient for installation and use. The main physical feature of the aluminum shell resistor is to transform electrical energy into heat energy. It can also be said that the aluminum shell resistor is an energy-consuming , and the current passes through it to generate internal energy. Resistors usually play a role in dividing voltage and current in a circuit. For signals, both AC and DC signals can pass through resistors.
1. Non-combustible wire-wound aluminum housing resistors 2. High-voltage impact resistance 3. Fast heat dissipation 4. Good short-time overload performance 5. Low noise 6. Resistance value has not changed over the years 7. Error range: ±5%, ± 2%, ±1% 8. Power range: 5W ~ 1000W
Applications:
Power supply, inverter, servo and high-demand harsh environment use, long life. Resistance tolerance is 10%, 5%, 3%, 2%, 1%, 0.5%. And can be assembled according to the needs of high-power models. Special resistors can also be made according to customer requirements, and can be combined into high-power or high-power resistor boxes in series.
Aluminum shell resistor manufacturers square wire wound resistors (wire wound resistors), usually called Cement Electric Group, use nickel, chromium, alloy resistance wires in alkaline heat-resistant porcelain pieces, wound iron and other resistance, external heat, humidity , No corrosion and protective materials, again ceramic package, especially non-flame cement filler sealed. Their advantages are resistance accuracy, low noise, good heat dissipation, and may consume a lot of power. They are mainly used for the power level of the amplifier. The disadvantage is that the resistance is not large and the cost is high, but it is not suitable for using inductance in high-frequency circuits.
It is mainly used to play the role of step-down, shunt, load, feedback, energy transfer, matching, etc. in low-frequency AC circuits, or to act as absorbers and voltage dividers in power circuits, and can also be used as oscillating circuits and transformers Shunt in attenuation adjustment and pulse forming circuit. In addition, it can also be used for discharge and spark suppression of filter stage capacitors in rectifiers. At the same time, it can be widely used in household appliances, medical equipment, automobile industry, railway, aviation, military equipment and other fields.
The role of aluminum shell:
The role of aluminum in aluminum shell resistors is to cool. The aluminum metal in aluminum shell resistors is a group of atoms formed with a lattice structure, and each atom has a layer (or more) of the shell of electronic components. In the case of electrons, the attraction and flow from the nucleus forms a sea of electrons, enabling the resistance of the metal aluminum shell to conduct electricity. When the potential difference (ie voltage) is applied to the two ends of the metal, because of the electric field, the acceleration of free electrons is affected. But when the free aluminum electrons collide with the lattice, the kinetic energy will suffer loss. In order to release energy, so the form energy, the moving speed of aluminum electrons is the average drift speed, the direction of the opposite direction and the electric field. Due to drift motion, current can be generated. In reality, the arrangement of atomic materials cannot be completely regular, so the way of electron flow will be arranged according to the law of atomic scattering, which is the source of electrical impedance in the aluminum shell.
For detailed electrical product series, please visit EECTECH official website: http://www.eectech.cn
Leave a Reply
Your email address will not be published.Required fields are marked. *