CN110829663B - Seventy-two-slot six-phase low-noise stator winding - Google Patents
Seventy-two-slot six-phase low-noise stator winding Download PDFInfo
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- CN110829663B CN110829663B CN201911119227.7A CN201911119227A CN110829663B CN 110829663 B CN110829663 B CN 110829663B CN 201911119227 A CN201911119227 A CN 201911119227A CN 110829663 B CN110829663 B CN 110829663B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/48—Fastening of windings on the stator or rotor structure in slots
- H02K3/487—Slot-closing devices
- H02K3/493—Slot-closing devices magnetic
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The invention relates to the technical field of automobile generators, in particular to a seventy-two-slot six-phase low-noise stator winding which comprises a stator core, wherein 72 slots are formed at equal intervals; and the two three-phase windings are wound on the stator core, are of a triangular connection structure, and are output to six groups of rectifier diodes in parallel. The 72-slot stator assembly is characterized in that two three-phase windings are connected in parallel to output, the stator coils adopt distributed windings to form two groups of delta connection methods, and compared with a full-pitch winding of a 36-slot generator, fifth and seventh harmonics are eliminated, 36-order noise can be eliminated fundamentally, and the purpose of noise reduction is achieved; after this application stator preforming has been installed, two adjacent stator preforming stagger certain angle along the axle center for the mounting groove that all stator preforming formed inclines along certain angle, thereby makes the notch of stator preforming incline along certain angle, and this structure can reduce the harmonic, thereby reduces the electromagnetic noise of generator, and connects shell and stator core through the connector, and the dismouting is convenient, and is with low costs.
Description
Technical Field
The invention relates to the technical field of automobile generators, in particular to a seventy-two-slot six-phase low-noise stator winding.
Background
Along with the increasing living standard of people, the quantity of automobiles kept by people is increased day by day. The requirement of people on the comfort of the automobile is continuously improved, and the noise problem of the automobile generator also draws wide attention of people.
An alternator is a device that converts mechanical energy into electrical energy: the stator of the generator consists of a stator core formed by laminating cold-rolled silicon steel punching sheets and a three-phase winding wound by copper round enameled wires according to a certain requirement. The rotor rotates under the action of external mechanical force, the winding in the rotor is electrified with exciting current, under the action of the exciting current, N poles and S poles are respectively formed at the claw tip parts of the front magnetic pole and the rear magnetic pole, induced potential is generated in the three-phase winding by cutting the stator winding, and current is output after rectification. When the generator normally works, electromagnetic force waves are generated in the air gap magnetic fields of the stator and the rotor, and the radial components of the electromagnetic force waves act on the stator iron core to cause the stator to vibrate and deform, so that stronger noise is radiated, which is a main source of electromagnetic noise; the tangential component of the electromagnetic wave acts on the tooth root of the stator to cause the stator to generate vibration deformation, so that the noise is radiated, and the electromagnetic wave is an important source of the electromagnetic noise; in addition, due to the structural characteristics of the claw poles, electromagnetic noise radiated by vibration deformation of the claw poles can be quite obvious under certain specific rotating speeds, vibration of other structural components in the generator can be caused in the vibration transmission process due to a plurality of vibration transmission paths, and if the vibration frequencies of certain structural components are very close to each other, vibration can be caused, so that strong electromagnetic noise is radiated. Due to the operating principle of the alternator, it is determined that electromagnetic noise is necessarily generated during operation. How to reduce electromagnetic noise is a technical problem which needs to be solved urgently.
Disclosure of Invention
The invention provides a seventy-two-slot six-phase low-noise stator winding aiming at the problems in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a seventy-two slot six-phase low-noise stator winding comprises
The stator core is provided with 72 slots at equal intervals;
and the two three-phase windings are wound on the stator core, are of a triangular connection structure, and are output to six groups of rectifier diodes in parallel.
Preferably, the stator core is formed by overlapping a plurality of stator pressing sheets, six mounting grooves are formed in the periphery of each stator pressing sheet at equal intervals, the stator core is further provided with a shell, a shell groove is formed in the inner peripheral side of the shell, the shell groove is connected with the mounting grooves through a connecting body, and the connecting body comprises a connecting portion detachably connected with the shell groove and an inclined connecting portion detachably connected with the mounting grooves.
Preferably, the stator pressing sheets are provided with 72 notches at equal intervals, and two side groove walls of each notch are obliquely arranged along a certain slope; the two side walls of each mounting groove are obliquely arranged along a certain slope.
Preferably, the cross section of the inclined connecting part is the same as the shape of the mounting groove, and the cross sections corresponding to different positions in the axial direction rotate around the axis of the stator core.
