RADIAL MAGNETIC BEARING AND BLOWER

To downsize a radial magnetic bearing while maintaining suction force.SOLUTION: A radial magnetic bearing 10 for supporting a rotating body 2 in a non-contact manner from an outside in a radial direction comprises a plurality of electromagnets 11 provided opposite to the rotating body 2 to generate a magnetic flux for supporting the rotating body 2. Each of the plurality of electromagnets 11 comprises: back yoke parts 14 and 15; a pair of magnetic pole teeth parts 16 and 17 that constitutes a magnetic path together with the back yoke parts 14 and 15 and the rotating body 2; and coils 18 and 19 wound around the pair of magnetic pole teeth parts 16 and 17, respectively. The pair of magnetic pole teeth parts 16 and 17 each comprises: base parts 16a and 17a extending from the back yoke parts 14 and 15 toward the rotating body 2 so that a distance between the pair of magnetic pole teeth parts 16 and 17 is decreased; and leading end parts 16b and 17b extending from the base parts 16a and 17a toward the rotating body 2 so that the distance between the pair of magnetic pole teeth parts 16 and 17 is increased or kept.SELECTED DRAWING: Figure 2 【課題】吸引力を維持しつつラジアル磁気軸受を小型化する。【解決手段】回転体２を径方向外側から非接触で支持するためのラジアル磁気軸受１０は、回転体２に対向して設けられ、回転体２を支持するための磁束を発生させる複数の電磁石１１を備える。複数の電磁石１１は、それぞれ、バックヨーク部１４，１５と、バックヨーク部１４，１５および回転体２と併せて磁路を構成する一対の磁極ティース部１６，１７と、一対の磁極ティース部１６，１７のそれぞれに巻回されたコイル１８，１９とを有する。一対の磁極ティース部１６，１７は、それぞれ、バックヨーク部１４，１５から回転体２に向かって一対の磁極ティース部１６，１７の間隔が狭まるように延びる基部１６ａ，１７ａと、基部１６ａ，１７ａから回転体２に向かって一対の磁極ティース部１６，１７の間隔が広がり、または維持されるように延びる先端部１６ｂ，１７ｂとを有する。【選択図】図２