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Stator unit, motor, and blower apparatus

A stator unit and stator technology, applied in the field of motors, air supply devices, and stator units, can solve problems such as the influence of rotor rotation characteristics

Pending Publication Date: 2019-11-05
NIDEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the rotor is attached to the stator and driven, the thickness of the cylindrical portion of the cover member covering the stator affects the rotation characteristics of the rotor.

Method used

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  • Stator unit, motor, and blower apparatus
  • Stator unit, motor, and blower apparatus
  • Stator unit, motor, and blower apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings.

[0024] In addition, in this specification, the direction parallel to central axis CA in the air blower 300 is called "axial direction." A direction from a cover 70 described later to one axial side of a shaft holder 11 described later in the axial direction is referred to as "axially upward". The direction from the shaft holder 11 to the other side in the axial direction of the cover 70 in the axial direction is referred to as "axially downward". In each constituent element, the axially upper end is referred to as an "axially upper end", and the axial position of the axially upper end is referred to as an "axially upper end". Furthermore, the axially lower end is referred to as an "axially lower end", and the axial position of the axially lower end is referred to as an "axially lower end". Furthermore, among the surfaces of the respective constituent element...

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PUM

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Abstract

The present invention provides a stator unit, a motor and a blower apparatus. The stator unit includes a stator that drives a rotor rotatable about a central axis extending in a vertical direction, acover that accommodates the stator, a filling portion that fills a space between the cover and the stator. The cover includes a tubular portion that extends in an axial direction and covers a radiallyside portion of the stator opposing the rotor in a radial direction, a lid portion that covers an axially upper end portion of the stator, and a cover stepped portion that is provided on a first radial side with respect to the tubular portion. The cover stepped portion comes in contact with the axially upper end portion of the stator and is positioned on an axially lower side with respect to an axially upper end portion of the tubular portion.

Description

technical field [0001] The present invention relates to a stator unit, a motor and an air supply device. Background technique [0002] There is known a technique of covering a stator with a covered cylindrical cover member in order to improve the waterproofness of the stator. For example, in Patent Document 1, a stator assembly is arranged in the storage space of the first cover in order to have a waterproof effect. A filler is filled between the first cover and the stator assembly. [0003] However, when the rotor is attached to the stator and driven, the thickness of the cylindrical portion of the cover member covering the stator affects the rotation characteristics of the rotor. This is because the barrel portion creates a magnetic gap between the rotor and the stator. The thicker the barrel section, the greater its effect. [0004] prior art literature [0005] patent documents [0006] Patent Document 1: Japanese Patent Laid-Open No. 2007-159393 Contents of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/14
CPCH02K1/14H02K15/12H02K5/1282H02K5/1735H02K7/14H02K1/187H02K11/33F04D25/0646H02K5/128H02K5/10H02K1/165H02K1/182F04D19/002H02K5/08
Inventor 山崎雄太青井英树北村佳久川田纯也井筒类
Owner NIDEC CORP
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