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Rotating electrical machine

A technology of rotating motors and rotors, which is applied in the field of rotating motors and can solve problems such as shortening the life of the belt and belt slippage

Inactive Publication Date: 2011-01-12
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the inertia of the rotor increases, if there is engine rotation pulsation, etc., the inertia torque of the rotor increases, exceeding the drive torque transmission capacity of the belt, causing belt slippage, and shortening the life of the belt.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0046] figure 1 is a cross-sectional view schematically showing the vehicle alternator according to Embodiment 1 of the present invention, figure 2 is a perspective view showing a rotor applied to the vehicle alternator according to Embodiment 1 of the present invention, image 3It is a perspective view illustrating a method of encapsulating a permanent magnet in a magnetic induction component in the vehicle alternator according to Embodiment 1 of the present invention.

[0047] Figure 1 to Figure 3 Among them, the vehicle alternator 1 includes: a housing 4 composed of a roughly bowl-shaped aluminum front bracket 2 and a rear bracket 3, a rotating shaft 16 is supported on the housing 4 via a bearing 5, and The rotor 13 rotatably arranged in the housing 4, the pulley 6 fastened to the end of the rotating shaft 16 extending to the front side of the housing 4, and the rotor 13 fixed in the axial direction (hereinafter referred to as the axial direction) The fan 7 on both end...

Embodiment approach 2

[0087] Figure 10 is a cross-sectional view showing main parts of a rotor applied to a vehicle alternator according to Embodiment 2 of the present invention, Figure 11 It is a perspective view illustrating a method of encapsulating a permanent magnet in a magnetic induction component in the vehicle alternator according to Embodiment 2 of the present invention.

[0088] Figure 10 as well as Figure 11 Among them, the first permanent magnet 32A is formed as a flat surface whose upper surface is substantially parallel to the inner peripheral surface on the front end side of the second claw-shaped magnetic pole portion 24 . Therefore, the magnetization direction 40 of the first permanent magnet 32A is a direction perpendicular to the upper surface thereof. Here, the second permanent magnet has the same configuration as the first permanent magnet 32A.

[0089] In addition, other configurations are configured in the same manner as in the first embodiment described above.

[0...

Embodiment approach 3

[0094] Figure 12 is a cross-sectional view showing main parts of a rotor applied to a vehicle alternator according to Embodiment 3 of the present invention, Figure 13 It is a perspective view illustrating a method of encapsulating a permanent magnet in a magnetic induction component in the vehicle alternator according to Embodiment 3 of the present invention.

[0095] Figure 12 as well as Figure 13 In the first magnetic induction member 30A, the bottom surface of the first fitting groove 31A is formed as a flat surface substantially parallel to the inner peripheral surface on the front end side of the second claw-shaped magnetic pole portion 24 . Here, the second magnet holding portion has the same configuration as the first magnetic induction member 30A.

[0096] In addition, other configurations are configured in the same manner as in the first embodiment described above.

[0097] In the rotor 13B thus constituted, since the first magnetic induction member 30A is fit...

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Abstract

A rotating electrical machine for realizing the longer life of a belt by suppressing an increase in the inertia of a rotator, and realizing high output by increasing field electromotive force is achieved. In the rotating electrical machine, first and second magnetic induction members (30, 35) are provided on first and second valley portions (25, 26) in such a manner that the members are fit into first and second holding grooves (27, 28) extendedly provided in an axis direction in opposed portions of outer diameter sides of the inner wall surfaces of the first and second valley portions (25, 26). First and second eternal magnets (32, 37) magnetized and oriented in a direction opposite to that of a magnetic field (41) generated by a field magnetic coil (14) are fit to and held at fitting grooves of the first and second magnetic induction members (30, 35) in such a manner that the magnets are opposed to the inner periphery surfaces of the leading end sides of second and first nail-like magnetic pole portions (24, 20) with a predetermined gap therebetween.

Description

technical field [0001] The present invention relates to a rotating electrical machine such as a vehicle alternator, and more particularly to a claw pole type rotor. Background technique [0002] Vehicle alternators using a claw pole type rotor have been used in automobiles for decades. However, in recent years, due to environmental problems, the load on electronic components in vehicles has increased rapidly, and the claw pole type rotor has been required to further increase the amount of power generation. [0003] In order to increase the output of a claw pole type rotating electrical machine, it is most effective to increase the magnetomotive force of the magnetic field of the rotor. However, if the magnetomotive force of the magnetic field is increased and the magnetic flux passing through the rotor is increased, it is required to design the dimensions of each part of the rotor so that the magnetic flux density is appropriate in order to avoid magnetic saturation of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K19/22
CPCH02K21/044
Inventor 吉泽敏行井上正哉新川宽治守田正夫枦山盛幸森刚秋田裕之下村龙一田中和德西村慎二
Owner MITSUBISHI ELECTRIC CORP
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