CN205489836U - Stator is towards piece, motor stator and use this motor stator's motor - Google Patents

Abstract

The utility model provides a stator is towards piece, motor stator and use this motor stator's motor. Stator (2) include: stator tooth (21) of a plurality of central symmetry one -tenth radiation, stator slot (22) that form between two adjacent stator tooth (21), wherein, the main part of stator tooth (21) has non - parallel configuration, leaves the yoke portion of stator (2) is near more, and the breadth of tooth is big more. According to the utility model discloses stator structure can bring the performance of motor into play, can both reach higher level in low -speed washing efficiency, the high -speed efficiency of dewatering to make the motor have enough big output torque, fully provided washing machine's job requirement.

Description

Stator punching, motor stator and apply the motor of this motor stator

Technical field

This utility model relates to motor, in particular to a kind of stator punching, motor stator and application The motor of this motor stator.

Background technology

For roller washing machine product in the market, determine its drive motor performance good and bad main In the efficiency that the motor in washing of drum type washing machine and two work process of dehydration can play.And along with washing The lifting of clothing machine quality, during laundry machine dehydration, the requirement to motor speed is more and more higher, this is because rotating speed The highest dehydrating effect is the best, but energy consumption of electrical machinery is the biggest.Thus existing motor dehydrating speed is general Below 16000 revs/min, the only high-end motor of part can have low speed and efficiency at a high speed concurrently, but this The manufacturing processing technic of motor is relatively complicated.

Utility model content

According to one side of the present utility model, it is provided that a kind of motor stator, comprising: multiple center pair Claim the stator tooth of radial arrangement, the stator slot formed between two adjacent stator tooths, wherein, The main body of stator tooth has non-parallel configuration, from the yoke portion of stator more close to, the facewidth is the biggest.

According to the motor stator of this utility model embodiment, alternatively, stator tooth main body non-parallel both sides Straight line extended line angle is more than 0 ° but no more than 10 °.

According to the motor stator of this utility model embodiment, alternatively, stator tooth main body with this tooth Angle between axis of symmetry is 3 °.

According to the motor stator of this utility model embodiment, alternatively, stator tooth is away from the end of stator yoke Portion is linear.

According to the motor stator of this utility model embodiment, alternatively, stator tooth is away from the end of stator yoke Portion has the length end face more than this stator tooth main body Breadth Maximum.

According to the motor stator of this utility model embodiment, alternatively, inclined bottom stator slot oblique shoulder Shape.

According to the motor stator of this utility model embodiment, alternatively, it is formed with groove at the edge of stator, And it is provided with salient point in this groove.

According to the motor stator of this utility model embodiment, alternatively, four edges at stator are respectively formed Fluted.

According to another aspect of the present utility model, it is provided that a kind of motor, it includes aforesaid motor stator.

According to another aspect of the present utility model, it is provided that a kind of motor, it includes aforesaid motor stator, And rotor, this rotor embeds the circular cavity in the middle part of stator, and rotor has the periphery of circle, and It is evenly distributed with multiple magnet steel groove along radial direction radial；One end of each magnet steel groove is close in and turns The rotary shaft of son, and form dovetail groove at this magnet steel groove near the other end of rotor outer periphery；Dovetail groove with Magnet steel groove is connected, and dovetail groove includes: dovetail groove cell body and dovetail groove end, wherein, and dovetail groove cell body Width less than the width of magnet steel groove, dovetail groove end has the circular arc portion of the periphery close to rotor.

According to the motor of this utility model embodiment, alternatively, stator tooth cooperatively forms with the periphery of rotor Minimal air gap be 0.4～0.6mm.

According to the motor of this utility model embodiment, alternatively, rotor has 8 poles, and stator has 12 Groove, or, rotor has 6 poles, and stator has 9 grooves.

According to the motor of this utility model embodiment, alternatively, each magnet steel groove of rotor embedded in monolithic Bar magnet, and adjacent magnet steel mask has identical polarity.

