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Motors, compressors and refrigeration equipment

A technology of stators and convex teeth, applied in mechanical equipment, machines/engines, electric components, etc., can solve the problem that the motor cannot meet the needs of high energy efficiency

Active Publication Date: 2021-05-04
ANHUI MEIZHI PRECISION MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the rotary DC variable frequency compressors using motors in the related art, the motors generally use built-in permanent magnet motors. In recent years, as the threshold of energy efficiency standards has increased, higher requirements have been placed on the energy efficiency of motors. It is increasingly unable to meet the demand for high energy efficiency

Method used

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  • Motors, compressors and refrigeration equipment
  • Motors, compressors and refrigeration equipment
  • Motors, compressors and refrigeration equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] like Figure 1 to Figure 3 As shown, a motor 100 includes: a rotor 110; the rotor 110 includes a rotor core 111, the rotor core 111 is provided with a plurality of slots 112, and the plurality of slots 112 are circumferentially distributed around the center line of the rotor core 111 , each slot 112 is provided with a magnetic piece 113; the stator, the stator includes a stator core 121 and a stator winding, the stator core 121 is provided with a plurality of stator protruding teeth 122, and a plurality of stator protruding teeth 122 surround the stator core 121 The center line of the stator is distributed circumferentially, and the stator windings are wound on a plurality of stator convex teeth 122; wherein, the relationship between the number Z of stator convex teeth 122 and the number of pole pairs P of the rotor 110 satisfies: Z / P=3. The effective value U of the line-to-line back EMF of the stator winding, the speed n of the motor 100 and the outer diameter Φso of t...

Embodiment 2

[0054] On the basis of the first embodiment above, the number Z of the stator convex teeth 122 is further limited to 9, then 0.638≦ke / Φso≦0.933.

[0055] In this embodiment, when the number of stator convex teeth 122 is different, the demagnetization capability of the motor 100 is different, and then different numbers of stator teeth can correspond to different value ranges of ke / Φso. According to the demagnetization characteristics of the motor 100, the higher the number of teeth more, the stronger the demagnetization capability of the motor 100 is, the larger the value range of ke / Φso can be. Thus, when the number Z of stator convex teeth 122 is 9, by making the ratio of ke to the outer diameter Φso of the stator between 0.638 and 0.933, such as ke / Φso is equal to 0.7 or 0.8 or 0.9, the motor can be On the premise that the demagnetization capability of the motor 100 does not decrease, the system loss of the motor 100 is significantly reduced, thereby improving the energy eff...

Embodiment 3

[0061] On the basis of the first embodiment above, the number Z of stator convex teeth 122 is further limited to 12, then 0.679≦ke / Φso≦1.056.

[0062] In this embodiment, when the number of stator convex teeth 122 is different, the demagnetization capability of the motor 100 is different, and then different numbers of stator teeth can correspond to different value ranges of ke / Φso. According to the demagnetization characteristics of the motor 100, the higher the number of teeth more, the stronger the demagnetization capability of the motor 100 is, the larger the value range of ke / Φso can be. Therefore, when the number Z of stator convex teeth 122 is 12, by making the ratio of ke to the outer diameter Φso of the stator between 0.679 and 1.056, such as ke / Φso is equal to 0.7 or 0.8 or 1, the motor can be On the premise that the demagnetization capability of the motor 100 does not decrease, the system loss of the motor 100 is significantly reduced, thereby improving the energy ef...

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Abstract

The invention provides a motor, a compressor and refrigeration equipment. Wherein, the motor includes: a rotor; the rotor includes a rotor core, and the rotor core is provided with a plurality of slots, and the plurality of slots are circumferentially distributed around the center line of the rotor core, and each slot is provided with a magnetic piece; the stator , the stator includes a stator core and a stator winding, the stator core is provided with a plurality of stator convex teeth, the plurality of stator convex teeth are circumferentially distributed around the center line of the stator core, and the stator winding is wound on the plurality of stator convex teeth; Among them, the relationship between the number Z of stator convex teeth and the number of pole pairs P of the rotor satisfies: Z / P=3; the effective value U of back EMF between the lines of the stator winding, the speed n of the motor and the outer diameter Φso of the stator satisfy: ke= U / n, 0.213≤ke / Φso / Z×P≤0.352, where the unit of U is volts, the unit of n is thousand revolutions per minute, P is the pole logarithm, and the unit of Φso is millimeters. It can improve the energy efficiency of the motor.

Description

technical field [0001] The invention belongs to the technical field of refrigeration equipment, and in particular relates to a motor, a compressor and a refrigeration equipment. Background technique [0002] In the rotary DC variable frequency compressors using motors in the related art, the motors generally use built-in permanent magnet motors. In recent years, as the threshold of energy efficiency standards has increased, higher requirements have been placed on the energy efficiency of motors. It is increasingly unable to meet the demand for high energy efficiency. Contents of the invention [0003] The present invention aims to solve one of the technical problems existing in the prior art or related art. [0004] To this end, a first aspect of the invention proposes an electric machine. [0005] A second aspect of the invention proposes a compressor. [0006] A third aspect of the present invention proposes a refrigeration device. [0007] In view of this, according...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27H02K1/14H02K3/18F04B35/04
CPCF04B35/04H02K1/146H02K1/276H02K3/18H02K2213/03
Inventor 徐飞邱小华江波
Owner ANHUI MEIZHI PRECISION MFG
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