Here are some ways to prevent common faults of inductors:

-Reasonable selection

-Select the appropriate inductor type according to the operating frequency, current and voltage of the circuit. For example, in high-frequency circuits, inductors with good high-frequency characteristics should be selected, such as air-core inductors or high-frequency ferrite core inductors; For high current application scenarios, power inductors that can withstand the corresponding current should be selected.

-Consider the temperature coefficient and quality factor (Q value) of the inductor. If the circuit is sensitive to temperature changes, it is necessary to choose an inductor with good temperature stability; For circuits that require high signal quality, choose inductors with higher Q value.

-circuit design optimization

-Reasonably design the layout of inductors in the circuit to avoid unnecessary electromagnetic coupling between inductors and between inductors and other components. For example, keep the inductor at a certain distance from sensitive signal lines, or adopt shielding measures to reduce electromagnetic interference.

-When designing the power supply circuit, it is necessary to ensure that the rated current and withstand voltage of the inductor can meet the maximum requirements of the circuit, and a certain safety margin is reserved. It is generally recommended to reserve a margin of 20%-30%.

-Quality control

-For the production and manufacture of inductors, the quality of winding process should be ensured, and the coil turns should be accurate, tight and even. At the same time, the quality of enameled wire should be strictly checked to ensure its good insulation performance and avoid the hidden danger of turn-to-turn short circuit.

-Strictly screen the magnetic core to ensure that its performance meets the requirements, such as magnetic permeability, loss and other parameters within the specified range. In the assembly process, it is necessary to ensure that the magnetic core and the coil are well matched to avoid looseness or damage.

-Correct installation

-When installing the inductor, operate it in the specified way to avoid mechanical damage to the inductor. For example, for the plug-in inductor, make sure that the pin is inserted into the hole of the circuit board correctly and welded well; For patch inductors, appropriate mounting equipment should be used to ensure accurate mounting position and firm welding.

-Pay attention to the heat dissipation condition of the inductor during installation. If the inductor will generate more heat during operation, make sure it has enough heat dissipation space, or consider adding cooling fins and other auxiliary heat dissipation measures.

-Environmental control

-Try to make the inductor work in a suitable temperature, humidity and cleanliness environment. For example, avoid the inductor being exposed to high temperature, high humidity or corrosive gas for a long time. If it is unavoidable, corresponding protective measures can be taken, such as using a sealed shell or adding desiccant.

-Protect the inductor from mechanical vibration and shock. For some devices working in vibration environment, such as inductors in automotive electronic equipment, damping measures can be adopted, such as using rubber pads or damping brackets to fix the inductors.

-Regular inspection and maintenance

-Inspect the appearance of the inductor regularly to see if there are any signs of physical damage, such as whether the coil is broken, whether the magnetic core is broken, etc. At the same time, check whether the pins or solder joints of the inductor are loose and corroded.

-For the inductors in some key circuits that run for a long time, professional test equipment can be used to measure the inductance, Q value and other parameters of the inductors regularly, so as to find out the performance degradation in time and take corresponding measures, such as replacing the inductors or adjusting the circuit parameters.