According to the motor of this utility model embodiment, alternatively, the material of the magnet steel of the magnet steel groove of rotor is embedded Matter be the material of ferrite, rotor and stator be model be the stalloy of DW470.

According to the motor of this utility model embodiment, alternatively, this motor is that washing machine drives motor.

According to another aspect of the present utility model, it is provided that a kind of stator punching, comprising: multiple center It is symmetrically the stator tooth structure of radial arrangement, the stator formed between two adjacent stator tooth structures Groove structure, wherein, the main body of stator tooth structure has non-parallel configuration, further away from the middle part of stator punching, Width is the biggest.

According to the stator punching of this utility model embodiment, alternatively, stator tooth structure is close to stator punching The end at middle part is linear.

According to the stator punching of this utility model embodiment, alternatively, stator tooth structure is close to stator punching The end at middle part has the length end face more than this stator tooth main structure body Breadth Maximum.

According to the stator punching of this utility model embodiment, alternatively, the bottom of stator slot structure is inclined Oblique shoulder.

According to the stator punching of this utility model embodiment, alternatively, the edge at stator punching is formed Groove, and it is provided with salient point in this groove.

Stator structure according to this utility model embodiment can by the performance of motor out, at low speed Detersive efficiency, high speed dewatering efficiency are attained by higher level, and make motor have sufficiently large output Torque, fully meets the job requirement of washing machine；Further, tie according to the rotor of this utility model embodiment Structure and stator structure cooperate, can lifting motor performance further, vibration when reducing high speed and making an uproar Sound and traveling comfort, improve washing machine quality, it is also possible to according to actually used situation, adjusts winding Parameter, meets the high low speed performance requirements of difference of motor for washer.

Accompanying drawing explanation

In order to be illustrated more clearly that the technical scheme of this utility model embodiment, attached by embodiment below Figure is briefly described, it should be apparent that, the accompanying drawing in describing below merely relates to of the present utility model one A little embodiments, rather than to restriction of the present utility model.

Fig. 1 schematically shows the structure of the rotor according to this utility model embodiment, Figure 1A It is the partial enlarged view of Fig. 1 with Figure 1B；Fig. 1 C schematically shows at the motor shown in Fig. 1 Rotor structure loads the structure after magnet steel；

Fig. 2 schematically shows the structure of the motor stator according to this utility model embodiment, Fig. 2 A It is the partial enlarged view of Fig. 2 with Fig. 2 B；

Fig. 3 is that the motor rotor construction shown in Fig. 1 cooperates with the motor stator structure shown in Fig. 2 Schematic diagram, Fig. 3 A is the partial enlarged view of Fig. 3, after Fig. 3 B is structure shown in magnet steel load map 3 Schematic diagram；

Fig. 4 A is the three-dimensional view of the motor stator shown in Fig. 2, and Fig. 4 B is rotor shown in Fig. 1 and Fig. 2 The three-dimensional view that shown stator cooperates, Fig. 4 C is also the three-dimensional view of the motor stator shown in Fig. 2.

Reference

1 rotor

11 dovetail grooves

111 dovetail groove ends

112 dovetail groove cell bodies

12 bar-shaped troughs

13,13A, 13B boss

2 stators

21 stator tooths

211 stator tooth end

22 stator slots

23 salient points

Detailed description of the invention

For making the purpose of this utility model embodiment, technical scheme and advantage clearer, below in conjunction with The accompanying drawing of this utility model embodiment, carries out clear, complete to the technical scheme of this utility model embodiment Ground describes.Obviously, described embodiment is a part of embodiment of the present utility model rather than all Embodiment.Based on described embodiment of the present utility model, those of ordinary skill in the art without The every other embodiment obtained on the premise of creative work, broadly falls into the model of this utility model protection Enclose.

Unless otherwise defined, technical term used herein or scientific terminology should be this utility model institute There is in genus field the ordinary meaning that the personage of general technical ability is understood.This utility model patent application explanation " first ", " second " and the similar word that use in book and claims are not offered as any suitable Sequence, quantity or importance, and be used only to distinguish different ingredients.Equally, " one " or Similar words such as " one " does not indicates that quantity limits yet, but represents and there is at least one.

