CN107852056A - The stator with insulation bar winding for motor - Google Patents

Abstract

The present invention relates to a kind of stator (1) for being used for motor (34), it has laminated core (2), the laminated core has the groove (4) extended on the axial direction (3) of the stator (1), and the stator has the conductive bar (21) for the electric winding for forming the stator (1), in each case, at least one conductive bar in the conductive bar is scheduled in a groove in the groove (4), wherein each bar (21) is electrically insulated by corresponding electrical insulation parts (22) with the laminated core.The stator (1) can efficiently manufacture.The present invention provides：Corresponding electrical insulation parts (22) are configured to be formed by thermoplastic and surrounded the hose element (23) of the bar (21).

Description

The stator with insulation bar winding for motor

Technical field

Motor, motor vehicles the present invention relates to the stator for motor, with the stator according to the present invention, and be used for The method for manufacturing stator.Stator has laminated core with groove, arranges at least one conductive bar in each recess (bar), wherein whole bars forms the electric winding of stator.Each bar is insulated by means of electrical insulation parts and laminated core.

Background technology

In the case of certain types of stator, provide in the prior art so that each conductor wire bar coating has electricity absolutely Edge surface application agent.Then, it is fixed in groove bar being arranged in laminated core and using insulating paper.Finally, With casting compound (especially impregnating resin) come varnish(ed) paper.As a result, by bar fix in a groove and with lamination iron Core insulation.

This manufacturing process being known from the prior art that takes, because bar is needed into height together with insulating paper arrangement Precision.In addition, the subsequent cure of the dipping of insulating paper and compound of casting spends some hours.

The content of the invention

The present invention is based on following target：The motor that can efficiently manufacture is obtained, in particular for the motor of motor vehicles.

The target is realized by means of the theme of independent claims.The advantageous development of the present invention is by dependent claims Feature provide.

The present invention obtains the stator for motor.In a way known, stator has laminated core with groove, institute Groove is stated on the axial direction of stator to extend.Axial direction is with will be arranged the expection rotation axis one of rotor in the stator Play orientation.Stator also has the conductive bar for the electric winding for forming stator, in the case of respective, a groove in a groove In at least one conductive bar in conductive bar is scheduled.In other words, stator has bar winding.In the case of respective, Two bars are preferably arranged in each groove, and bar is connected to each other to form Double Layer Winding.Each bar passes through corresponding Electrical insulation parts are electrically insulated with laminated core.

However, compared with prior art, electrical insulation parts are not then by layer of surface coating agent and with casting compound What the insulating paper of dipping was formed.On the contrary, in order to efficiently manufacture stator, there is provided be each bar corresponding electrical insulation parts It is configured to hose element that is being formed by thermoplastic and surrounding corresponding bar.In other words, each bar along it Length is surrounded or encased by plastics.In other words, each bar has the sheath formed by plastics.

The present invention provides advantages below：Each bar can be separately made together with its electrical insulation parts or obtained. Each bar can be then inserted into groove together with its electrical insulation parts with final product form.Then, it is not necessary to further Processing step bar and the laminated core is insulated.

Present invention additionally comprises optional development, the feature of these development provides the advantages of extra.

According to a development, the plastics of corresponding hose element are arranged in around corresponding bar by means of extrusion molding.In other words, Plastics under soft or fluid state are arranged or cast in around bar by means of extrusion.This provides advantages below：Can be by Machine one after the other provides bar their corresponding electrical insulation parts with lasting or ongoing extrusion.This to make Make even more effective.

According to a development, wherein arranging to have the recess widths of the corresponding recesses of hose element than hose element outer in itself Footpath big at most 0.2mm, especially 0mm.In other words, in the circumferential direction of stator, bar and its flexible pipe in each recess There is caused clearance or have free space in element, the free space at most 0.2mm, especially up to 0mm together.This is provided Advantages below：Each bar can be with seldom cost fixation or attachment in a groove.Such as fold or warpage is from laminated core It is sufficient that end of the bar of stretching causes bar to be taken a seat in a groove securely together with its hose element.

