The linear motor with permanent magnets is virtually a multi-pole synchronous motor with permanent magnets where the rotor as well as the stator are unfolded onto the plane. The motor does not make a rotational movement but an advance movement.
The application determines which part of the machine is a fixed, stationary part, which part is a moving part, and which part is powered. The stator is usually extended along the entire length of the travel path. The rotor covers a small part and is situated on a movable part of the structure. The powered part always consists of a packet of electrical ferromagnetic laminations and a three-phase winding. A part (steel plate) with bonded rare-earth permanent magnets is situated opposite the powered part. Current flowing through the powered part generates a magnetic field and its interaction with the magnetic field of permanent magnets results in action of forces that move the device. High demands are put on the moving part in the form of the inconvenient necessity to provide movable inlets for power, cooling (water), or wires to position sensors. However, it all depends on the machine design.
We customer manufacture parts of linear drives with permanent magnets in pieces or in batches. We focus on special applications having a high demand for the design quality. In our own testing laboratory, we test magnetic properties of individual magnets as well as the entire finished assembly.