CN208754086U - Synchronous motor and the compressor for using the synchronous motor - Google Patents

Abstract

The utility model provides a kind of synchronous motor and compressor, the quantity of double wedge is 9, and 9 double wedges are provided at circumferentially spaced in the interior lateral edge yoke portion in yoke portion, and the inner end of double wedge is equipped with tooth boots；Winding is wound around on double wedge, the coil of three adjacent tooths constitutes a phase of winding in winding, double wedge is divided into 3 phases, and each coil is across only a double wedge, three double wedges for forming a phase include the first double wedge and the second double wedge for being located in the middle intermediate double wedge, being located at intermediate double wedge two sides, and are set gradually by the second double wedge of the direction of rotation of rotor, intermediate double wedge and the first double wedge；Wherein, it is Ws that farthest point of the tooth boots boots point far from diameter of stator bore, which is connected to the distance between the farthest point of tooth boots root far from diameter of stator bore to tooth boots, and the length of tooth boots boots point is TGD, and the maximum radial thickness of the tooth boots of intermediate double wedge is W1, then:Synchronous motor provided by the utility model can effectively reduce the uneven electromagnet pull of synchronous motor, reduce vibration noise of motor.

Description

Synchronous motor and the compressor for using the synchronous motor

Technical field

The utility model relates to compressor fields, more specifically, are related to a kind of synchronous motor and including the synchronous motor Compressor.

Background technique

In the existing rotary DC frequency-changeable compressor using magneto, three-phase motor generallys use built-in type permanent-magnet electricity Motivation, usually on the double wedge that stator winding is wrapped in motor.The number of magnetic poles of magnet used in rotor core and fixed The quantity of pilot trench is 2:3 under normal circumstances, and stator tooth (double wedge), rotor magnetic pole circumferentially equidistantly distributed, but due to it Winding coefficient is low, and there are bottlenecks for motor energy efficiency promotion.If motor use structural unit for 1 proximal pole slot cooperate, can have compared with High winding coefficient reduces copper wastage, can effectively promote electric efficiency.But such motor usually exist it is intrinsic not Balanced electromagnetic power, and then vibrating noise is generated, so that the sense of hearing of motor is poor.Magnetic flux would generally be along the passed through length of magnetic path most Short direction walking, can generate if having magnetic flux to pass through in electric machine rotor air gap, between rotor and be distributed along air gap circumferencial direction Radial force, the effective air gap length for passing through it shorten.When air-gap field is unevenly distributed, synthesis radial force is not 0, at this time Unbalanced magnetic pull can be generated.The presence of the power will bring many negative effects to the operation of motor, cause motor oscillating and Noise reduces efficiency and shortens the working life.The generation of unbalanced magnetic pull is traced it to its cause and is commonly referred to be by specific slot number Caused by two aspect of installation operation when inherent shortcoming and the motor processing of the motor body of cooperation.

Utility model content

The utility model aims to solve at least one of the technical problems existing in the prior art.

For this purpose, the first aspect of the utility model is designed to provide a kind of synchronous motor.

The second aspect of the utility model is designed to provide a kind of compressor including above-mentioned synchronous motor.

To achieve the above object, the technical solution of the first aspect of the utility model provide it is a kind of determine synchronous motor, It include: stator, stator winding, rotor；The rotor includes rotor core, and the rotor core includes rotor punching and multiple magnetic Iron slot, all along the circumferentially-spaced distribution of the rotor core, several permanent magnets are inserted correspondingly into for the magnet slots In multiple magnet slots, the number of magnetic poles of rotor and the absolute value of the difference of slot number are 1；The stator includes: the yoke portion of annular And double wedge, the quantity of the double wedge is 9, and 9 double wedges yoke portion described in the interior lateral edge in the yoke portion is circumferentially-spaced The inner end of setting, the double wedge is equipped with tooth boots；The stator winding is wound around on the double wedge, and the double wedge is divided into 3 Phase, and each coil, across only a double wedge, three double wedges for forming a phase include being located in the middle centre Double wedge, the first double wedge and the second double wedge for being located at the intermediate double wedge two sides；Wherein, tooth boots boots point is far from diameter of stator bore The distance between the farthest point of farthest point to tooth boots root far from diameter of stator bore is Ws, and the length of the tooth boots boots point is TGD, institute The maximum radial thickness for stating the tooth boots of intermediate double wedge is W1, then:

The stator that the utility model above-mentioned technical proposal provides is guaranteeing manufacturing not by the restriction to Ws, W1, TGD Under the premise of with change, the uneven electromagnet pull of synchronous motor can be effectively reduced, and then reduce vibration noise of motor, improved Sense of hearing provides quality preferable synchronous motor.

