CN111313586B - Coil assembly, centralized winding and axial flux motor - Google Patents
Coil assembly, centralized winding and axial flux motor Download PDFInfo
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- CN111313586B CN111313586B CN202010211508.1A CN202010211508A CN111313586B CN 111313586 B CN111313586 B CN 111313586B CN 202010211508 A CN202010211508 A CN 202010211508A CN 111313586 B CN111313586 B CN 111313586B
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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
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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
Abstract
The invention discloses a coil assembly, a centralized winding and an axial flux motor, wherein the coil assembly comprises at least two coils which are sequentially stacked and mutually connected in series; wherein, the coils are all plane heliciform wound by metal sheets; wherein, the spiral directions of two adjacent coils are opposite. The invention uses the strip-shaped metal sheet as the main body to wind the axial flux motor centralized winding, can effectively increase the slot filling rate and the space utilization rate of the end part of the winding, and has the advantage of reducing copper consumption.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a coil assembly, a centralized winding and an axial flux motor.
Background
The axial flux permanent magnet synchronous motor not only keeps the advantages of high efficiency, high power factor and the like of the traditional column type permanent magnet synchronous motor, but also shortens the axial size of the motor to a great extent due to the fact that the stator and the rotor of the axial flux permanent magnet synchronous motor are both in a thin disc shape, so that the axial flux permanent magnet synchronous motor has higher space utilization rate, and the torque density and the power density are also improved.
The fractional-slot centralized winding is a unique winding structure when the number of poles and the number of slots of a motor are relatively close, and the structure is characterized in that the pitch of coils in the winding is one slot pitch.
The stator winding of the traditional axial flux motor is wound by round wires or flat wires, and the winding of the structure has no advantages in the aspects of reducing copper consumption and improving the slot filling rate due to the fact that the sectional area of the wires is small. In recent years, a PCB winding for an axial flux motor is provided, and leads are distributed in a disc-shaped printed circuit board in a winding mode, so that the production difficulty is reduced, but the application of the PCB winding in a medium-power and high-power motor is limited due to the limitation of the thickness and the heat conducting performance of the printed circuit board. Another concentrated winding structure for an axial flux motor, which appears in recent years, is formed by stacking annular metal sheet coils along the axial direction of the motor to form each coil group, and the concentrated winding structure has advantages in terms of copper loss and slot filling rate, is suitable for medium and high power occasions and toothless slot stator structures, but has no advantages in resisting deformation caused by radial tensile stress, and is relatively complicated in production of a single coil group.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The invention is provided in view of the problems of the prior winding that the slot filling rate is poor, the copper consumption is high, and the prior winding has no advantage in resisting deformation caused by radial tensile stress.
It is therefore an object of the present invention to provide a coil assembly, a concentrated winding and an axial flux machine.
In order to solve the technical problems, the invention provides the following technical scheme: a coil assembly comprises at least two coils, wherein the coils are sequentially stacked and are mutually connected in series;
wherein, the coils are all plane heliciform wound by metal sheets;
wherein, the spiral directions of two adjacent coils are opposite.
As a preferable aspect of the coil assembly of the present invention, wherein: the surface of the metal sheet is parallel to the stacking direction of the coils.
As a preferable aspect of the coil assembly of the present invention, wherein: the coil group also comprises two wire outlet ends which are both positioned in the axial space of the coil group.
As a preferable aspect of the coil assembly of the present invention, wherein: the number of the coils is even;
the two wire outlet ends are both positioned at one end of the coil assembly, which is far away from the motor shaft, or are both positioned at one end of the coil assembly, which is close to the motor shaft.
As a preferable aspect of the coil assembly of the present invention, wherein: the coil comprises a coil body formed by winding the metal sheet, and a first connecting end and a second connecting end which are led out;
the first connecting ends of two adjacent coils are connected in series;
the second connecting end of the coil on the uppermost layer and the second connecting end of the coil on the lowermost layer form the wire outlet end.
As a preferable aspect of the coil assembly of the present invention, wherein: the first connecting ends of two adjacent coils are formed by bending the same metal sheet.
