Linear actuator

A linear actuator is provided with a coil section and a shaft section. The coil section has a plurality of coils wherein alternating currents in phases different from each other flow. The shaft section passes inside the coils. The shaft section is provided with a plurality of permanent magnets and a...

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Bibliographic Details
Main Authors HIRATA KATSUHIRO, NOZAWA TAKAKATSU, ISHIGURO HIROSHI, HIURA RYOTA, NAKATA YOSHIHIRO
Format Patent
LanguageChinese
English
Published 14.09.2011
Subjects
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
DYNAMO-ELECTRIC MACHINES
ELECTRICITY
GENERATION
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Summary:A linear actuator is provided with a coil section and a shaft section. The coil section has a plurality of coils wherein alternating currents in phases different from each other flow. The shaft section passes inside the coils. The shaft section is provided with a plurality of permanent magnets and a plurality of intermediate members. The permanent magnets face each other with opposite magnetization directions with respect to the direction of a center axis (C) and are arranged along the center axis (C). The intermediate members are arranged between the permanent magnets, respectively. In order to lead out each magnetic flux of the permanent magnets to the outside, the intermediate members are composed of a soft magnetic material having a relatively high saturation magnetic flux density or a permanent magnet magnetized in the direction perpendicular to the axis.
Bibliography:Application Number: CN20098141588