In addition, the stator that the utility model above-mentioned technical proposal provides also has following additional technical feature:

In above-mentioned technical proposal, it is preferable that the second double wedge described in the direction of rotation by the rotor, the intermediate double wedge and First double wedge is set gradually；The maximum radial thickness of the tooth boots of first double wedge is W2, second double wedge The maximum radial thickness of tooth boots is W3, then: 0.45≤W1/W2≤1.85,0.45≤W1/W3≤1.75.

W1/W2 can be but be not limited to 0.45,0.75,1.00,1.35,1.65 or 1.85；W1/W3 can be but unlimited In 0.45,0.75,1.00,1.35,1.65 or 1.75.

In above-mentioned technical proposal, it is preferable that the smallest radial of the tooth boots of the intermediate double wedge with a thickness of W1min, 1.4≤ W1/W1min≤3.2。

With the variation of the maximum radial thickness of the tooth boots of intermediate double wedge, the smallest radial of the tooth boots of intermediate double wedge is thick Degree size also has to make as the variation of same trend, just can guarantee that magnetic flux passes through, can make back-emf, air gap magnetic density waveform Aberration rate in preferably range.

In above-mentioned technical proposal, it is preferable that W1 meets 2.4mm≤W1≤4.7mm.

W1 can be but be not limited to 2.4mm, 2.9mm, 3.4mm, 3.7mm, 4.2mm or 4.7mm.

In above-mentioned technical proposal, it is preferable that the width of the double wedge is Wt, 0.25≤W1/Wt≤0.85.

W1/Wt can be but be not limited to 0.25,0.45,0.65 or 0.85.

In above-mentioned technical proposal, it is preferable that the tooth boots of the intermediate double wedge are asymmetric along the axis of the intermediate double wedge, no The tooth boots of symmetric shape can equally reach preferable back-emf and promote effect, and then reduce copper loss, raising efficiency, specifically not Two-part length (the center of circle corresponding to two parts that can be symmetrically divided into for the tooth boots of intermediate double wedge by the axis of intermediate double wedge Angle) different and/or thickness difference；And/or the tooth boots of first double wedge are asymmetric along the axis of first double wedge, it is not right Claim the tooth boots of shape that can equally reach preferable back-emf and promote effect, and then reduce copper loss, raising efficiency is not specifically right It can be referred to as the two-part length (center of circle corresponding to two parts that the tooth boots of intermediate double wedge are divided by the axis of intermediate double wedge Angle) different and/or thickness difference；And/or the tooth boots of second double wedge are asymmetric along the axis of second double wedge, it is not right Claim the tooth boots of shape that can equally reach preferable back-emf and promote effect, and then reduce copper loss, raising efficiency is not specifically right It can be referred to as the two-part length (center of circle corresponding to two parts that the tooth boots of intermediate double wedge are divided by the axis of intermediate double wedge Angle) different and/or thickness difference.

In above-mentioned technical proposal, it is preferable that the number of poles of the synchronous motor is equal to 10, i.e. the number of magnetic poles of rotor is 10.When So, the number of poles of synchronous motor can also be 8,12 etc..

In above-mentioned technical proposal, it is preferable that the direction of winding of the coil in a phase on the adjacent double wedge is opposite.

Synchronous motor with 9 double wedges, 9 double wedges are divided into 3 phases with every 3 adjacent double wedges for 1 phase, Constituting U phase, V phase, each phase of W phase has 3 double wedges, including being located in the middle intermediate double wedge, be located at intermediate double wedge The first double wedge and the second double wedge of two sides, are wound in the direction that intermediate double wedge coil is arranged in, and are wound in setting the One double wedge and the coil on the second double wedge it is contrary.In 3 double wedges for constituting U phase, intensively configured with composition U phase Winding.Equally, in 3 double wedges for constituting V phase, intensively configured with the winding for constituting V phase, in 3 double wedges for constituting W phase, collection Middlely configured with the winding for constituting W phase.

