CN109861411A - A kind of motor stator core - Google Patents
A kind of motor stator core Download PDFInfo
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- CN109861411A CN109861411A CN201811636735.8A CN201811636735A CN109861411A CN 109861411 A CN109861411 A CN 109861411A CN 201811636735 A CN201811636735 A CN 201811636735A CN 109861411 A CN109861411 A CN 109861411A
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- silicon steel
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Abstract
The present invention relates to a kind of motor stator cores, stator core is formed by annular orientation silicon steel iron core is nested with the annular non-orientation silicon steel iron core being located at outside annular orientation silicon steel iron core, annular orientation silicon steel iron core is formed by stacking by two kinds of grain-oriented Si steel sheets, annular orientation silicon steel iron core is equipped with orientation slots, orientation slots and annular non-orientation silicon steel iron core fit to form enclosed slot, notch magnetic bridge is equipped between orientation slots and the inner sidewall of annular orientation silicon steel iron core, magnetic bridge through-hole is equipped at notch magnetic bridge, so that the magnetic circuit of notch magnetic bridge is saturated.In use, magnetic bridge through-hole of the invention is saturated the magnetic circuit of notch magnetic bridge, to improve air gap flux density, reduce magnetic leakage factor, improves power of motor density, dovetail groove can effectively reduce notch leakage field and air gap flux pulsation, and then improve motor output torque.
Description
Technical field
The present invention relates to the technical field of motor, specifically a kind of motor stator core more particularly to a kind of orientation
The stator core mixed with No yield point.
Background technique
Motor in electric automobile stator uses non-oriented silicon steel sheet at present, and motor average efficiency range is 50-80%.It is especially right
In high-speed motor, as working frequency rises, the core loss in iron core is increased considerably, and does not only result in electric efficiency reduction,
Also motor long-time steady operation is influenced.
With vehicle course continuation mileage is continuously improved, new-energy automobile driving motor needs high power density, high torque, height
Efficiency, wide high efficient district, low-loss.Non-oriented silicon steel sheet makees iron core material for generator, is unable to satisfy these demands；Grain-oriented Si steel sheet its
The characteristics of anisotropy, becomes possibility, but orientation technology is mainly used in large-sized water turbine generator and transformer at present,
Applied to new-energy automobile obtain motor field there is presently no.
Therefore, it is badly in need of wanting a kind of stator core for being orientated and being mixed with non-orientation silicon steel in the market, it is new to reach
The characteristics such as high power density, low-loss required for energy automobile.
Summary of the invention
The purpose of the present invention is to provide a kind of improved motor stator cores, it can overcome power in the prior art to damage
The deficiency that consumption is big, magnetic conductivity is not high.
To achieve the goals above, the technical scheme is that a kind of motor stator core, it is characterised in that: stator
Iron core is formed by annular orientation silicon steel iron core is nested with the annular non-orientation silicon steel iron core being located at outside annular orientation silicon steel iron core,
Annular orientation silicon steel iron core is as stator teeth, and annular non-orientation silicon steel iron core is as stator yoke, annular orientation silicon steel iron core
It is formed by stacking by two kinds of grain-oriented Si steel sheets, annular orientation silicon steel iron core is equipped with orientation slots, orientation slots and annular non-orientation silicon steel
Iron core fits to form enclosed slot, is equipped with notch magnetic bridge, notch magnetic between orientation slots and the inner sidewall of annular orientation silicon steel iron core
Magnetic bridge through-hole is equipped at bridge, so that the magnetic circuit of notch magnetic bridge is saturated.
Preferably, annular orientation silicon steel iron core is staggeredly formed by stacking by positive grain-oriented Si steel sheet and inverted orientation silicon steel sheet,
The orientation trench bottom of annular orientation silicon steel iron core is orientation slots bottom yoke portion, and orientation slots bottom yoke portion is equipped with several dovetail grooves, each
A dovetail groove is connected with an orientation slots, and dovetail groove forms magnetic slot at the notch of orientation slots and carves, annular oriented silicon steel
Clearance fit is formed between the orientation slots bottom yoke portion of core and the inner wall of annular non-orientation silicon steel iron core.
