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Motor, compressor and refrigeration equipment

A component and stator core technology, which is applied in the field of refrigeration equipment, can solve the problems of reduction and demagnetization resistance of motors, and achieve the effects of reducing manufacturing costs, reducing iron losses, and improving cost performance

Inactive Publication Date: 2020-08-18
ANHUI MEIZHI PRECISION MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For current compressors, in order to adapt to the application environment of household air conditioners, most of the permanent magnets of frequency conversion motors are permanent magnets containing heavy rare earth elements and high intrinsic coercive force. Since heavy rare earth elements are national strategic resources, and with the With the development trend of all frequency conversion of air conditioners, the total number of frequency conversion models is increasing year by year. Therefore, the consumption of heavy rare earth elements of national strategic resources is also increasing year by year. However, research shows that the reduction of heavy rare earth content in permanent magnets will cause motor resistance Decrease in demagnetization ability

Method used

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  • Motor, compressor and refrigeration equipment
  • Motor, compressor and refrigeration equipment
  • Motor, compressor and refrigeration equipment

Examples

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Embodiment 1

[0044] Such as figure 1 As shown, according to the first aspect of the present invention, a motor 100 is provided, including a stator assembly 150 and a rotor assembly 160 .

[0045] Specifically, the stator assembly 150 includes a stator core 110, the stator core 110 is provided with a stator slot 112, and the rotor assembly 160 includes a permanent magnet 140, by defining the number of the stator slot 112, the outer diameter of the stator core 110, the stator iron The relationship between the heights of the core 110 can adjust the strength of the demagnetization reverse magnetic field generated by the energization of the motor 100, that is, the strength of the reverse magnetic field that demagnetizes the permanent magnet 140 generated by the energization of the winding 120 of the motor 100, and then in the permanent magnet. When the mass percentage of the heavy rare earth elements in 140 is reduced, or the permanent magnet 140 does not use heavy rare earth elements, that is,...

Embodiment 2

[0054] Such as figure 1 As shown, in one embodiment of the present invention, on the basis of the above-mentioned embodiment 1, further, the outer diameter D of the stator core 110 ranges from 70mm to 150mm, that is, 70mm≤D≤150mm, by setting the stator iron reasonably The value range of the outer diameter D of the core 110 is conducive to reducing the number of turns of the winding 120 in each stator slot 112, thereby reducing the demagnetization reverse magnetic field strength generated by the motor 100 being energized and increasing the demagnetization resistance of the motor 100 . Specifically, the outer diameter D of the stator core 110 is 70 mm, or 100 mm, or 150 mm. Among them, the outer diameter D of the stator core is as figure 1 shown.

[0055] Further, the height L of the stator core 110 ranges from 30 mm to 80 mm, that is, L≥30 mm. By setting the range of the height of the stator core 110 reasonably, it is beneficial to improve the anti-demagnetization capability...

Embodiment 3

[0057] Such as figure 1 As shown, in an embodiment of the present invention, on the basis of the above-mentioned embodiment 1 or embodiment 2, further, the number p of pole pairs of the rotor assembly 160 satisfies: Q-5≤2p≤Q+2.

[0058] In this embodiment, the number of pole pairs p of the rotor assembly 160 satisfies Q-5≤2p≤Q+2, by further defining the relationship between the number of pole pairs p of the rotor assembly 160 and the number Q of the stator slots 112, such that The performance of the motor 100 with the number of slot poles satisfying the above relationship is higher, which improves the reliability of the anti-demagnetization capability of the motor 100 to meet the requirements of the compressor, thereby improving the reliability of the operation of the compressor.

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Abstract

The invention provides a motor, a compressor and refrigeration equipment. The motor comprises: a stator assembly, wherein the stator assembly comprises a stator iron core, and the stator iron core isprovided with a stator slot gap; a rotor assembly which comprises a permanent magnet, wherein the number of the stator slots is Q, the outer diameter of the stator core is D mm, the height of the stator iron core is L mm; the intrinsic coercive force of the permanent magnet is Hcj kA / m, and the numerical value of Hcj meets the equation that Hcj is larger than or equal to 2100-Q*L*130 / D and smallerthan or equal to 1800. The invention provides a motor, when the mass percent of the heavy rare earth elements in the permanent magnet is reduced or the permanent magnet does not use the heavy rare earth elements; by specifically limiting the relationship among the number of the stator slots, the outer diameter of the stator core, the height of the stator core and the intrinsic coercive force of the permanent magnet, the demagnetization reverse magnetic field intensity generated by electrifying the motor is reduced, so that the demagnetization resistance of the motor is enhanced, and the performance of the motor is improved.

Description

technical field [0001] The present invention relates to the technical field of refrigeration equipment, in particular to a motor, a compressor and a refrigeration equipment. Background technique [0002] For current compressors, in order to adapt to the application environment of household air conditioners, most of the permanent magnets of frequency conversion motors are permanent magnets containing heavy rare earth elements and high intrinsic coercive force. Since heavy rare earth elements are national strategic resources, and with the With the development trend of all frequency conversion of air conditioners, the total number of frequency conversion models is increasing year by year. Therefore, the consumption of national strategic resource heavy rare earth elements is also increasing year by year. However, research shows that the reduction of heavy rare earth content in permanent magnets will cause motor resistance. Decreased demagnetization ability. Therefore, how to im...

Claims

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Application Information

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IPC IPC(8): H02K1/16H02K1/27F04B35/04F25B31/02
CPCF04B35/04F25B31/02H02K1/165H02K1/2766H02K2213/03
Inventor 陈超张德金邱小华
Owner ANHUI MEIZHI PRECISION MFG