The invention also discloses a centralized winding, which comprises,
a plurality of coil groups, which are arranged along a circumferential direction;
and the coil groups with the same phase are connected in series or in parallel through the connecting wires, and the coil groups with the different phases are connected in series or in parallel through the connecting wires.
As a preferable aspect of the concentrated winding of the present invention, wherein: the connecting wire is formed by extending the metal sheet wound around the coil group outwards.
As a preferable aspect of the concentrated winding of the present invention, wherein: the connecting lines connected in series are formed by extending the same metal sheet.
The invention also discloses an axial flux motor which comprises the centralized winding.
The invention has the beneficial effects that: the invention uses the long strip metal sheet as the main body to wind the axial flux motor centralized winding, and each coil group of the winding adopts the axial multilayer winding structure with the surface of the metal sheet parallel to the motor shaft; meanwhile, the sectional area of the metal sheet is far larger than that of a traditional round wire or flat wire, so that the winding has the advantage of reducing copper consumption.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
fig. 1 is a schematic structural diagram of a coil assembly according to the present invention.
Fig. 2 is an exploded view of fig. 1.
Fig. 3 is a comparison of the motor torque test of the present invention with a prior art motor.
Fig. 4 is a schematic structural view of the coil assembly wound by the same metal sheet according to the present invention.
Fig. 5 is a schematic structural diagram of a coil assembly composed of four layers of coils according to the present invention.
Fig. 6 is a schematic structural diagram of the coil assembly with the wire outlet at the inner end.
Fig. 7 is a graph comparing the copper loss test of the motor of the present invention with that of the prior art motor.
Fig. 8 is a schematic structural diagram of a concentrated winding according to the present invention.
Fig. 9 is a schematic view of a concentrated winding of a cogging stator of the present invention.
Fig. 10 is a schematic view showing a structure of a concentrated winding of the slotless stator of the present invention.
Fig. 11 is an exploded view of the bracket of fig. 10.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Furthermore, the present invention is described in detail with reference to the drawings, and in the detailed description of the embodiments of the present invention, the cross-sectional view illustrating the structure of the device is not enlarged partially according to the general scale for convenience of illustration, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Example 1
Referring to fig. 1, there is provided a coil assembly, the coil assembly 100 including two coils 101, the two coils 101 being stacked on each other and connected in series with each other;
the coils 101 are in a planar spiral shape formed by winding metal sheets 200, and the number of winding turns of each layer of coils 101 can be equal or unequal; wherein the two coils 101 have opposite spiral directions.
Specifically, during winding, referring to fig. 2, a metal sheet 200 is taken, the first connection end 101b of the metal sheet 200 is fixed, and the second connection end 101c of the metal sheet 200 is formed into a coil body 101a by plane spiral from the left side of the first connection end 101b inwards along the clockwise direction, so that an upper coil 101-1 shown in fig. 2 is formed;
another metal sheet 200 is taken, the first connecting end 101b of the metal sheet 200 is fixed, and the second connecting end 101c of the metal sheet 200 is inwards screwed from the right side of the first connecting end 101b along the anticlockwise plane to form a coil body 101a, so that a lower coil 101-2 shown in fig. 2 is formed;
stacking the upper coil 101-1 above the lower coil 101-2, and connecting the second connection terminal 101c of the upper coil 101-1 in series with the second connection terminal 101c of the lower coil 101-2 through the connection line 300; the connecting wire 300 of this embodiment is a metal block, and the metal block is placed between the two second connecting ends 101c and then welded and fixed; of course, the skilled person can also adopt other ways to connect in series, for example, the two second connection ends 101c are directly connected by welding, or the two second connection ends 101c are connected by a wire, and the invention is not limited to the specific way of connecting in series.
Since the two stacked coils 101 have opposite spiral directions, the direction of the magnetic field generated by each layer after the single coil set is energized is the same.
Moreover, the single coil group is easy to modularly produce, and the production cost and difficulty can be reduced.
The adjacent metal sheets 200 and the two coils 101 in the same coil 101 are respectively filled with insulators, and the gap between the adjacent metal sheets 200 is filled with insulating paper in the embodiment; of course, other insulation methods, such as painting the surface of the metal sheet 200 with an insulating paint, may be adopted by those skilled in the art to achieve insulation.
