According to the principle, each type of motor which can be realised as a rotary electric motor can also be realised as a linear motor in an elongated arrangement. In their usual design as a synchronous motor or an asynchronous motor, a linear motor is only made up of two parts, a coil package and a secondary part. There are flat and cylindrically-designed magnet-operated linear motors which are air-cooled and water-cooled. These have different management systems and form the drive for the translatory direct drive. In a way which involves low levels of wear and tear and oscillation, they allow the direct supply of power to longitudinally-moving machine parts, without the prior conversion of a rotating motion.