Good/Bad Judgment: The reading for the surface-mounted inductor should be zero at this point. If the multimeter reading is excessively high or infinite, it indicates that the inductor is damaged. For inductor coils with more turns and finer wire, the reading can reach dozens to hundreds. Typically, the DC resistance of the coil is only a few ohms. Damage is manifested as overheating or the inductor's magnetic ring being visibly damaged. If the inductor coil is not severely damaged but cannot be determined, use an inductor meter to measure its inductance or use the substitution method to judge. Inductor components, their cores and windings are prone to inductance changes due to temperature rise effects. Note that the body temperature must be within the operating specifications.


Current-limiting Inductors: Current-limiting inductors refer to inductive coils used in circuits to block the path of alternating current. The production process of surface mount inductors is divided into high-frequency current-limiting inductors and low-frequency current-limiting inductors. 1. High-frequency current-limiting inductors: Also known as high-frequency choking inductors, they are used to prevent high-frequency alternating current from passing through. High-frequency current-limiting inductors operate in high-frequency circuits, often using hollow or ferrite high-frequency cores, with the frame made of ceramic material or plastic. Inductor manufacturers, the coils are wound in a segmented manner or multi-layer flat winding. Tongyou Intelligent Equipment (Jiangsu) Co., Ltd. Tongyou Intelligent Equipment (Jiangsu) Co., Ltd.


The function of SMD inductors: Simply put, it allows DC and blocks AC. It isolates AC signals, filters them, or forms resonant circuits with capacitors, resistors, etc. The role of tuning and selecting frequency in inductors: Inductor coils in parallel with capacitors can form an LC tuning circuit. Any current through a SMD inductor generates a magnetic field, which in turn acts on the circuit. When the current through the SMD inductor changes, the generated DC voltage potential in the inductor will prevent the current from changing.


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