In order to improve the space utilization rate of the winding and the utilization rate of the metal sheets, the gaps between the adjacent winding metal sheets are as small as possible when the metal sheets are wound by single layers in the axial multilayer winding structure of each coil group, and the axial gaps between the adjacent two layers in the axial multilayer winding structure of each coil group are as small as possible.
Because the main part of coil 101 is the slice, encircles the parcel and has almost no gap between the piece, therefore the coil assembly 100 structure of this embodiment can effectively increase the groove filling factor, has improved the space utilization of motor.
Wherein the slot fill fraction is defined as the proportion of the metal portion within the slot to the cross-sectional area of the slot.
As shown in fig. 3, the motor of the prior art and the motor of the present invention were tested under the condition that the slots were filled, wherein the winding of the motor of the prior art was wound by a conventional wire, and the torque of the two motors corresponding to different rotation speeds under the condition that the current density of the cross-section of the conductor was the same was compared.
As can be seen from the figure, the torque of the motor of the present invention is significantly greater than that of the prior art motor at the same conductor current density and speed before 4000rpm, compared to the prior art motor; because the back electromotive force is in direct proportion to the rotating speed, the back electromotive force can cause insufficient terminal voltage of a winding after the rotating speed exceeds a certain value, the back electromotive force needs to be reduced through weak magnetism to further improve the rotating speed, but the torque can be reduced, and after 4000rpm, although the torque of the motor is reduced, the torque of the motor is still larger than that of the motor in the prior art.
According to the calculation formula of the electromagnetic torque:
wherein, TeIs electromagnetic torque, p is polar logarithm, psi is flux linkage, iqIs a quadrature-axis current component, idIs a direct-axis current component, LqIs the quadrature axis inductance of the motor, LdIs the direct-axis inductance of the motor.
From the equation (1), it is understood that the higher the slot fill factor is, the larger the cross-sectional area of the metal portion of the coil in the slot is, and the larger the total current is, and therefore, the quadrature-axis current component i after the equivalent transformation is obtainedqAnd a direct-axis current component idThe greater the electromagnetic torque TeThe larger.
Example 2
Referring to fig. 4, this embodiment is different from the first embodiment in that: the second connection ends 101c of two adjacent coils 101 are formed by bending the same metal sheet 200.
During specific winding, a metal sheet 200 is taken, two ends of the metal sheet 200 are bent from the middle to the same side of the metal sheet 200, for example, the left end of the metal sheet 200 is bent towards one side along the clockwise direction, the right end of the metal sheet 200 is bent towards the same side along the counterclockwise direction, in order to enable the two ends of the metal sheet 200 to be staggered in height, two coils 101 after winding are positioned in different planes, the metal sheet 200 is bent by adopting a bending mode of forming an angle of 45 degrees on the surface of the metal sheet 200, the bending angle is 90 degrees, the left end of the bent metal sheet 200 is wound into a planar spiral coil 101 from inside to outside along the counterclockwise direction, and the redundant part of the end part of the left end of the metal sheet 200 extends outwards to form a wire outlet end 102; the right end of the bent metal sheet 200 is wound into a planar spiral coil 101 from inside to outside in the clockwise direction, and the excess part of the end part of the right end of the metal sheet 200 extends outwards to form a wire outlet end 102.
If the coil assembly 100 is composed of the multi-layer coil 101, as shown in fig. 5, the coil assembly 100 composed of the four-layer coil 101 is wound by the same metal sheet based on the above winding method.
Because adopt same sheetmetal coiling to form, compare in welded connection's mode, can reduce resistance, through bigger electric current.
Example 3
Referring to fig. 1, 2, 4, 5, 6, this embodiment differs from the above embodiment in that: two outlet ends 102 of the coil assembly 100 are both located in the axial space of the coil assembly 100; two outlet ends 102 of a single coil assembly 100 and the connecting line 300 thereof are located in the axial space of the axial multilayer winding structure, so that more space occupied by the outlet ends or the connecting line in the axial direction in the traditional single-layer winding structure is avoided, and the space utilization rate of the motor is improved.
