What is an inductor, and what are the methods to identify its quality? 5

7、 Inductors are commonly used in electronic components, mainly for storing electrical energy and filtering. However, during use, there may be situations where inductors fail or malfunction. Below are several methods for distinguishing the quality of inductors.diode

1. Appearance inspection method

The appearance inspection method is the simplest and most intuitive way to distinguish the quality of inductors. Firstly, check the appearance of the inductor for any damage, deformation, or oxidation, as well as any welding defects or fractures. If the appearance of the inductor is intact, its parameter values and specifications can be determined by observing the color, markings, and other information of the inductor to determine whether it meets the requirements.

2. Resistance measurement method

The resistance measurement method is a simple and effective way to distinguish the quality of inductors. Connect the test heads of the multimeter to both ends of the inductor and measure the resistance value of the inductor. If the resistance value of the inductor is close to zero, it indicates that the inductor may have a short circuit; If the resistance value is infinitely large, it indicates that the inductor may have an open circuit; If the resistance value is unstable, it indicates that the inductor may have poor contact or internal open circuit.diode

3. Inductive measurement method

Inductance measurement method is an accurate and comprehensive way to distinguish the quality of inductors. Specialized inductance measuring instruments can be used to measure parameters such as inductance value, quality factor, impedance, etc. of inductors. If the inductance value of the inductor is too low or too high, it indicates that the inductor may be damaged or aged; If the quality factor is low, it indicates that the inductor may have iron core saturation, coil damage, and other conditions.diode