Rotor core, rotor, and rotating electrical machine
AssigneeNippon Steel Corporation
InventorsYasuo OHSUGI, Rei HONMA
Life of this patent
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Abstract
A rotor core has plural holes including holes in which permanent magnets are installed, the rotor core including: a high permeability portion; and a low permeability portion having a relative permeability that is smaller than a relative permeability of the high permeability portion and that is greater than a relative permeability of a vacuum, wherein an entirety of an inner peripheral bridge portion, at least part of a region of which is disposed at an inner peripheral surface side of the rotor core relative to at least one of regions where the permanent magnets are installed, is the low permeability portion.
Claims18
A rotor core having plural holes including holes in which permanent magnets are installed, the rotor core comprising:
- a high permeability portion;
- and
- a low permeability portion having a relative permeability that is smaller than a relative permeability of the high permeability portion and that is greater than a relative permeability of a vacuum,
- wherein an entirety of an inner peripheral bridge portion, at least part of a region of which is disposed at an inner peripheral surface side of the rotor core relative to at least one of regions where the permanent magnets are installed, is the low permeability portion.
A rotor core having plural holes including holes in which permanent magnets are installed, the rotor core comprising:
- a high permeability portion;
- and
- a low permeability portion having a relative permeability that is smaller than a relative permeability of the high permeability portion and that is greater than a relative permeability of a vacuum,
- wherein part of a first outer peripheral bridge portion, which is disposed at a region configuring one pole of the rotor core and at a leading side in a rotational direction relative to a circumferential direction center of the region, and at least part of a region of which is disposed at an outer peripheral surface side of the rotor core relative to at least one of regions where the permanent magnets are installed, is the low permeability portion.
Dependencies are inferred from the claim text.