Dynetics - Nippon Pulse Linear Shaft Motor - The Next Generation Actuator

Описание: Nippon Pulse's family of Linear Shaft Motors are the next generation linear brushless motor. When reliability, zero maintenance, zero cogging and precision are paramount, the Linear Shaft Motors from Nippon Pulse are an ideal component choice, offering the user uncompromised performance, ease of use, compact package size and high value.

What is a Linear Shaft Motor?
The Linear Shaft Motor is a high precision direct drive linear servomotor consisting of a shaft of rare Earth-Iron-Boron Permanent Neodymium Magnets and a “forcer” of cylindrically wound coils which can be supplied with optional Hall effect devices. The shaft supplies the magnetic field which the forcer acts upon. The forcer assembly, combined with the amplifier and control electronics, produces the force for the motor. The Hall effect devices can be supplied, if they are required by your selected servo driver for proper commutation of a brushless linear motor, and are integrated into the forcer assembly.

The Linear Shaft Motor was designed with three basic design concepts:
Simple - High Precision - Non Contact -

Linear Shaft Motors are simple. They consist of only two parts, a magnetic shaft and a “forcer” of cylindrically wound coils.

Linear Shaft Motors provide ultra-high precision. They have no iron in the forcer or shaft for precision and zero cogging. The coils of the Linear Shaft Motor form the core, providing the stiffness expected in an iron-core motor.

Linear Shaft Motors are non-contact. Since the coil completely wraps around the magnets, all the magnetic flux is efficiently used. This allows for a large (0.5 to 5.0mm) 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.

Basic Structure of a Linear Shaft Motor
The magnetic structure of the Shaft is built in such a manner that there is no space between each magnet; it is fully supported within itself. The magnetic structure is then inserted into a protective stainless-steel tube. This process is protected by numerous patents. This patented process produces a very strong magnetic field twice that of other linear motors.

Features of Linear Shaft Motors
• Capable of high thrust (up to 100,000N)
• Quiet — due to the absence of friction, the only mechanical contact section is the linear guide
(Fully non-contact operation is possible using an air slider)
• Simplified unit construction allows a stroke of up to 4.6 meters
• High precision (0.07nm)
• High speed drive (greater than 10m/s) with acceleration up to 20G
• Low speed drive (8μm/s)
• Allows for parallel drive using only one encoder and one driver
• Virtually no speed fluctuation (±0.006% at 100mm/s)
• Durable construction, capable of operation even underwater or in a vacuum

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