Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Rotating electric machine

A technology of rotating electrical machines and armatures, applied in synchronous motors with stationary armatures and rotating magnets, prefabricated windings embedded in motors, electromechanical devices, etc., can solve problems such as breakage and easy reduction of strength

Pending Publication Date: 2021-11-02
DENSO CORP
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In this way, when holes such as through-holes and recesses are provided in each electrical steel sheet, the radial thickness dimension of the electromagnetic steel sheet becomes locally thinner in the vicinity of the hole, and the strength tends to decrease.
Therefore, when a force exceeding a specified value is applied to the portion near the above-mentioned hole in the circumferential direction, fracture may occur

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rotating electric machine
  • Rotating electric machine
  • Rotating electric machine

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0105] The rotating electric machine 10 of this embodiment is a synchronous multiphase AC motor and has an outer rotor structure (outer rotation structure). Figure 1 to Figure 5 The outline of the rotating electric machine 10 is shown. figure 1 is a vertical perspective view of the rotating electrical machine 10, figure 2 is a longitudinal sectional view of the rotating electrical machine 10 along the direction of the rotating shaft 11, image 3 is a cross-sectional view of the rotating electrical machine 10 in a direction perpendicular to the rotating shaft 11 ( figure 2 III-III line sectional view), Figure 4 is enlarged image 3 A section view of a part of Figure 5 is an exploded view of the rotating electrical machine 10 . In addition, in image 3 In FIG. 2 , for convenience of illustration, except for the rotating shaft 11 , hatching indicating a cut surface is omitted. In the following description, the direction in which the rotating shaft 11 extends is referr...

no. 2 approach

[0280] In the present embodiment, the polar anisotropy structure of the magnet unit 42 in the rotor 40 is changed, which will be described in detail below.

[0281] Such as Figure 22 and Figure 23 As shown, the magnet unit 42 is constructed using a magnet array called a Halbach array. That is, the magnet unit 42 has: the first magnet 131 whose magnetization direction (the direction of the magnetization vector) is the radial direction, and the second magnet 132 whose magnetization direction (the direction of the magnetization vector) is the circumferential direction. The first magnets 131 are arranged in the circumferential direction, and the second magnets 132 are arranged at positions between adjacent first magnets 131 in the circumferential direction. The first magnet 131 and the second magnet 132 are permanent magnets made of rare earth magnets such as neodymium magnets, for example.

[0282] The first magnets 131 are arranged apart from each other in the circumferenti...

Deformed example 1

[0296] In the above-described embodiment, the outer peripheral surface of the stator core 52 is formed into a curved surface without unevenness, and the plurality of lead wire groups 81 are arranged side by side at predetermined intervals on the outer peripheral surface, but this may be changed. For example, if Figure 25 As shown, the stator core 52 has an annular yoke 141 and a protruding portion 142. The yoke 141 is provided on the opposite side to the rotor 40 (the lower side in the figure) on both radial sides of the stator winding 51. The protruding portion 142 extends from the yoke portion 141 to protrude between the linear portions 83 adjacent in the circumferential direction. The protrusions 142 are provided at predetermined intervals on the radially outer side of the yoke 141 , that is, on the side of the rotor 40 . Each lead wire group 81 of the stator winding 51 engages with the protruding portion 142 in the circumferential direction, and the protruding portion 14...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
saturation flux densityaaaaaaaaaa
thermal resistanceaaaaaaaaaa
Login to View More

Abstract

A magnet portion (700) includes a plurality of magnets (702) arranged side-by-side in a circumferential direction. Each magnet is oriented in such a way that the orientation of the easy axis of magnetization is more parallel to a d-axis, which is a magnetic pole center, on the side of the d-axis than on the side of a q-axis, which is a magnetic pole boundary, a magnetic path of the magnet is formed along the easy axis of magnetization, and each magnet is provided centered around the d-axis, between q-axes that are adjacent to one another in the circumferential direction. Hole portions (707) are provided in the axial direction in a plate member (701a) forming a magnet holding portion (701), and fixing members (708) for fixing the plate member are inserted into the hole portions. Dividing walls (706) dividing the magnets from one another are provided in the magnet holding portion, and the hole portions are provided in positions overlapping the dividing walls in the radial direction.

Description

[0001] References to related applications [0002] This application is based on Japanese Patent Application No. 2019-053771 filed on March 20, 2019, and its content is incorporated herein by reference. technical field [0003] The disclosure of this specification relates to a rotating electric machine. Background technique [0004] Conventionally, as a rotating electrical machine, an IPM (Interior Permanent Magnet) type rotor in which a magnet housing hole is formed in a rotor core formed by laminating electromagnetic steel sheets and a magnet is inserted into the magnet housing hole has been widely used. As a magnet employed in the rotor as described above, there is a magnet disclosed in Patent Document 1, for example. According to Patent Document 1, it is possible to use a magnet having a surface magnetic flux density distribution close to a sine wave, and since the change in magnetic flux is gentler than that of a radial magnet, eddy current loss can be suppressed. In a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27
CPCH02K5/203H02K21/22H02K3/47H02K11/33H02K1/2792H02K1/2786H02K15/06H02K2213/03
Inventor 高桥裕树
Owner DENSO CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com