A development herein provides bar plasticity and/or elastic warpage, and therefore have mechanical stress in a groove, The mechanical stress causes hose element to be pressed against the groove walls of groove.This provides advantages below：Ensure or ensure that laminated core Heat transfer between bar.This warpage for example can be by means of described to the bar end stretched out from laminated core Fold or warpage is realized.

According to a development, the wall thickness of the hose element of each bar is in the range of 0.1mm to 0.5mm.For example, wall Thickness can be 0.3mm.In other words, in each direction, there are plastic layer, the plastic layer tool between bar and laminated core There are the thickness or wall thickness in the range of 0.1mm to 0.5mm.This provides advantages below：Each bar is only by means of hose element Just reliably it is electrically insulated with laminated core.In addition, additionally provide the reliable heat transfer using specific dimensions.

According to a development, groove is not cast compound.In other words, stator is utilized, it is possible to save and pour out casting again Compound, for example, the impregnating resin.Therefore, this time-consuming manufacturing step is avoided.

According to a development, plastics have polyamide and/or PPSU (PPSU) and/or polyphthalamide (PPA) or by it formed.These plastics have been demonstrated especially advantageous when using the stator manufactured in the manner described.

As for bar in itself, a development provides each bar and formed by copper.This causes to be adapted to the electricity for obtaining winding Conductance.In addition, the deformability of bar is ensure that in addition, will pass through each bar of warpage to cause the plastics pressure of hose element By groove walls.

Present invention additionally comprises the motor of the embodiment with the stator according to the present invention.The rotor of motor is rotatably mounted In the stator.Motor can be made up of particularly small number of job step, can be by means of by line because by described mode Rod and their insulation component are cooperatively inserted into laminated core simultaneously and then broken curve stick end manufactures stator.

Motor is particularly preferably provided to be configured to the starter generator of motor vehicles or be configured to motor vehicle BAS electro-motor.In the two applications, it is obvious that what is manufactured in the way of the present invention determines Son has the abundant heat transfer between bar and laminated core, is as a result the absence of casting compound and does not form shortcoming especially.

Finally, present invention additionally comprises motor vehicles, motor is obtained or pacified by described mode in the motor vehicles Row's.

In order to manufacture the embodiment of the stator according to the present invention, the present invention is also obtained for manufacturing the stator according to the present invention Embodiment method.In the method according to the invention, obtain having reeded laminated core, the groove is with known side Formula extends on the axial direction of stator.For each groove, at least one conductive bar is obtained.It is as it was earlier mentioned, each recessed Groove preferably provides two bars.In order to be then able to arrange bar in a groove and in the process with a small amount of job step The electric insulation between each bar and laminated core is obtained, according to each the present invention is to provide surrounding to obtain with hose element Bar, the hose element are formed by thermoplastic and formed the electrical insulation parts having been described above.Each bar with it is corresponding Ground surrounds its hose element and is inserted into together in the groove correspondingly provided.In other words, it is inserted into accordingly by each bar After in groove, while it also ensure that electric insulation of the bar relative to laminated core.Therefore, it is not required to after each bar is inserted Extra work step is wanted to ensure to be electrically insulated.

In order to obtain the bar with corresponding hose element, a development is provided for obtaining the mesh of bar , obtain being arranged the wire for there are plastics around it by means of extrusion molding.Wire and plastics are divided into bar and hose element.Change Yan Zhi, it is possible to obtain the volume for example with the wire encased by plastics.Can be in an automated way by being incited somebody to action from volume Wire, which is untied, to be wound and is cut into wire or is divided into single bar to obtain each bar.In this context, Ke Yiyan Wire and continuously arrange plastics.In order to then obtain hose element, it may be provided that from the end of bar and remove insulation, That is remove plastics.

Wire can be such as round wire or tape conductor.

