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Rotor and motor

A technology of rotor and rotor core, applied in the direction of magnetic circuit rotating parts, magnetic circuit shape/style/structure, electric components, etc., can solve the problems of magnetic characteristic reduction, magnetic flux short circuit, etc.

Active Publication Date: 2022-07-01
NIDEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the magnetic flux is short-circuited, causing a problem that the magnetic properties are degraded

Method used

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  • Rotor and motor
  • Rotor and motor
  • Rotor and motor

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Embodiment Construction

[0021] The Z-axis direction appropriately shown in each drawing is an up-down direction in which the positive side is the upper side and the negative side is the lower side. The central axis J appropriately shown in each drawing is an imaginary line extending in the vertical direction parallel to the Z-axis direction. In the following description, the direction parallel to the axial direction of the central axis J, that is, the vertical direction is simply referred to as the "axial direction", the radial direction centered on the central axis J is simply referred to as the "radial direction", and the central axis J is referred to as "radial direction". The circumferential direction as the center is simply referred to as "circumferential direction". In the present embodiment, the upper side corresponds to one side in the axial direction, and the lower side corresponds to the other side in the axial direction. In addition, the vertical direction, the upper side, and the lower s...

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PUM

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Abstract

A rotor and a motor are provided. The rotor includes a plurality of magnets and a rotor iron core. The rotor iron core is composed of a plurality of thin-plate iron cores stacked in the axial direction and has a plurality of magnet holes in which magnets are arranged. The rotor core has a first sheet iron core and a second sheet iron core. The first thin-plate iron core has an annular first inner plate portion, a plurality of first outer plate portions, a plurality of first inner connecting portions, and a first outer connecting portion. The second thin-plate iron core has an annular second inner plate portion, a plurality of second outer plate portions, and at least one second inner connecting portion. The second thin-plate iron cores are stacked in the axial direction, and are sandwiched by a pair of first thin-plate iron cores from both sides in the axial direction. A first thin-plate iron core is further stacked in the axial direction on one of the pair of first thin-plate iron cores. The first outer connecting portion is radially opposed to or in contact with the magnet.

Description

technical field [0001] The present invention relates to rotors and motors. Background technique [0002] Conventionally, a motor including a spoke-type rotor is known (for example, Patent Document 1). [0003] Such a rotor is, for example, an integrated laminated rotor having an integrated thin-plate iron core. The integrated thin-plate iron core has an annular connecting portion and a plurality of thin-plate iron core pieces. The plurality of thin-plate iron core pieces are arranged in the circumferential direction on the outer peripheral side of the annular connecting portion. Each of the thin-plate core pieces is connected to the annular connecting portion via the support portion. Each of the thin-plate core pieces is arranged at a predetermined position of the laminated structure of the plurality of thin-plate core pieces, and is connected to the thin-plate core pieces. Permanent magnets are arranged between adjacent thin-plate iron core portions. [0004] Patent Do...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/22H02K1/28H02K3/50H02K11/215
CPCH02K1/22H02K1/28H02K3/50H02K11/215H02K1/2773H02K2201/09H02K2201/06
Inventor 白石刚士千木良徹北垣宏青野真乡
Owner NIDEC CORP