In above-mentioned technical proposal, it is preferable that the number of poles of the rotor is 10 poles, forms 10 pole, 9 slot with 9 double wedges Synchronous motor.Calculated by finite element numerical it can be concluded that, for the synchronous motor of 10 pole rotors, use the utility model can be with With smaller unbalanced magnetic pull, low frequency noise can be significantly reduced.

In above-mentioned technical proposal, it is preferable that the sum of width of the permanent magnet under every magnetic pole be bm, the stator it is interior Diameter is Di, and the number of pole-pairs of the rotor is P, then 0.75≤bm × 2P/ (π × Di)≤0.9.

Meet 0.75≤bm × 2P/ (π × Di)≤0.9 with the width of permanent magnet and number of pole-pairs, permanent magnet benefit may be implemented With rate highest, cost performance is optimal.

In above-mentioned technical proposal, it is preferable that the rotor is tangential rotor, the iron that the adjacent permanent magnet surrounds out Core region is magnetic pole.

In above-mentioned technical proposal, it is preferable that the nominal torque T of the synchronous motor, the internal diameter Di of the stator and described The torque per unit volume TPV of rotor meets 5.18 × 10^-7≤T×Di^-3×TPV^-1≤1.17×10^-6, wherein described specified turn The unit of square T is Nm, and the unit of the internal diameter Di of the stator is mm, and the unit of the torque per unit volume TPV is kNm m^-3, the value range of the torque per unit volume TPV is 5kNmm^-3≤TPV≤45kN·m·m^-3。

Define the combination of the torque per unit volume TPV of the nominal torque T of magneto, the internal diameter Di of stator and rotor The value range of variable also defines the value range of torque per unit volume TPV, so that the magneto can satisfy compressor The power demand in field can effectively reduce rotor leakage accordingly for the magneto and compressor using the stator and rotor Magnetic increases permanent magnet utilization rate, promotes electric efficiency.

In above-mentioned technical proposal, it is preferable that magnetic pole d axis two sides circular arc is formed using rotation center as the whole section of circular arc in the center of circle, The corresponding central angle of the circular arc is α 1, and pole span angle is α 2, wherein 1/ α 2 >=0.5 of α, wherein crossing magnet slot symmetrical center line and turning The straight line of subcenter is set as d axis.

1/ α 2 >=0.5 of α, can provide enough main fluxs, while can satisfy manufacturing requirement.

The technical solution of the utility model the second aspect provides a kind of compressor, the technical side including such as first aspect Synchronous motor described in any one of case.

The compressor that the technical solution of the utility model the second aspect provides, because of the technical solution including first aspect Any one of described in synchronous motor, thus synchronous motor described in any one of technical solution with first aspect is complete Portion's beneficial effect, details are not described herein.

The additional aspect and advantage of the utility model will become obviously in following description section, or practical new by this The practice of type is recognized.

Detailed description of the invention

The above-mentioned and/or additional aspect and advantage of the utility model from the description of the embodiment in conjunction with the following figures will Become obvious and be readily appreciated that, in which:

Fig. 1 is the structural schematic diagram of stator described in one embodiment of the utility model；

Fig. 2 is the structural schematic diagram of 10 pole rotors described in one embodiment of the utility model；

Fig. 3 is the structural schematic diagram of rotor described in one embodiment of the utility model；

Fig. 4 is the structural schematic diagram of rotor described in another embodiment of the utility model；

Fig. 5 is the structural schematic diagram of tangential rotor described in one embodiment of the utility model；

Fig. 6 is the structural schematic diagram of the part of stator described in one embodiment of the utility model, wherein intermediate double wedge Tooth boots are asymmetric；

Fig. 7 is the structural schematic diagram of the part of stator described in one embodiment of the utility model, wherein the first double wedge Tooth boots, the tooth boots of the second double wedge are asymmetric；

Fig. 8 is the schematic cross-sectional view of compressor described in one embodiment of the utility model.

