WO2017167179A1

WO2017167179A1 - Printed circuit board stator

Info

Publication number: WO2017167179A1
Application number: PCT/CN2017/078426
Authority: WO
Inventors: 易旭
Original assignee: 擎声自动化科技（上海）有限公司
Priority date: 2016-04-01
Filing date: 2017-03-28
Publication date: 2017-10-05

Abstract

A printed circuit board stator (10) comprises an upper-layer module (1) and a lower-layer module (2). The upper-layer module and the lower-layer module each comprise a disc structure enclosed by a plurality of fan-shaped winding units (3). Each of the winding units comprises a fan-shaped printed circuit board (4). The top surface of the printed circuit board is provided with a first rotary coil, a second rotary coil, and a third rotary coil (41, 42, 43), and the bottom surface thereof is provided with a fourth rotary coil, a fifth rotary coil, and a sixth rotary coil (44, 45, 46). Each of the rotary coils comprises an external joint (47) and an internal joint (48). The external joints of the three rotary coils on the top surface and the external joints of the three rotary coils on the bottom surface are circumferentially and sequentially arranged on the printed circuit board in parallel. The internal joints of the rotary coils at corresponding positions on the top surface and the bottom surface are respectively connected by means of vias (31). The electrical angle between the upper-layer module and the lower-layer module is 360 degrees. The external joints of the rotary coils in the upper-layer module are connected to the external joints of the rotary coils at corresponding positions in the lower-layer module, respectively. Since winding units of an upper-layer module and a lower-layer module are formed by independent printed circuit boards respectively, the printed circuit board stator of the present invention is suitable for a high-power motor or generator.

Description

Printed circuit board stator

Technical field

The invention relates to a printed circuit board stator.

Background technique

The stator is the stationary part of the motor, and the stator is used in conjunction with the rotor. The stator is generally composed of a stator core, a stator winding and a base. The main function of the stator is to generate a rotating magnetic field, and the main function of the rotor is to output torque. The method of fabricating a motor stator from a printed circuit board is commonly used in the art, and as the motor power increases, the stator size also increases. However, an oversized printed circuit board can cause a lot of inconvenience or even production.

Summary of the invention

The technical problem to be solved by the present invention is to provide a printed circuit board stator, which is constructed by a plurality of independent printed circuit boards, and satisfies the high power requirements of the motor or the generator under the premise of facilitating processing, thereby overcoming the prior art. Defects.

In order to solve the above technical problem, the present invention adopts the following technical solution: a printed circuit board stator including an upper layer module and a lower layer module which are connected together and have the same structure, the stator is a three-phase winding, and the upper layer module and the lower layer module Each of the plurality of fan-shaped winding units having the same structure is surrounded by a disk-shaped structure, and each of the winding units includes a fan-shaped printed circuit board, and the top surface of the printed circuit board is arranged side by side in the circumferential direction, and the first, second, and third frames are arranged side by side in the circumferential direction. a rotating coil, the bottom surface is arranged side by side in a circumferential direction with fourth, fifth, and sixth rotating coils, and the three rotating coils of the top surface correspond to the positions of the rotating coils of the bottom surface, and the rotating coils include An outer joint and an inner joint, an outer joint of the three rotary coils of the top surface and an outer joint of three rotary coils of the bottom surface are arranged side by side in a circumferential direction on a printed circuit board, the top surface and the bottom surface The inner joints of the rotary coils corresponding to the positions are electrically connected through the via holes, and the rotary coils corresponding to the top surface and the bottom surface position are connected in series through the via holes; the upper layer module The electrical angle between the lower modules is 360 degrees, and the outer joints of the first rotary coils in the upper module are respectively connected with the outer joints of the fourth rotary coils corresponding to the positions in the lower module, and the outer joints of the second rotary coils in the upper module Connected to the outer joint of the fifth rotary coil corresponding to the position in the lower module, and the outer joint of the third rotary coil in the upper module is respectively connected with the outer joint of the sixth rotary coil corresponding to the position in the lower module, all of the One gyro coil and all of the fourth gyro coils form a phase winding, all of the second gyro coils and all of the fifth gyro coils form a phase winding, and all of the third gyro coils and all of the sixth gyro coils form a phase winding.

