| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that a cogging phenomenon that the rotation is not smooth is generated by a big change of magnetic attraction between a stator and a rotor having different magnetic flux densities according to positions in an outer circumferential direction, in a rotating machine having a magnetic pole part 2 in which permanent magnets 5 are radially arranged around the rotating shaft in such a manner that the magnets of the same polarity face each other and clearances between the permanent magnets are filled with a laminated magnetic material (for example, a magnetic steel sheet), and also having the nonmagnetic parts in which the outer and an inner circumferential sides (including a peripheral part of the rotating shaft) are filled with a nonmagnetic material (for example, aluminum). SOLUTION: The permanent magnets 5 are arranged so as to be inclined to a rotor shaft direction in a circumferential direction. Since they are arranged so as to be inclined in the a circumferential direction, even when a circumferential position of the rotor 1 is changed, the magnetic flux density is not changed so much. As a result, the cogging phenomenon is suppressed.
|
