CN205725185U

CN205725185U - Stator and there is its motor

Info

Publication number: CN205725185U
Application number: CN201620233413.9U
Authority: CN
Inventors: 贾武豪; 卢素华; 陈彬; 刘吉胜
Original assignee: Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
Current assignee: Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
Priority date: 2016-03-23
Filing date: 2016-03-23
Publication date: 2016-11-23
Anticipated expiration: 2026-03-23

Abstract

The utility model discloses a kind of stator and have its motor, wherein, stator is used for being arranged in motor, stator processes through trimming, the MgO-ZrO_2 brick of stator is less than 5, and the number of poles of motor is less than or equal to 12, and the trimming number of stator is unequal with the number of poles of motor.Stator of the present utility model and there is its motor efficiently solve in prior art the stator of motor after trimming processes, the magnetic linkage causing motor is asymmetric, motor run time three-phase current unbalance, motor torque fluctuation strengthen, motor cannot normal table run problem.

Description

Stator and there is its motor

Technical field

This utility model relates to technical field of motors, in particular to a kind of stator and the motor with it.

Background technology

In prior art, the motor of compressor would generally carry out trimming process to stator, is used for ensureing the circulating face of coolant Long-pending and lubrication oil circulation flows.When can reduce punching press after stator trimming, the waste of stalloy material, alleviates motor weight side Just the assembling transport of compressor.When stator trimming being made structure design, it is common that ensure the circulation area of compressor coolant, and Not considering otherwise impact, the magnetic linkage causing motor is asymmetric, three-phase current unbalance when motor runs, motor torque ripple Dynamic increasing, motor cannot run by normal table.

Utility model content

This utility model embodiment provides a kind of stator and there is its motor, to solve determining of motor in prior art Son is after trimming processes, and the magnetic linkage causing motor is asymmetric, three-phase current unbalance when motor runs, and motor torque fluctuation adds Greatly, motor cannot normal table run problem.

For achieving the above object, this utility model provides a kind of stator, is used for being arranged in motor, and stator is through trimming Processing, the MgO-ZrO_2 brick of stator is less than 5, and the number of poles of motor is less than or equal to 12, the trimming number of stator and the pole of motor Number is unequal.

Further, the relation between trimming number and the number of poles of motor of stator is not for divide exactly mutually.

Further, the trimming number of stator is more than the number of poles of motor.

Further, the number of poles of motor is 4, and trimming number is 6 or 10.

Further, the trimming of stator is for be symmetrical arranged two-by-two.

Further, the facies tract of arbitrary phase shifts to install with motor in the trimming of stator.

Further, the central angle that the trimming of stator is corresponding in the cross section of stator isThe span of central angle For:

Wherein, θ is a pair extremely interior mechanical angle shared by arbitrary phase facies tract.

Further, the depth of cut of the trimming of stator is D, and depth of cut D span is: D≤H/2, and wherein, H is Stator yoke width.

Further, stator contact area between the housing of motor is A, and the gross area of the outer surface of stator is B, wherein, A >=0.7B.

According to another aspect of the present utility model, it is provided that a kind of motor, including above-mentioned stator.

In the MgO-ZrO_2 brick motor (number of poles≤12) less than 5, the trimming number of stator should be unequal with number of pole-pairs, makes Composite magnetic power in each electricity cycle rotates not have and is positioned at trimming simultaneously or is not positioned at trimming, the most simultaneously Motor magnetic circuit can be triggered asymmetric, and three-phase balance when motor runs, the magnetic linkage of motor is symmetrical, and torque pulsation subtracts Little, make the motor can be with the operation of normal table.

Accompanying drawing explanation

Fig. 1 is the magnetic line of force distribution schematic diagram of stator of the prior art；

Fig. 2 is the flux linkage calculation value schematic diagram of stator of the prior art；

Fig. 3 is the magnetic line of force distribution schematic diagram of the stator of this utility model embodiment；

Fig. 4 is the flux linkage calculation value schematic diagram of the stator of this utility model embodiment；

Fig. 5 is the torque pulsation comparison diagram that stator causes after trimming processes；

Fig. 6 is the magnetic close change comparison diagram that stator causes after trimming processes；

Fig. 7 is the structural representation of the stator of this utility model embodiment；

Fig. 8 is the trimming enclasping force comparison diagram of stator.

