| 摘要 |
Magnetic actuator having a closed magnetic circuit (26) capable of guiding a magnetic flux. The magnetic circuit (26) comprises a fixed magnetic part (30, 31, 32) with a yoke (30) and a mobile part (22), magnetically connected to each other and also at least one main air gap (29) delimited by at least one portion (28) of the mobile part (22) and by the yoke (30). In the main air gap (29), the flux is closed by being set up approximately transverse to the mobile part (22). The fixed part (30, 31, 32) also comprises flux recuperation means (40) that contribute with the mobile part (22) to delimiting an auxiliary air gap (38) in which the magnetic flux is set up laterally to the mobile part (22). The flux is contained on each side of the main air gap (29), on one side by the yoke (30), and on the other side jointly by the mobile part (22) and the flux recuperation means (40) through the part (28) contributing to delimiting the main air gap (29). The auxiliary air gap (38) has a dimension in the direction in which magnetic flux is set up that is minimum in at least one area of the portion (28) contributing to delimiting the main air gap (29).
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