CN110098681B - Disc type motor winding - Google Patents
Disc type motor winding Download PDFInfo
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- CN110098681B CN110098681B CN201910382402.5A CN201910382402A CN110098681B CN 110098681 B CN110098681 B CN 110098681B CN 201910382402 A CN201910382402 A CN 201910382402A CN 110098681 B CN110098681 B CN 110098681B
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- 238000004804 winding Methods 0.000 title claims abstract description 180
- 239000000463 material Substances 0.000 claims abstract description 13
- 230000000750 progressive effect Effects 0.000 claims abstract description 9
- 238000009413 insulation Methods 0.000 claims abstract description 8
- 239000011810 insulating material Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims abstract description 5
- 238000005452 bending Methods 0.000 claims abstract description 4
- 238000005520 cutting process Methods 0.000 claims abstract description 3
- 239000004020 conductor Substances 0.000 claims description 23
- 230000001965 increasing effect Effects 0.000 claims description 7
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 229920006231 aramid fiber Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 230000002500 effect on skin Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 4
- 238000009739 binding Methods 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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Classifications
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Manufacture Of Motors, Generators (AREA)
- Windings For Motors And Generators (AREA)
Abstract
本发明公开了一种盘式电机绕组。所述盘式电机绕组采用变截面结构，径向截面自内向外逐渐增大。单元绕组加工工艺包括，但不限于，线切割、弯折、焊接。变截面单元绕组间通过递进式连接方式相连，实现分层排布，构成绕组基础件。绕组基础件可包覆绝缘材料、高强度支撑材料等提高绝缘水平与结构强度。不同螺旋方向的绕组基础件可依据实际绕组排布原理连接构成各相定子绕组，提供所需方向的时变磁场。所述盘式电机绕组结构适应性强，可适用于有槽及无槽盘式电机。本发明所述盘式电机绕组结构简单、强度大、热性能优良且绕组空间利用率高，可提升盘式电机功率密度、转矩密度。
The invention discloses a disk type motor winding. The disc motor winding adopts a variable cross-section structure, and the radial cross-section gradually increases from the inside to the outside. The unit winding process includes, but is not limited to, wire cutting, bending, and welding. The variable-section unit windings are connected by a progressive connection to realize layered arrangement and form the basic winding of the winding. The winding base can be covered with insulating materials, high-strength support materials, etc. to improve the insulation level and structural strength. Winding bases with different helical directions can be connected to form stator windings of each phase according to the actual winding arrangement principle to provide a time-varying magnetic field in the required direction. The disc motor winding structure has strong adaptability and can be applied to slotted and slotless disc motors. The disk motor winding of the invention has the advantages of simple structure, high strength, excellent thermal performance and high utilization rate of winding space, and can improve the power density and torque density of the disk motor.
Description
Technical Field
The invention belongs to the field of motor design and manufacture, and particularly relates to a disc type motor winding.
Background
The permanent magnet disc type motor is compact in overall structure, and is beneficial to improvement of torque density compared with a radial magnetic field motor. The disc type motor is short in axial size, large in outer diameter and flat in machine body, and is usually applied to application occasions with large limits on axial size and size.
Disc motors have the advantages of small size, light weight, high torque density and power density, but have limited cooling and heat dissipation capabilities. If the temperature of the winding is too high, the insulation is damaged; if the temperature of the permanent magnet is too high, performance reduction and even irreversible demagnetization can be caused, and the efficiency, reliability and service life of the motor are directly influenced. How to reasonably improve the thermal performance of the disc type motor is a key technical problem to be solved urgently.
There are two ways to improve the temperature characteristics of a disc motor, one of which is active cooling, and mainly includes: the fan at the position of the motor end cover is used for enhancing air convection; various circulating liquid cooling structures are utilized to enhance heat conduction. Although the active cooling method can greatly improve the performances of the motor such as torque density, power density and the like, the external cooling equipment is required, the total mass of the motor system is increased, and the active cooling method is not suitable for being combined in fields with higher requirements on volume and weight. Which enhances heat dissipation through the motor topology. For example, the air flow velocity of the air gap is accelerated by the opposite rotating shaft, so that the air convection is enhanced.
In the prior art, starting from a main heating source of a motor winding, the current-carrying capacity, loss and temperature rise limitation are broken through less conditions. The utilization rate of the effective space of the armature winding is low in the past, and the related invention always seeks an advanced topological structure to solve the problems. One economical solution is to wind multiple strands of small-section bare wire in parallel. However, this method brings new problems, and requires reconsideration of the induced electromotive force of each conductor, which causes an increase in circulating current loss if circulating current is generated between a plurality of parallel thin wires. Another is the solution of foil winding. The method cannot effectively reduce the eddy current loss of the armature and has small applicable capacity.