Preferably, the non-wiring position of the printed circuit board is a hollow structure.

Preferably, a plurality of process holes are opened on the printed circuit board.

Preferably, the outer joints of all the rotary coils are provided with pads on the top and bottom surfaces of the printed circuit board.

Preferably, all of the rotating coils are of a sector structure.

As described above, the printed circuit board stator of the present invention has the following advantageous effects:

The stator of the present invention comprises an upper layer module and a lower layer module, wherein the two layers of modules respectively form a winding unit by independent printed circuit boards, and the frame-shaped rotary coils are arranged on the printed circuit board and connected in series and in parallel, thereby effectively satisfying the high-power motor or The technical requirements of the generator, and the printed circuit board used in the present invention is not too large in size, and is easy to process to meet the overall production and processing requirements.

DRAWINGS

Figure 1 is a split view of the present invention.

Figure 2 is a front elevational view of the present invention.

Figure 3 is a cross-sectional view showing the first structure of A-A in Figure 2;

Figure 4 is a cross-sectional view showing the second structure at A-A in Figure 2;

Figure 5 is a front elevational view of the winding unit of the present invention.

Figure 6 is a rear elevational view of the winding unit of the present invention.

Fig. 7 is a structural exploded view of the present invention applied to a motor.

Figure 8 is a front elevational view of the present invention applied to a motor.

Figure 9 is a cross-sectional view taken along line B-B of Figure 8.

Figure 10 is a cross-sectional view of a plurality of series of the present invention in series.

In the figure: 10, stator 1, upper module 2, lower module

3. Winding unit 4. Printed circuit board 41. First rotating coil

42. The second rotary coil 43 , the third rotary coil 44 , and the fourth rotary coil

45, the fifth rotary coil 46, the sixth rotary coil 47, the outer joint

48, inner joint 49, connector 40, positioning part

31, through hole 32, process hole 33, connecting plate

5, the pad 6, the connector 61, the outer casing

62, turntable 63, shaft

detailed description

The structure, the proportions, the sizes and the like of the drawings are only used to cope with the contents disclosed in the specification for understanding and reading by those skilled in the art, and are not intended to limit the conditions that can be implemented by the present invention. Technical essence The meaning, the modification of any structure, the change of the proportional relationship or the adjustment of the size, should not fall under the technical content disclosed by the present invention, without affecting the effects and the achievable purposes of the present invention. Within the scope. In the meantime, the terms "upper", "lower", "previous", "post", "intermediate", and the like, are used in the description, and are not intended to limit the scope of the invention. Changes or adjustments in the relative relationship are considered to be within the scope of the present invention without substantial changes.

As shown in FIG. 1 to FIG. 6 , the present invention discloses a printed circuit board stator which is a three-phase winding structure, and the stator 10 includes an upper layer module 1 and a lower layer module 2 which are connected together and have the same structure, and the stator 10 is three. Phase winding. The upper layer module 1 and the lower layer module 2 respectively form a plurality of fan-shaped winding units 3 of the same structure to form a disk-shaped structure, and each of the winding units 3 includes a sector-shaped printed circuit board 4, as shown in FIG. 5, the printed circuit board 4 The top surface is provided with frame-shaped first, second, and third

rotary coils

41, 42, 43 along the circumferential direction. As shown in FIG. 6, the bottom surface is arranged side by side in the circumferential direction, and the fourth, fifth, and fourth frames are arranged side by side. The six-

