Electromagnetic actuator


An actuator that uses electromagnetic force.

Magnet and coil winding are the major element for micro-electromagnetic actuators. For sub-milimeter or smaller magnetic rotors for micro-electromagnetic devices, thin film magnets fabricated by sputtering are useful. High-energy products and larger thickness are needed for the thin film magnets in order to raise the power of the devices. On the other hand, research into devices based on electromagnetic force focuses on those with plane structures such as axial gap types, because it is difficult to wind the coil around the cylindrical stator used for radial gap type microdevices. With regard to efficiency, radial gap types have an advantage, but an appropriate process for winding the coil around the cylindrical stator must be developed.


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