Preferably, the shell groove is closed at one axial end.
Preferably, one axial end of the inclined connecting part is provided with a limiting head with a cross-sectional area larger than that of the inclined connecting part.
Preferably, the three-phase winding comprises a linear conductor comprising
The conductive core wire is formed by winding two copper wires;
and the insulating layer is used for coating the conductive core wire.
Preferably, each of the slots is provided with a plurality of magnetic slot wedges at intervals in the axial direction, the cross-sectional area of each of the magnetic slot wedges is the same as that of the slot opening in the circumferential direction and is smaller than the length of the cross-sectional area of the slot opening in the radial direction, and the cross-sections corresponding to different positions of the magnetic slot wedges in the axial direction rotate around the axis of the stator core.
Preferably, the magnetic slot wedge is provided with an insulating support sleeve, the outer circumference diameter of the insulating support sleeve is the same as the inner circumference diameter of the stator pressing sheet, and the radial thickness of the insulating support sleeve is 2-3 mm.
Preferably, the insulation support sleeve is provided with an axial heat dissipation groove on the inner peripheral wall and a heat dissipation through hole in the radial direction.
Advantageous effects
The 72-slot stator assembly is characterized in that two three-phase windings are connected in parallel to output, the stator coils adopt distributed windings to form two groups of delta connection methods, and compared with a full-pitch winding of a 36-slot generator, fifth and seventh harmonics are eliminated, 36-order noise can be eliminated fundamentally, and the purpose of noise reduction is achieved; after the stator pressing sheets are installed, the two adjacent stator pressing sheets are staggered by a certain angle along the axis, so that the installation grooves formed by all the stator pressing sheets are inclined along a certain angle, the notches of the stator pressing sheets are inclined along a certain angle, the structure can reduce harmonic waves, the electromagnetic noise of a generator is reduced, and the shell and the stator core are connected through the connector, so that the stator pressing sheets are convenient to disassemble and assemble and low in cost; the two smaller copper wires replace the original thicker copper wire, so that on the premise of keeping the performance of the conductive core wire unchanged, the overall volume of the winding can be reduced, the space utilization rate is improved, and the cost increased by arranging 72 grooves can be reduced; the magnetic conductivity of the stator core can be improved through the magnetic slot wedges, the hysteresis loss is reduced, the electromagnetic noise is reduced, the two adjacent magnetic slot wedges are arranged at intervals in the axial direction, the heat dissipation is facilitated, and the air circulation inside the stator is enhanced; the magnetic slot wedge is limited and fixed through the insulating support sleeve, the diameter is compared with a limiting structure arranged on a notch of the stator pressing sheet, the insulating support sleeve is adopted for limiting, the cost is lower, and the winding space of the winding cannot be influenced.
Drawings
FIG. 1 is a circuit diagram of the connection between the three-phase winding and the rectifier diode according to the present invention;
FIG. 2 is a winding layout diagram of a stator coil according to the present application;
FIG. 3 is an assembly view of a stator wafer and housing;
FIG. 4 is a top view of the connector;
FIG. 5 is a top view of a magnetic slot wedge;
fig. 6 is a top view of the insulating support sleeve.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1 and 2, a seventy-two-slot six-phase low-noise stator winding includes a stator core and two or three-phase windings. The stator core is provided with 72 slots at equal intervals, and the slot width is 2.5-3 mm, and can be 2.7 mm. And the two three-phase windings are wound on the stator core, are of a triangular connection structure and are output to six groups of rectifier diodes in parallel.
At present, a stator of a generator mostly adopts a 36-slot structure, in the process of increasing the rotating speed of an alternating-current generator, the frequency of electromagnetic force waves changes along with the change of the rotating speed, a 36-order electromagnetic noise is generated every time a rotor rotates for a circle, when the rotating speed reaches a certain specific rotating speed and is overlapped with the inherent frequency of the generator, resonance is generated, the noise is further amplified, and when the rotating speed of the generator is further increased and exceeds the resonance point, the electromagnetic noise is immediately reduced, so that the characteristics are inherent after the design and the design of the generator and cannot be fundamentally eliminated.
The 72-slot stator assembly is formed by connecting two three-phase windings in parallel for output, and the stator coil adopts distributed windings to form two groups of delta connection methods, so that five-order and seven-order harmonics are eliminated compared with a full-pitch winding of a 36-slot generator, 36-order noise can be eliminated fundamentally, and the purpose of noise reduction is achieved.