Further, the both ends of orientation slots are respectively large port and portlet, and portlet is connected with notch magnetic bridge, and portlet is circular arc
Shape is formed by a plurality of flanging is coherent, and the shape of portlet is corresponding with the side edge shape of magnetic bridge through-hole.
Further, there are three magnetic bridge through-hole is total to, centre is rectangular through holes, and two sides are tetragonal through hole, each
The angle of flanging is matched with the shape of magnetic bridge through-hole.
Compared with the existing technology, technical solution of the present invention further includes many details in addition to the improvement of overall technical architecture
The improvement of aspect, specifically, having the advantages that
1, improvement project of the present invention, stator core is by annular orientation silicon steel iron core and is located at outside annular orientation silicon steel iron core
The annular non-orientation silicon steel iron core nesting in portion forms, and by being equipped with orientation slots on annular orientation silicon steel iron core, and magnetic bridge is arranged
Through-hole to improve air gap flux density, reduces magnetic leakage factor, improves power of motor density so that the magnetic circuit of notch magnetic bridge is saturated；
2, in technical solution of the present invention, annular orientation silicon steel iron core is handed over by positive grain-oriented Si steel sheet and inverted orientation silicon steel sheet
Mistake is formed by stacking, and improves the axial plane degree of annular orientation silicon steel iron core, increases orientation iron core homogeneity, globality and securely
Property；
3, orientation slots bottom yoke portion of the present invention is equipped with several dovetail grooves, and dovetail groove forms magnetic slot at the notch of orientation slots and carves,
Clearance fit is formed between the orientation slots bottom yoke portion of annular orientation silicon steel iron core and the inner wall of annular non-orientation silicon steel iron core, it can be with
Notch leakage field and air gap flux pulsation are effectively reduced, and then improves motor output torque, efficiency, reduces loss；
4, the configuration of the present invention is simple, easy to process, cost is relatively low, is conducive to promotion and application.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structural schematic diagram of the cross section of one embodiment of the invention.
Fig. 3 is annular orientation silicon steel core structure schematic diagram of the invention.
Fig. 4 is annular non-orientation silicon steel core structure schematic diagram of the invention.
Fig. 5 is partial enlargement diagram of the invention.
Fig. 6 is the partial enlargement diagram of Fig. 5.
Fig. 7 is the overlaying structure schematic diagram of positive orientation silicon steel monolithic and inverted orientation silicon steel monolithic of the invention.
Fig. 8 is the monopole airgap density distribution curve comparison diagram of two kinds of stator cores in the embodiment of the present invention.
Fig. 9 is annular tool structure schematic diagram of the invention.
Appended drawing reference:
1 annular non-orientation silicon steel iron core, 2 annular orientation silicon steel iron cores, 3 magnetic bridge through-holes, 4 orientation slots, 5 annular toolings；
11 dovetail grooves；
21 positive orientation silicon steel monolithics, 22 inverted orientation silicon steel monolithics；
211 stator teeths, 212 orientation slots bottom yoke portions, 213 notch magnetic bridges；
51 pedestals, 52 positioning pins.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The present invention provides a kind of motor stator cores, and referring specifically to Fig. 1, difference with the prior art is: stator
Iron core it is nested with the annular non-orientation silicon steel iron core 1 being located at outside annular orientation silicon steel iron core by annular orientation silicon steel iron core 2 and
At annular orientation silicon steel iron core is as stator teeth, and annular non-orientation silicon steel iron core is as stator yoke, annular oriented silicon steel
Core is formed by stacking by two kinds of grain-oriented Si steel sheets, and annular orientation silicon steel iron core is equipped with orientation slots 4, orientation slots and annular No yield point silicon
Steel core fits to form enclosed slot, is equipped with notch magnetic bridge 213, slot between orientation slots and the inner sidewall of annular orientation silicon steel iron core
It is equipped with magnetic bridge through-hole 3 at mouth magnetic bridge, so that the magnetic circuit of notch magnetic bridge is saturated, the teeth portion magnetic line of force is hindered to enter notch oriented steel band,
Notch yoke portion width of steel band after removing through-hole there is enough intensity to guarantee；Additionally due to orientation silicon steel tangential direction magnetic
Conductance is lower, further results in through hole and is locally saturated, reach reduction leakage field, improves magnetic energy product in main magnetic circuit.
