A moving magnet actuator is a type of electromagnetic linear actuator.
[1] It typically consists of an arrangement of a mobile permanent magnet and fixed coil, arranged so that currents in the coil generate a pair of equal and opposite forces between the coil and magnet.
A voice coil actuator, also called a voice coil motor (VCM), is an electromagnetic linear actuator where the magnet is fixed and the coil is mobile.
In this configuration the coil is common called a voice coil.
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