Due to bar is obtained together with the hose element of bar before being inserted into corresponding recesses, therefore, according to One embodiment, in each case, each bar can be inserted into together with hose element advantageously corresponding with it groove it In one.Hose element especially adheres to bar herein, and result is unnecessary or can save to each hose element in groove It is adjusted.

One development provides to be shaped by warpage to make to be inserted into each bar in one of groove, and is therefore made The corresponding hose element for obtaining bar is pressed against the groove walls of corresponding recesses.This produces contact point between hose element and groove.This Specifically ensure that the heat transfer path of no air between laminated core and bar be present.

Brief description of the drawings

The exemplary embodiment of the present invention is described below, wherein：

Fig. 1 shows that the signal of the perspective view of the embodiment of the stator according to the present invention is shown,

Fig. 2 shows the signal displaying of Fig. 1 stator, wherein single electric coil is show only,

Fig. 3 shows the signal displaying in the section of stator,

Fig. 4 shows the signal displaying of the perspective view of the single conductor element of stator,

Fig. 5 shows the signal displaying of the side view of conductor element,

Fig. 6 shows the signal displaying in the section of conductor element, and

Fig. 7 shows that the signal of the embodiment of the motor vehicles according to the present invention is shown.

Embodiment

Exemplary embodiment as explained below is the preferred embodiments of the present invention.In the exemplary embodiment, embodiment Described part each represent the independent feature of the present invention, the feature will be considered and each also each other independently of one another The independently development present invention, and the portion of the present invention therefore can also be considered individually or in combination than that shown Part.Further, it is described that other features of the invention can also be added to described embodiment.

In the accompanying drawings, function identical element is correspondingly provided with identical reference symbol.

Fig. 1 shows the stator 1 for motor.Stator 1 can be provided for the starter generator of such as motor vehicles. Stator 1 has laminated core 2, and the laminated core can be in a way known per se by soft magnetic metal lamella (coercive force field strength Degree be less than 1000A/m) formed, the soft magnetic metal lamella is electrically insulated from each other and axially 3 stacked or layered.

In the groove 4 of laminated core 3, in each case, two conductor elements 6,7 pass through axial notch opening 5 insertions.For clarity, in each case, only some specific elements are already provided with reference symbol.Each groove 4 conductor element 6,7 is arranged to align in radial direction 8, and one behind another.In each case, radial direction side Pointed to vertically outward to 8 from the axis 9 so as to limiting axial direction 3.Axis 9 corresponds to the rotor that can be arranged in the stator Expection rotation axis.

Different radial distances between conductor element 6,7 cause two rings or layer 10,11, wherein radially outer conductor element 6 forming layers 10 and the forming layer 11 of inner radial conductor element 7.Layer 10,11 is the part of the Double Layer Winding 12 of stator 1.Institute In the example shown, Double Layer Winding 12 includes six electric coils, and each electric coil is the respective subset by connecting conductor element 6,7 It is and caused.In each case, a conductor element of a conductor element of outer layer 10 and internal layer 11 is formed in coil One coil be connected (phase connection) or coil connection 13.The coil connection 13 of coil is each arranged in connection In region 14.

For purposes of illustration, Fig. 2 shows single electric coil 15.The diagram that diagram in Fig. 2 corresponds in Fig. 1, wherein Eliminate all that conductor element 6,7 associated with other electric coils.Coil 15 shown in Fig. 2 have altogether three circle or Three circles 16, they connect 17 by linkage in join domain 14 and are electrically connected to each other.

In order to form the circle 16 of coil 15, circumferentially direction U1 is tilted or warpage for the conductor element 6 of outer layer 11, and The conductor element 7 of the internal layer 11 warpage on relative circumferential direction U2.Therefore, the conductor element 6 of two layers 10,11,7 quilts Interlocking, result are tilting zones with the inclination angle relative to end face 18.End conductor also has leads parallel to what axis 9 oriented Body end portion.For this purpose, end conductor has skew.

The inclination angle of all tilting zones of end conductor is all identical.Therefore, these end conductors especially closely one On top of the other.End conductor is the part on the winding head 20 on the end face 18 of laminated core 2.