The windings of the disc-type coreless permanent magnet motor are generally disc-shaped, and the effective edges of the windings are radially distributed. The winding form is mainly divided into wire-wound winding and PCB winding. The flatness of the winding type winding coil is low, the phenomenon of axial jumping can occur, and the manufacturing precision of the coil is difficult to ensure; meanwhile, the manufacturing cost of the wound winding is high. The shape of the PCB winding is relatively free, and the performance of the motor can be improved in a flexible arrangement mode. The PCB windings are distributed relatively dispersedly, the space utilization rate of the windings is limited, and the magnetic field condition of the chain of each turn of winding is different under the condition of lacking a stator core, so that the whole winding is difficult to be analyzed uniformly. Limited to materials and manufacturing processes, PCB windings are only suitable for use in situations with small capacity.
In the prior art, the winding space utilization rate and the temperature characteristic cannot be improved, and the winding topological structure is applicable to slotted and slotless disc type motor windings.
Disclosure of Invention
In view of the above-mentioned drawbacks and optimization requirements of the prior art, an object of the present invention is to provide a novel disc motor winding to improve the space utilization and current-carrying capacity of the disc motor winding, improve the temperature characteristics of the disc motor winding, and further improve the power density and torque density of the disc motor.
In order to achieve the above purpose of the present invention, the following technical solutions are mainly used for achieving the following purposes:
a winding for a disc motor, each phase winding of which comprises one or more base members of a helical winding which generate magnetic fields in the same or opposite directions. The winding base parts are connected by the unit windings in a progressive connection mode, and layered arrangement is realized. The unit winding base part adopts a variable cross-section structure, and the radial cross section is gradually increased from inside to outside.
Preferably, the winding of the variable cross-section structure unit has a smaller cross section near the center of the disc motor and a larger cross section far from the center. In the radial direction, the winding section presents an increasing trend from inside to outside, and the equivalent resistance of the unit winding in the radial direction presents a decreasing trend. The equivalent resistance close to the inner side is large, and the loss is severe; the equivalent resistance close to the outer side is small, the loss is small, and the temperature field of the winding is distributed in a step shape due to uneven loss distribution. Because the heat conduction function of the conductor is good, the stepped temperature distribution tends to be uniform under the heat conduction function. Compared with a winding structure with unchanged wire diameter, the winding current density can be improved under the same maximum temperature rise limitation.
Optionally, the variable cross-section unit winding is manufactured by, but not limited to, a whole piece of conductive material which is cut by warps, or a plurality of sections of conductive materials which are welded, or a whole section of conductor which is bent, so that the electric insulation gap of the unit winding is controllable.
Optionally, the winding base pieces are connected in layers at any position of the circumference by the variable cross-section unit windings, and include an active section (magnetic field covering part) and an inactive section (inner and outer end parts).
Alternatively, the cross-section of the unit winding includes, but is not limited to, a rectangular cross-section or a circular cross-section.
Preferably, the winding base part is formed by connecting unit windings, so that the structural consistency of the winding base part is ensured.
Optionally, the winding mode of the winding base part is a spiral structure. According to different design requirements and specific winding arrangement modes, the spiral directions of winding base parts which are adjacently connected in phase can be divided into three types: the spiral direction is the same as the clockwise spiral direction, the counterclockwise spiral direction and the opposite spiral direction. The directions of the magnetic fields generated by the same-phase adjacent winding basic parts can be divided into two types: homodromous or heterodromous.
Preferably, the connection between the winding base members adjacent in phase may be made at the inner end or the outer end of the winding.
Optionally, the disc motor winding is suitable for both slotted and slotless disc motors.
Preferably, the variable cross-section unit winding applied to the slotless disc type motor has small central gap, adopts progressive connection, is difficult to realize at the end part, and preferably adopts effective section connection; the variable cross-section unit winding applied to the slotless disc type motor has large central clearance, and the connection of an invalid section is preferred.
Optionally, the bridging portions between the unit windings are good conductors, and the material of the bridging portions includes, but is not limited to, the same conductor material as the unit windings.
Optionally, the disc motor stator is formed by one or more phase windings formed by one or more winding base members.
Preferably, the unit winding center space, the unit windings and the winding base member may be filled with an insulating material to increase the insulation level between the conductors.