Wherein, corresponding relationship of the Fig. 1 into Fig. 8 between appended drawing reference and component names are as follows:

1 stator, 11 yoke portions, 12 double wedges, 13 intermediate double wedges, 14 first double wedges, 15 second double wedges, 16 coils, 17 tooth boots, 171 tooth boots roots, 172 tooth boots boots points, 2 rotors, 3 permanent magnets, 100 compressors, 10 synchronous motors.

Specific embodiment

In order to be more clearly understood that the above objects, features, and advantages of the utility model, with reference to the accompanying drawing and have The utility model is further described in detail in body embodiment.It should be noted that in the absence of conflict, this Shen The feature in embodiment and embodiment please can be combined with each other.

Many details are explained in the following description in order to fully understand the utility model, still, this is practical It is novel to be implemented using other than the one described here mode, therefore, the protection scope of the utility model not by The limitation of following public specific embodiment.

Synchronous motor and compressor according to some embodiments of the utility model is described with reference to the accompanying drawings.

As shown in Figure 1, a kind of synchronous motor provided according to some embodiments of the utility model, comprising: stator 1, stator Winding, rotor 2.Rotor 2 includes rotor core, and rotor core includes rotor punching and magnet slot, and whole magnet slots edges turn The circumferentially-spaced distribution of sub- iron core, several permanent magnets 3 are inserted correspondingly into multiple magnet slots, the number of magnetic poles of rotor and slot number it Absolute value of the difference is 1；Stator 1 includes: yoke portion 11 and double wedge 12, and in a ring, the quantity of double wedge 12 is 9, and 9 in yoke portion 11 Double wedge 12 is provided at circumferentially spaced in the interior lateral edge yoke portion 11 in yoke portion 11, and the inner end of double wedge 12 is equipped with tooth boots 17；Stator winding around It is located on double wedge 12, double wedge 12 is divided into 3 phases, and each coil 16 forms three double wedges of a phase across only a double wedge 12 include the first double wedge 14 and the second double wedge 15 for being located in the middle intermediate double wedge 13, being located at intermediate 13 two sides of double wedge；Its In, farthest point the distance between of 172 farthest point far from diameter of stator bore of tooth boots boots point to tooth boots root 172 far from diameter of stator bore For Ws, 172 farthest point far from diameter of stator bore of tooth boots boots point refers to that the rotation center on tooth boots boots point apart from rotor is farthest Point, 172 farthest point far from diameter of stator bore of tooth boots root refer to point farthest apart from the rotation center of rotor on tooth boots root, The length of tooth boots boots point 172 is TGD, and the maximum radial thickness of the tooth boots of intermediate double wedge 13 is W1, then:

Stator 1 includes the yoke portion 11 of annular, is distributed centered on rotation center and on the circumferencial direction in yoke portion 11 convex Tooth 12, and double wedge 12 is located at the inside in yoke portion 11,12 quantity of double wedge is 9.Stator 1 also includes winding, in winding three it is adjacent The coil 16 of double wedge 12 constitutes a phase of winding, and each coil 16 is across only a double wedge 12.Form three double wedges of a phase In 12, the maximum radial thickness of intermediate double wedge 13, the first double wedge 14 of two sides and the tooth boots 17 on the second double wedge 15 meets relationship: The maximum radial thickness W1 of the tooth boots 17 of intermediate double wedge 13, the maximum radial thickness of the tooth boots 17 of the first double wedge 14 W2, the maximum radial thickness W3 of the tooth boots 17 of the second double wedge 15,1 facewidth of stator are Wt, are met: 0.45≤W1/W2≤ 1.85,0.45≤W1/W3≤1.75,0.25≤W1/Wt≤0.85, in Tables 1 and 2, the tooth boots 17 of intermediate double wedge 13 are most Big radial thickness dimension W1, the maximum radial thickness W2 of the tooth boots 17 of the first double wedge 14, the second double wedge 15 tooth boots 17 Relationship between maximum radial thickness W3 and unbalanced magnetic pull is optimized according to finite element numerical calculating, from numerous Prioritization scheme in, find optimal design size range.Wherein, along the rotation direction of rotor, the second double wedge 15, centre are convex Tooth 13 and the first double wedge 14 are set gradually.As shown in figure 1, the rotation direction of rotor is counterclockwise.

