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Dynamo electric machine

A technology of rotating electrical machines and torque, applied in synchronous motors with stationary armatures and rotating magnets, electric components, electrical components, etc. question

Inactive Publication Date: 2011-08-24
AISIN AW CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the magnetic field from the ends of the bent coils cannot be effectively utilized, and the degree of improvement in torque and energy efficiency is very small.

Method used

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Experimental program
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Effect test

no. 1 approach

[0042] First, a first embodiment of the present invention will be described based on the drawings. Such as figure 1 and figure 2 As shown, the rotating electric machine 1 of the present embodiment includes a stator 6 in which a coil 8 is wound around a substantially cylindrical stator core 7 , and a rotor 2 rotatably supported radially inward of the stator 6 . In the present embodiment, only one of the two coil end portions 81 , 82 provided on both axially opposite sides of the stator 6 is a bent coil end portion 81 bent radially inward of the stator core 7 . In addition, the rotor 2 includes a substantially cylindrical rotor core 3 and an opposing end plate 4 that faces the bent coil end portion 81 and is attached to the axial end surface 31 of the coil core 3 concentrically with the coil core 3 . . The rotating electrical machine 1 of the present invention is particularly characterized by the configuration of the opposed end plates 4 . Below, refer to Figure 1 ~ Figur...

no. 2 approach

[0064] Below, refer to Figure 4 and Figure 5 A second embodiment of the present invention will be described. The configuration of the opposing end plate 4 of the rotating electrical machine of this embodiment is different from that of the first embodiment described above. That is, the opposing end plate 4 of the present embodiment does not include the permanent magnet 52 , and only includes the salient pole portion 51 as the torque generating portion 5 . That is, this opposing end plate 4 is similar to a member constituted only of the plate main body 45 of the first embodiment described above. In addition, the opposing end plate 4 has a plurality of salient pole portions 51 protruding in a direction approaching the bent coil end portion 81 along the circumferential direction of the opposing end plate 4 .

[0065] The salient pole portion 51 is formed so as to protrude in a direction approaching the bent coil end portion 81 on both the surface 41 and the outer peripheral s...

no. 3 approach

[0068] Below, refer to Figure 6 A third embodiment of the present invention will be described. The structure of the facing end plate 4 of the rotary electric machine 1 of this embodiment differs from that of the said 1st and 2nd embodiment. That is, the opposed end plate 4 of the present embodiment is composed of a powder compact formed by press-molding magnetic powder of a hard magnetic material capable of becoming a permanent magnet. A partially magnetized permanent magnet 52 constitutes the torque generator 5 . Hereinafter, the rotating electrical machine 1 of this embodiment will be mainly described in terms of differences from the first embodiment described above. In addition, in the description of this embodiment, the same configuration as that of the above-mentioned first embodiment will be employed for points that are not particularly mentioned.

[0069]In the present embodiment, the powder compact constituting the opposing end plate 4 is formed by pressure-molding...

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PUM

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Abstract

Disclosed is a dynamo electric machine wherein at least one coil end in the axial direction of a stator is bent toward the radial inside of the stator core and formed as a bent coil end, and eddy current loss caused by a magnetic field generated from the bent coil end is minimized. Torque of the rotor in the rotational direction is enhanced in such a dynamo electric machine by efficiently utilizing the magnetic field generated from the bent coil end. The rotor (2) includes a substantially cylindrical rotor core (3), and a counter end plate (4) which is fixed to the axial end face (31) of the rotor core (3) concentrically with the rotor core (3) while facing the bent coil end (81), wherein the counter end plate (4) principally comprises powder material produced by pressure molding the magnetic powder, i.e. the powder of a magnetic material, and a nonconductive state where an induction current produced by the magnetic field generated from the bent coil end (81) is regulated is brought about between the magnetic powders composing the powder material.

Description

technical field [0001] The present invention relates to a rotating electric machine including a stator in which coils are wound around a substantially cylindrical stator core, and a rotor rotatably supported on the inner side in the radial direction of the stator. Background technique [0002] As a rotating electrical machine including a stator in which coils are wound around a substantially cylindrical stator core, and a rotor rotatably supported radially inward of the stator, for example, the following patent document 1 discloses the following: Composition of the rotating electrical machine shown. That is, this rotating electrical machine has a configuration in which at least one of both coil end portions of the two axially outer coils of the stator core is bent radially inward so that the head end approaches the rotor. According to the structure of such a rotating electric machine, the end of the curved coil bent inward in the radial direction is closely opposed to the a...

Claims

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Application Information

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IPC IPC(8): H02K1/22H02K1/27H02K21/14
CPCH02K3/50H02K3/505H02K3/42
Inventor 山本义久武田健稻垣智广山口康夫
Owner AISIN AW CO LTD
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