Preferably, the winding base member includes, but is not limited to, a high-strength material such as carbon fiber, aramid fiber and the like is used for weaving, cladding and binding to improve the structural strength, and conductor deformation caused by large electromagnetic force is prevented.
Compared with the prior art, the technical scheme designed by the invention has the following outstanding substantive characteristics and remarkable technical progress:
1. the disc type motor winding provided by the invention adopts a variable cross-section unit winding structure, can realize the step-shaped distribution of a loss field, and leads the temperature field to tend to be uniformly distributed from the step-shaped distribution by virtue of the good heat conduction performance of the conductor.
2. The winding structure of the disc type motor provided by the invention can improve the space utilization rate of the winding in a limited space; under the same maximum temperature rise limit, the current density is increased, and the power density, the torque density and the like of the disc type motor are improved.
3. The cross-sectional area of the winding structure of the disc motor provided by the invention is far larger than that of the traditional winding, and the current-carrying capacity of the winding and the instantaneous overload multiple of the disc motor can be further improved in the same space.
4. The winding foundation part provided by the invention is composed of a plurality of unit windings and an erection part or a plurality of unit windings and a bridging part, so that the integrated production and processing are convenient, and the requirement on the motor process technology is reduced.
5. When the unit winding material provided by the invention is made of hard conductor material, the cross section area of the winding is larger, the tensile strength is higher, and the requirement on supporting material can be reduced; meanwhile, the insulation gap is easy to adjust, and the requirement on an insulation material can be reduced.
Drawings
FIG. 1 is a side view of a unit winding provided by the present invention;
FIG. 2 is a side view of a single winding base member provided by the present invention;
FIG. 3 is a side perspective view of a single winding base member provided by the present invention;
FIG. 4 is a side view of a phase winding (dual winding) that can be implemented in accordance with the present invention;
FIG. 5 is a side view of a phase winding (triple winding) that can be implemented in accordance with the present invention;
fig. 6 is a side perspective view of a phase winding (triple winding) that can be implemented in accordance with the present invention.
Detailed Description
In order to make the objects, design, manufacturing and advantages of the invention more apparent, the invention will be described in detail with reference to the accompanying drawings and preferred embodiments. The following description is only intended to illustrate the invention and should not be taken as limiting its application. And the drawings are only schematic diagrams for showing the structural design related to the invention. Based on the disclosure of the present invention, all similar applications that would occur to a practitioner of ordinary skill in the art without any inventive step are considered to be within the scope of the present invention.
The first embodiment is as follows:
referring to fig. 1 to 6, the disc type motor winding is characterized in that: each phase winding adopts a variable cross-section structure, and the radial cross section is gradually increased from inside to outside; the variable cross-section unit windings are connected in a progressive connection mode to realize layered arrangement to form a winding foundation member; the winding base part is coated with an insulating material or a high-strength supporting material so as to improve the insulating level and the structural strength; the winding base parts in different spiral directions are connected according to the actual winding arrangement principle to form stator windings of all phases, and a time-varying magnetic field in a required direction is provided; the disc type motor winding has strong structural adaptability and is suitable for slotted and slotless disc type motors. The disc type motor winding disclosed by the invention is simple in structure, high in strength, excellent in thermal performance and high in winding space utilization rate, and can improve the power density and the torque density of the disc type motor.
Example two: this embodiment is substantially the same as the first embodiment, and is characterized in that: the unit winding (figure 1) of the disc type motor winding is a variable cross-section winding, namely the cross section of the unit winding close to the inner circle of the winding is smaller, and the cross section of the unit winding close to the outer circle of the winding is larger.
The cross section of the unit winding includes, but is not limited to, a rectangular winding, a circular winding, and the like.
The unit winding includes, but is not limited to, being made of a whole piece of conducting material by warp cutting, or being made of multiple sections of conductor materials by welding, or being made of a whole section of conductor by bending, and the central gap of the unit winding can be determined by the actual required creepage distance and insulation level.
In particular, the unit windings may form a winding base part by a progressive connection (fig. 2).
The progressive connection mode is formed by progressively connecting a plurality of unit windings (201) and an erection part (202), so that the winding base part is in a spiral structure. Attachment means include, but are not limited to, welding or adhesive bonding.
In particular, the progressive connection position can be realized at any position of the circumference of the unit winding.
The spiral winding base part structure formed by the unit windings comprises a clockwise spiral and a counterclockwise spiral in the spiral direction.
Each phase winding of the disc type motor stator is formed by connecting one or more winding base parts.
