Linear motor or alternator plunger configuration using variable magnetic properties for center row and outer rows of magnets

摘要

The apparatus pertains to an electromagnetic reciprocating machine with a stator having end portions forming axially spaced-apart pole pieces, the stator further including a coil cavity. A plunger reciprocates within the stator and includes a central portion and two end portions. The magnetic strength of the end portions is different from the magnetic strength of the central portion.