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发明授权
US07538456B2 Moving magnet type linear actuator 有权
移动磁铁式线性执行机构

Moving magnet type linear actuator
摘要：
In a moving magnet type linear actuator (10), a stator (30) having an armature (32) including a magnetic iron core (33) fixed on a stator base (31) and an armature winding (34) wound around the magnetic iron core (33); and a movable body (20) having a field permanent magnet (21) arranged oppositely to the magnetic iron core (33) through a magnetic gap and a magnetic holder (22) supporting the field permanent magnet (21) and movably arranged on the stator base (31), the magnetic holder (22) is made of a non-magnetic substance, and a magnetic back yoke (39) is arranged on the side opposite to the armature with respect to the field permanent magnet (22) to from a gap between the magnetic back yoke (39) and the field permanent magnet (21) and is fixed to supporters provided on the stator base (31). In accordance with this configuration, there is provided a moving magnet type linear actuator which can reduce the weight of the movable body to improve the accelerating performance and gives no problem about the life of linear guides.
摘要（中）：

在移动磁体型线性致动器（10）中，具有固定在定子基座（31）上的磁铁（33）的电枢（32）和缠绕在磁铁上的电枢绕组（34）的定子（30） 核心（33）; 以及具有通过磁隙与磁铁芯（33）相对配置的励磁永磁体（21）的移动体（20）和支撑励磁永磁体（21）的可动地配置在定子上的磁性保持架 基座（31），磁性保持架（22）由非磁性物质构成，磁性后轭铁（39）相对于励磁永磁体（22）配置在与电枢相反的一侧，从 磁背轭（39）与励磁永磁体（21）之间的间隙固定在设在定子基座（31）上的支架上。 根据该结构，提供一种移动磁体式线性致动器，其可以减小可移动体的重量，以提高加速性能，并且不会引起线性引导件的使用寿命。

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