As the name suggests, no inductance means no inductance value. Of course, no here means that the inductive reactance value on the resistor is very small and can be ignored. Generally, it cannot be said that it is completely absent. Such non-inductive resistors are often used in some precision instrumentation equipment and electronic industrial equipment, because EBW shunt resistor
with high inductance are prone to oscillation during use and damage other devices in the loop. Non-inductive resistors are often used as loads to absorb unnecessary electricity generated during the use of the product, or to play a role in buffering and braking. Such resistors are often called braking resistors and load resistors. 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.
Common non-inductive resistors are: metal film resistors, wire wound resistors, TO-220 high-power load resistors.
Non-inductive resistor application:
1. Prevent parasitic oscillation in high and medium frequency induction heating equipment
2. Do dummy loads in radio and television transmission equipment
3. In CNC machine tools and wire cutting equipment, where resistance is required without inductive reactance
Considerations for choosing a non-inductive resistor:
The selection always requires the most suitable one. Since we want no inductance, the most important thing is inductive resistance, as well as the consistency and stability of the product. At the same time, when the non-inductive resistor is used as a load, a large amount of heat is generated, and good heat dissipation is an important parameter. If the product has high volume requirements, it is not suitable for large volume such as wire-wound resistors.