The Linear Shaft Motor is a simple, high efficiency, high precision motor that requires no maintenance over it’s lifetime. The motor consist of only two parts, a magnetic shaft, and a “forcer” of wound coils. Because it has no iron in the forcer or shaft, giving you the precision and zero cogging expected in a coreless design, the Linear Shaft Motors provide ultra high precision.
The coils of the Linear Shaft Motor form the core, giving you the stiffness expected in an iron cored motor. Because the coil completely wraps around the magnets, all the magnetic flux is efficiently used. This allows for a large (0.5 to 2.5mm) nominal annular air gap. This air gap is non-critical, meaning there is no variation in force as the gap varies over the stroke of the device
The Linear Shaft Motor itself consists of only two parts: the shaft (with magnets) and the forcer (coils).
There is a non-critical air gap, and no physical contact between the shaft and the forcer.
Unlike lead screws with gearheads, the Linear Shaft Motor offers high thrust (up to 20,000 Newtons/4500 pounds) without any gearheads or backlash.
Linear movement resolution as small as 0.07 nanometers is achievable.
Because the magnets in the Linear Shaft Motor are enclosed by a stainless steel shaft, the motor can easily be integrated into various environmental conditions.
• Efficient Use of Magnetic Flux. With the motor coils encircling the magnets, the Linear Shaft Motor uses 100 percent of all
magnetic flux. All magnetic flux created cuts the motor coils at 90 degrees.
• Parallel Drive. The design of the Linear Shaft Motor allows it to be used in a parallel configuration using only one encoder, one
drive, and one amplifier.
• Wide capability. Thrust forces less than 0.5 Newtons and peak thrust forces up to 20,000 Newtons are available. Usable strokes
from 20 mm up to 4.6 meters can be chosen from a number of available models.