| 摘要 |
PROBLEM TO BE SOLVED: To obtain a plane opposed brushless motor in which an eddy-current loss inside a stator yoke can be reduced while a magnetic attractive force acting across a rotor part and a stator part is being maintained by a method wherein insulating materials and magnetic materials are formed in a plane direction so as to be formed as layers alternately. SOLUTION: A stator yoke 11 is formed of magnetic materials 15 such as, e.g. flat-rolled silicon steel sheets or the like and of insulating materials 16 such as, e.g. polymide films or the like so as to be formed as layers alternately. By this constitution, a resistance in a direction at right angles to a magnetic flux which is changed by the rotation of a rotor part can be increased, an eddy current which is generated inside the stator yoke 11 is reduced, and an eddy-current loss can be reduced. In addition, the generated eddy current does not generate eddies whose magnitude is the width or higher of every layer of the magnetic materials 15. When the width of every layer of the magnetic materials 15 is made narrow, the eddies of the eddy current can be reduced. In addition, since the stator yoke 11 is formed mainly of the magnetic materials 15, it is possible to reduce an eddy-current loss inside the stator yoke 11 while a magnetic attractive force is being maintained. |