The single coil assembly 100 is divided into an effective side, an inner end and an outer end, the effective side is a part of the coil assembly 100, which is parallel to the radial direction of the motor, the inner end is an end of the coil assembly 100, which is close to the rotating shaft of the motor, and the outer end is an end of the coil assembly 100, which is close to the shell side of the motor; in order to ensure the integrity of the effective edge and prevent the effective edge from being damaged, the main magnetic field is weakened, and when the coil assembly 100 is connected with external equipment, the inner end part or the outer end part is selected to be connected; of course, it is also feasible to make the connection at the active edge.
During specific winding, the number of the coils 101 in a single coil group 100 is even, so that two outlet ends 102 can be ensured to be positioned in the axial space of the coil group 100; as shown in fig. 4, two outlet terminals 102 are located at the outer end of the coil assembly 100; as shown in fig. 6, two outlet terminals 102 are located at the inner end of the coil assembly 100; the integrity of the active edge is guaranteed.
Example 4
Referring to fig. 1, 2, 4, 5, 6, this embodiment differs from the above embodiment in that: the surface of the metal sheet 200 is parallel to the stacking direction of the coils 101, and in particular, the surface of the metal sheet 200 is parallel to the axis of the motor. Specifically, the metal sheet 200 adopted in the embodiment is formed by cutting an H59-1 brass band, the thickness of the H59-1 brass band is 0.05-3.0 mm, the width is 10-1050 mm, and the specific width of the metal sheet 200 is determined by the number of phases, the number of poles, the number of slots and the number of winding layers of the motor.
The common winding is wound by a conducting wire, and a single wire is thin, so that the winding is easy to deform when subjected to axial tensile stress between the winding and the rotor; another type of disc motor winding is formed by stacking metal sheets in the axial direction of the motor, and as in the structure disclosed in patent CN 208445375U, when the metal sheets are subjected to axial tensile stress, the outermost metal sheet is subjected to a large tensile stress, and is prone to obviously tilt and deform.
The sheet body surface of the metal sheet 200 of the present embodiment is parallel to the motor shaft, the metal sheet 200 at the effective side extends in the motor radial direction, the metal sheet 200 at the inner end or the outer end extends in the motor circumferential direction, and the thickness of the metal sheet 200 is directed to the outermost side, and the single metal sheet 200 is hardly deformed when it is subjected to an axial tensile stress, so that the winding of this structure is advantageous in resisting axial deformation caused by an axial magnetic tensile force.
Also, the sectional area of the metal sheet 200 is much larger than that of the conventional round wire or flat wire, so that the winding is advantageous in reducing copper loss.
Referring to fig. 7, the prior art motor and the motor of the present invention are tested respectively under the condition that the total sectional areas of the windings are the same, wherein the windings of the prior art motor are wound by the conventional wire, and the copper consumption of the prior art motor and the conventional wire is compared.
Resistance calculation formula of the object:
where R is resistance, S is cross-sectional area, L is length, and ρ is resistivity.
As can be seen from the equation (2), the resistance R of the object is inversely proportional to the cross-sectional area S and proportional to the length L.
Since the slot filling ratio of the multilayer winding structure of the present embodiment is larger than that of the ordinary wire structure, the sectional area of the metal portion of the multilayer winding structure in a single slot is larger than that of the ordinary wire.
The length of the lead of the single coil group is equal to the length of a single coil multiplied by the number of turns, and the sectional area of the single metal sheet is far larger than that of the common lead, so that the single coil group is wound, the number of turns of the multilayer winding structure is obviously smaller than that of the common lead, and the length of the lead of the multilayer winding structure is obviously smaller than that of the common lead.
The resistance of a single coil assembly with a multilayer winding structure is smaller than that of a common wire coil assembly by integrating the length and the sectional area of the wire.
The calculation formula of the copper loss of the winding is as follows:
P＝R×I2 (3)
wherein P is copper loss, R is resistance, and I is current.
As can be seen from the formula (3), the copper loss P is in direct proportion to the resistance R, so that the copper loss of a single coil group with a multilayer winding structure is smaller than that of a common lead coil group on the premise of generating the same magnetomotive force.
