Product Details

What is a magnet coil?

A magnet coil consists of a conductive winding, usually copper or aluminium wire, wound in the shape of a spiral, coil or helix. A magnetic field is created when an electric current is passed through the conductive winding, like-wise an electric current can be created when the coil interacts with a magnetic field. The magnetic field that circles each loop of wire combines with the fields from the other loops. This is to produce a concentrated field down the center of the coil. The magnetic field is essentially uniform down the length of the coil when it is wound tighter.

Magnet Coil

A coil’s magnetic field strength increases with increasing current. It also increases with each loop that is added to the coil. A solenoid, which is a long, straight coil of wire can be used to generate a nearly uniform magnetic field similar to that of a bar magnet. The concentrated magnetic field inside a coil is highly useful in magnetising ferromagnetic materials for inspection using the magnetic particle testing method. However, it is important to note and be aware that the field outside the coil is weak and is not suitable for magnetizing ferromagnetic materials.

Magnet coils are employed in various applications including electromagnets, motors and generators.

How to order

Express Transformers & Controls (2015) Limited can manufacture coils to suit the customer’s requirements. Magnet coils can be wound using traditional magnet wire or copper foil for higher current applications.

These can then be mounted or encapsulated to suit the equipment or environment into which they are going to be placed.

Examples of our work can be seen in the gallery.

Please feel free to contact us to discuss your design requirements. Our lead engineer details are listed below and they are very happy to discuss your particular project needs with you.