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Electric motor and air conditioner

A motor and slit technology, applied in electrical components, air conditioning systems, electric components, etc., can solve the problems of uneven distance of gaps, increased vibration and noise, etc.

Active Publication Date: 2018-07-31
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the commutated pole type rotor, the inductance is different between the magnet poles and the salient poles, and there is a problem of increased vibration and noise due to the unbalanced inductance.
[0007] To solve this problem, in Patent Document 1, in a surface magnet type and commutated pole type rotor, the distance of the gap between the stator and the rotor is made non-uniform in the circumferential direction.

Method used

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  • Electric motor and air conditioner
  • Electric motor and air conditioner
  • Electric motor and air conditioner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0030] figure 1 is a cross-sectional view showing the structure of the motor of this embodiment, figure 2 is a cross-sectional view showing the structure of the rotor of this embodiment, image 3 yes figure 2 A partial enlargement of the Figure 4 It is a sectional view for explaining the magnetic poles of the rotor of this embodiment. It should be noted, Figure 1 to Figure 4 It is a cross-sectional view based on a plane perpendicular to the rotation axis of the motor.

[0031] Such as figure 1 As shown, the motor 1 includes an annular stator 2 and an annular rotor 4 disposed inside the stator 2 . The rotor 4 is rotatably arranged inside the stator 2 via the gap 3 . The rotor 4 is arranged coaxially with the stator 2 , and any axis coincides with the rotation axis of the motor 1 . In the illustrated example, the motor 1 is, for example, a brushless motor with ten poles and twelve slots.

[0032] The stator 2 includes an annular stator core 5 and a coil 8 wound arou...

Embodiment approach 2

[0088] Figure 8 is a cross-sectional view showing the structure of the rotor of this embodiment, Figure 9 It is a figure which shows the structure of the electric motor of this embodiment. It should be noted, Figure 8 It is a cross-sectional view based on a plane perpendicular to the rotation axis of the motor. Figure 9 Includes a sectional view based on a plane containing the motor's rotating shaft. It should be noted that, in Figure 8 and Figure 9 in, for with Figure 1 to Figure 3 The structural elements shown that are the same are assigned the same reference signs. In addition, in Figure 9 In addition to the constituent elements described in Embodiment 1, a sensor substrate 40 , a rotation detection unit 41 attached to the sensor substrate 40 , a shaft 43 inserted through the shaft hole 14 , and a pair of support shafts 43 are shown. Bearing 44 , resin portion 35 described later, and resin portion 39 covering stator 2 .

[0089] Such as Figure 8 As shown,...

Embodiment approach 3

[0097] Figure 10 It is a figure which shows an example of the structure of the air conditioner of this embodiment. The air conditioner 300 includes an indoor unit 310 and an outdoor unit 320 connected to the indoor unit 310 . An indoor unit air blower (not shown) is mounted on the indoor unit 310 , and an outdoor unit air blower 330 is mounted on the outdoor unit 320 . In addition, a compressor (not shown) is mounted on the outdoor unit 320 . The electric motor 1 of Embodiment 1 or 2 is used for the above-mentioned air blower and compressor.

[0098] Thus, by using the electric motor 1 of Embodiment 1 or 2 as a drive source of the blower and compressor of the air conditioner 300, cost reduction, vibration reduction, and noise reduction of the air conditioner 300 can be achieved.

[0099] In addition, the electric motor 1 of Embodiment 1 or 2 may be mounted in the electric equipment other than an air conditioner, and also in this case, the effect similar to this embodiment ...

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PUM

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Abstract

An electric motor (1) is provided with: a stator (2); and a consequent pole-type rotor (4) that includes a ring-shaped rotor core (10) disposed within the stator (2) and a plurality of permanent magnets (11) disposed in the interior of the rotor core (10) and arranged in the circumferential direction of the rotor core (10). The rotor core (10) includes: at least one slit (19) provided in the interior of the rotor core (10) and disposed to the outer side of each permanent magnet (11) in the radial direction of the rotor core (10); and at least one slit (20) provided in the outer circumferentialsurface of the rotor core (10) and disposed between mutually neighboring permanent magnets (11).

Description

technical field [0001] The present invention relates to a motor provided with a commutated pole rotor and an air conditioner provided with the motor. Background technique [0002] Conventionally, in order to improve the energy saving performance of an air conditioner, a rare earth magnet having a high energy density such as a neodymium sintered magnet is generally used as a permanent magnet of a motor mounted in a compressor of the air conditioner. In addition, motors using neodymium sintered magnets have been developed for use in fans of air conditioners. [0003] Such a permanent magnet is expensive because it contains precious rare earth elements. Therefore, there is a strong demand to reduce the amount of permanent magnets used and the processing costs, and to reduce costs. [0004] For permanent magnets, block-like blocks are usually cut and machined into a specified shape. Therefore, as the number of permanent magnets used in the motor increases, the processing cost...

Claims

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Application Information

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IPC IPC(8): H02K1/27
CPCH02K21/16H02K2213/03F24F13/24H02K1/2746H02K1/2753F25B31/00H02K1/276H02K1/27F24F1/0018
Inventor 及川智明山本峰雄石井博幸麻生洋树尾屋隼一郎浦边优人下川贵也矢部浩二
Owner MITSUBISHI ELECTRIC CORP