Example 5
Referring to fig. 8, the present embodiment provides a concentrated winding, including a plurality of coil sets 100 and a plurality of connecting wires 300, where the specific number of the coil sets 100 and the connecting wires 300 is determined by the number of phases, poles, slots, and winding layers of the motor; the number of windings of each layer of coils 101 in a single coil assembly 100 is equal and the number of windings of each corresponding layer of coils 101 in different coil assemblies 100 is equal without special manufacturing or requirements.
The plurality of coil sets 100 are arranged along the circumferential direction, the coil sets 100 of the same phase are connected in series through the connecting line 300, and the coil sets 100 of the different phase are connected in series or in parallel through the connecting line 300.
Wherein, the connecting wire 300 is formed by extending the metal sheet 200 of the winding coil assembly 100;
further, the series connection line 300 is formed by extending the same metal sheet 200.
In the centralized winding of the embodiment, each coil group 100 adopts an axial multilayer winding structure in which the surface of the metal sheet 200 is parallel to the motor shaft, so that the two outlet ends 102 of a single coil group 100 and the connecting wires 300 thereof are all in the axial space of the axial multilayer winding structure, thereby avoiding the more space occupied by the outlet ends or the connecting wires in the axial direction in the traditional single-layer winding structure and improving the space utilization rate of the motor; and the winding of the structure has advantages in resisting axial deformation caused by axial magnetic pull force; meanwhile, as the main bodies of the windings are all in a sheet shape, and almost no gap is formed between the sheets in a surrounding and wrapping mode, the structure can effectively increase the slot filling rate and the space utilization rate of the end portions of the windings; the sectional area of the metal sheet is far larger than that of a traditional round wire or flat wire, so that the winding has the advantage of reducing copper consumption; the single coil group is easy to modularly produce, and the production cost and difficulty can be reduced.
Example 6
Referring to fig. 9, this embodiment differs from the above embodiment in that: an axial flux motor includes the above centralized winding, the axial flux motor of the present embodiment adopts a cogging stator structure, as shown in fig. 9, the present embodiment provides a star connection winding of a 3-phase 10-pole 12-slot axial flux motor, including a first coil group 100-1, a second coil group 100-2, a third coil group 100-3, a fourth coil group 100-4, a fifth coil group 100-5, a sixth coil group 100-6, a first connection line 300-1, a second connection line 300-2, a third connection line 300-3, a fourth connection line 300-4, a fifth connection line 300-5, a sixth connection line 300-6, a seventh connection line 300-7, and an eighth connection line 300-8; the coil groups 100 are uniformly arranged in the circumferential direction of the motor without special manufacturing or requirement.
The first coil group 100-1 and the fourth coil group 100-4 belong to a phase A, the second coil group 100-2 and the fifth coil group 100-5 belong to a phase B, the third coil group 100-3 and the sixth coil group 100-6 belong to a phase C, each coil group 100 is formed by stacking two layers of coils 101, each layer of coils 101 is wound on a stator core 400, the number of winding turns of each layer of coils 101 is 6, and the effective edge length, the inner end length and the outer end length of each coil group 100 are equal; the active, inner and outer ends of each coil assembly 100 in the winding are the same size without special manufacturing or requirements.
One outlet end of the first coil group 100-1 is connected with a first connecting line 300-1 and is used for being connected with external power supply equipment, and the other outlet end of the first coil group 100-1 is connected with one outlet end of the fourth coil group 100-4 in series through a fourth connecting line 300-4;
one wire outlet end of the second coil group 100-2 is connected with the second connecting wire 300-2 and is used for being connected with external power supply equipment, and the other wire outlet end of the second coil group 100-2 is connected with one wire outlet end of the fifth coil group 100-5 in series through the fifth connecting wire 300-5;
one wire outlet end of the third coil group 100-3 is connected with a third connecting wire 300-3 and is used for being connected with external power supply equipment, and the other wire outlet end of the third coil group 100-3 is connected with one wire outlet end of the sixth coil group 100-6 in series through a sixth connecting wire 300-6;
the other wire outlet end of the fourth coil group 100-4 is connected in series with the other wire outlet end of the fifth coil group 100-5 through a seventh connecting wire 300-7;
the other outlet end of the sixth coil group 100-6 is connected in series with the other outlet end of the fifth coil group 100-5 through an eighth connecting wire 300-8; thereby forming a star connection structure of the windings; of course, the windings may also be connected in a delta connection according to actual needs, and the connection manner is well known to those skilled in the art and will not be described herein.
