US 2019/0356183 A1 · ROTOR AND MOTOR

Abstract

A rotor includes a rotor core having a cylindrical shape with a central axis as a center thereof and magnets arranged in a circumferential direction. The rotor core includes an inner side core portion positioned farther inward than the magnet in a radial direction, a first outer side core portion positioned farther outward than the magnet in the radial direction and disposed on a first side in an axial direction, and a second outer side core portion positioned farther outward than the magnet in the radial direction and disposed on a second other side in the axial direction. A distance between the central axis and an outer side surface of the first outer side core portion changes in the circumferential direction, a distance between the central axis and an outer side surface of the second outer side core portion changes in the circumferential direction. In a plan view, a first top portion positioned at an outermost position of the first outer side core portion in the radial direction and a second top portion positioned at an outermost position of the second outer side core portion in the radial direction are located at positions different from each other in the circumferential direction.

Claims10

Dependent claims

1-9. (canceled)

A rotor comprising:

a rotating body arranged along a central axis;
wherein
the rotating body includes a rotor core having a cylindrical shape with the central axis as a center thereof and a plurality of magnets arranged in a circumferential direction;
the rotor core includes an inner side core portion positioned farther inward than the magnet in a radial direction, a first outer side core portion positioned farther outward than the magnet in the radial direction and disposed on a first side in an axial direction, and a second outer side core portion positioned farther outward than the magnet in the radial direction and disposed on a second side in the axial direction;
a distance between the central axis and an outer side surface of the first outer side core portion changes in the circumferential direction;
a distance between the central axis and an outer side surface of the second outer side core portion changes in the circumferential direction;
and
in a plan view, positions of a top portion of the outer side surface of the first outer side core portion, which is a farthest distance from the central axis, and a top portion of the second outer side core portion, which is a farthest distance from the central axis, in the circumferential direction are different from each other.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/474,231Filed 22 Dec 2017

Priority

JP 2016-25714728 Dec 2016

Published

21 Nov 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

H02K 1/27
Rotating parts of the magnetic circuit: rotor cores with permanent magnets
H02K 21/16
With magnets rotating within the armatures: having annular armature cores with salient poles
H02K 1/12
Characterised by the shape, form or construction: stationary parts of the magnetic circuit
H02K 1/148
Consisting of a generally annular yoke with salient poles: sectional cores

Rotor and motor

Life of this patent

Rotor and motor

Life of this patent

Abstract

Claims10