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AssigneesMitsuba Corporation, Honda Motor Co., Ltd.
InventorsYosuke FUJII, Tohru YUMOTO, Taichi YAMAMOTO, Susumu MIYAZAKI
Estimating the term…
A rotor includes a rotary shaft having a non-magnetic body, a plurality of rotor cores, and a plurality of permanent magnets disposed between the plurality of rotor cores, wherein a concave section extending in an axial direction is formed in any one of the non-magnetic body and a base end of the rotor core, and a convex section fitted into the concave section is formed at the other, the concave section is formed by a key groove section and a dovetail groove section in communication with each other, the convex section is formed by a key section configured to fit into the key groove section and a dovetail protrusion configured to fit into the dovetail groove section, the key section and the dovetail protrusion being integrally formed with each other, and a gap is formed between the dovetail groove section and the dovetail protrusion in the circumferential direction.
A rotor comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
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Having a flux concentration effect: consisting of tangentially magnetized radial magnets
Rotor cores with permanent magnets: inner rotors
Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]: having a flux concentration effect
Dynamo-electric machines
Term end not estimated
Priority is claimed on Japanese Patent Application Nos. 2016-092772, 2016-092773 and 2016-092774, which are filed May 2, 2016, the contents of which are incorporated herein by reference.
The present invention relates to a rotor and a motor.
In the related art, an interior permanent magnet (IPM) motor in which permanent magnets are imbedded in a magnetic rotor core that constitutes a rotor is known as a type of a motor. In such a motor, since a magnetic body (a rotor core) is between the permanent magnets neighboring in a circumferential direction, a quantity of magnetic flux, which bypasses the rotor core side among the quantity of magnetic flux from the permanent magnet, is increased and as a result, a leakage flux is increased. For this reason, the magnetic flux interlinked with a winding wound on the stator may be reduced, and there is a possibility that the motor properties are decreased. Accordingly, various technologies for preventing deterioration in motor properties in an IPM motor have been disclosed.
FIG. 1 is a schematic configuration view of a brushless motor according to a first embodiment of an aspect of the present invention.
FIG. 2 is an enlarged view of a portion A of FIG. 1.
FIG. 3 is an enlarged view of a portion B of FIG. 2.
Next, embodiments of aspects of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic configuration view of a brushless motor 1.
As shown in FIG. 1, the brushless motor 1 is a so-called inner rotor. The brushless motor 1 has a stator 2 and a rotor 3 rotatably disposed inside the stator 2 in a radial direction.