Each connecting wire can be a conducting wire or an extension of an unnecessary part of the metal sheet.
Each connecting wire in the embodiment is positioned in the axial space of the axial double-layer winding structure of the coil group, so that more axial space is not occupied, and the size of the motor is favorably reduced; after the external power supply equipment is connected with a first connecting line 300-1, a second connecting line 300-2 and a third connecting line 300-3 of the ABC three-phase outlet end of the winding and is communicated with three-phase alternating current, the winding generates a magnetic field along the axial direction of the motor, and the magnetic field rotates along the circumferential direction of the motor to drive the rotor of the motor to rotate, so that the aim of outputting kinetic energy by the motor is fulfilled; when the rotor rotates under the action of external force, the magnetic field of the rotor can cut the effective edge of the winding to form induced electromotive force in the winding, so that the purpose of power generation is achieved.
Example 7
Referring to fig. 10 and 11, this embodiment is different from the above-described embodiment in that: the axial flux motor of the present embodiment adopts a stator structure without tooth slots, as shown in fig. 10, in the installation process, in order to improve the mechanical strength of the winding, a bracket 500 is used to support the concentrated winding; the support 500 comprises a support body 501, a support member 502 and a stop member 503, the support body 501 is of an annular structure, the support member 502 is uniformly distributed along the circumference of the support body 501, two side walls of the support member 502 are parallel to the radial direction of the motor, and a gap is reserved between the upper surface and the lower surface of the support member 502 and two end faces of the support body 501.
A placement groove is formed between two adjacent supports 502, the single coil groups 100 are sequentially placed in the placement groove, and the coil groups 100 are connected in series or in parallel through the connecting wire 300.
The stop part 503 is of an annular structure, the stop part 503 can be sleeved on the outer sides of the two ends of the bracket body 501, the stop part 503 and the support part 502 are fixedly connected through fixing parts such as screws or rivets, the coil assembly 100 is limited in the axial space between the two stop parts 503, the mechanical strength of the centralized winding can be improved, and the integrated winding is installed on a motor after the whole installation is completed.
It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (2)
1. A concentrated winding, characterized by: the coil assembly comprises a plurality of coil assemblies (100) which are arranged along the circumferential direction, wherein the coil assemblies (100) are positioned in the same axial space;
the coil assembly (100) comprises a first coil assembly (100-1), a second coil assembly (100-2), a third coil assembly (100-3), a fourth coil assembly (100-4), a fifth coil assembly (100-5), a sixth coil assembly (100-6), a first connecting wire (300-1), a second connecting wire (300-2), a third connecting wire (300-3), a fourth connecting wire (300-4), a fifth connecting wire (300-5), a sixth connecting wire (300-6), a seventh connecting wire (300-7) and an eighth connecting wire (300-8);
the first coil group (100-1) and the fourth coil group (100-4) belong to phase A, the second coil group (100-2) and the fifth coil group (100-5) belong to phase B, the third coil group (100-3) and the sixth coil group (100-6) belong to phase C, each coil group (100) is formed by stacking two layers of coils (101), each layer of coils (101) is wound on a stator core (400), the number of winding turns of each layer of coils (101) is 6, and the effective edge length, the inner end length and the outer end length of each coil group (100) are equal;
the preparation method of the coil assembly (100) comprises the following steps: taking a metal sheet (200), bending two ends of the metal sheet (200) from the middle part to the same side of the metal sheet (200), bending the left end of the metal sheet (200) to one side along the clockwise direction, bending the right end of the metal sheet (200) to the same side along the anticlockwise direction, bending the metal sheet (200) by adopting bending at an angle of 45 degrees on the surface of the metal sheet (200), wherein the bending angle is 90 degrees, winding the left end of the bent metal sheet (200) into a planar spiral coil (101) from inside to outside along the anticlockwise direction, and extending the redundant part of the end part of the left end of the metal sheet (200) outwards to form a wire outlet end (102); the right end of the bent metal sheet (200) is wound into a planar spiral coil (101) from inside to outside in the clockwise direction, and the redundant part of the end part of the right end of the metal sheet (200) extends outwards to form a wire outlet end (102) in the same way; wherein a surface of the metal sheet (200) is parallel to a stacking direction of the coils (101);