The spiral direction of the same-phase adjacent winding base member includes: the spiral direction is the same as the clockwise spiral direction, the counterclockwise spiral direction and the opposite spiral direction.
Insulating materials can be filled in the central gaps of the unit windings, the unit windings and the winding base parts so as to improve the insulation level among the conductors.
The winding base part comprises, but is not limited to, the structural strength is improved by weaving, cladding and binding high-strength materials such as carbon fibers and aramid fibers, and conductor deformation caused by large electromagnetic force is prevented.
The third embodiment is basically the same as the second embodiment, and the features are as follows:
the winding structure of the disc type motor and the manufacturing method thereof can be suitable for a slotted disc type motor. The unit winding center gap size is determined by the stator slot structure.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. The technical scope of the present invention is not limited to the specific embodiments, and is defined as necessary according to the claims.
Claims (13)
1. A disc motor winding characterized by: each phase winding adopts a variable cross-section structure, and the radial cross section is gradually increased from inside to outside; the variable cross-section unit windings are connected in a progressive connection mode to realize layered arrangement to form a winding foundation member; the progressive connection mode is formed by progressively connecting a plurality of unit windings (201) and an erection part (202), and the erection part (202) is arranged between the adjacent unit windings (201) to enable the winding foundation member to be in a spiral structure; the winding base part is coated with an insulating material or a high-strength supporting material so as to improve the insulating level and the structural strength; the winding base parts in different spiral directions are connected according to the actual winding arrangement principle to form stator windings of all phases, and a time-varying magnetic field in a required direction is provided; the disc type motor winding has strong structural adaptability and is suitable for slotted and slotless disc type motors.
2. A winding for a disc motor according to claim 1, wherein: the section of the variable cross-section unit winding, which is close to the axis of the disc type motor, is smaller, and the section, which is far away from the axis, is larger; the winding section presents an increasing trend from inside to outside in the radial direction, reducing the total resistance of the winding.
3. A winding for a disc motor according to claim 1, wherein: the variable cross-section unit winding is made by cutting a whole piece of conductive material, or welding multiple sections of conductive material, or bending the whole section of conductive material.
4. A winding for a disc motor according to claim 1, wherein: the winding base part is formed by connecting a plurality of unit windings in a layering manner at any position of the circumference of the unit windings.
5. A winding for a disc motor according to claim 1, wherein: the connection process between the unit windings comprises welding or bending.
6. A winding for a disc motor according to claim 1, wherein: and adding insulating materials in the central gaps of the unit windings, between the unit windings and between the winding base parts so as to improve the insulation level between the conductors.
7. A winding for a disc motor according to claim 1, wherein: the winding base part is woven, coated and bound by using carbon fiber or aramid fiber high-strength materials to improve the structural strength, and the deformation of a hard conductor caused by large electromagnetic force is prevented.
8. A winding for a disc motor according to claim 1, wherein: the spiral direction of the winding base part is clockwise or anticlockwise.
9. A winding for a disc motor according to claim 1, wherein: the winding base part is composed of one or more coils, each phase of stator winding is composed of one or more winding base parts, and the adjacent winding base parts of each phase are connected in the same direction or in the opposite direction according to the requirement of the winding arrangement principle on the magnetic field direction.
10. A winding for a disc motor according to claim 1, wherein: the conductor cross-section is of arbitrary shape.
11. A winding for a disc motor according to claim 10, wherein: the conductor cross section is a rectangular cross section or a circular cross section.
12. A winding for a disc motor according to claim 1, wherein: the unit windings may be arranged in any manner.
13. A winding for a disc motor according to claim 12, wherein: the unit windings are arranged in an effective section turn-dividing or layering mode to reduce the skin effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910382402.5A CN110098681B (en) | 2019-05-09 | 2019-05-09 | Disc type motor winding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910382402.5A CN110098681B (en) | 2019-05-09 | 2019-05-09 | Disc type motor winding |
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| CN110098681A CN110098681A (en) | 2019-08-06 |
| CN110098681B true CN110098681B (en) | 2022-01-07 |
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| CN201910382402.5A Active CN110098681B (en) | 2019-05-09 | 2019-05-09 | Disc type motor winding |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417154B (en) * | 2019-08-15 | 2020-04-14 | 上海大学 | A Stator of Axial Flux Permanent Magnet Synchronous Motor |
| CN112803644B (en) * | 2021-02-22 | 2022-06-24 | 苏州诺雅电动车有限公司 | Disc motor and stator coil rolling manufacturing method |
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| CN110098681A (en) | 2019-08-06 |
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