What is a power inductor?

A power inductor is an electromagnetic component used to store energy, usually made of enameled copper wire wound on a magnetic core. In electronic circuits, power inductors can be used for filtering, voltage regulation, current limiting, etc.

How to solder power inductors?

Solder for power inductors is melted and coated on the terminals of power inductors to form a strong electrical connection.

When soldering power inductors, the following points need to be noted:

Choose the right solder. The melting point of the solder should be lower than the heat resistance temperature of the power inductor. Commonly used solder is tin lead solder and lead-free solder. Tin lead solder has a low melting point and good solderability, but it contains lead, which is harmful to the environment and human body. Lead-free solder has a higher melting point and poor solderability, but it is harmless to the environment and human body.

Get the soldering tool ready. Soldering tools include soldering iron, soldering wire, soldering paste, flux, etc. The power of the soldering iron should be appropriate, generally 25W-60W. The diameter of the solder wire should match the size of the soldering iron head. The solder paste can improve the fluidity of the solder, and the flux can remove the oxide on the surface of the solder and improve the solder property.

Clean terminals of power inductors. The terminal surface of the power inductor may oxidize, affecting the solderability. You can use sandpaper or alcohol to wipe the surface of the terminal to remove oxides.

Solder. Heat the soldering iron to a suitable temperature, dip the solder wire, and coat the terminal of the power inductor with solder. The solder should evenly cover the surface of the terminal to form a smooth solder joint.

Cool the solder joints. After the solder is melted, it needs to wait for it to cool and cure. Cold air or natural cooling can be used.

The specific soldering steps are as follows:

Heat the soldering iron to the right temperature.

Dip the solder wire and apply a layer of solder to the solder paste.

Place the soldering tip on the terminal of the power inductor and heat the terminal.

When the terminal temperature rises, put the solder wire close to the terminal, and the solder will melt and flow to the terminal.

Remove the soldering iron and wait for the solder joint to cool and cure.

When soldering power inductors, note the following:

The temperature of the soldering iron should not be too high, otherwise it may damage the power inductor.

The amount of solder should not be too much, otherwise it may cause solder joints or short circuit.

After soldering, check whether the solder joint is firm, and if necessary, repair can be carried out.

Here are some common problems with solder power inductors:

Solder joint welding: solder joint is not firm, easy to fall off. The reason may be that the soldering iron temperature is too low, the amount of solder is insufficient, or the terminal is not clean.

Solder joint short circuit: Two or more solder joints are connected, resulting in short circuit. The cause may be too much solder or uneven solder.

Solder joint cold welding: the surface of the solder joint is not smooth, and it is granular. The cause may be too low a soldering iron temperature or solder oxidation.

Juyeda for the above characteristics, developed the FW-3007S automatic inductive soldering machine, high-precision displacement and fast output speed can improve production and save manpower, welcome to contact us.