According to embodiment of the present utility model, disclose a kind of be applicable to permanent magnetism that washing machine drum drives with Step motor, specifically, this motor includes: the rotor of built-in tangential magnetic structure and coordinating with it Stator structure, the result that this motor rotor construction and rotor coordinate with stator can be by the performance of motor Bring into play so that low speed detersive efficiency and high speed dewatering efficiency can keep higher level, reduce and damage Consumption, improves washing machine quality.

Fig. 1 schematically shows the structure of the rotor according to this utility model embodiment, Figure 1A Being the partial enlarged view of Fig. 1 with Figure 1B, Fig. 1 C schematically shows at the motor shown in Fig. 1 Rotor structure loads the partial structurtes after magnet steel.

Fig. 1 is the front view of the rotor structure being not embedded into magnet steel.Specifically, motor as shown in Figure 1 Rotor structure is the most rounded, say, that have the periphery of circle；Uniformly divide at this circular configuration Being furnished with eight to be used for placing magnet steel along the bar-shaped trough 12 of radial direction radial, such as, this magnet steel can To be the monolithic bar magnet of shape and the mating shapes of bar-shaped trough 12, for multiple bar-shaped trough 12 phases The mask of adjacent magnet steel has identical polarity, thus forms the closed-loop path of motor main field, this adjacent magnetic Steel mask has the magnet steel distribution of identical polar can strengthen magnetic field, thus is applicable to bigger electric current, carries High motor expansion speed scope, is also less prone to demagnetization；One end of each bar-shaped trough 12 is close in the rotation of rotor 1 Axle, and form dovetail groove 11 at the bar-shaped trough 12 other end near rotor 1 surface；Dovetail groove 11 is main It is used for, every magnetic and fixing magnet steel, air-gap flux amount size to be affected simultaneously.Additionally, from another angle Degree, the shape of bar-shaped trough 12 also with magnet steel mating shapes, therefore for other shapes of magnet steel, Other shapes of magnet steel groove outside can also using rectangle.

Figure 1A is the partial enlarged view of Fig. 1, it is shown that an oat tail groove structure 11.Such as Figure 1A institute Showing, dovetail groove 11 is formed at bar-shaped trough 12 one end near rotor surface, namely close to stator One end.Dovetail groove 11 is connected with bar-shaped trough 12.Dovetail groove 11 includes dovetail groove cell body 112 and swallow Stern notch end 111.As shown in Figure 1A, the width of dovetail groove cell body 112 is less than the width of bar-shaped trough 12, Then bar-shaped trough 12 near the width of the opening of one end of rotor surface less than the width of bar-shaped trough 12 main body, Such that it is able to it is fixedly embedded to the magnet steel within bar-shaped trough 12.

Dovetail groove cell body 112 shown in Figure 1A be shaped as rectangle, i.e. dual-side is perpendicular to bar-shaped trough The connection limit of 12, alternatively, dovetail groove cell body 112 can also have other shape, if this cell body The minigroove insied width of 112 is less than the groove insied width of bar-shaped trough 12 main body, namely makes described connection dovetail The width of the opening of groove 11 and bar-shaped trough 12 is less than the width of magnet steel, it is possible to in bar-shaped trough 12 Magnet steel plays fixation.