turn coils

44, 45, 46, the three rotary coils of the top surface correspond to the positions of the rotary coils of the bottom surface, that is, the positions of the first rotary coil 41 and the fourth rotary coil 44, and the second rotary coil 42 Corresponding to the position of the fifth turning coil 45, the third turning coil 43 corresponds to the position of the sixth turning coil 46. Referring to Figures 5 and 6, the rotary coils each include an outer joint 47 and an inner joint 48, the outer joint 47 of the three rotary coils of the top surface and the outer joint 47 of the three rotary coils of the bottom surface are circumferentially Arranging on the printed circuit board 4 in parallel, the inner joints 48 of the rotary coils corresponding to the top surface and the bottom surface are electrically connected through one or more via holes 31, and the top surface is passed through the through holes 31. The rotary coils corresponding to the bottom surface positions are connected in series. Electrical connection of the rotary coil through the via is well known in the art and will not be explained too much herein. The electrical angle between the upper module 1 and the lower module 2 is 360 degrees, and the outer joint of the first rotary coil 41 in the upper module 1 is respectively connected to the outer joint of the fourth rotary coil 44 corresponding to the position in the lower module 2. The outer joint of the second rotary coil 42 in the upper module 1 is respectively connected to the outer joint of the fifth rotary coil 45 corresponding to the position in the lower module 2, and the outer joint of the third rotary coil 43 in the upper module 1 is respectively connected to the lower module. The outer joints of the sixth rotary coils 46 corresponding to the two positions are connected, all the first rotary coils 41 and all of the fourth rotary coils 44 form a phase winding, and all of the second rotary coils 42 and all of the fifth rotary coils 45 form one. The phase windings, all of the third turning coils 43 and all of the sixth turning coils 46 form a phase winding. In the present invention, the printed circuit board 4 of each winding unit 3 may be provided with one or more pieces. When the printed circuit board 4 is provided with a plurality of pieces, the pressed circuit coils are passed through the through holes on the outer joint 47 (Fig. The electrical connection is made in parallel, and the via connection between the via electrical connection and the inner connector 48 is the same; in general, the via is a through hole, and the via between the inner contacts 48 is Blind buried holes. After the coils are connected in parallel through the via holes, the resistance values of the windings of the respective phases can be effectively reduced, thereby reducing the heat generation of the windings to meet the requirements of the high-power motor or the generator.

When the invention is manufactured, the misalignment angle of the upper module 1 and the lower module 2 is calculated according to the electrical angle, ie, the machine The mechanical angle is calculated as: electrical angle = mechanical angle * pole logarithm. Among them, the circumference of the motor is set to 360 degrees in space, this angle is called the mechanical angle; the 360 degree of the electrical angle is defined according to the current to complete a complete periodic change. The number of magnetic poles contained in each phase of the motor is a pole number, and the magnetic poles appear in pairs. In this embodiment, the pole pair number is 24 as an example, and the electrical angle is 360 degrees, so the mechanical angle is 15 degrees, that is, the upper layer module 1 is relatively The lower module 2 is rotated by 15 degrees in the circumferential space to form a misalignment, specifically: the outer joint 47 of the fourth rotary coil 44 of the bottom surface of the upper module 1 and the outer rotary coil 41 of the top surface of the lower module 2 The joint 47 is directly connected vertically, and the outer joint 47 of the fifth rotary coil 45 of the bottom surface of the upper module 1 is directly connected directly to the outer joint 47 of the second rotary coil 42 of the top surface of the lower module 2, so that the bottom surface of the upper module 1 is vertically connected. The outer joint 47 of the sixth rotary coil 46 is directly connected perpendicularly to the outer joint of the third rotary coil 43 of the top surface of the lower module 2. The electrical angle in the present invention is a fixed value, and the pole pair number is determined according to actual needs, so the misalignment angle (mechanical angle) between the upper layer module 1 and the lower layer module 2 can be obtained by calculation.

