Stator, motor, and generator
A stator is provided which includes two or more kinds of soft magnetic materials having different magnetic properties. Moreover, a stator is provided which further includes a plurality of pole portions, in which at least one of the plurality of pole portions includes a soft magnetic material different from the other pole portion, and a motor and a generator are provided which include any of the stators, and a rotor.
1 . A stator comprising:
a stator core configured of blocks divided in a circumferential direction in cross sections including a rotation axis and passing through centers of pole portions each located between two slots having different phases from each other,
wherein
the stator core is evenly divided into six blocks in the circumferential direction, wherein each of the six divided blocks is configured of an inner block and an outer block located outside the inner block,
each of the inner blocks couples a plurality of the pole portions located between two slots having the same phase, and
at least one of the plurality of inner blocks and the plurality of outer blocks is constituted of a soft magnetic material different from the other blocks, and the stator core is evenly divided in the circumferential direction between different phases.
2 . The stator according to claim 1 , wherein the stator core includes two or more kinds of the soft magnetic materials having different magnetic properties.
3 . The stator according to claim 1 , wherein the soft magnetic material is a Ni—Fe alloy.
4 . The stator according to claim 1 , wherein the soft magnetic material is a permalloy.
5 . The stator according to claim 2 , further comprising:
the plurality of pole portions, wherein
at least one of the plurality of pole portions comprises a soft magnetic material different from the other pole portion.
6 . The stator according to claim 5 , wherein a relative permeability of the at least one pole portion is lower than a relative permeability of the other pole portion.
7 . The stator according to claim 5 , wherein the plurality of pole portions has the same shape.
8 . The stator according to claim 6 , further comprising a yoke portion configured to support the plurality of pole portions, wherein
at least a part of a section from each of the plurality of pole portions to the yoke portion is configured of the soft magnetic material different from other section.
9 . The stator according to claim 2 , wherein
letting the number of slots of the stator be N, the number of phases be m, and the number of poles be P, a value of the number of slots per pole per phase q obtained by an equation: q=N/(m·P) is equal to or less than one,
the stator further comprises a yoke portion configured to support the plurality of pole portions,
the plurality of pole portions includes a first pole portion provided between windings having the same phase, and
at least a part of a section from the first pole portion to the yoke portion located radially outside the first pole portion comprises a soft magnetic material different from the other section.
10 . A motor or generator comprising:
the stator according to claim 1 ; and
a rotor.