Fig. 3 shows how electric with the soft magnetic metal lamella of laminated core 2 electrical conductive elements 6,7 in the inside of laminated core are Insulation.For clarity, in each case, several reference symbols are provided just for the specified element in Fig. 3.Each conductor Element 6,7 is formed by conductive bar 21 and electrical insulation parts 22.

Fig. 4 shows individually there is conductive bar 21 and the single electrical conductive elements 6,7 of electrical insulation parts 22 again.Each In the case of, bar 21 can be tape conductor or flat conductor.The material of bar 21 can be such as copper.Electrical insulation parts 22 It is configured to sheath or hose element 23.

Fig. 3 shows how each bar 21 passes through the material and laminated core 2 of hose element 23 by means of insulation component 22 Electric insulation.Hose element 23 is formed by thermoplastic, and the thermoplastic can have such as polyamide and/or PPSU And/or PPA.

Fig. 3 also showed that in the region on each winding head 20, as the interlocking shown in Fig. 1 or the result of warpage, each How bar 21 is pressed against the groove walls 24 of corresponding recesses 4, and wherein bar 21 is mechanically supported or warpage.

The plastics of hose element 23 can be applied in bar 21 by means of extrusion molding.

For this purpose, it is directed across extrusion by each bar 21 or by being separated to produce the wire of bar 21 Arrange (not shown).Annular gap is located therein, and plastics are gone out with deformable or liquid or fluid state from the annular gap It is existing.As a result, the flexible pipe rested on bar 21 or wire is generated.

Fig. 5 shows during bar 21 is produced from wire how this wire to be divided into bar length 25 bar 21.It can provide herein：Eliminated absolutely by removing the plastic insulation of hose element 23 from bar 21 to be formed The end 26 of edge, result are that each hose element 23 has the insulated lengths 27 for being less than bar length 25.Bar length can example Such as in the range of such as 8cm to 15cm.

How Fig. 6 displayings by means of hose element 23 surround bar 21 with plastics, and wherein have can be for hose element 23 Thickness degree or wall thickness 28 in the range of 0.1mm to 0.5mm.The edge 29 of bar 26 preferably have bent portion or Radius of curvature 30 in the range of 0.5mm to 1.5mm.This produces advantages below：During vibration movement edge 29 will not cut or Tear hose element 23.

The external diameter 32 (that is, external diameter 32 of the hose element 23 in circumferential direction U1, U2) of conductor element 6,7 is than this The small at most 0.2mm of recess width 33 on individual direction.Hose element 23 preferably contacts with two groove walls relative to each other.

How Fig. 7 displayings by means of stator 1 can obtain motor 34.In the case of motor 34, rotor 35 is rotatable Ground is arranged in stator 1.Rotor 35 is connected in a rotationally fixed manner to axle 36.Motor 34 may be mounted at such as motor vehicles In 37.Motor vehicles 37 can be such as automobile, specifically, passenger car or truck.Axle 36 can be connected to vehicle part 38, The vehicle part can be such as pump of explosive motor or the hydraulic braking circuit for BAS.Can be with Per se known manner by means of inverter by alternately making the electric coil of stator 1 be powered come motor 34.This is in stator Inside produce rotating excitation field, this field drives rotor 35.Rotor 35 then rotates around axis 9.

Generally speaking, example shows that the electricity for the copper cash rod that how can obtain stator by extruding the plastic coating of application is exhausted Edge.The thickness of plastic layer can optionally be set by certain way so that the pin of extrusion or the bar of extrusion can be inserted directly Enter into the groove 4 in laminated core 2 and then interlocked or warpage or distortion.The advantages of better than prior art, exists In the high cost process of groove insulation can be eliminated.Specifically, it is not necessary to put insulating paper in a groove and then with leaching Stain resin carrys out varnish(ed) paper.Another advantage is that any one of insulating surface coating on insulating paper or bar is not It can be damaged.