In order to make all the rotary coils effectively increase the number of coils under the premise of satisfying the requirements, all the rotary coils have a fan-shaped structure. Referring to FIG. 5 or FIG. 6, according to the structure of the printed circuit board 4, it includes a straight line segment and a circular arc segment. The straight segments are parallel to the two side edges of the printed circuit board 4, and the arc segments are parallel to the outer or inner edges of the printed circuit board 4. 5 and FIG. 6, the flow direction of the current in the winding unit 3 is: taking the first rotating coil 41 as an example, when the current flows from A+ in FIG. 5, the current flows from the outer joint 47 to the inner joint according to the direction of the arrow in the figure. 48, by the action of the via 31, current flows into the fourth turning coil 44 of Fig. 6, and current flows from the inner joint 48 of the fourth turning coil 44 to the outer joint 47 in the direction of the arrow in Fig. 6, and flows out from A-. If the winding unit is the structure in the upper module 1, the current will flow from A- to the position in the lower module 2 corresponding to the A+ of the winding unit, and then the current alternately flows through the winding unit and the lower module of the upper module 1 in the above manner. The winding unit of 2 forms a complete current path. The second gyro coil 42 and the fifth gyro coil 45 are represented by B+ and B- to form a complete current path, and the third gyro coil 43 and the sixth gyro coil 46 are represented by C+ and C- to form a complete current path. In addition, the rotary coils in Figures 5 and 6 only identify a limited number of turns (coil turns), and can be made into other turns as needed in practical applications.

In this embodiment, the non-wiring position of the printed circuit board 4 is a hollow structure to facilitate better overall heat dissipation. The hollow structure is a through hole on the printed circuit board 4.

All of the rotary coils of the present invention are made by laser removal of copper foil or by chemical etching.

In the embodiment, as shown in FIG. 5 and FIG. 6, the printed circuit board 4 is provided with a plurality of process holes 32. The winding hole 3 is conveniently connected to the relevant structure by the process hole 32. In the present embodiment, as shown in FIG. 1, the upper module 1 and the lower module 2 are further determined by the two lands 33, and the two lands 33 are connected by bolts, thereby sandwiching the upper module 1 and the lower module 2 Positioning is implemented in the middle.

The outer joints 47 of all the rotary coils in this embodiment are provided with pads 5 on the top and bottom surfaces of the printed circuit board 4, and the pads are provided. 5 There is a through hole in the middle, and the surface of the pad 5 has good electrical conductivity. The pad 5 can be made by spraying tin on the copper foil, or can be made by chemically immersing the copper foil. The pads 5 may be arranged outside the printed circuit board 4 (typically for inner rotor motor/generators) or may be arranged inside the printed circuit board 4 (typically for outer rotor motors/generators).

Referring to FIG. 1, the upper layer module 1 and the lower layer module 2 are connected by a connecting member 6. The connecting member 6 is made of a metal material and has good electrical conductivity. Taking a copper bolt as an example, the upper layer passes through the pad 5. The module 1 and the lower module 2 are electrically connected, and also function as a connection fastening. Further, as shown in FIG. 3, the upper layer module 1 and the lower layer module 2 have no gap connection; as shown in FIG. 4, there is a certain gap between the upper layer module 1 and the lower layer module 2. When the space permits, the gap left between the upper module 1 and the lower module 2 can better dissipate heat from the stator 10. Since the present invention is a three-phase winding, as shown in FIG. 3, FIG. 4, FIG. 7, FIG. 9, or FIG. 10, the present invention outputs a total of six connectors 49, and six connectors 49 are two of the phase windings. The end points, that is, three are the inflow terminals of the current, and three are the outflow terminals of the current. 2 and FIG. 3, the six connectors 49 are insulated from each other, and at the same time, the pad positions corresponding to the connector 49 (ie, the bottom surface and the lower module of the printed circuit board 4 pad 5 in the upper module 1) 2 The top surface of the printed circuit board 4 pad 5) also needs to be insulated, such as spray insulating varnish or separate the upper module 1 and the lower module 2 with an insulating film. In the present invention, the connectors 6 at the positions of the six connectors 49 are made of a non-metallic material to ensure mutual insulation.

On a printed circuit board 4, the distance between adjacent rotary coils is greater than the line spacing between the coils on a single rotary coil to meet the purpose of electrical withstand voltage insulation between the windings.

