The stator has a physical and a constructional function. First it is the closing way for the magnetic
fields and made of magnet iron. Magnet iron is a general name for all kinds of iron that has favorably
properties for magnetic fields. Second the stator gives protection and solidity to the actuator. Next it
has often some possibilities for assembling as screwing holes, assembling shields and sockets. The
bearings of the shaft are also mounted on the stator. The stator has copper windings for generating a
magnetic field in the air gap or generating an magnetic force. The windings can be replaced by
permanent magnets with the same function as the stator windings. For decreasing the magnetical
losses the stator is mostly made as a laminated core structure. In small mechatronic products the
stator is highly integrated with the whole construction.
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