Beckhoff AL8000 Operating Instructions Manual page 27

Technical data
Magnetic attractive force F [N]
a
Attractive force between magnetic plate and coil part. Exists even
when no current is flowing. Increases with the size of the coil part
and depends on the size of the air gap. See Chapter "Air gap",
[Page 70]. Increases by up to 10% when the peak current is
reached
Continuous power dissipation P [W]
c
Maximum power dissipation of the linear motor. Can be used for the
calculation of the cooling systems.
Pole pair distance [mm]
Distance across a pole pair, north pole and south pole, of the mag-
netic plate.
Air gap [mm]
Distance between magnetic plate and coil part. Must be observed
during assembly to achieve the specified values of the linear motor.
Version: 1.7 AL8000 ─── 27