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Rotors and rotating electrical machines

A rotor and rotor core technology, applied in synchronous motors, electromechanical devices, and electrical components with static armatures and rotating magnets, can solve problems such as increased iron loss, large magnetic flux, and reduced energy efficiency, and achieve stress The effect of alleviating and preventing the magnetic flux from becoming too large

Active Publication Date: 2021-11-19
AISIN AW CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is considered that the magnetic flux generated from the magnet of the rotor does not decrease and passes across the slit in a no-load state or a low-load state, so that the magnetic flux becomes excessive
In this case, the iron loss in the rotor or the stator increases due to the excessive magnetic flux, and the energy efficiency when the rotor is rotated by other devices decreases.

Method used

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  • Rotors and rotating electrical machines
  • Rotors and rotating electrical machines
  • Rotors and rotating electrical machines

Examples

Experimental program
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Embodiment Construction

[0023] Hereinafter, one embodiment of the present invention will be described based on the drawings.

[0024] [Structure of rotor core]

[0025] refer to Figure 1 to Figure 5 , the structure of the rotor 1 (rotating electric machine 100 ) of this embodiment will be described.

[0026] In the description of the present application, "axial direction" refers to the direction along the rotation axis C1 of the rotor 1 , and refers to the Z direction in the figure. In addition, "radial direction" refers to the radial direction of the rotor 1 (direction of arrow R1 or direction of arrow R2), and "circumferential direction" refers to the circumferential direction of the rotor 1 (direction of arrow E1 or direction of arrow E2).

[0027] Such as figure 1 As shown, the rotating electric machine 100 includes a rotor 1 and a stator 2 . In addition, the rotor 1 and the stator 2 are each formed in an annular shape. Furthermore, the rotor 1 is arranged to face the radial inner side of t...

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Abstract

The present invention relates to rotors and rotating electric machines. The rotor (1) is equipped with a permanent magnet (4) and a rotor core (5), and a hole (20) is provided in the rotor core (5). Inwardly, when viewed along the F direction, it overlaps with the permanent magnet (4) in the G direction. The hole (20) relaxes the stress generated by the expansion of the permanent magnet (4) and suppresses the stress generated by the permanent magnet (4). flux. The hole (20) is formed such that the total width (W11+W12) of the minimum width (W11) of the first magnetic flux path (51) and the minimum width (W12) of the second magnetic flux path (52) is smaller than the first magnetic flux path (51) The total length (L2) of the path (51) and the second magnetic flux path (52) along the G direction.

Description

technical field [0001] The present invention relates to rotors and rotating electric machines. Background technique [0002] Conventionally, a rotor and a rotating electrical machine provided with permanent magnets are known (for example, refer to Patent Document 1). [0003] The aforementioned Patent Document 1 discloses a rotor including magnets arranged in magnet holes provided in a rotor core. In this rotor, a plurality of slits are provided in the rotor core. The slot is deformably designed so that the opposite inner sides of the slot approach or come into contact with each other due to the stresses caused by the difference in thermal expansion of the rotor core and the magnet. More specifically, in this rotor, a resin material is disposed between the magnet holes and the magnets. When manufacturing the rotor, the rotor core is heated together with the magnets in order to thermoset the resin material. At this time, the rotor core thermally expands, while the magnet t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27
CPCH02K1/2753H02K2213/03H02K1/2766H02K21/14
Inventor 杉浦侑快池本正幸斋藤尚登雁木卓佐野新也
Owner AISIN AW CO LTD