It can be but be not limited to 0.4,0.6,0.8,1.0,1.2 or 1.4.

The uneven electromagnet pull of motor can be effectively reduced using rotor structure provided by the utility model, and then is reduced Vibration noise of motor improves sense of hearing.

The optimum results that 1 numerical value of table calculates

The optimum results that 2 numerical value of table calculates

Rotor is rotatably arranged at the inside of double wedge 12.Rotor includes rotor core, and rotor core includes rotor punching, magnetic Iron slot, the quantity of magnet slot are at least one, and along the circumferentially-spaced distribution of rotor core, permanent magnet sets whole magnet slots It sets in magnet slot.Permanent magnet is in the form of sheets or arc-shaped, and multiple magnet slots is arranged in several permanent magnets correspondingly In.

The number of poles of rotor is 10 poles, can also be 8 poles, 12 extremely etc. certainly.

It is combined into the synchronous motor of 10 pole, 9 slot in number of magnetic poles and slot number group, the winding for constituting a phase is collectively arranged.Cause This, when electric current flows to stator winding, the rotating excitation field of generation generates non-uniform electromagnetic force relative to the shaft of rotor.Relative to Shaft generates very big radial exciting force radially.In 10 pole, 9 slot synchronous motor, when rotor rotates a circle, in sine The exciting force of wave variation is total to the period 10 times.The size of radial exciting force shows, as the load torque of synchronous motor increases And the trend increased.

Unbalanced magnetic pull significant effect of the utility model for 10 pole motors of improvement.

According to table 1, compared to initial scheme W1min=1mm, the scheme of W2min=1mm, W3min=1mm, final side The uneven electromagnet pull of case reduces 71%, significant effect, wherein and W2min is the smallest radial thickness of the first double wedge, W3min is the smallest radial thickness of the second double wedge.

The smallest radial thickness of the tooth boots 17 of intermediate double wedge 13 is W1min, 1.4≤W1/W1min≤3.2.

With the variation of the maximum radial thickness of the tooth boots 17 of intermediate double wedge 13, the tooth boots 17 of intermediate double wedge 13 are most Small radial thickness dimension also has to make as the variation of same trend, just can guarantee that magnetic flux passes through, and can make back-emf, air gap The aberration rate of magnetic flux density waveforms is in preferably range.

The size range of W1 is 2.4mm-4.7mm, most to stator tooth (double wedge 12) the tooth boots 17 of 100 motor of compressor Big thickness range is defined.

As shown in fig. 6,17 or so two parts of tooth boots of the intermediate double wedge 13 in a phase are asymmetrically shape.

The tooth boots 17 of asymmetrically shape can equally reach preferable back-emf and promote effect, and then reduce copper loss, be promoted Efficiency, left and right two parts refer to two parts that the tooth boots 17 of intermediate double wedge 13 are divided by the axis of intermediate double wedge 13.

As shown in fig. 7, the tooth boots 17 of two double wedges 12 (the first double wedge 14 and the second double wedge 15) positioned at two sides in a phase Left and right two parts are asymmetrically shape, and left and right two parts of the tooth boots 17 of the first double wedge 14 refer to the tooth boots 17 of the first double wedge 14 Left and right two parts of the two parts being divided by the axis of the first double wedge 14, the tooth boots 17 of the second double wedge 15 refer to the second double wedge Two parts that 15 tooth boots 17 are divided by the axis of the second double wedge 15.

The tooth boots 17 of asymmetrically shape can equally reach preferable back-emf and promote effect, and then reduce copper loss, be promoted Efficiency.

The direction of winding of adjacent windings 16 in one phase is on the contrary, this is the distinctive method for winding of this 9 slot electric machine structure.

The rotor number of poles of motor is 10 poles.It can be concluded that, for the motor of 10 pole rotors, adopted by finite element numerical calculating It can have smaller unbalanced magnetic pull with the utility model, low frequency noise can be significantly reduced.

The ratio of the internal diameter Di and outer diameter D o of 1 iron core of stator meet 0.51≤Di/Do≤0.57.