Dovetail groove end 111 has circular arc portion, and this circular arc portion is close to the rounded outer surface of rotor 1. Owing to the centrosymmetry of bar-shaped trough 12 and dovetail groove 11 is distributed so that each dovetail groove end 111 each From circular arc portion have equal distance about the outer surface of rotor 1.The arc sections of dovetail groove end 111 Dividing the space between rotor 1 outer surface is that magnetic flux provides path so that the magnet steel in bar-shaped trough 12 The magnetic line of force sent forms loop；In theory, this space is the narrowest, and length is the longest, the most easily makes magnetic Road is saturated, thus reduces flux leakage.In figure ia, H1 represents the circular arc from dovetail groove end 111 Part and rotor outer surface between gap, this gap can be dovetail groove end 111 circular arc portion with Minimum perpendicular distance between rotor outer surface, if circular arc portion forms concentric circular with rotor outer surface, So circular arc portion arbitrfary point is identical to the vertical dimension of rotor outer surface.Ensureing that rotor edge props up In the case of support intensity, from the point of view of reducing leakage field, dovetail groove is the least with the gap of rotor outer surface The best.Such as, dovetail groove can be 0.4-0.6mm with the gap of rotor surface, preferably takes 0.5mm. It addition, as it was previously stated, dovetail groove 11 is the longest with the space of rotor surface, flux leakage more can be reduced, Therefore, it can consider to lengthen the length of the circular arc portion of dovetail groove 11 end as far as possible, but circular arc portion Width no more than the width of bar-shaped trough 12.This is because, on the one hand, if width is long, meeting Reducing the connection support strength at rotor outer periphery edge, being simultaneously fabricated into this also can increase；On the other hand, if The width of circular arc portion continues to lengthen, and there will not be for magnetism isolating effect and is obviously improved.

From the angle of minimizing leakage field, the height of dovetail groove 11 can not be too big, because dovetail groove end 111 The periphery of circular arc portion can form the edge effect of magnetic circuit, the utilization rate of magnet steel generally speaking can be made to drop Low so that the magnetic flux entering stator tooth reduces.In figure ia, H2 represent the height of dovetail groove 11 with The circular arc portion of dovetail groove 11 and the gap H1 sum of rotor outer surface.Because it is whole for dovetail groove 11 For the height of body, keeping in the case of intensity, the least more be conducive to increasing magnetic flux, therefore may be used It is set to no more than 3mm with the height of dovetail groove 11 entirety by including end 111 and cell body 112. Such as, for the structure shown in Figure 1A, if the gap H1 of dovetail groove and rotor surface is chosen to be 0.5mm, can arrange H2 is 2mm, and so corresponding dovetail groove height is 1.5mm.

With reference to Fig. 1 and Figure 1B, it is formed with boss 13 at bar-shaped trough 12 away from one end of rotor outer surface, Such as 13A and 13B in Figure 1B.Owing to bar-shaped trough 12 is hollow out, actually this boss is formed Outer peripheral portion at the cirque structure of rotor 1 central part.As it was previously stated, load the magnetic of bar-shaped trough 12 Steel along the one end in rotor radial direction by the open communication structure between dovetail groove 11 and bar-shaped trough 12 Spacing, at this magnet steel along spacing by boss 13 of the other end in rotor radial direction, thus realize existing Rotor radial direction is fixed for magnet steel in bar-shaped trough 12；Simultaneously bar-shaped trough 12 be parallel to rotor The both sides inwall of radial direction is used for fixing magnet steel now perpendicular on the direction of rotor radial in fact.

Boss 13 is except playing the position-limiting action to magnet steel, it is also possible to be used for reducing leakage field, improves magnet steel Utilization rate.This is because, if being not provided with boss, magnet steel will directly contact with the annulus in the middle part of rotor, Then the magnetic flux of magnet steel will form loop along annulus, because magnetic flux always moves to the direction that magnetic resistance is little, The magnetic flux entering stator tooth is caused to strongly reduce.Owing to boss 13 size is little, and with magnet steel central shaft position Put the contact that offsets, thus essentially without leakage field occurs.If the magnet steel loading rotor bar-shaped trough 12 is Monoblock, then can be through bar-shaped trough 12 for fixing the boss 13 of magnet steel.