It specifically, is that oriented steel band is only the 1/3 of transverse direction in the iron loss of rolling direction, magnetic conductance the characteristics of orientation silicon steel
The ratio between rate is 6:1, and iron loss is about the 1/2 of hot-rolled strip, and magnetic conductivity is 2.5 times of hot-rolled strip.Therefore, oriented steel is made into motor iron
Core can improve motor output torque and efficiency to a certain extent, but orientation silicon steel is the problem is that tangential direction magnetic conductivity
Lower than traditional No yield point, iron loss is larger, and iron loss is higher, therefore the present invention just considers two different silicon steel materials carrying out group
It closes, specific motor stator core is made, this combination will not only consider technique, accomplish to improve magnetic conductivity in structure, reduce magnetic
Leakage and magnetic loss.
In one embodiment, annular orientation silicon steel iron core is handed over by positive grain-oriented Si steel sheet 21 and inverted orientation silicon steel sheet 22
Mistake superposition bonds, and forms cyclic structure, can also take the side of two panels forward direction grain-oriented Si steel sheet, a piece of inverted orientation silicon steel sheet
Formula is overlapped, so that the quantity of positive grain-oriented Si steel sheet is oppositely oriented 2 times of silicon steel sheet quantity.Orientation silicon steel is along rolling side
To magnetic conductivity highest, within the scope of rolling direction ± 20 °, performance is much better than the magnetic characteristic of non-orientation silicon steel, is based on this special efficacy
Orientation silicon steel monodentate constitutes a unit, improves the stock utilization of grain-oriented Si steel sheet, and then play the optimal spy of orientation silicon steel
Property.
The orientation trench bottom of annular orientation silicon steel iron core is orientation slots bottom yoke portion, and orientation slots bottom yoke portion is equipped with several dovetails
Slot 11, each dovetail groove are connected with an orientation slots, and dovetail groove forms magnetic slot at the notch of orientation slots 4 and carves, annular
Clearance fit is formed between the orientation slots bottom yoke portion of orientation silicon steel iron core and the inner wall of annular non-orientation silicon steel iron core.It is specific next
It says, the axis line position of orientation slots is arranged in dovetail groove, placed magnetic slot at the notch of orientation slots since dovetail groove is equal to
It carves, notch leakage field and air gap flux pulsation can be effectively reduced, and then improve motor output torque, efficiency, reduce loss.Tool
For body, the both ends of orientation slots are respectively large port and portlet, and portlet is connected with notch magnetic bridge, and portlet is arc-shaped,
It is corresponding with the side edge shape of magnetic bridge through-hole, to increase notch magnetic bridge magnetic resistance.Here magnetic bridge through-hole uses square hole, circle
Hole or quadrilateral hole.
Here dovetail groove is to connect annular non-orientation silicon steel iron core 1 and annular orientation silicon steel iron core 2, is facilitated under stator
Line, oat tail groove structure be it is trapezoidal, carve fixation convenient for needing to place dovetail groove during offline, prevent coiling from loosening.
In another embodiment, to realize that driving motor obtains higher convex grey subset in design driven motor, turning
Muon polarization side is used up the higher orientation silicon steel lamination of magnetic conductivity instead of non-orientation silicon steel lamination, while stator pole shoes also use
Orientation silicon steel lamination, effectively reduces iron loss, improves the convex grey subset of motor.
Motor stator teeth portion is overrided to form by grain-oriented Si steel sheet annular, is bonded between layers with epoxy glue, guarantees ring
Shape iron core is secured；Motor stator yoke portion is overrided to form by non-oriented silicon steel sheet, there are dovetail groove on the inside of ring steel belt, dovetail groove with
It is orientated annular core and carries out small―gap suture cooperation；Stator magnetic loop is that annular selection motion state is adopted in stator yoke at scalar property
Be conducive to the characteristics of playing non-oriented electrical steel isotropism with non-orientation silicon steel.