The ratio of Di/Do limits within this range, and best price/performance ratio can be obtained while meeting rotary inertia.

As shown in figure 5, rotor is tangential rotor, the iron core region that the adjacent permanent magnet surrounds out is magnetic pole.

As shown in Figure 3 and Figure 4, the sum of width of permanent magnet under every magnetic pole is bm, and the internal diameter of stator 1 is Di, rotor Number of pole-pairs is P, 0.75≤bm × 2P/ (π × Di)≤0.9.

When in a magnetic pole including multiple permanent magnets, bm is the sum of the width of multiple permanent magnets.To include two in a magnetic pole For a permanent magnet, the width of two permanent magnets is respectively bm1, bm2, and bm is the sum of the width of two permanent magnets, i.e. bm=bm1 + bm2, the sum of width of permanent magnet meet this range with number of pole-pairs, permanent magnet utilization rate highest may be implemented, cost performance is most It is excellent.

Each magnetic pole includes two permanent magnets, and each magnetic pole is V-shaped, the model of the opening angle of the V-arrangement Enclose is 90 °~130 °.The angle of V-arrangement permanent magnet meets the range, back-emf fundamental wave maximum may be implemented, winding copper loss is low, effect Rate is high.

As shown in Fig. 2, magnetic pole d axis two sides circular arc composition is using rotation center as the whole section of circular arc in the center of circle, the circular arc is corresponding Central angle is α 1, and pole span angle is α 2, wherein 1/ α 2 >=0.5 of α.

1/ α 2 >=0.5 of α meets the range, can provide enough main fluxs, while can satisfy manufacturing requirement.

The torque per unit volume TPV satisfaction 5.18 of the nominal torque T of synchronous motor 10, the internal diameter Di of stator 1 and rotor × 10^-7≤T×Di^-3×TPV^-1≤1.17×10^-6, wherein the unit of nominal torque T is Nm, and the unit of internal diameter Di is mm, single The unit of position volumetric torque TPV is kNmm^-3, the value range of torque per unit volume TPV is 5kNmm^-3≤TPV≤ 45kN·m·m^-3。

In the technical scheme, the nominal torque T, the internal diameter Di of stator 1 and the unit bodies of rotor of magneto are defined The value range of the union variable of product torque TPV, also defines the value range of torque per unit volume TPV, so that the Permanent Magnet and Electric Machine can satisfy the power demand in 100 field of compressor, accordingly for using the rotor magneto and compressor 100, It can effectively reduce rotor leakage, increase permanent magnet utilization rate, promote electric efficiency.

As shown in figure 8, the embodiment of the second aspect of the utility model provides a kind of compressor 100, including as above State the synchronous motor 10 of any embodiment.Therefore with whole beneficial effects of the synchronous motor 10, details are not described herein.

In conclusion stator 1 provided by the embodiment of the utility model, has back-emf height, winding loss low, carries and synchronize Electric efficiency can be improved on motor, be suitable for permanent magnet synchronous motor 10, by optimizing 1 structure of motor stator, guaranteeing manufacturing Under the premise of without change, it is effectively reduced motor unbalanced electromagnetic force, and then inhibit the vibrating noise of motor, thus product are provided The preferable magneto of matter.

In the description of the present invention, unless otherwise clearly defined and limited, term " multiple " refers to two or two More than a；Unless otherwise prescribed or illustrate, term " connection ", " fixation " etc. shall be understood in a broad sense, for example, " connection " can be It is fixedly connected, may be a detachable connection, or be integrally connected, or electrical connection；It can be directly connected, it can also be in Between medium be indirectly connected.For the ordinary skill in the art, above-mentioned term can be understood at this as the case may be Concrete meaning in utility model.

In the description of this specification, it is to be understood that the instruction such as term " on ", "lower", "front", "rear", "left", "right" Orientation or positional relationship be to be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the utility model and letter Change description, rather than the device or unit of indication or suggestion meaning must have specific direction, with specific orientation construct and Operation, it is thus impossible to be construed as a limitation of the present invention.

