Electric motor

Abstract

With an electric motor formed according to a prior art, there is a relatively large amount of magnetic flux leaking between an armature and a secondary, resulting in a problem that an electric current is large but a desired output is small. In addition, since a magnetic attraction acts only in one direction between the armature and the secondary, there is a relatively large load on the support structures of the secondary, causing a distortion in the motor structure and some other disadvantages. In order to solve the above problems, the present invention provides an improved electric motor comprising an armature having a core formed by a magnetic material and having a coil wound around the core; and a secondary disposed within the armature with a clearance formed therebetween and supported to be relatively movable with respect to the armature.

Dependencies are inferred from the claim text.