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

Electric rotating machine

A technology for rotating electrical machines and stator cores, applied in synchronous generators, electromechanical devices, electrical components, etc., can solve problems such as stator coil heat dissipation and stator, and achieve the effects of suppressing poor insulation, suppressing temperature rise, and suppressing the increase of reluctance Effect

Active Publication Date: 2011-10-26
MITSUBISHI ELECTRIC CORP
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art described above, no consideration has been given to the technology of effectively dissipating the heat generated by the stator coil to suppress the temperature rise of the stator.

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
  • Electric rotating machine
  • Electric rotating machine
  • Electric rotating machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0028] figure 1 is a longitudinal sectional view showing the automotive alternator according to Embodiment 1 of the present invention, figure 2 is a perspective view showing a stator applied to an automotive alternator according to Embodiment 1 of the present invention, image 3 is a circuit diagram showing an automotive alternator according to Embodiment 1 of the present invention, Figure 4 It is a cross-sectional view of main parts for explaining the fixing structure of the stator of the automotive alternator according to Embodiment 1 of the present invention.

[0029] exist Figure 1 to Figure 4 Among them, the vehicle alternator 100 includes: a casing 3, which is composed of a front frame 1 and a rear frame 2 that are made of aluminum and are approximately cup-shaped, respectively; 4; a pulley 5 affixed to the end of the shaft 4 extending toward the front side of the casing 3; a rotor 6 fixed on the shaft 4 and housed in the casing 3; fixed on both axial ends of the r...

Embodiment approach 2

[0053] Figure 12 It is a cross-sectional view of main parts for explaining the fixing structure of the stator of the automotive alternator according to Embodiment 2 of the present invention.

[0054] exist Figure 12 In , the insulating film 29 covers the outer peripheral surface of the stator core 15 .

[0055] The other structures are the same as those of the first embodiment described above.

[0056] In Embodiment 2, as in Embodiment 1 above, strip-shaped magnetic thin plates 31 are laminated and integrated to form a rectangular parallelepiped laminated core 32, and the laminated core 32 to which winding assembly 40 is attached is bent into a cylindrical shape, and the The stator core 15 is formed by abutting and welding both end faces of the laminated core 34 bent into a cylindrical shape. Next, an insulating resin made of, for example, an epoxy resin is applied to the outer peripheral surface of the stator core 15 to form the stator core 15 in which the insulating fil...

Embodiment approach 3

[0061] Figure 13 It is a cross-sectional view of main parts for explaining the fixing structure of the stator of the automotive alternator according to Embodiment 3 of the present invention.

[0062] exist Figure 13 Among them, the stator core 15A is produced by laminating a predetermined number of strip-shaped magnetic thin plates 31 having a thickness (t1) of 0.3 mm, for example, and laminating a strip-shaped magnetic thin plate 31A having a thickness (t2) of 1.0 mm, for example. Both ends of the laminate of strip-shaped magnetic thin plates 31 are formed by welding the laminates of strip-shaped magnetic thin plates 31, 31A into one body, bending them into a cylindrical shape, and welding the butt joints of both ends.

[0063] The other structures are the same as those of the first embodiment described above.

[0064] In Embodiment 3, since the strip-shaped magnetic thin plates 31A made of thick plates are arranged at both ends of the laminated body bent into a cylindric...

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

No PUM Login to View More

Abstract

A dynamo-electric machine in which occurrence of poor insulation incident to oxidation of a stator core is suppressed without decreasing the output, and temperature rise of the stator is suppressed by transmitting heat generated from the stator coil efficiently to the frame. The stator core is constituted by laminating and integrating magnetic thin plates and has a tubular outer circumferential surface, wherein a fitting groove is formed in the inner circumference of an opening of the frame. The fitting groove is defined by an annular axial surface of a flat surface intersecting the axis of the stator core perpendicularly, and by a radial surface of a tubular surface having the axis of the stator core as a center. The metal surfaces of magnetic thin plate at the opposite axial ends of thestator core are pressure clamped under a tight contact state over the entire circumferences of the respective axial direction surfaces of a pair of frames.

Description

technical field [0001] The present invention relates to rotating electrical machines such as generators, motors, and generator motors mounted on passenger cars, trucks, and the like. Background technique [0002] In a conventional automotive alternator, a notch having an L-shaped cross-section for fitting is formed in an annular shape by cutting the outer peripheral portions of both axial end faces of a cylindrical stator core. A pair of cup-shaped frames are press-fitted into notches of the stator core from both sides in the axial direction, and the stator is joined to the pair of frame strip tips (see, for example, Patent Document 1). [0003] In addition, in other conventional automotive alternators, the stator core is formed into a cylindrical shape by spirally winding and laminating strip-shaped steel plates. A groove-shaped concave portion extending in the axial direction is provided on an outer peripheral portion of the stator core. In addition, both end surfaces in...

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 Patents(China)
IPC IPC(8): H02K1/18H02K5/04H02K19/24
CPCH02K1/185H02K1/04H02K9/227H02K19/22H02K1/12
Inventor 冈本省吾柏原利昭
Owner MITSUBISHI ELECTRIC 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