one wire outlet end of the first coil group (100-1) is connected with a first connecting wire (300-1) and is used for being connected with external power supply equipment, the other wire outlet end of the first coil group (100-1) is connected with one wire outlet end of the fourth coil group (100-4) in series through a fourth connecting wire (300-4), and the connecting wire (300) in series is formed by extending the same metal sheet (200);
one wire outlet end of the second coil group (100-2) is connected with the second connecting wire (300-2) and used for being connected with external power supply equipment, the other wire outlet end of the second coil group (100-2) is connected with one wire outlet end of the fifth coil group (100-5) in series through the fifth connecting wire (300-5), and the connecting wire (300) in series is formed by extending the same metal sheet (200);
one wire outlet end of the third coil group (100-3) is connected with a third connecting wire (300-3) and is used for being connected with external power supply equipment, the other wire outlet end of the third coil group (100-3) is connected with one wire outlet end of the sixth coil group (100-6) in series through a sixth connecting wire (300-6), and the connecting wire (300) in series is formed by extending the same metal sheet (200);
the other wire outlet end of the fourth coil group (100-4) is connected in series with the other wire outlet end of the fifth coil group (100-5) through a seventh connecting wire (300-7), and the connecting wire (300) in series connection is formed by extending the same metal sheet (200);
the other wire outlet end of the sixth coil group (100-6) is connected in series with the other wire outlet end of the fifth coil group (100-5) through an eighth connecting wire (300-8), and the connecting wire (300) in series connection is formed by extending the same metal sheet (200); forming a star connection structure of the windings;
each connecting line is an extension of an excess portion of the metal sheet.
2. The utility model provides an axial magnetic flux motor which characterized in that: the axial-flux electric machine includes the concentrated winding of claim 1.
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| CN113517775A (en) * | 2021-09-07 | 2021-10-19 | 北京精雕科技集团有限公司 | Non-tooth-groove disc type permanent magnet motor |
| CN113517774A (en) * | 2021-09-07 | 2021-10-19 | 北京精雕科技集团有限公司 | Electric spindle based on gearless slot motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016023816A1 (en) * | 2014-08-14 | 2016-02-18 | Wobben Properties Gmbh | Method for producing a form-wound coil for a laminated stator core |
| CN105634157A (en) * | 2016-03-20 | 2016-06-01 | 福建亚南电机有限公司 | Built-in high-power-density permanent magnet motor integrated to 8AT transmission box |
| CN109586451A (en) * | 2018-11-28 | 2019-04-05 | 华中科技大学 | Axial magnetic flux iron-core-free winding, preparation process and the magneto with the winding |
| CN109995153A (en) * | 2019-04-30 | 2019-07-09 | 天津大学 | A kind of multiple groups close the stator structure of adjustable type PCB concentratred winding |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2018002105A (en) * | 2016-07-08 | 2018-01-11 | Ntn株式会社 | Electric linear motion actuator |
| CN109660048B (en) * | 2019-01-12 | 2020-10-02 | 江苏云能电器研究院有限公司 | Design method for optimizing end part of PCB (printed circuit board) winding |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016023816A1 (en) * | 2014-08-14 | 2016-02-18 | Wobben Properties Gmbh | Method for producing a form-wound coil for a laminated stator core |
| CN105634157A (en) * | 2016-03-20 | 2016-06-01 | 福建亚南电机有限公司 | Built-in high-power-density permanent magnet motor integrated to 8AT transmission box |
| CN109586451A (en) * | 2018-11-28 | 2019-04-05 | 华中科技大学 | Axial magnetic flux iron-core-free winding, preparation process and the magneto with the winding |
| CN109995153A (en) * | 2019-04-30 | 2019-07-09 | 天津大学 | A kind of multiple groups close the stator structure of adjustable type PCB concentratred winding |
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