阅读说明：本技术 基于pcb技术的盘式无铁心电枢的结构及其制备方法 (Structure of disc type coreless armature based on PCB technology and preparation method thereof ) 是由 曾宪鹏 郭尔奇 官平 刘吉明 周鹏 于 2020-03-25 设计创作，主要内容包括：本发明公开了一种基于PCB技术的盘式无铁心电枢的结构及其制备方法,所述盘式无铁心电枢包括PCB板、第一梯形线圈、第二梯形线圈、第三梯形线圈和第四梯形线圈,所述PCB板上具有多个过孔,所述第一至第四梯形线圈成圆弧形阵列于所述PCB板上,圆弧半径相同,所述第一梯形线圈位于所述第二梯形线圈和所述第四梯形线圈之间,所述第三梯形线圈位于所述第二梯形线圈和所述第四梯形线圈之间,并位于远离所述第一梯形线圈一侧,所述第一至第四梯形线圈的数量为多个,多个所述第二梯形线圈和多个所述第四梯形线圈之间串联,多个所述PCB板采用叠压的方式通过连接柱连接,提高加工精度,解决了线圈给电机或者发电机控制设计造成的困难。(The invention discloses a structure of a disc-type coreless armature based on a PCB technology and a preparation method thereof, wherein the disc-type coreless armature comprises a PCB, a first trapezoidal coil, a second trapezoidal coil, a third trapezoidal coil and a fourth trapezoidal coil, a plurality of through holes are formed in the PCB, the first trapezoidal coil, the second trapezoidal coil, the third trapezoidal coil and the fourth trapezoidal coil are arrayed on the PCB in an arc shape, the arc radiuses are the same, the first trapezoidal coil is positioned between the second trapezoidal coil and the fourth trapezoidal coil, the third trapezoidal coil is positioned between the second trapezoidal coil and the fourth trapezoidal coil and positioned on one side far away from the first trapezoidal coil, the number of the fourth trapezoidal coil is more, the second trapezoidal coil and the fourth trapezoidal coil are connected in series, the PCB is connected through a connecting column in a laminating mode, the processing precision is improved, and the difficulty of the control design of the motor or the generator caused by the coil is solved.)

1. The structure of the disc-type coreless armature based on the PCB technology is characterized in that the disc-type coreless armature comprises a PCB, a first trapezoidal coil, a second trapezoidal coil, a third trapezoidal coil and a fourth trapezoidal coil, a plurality of through holes are formed in the PCB, the first trapezoidal coil, the second trapezoidal coil, the third trapezoidal coil and the fourth trapezoidal coil are arranged on the PCB in an arc array mode, arc radiuses are the same, the first trapezoidal coil is located between the second trapezoidal coil and the fourth trapezoidal coil, the third trapezoidal coil is located between the second trapezoidal coil and the fourth trapezoidal coil and located on one side far away from the first trapezoidal coil, the second trapezoidal coil and the fourth trapezoidal coil are connected in series, the PCB is multiple in number, and the PCB is electrically connected in a laminating mode.

2. A structure of a disc type coreless armature based on a PCB technology, according to claim 1, wherein the via holes each have a connection post, and the connection post is located in the via hole.

3. The structure of a disk type coreless armature based on the PCB technology of claim 2, wherein the via hole includes a plurality of first holes and a plurality of third holes, the first holes and the third holes are respectively formed in the PCB in a circular array, the first holes are electrically connected to the inner side ports of the first to fourth trapezoidal coils through the connection posts and are located in the first to fourth trapezoidal coils, and the third holes are connected to the outer side ports of the first trapezoidal coils and are located far from the first holes.

4. A structure of a disk type coreless armature based on a PCB technology, as recited in claim 3, wherein the via hole further includes a plurality of second holes, the plurality of second holes are circularly arrayed on the PCB, and the second holes are connected to the outer side ports of the second to fourth trapezoidal coils and located near the center of the PCB.

5. The structure of a disk-type coreless armature based on the PCB technology, according to claim 1, wherein the PCB board further includes a circuit connection line, and the circuit connection line is electrically connected to the outer port of the first trapezoidal coil and is electrically connected to the via hole.

6. A preparation method of a disk-type coreless armature based on a PCB technology is characterized by comprising the following steps:

forming a plurality of via holes in preset positions of a plurality of PCBs, wherein each via hole comprises a first hole, a second hole and a third hole, and the number of the first holes, the second holes and the third holes is multiple;

printing first to fourth trapezoidal coils on the PCB according to the position of the first hole;

and connecting the PCB boards through the connecting columns in the through holes in a laminating mode.

7. The method for manufacturing a disc-type coreless armature based on the PCB technology, according to claim 6, wherein the step of forming a plurality of via holes at predetermined positions of the PCB includes:

a plurality of first hole, the second hole with the third hole is printed in circular array respectively on the PCB board, the second hole is located and is close to PCB board center department, the third hole is located and keeps away from second hole department, first hole be located the second hole with between the third hole.

8. The method of manufacturing a disc-type coreless armature based on the PCB technology of claim 7, wherein the first to fourth trapezoidal coils are printed on the PCB board according to the position of the first hole, including:

according to the method for equalizing the width and the pitch of the conducting bars, according to the position of the first hole, from a connecting column in the first hole, a plurality of first to fourth trapezoidal coils with trapezoidal turns are formed by etching from inside to outside, the first to fourth trapezoidal coils are arranged on the PCB in an arc array, the arc radii of the first to fourth trapezoidal coils are the same, the number of the first to fourth trapezoidal coils is multiple, the first trapezoidal coil is located between the second trapezoidal coil and the fourth trapezoidal coil, the third trapezoidal coil is located between the second trapezoidal coil and the fourth trapezoidal coil and is located on a side far from the first trapezoidal coil, the coils are located in the conducting bars, the width of the conducting bars is 0.3mm to 1.0mm, and the pitch of the conducting bars is 0.05 mm to 0.8mm.

9. The method of manufacturing a disc-type coreless armature based on the PCB technology of claim 8, wherein first to fourth trapezoidal coils are printed on the PCB board according to a position of the first hole, further comprising:

when the first to fourth trapezoidal coils are printed, the outer side port of the first trapezoidal coil is respectively electrically connected with the connecting column and the circuit connecting line in the third hole, the outer side port of the second trapezoidal coil and the outer side port of the fourth trapezoidal coil are respectively connected with the connecting column in the second hole in series after being electrically connected, and the outer side port of the third trapezoidal coil is electrically connected with the connecting column in the second hole.

10. The method for manufacturing a disc-type coreless armature based on the PCB technology, as claimed in claim 9, wherein the connecting the plurality of PCBs by the connecting post in the through hole in the lamination manner includes:

the PCB boards are stacked, the through holes are connected through the connecting columns in the through holes, and conductive materials are added in the through holes, so that the PCB boards are electrically connected.

Technical Field

The invention relates to the technical field of motors and electricity, in particular to a structure of a disc type coreless armature based on a PCB technology.

Background

The permanent magnet motor has the advantages of simple structure, high power density, high efficiency and reliability in operation and the like, and is widely applied to the fields of electric automobiles, generators, industrial equipment and the like, but an armature winding is positioned in a stator core slot, and torque pulsation is generated when the motor rotates due to the cogging effect, so that the dynamic response speed is reduced, and the vibration noise is increased; the iron core of the motor is made of silicon steel sheets with high magnetic conductivity, so that the magnetic resistance of a magnetic circuit can be reduced, but the iron core accounts for 60% of the total weight of the motor, and the iron core loss of the motor is large. The design requirements can be met by manufacturing a coreless disc type permanent magnet motor (a coreless motor) by using a neodymium iron boron rare earth permanent magnet material, the disc type armature winding is divided into a wire winding type winding and a PCB winding, at present, the domestic PCB winding is mostly applied to a disc type direct current brush motor, a copper foil is adopted to punch a conducting bar, and then the conducting bar and a commutator are connected by welding, so that the processing precision is low, the coil is difficult to place and position, the shape and the size are difficult to meet the requirements, and certain difficulty is caused for the control design of the motor or a generator.

Disclosure of Invention

The invention aims to provide a structure of a disc type coreless armature based on a PCB technology and a preparation method thereof, which improve the processing precision and solve the problem that a coil causes difficulty in the control design of a motor or a generator.

In order to achieve the above objects, in a first aspect, the present invention provides a structure of a disk type coreless armature based on a PCB technology, the disk-type coreless armature comprises a PCB board, a first trapezoidal coil, a second trapezoidal coil, a third trapezoidal coil and a fourth trapezoidal coil, the PCB board is provided with a plurality of through holes, the first to fourth trapezoidal coils are arrayed on the PCB board in an arc shape with the same radius, the first trapezoidal coil is positioned between the second trapezoidal coil and the fourth trapezoidal coil, the third trapezoidal coil is positioned between the second trapezoidal coil and the fourth trapezoidal coil, and the PCB is positioned at one side far away from the first trapezoidal coil, the number of the first trapezoidal coil to the fourth trapezoidal coil is a plurality of, the second trapezoidal coil and the fourth trapezoidal coil are connected in series, the number of the PCB is a plurality of, and the PCB is electrically connected in a laminating mode.

Wherein, the via hole all has the spliced pole, the spliced pole is located in the via hole.

Wherein, the via hole includes first hole and third hole, first hole with the quantity of third hole is a plurality ofly, become respectively circular array in on the PCB board, first hole passes through the spliced pole with the medial extremity mouth electric connection of first to fourth trapezoidal coil, and be located in first to fourth trapezoidal coil, the third hole is with a plurality of the outside port of first trapezoidal coil is connected, is located and keeps away from first hole department.

The through holes further comprise a plurality of second holes, the second holes are arranged on the PCB in a circular array, and the second holes are connected with the outer side ports of the second trapezoidal coil to the fourth trapezoidal coil and are located close to the center of the PCB.

The PCB board further comprises a circuit connecting wire, and the circuit connecting wire is electrically connected with the outer side port of the first trapezoidal coil and electrically connected with the through hole.

In a second aspect, the present invention provides a method for manufacturing a disc-type coreless armature based on a PCB technology, including:

forming a plurality of via holes in preset positions of a plurality of PCBs, wherein each via hole comprises a first hole, a second hole and a third hole, and the number of the first holes, the second holes and the third holes is multiple;

printing first to fourth trapezoidal coils on the PCB according to the position of the first hole;

and connecting the PCB boards through the connecting columns in the through holes in a laminating mode.

Wherein, set up a plurality of via holes on PCB board default position, include:

a plurality of first hole, the second hole with the third hole is printed in circular array respectively on the PCB board, the second hole is located and is close to PCB board center department, the third hole is located and keeps away from second hole department, first hole be located the second hole with between the third hole.

Wherein, according to the position of the first hole, print first to fourth trapezoidal coil on PCB board, include:

according to the method for equalizing the width and the pitch of the conducting bars, according to the position of the first hole, from the connecting column in the first hole, a plurality of first to fourth trapezoidal coils with trapezoidal turns are formed by etching from inside to outside, the first to fourth trapezoidal coils are arranged on the PCB in an arc array, the arc radii are the same, the number of the first to fourth trapezoidal coils is multiple, the first trapezoidal coil is located between the second trapezoidal coil and the fourth trapezoidal coil, the third trapezoidal coil is located between the second trapezoidal coil and the fourth trapezoidal coil and is located on the side far from the first trapezoidal coil, the coils are located in the conducting bars, the width of the conducting bars is 0.3mm to 1.0mm, and the pitch of the conducting bars is 0.05 mm to 0.8mm.

Wherein, according to the position of first hole, print out first to fourth trapezoidal coil on the PCB board, still include:

when the first to fourth trapezoidal coils are printed, the outer side port of the first trapezoidal coil is respectively electrically connected with the connecting column and the circuit connecting line in the third hole, the outer side port of the second trapezoidal coil and the outer side port of the fourth trapezoidal coil are respectively connected with the connecting column in the second hole in series after being electrically connected, and the outer side port of the third trapezoidal coil is electrically connected with the connecting column in the second hole.

Wherein, adopt the pressure-superposed mode will be a plurality of the PCB board passes through spliced pole in the via hole is connected, include:

the PCB boards are stacked, the through holes are connected through the connecting columns in the through holes, and conductive materials are added in the through holes, so that the PCB boards are electrically connected.

The invention relates to a structure of a disc-type coreless armature based on a PCB technology and a preparation method thereof, wherein the disc-type coreless armature comprises a PCB, a first trapezoidal coil, a second trapezoidal coil, a third trapezoidal coil and a fourth trapezoidal coil, a plurality of through holes are arranged on the PCB, the first trapezoidal coil, the second trapezoidal coil, the third trapezoidal coil and the fourth trapezoidal coil are arrayed on the PCB in an arc shape, the arc radiuses are the same, the first trapezoidal coil is positioned between the second trapezoidal coil and the fourth trapezoidal coil, the third trapezoidal coil is positioned between the second trapezoidal coil and the fourth trapezoidal coil and positioned on one side far away from the first trapezoidal coil, the second trapezoidal coil and the fourth trapezoidal coil are connected in series, the PCBs are connected in a laminating mode through connecting columns, and conductive materials are added in the via holes, so that a plurality of PCB boards are electrically connected, the processing precision is improved, and the difficulty of the control design of the motor or the generator caused by the coil is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a disk-type coreless armature based on a PCB technology provided by the present invention.

Fig. 2 is a flow chart of coil turn number determination provided by the present invention.

Fig. 3 is a step diagram of a method for manufacturing a disc-type coreless armature based on a PCB technology.

The circuit comprises a PCB (1), a first trapezoidal coil (2), a second trapezoidal coil (3), a third trapezoidal coil (4), a fourth trapezoidal coil (5), a 6-via hole, a first hole (61), a second hole (62), a third hole (63), a connecting column (7) and a circuit connecting line (8).

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1, the present invention provides a structure of a disk coreless armature based on a PCB technology, where the disk coreless armature includes a PCB board 1, a first trapezoidal coil 2, a second trapezoidal coil 3, a third trapezoidal coil 4, and a fourth trapezoidal coil 5, where the PCB board 1 has a plurality of via holes 6, the first to fourth trapezoidal coils are arranged on the PCB board 1 in an arc array, arc radii of the first trapezoidal coil 2 are the same, the second trapezoidal coil 3 and the fourth trapezoidal coil 5 are located between the first trapezoidal coil 2, the third trapezoidal coil 4 is located between the second trapezoidal coil 3 and the fourth trapezoidal coil 5 and is located at a side far from the first trapezoidal coil 2, the number of the first to fourth trapezoidal coils is plural, the plural second trapezoidal coils 3 and the plural fourth trapezoidal coils 5 are connected in series, the number of the PCB board 1 is plural, and the electric connection is realized by adopting a laminating mode.

In the present embodiment, the disk coreless armature includes a PCB 1, a first trapezoidal coil 2, a second trapezoidal coil 3, a third trapezoidal coil 4, and a fourth trapezoidal coil 5, the PCB 1 has a plurality of through holes 6, the through holes 6 are through holes, the first to fourth trapezoidal coils are arranged in an arc array on the PCB 1, the arc radii of the first trapezoidal coil 2 are the same, the second trapezoidal coil 3 and the fourth trapezoidal coil 5 are located between the first trapezoidal coil 2 and the third trapezoidal coil 4 is located between the second trapezoidal coil 3 and the fourth trapezoidal coil 5 and on a side away from the first trapezoidal coil 2, the first to fourth trapezoidal coils are plural, the second trapezoidal coils 3 are connected in series, the fourth trapezoidal coils 5 are connected in series, and the PCB 1 is plural, by adopting a laminating mode, conductive materials are added in the through holes 6, so that the PCBs 1 are electrically connected, the processing precision is improved, and the problem that the coils cause difficulty in control design of the motor or the generator is solved.

And when the first to fourth trapezoidal coils are printed, etching the first to fourth trapezoidal coils with a plurality of turns in a trapezoidal shape from inside to outside according to the method of equal bar width and equal bar pitch, wherein the coils are positioned in the bars, the bar width is 0.3mm to 1.0mm, and the bar pitch is 0.05 mm to 0.8mm. For example, the number of layers of the printed board armature winding board of the generator is 12, the thickness of the conducting bars is 0.117mm, and the minimum spacing between adjacent conducting bars is 0.3 mm. The width of the conducting bar of the printed board armature winding is changed, the change range is 0.3-1.0 mm, and parameters such as the sectional area, the number of turns, the rated current of the stator and the like of the printed board armature winding when the width of the conducting bar is different are given in table 2.

TABLE 2 different bar width coil parameters

Serial number	Width of conducting bar/mm	Cross section of conducting bar/mm 2	Number of turns per phase coil	Rated current/A of stator
					1	0.3	0.0848	352	0.6784
2	0.4	0.1131	288	0.9049
					3	0.5	0.1414	256	1.1312
4	0.6	0.1697	224	1.3574
					5	0.7	0.1979	192	1.5832
6	0.8	0.2121	160	1.6968
					7	0.9	0.2545	128	2.0362
8	1.0	0.2828	96	2.2624

In order to enable the via hole 6 to flow a large stator current, the diameter of the via hole 6 is increased to meet design requirements, and the diameter of the via hole 6 is designed to be 0.8mm.

And the number of turns of the coil N_CAs shown in fig. 2, parameters such as generator no-load electromotive force, inductance, and current are calculated according to the initial number of turns, and whether the electrical load and current density are reasonable or not is verified according to the parameters. If the number of the initial turns is reasonable, the number of the initial turns is reasonable; if the number of the turns is not reasonable, and the number of the turns needs to be reset and then the calculation of the steps is carried out until the result is reasonable.

Further, the via holes 6 are provided with connecting columns 7, and the connecting columns 7 are located in the via holes 6.

In this embodiment, the via holes 6 all have the connecting column 7, the connecting column 7 is located in the via holes 6, specifically, the upper and lower surfaces of the PCB board 1 all have the connecting column 7 at the via holes 6, and the PCB board 1 is electrically connected through the connecting column 7.

Further, via hole 6 includes first hole 61 and third hole 63, first hole 61 with the quantity of third hole 63 is a plurality of, become circular array respectively in on the PCB board, first hole 61 passes through spliced pole 7 with the medial extremity mouth electric connection of first to fourth trapezoidal coil, and be located in first to fourth trapezoidal coil, third hole 63 is with a plurality of the outside port of first trapezoidal coil 2 is connected, is located and keeps away from first hole 61 department.

In the present embodiment, the via hole 6 includes a first hole 61 and a third hole 63, the first hole 61 and the third hole 63 are plural and are respectively circularly arrayed on the PCB board, the first hole 61 is electrically connected with the inner side ports of the first to fourth trapezoidal coils through the connecting column 7 and is located in the first to fourth trapezoidal coils, the third hole 63 is connected with the outer side ports of the first trapezoidal coils 2 and is located far away from the first hole 61, wherein the diameter of the via hole 6 is 0.8mm, so that the via hole 6 can flow a large stator current, wherein the plural PCB boards are connected through the first hole 61 and the third hole 63, for example, for 4 PCB boards, the first layer and the second layer are connected through the first hole 61, and the second layer and the third layer are connected through the third hole 63, the third and fourth layers are connected by said first hole 61.

Further, the via hole 6 further includes a plurality of second holes 62, the number of the second holes 62 is a plurality, the second holes 62 are circularly arrayed on the PCB board 1, and the second holes 62 are connected with the outer side ports of the second to fourth trapezoidal coils and located near the center of the PCB board 1.

In this embodiment, the via hole 6 further includes a plurality of second holes 62, the second holes 62 are circularly arrayed on the PCB board 1, the second holes 62 are connected to the outer side ports of the second to fourth trapezoidal coils and located near the center of the PCB board 1, and the second holes 62 are utilized to electrically connect the second to fourth trapezoidal coils together, thereby ensuring the normal use of the armature.

Further, the PCB board 1 further includes a circuit connection line 8, and the circuit connection line 9 is electrically connected to the outer side port of the first trapezoidal coil 2 and electrically connected to the via hole 6.

In this embodiment, the PCB board 1 further includes a circuit connection line 8, and the circuit connection line 9 is electrically connected to the outer side port of the first trapezoidal coil 2 on the PCB board 1, and is electrically connected to the via hole 6 on the PCB board, so that the PCB board is in a conducting state when operating.

Referring to fig. 1 to 3, the present invention provides a method for manufacturing a disk-type coreless armature based on a PCB technique, including:

s101, a plurality of via holes are formed in preset positions of a plurality of PCBs, each via hole comprises a first hole, a second hole and a third hole, and the number of the first holes, the number of the second holes and the number of the third holes are multiple.

Specifically, a plurality of via holes 6 are formed in preset positions of the plurality of PCB boards 1, the via holes 6 are different from the center of the PCB board 1 and are circularly arrayed on the PCB board 1, the specific distance is determined according to the actual situation of the disc-type coreless armature, the via holes 6 all have connecting posts 7, wherein the via holes 6 include a first hole 61, a second hole 62 and a third hole 63, the number of the first hole 61, the number of the second hole 62 and the number of the third hole 63 are all multiple, the first hole 61, the second hole 62 and the third hole 63 are respectively printed on the PCB board 1 in a circular array, the second hole 62 is located near the center of the PCB board 1, the third hole 63 is located far away from the second hole 62, and the first hole 61 is located between the second hole 62 and the third hole 63.

S102, printing first to fourth trapezoidal coils on the PCB according to the position of the first hole.

Specifically, according to the method of equal conducting bar width and equal conducting bar spacing, according to the position of the first hole 61, from the connecting column 7 in the first hole 61, a plurality of turns of first to fourth trapezoidal coils in a trapezoidal shape are etched from inside to outside, as shown in fig. 3, the first to fourth trapezoidal coils are arranged on the PCB board 1 in an arc array, the radii of arcs are the same, the number of the first to fourth trapezoidal coils is plural, the first trapezoidal coil 2 is located between the second trapezoidal coil 3 and the fourth trapezoidal coil 5, the third trapezoidal coil 4 is located between the second trapezoidal coil 3 and the fourth trapezoidal coil 5 and is located on the side far from the first trapezoidal coil 2, when the first to fourth trapezoidal coils are printed, the outer side port of the first trapezoidal coil 2 is electrically connected to the connecting column 7 and the circuit connecting line 8 in the third hole 63 respectively, the outer side ports of the second trapezoidal coil 3 and the fourth trapezoidal coil 5 are respectively in series connection with the connecting column 7 in the second hole 62 after being electrically connected, the outer side port of the third trapezoidal coil 4 is electrically connected with the connecting column 7 in the second hole 62, wherein the coils are located in the guide bar, the width of the guide bar is 0.3 mm-1.0 mm, and the distance between the guide bars is 0.05 mm-0.8 mm.

For the determination of the spacing of the conductor bars of the coil, the minimum spacing d of the conductor bars is generally determined_minDepending on the process level of the circuit board and limited by the minimum spacing required for voltage insulation between the winding conductors, particularly the spacing between adjacent two phase coil conductors, the specific data is shown in table 1 for the minimum spacing between conductors for different peak voltage requirements in the IPC specification.