Fig. 1 is the top view of rotor, it can be seen that rotary shaft hole, bar-shaped trough, dovetail groove etc. are through Structure.Alternatively, rotor is by multiple lamellas with identical profile as shown in Figure 1 and structure Superposition is formed.The bar-shaped trough, the degree of depth of dovetail groove that are formed after superposition highly match with the insertion of magnet steel. If as it was previously stated, boss 13 is not through in bar-shaped trough 12, then formed for multiple lamella superpositions For rotor, it is not necessary to each lamella has boss 13.

In the case of ensureing that boss 13 is for the support strength of magnet steel, rectangle, triangle can be designed to The various shape such as shape, semicircle.In Figure 1B, boss 13A is semicircle, and boss 13B is rectangle. Comparison diagram 1 understands, in the rotor structure shown in Fig. 1, in addition to a boss is semicircle, other Boss be rectangle.This boss uses the shape different from other boss, is to identify rotor direction. Specifically, the concordance in video disc direction is can ensure that when carrying out the closed assembly of rotor punching.It is to say, Owing to punching processing exists error, therefore punching structurally there may be trickle unsymmetry, for Multiple punchings that equal dies and pressing equipment are made, make each punching when closed assembly with add man-hour formed Direction is consistent, is possible to prevent the amplification of mismachining tolerance.Additionally, if it find that punching is problematic, it is also possible to Find out which position existing problem on processing mold.

Fig. 2 schematically shows the structure of the motor stator according to this utility model embodiment, Fig. 2 A It is the partial enlarged view of Fig. 2 with Fig. 2 B.Fig. 2 is the stator structure according to this utility model embodiment Front view, the shown in this figure stator core construction not being wound around winding.Specifically, such as Fig. 2 Shown in, stator structure includes the stator tooth 21 that multiple centrosymmetry arranges, at two adjacent stator tooths Form a stator slot 22 between 21, thus stator tooth 21 and stator slot 22 are staggered.

The most as best seen in figs. 2 and 2, the main body of stator tooth 21 has non-parallel configuration, namely Saying, the both sides of tooth main body have a certain degree, and from stator yoke more close to, the facewidth is the biggest, this Plant structure and be on the one hand possible to prevent the close local supersaturation of magnetic in load conditions, improve motor output torque, On the other hand the area of stator slot be can increase, the number of turn and the needs in line footpath met.Preferably, tooth main body The straight line extended line angle on non-parallel both sides is more than 0 ° but no more than 10 °.Due to stator tooth axial symmetry, Therefore, tooth main body and angle between tooth axis of symmetry be not more than 5 °.It is highly preferred that such as Fig. 2 and Shown in Fig. 2 A, use 3 °.

On the other hand, as best seen in figs. 2 and 2, stator tooth end has length more than stator tooth main body The end face of part Breadth Maximum, so so that this end face matches with the excircle of rotor 1, is formed Longer interstitial structure, can increase air gap flux density, improves motor performance.Alternatively, stator tooth end with The minimal air gap that rotor outer periphery cooperatively forms is 0.4～0.6mm, such as, for 0.5mm.

Optionally, in addition, stator tooth end can be linear, so make stator tooth end 211 with The circular circumference structure of rotor match formed non-uniform air-gap, as shown in Fig. 3 and Fig. 3 A, thus Harmonic content can be reduced, the vibration of motor when reducing high speed, noise and torque pulsation, improve motor Reliability and efficiency.

As in figure 2 it is shown, oblique shoulder inclined bottom stator slot 22, this structure be conducive to machine around Line, improves stator slot utilization rate.

Due to stator 2 be typically by the riveting of multiple mutually isostructural stator lamination stackings formed (such as Fig. 4 C Shown in), for preventing because riveting bad punching disengagement, each stator punching can be welded together.In Being to form groove at the edge of stator structure, and arrange salient point in groove, this salient point rushes for stator Welding between sheet；Specifically, described salient point is used for as the initial fixation point of solder, described groove Accommodate the solder that stays after welding, the most both so that solder set more firm, it is fixed to destroy again The overall peripheral shape of son and outward appearance.

