BECKHOFF AL2000 User Manual
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Linear motor, schematic cross section:
In a linear motor several coils are mounted in a slide, or coil unit. The slide is movable over a bottom plate. On
the entire distance this plate is covered with permanent magnets. The plate, included with the magnet assem-
bly, is called the magnetplate. The length of the magnetplate determines the reach of the linear motor.
The linear motor type discussed in this leaflet has coils with an iron core (see following figure ). These cores
that act like magnets are called ‘the teeth’. The coils are supplied with an electric current
The slide is propelled by changing the current phase of each coil. The speed of change allows control of the
velocity of the slide. In addition, the amperage of the current is linked to the moving force. So, in- or decreasing
the amperage allows control of the motorforce.
Coil unit with three coils, schematic: