CN111262365A - A kind of motor winding and its making method - Google Patents

Abstract

The invention discloses a motor winding and a manufacturing method thereof, which are made by laminating N-layer sheet winding components, each sheet winding component is composed of a plurality of winding units arranged in a ring shape along the circumferential direction, and each winding unit is made of copper The sheets are stamped and formed, nested in sequence, and have a multi-circle annular structure to form a hollow sector shape in the middle. Multiple winding components form phases, and the ends of the winding units form terminals, where N is a positive integer. The invention optimizes the structure of the winding, effectively increases the area, and thus greatly increases the magnetic flux. By wrapping the insulating layer on the outside of the copper sheet, it is beneficial to avoid short circuit of the winding, and improves the safety and stability of the motor winding. The fan structure, the connection and the outlet are more regular, which can reduce the winding winding errors, and the production process is also very easy to check the winding errors. Further, the performance of the motor can be improved while reducing the volume of the motor, and the user experience can be improved.

Description

A kind of motor winding and its making method

technical field

The invention relates to the technical field of motors, in particular to a motor winding and a manufacturing method thereof.

Background technique

Electric machines can be classified into distributed winding generators and concentrated winding generators according to the stator coil winding scheme. Distributed winding generators can be divided into circular coils and square coils according to the cross-sectional shape of the stator windings.

In the prior art, the Chinese invention patent CN104779728A discloses the stator winding structure of the disk-type ironless permanent magnet motor and the disk-type ironless permanent magnet motor, which at least include 3 groups of staggered angles and stacked downward in the clockwise direction. The unit coil group is pressed to form a closed ring structure. Each unit coil group includes two coils that are staggered and stacked up in a clockwise direction. The inner and outer ends of the coils form the inner and outer invalid sides of the closed annular structure. The magnet scanning edges of each coil are radially arranged and distributed on the same annular surface, and all the magnet scanning edges in the winding are located in the same plane and have the same height. , the inner and outer invalid sides of each coil are respectively bent up and down relative to their corresponding magnet scanning sides and are overlapped with each other to form inner and outer overlapping parts that protrude up and down relative to the magnet scanning sides. This solution has the following disadvantages:

(1) Each unit coil, such as the first coil 11 and the second coil 12, is composed of coils that are stacked upward in sequence, and the winding method of the coils is complicated and the production efficiency is low;

(2) The winding made of copper wire lamination and winding has small magnetic flux, low conversion efficiency, large volume, heavy weight and high cost.

In view of this, there is an urgent need to improve the structure of the existing motor windings to improve production efficiency, increase magnetic flux, and improve conversion efficiency.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is that the existing winding and connection methods are complicated, which is not conducive to production, and the magnetic flux is small and the conversion efficiency is low.

In order to solve the above technical problems, the technical solution adopted in the present invention is to provide a motor winding, which is made by laminating N-layer sheet winding components, each sheet winding component is composed of a plurality of windings arranged in a ring along the circumferential direction Each of the winding units is stamped and formed by a copper sheet, which is nested in sequence to form a multi-circle annular sector shape with a hollow in the middle. The winding units are divided into groups, the winding units in each group are connected in series with each other, and the winding units corresponding to the adjacent layers in the N-layer sheet winding assembly are connected in series to form two or three phases of the motor winding, and the outermost one in each phase extends. The outgoing terminal constitutes the terminal of the phase, where N is a positive integer.

In the above technical solution, the two ends of each of the winding units are the input end and the output end, respectively, and the input ends and the output ends of the two adjacent winding units except for the connection terminals overlap in the axial direction .

In the above technical solution, the sector-shaped winding unit is divided into a straight portion on both sides and an arc portion connected with the straight portion on both sides, the straight portion is recessed downward to form a recess, and the opposite arc The shaped portion is a raised portion.

In the above technical solution, the N-layer sheet winding assemblies are divided into two groups, the sheet winding assemblies of the two groups are arranged opposite to each other, the concave portions are arranged alternately, and the arc portions thereof are arranged on top of each other.

In the above technical solution, each sheet-like winding assembly in each group of the sheet-like winding assemblies is arranged overlappingly.

In the above technical solution, the sector shape of the winding unit is formed by surrounding multiple turns of copper sheets, and a gap is provided between two adjacent turns of copper sheets.

In the above technical solution, the input end and the output end of the two-layer sheet winding components are connected by welding, and the adjacent phases are connected by welding.

Another technical solution adopted by the present invention is to provide a manufacturing method of a motor winding, comprising:

stamping the sheet-like copper sheet into the winding unit;

Arranging a plurality of the winding units in an annular shape to form the sheet winding assembly;

insulating the sheet winding assembly;

Laminating a plurality of the sheet winding components to form the motor winding;

The input end and the output end of the adjacent winding units are welded to form two or three phases, and finally the connection terminals of each phase are welded.

In the above technical solution, the sector-shaped winding unit is divided into straight portions on both sides and arc portions connected with the straight portions on both sides, and the straight portions are recessed downward to form a recessed portion.

In the above technical solution, it is characterized in that the input ends and the output ends of the two adjacent winding units except the connection terminals are overlapped in the axial direction and connected by welding.

Compared with the prior art, a motor winding and a manufacturing method thereof of the present invention are made by laminating N-layer sheet-like winding components, and each of the sheet-like winding components is composed of a plurality of winding units arranged in a ring shape along the circumferential direction. Each of the winding units is stamped and formed of copper sheets, nested in sequence, and has a multi-turn annular structure to form a hollow sector shape in the middle, a plurality of the winding components constitute phases, and the ends of the winding units constitute terminals. Among them, N is a positive integer, which optimizes the structure of the winding, is conducive to the rapid prototyping of the winding unit, effectively increases the area, and greatly increases the magnetic flux. By wrapping the insulating layer on the outside of the copper sheet, it is beneficial to avoid short circuit of the winding. The safety and stability of the motor windings are improved. The multi-turn fan surface structure makes the connection and outlet more regular, which can reduce winding winding errors. It is also very easy to troubleshoot winding errors during the production process. Further, it can reduce the size of the motor. At the same time, the performance of the motor is improved, the production efficiency of the winding is improved, and the user experience is improved.

Description of drawings

1 is a schematic diagram of the splitting of a winding unit of a motor winding in the present invention;

Fig. 2 is the structure diagram of the winding unit of the motor winding in the present invention;

Fig. 3 is the top view of the motor winding in the present invention;

Fig. 4 is the flow chart of the manufacturing method of motor winding in the present invention;

5 is a perspective view of a winding unit of the motor winding in the present invention;

Fig. 6 is the perspective view of the motor winding in the present invention;

Fig. 7 is the assembly schematic diagram of the four-layer structure of the motor winding in the present invention;

Fig. 8 is the assembly schematic diagram of the two-layer structure of the motor winding in the present invention;

FIG. 9 is a partial schematic diagram of the motor winding in the present invention.

Among them, the corresponding relationship between the reference numerals and the component names in Fig. 1 to Fig. 9 is:

1 winding unit, 2 input terminals, 3 output terminals, 4 recessed parts.

Detailed ways

The invention provides a motor winding and a manufacturing method thereof, which can improve the production efficiency, increase the magnetic flux, and improve the conversion efficiency. The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments of the description.

As shown in FIG. 1 to FIG. 3 , a motor winding provided by the present invention is made by laminating N-layer sheet winding components, and each sheet winding component is composed of a plurality of winding units arranged in a ring along the circumferential direction. Each winding unit is stamped and formed from copper sheets, nested in sequence, and has a multi-turn annular structure to form a hollow sector shape in the middle. Multiple winding components form phases, and the ends of the winding units form terminals, where N is a positive integer.

In this embodiment, the copper sheets are directly punched and formed, nested in sequence, and formed into a multi-circle annular structure to form a hollow sector shape in the middle, a plurality of sector-shaped winding units are formed into a disc shape, and N layers of copper sheets are stacked in series, which reduces the cost. , easy to manufacture, and the copper sheet is pressed and formed, which optimizes the structure of the winding, is conducive to the rapid prototyping of the winding unit, effectively increases the area, and greatly increases the magnetic flux. By wrapping the insulating layer on the outside of the copper sheet, it is beneficial to avoid The winding is short-circuited, which improves the safety and stability of the motor winding. The multi-turn fan surface structure makes the connection and outlet more regular, which can reduce winding winding errors. It is also very easy to troubleshoot winding errors during the production process. Further, it can reduce the While reducing the size of the motor, the performance of the motor is improved and the user experience is improved.

Specifically, the wire of the winding is made of copper sheet, which is placed on the punching machine, and cooperates with the mold to complete the stamping and manufacturing of the winding unit. It can be automatically produced to improve production efficiency. The copper sheet is stamped into a flat and regular-shaped winding unit. There will be no crossover between the adjacent two-layer winding units. The superimposed area increases the density of the windings, thereby increasing the magnetic flux, and improving the efficiency and output power of the motor.

Furthermore, the winding of the present invention can be used in a generator and also in an electric motor, which can improve the utilization rate of electric energy, reduce the electric power consumption of the electric motor, and achieve the purpose of high efficiency and energy saving.

In addition, the windings made by stamping copper sheets run at high speed without deformation and have a long service life.

In an embodiment of the present invention, preferably, both ends of the copper sheet are an input end and an output end, respectively, and the output end of the Nth layer copper sheet is connected to the input end of the N+1th layer copper sheet.

In this embodiment, as shown in Figure 9, by connecting the output end of the Nth layer copper sheet with the input end of the N+1th layer copper sheet, the windings of each layer are connected to each other, such as: the first layer The input terminal is A1, the output terminal is A2, the input terminal of the second layer is A3, the output terminal is A4, the input terminal of the third layer is A5, the output terminal is A6, the single winding input terminal of the fourth layer is set to A7, the output terminal Set to A8. The first winding is composed of the first layer and the fourth layer: the first layer and the second layer are separated and laminated by insulating materials, and are connected in series. The second layer and the third layer are separated and stacked by insulating materials, and are connected in series. The third layer and the fourth layer are separated and stacked by insulating materials, and are connected in series.

Among them, according to the inner winding or the outer winding of the motor, the lead wires and connecting wires can be designed in the inner circle or the outer circle respectively, or can be designed in the outer circle and the inner circle at the same time.

In this embodiment, the sector-shaped winding unit is divided into a straight part on both sides and an arc part connected with the straight part on both sides, the straight part is concave downward to form a concave part, and the opposite arc part is a convex part .

In an embodiment of the present invention, preferably, the N-layer sheet winding assemblies are divided into two groups, and the adjacent winding units of each group of sheet winding assemblies are arranged in the same direction.

In an embodiment of the present invention, preferably, adjacent winding units of each group of sheet winding assemblies are arranged in the same direction.

Specifically, the winding unit is in the shape of a sector, the straight part of which is concave downward to form an opening, the opening directions of adjacent winding units are the same, and the opening directions of the two groups of sheet winding components are arranged in opposite directions.

In an embodiment of the present invention, preferably, the sector shape of the winding unit is formed by surrounding multiple turns of copper sheets, and a gap is provided between two adjacent turns of copper sheets.

As shown in FIG. 5 , in an embodiment of the present invention, preferably, the middle portion of the fan-shaped copper sheet is recessed downward to form a recessed portion 4 , and the opposite arc-shaped portion is a raised portion.

In this embodiment, the middle part of the sector-shaped copper sheet is recessed downward, and the opposite arc-shaped part is a convex part. In order to improve the efficiency, the lower end of the middle of the winding is extruded on a plane and a height. , The magnetic steel of the motor is arranged in this recessed position, which is beneficial to improve the space utilization rate of the motor. The magnetic steel is arranged in the recessed place in the middle of the copper sheet, which is easier to produce and install.

In an embodiment of the present invention, preferably, the sector shape of the winding unit is formed by surrounding multiple turns of copper sheets, and a gap is provided between two adjacent turns of copper sheets.

In this embodiment, by setting the gap between two adjacent turns, the problem of short circuit caused by mutual contact between adjacent turns of copper sheets is effectively avoided, and the winding units arranged around increase the density of the winding, thereby increasing the magnetic flux , improve the efficiency and output power of the motor.

In an embodiment of the present invention, preferably, the motor winding includes 12 winding units, and the adjacent 4 winding units are one phase.

In this embodiment, the motor windings are set to 12 winding units, and 4 adjacent winding units are set to form one phase, so that a three-phase motor can be formed.

For example: the input terminal of the first layer is A1, the output terminal is A2, the input terminal of the second layer is A3, the output terminal is A4, the input terminal of the third layer is A5, the output terminal is A6, and the single winding input terminal of the fourth layer is set It is A7 and the output terminal is set to A8, then A1 of the first winding unit is the input terminal, and A8 of the fourth winding unit is the output terminal.

In an embodiment of the present invention, preferably, two connected layers of copper sheets are connected by welding, and adjacent phases are connected by welding.

In this embodiment, by connecting two connected layers of copper sheets by welding, and connecting adjacent phases by welding, the connection method is simple and effective, which is easier to manufacture, improves production efficiency, and reduces production costs.

In an embodiment of the present invention, preferably, the output end of the winding is connected to a wire or a conductive part, the joint on the output end of the wire is fixed on the winding body, and the winding body is fixed to the winding.

In an embodiment of the present invention, preferably, A1 on the outer circumference of a plurality of windings is connected in series and then connected to a connection terminal to form an integral connection terminal.

As shown in Figure 4, a method for manufacturing a motor winding provided by the present invention includes:

Step S102, stamping the sheet-like copper sheets into winding units one by one;

Step S104, arranging a plurality of winding units in a ring shape to form a circular ring to form a sheet winding assembly;

Step S106, insulating the sheet winding assembly;

Step S108, laminating the multi-piece sheet winding components into a third stator winding;

Step S110: Weld the input end and the output end of the adjacent winding units to form two or three phases, and finally weld the terminals of each phase.

The invention reduces the manufacturing cost and optimizes the production process of the disc winding. The copper sheet is pressed into a folded winding unit, and the workload is far less than that of copper wire winding, which effectively improves the production efficiency of the winding.

Among them, the copper sheet of the winding is a copper sheet that can be stamped and formed, or realized by a simple cutting technology, or made by cutting a copper sheet by an oxidation cutting technology.

In an embodiment of the present invention, preferably, the lower end of the middle of the winding is extruded on a plane, and the concave portion is used to place the magnetic steel.

In this embodiment, by recessing the middle of the sector-shaped copper sheet downward, in order to improve the efficiency, the lower end of the middle of the winding is extruded on a plane and a height, and the magnetic steel of the motor is set in this recessed position, which is beneficial to To improve the space utilization rate of the motor, the magnetic steel is arranged in the depression in the middle of the copper sheet, which is easier to produce and install.

As shown in Figure 6 to Figure 8, when the motor winding is provided with 8 layers, it is formed by stacking 2 windings with 4 layers. According to the speed, power and requirements of the generator, the thickness, The width and the number of turns are different, and the corresponding angle of lamination also changes.

In the production process of motor windings, two layers of windings can be stacked first, and then two two-layer windings can be stacked to form a four-layer motor winding, and so on to complete the stacking of eight layers, ten layers to N windings. pressure process.

The invention provides a motor winding and a manufacturing method thereof, including a base plate and a winding unit, a plurality of winding units are symmetrically arranged on the base plate around the center of the base plate, and the winding unit further comprises: N layers of copper sheets, the copper sheets are continuous and uninterrupted strips The N layers of copper sheets are laminated and formed, and the two adjacent layers of copper sheets are connected in series; the insulating layer is wrapped around the copper sheets to avoid short circuit of the winding and optimize the winding The structure can effectively increase the area, thereby greatly increasing the magnetic flux. By wrapping the insulating layer on the outside of the copper sheet, it is beneficial to avoid short circuit of the winding and improve the safety and stability of the motor winding. The multi-turn fan surface structure, connection and outlet More regular, it can reduce winding winding errors, and it is very easy to check winding errors during the production process. Further, it can reduce the volume of the motor while improving the performance of the motor, effectively improving the production efficiency of the winding and improving the user experience.

In the present invention, the terms "first", "second" and "third" are only used for the purpose of description, and cannot be construed as indicating or implying relative importance; the term "multiple" refers to two or two above, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be It is directly connected or indirectly connected through an intermediary. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

The present invention is not limited to the above-mentioned best embodiment. Anyone should be aware of the structural changes made under the inspiration of the present invention, and any technical solutions that are the same or similar to those of the present invention shall fall within the protection scope of the present invention. Inside.

Claims (10)

1. A motor winding, characterized in that it is made by laminating N layers of sheet-like winding components, each sheet-like winding component is composed of a plurality of winding units arranged in a ring shape along the circumferential direction, and each of the winding units It is stamped and formed from copper sheets, and is nested in sequence to form a multi-circle annular sector shape hollowed out in the middle. Among the multiple winding assemblies, the multiple winding units in each sheet-shaped winding assembly The winding units are connected in series with each other, and the winding units corresponding to the adjacent layers in the N-layer sheet winding assembly are connected in series to form two or three phases of the motor winding, and the outermost end of each phase constitutes the terminal of the phase. Among them, N is a positive integer. 2 . The motor winding according to claim 1 , wherein the two ends of each of the winding units are an input end and an output end, respectively, and two adjacent winding units except for the connection terminal. 3 . The input and output ends of the s are coincident in the axial direction. 3 . The motor winding according to claim 1 , wherein the sector-shaped winding unit is divided into linear parts on both sides and an arc-shaped part connected with the linear parts on both sides, and the linear parts are directed toward the linear part. 4 . A concave portion is formed, and the opposite arc-shaped portion is a convex portion. 4 . The motor winding according to claim 3 , wherein the sheet winding assemblies of the N layers are divided into two groups, the sheet winding assemblies of the two groups are arranged opposite to each other, and the sheet windings of the two groups are arranged in opposite directions. 5 . The concave parts of the components are arranged in a staggered manner, and the convex parts thereof are arranged in a superimposed manner. 5 . The motor winding according to claim 4 , wherein each sheet-shaped winding assembly in each group of the sheet-shaped winding assemblies is arranged overlappingly. 6 . 6 . The motor winding according to claim 1 , wherein the sector shape of the winding unit is formed by surrounding multiple turns of copper sheets, and a gap is provided between two adjacent turns of copper sheets. 7 . 7 . The motor winding according to claim 1 , wherein the input end and the output end between the two layers of sheet winding components are connected by welding, and adjacent phases are connected by welding. 8 . 8. A method of making a motor winding as claimed in claim 1, characterized in that, comprising: stamping the sheet-like copper sheet into the winding unit; Arranging a plurality of the winding units in an annular shape to form the sheet winding assembly; insulating the sheet winding assembly; Laminating a plurality of the sheet winding components to form the motor winding; The input end and the output end of the adjacent winding units are welded to form two or three phases, and finally the connection terminals of each phase are welded. 9 . The method for manufacturing a motor winding according to claim 8 , wherein the sector-shaped winding unit is divided into linear parts on both sides and an arc-shaped part connected with the linear parts on both sides, and the linear parts are 9 . It is concave downward to form a concave part, and the opposite arc-shaped part is a convex part. 10 . The method for manufacturing a motor winding according to claim 8 , wherein the input ends and the output ends of the two adjacent winding units except the connection terminals are overlapped in the axial direction and connected by welding. 11 .

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