As shown in fig. 3 and 4, the stator core is formed by laminating a plurality of stator pressing sheets 1, six installation grooves are formed in the periphery of each stator pressing sheet 1 at equal intervals, the stator core is further provided with a housing 2, a housing groove is formed in the inner peripheral side of the housing 2, the housing groove is connected with the installation grooves through a connector 3, and the connector 3 includes a connecting portion 31 detachably connected with the housing groove and an inclined connecting portion 32 detachably connected with the installation grooves. The cross section of the inclined connecting portion 32 is the same as that of the mounting groove, and the cross sections corresponding to different positions in the axial direction rotate around the axis of the stator core. After the stator pressing sheets 1 are installed, the two adjacent stator pressing sheets 2 are staggered by a certain angle along the axis, so that the installation grooves formed by all the stator pressing sheets 1 are inclined along a certain angle. The structure can reduce harmonic waves, thereby reducing the electromagnetic noise of the generator, and the generator is convenient to disassemble and assemble and low in cost.
The stator pressing sheet 1 is provided with 72 notches at equal intervals, and the two side groove walls of each notch are obliquely arranged along a certain slope, so that the effect of the inclined groove formed by the stator core is better. The two side walls of each mounting groove are obliquely arranged along a certain slope, so that the stator pressing sheet 1 can be conveniently dismounted. One axial end of the shell groove is sealed, so that the connecting part 31 can be conveniently installed. The axial one end of slope connecting portion 32 is equipped with the cross-sectional area and is greater than the spacing head of slope connecting portion cross-sectional area, and the stator preforming 1 of the least significant portion can directly be placed on spacing head, has further improved stator preforming 1's installation convenience.
The three-phase winding comprises a linear conductor which comprises a conductive core wire formed by winding two copper wires and an insulating layer for coating the conductive core wire. This application replaces original thicker copper conductor with two less copper conductors, for example, the line footpath of original copper conductor is 0.4 millimeter, then this application adopts the line footpath to replace for two copper conductors of 0.17 millimeter, under the prerequisite that keeps electrically conductive heart yearn performance unchangeable, the whole volume of reducible winding on the one hand improves space utilization, on the other hand can reduce because of setting up 72 grooves (increase the groove number can make the copper material quantity of motor increase and insulating material quantity increase) and the cost that improves.
As shown in fig. 5, a plurality of magnetic slot wedges 4 are axially arranged in each slot at intervals, the cross-sectional area of each magnetic slot wedge 4 is the same as that of the slot opening in the circumferential direction and is smaller than the length of the cross-sectional area of the slot opening in the radial direction, and the cross-sections of the magnetic slot wedges 4 corresponding to different axial positions rotate around the axis of the stator core. When the stator pressing sheets 1 are stacked to a first height, the magnetic slot wedges 4 can be selectively or completely inserted into the 72 slots, when the stator pressing sheets 1 are stacked to a second height, the magnetic slot wedges 4 can be selectively or completely inserted into the 72 slots, when the stator pressing sheets 1 are stacked to a third height, the magnetic slot wedges 4 can be selectively or completely inserted into the 72 slots, and the operation is carried out until all the stator pressing sheets 1 are stacked. The magnetic conductivity of the stator core can be improved through the magnetic slot wedges 4, and the hysteresis loss is reduced, so that the electromagnetic noise is reduced. Two adjacent magnetic slot wedges 4 in the axial direction are arranged at intervals to be beneficial to heat dissipation and enhance the air circulation inside the stator. The axial length of the magnetic slot wedges 4 is shorter than the axial length of the stator core, facilitating the mounting of the magnetic slot wedges 4.
As shown in fig. 6, the magnetic slot wedge 4 is provided with an insulating support sleeve 5, the outer diameter of the insulating support sleeve 5 is the same as the inner diameter of the stator lamination 1, and the radial thickness of the insulating support sleeve 5 is 2.5 mm. The magnetic slot wedge 4 is limited and fixed through the insulating support sleeve 5, the notch of the stator pressing sheet 1 is provided with a limiting structure compared with the diameter, the insulating support sleeve 5 is adopted to limit, the cost is lower, and the winding space of the winding cannot be influenced. In addition, the arrangement of the insulating support sleeve 5 can further fix the stator core, so that the stator core is prevented from being distorted, and the noise is reduced.
The insulation support sleeve 5 is provided with axial heat dissipation grooves in the inner peripheral wall and heat dissipation through holes in the radial direction, the heat dissipation grooves and the heat dissipation through holes can prevent the insulation support sleeve 5 from influencing the heat dissipation of the motor, and the insulation support sleeve 5 is made of an insulation material with good heat dissipation performance.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and the technical contents of the present invention are all described in the claims.