The both ends of orientation slots are respectively large port and portlet, and portlet is connected with notch magnetic bridge, and portlet is by a plurality of folding
Side is coherent to be formed, and the shape of portlet is corresponding with the side edge shape of magnetic bridge through-hole.There are three magnetic bridge through-hole is total, centre is rectangular
Shape through-hole, two sides are tetragonal through hole, and the angle of each flanging is matched with the shape of magnetic bridge through-hole.Three through-holes are along slot
Mouth magnetic bridge is evenly arranged, and is conducive to magnetic bridge saturation, is saturated through-hole surrounding magnetic field, the teeth portion magnetic line of force is hindered to enter notch oriented steel
Band, notch yoke portion width of steel band after removing through-hole there is enough intensity to guarantee；Additionally due to orientation silicon steel tangential direction
Magnetic conductivity is lower, further results in through hole and is locally saturated, reach reduction leakage field, improves magnetic energy product in main magnetic circuit.
Meanwhile orientation slots bottom yoke portion is equipped with the arc surface of indent, the junction of orientation slots bottom yoke portion and dovetail groove is equipped with circle
The large port of arc angling, orientation slots is connected with dovetail groove, and the width of dovetail groove is the 0.2-0.4 of orientation slots large port width
Times.
In another specific embodiment, annular orientation silicon steel iron core is stacked by the forward and reverse intersection of monolithic grain-oriented Si steel sheet
It forms, improves stock utilization, give full play to the higher advantage of rolling direction magnetic conductivity, while advantageously ensuring that axial plane
Degree, and increase orientation iron core homogeneity, globality and fastness；It is bonded between this outer plate and piece using epoxy glue,
Increase iron core fastness.
Specifically, orientation silicon steel monolithic design, orientation slots bottom yoke portion width need to meet enough mechanical strengths, take with nothing
Small―gap suture cooperation is carried out to silicon steel core, is reduced and is generated larger stress between two kinds of punchings cooperation silicon steel piece performance is caused to decline；
Magnetic bridge design need to guarantee mechanical strength at notch, and magnetic slot is carved and is reduced with orientation silicon steel integrated design, reduction teeth portion leakage field
Flux pulsation in air gap improves motor performance.
Annular stacks orientation silicon steel monolithic according to certain rules, and notch magnetic bridge shape of through holes rule, through hole design circularizes
For tooling (referring to Fig. 9) annular tooling by pedestal and positioning pin, positioning pin shape is consistent with orientation slots, guarantees electrical sheet assembling process
Middle no dimensional discrepancy, monolithic stack the concentricity that can guarantee entire annular core, also can improve entire iron core axially and radially
Flatness and roughness.
Specifically, annular orientation silicon steel iron core is by positive grain-oriented Si steel sheet and inverted orientation silicon steel sheet in annular tooling
It is staggeredly formed by stacking, annular tooling includes pedestal and sets positioning pin on the base, and pedestal is annular in shape, and positioning pin is two-by-two
It is arranged for one group around circular pedestal, the spacing between two adjacent groups positioning pin is matched with the size of orientation slots.Into one
Step, when positioning pin here is arranged in pairs, the positioning pin in each group can be arranged with keeping parallelism, can also two positioning
An angle is kept between pin, is conducive to the more firm of annular orientation silicon steel iron core setting in this way, is kept firmness and stabilization
Property.
When traditional No yield point stator core and stator core idle running of the invention, stator core system of the invention
At complete machine air gap sine degree be substantially better than motor made of traditional open slot No yield point stator core, Fig. 9 result surface is novel
Motor gas-gap flux density average value 0.6713T is higher than conventional motors air gap and is averaged flux density；Under each harmonic content is obvious in air gap
Drop, fundamental voltage amplitude significantly improve, and are conducive to improve motor power output and efficiency, reduce the loss of electric machine, motor is respectively obviously mentioned to performance
It is high.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Present invention specific implementation is confined to these above-mentioned explanations.For those of ordinary skill in the art to which the present invention belongs,
Without departing from the inventive concept of the premise, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the present invention
Protection scope.