Alternatively, as shown in Fig. 2 and Fig. 4 A, the four edges edge at stator punching is respectively provided with salient point 23, Then a long boss structure being made up of multiple salient points can be respectively formed in each side of stator, thus Welding is all realized in four sides of stator.

Fig. 3 is that the motor rotor construction shown in Fig. 1 cooperates with the motor stator structure shown in Fig. 2 Schematic diagram, Fig. 3 A is the partial enlarged view of Fig. 3, after Fig. 3 B is structure shown in magnet steel load map 3 Schematic diagram；Fig. 4 B is the three-dimensional view that rotor shown in Fig. 1 cooperates with stator shown in Fig. 2.As Shown in Fig. 3, rotor 1 is embedded in the circular cavity in the middle part of stator 2, it is possible to around drive shaft fixed Rotate in son 2.Motor according to this utility model embodiment can use simultaneously aforesaid rotor structure and Stator structure.More specifically, this motor can use and have dovetail groove and dovetail groove end has circular arc The rotor structure of shape and stator tooth end are rectilinear stator structure so that stator tooth end and rotor Non-uniform air-gap between periphery, can reduce harmonic content, the vibration of motor, noise when reducing high speed And torque pulsation, improve reliability and the efficiency of motor.

On the other hand, according to the motor scheme of this utility model embodiment, by the pole groove of rotor Yu stator Number cooperation meets power requirement.In the shown electric machine structures such as Fig. 3, Fig. 3 A, Fig. 3 B, use 8 pole 12 groove structures, for three phase electric machine, MgO-ZrO_2 brick is 12/8*3=0.5, for point Number grooves, i.e. every 2 extremely under, be respectively arranged with 1 winding mutually, motor winding is centralized winding, concentrate Formula winding is more beneficial for machine automatic winding.Therefore, this motor is that pole groove is concentrated than the fractional-slot being 2/3 Winding.Alternatively, according to other embodiments of the present utility model, it would however also be possible to employ other pole groove than and / or number of poles and groove number.For three phase electric machine, for ensureing that each phase winding of motor is symmetrical, groove number must be 3 Multiple, number of poles is certainly for even number.Thus, it would however also be possible to employ the scheme of 6 pole 9 grooves, pole groove now It is 2/3 than also, and motor size can also meet the requirement of micro-machine.According to of the present utility model Embodiment, such as, magnet steel material is ferrite, and rotor and stator material are all stalloy.This stalloy Model such as DW470, it is ensured that between dovetail groove end and rotor outer periphery portion part and rotor The intensity of bar-shaped trough boss.

Motor according to this utility model embodiment can be a kind of permanent magnetism with built-in tangential magnetic circuit Synchronous motor, it is possible to for the drum driven of washing machine.

Rotor structure according to this utility model embodiment can play the performance of motor so that low speed washs Efficiency and high speed dewatering efficiency can keep higher level, reduce loss, improve washing machine quality；Root Can also by the performance of motor out wash at low speed according to the stator structure of this utility model embodiment Efficiency, high speed dewatering efficiency are attained by higher level, and make motor have sufficiently large output torque, Fully meet the job requirement of washing machine；Further, according to the rotor structure of this utility model embodiment and fixed Minor structure cooperates, can lifting motor performance further, vibration when reducing high speed and noise and fortune The stationarity of row, improves washing machine quality, it is also possible to according to actually used situation, adjusts winding parameter, Meet the high low speed performance requirements of difference of motor for washer.

Rotor structure according to this utility model embodiment and stator structure, all can be by by customization Punching sheet unit closed assembly is formed, and adds for the rotor punching according to this utility model embodiment and stator punching Work technique is simple, and reliability is high, it is simple to batch production.

The above is only exemplary embodiment of the present utility model, not for limiting this utility model Protection domain, protection domain of the present utility model is determined by appended claim.

Claims (20)

1. a motor stator (2),

It is characterized in that,

Described stator (2) including: the stator tooth (21) of multiple centrosymmetry radials arrangement, in phase The stator slot (22) formed between two adjacent stator tooths (21),

Wherein,

The main body of described stator tooth (21) has non-parallel configuration, from the yoke portion of described stator (2) more Closely, the facewidth is the biggest.