Claims (6)
1. The utility model provides a seventy two groove six-phase low noise stator winding which characterized in that: comprises that
The stator core is provided with 72 slots at equal intervals;
the two three-phase windings are wound on the stator core, are of a triangular connection structure and are output to six groups of rectifier diodes in parallel;
the stator core is formed by overlapping a plurality of stator pressing sheets (1), six mounting grooves are formed in the periphery of each stator pressing sheet (1) at equal intervals, the stator core is further provided with a shell (2), a shell groove is formed in the inner peripheral side of the shell (2), the shell groove is connected with the mounting grooves through a connecting body (3), and the connecting body (3) comprises a connecting part (31) detachably connected with the shell groove and an inclined connecting part (32) detachably connected with the mounting grooves;
72 notches are formed in the stator pressing sheet (1) at equal intervals, and the two side groove walls of each notch are obliquely arranged along a certain slope; two side walls of each mounting groove are obliquely arranged along a certain slope;
a plurality of magnetic slot wedges (4) are arranged at intervals in the axial direction of each slot, the cross sectional area of each magnetic slot wedge (4) is the same as that of the slot opening in the circumferential direction and is smaller than the length of the cross sectional area of the slot opening in the radial direction, and the cross sections corresponding to different axial positions of the magnetic slot wedges (4) rotate around the axis of the stator core;
the magnetic slot wedge (4) is provided with an insulating support sleeve (5), the outer diameter of the insulating support sleeve (5) is the same as the inner diameter of the stator pressing sheet (1), and the radial thickness of the insulating support sleeve (5) is 2-3 mm.
2. A seventy-two slot six phase low noise stator winding according to claim 1, wherein: the cross section of the inclined connecting part (32) is the same as that of the mounting groove in shape, and the cross sections corresponding to different positions in the axial direction rotate around the axis of the stator core.
3. A seventy-two slot six phase low noise stator winding according to claim 1, wherein: one axial end of the shell groove is sealed.
4. A seventy-two slot six phase low noise stator winding according to claim 1, wherein: one axial end of the inclined connecting part (32) is provided with a limiting head with a cross section area larger than that of the inclined connecting part.
5. A seventy-two slot six phase low noise stator winding according to claim 1, wherein: the three-phase winding comprises a linear conductor comprising
The conductive core wire is formed by winding two copper wires;
and the insulating layer is used for coating the conductive core wire.
6. A seventy-two slot six phase low noise stator winding according to claim 1, wherein: the inner peripheral wall of the insulation support sleeve (5) is provided with an axial heat dissipation groove, and a heat dissipation through hole is formed in the radial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911119227.7A CN110829663B (en) | 2019-11-15 | 2019-11-15 | Seventy-two-slot six-phase low-noise stator winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911119227.7A CN110829663B (en) | 2019-11-15 | 2019-11-15 | Seventy-two-slot six-phase low-noise stator winding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110829663A CN110829663A (en) | 2020-02-21 |
| CN110829663B true CN110829663B (en) | 2021-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911119227.7A Active CN110829663B (en) | 2019-11-15 | 2019-11-15 | Seventy-two-slot six-phase low-noise stator winding |
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| Country | Link |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202309442U (en) * | 2011-10-20 | 2012-07-04 | 浙江工业大学 | Three-phase alternative-current asynchronous motor |
| CN103595154A (en) * | 2013-10-21 | 2014-02-19 | 刘红彬 | Chute stator |
| CN106899159A (en) * | 2017-05-10 | 2017-06-27 | 山东理工大学 | A kind of pair of △ winding alternating current generator |
| CN109713812A (en) * | 2019-02-21 | 2019-05-03 | 芜湖杰诺瑞汽车电器系统有限公司 | A kind of automobile current generator with flat wire stator winding |
-
2019
- 2019-11-15 CN CN201911119227.7A patent/CN110829663B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202309442U (en) * | 2011-10-20 | 2012-07-04 | 浙江工业大学 | Three-phase alternative-current asynchronous motor |
| CN103595154A (en) * | 2013-10-21 | 2014-02-19 | 刘红彬 | Chute stator |
| CN106899159A (en) * | 2017-05-10 | 2017-06-27 | 山东理工大学 | A kind of pair of △ winding alternating current generator |
| CN109713812A (en) * | 2019-02-21 | 2019-05-03 | 芜湖杰诺瑞汽车电器系统有限公司 | A kind of automobile current generator with flat wire stator winding |
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| Publication number | Publication date |
|---|---|
| CN110829663A (en) | 2020-02-21 |
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