Large-scale power equipment, medical equipment, electrical equipment and other products often need to absorb some of the excess power generated during use. The high-power energy-consuming resistor used here is the load resistance. Load resistance is also called discharge resistance, brake resistance, brake resistance, and absorption resistance due to its special function.

This type of resistance has high power and is generally a non-inductive power resistance. Non-inductance and ultra-low inductance are important requirements for this type of product. During the process of absorbing power and discharging excess electricity, if the inductance value of the resistor is too large, it will easily cause oscillations, which will affect other components in the loop, power supply and The equipment itself causes damage, and even directly burns out many internal components.

produce

Discharge resistance, load resistance In the production process, the subject to consider is the non-inductive performance and heat dissipation performance of the product. Non-inductive performance As mentioned above, the heat dissipation performance is due to the discharge, and the absorption of power will cause the resistor itself to generate a lot of heat, and the temperature will rise rapidly. Therefore, it is necessary to ensure that the product has good heat dissipation performance on the material. It is best to use heat-resistant materials and metal materials on the shell, so that heat can quickly flow to the outside through products such as heat sinks. At the same time, the process requirements are also very strict.

Fake load

Dummy load is a component, component or device that replaces the terminal in a certain circuit (such as an amplifier) ​​or the output port of an electrical appliance, and receives electric power. It is called a dummy load. The most basic requirements for the dummy load are impedance matching and the power it can bear. An informal load usually used temporarily when debugging or testing machine performance.

Dummy load can be divided into resistive load, inductive load, capacitive load and so on.

The false load of the high-frequency transmitting circuit is mainly the frequency allowed, the impedance must be matched, and can withstand the transmitted power.

effect

Resistors are often used as loads to absorb unnecessary electricity generated during the use of the product, or play a role in buffering and braking. In addition, for high-precision resistors, it is not allowed to have high impedance in the product, which requires the selection of high-quality materials and high-demand processes.

Differenceedit

Load is the general term for all electrical appliances. As long as the component can work with electricity, it is the load, and the load resistance is the resistance of the load.

If the load is a pure resistance element, the load resistance can replace the load. If the load is not a pure resistance element (such as a motor or transformer), the load resistance cannot replace the load.