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Motor, and compressor

A motor and rotor core technology, applied in the field of compressors and motors, can solve the problems of impeding the flow of magnetic flux, reducing torque and efficiency, increasing sound vibration, etc. Effect

Active Publication Date: 2009-11-18
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the rivet is located near the center of the permanent magnet and inside the radial direction of the permanent magnet, since the distance from the rivet to the outer circumference is long, the rigidity near the outer circumference may decrease and the sound vibration may increase.
And, conversely, when the rivet is located near the center of the permanent magnet and outside the radial direction of the permanent magnet, since the rivet is located in an area where the magnetic flux density is higher than that of the inner side of the magnet, the flow of the magnetic flux is hindered and the rotation speed is reduced. reduced torque and efficiency
In addition, if the reduction in torque and efficiency is to be suppressed, the outer diameter of the rivet will be reduced, which may result in a decrease in rigidity and an increase in sound vibration

Method used

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  • Motor, and compressor
  • Motor, and compressor
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Effect test

no. 1 approach

[0029] Figure 1A A plan view of the rotor 30 of the motor according to the first embodiment of the present invention is shown.

[0030] Such as Figure 1A As shown, the rotor 30 of the motor has: a rotor core 31 formed by laminating electromagnetic steel plates; six permanent magnets 32, which are respectively embedded in the embedded holes 31b passing through the above-mentioned rotor core 31 in the axial direction; The top is arranged in a substantially regular hexagon; six holes 31c are arranged near the vertices of the regular hexagon formed by the permanent magnets 32 of the above-mentioned rotor core 31 and arranged on the inner side in the radial direction of the vertices, and penetrate through the rotor core in the axial direction. 31; rivets 33 inserted through the six holes 31c as an example of fastening members for fastening the rotor core 31; and through holes 34 provided between the rivets 33 of the rotor core 31 as a shaft An example of a fluid passage penetra...

no. 2 approach

[0044] image 3 A plan view of the rotor 130 of the motor according to the second embodiment of the present invention is shown. The rotor 130 of the electric motor of the second embodiment has the same structure as the rotor 30 of the electric motor of the first embodiment except for the rivet, and the same reference numerals are assigned to the same structural parts, and description thereof will be omitted.

[0045] For the rotor 130 of the motor, as image 3 As shown, a rivet 33 as an example of a fastening member is inserted through every other of the six holes 31c. The laminated steel plates of the rotor core 31 are sandwiched from both sides in the axial direction by end plates 36 , and the rotor core 31 is fastened by three rivets 33 . Furthermore, the remaining three holes 31c through which the rivets 33 are not inserted are used as fluid passages. In addition, if the hole 31c for the rivet 33 is too small, the rivet 33 cannot be inserted, and if it is too large, the...

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PUM

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Abstract

A rotor (30) comprises a rotor core (31) having electromagnetic steel sheets laminated, six permanent magnets (32) buried axially in the rotor core (31) and arranged substantially in a regular hexagon shape in the circumferential direction, rivets (33) arranged near and radially inside of the apexes of the regular hexagon formed of the six permanent magnets (32), and extending therethrough in the axial direction to fasten the rotor core (31), and through holes (34) formed between the rivets (33) of the rotor core (31) and extending axially through the rotor core (31). The through holes (34) are formed in the rotor core (31) radially inside of the central portions of the permanent magnets (32).

Description

technical field [0001] The present invention relates to an inner rotor type electric motor and a compressor using the electric motor. Background technique [0002] In the past, as the first motor existed with Figure 5 The rotor 330 shown is an inner rotor type motor. Such as Figure 5 As shown, the rotor 330 of the motor has: a rotor core 331 made of laminated steel plates; and six permanent magnets 332 embedded in holes penetrating the rotor core 331 in the axial direction. exist Figure 5 Among them, 335 is a riveting part provided on the rotor core 331 . The six permanent magnets 332 are arranged in a regular hexagon in the circumferential direction. Near the apex of the regular hexagon formed by the permanent magnets 332 and on the inside in the radial direction of the apex, the rotor core 331 is penetrated by a rivet 333, and the rotor core 331 is clamped and fixed from both sides in the axial direction using end plates (not shown). laminated steel plates. Furtherm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27F04C29/00
CPCH02K1/32H02K7/14F04C23/008H02K1/276F04C29/0085F04C29/00H02K1/27
Inventor 小岛浩明
Owner DAIKIN IND LTD
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