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Permanent magnet motor, compressor using same, and refrigeration cycle device

A refrigeration cycle and motor technology, applied in the direction of electromechanical devices, electric components, magnetic circuit rotating parts, etc., can solve the problems of forming/processing difficulties, achieve the effects of improving efficiency, suppressing leakage flux, and increasing torque

Active Publication Date: 2017-06-30
HITACHI JOHNSON CONTROLS AIR CONDITIONING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using Figure 10 In the case of the structure, the wedge 102 is required in order to fasten the layered core material 2 to the core material inner peripheral connecting portion 101, and securing the strength of this portion becomes a problem.
At the same time, it is necessary to provide a wedge-shaped concave portion (or convex portion) in the inner peripheral connecting portion 101 of the core material, and there is a problem that molding / processing is difficult.

Method used

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  • Permanent magnet motor, compressor using same, and refrigeration cycle device
  • Permanent magnet motor, compressor using same, and refrigeration cycle device
  • Permanent magnet motor, compressor using same, and refrigeration cycle device

Examples

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Embodiment 1

[0039] Below, use Figure 1 ~ Figure 4 A first embodiment of the present invention will be described. figure 1 It is a figure which stereoscopically shows the circumferential 1 / 4 part of the stator and the rotor of the permanent magnet motor in this Example. Figure 2 is for figure 1 A diagram illustrating how to assemble the rotor. Figure 3A is shown using a cross-section perpendicular to the axis of rotation figure 1 , Partial sectional view of the rotor of 2. Figure 3B is shown using a longitudinal section along the axis of rotation Figure 3A Partial sectional view of the rotor. Figure 4 shown in figure 1 A drawing of a permanent magnet type motor provided with a slit, and is three-dimensionally shown with figure 1 The same stator with a diagram of the circumferential 1 / 4 part of the rotor.

[0040] Such as figure 1 As shown, in the permanent magnet motor of this embodiment, the rotor 1 is provided on the inner peripheral side of the stator 9 . The rotor ...

Embodiment 2

[0060] Below, use Figure 5 A second embodiment of the present invention will be described. Figure 5 It is a figure which three-dimensionally shows the circumferential 1 / 4 part of the stator and the rotor of the permanent magnet type motor which concerns on the 2nd Embodiment of this invention.

[0061] The structure of this embodiment and figure 1 The difference is that the N side protrusions 2a, 2c, 2e, 2g (2c, 2e, 2g not shown) and the S-side protrusions 2b, 2d, 2f, 2h (2d, 2f, 2h not shown) are constituted in a mechanically connected state. In other words, in figure 1 Among them, the N-side convex portion 2a and the S-side convex portion 2b are composed of separate core materials, but in Figure 5 formed into one.

[0062] By adopting such a structure, since the rotor core 2 can be processed integrally, the assembly operation becomes very easy, and the manufacturing cost is significantly reduced accordingly. In addition, since the N-side convex portion and the S-s...

Embodiment 3

[0068] Hereinafter, a third embodiment of the present invention will be described using FIG. 6 . Figure 6A It is a partial sectional view showing the rotor of the permanent magnet motor according to the third embodiment of the present invention in a cross section perpendicular to the rotation axis. Figure 6B It is a partial sectional view showing the rotor of the permanent magnet motor according to the third embodiment of the present invention in a longitudinal section along the rotating shaft. because Figure 6A structure with Figure 3A have the same structure, so their description is omitted.

[0069] Figure 6B structure with Figure 3B The difference in the structure is that a group of components composed of three axial sections A, B, and C are connected in the axial direction. Here, three sets of component structures are shown. Component 1 is structured with Figure 3B The structure is the same, and the cross-sections A, B, and C are formed in order from the pos...

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Abstract

PROBLEM TO BE SOLVED: To improve torque and efficiency by reducing a leakage magnetic flux of a permanent magnet in a permanent magnet type motor employing a spoke-type magnet.SOLUTION: The permanent magnet type motor comprises a stator including a plurality of teeth and a rotor which is disposed via a gap in a radial direction relative to the stator. The rotor is configured by axially combining an S-pole core that is magnetized closer to an S pole, and an N-pole core that is magnetized closer to an N pole. In the S-pole core, a plurality of S-side protrusions are formed which protrude outside in a circumferential direction and in the N-pole core, a plurality of N-side protrusions are formed which protrude outside in a circumferential direction. By combining the S-pole core and the N-pole core, the S-side protrusions and the N-side protrusions are disposed alternately and between the alternately disposed S-side protrusion and the N-side protrusion, a protrusion permanent magnet is disposed in such a manner that a side of the S-side protrusion becomes the S pole and a side of the N-side protrusion becomes the N pole.

Description

technical field [0001] The present invention relates to a permanent magnet motor, a compressor using the permanent magnet motor, and a refrigeration cycle device. Background technique [0002] In a permanent magnet motor, an Interior Permanent Magnet (hereinafter referred to as IPM) structure in which a permanent magnet is embedded in a rotor is widely used. In the IPM structure, the magnet surface area that can be ensured to the maximum is determined by the arrangement method of the magnet insertion hole. In order to reduce the size of the motor, increase the torque, and improve the efficiency, it is necessary to increase the surface area of ​​the magnets as much as possible within the limited space of the rotor section. The magnetized magnet technology (hereinafter referred to as spoke-shaped magnet arrangement). [0003] By adopting the spoke-shaped magnet arrangement, it is possible to ensure that the magnetic flux generating surface is a surface extending in the radia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27
CPCH02K1/2713
Inventor 高桥晓史丸山惠理初濑涉浅海勇介
Owner HITACHI JOHNSON CONTROLS AIR CONDITIONING INC
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