The hose element being made up of thermoplastic is flexible, and the shape with bar during warpage or distortion is fitted Match somebody with somebody.The hose element being made up of plastics also has enough mechanical load-bearing capabilities, and nevertheless, can still select sufficiently thin Plastic coating.

Therefore, the overall cost reduction saved and be associated be present in manufacturing step or processing step.Furthermore, it is possible to Relatively short time cycle manufacture stator 1.With and with electric insulation face coat and subsequently, by means of insulating paper cast multiple Compound compares the face coat for the bar 21 that bar is fixed in groove 4, and the plastic coating by extruding application, which has, to be changed The mechanical load-bearing capability entered.

Therefore, example totally show the present invention how to permit tape conductor thermoplastic sheath be used for manufacture motor around Group.

Claims (15)

1. one kind is used for the stator (1) of motor (34), it has laminated core (2), and the laminated core has in the stator (1) groove (4) extended on axial direction (3), and the stator has the conduction for the electric winding for forming the stator (1) Bar (21), in each case, at least one in the conductive bar is scheduled in a groove in the groove (4) Individual conductive bar, wherein each bar (21) is electrically insulated by corresponding electrical insulation parts (22) with the laminated core, institute State stator to be characterised by, corresponding electrical insulation parts (22) are configured to be formed by thermoplastic and surrounded described The hose element (23) of bar (21).

2. stator (1) according to claim 1, wherein the plastics of corresponding hose element (23) are by means of extrusion molding arrangement Around corresponding bar (21).

3. stator (1) according to any one of the preceding claims, wherein arranging have the described of the hose element (23) The corresponding recesses width (33) of groove (4) is bigger at most 0.2mm than the external diameter (32) of the hose element (23), especially up to 0mm。

4. stator (1) according to any one of the preceding claims, wherein the bar (21) is moulded in the groove (4) Property and/or elastic warpage, and therefore there is mechanical stress, described in the mechanical stress make it that the hose element (23) is pressed against The groove walls (24) of groove (4).

5. stator (1) according to any one of the preceding claims, wherein the wall thickness (28) of the hose element (23) In the range of 0.1mm to 0.5mm.

6. stator (1) according to any one of the preceding claims, wherein the groove (4) is without casting compound.

7. stator (1) according to any one of the preceding claims, wherein the plastics have polyamide and/or gather sub- benzene Base sulfone and/or polyphthalamide are formed by it.

8. stator (1) according to any one of the preceding claims, wherein each bar (21) is formed by copper.

9. a kind of motor (34), it has stator according to any one of the preceding claims (1), and wherein rotor (35) can It is rotationally mounted in the stator (1).

10. motor (34) according to claim 9, wherein the motor (34) be configured to starter generator or by It is disposed for the electro-motor of the BAS of motor vehicles (37).

11. a kind of motor vehicles (37), it has the motor (34) according to claim 9 or 10.

12. one kind is used for the method for manufacturing stator according to any one of claim 1 to 8 (1), wherein in methods described In, the laminated core (2) with groove (4) is obtained, the groove extends on the axial direction (3) of the stator (1), and At least one conductive bar (21) is obtained for each groove (4), methods described is characterised by, obtained each bar (21) Surrounded by the hose element (23) formed by thermoplastic, and each bar (21) is with correspondingly surrounding its flexible pipe Element (23) is inserted into the groove (4) correspondingly provided together.

13. according to the method for claim 12, wherein in order to obtain the bar (21), obtain by means of extrusion molding at it Surrounding arranges the wire of plastics, and the wire is divided into the bar (21), and the plastics are divided into the flexible pipe Element (23).

14. the method according to claim 12 or 13, wherein in each case, each bar (21) is corresponding to its Hose element (23) be inserted into together in a groove in the groove (4).

15. the method according to any one of claim 12 to 14, wherein making to be inserted into the groove (4) by warpage In a groove in each bar (21) shaping, and the hence in so that corresponding hose element of the bar (21) (23) groove walls (24) of corresponding recesses (4) are pressed against.