Definition of electromagnet:

An electromagnet (solenoid) refers to a coil that is usually a long cylindrical shape. When current passes through it, it can act as a magnet, pulling the movable core into the coil. A simpler definition is that an electromagnet is composed of a coil and a movable iron core, used to convert electrical energy into mechanical energy. The emergence of electromagnets has a history of decades. The current electromagnetic products have a wide range of sizes, with diameters ranging from less than 4mm to over 400mm, and force outputs ranging from less than 10g to up to one ton.

Characteristics of linear electromagnets:

Linear electromagnets provide linear strokes, typically less than one inch in either direction. Linear electromagnets can be unidirectional or bidirectional. Linear electromagnets are usually divided into two types: pull type and push type: pull type refers to the electromagnetic force that pulls the punch into the electromagnet body; Push type refers to the electromagnetic iron box where the punch/shaft is pushed out. Many come with return springs to pull the punch or punch back to its original position with the shaft. Linear electromagnets have a simple structure and are inexpensive. There are various types, sizes, and constructions of linear solenoids