7 to 9, a schematic structural view and a cross-sectional view of the stator 10 of the present invention applied to a generator or an electric motor are shown. Specifically, the printed circuit board stator formed by the upper module 1 and the lower module 2 is located in an axial magnetic field formed by a plurality of permanent magnet arrays on the two turntables 62, and the number of magnetic poles of the rotor is the same as the number of poles of the stator. When the present invention is applied to a generator, the external mechanical energy drives the rotating shaft 63 to rotate, and simultaneously drives the turntable 62 connected to the rotating shaft 63 to rotate together. At this time, the straight line segments in the respective phase windings of the stator perform cutting magnetic line motion, thereby winding each phase. The induced potential is generated and outputted by the connector 49 in the form of electric energy, and the conversion of mechanical energy to electric energy is completed; when the invention is applied to the motor, an external driver is usually required, and the driver is connected to the external AC input, and after AC/DC conversion, The PWM is performed by the power module (usually the driver is also connected to the Hall sensor for detecting the rotor position), and is again converted into an alternating current that drives the motor to operate, which generates a Lorentz force in the magnetic field, thereby causing the rotor to operate at the same speed. The mechanical energy is output through the rotating shaft 63, thereby completing the electric process.

In this embodiment, the outer edge of the printed circuit board 4 may further be provided with a positioning portion 40 extending outwardly, and the positioning portion 40 may be provided with a copper foil to improve the heat dissipation effect. It is also possible to effectively facilitate the positioning of the entire stator and the outer casing 61 by the positioning portion 40.

3 and 10 are structural cross-sectional views showing a plurality of stator structures of the present invention connected in series. Figure 10 is two inventions A schematic view of the stator 10 in series, wherein the three connectors 49 at the right end of the left stator 10 are connected and electrically connected to the connector 49 at the left end of the right stator 10, thereby implementing the series connection of the two stators 10.

In summary, the printed circuit board stator of the present invention can solve the problem that the motor power is increased and the printed circuit board is too large to be produced and processed. Therefore, the present invention effectively overcomes some practical problems in the prior art and has high utilization value and use significance.

The above-described embodiments are merely illustrative of the principles of the invention and its advantages, and are not intended to limit the invention. There are many aspects of the invention that can be modified without departing from the general idea, and those skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and scope of the invention will be covered by the appended claims.

Claims

A printed circuit board stator is characterized in that: the stator comprises an upper layer module and a lower layer module which are connected together and have the same structure, the stator is a three-phase winding, and the upper layer module and the lower layer module are respectively a plurality of fan windings having the same structure The unit is surrounded by a disk-shaped structure, and each of the winding units includes a fan-shaped printed circuit board, and the top surface of the printed circuit board is arranged side by side in a circumferential direction with first, second, and third rotating coils, and the bottom surface is arranged side by side in the circumferential direction. a fourth, fifth, and sixth rotating coil having a frame shape, wherein the three rotating coils of the top surface correspond to the positions of the rotating coils of the bottom surface, and the rotating coils each include an outer joint and an inner joint, the top The outer joint of the three rotary coils of the surface and the outer joint of the three rotary coils of the bottom surface are arranged side by side in the circumferential direction on the printed circuit board, and the inner joint of the rotary coil corresponding to the top surface and the bottom surface position The electric coils are electrically connected through the via holes, and the rotating coils corresponding to the top surface and the bottom surface are connected in series through the via holes; the electrical angle between the upper layer module and the lower layer module is 360 degrees, and the upper layer The outer joints of the first rotary coils in the block are respectively connected to the outer joints of the fourth rotary coils corresponding to the positions in the lower layer modules, and the outer joints of the second rotary coils in the upper layer modules respectively correspond to the fifth rotations of the positions in the lower layer modules. The outer joints of the coils are connected, and the outer joints of the third rotary coils in the upper module are respectively connected with the outer joints of the sixth rotary coils corresponding to the positions in the lower module, and all the first rotary coils and all the fourth rotary coils form a phase The windings, all of the second rotary coils and all of the fifth rotary coils form a phase winding, and all of the third rotary coils and all of the sixth rotary coils form a phase winding.
A printed circuit board stator according to claim 1, wherein said non-wiring position of said printed circuit board is a hollow structure.
A printed circuit board stator according to claim 1, wherein a plurality of process holes are formed in the printed circuit board.
A printed circuit board stator according to claim 1, wherein the outer joints of all the rotary coils are provided with pads on the top and bottom surfaces of the printed circuit board.
A printed circuit board stator according to claim 1 wherein all of the rotating coils are of a sector structure.