ELECTROMAGNETIC ACTUATOR WITH IMPROVED FORCE DENSITY AND APPLICATION TO AN ELECTRIC RAZOR

摘要

The invention relates to an electromagnetic actuator comprising a stator assembly (2) having N poles of the same width LP and at least one coil (3) surrounding one of said poles (7b), with N≥3, and a magnetic part (8). ) movable, relative to the stator assembly (2), in a direction of relative displacement and on a stroke C, and comprising N + 1 magnetized zones (4a, 4b, 5a, 5b) having magnetizations perpendicular to the direction of displacement relative and alternate meanings. According to the invention, the magnetic part (8) comprises a yoke (6) closing the magnetic flux passing through the magnetized zones, the stroke C of the magnetic part (8) being less than or equal to the width LP of each pole, and the thickness of the magnetized zones, perpendicular to the direction of movement, being less than the stroke C of the magnetic part (8).