Motor stator the most according to claim 1 (2), it is characterised in that described stator tooth (21) The straight line extended line angle on the non-parallel both sides of main body is more than 0 ° but no more than 10 °.

Motor stator the most according to claim 1 and 2 (2), it is characterised in that described stator tooth (21) main body while and angle between this tooth (21) axis of symmetry be 3 °.

Motor stator the most according to claim 1 (2), it is characterised in that described stator tooth (21) End away from described stator (2) yoke portion is linear.

Motor stator the most according to claim 1 (2), it is characterised in that described stator tooth (21) End away from described stator (2) yoke portion has length more than this stator tooth (21) main body Breadth Maximum End face.

Motor stator the most according to claim 1 (2), it is characterised in that described stator slot (22) The oblique shoulder that bottom is inclined.

Motor stator the most according to claim 1 (2), it is characterised in that in described stator (2) Edge be formed with groove, and be provided with salient point in this groove.

Motor stator the most according to claim 1 (2), it is characterised in that in described stator (2) Four edges be each formed with described groove.

9. a motor, it is characterised in that this motor includes according to according to any one of claim 1-8 Stator (2).

10. a motor,

It is characterized in that,

Described motor includes:

According to the stator (2) according to any one of claim 1-8, and rotor (1), this rotor (1) Embed the circular cavity at described stator (2) middle part,

Described rotor (1) has the periphery of circle, and is evenly distributed with multiple along radial direction one-tenth Radial magnet steel groove (12)；

One end of each described magnet steel groove (12) is close in the rotary shaft of described rotor (1), and This magnet steel groove (12) other end near described rotor (1) periphery forms dovetail groove (11)；

Described dovetail groove (11) is connected with described magnet steel groove (12),

Described dovetail groove (11) including: dovetail groove cell body (112) and dovetail groove end (111),

Wherein, the width of described dovetail groove cell body (112) is less than the width of described magnet steel groove (12), Described dovetail groove end (111) has the circular arc portion of the periphery close to described rotor (1).

11. motors according to claim 10, it is characterised in that described stator tooth (21) and institute Stating the minimal air gap that the periphery of rotor (1) cooperatively forms is 0.4～0.6mm.

12. motors according to claim 10, it is characterised in that described rotor (1) has 8 Pole, described stator (2) has 12 grooves, or, described rotor (1) has 6 poles, described stator (2) there are 9 grooves.

13. motors according to claim 10, it is characterised in that described rotor (1) each Described magnet steel groove (12) embedded in monolithic bar magnet, and adjacent magnet steel mask has identical polarity.

14. motors according to claim 10, it is characterised in that embed described rotor (1) The material of the magnet steel of described magnet steel groove (12) is ferrite, described rotor (1) and described stator (2) Material be model be the stalloy of DW470.

15. according to the motor described in any one of claim 10-14, it is characterised in that described motor is Washing machine drives motor.

16. 1 kinds of stator punchings,

It is characterized in that,

Described stator punching includes: the stator tooth structure (21) of multiple centrosymmetry radials arrangement, The stator slot structure (22) formed between two adjacent stator tooth structures (21),

Wherein,

The main body of described stator tooth structure (21) has non-parallel configuration, further away from described stator punching (2) Middle part, width is the biggest.

17. stator punchings according to claim 16, it is characterised in that described stator tooth structure (21) it is linear close to the end in the middle part of described stator punching.

18. stator punchings according to claim 16, it is characterised in that described stator tooth structure (21) there is length more than this stator tooth structure (21) main body close to the end in the middle part of described stator punching The end face of Breadth Maximum.

19. stator punchings according to claim 16, it is characterised in that described stator slot structure (22) the oblique shoulder that bottom is inclined.

20. stator punchings according to claim 16, it is characterised in that at described stator punching Edge is formed with groove, and is provided with salient point in this groove.