Detailed description of the invention

With specific embodiment, this utility model is described in further detail below in conjunction with the accompanying drawings, but not as to this practicality Novel restriction.

Shown in Figure 3, according to embodiment of the present utility model, it is provided that a kind of stator, it is used for being arranged in motor, fixed Son processes through trimming, and the MgO-ZrO_2 brick of stator is less than 5, and the number of poles of motor is less than or equal to 12, the trimming number of stator Unequal with the number of poles of motor.

Fig. 1 shows the stator structure that a kind of number of trimming in the prior art is identical with motor pole number, and motor is 36 groove 4 poles Motor, the quantity of the trimming 20 of stator 10 is 4, can be by finding out in Fig. 1 that the trimming magnetic line of force is distributed, when closing in each electricity cycle Become magnetic potential to rotate be positioned at trimming simultaneously or be not positioned at trimming simultaneously, the flux linkage calculation value in Fig. 2 can be seen that magnetic linkage Asymmetric, three-phase current unbalance when motor runs, motor torque fluctuation strengthens, and 2 subharmonic occurs, and motor cannot normal table Run, as shown in Figure 5.

Fig. 3 shows the 36 groove 4 pole motors of the present embodiment, and trimming number is 6, when 36 groove 4 pole motor trimming numbers choose 6, Trimming magnetic line of force distribution, and the flux linkage calculation value shown in Fig. 4 as shown in Figure 3 can be seen that the magnetic linkage of motor is symmetrical, such as table 1 institute Show, and when combining shown in Fig. 4 it can be seen that the trimming number of stator 10 is equal with the number of poles of motor, magnetic linkage value asymmetric and Torque pulsation is maximum；When the trimming number of stator and the number of poles of motor are unequal, magnetic linkage value is symmetrical and torque pulsation reduces.

It is further preferred that the relation between trimming number and the number of poles of motor of stator is not for divide exactly mutually.It is to say, it is fixed The trimming number of son can not be divided exactly by the number of poles of motor, and the number of poles of motor can not be divided exactly by the trimming number of stator.Such as motor Number of poles when being 12, the trimming number of stator can not be 2,4,6,12 etc..In order to ensure the operation of motor normal table, the most excellent Choosing, the trimming number of stator is more than the number of poles of motor, and for example, number of poles of motor is 6, then stator trimming number can not be less than 6, Can not be namely 2,3, stator trimming number can be 7,8,9 etc..

The number of poles of motor is 4, and trimming number is 6 or 10.Do not divide exactly mutually between trimming number and the number of poles of motor of stator In the case of, torque pulsation can further be reduced, and as shown in table 1, when trimming number is 6 or 10, and progression is between 4 Belonging to the relation not divided exactly mutually, at this moment torque pulsation is less.When trimming number is 8, belongs between trimming number and progression and mutually may be used With the relation divided exactly, in this structure, magnetic linkage value is asymmetric, and torque pulsation is relative to the situation that trimming number is 6 or 10 Under bigger.

When stator being carried out trimming and processing, carry out symmetrical trimming, so that the trimming 20 of stator 10 is for be symmetrical arranged two-by-two. The trimming 20 of this symmetry can preferably reduce torque pulsation.

The facies tract of arbitrary phase shifts to install with motor in the trimming 20 of stator 10.As it is shown in fig. 7, trimming is in the length of cross section Choosing of degree L dimension is considered as the distribution of winding facies tract, and the facies tract of the arbitrary phase of motor should be dislocatedly distributed with trimming scope, it is to avoid motor Single-phase in facies tract is directed at trimming position all the time.

