Slottless Linear Motors

In slottless motors the coil windings are arranged in the relatively larger air gap between the magnet rail (secondary part) and a flat iron plate. The coil windings are attached to the flat iron base plate and both together are resi-casted to the primary part.

Slottless motors deliver a smooth motion due to the lack of cogging forces inside the magnet unit.

End cogging is suppressed by a special design of the iron base. Owing to the coreless windings and the larger air gap this type of motor has the following application features:

• short electrical time constant (1ms)
• high dynamics in controlled mode
• high speed maximum
• flat design
• relatively small attraction forces
• force output approx. 2.5 to 3 N/cm (air gap area)