TABLE 1 IPC Standard on minimum insulation spacing between PCB bars

Aiming at the determination of the width b of the coil conducting bar, the resistance of the conducting bar of the printed board armature winding needs to be as small as possible, and when the thickness of the conducting bar is fixed, the width of the conducting bar is increased to reduce the copper consumption of the stator. Meanwhile, the area of a coil formed by the conducting bars is required to be as large as possible, the interlinkage is as much as possible, and the number of turns of the coil under each pole is as much as possible, so that the purpose of improving the torque of the generator is achieved. However, the two requirements are actually contradictory, and the determination of the width b of the conducting bar should be comprehensively considered according to the actual situation, and the number of turns N of the coil of each winding_CThe number p of poles and the number q of windings of each pole of each phase are determined, the angle occupied by each winding in the circumferential direction can be determined, and then the width b of the conducting bar of the coil and the number N of turns of each winding of each layer of the coil can be determined_CThe relationship of (1) is:

the smaller the conductor width b, the number of coil turns N per winding_CHowever, the larger the winding impedance, the smaller the heat dissipation efficiency and current density limit the minimum value b of the conductor width, for example, the number of layers of the printed board armature winding board of the generator is 12, the thickness of the conducting bar is 0.117mm, and the minimum spacing between adjacent conducting bars is 0.3 mm. The width of the conducting bar of the printed board armature winding is changed, the change range is 0.3-1.0 mm, and parameters such as the sectional area, the number of turns, the rated current of the stator and the like of the printed board armature winding when the width of the conducting bar is different are given in table 2.

TABLE 2 different bar width coil parameters

In order to enable the via hole 6 to flow a large stator current, the diameter of the via hole 6 is increased to meet design requirements, and the diameter of the via hole 6 is designed to be 0.8mm.

And the number of turns of the coil N_CAs shown in fig. 2, parameters such as generator no-load electromotive force, inductance, and current are calculated according to the initial number of turns, and whether the electrical load and current density are reasonable or not is verified according to the parameters. If the number of the initial turns is reasonable, the number of the initial turns is reasonable; if the number of the turns is not reasonable, and the number of the turns needs to be reset and then the calculation of the steps is carried out until the result is reasonable.

S103, connecting the PCBs through the connecting columns in the through holes in a laminating mode.

Specifically, the number of the through holes 6 and the first to fourth trapezoidal coils of the PCB board 1 is a plurality of, a plurality of the PCB boards 1 are laminated, and are connected through the connecting columns 7, a conductive material is added in the through holes 6 to make a plurality of the PCsB plates 1 are electrically connected, and the minimum number of the PCB plates 1 required for forming the disc-type coreless armature winding is composed of the number Q/m of windings of each phase and the number N of coil turns of each winding of each layer_cAnd determining, wherein the calculation formula is as follows:

and a plurality of the connected mode of PCB board pass through first hole 61 with the third hole 63 is connected, for example, for 4 the PCB board, first layer and second floor pass through first hole 61 is connected, the second floor with the third layer pass through third hole 63 is connected, the third floor with the fourth layer pass through first hole 61 is connected, improves the machining precision, solves the coil and gives the difficulty that motor or generator control design caused.

The invention relates to a structure of a disc-type coreless armature based on a PCB technology and a preparation method thereof, wherein the disc-type coreless armature comprises a PCB (printed circuit board) 1, a first trapezoidal coil 2, a second trapezoidal coil 3, a third trapezoidal coil 4 and a fourth trapezoidal coil 5, a plurality of through holes 6 are arranged on the PCB 1, the first trapezoidal coil to the fourth trapezoidal coil are arrayed on the PCB 1 in an arc shape, the arc radiuses are the same, the first trapezoidal coil 2 is positioned between the second trapezoidal coil 3 and the fourth trapezoidal coil 5, the third trapezoidal coil 4 is positioned between the second trapezoidal coil 3 and the fourth trapezoidal coil 5 and is positioned at one side far from the first trapezoidal coil 2, the first trapezoidal coil to the fourth trapezoidal coil are in a plurality, the second trapezoidal coil 3 and the fourth trapezoidal coil 5 are connected in series, the PCB 1 is in a laminated mode, through the connection of the connecting posts 7, the conductive materials are added in the through holes 6, so that the PCBs 1 are electrically connected, the preparation of the disc type coreless armature is completed, the processing precision is improved, and the problem that the coils cause control design of a motor or a generator is solved.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.