In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc. Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least the one of the utility model In a embodiment or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment Or example.Moreover, the particular features, structures, materials, or characteristics of description can be in any one or more embodiment or examples In can be combined in any suitable manner.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (13)

1. a kind of synchronous motor characterized by comprising stator, stator winding, rotor；

The rotor includes rotor core, and the rotor core includes rotor punching and multiple magnet slots, whole magnet Along the circumferentially-spaced distribution of the rotor core, several permanent magnets are inserted correspondingly into multiple magnet slots slot, rotor Number of magnetic poles and slot number absolute value of the difference be 1；

The stator includes: yoke portion and the double wedge of annular, and the quantity of the double wedge is 9, and 9 double wedges are in the yoke portion Interior lateral edge described in yoke portion be provided at circumferentially spaced, the inner end of the double wedge is equipped with tooth boots；

The stator winding is wound around on the double wedge, and the double wedge is divided into 3 phases, and each coil is across only described in one Three double wedges of double wedge, one phase of composition include being located in the middle intermediate double wedge, being located at the intermediate double wedge two sides First double wedge and the second double wedge；

Wherein, farthest point the distance between of farthest point of the tooth boots boots point far from diameter of stator bore to tooth boots root far from diameter of stator bore For Ws, the length of tooth boots boots point is TGD, and the maximum radial thickness of the tooth boots of the intermediate double wedge is W1, then:

2. synchronous motor according to claim 1, which is characterized in that

Second double wedge described in direction of rotation by the rotor, the intermediate double wedge and first double wedge are set gradually；It is described The maximum radial thickness of the tooth boots of first double wedge is W2, and the maximum radial thickness of the tooth boots of second double wedge is W3, then:

0.45≤W1/W2≤1.85,0.45≤W1/W3≤1.75.

3. synchronous motor according to claim 1, which is characterized in that

The smallest radial of the tooth boots of the intermediate double wedge is with a thickness of W1min, 1.4≤W1/W1min≤3.2.

4. synchronous motor according to claim 1, which is characterized in that

W1 meets 2.4mm≤W1≤4.7mm.

5. synchronous motor according to claim 1, which is characterized in that

The width of the double wedge is Wt, 0.25≤W1/Wt≤0.85.

6. synchronous motor according to any one of claim 1 to 5, which is characterized in that

The tooth boots of the intermediate double wedge are asymmetric along the axis of the intermediate double wedge；And/or

The tooth boots of first double wedge are asymmetric along the axis of first double wedge；And/or

The tooth boots of second double wedge are asymmetric along the axis of second double wedge.

7. synchronous motor according to any one of claim 1 to 5, which is characterized in that

The number of poles of the synchronous motor is equal to 10.

8. synchronous motor according to any one of claim 1 to 5, which is characterized in that

The direction of winding of the coil in one phase on the adjacent double wedge is opposite.

9. synchronous motor according to any one of claim 1 to 5, which is characterized in that

The sum of width of the permanent magnet under every magnetic pole is bm, and the internal diameter of the stator is Di, and the number of pole-pairs of the rotor is P, then 0.75≤bm × 2P/ (π × Di)≤0.9.

10. synchronous motor according to any one of claim 1 to 5, which is characterized in that

The rotor is tangential rotor, and the iron core region that the adjacent permanent magnet surrounds out is magnetic pole.

11. synchronous motor according to any one of claim 1 to 5, which is characterized in that

The torque per unit volume TPV of the nominal torque T of the synchronous motor, the internal diameter Di of the stator and the rotor meet 5.18×10^-7≤T×Di^-3×TPV^-1≤1.17×10^-6, wherein the unit of the nominal torque T is Nm, the stator The unit of internal diameter Di is mm, and the unit of the torque per unit volume TPV is kNmm^-3, the torque per unit volume TPV's takes Value range is 5kNmm^-3≤TPV≤45kN·m·m^-3。

12. synchronous motor according to any one of claim 1 to 5, which is characterized in that

Magnetic pole d axis two sides circular arc is formed using rotation center as the whole section of circular arc in the center of circle, and the corresponding central angle of the circular arc is α 1, pole span Angle is α 2, wherein 1/ α 2 >=0.5 of α.

13. a kind of compressor, which is characterized in that including the synchronous motor as described in any one of claims 1 to 12.