Motor, compressor and refrigeration equipment

A component and rotor core technology, applied in the field of refrigeration equipment, can solve the problem that the anti-demagnetization ability of the motor cannot meet the use requirements, and achieve the effects of high anti-demagnetization ability, stable operation, and reduced consumption

Active 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

However, studies have shown that the reduction of the content of heavy rare earth elements in permanent magnets will make the anti-demagnetization ability of the motor less than the requirements for use

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as Figure 1 to Figure 3 As shown, the first aspect of the present invention provides a motor 100, which includes a stator assembly 102 and a rotor assembly 104.

[0045] Specifically, such as figure 1 As shown, the stator assembly 102 includes a stator core 1022, the stator core 1022 is provided with a stator slot 1024, the rotor assembly 104 includes a rotor core 1042 and a permanent magnet 1044, and the rotor core 1042 is provided with a permanent magnet 1044, such as image 3 As shown, in a section perpendicular to the axis of the rotor core 1042, the distance between the stator core 1022 and the rotor core 1042 is defined as δ mm, the length of the permanent magnet 1044 in its own magnetization direction is h mm, and the stator slot The number of gaps 1024 is Q, the intrinsic coercivity of the permanent magnet 1044 is Hcj kA / m, and the Hcj is less than or equal to 1800 kA / m, and the distance between the stator core 1022 and the rotor core 1042 is further limited. ...

Embodiment 2

[0057] Such as Figure 1 to Figure 3 As shown, in an embodiment of the present invention, the motor 100 includes: a stator assembly 102 and a rotor assembly 104, wherein the stator assembly 102 includes a stator core 1022, the stator core 1022 is provided with a stator slot 1024; the rotor assembly 104, the rotor The assembly 104 includes a rotor core 1042 and a permanent magnet 1044; further, the number of stator slots 1024 is Q; the intrinsic coercivity of the permanent magnet 1044 is Hcj kA / m, and the Hcj is less than or equal to 1800 kA / m; the stator iron The distance between the core 1022 and the rotor core 1042 is δ mm; the length of the permanent magnet 1044 in its own magnetization direction is h mm; where the value of h satisfies: 80×(45-Q) / Hcj≤h≤1.3+ δ.

[0058] In this embodiment, as image 3 As shown, the numerical range of the length h mm of the permanent magnet 1044 in the magnetization direction of the permanent magnet 1044 is further limited as: 80×(45-Q) / Hcj≤h≤1....

Embodiment 3

[0065] Such as Figure 1 to Figure 3 As shown, in any of the above embodiments, further, the range of the mass percentage of dysprosium and / or terbium in the permanent magnet is: 0 to 0.5%, or the range of the mass percentage of heavy rare earth elements in the permanent magnet is: 0 to 0.5%.

[0066] In this embodiment, since dysprosium and terbium are heavy rare earth elements, which are national strategic resources, the mass percentage of heavy rare earth elements in the permanent magnet 1044 is positively correlated with the intrinsic coercivity Hcj of the permanent magnet 1044 . Therefore, on the one hand, by limiting the mass percentage of dysprosium and / or terbium in the permanent magnet 1044 to 0 to 0.5%, it is beneficial to reduce the use of dysprosium and / or terbium while ensuring the good demagnetization resistance of the motor 100 In turn, it is beneficial to reduce the manufacturing cost of the motor 100 and improve the cost performance of the motor 100. On the othe...

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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 rotor iron core and a permanent magnet, wherein one of the stator iron core and the rotor iron core is arranged on the outer side ofthe other one in a surrounding manner, and the permanent magnet is arranged on the rotor iron core, wherein in the section perpendicular to the axis of the rotor core, the distance between the statorcore and the rotor core is [delta]mm, the length of the permanent magnet in the magnetization direction of the permanent magnet is h mm, the number of the stator slots is Q, the intrinsic coercive force of the permanent magnet is Hcj kA/m, and Hcj is smaller than or equal to 1800 kA/m, and the numerical value of h meets the equation that h is larger than or equal to 80*(43-Q)/Hcj and smaller thanor equal to 1.6+[delta]. According to the motor provided by the invention, the use of heavy rare earth elements is reduced, the cost is reduced, the use requirements of the compressor can be met, andthe cost 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] At present, in the field of household air conditioners, inverter motors have become the mainstream technology. Especially with the new national energy efficiency rating standards for household air conditioners in 2019, fixed-speed models have gradually withdrawn from the market, and the era of all inverters has arrived. In order to meet the demand for compressors in air-conditioning systems, most of the permanent magnets used in current inverter motors are neodymium iron boron permanent magnets containing heavy rare earth elements and high coercivity. Because heavy rare earth elements are national strategic resources, and With the development trend of all frequency conversion of household air conditioners, the total number of frequency conversion models has increased year by year...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/16H02K1/27F04B35/04F25B31/02
CPCH02K1/165H02K1/2766F04B35/04F25B31/02H02K2213/03H02K21/16H02K2201/03F04B39/121H02K29/03H02K1/02H02K1/16H02K1/2726H02K15/03
Inventor 陈超张德金邱小华
Owner ANHUI MEIZHI PRECISION MFG
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