The trimming 20 of stator 10 central angle of correspondence in the cross section of stator isThe span of central angle is:

In the 36 groove 4 pole motors of Fig. 1,4 trimmings only affect the biphase magnetic circuit of B/C, and magnetic resistance biphase for B/C increases, magnetic linkage Value is less than A phase.On the contrary, seeing the present embodiment of Fig. 3, the magnetic linkage impact that A/B/C phase is produced by trimming is alternately, at electromagnetic field In the cycle rotated, trimming is consistent on the impact of A/B/C three-phase magnetic linkage, and therefore the numerical value of three-phase magnetic linkage is equal.

The depth of cut of the trimming of stator is D, and depth of cut D span is: D≤H/2, and wherein, H is stator yoke width Degree.Considering the close distribution of magnetic in motor relatively thin yoke portion, for not causing the big ups and downs that at trimming, magnetic is close when motor rotates, Fig. 6 shows Go out the close distribution of magnetic in motor relatively thin yoke portion, for not causing the big ups and downs that at trimming, magnetic is close when motor rotates, and combined Fig. 7, trimming bosom D span: D H/2.The deepest magnetic at trimming of trimming is close will be the biggest until saturated, and motor rotates Time the close change of magnetic at trimming big, reluctance torque change acutely causes torque ripple to increase.The cutting form of trimming here It is not limited only to straight line trimming, also includes that the trimming of other shapes, above-mentioned depth of cut refer to that trimming is near trench bottom nearest Distance between point and stator radius.

Stator contact area between the housing of motor is A, and the gross area of the outer surface of stator is B, wherein, A ≥0.7B.Consider when stator and housing add that man-hour, the magnitude of interference tended to lower deviation, the tangential force produced when motor runs and friction system The product of number, more than the enclasping force between matching object, can cause radially sliding of motor.The most defeated for ensureing motor torque Going out, the ratio of the gross area that stator contact area between the housing of motor accounts for the outer surface of stator should be not less than 0.7. As shown in Figure 8, when the ratio of A/B is higher than 0.7, part contact is less with Full connected enclasping force contrast reduction amplitude.

This utility model additionally provides a kind of motor, including the stator of above-described embodiment.It is less than 5 at MgO-ZrO_2 brick In motor (number of poles≤12), the trimming number of stator should be unequal with number of pole-pairs so that the composite magnetic power in each electricity cycle rotates Do not have and be positioned at trimming simultaneously or be not positioned at trimming simultaneously, so will not trigger motor magnetic circuit asymmetric, and electricity Three-phase balance when machine runs, the magnetic linkage of motor symmetrical, and torque pulsation reduce, make the motor can be with the fortune of normal table OK.

Certainly, it is above preferred implementation of the present utility model.It should be pointed out that, the ordinary skill for the art For personnel, on the premise of without departing from this utility model ultimate principle, it is also possible to make some improvements and modifications, these improve It is also considered as protection domain of the present utility model with retouching.

Claims

1. a stator, is used for being arranged in motor, and described stator processes through trimming, it is characterised in that described stator every Extremely every phase groove number is less than 5, and the number of poles of described motor is less than or equal to 12, the trimming number of described stator and the number of poles of described motor Unequal.

Stator the most according to claim 1, it is characterised in that between trimming number and the number of poles of described motor of described stator Relation for not divide exactly mutually.

Stator the most according to claim 2, it is characterised in that the trimming number of described stator is more than the number of poles of described motor.

Stator the most according to claim 1, it is characterised in that the number of poles of described motor is 4, described trimming number be 6 or 10。

Stator the most according to claim 4, it is characterised in that the trimming of described stator is for be symmetrical arranged two-by-two.

Stator the most according to claim 1, it is characterised in that the trimming of described stator and the phase of arbitrary phase in described motor Band shifts to install.

7. according to the stator described in claim 1 or 6, it is characterised in that the trimming of described stator is at the cross section of described stator The central angle of interior correspondence isThe span of described central angle is:

Stator the most according to claim 1, it is characterised in that the depth of cut of the trimming of described stator is D, described cutting Degree of depth D span is: D≤H/2, and wherein, H is stator yoke width.

Stator the most according to claim 1, it is characterised in that described stator contacting between the housing of described motor Area is A, and the gross area of the outer surface of described stator is B, wherein, A >=0.7B.

10. a motor, it is characterised in that include the stator according to any one of claim 1 to 9.