LINEAR ACTUATOR HAVING TWO INDEPENDENT MOBILES AND AN OPTIMIZED CONFIGURATION OF PERMANENT MAGNETS

摘要

The invention has a linear electromagnetic actuator comprising a stator (1), at least one electric coil (5) and two ferromagnetic stator poles (14, 15) located axially on either side of the coil (5) and that two movable masses (6, 7) independent moving along axes parallel between said stator poles (14, 15) within said coil (5), each of said movable masses (6, 7) being formed of a ferromagnetic material, said movable masses (6, 7) being each surrounded by a fixed magnetized envelope constituted by at least one permanent magnet, said magnetic envelope extending over a tubular sector of less than 360 °, each of said envelopes defining a non-magnetized zone directed towards the non-magnetized zone of the other envelope, said non-magnetized zones being symmetrical with respect to the median plane (M) passing through said parallel axes.