Rotor and surface-magnet-type rotating electrical machine

Abstract

Provided are a rotor capable of reliably holding a permanent magnet while suppressing the detachment of a filament winding layer, and a surface-magnet-type rotating electrical machine using the rotor.The rotor is provided with: a rotor core (5) capable of rotating about an axis (C); a permanent magnet (6) disposed on the outer peripheral surface (51) of the rotor core (5); an end plate (7) formedcoaxially with the axis (C) and covering an end portion in the axial direction of the rotor core (5), the end plate (7) being provided with a recess (71) in which an end portion (61) of the permanentmagnet (6) is disposed, and a radially outer end portion (73) of the end plate (7) being located further outward in the radial direction of the rotor core (5) than an outer peripheral portion (63) ofthe permanent magnet (6); and a filament winding layer (8) that is wound around the outer peripheral portion (63) of the permanent magnet (6).

Description

technical field [0001] The present invention relates to a rotor and a surface magnet type rotating electrical machine. Background technique [0002] Currently, a surface magnet type rotating electric machine in which permanent magnets are mounted on the surface of a rotor core is used. In the rotors used in surface magnet type rotating electrical machines, in order to prevent the magnets from flying and breaking when the rotor rotates, various methods have been proposed to fix the permanent magnets to the rotor core by arranging a winding layer of filaments on the outer peripheral surface of the permanent magnets. technology. [0003] For example, Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2003-111323 ) describes a rotor structure in which permanent magnets are arranged on the outer circumference of a shaft, and the permanent magnets are wound on the shaft by winding layers of filaments and fixed to the shaft. A low-density member having a de...

AI Technical Summary

Problems solved by technology

According to the technology described in Patent Document 1, since the low-density member is arranged at the axial end of the permanent magnet, and the permanent magnet and the low-density member are wound by filament winding layers, even at the end of the permanent magnet At the position where the winding layer of the filament slips (falls off), the holding strength of the permanent magnet is reduced, and only the centrifugal force below the reduced holding strength acts.

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