Claims (7)
1. a kind of motor stator core, it is characterised in that: stator core is by annular orientation silicon steel iron core and is located at annular oriented silicon
Annular non-orientation silicon steel iron core nesting outside steel core forms, and annular orientation silicon steel iron core takes as stator teeth, annular nothing
To silicon steel core as stator yoke, annular orientation silicon steel iron core is formed by stacking by two kinds of grain-oriented Si steel sheets, annular orientation silicon steel
Iron core is equipped with orientation slots, and orientation slots and annular non-orientation silicon steel iron core fit to form enclosed slot, and orientation slots and annular are orientated
It is equipped with notch magnetic bridge between the inner sidewall of silicon steel core, is equipped with magnetic bridge through-hole at notch magnetic bridge, so that the magnetic circuit of notch magnetic bridge is full
With.
2. a kind of motor stator core according to claim 1, it is characterised in that: annular orientation silicon steel iron core is taken by forward direction
It being staggeredly formed by stacking to silicon steel sheet and inverted orientation silicon steel sheet, the orientation trench bottom of orientation silicon steel iron core is orientation slots bottom yoke portion,
Orientation slots bottom yoke portion is equipped with several dovetail grooves, each dovetail groove is connected with an orientation slots, and dovetail groove is in orientation slots
Magnetic slot is formed at notch to carve, the inner wall of the orientation slots bottom yoke portion of annular orientation silicon steel iron core and annular non-orientation silicon steel iron core it
Between form clearance fit.
3. a kind of motor stator core according to claim 1, it is characterised in that: the both ends of orientation slots are respectively large port
And portlet, portlet are connected with notch magnetic bridge, portlet is arc-shaped or is formed by a plurality of flanging is coherent, the shape of portlet
Shape is corresponding with the side edge shape of magnetic bridge through-hole, to increase notch magnetic bridge magnetic resistance.
4. a kind of motor stator core according to claim 3, it is characterised in that: there are three magnetic bridge through-hole is total, centre is
Rectangular through holes, two sides are tetragonal through hole, and the angle of each flanging is matched with the shape of magnetic bridge through-hole.
5. a kind of motor stator core according to claim 3, it is characterised in that: magnetic bridge through-hole is square hole, round hole
Or quadrilateral hole.
6. a kind of motor stator core according to claim 2, it is characterised in that: orientation slots bottom yoke portion is equipped with the circle of indent
The junction of cambered surface, orientation slots bottom yoke portion and dovetail groove is equipped with circular arc chamfering.
7. a kind of motor stator core according to claim 2, it is characterised in that: annular orientation silicon steel iron core is taken by forward direction
It is staggeredly formed by stacking in annular tooling to silicon steel sheet and inverted orientation silicon steel sheet, annular tooling includes pedestal and is located at base
Positioning pin on seat, pedestal is annular in shape, and positioning pin is one group and is arranged around circular pedestal two-by-two, two adjacent groups positioning pin
Between spacing matched with the size of orientation slots.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811636735.8A CN109861411A (en) | 2018-12-29 | 2018-12-29 | A kind of motor stator core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811636735.8A CN109861411A (en) | 2018-12-29 | 2018-12-29 | A kind of motor stator core |
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| Publication Number | Publication Date |
|---|---|
| CN109861411A true CN109861411A (en) | 2019-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811636735.8A Pending CN109861411A (en) | 2018-12-29 | 2018-12-29 | A kind of motor stator core |
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| CN (1) | CN109861411A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11888350B2 (en) | 2021-02-26 | 2024-01-30 | Huawei Digital Power Technologies Co., Ltd. | Stator, stator manufacturing method, motor, and electric vehicle |
-
2018
- 2018-12-29 CN CN201811636735.8A patent/CN109861411A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11888350B2 (en) | 2021-02-26 | 2024-01-30 | Huawei Digital Power Technologies Co., Ltd. | Stator, stator manufacturing method, motor, and electric vehicle |
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