Modularized PCB motor stator winding structure

Abstract

The invention belongs to the technical field of PCBs, and particularly provides a modularized PCB motor stator winding structure which is used for solving the problems that a traditional PCB spiral winding is low in space utilization rate of a stator, short in effective conductor, too large in end winding, large in copper loss, small in interlinking magnetic flux area, low in motor efficiency and the like. The stator comprises a PCB stator plate and a plurality of winding coils arranged on the PCB stator plate, the PCB stator plate adopts a circular disc type structure, the winding coils adopt wedge-shaped structures, and the plurality of winding coils are circumferentially and uniformly distributed on the PCB stator plate. Through the design of the winding coil of the wedge-shaped structure, the space utilization rate of the stator is effectively improved, the effective conductor length is increased, the magnetic flux distribution between the stator and the rotor is optimized, stronger magnetic field interlinking is brought, and then the no-load back electromotive force amplitude is improved; meanwhile, end loss is effectively reduced, copper loss is reduced, and motor efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of PCB (Print Circuit Board), and specifically provides a modular PCB motor stator winding structure. Background Art

[0002] The disc-type coreless motor is a permanent magnet synchronous motor with axial magnetic flux, which has many advantages such as simple structure, high efficiency, and high motor power density. Among them, the application of the stator coreless structure greatly reduces the weight of the motor body, allowing the disc-type coreless motor to run smoothly at low speed. The armature winding of the disc-type coreless motor mostly adopts the wound winding type. However, the placement of this type of winding coil is difficult, the positioning accuracy is low, and in severe cases it may even cause the winding disc to jump along the axial direction.

[0003] The disc motor stator winding based on PCB technology has many advantages, such as avoiding the hysteresis loss and eddy current loss caused by the stator core, eliminating the tooth slot torque pulsation, improving the motor power density, and reducing the noise during the operation of the motor; and the application of PCB technology simplifies the production process of the disc coreless permanent magnet motor armature, reduces the weight of the motor, makes the motor axial space more compact, and the coil positioning more accurate, which is conducive to mass production; however, the traditional PCB spiral winding has a low space utilization rate for the stator, and there are problems such as short effective conductor, too large end winding, large copper loss, small cross-linkage flux area, and low motor efficiency; based on this, the present invention provides a modular PCB motor stator winding structure. Summary of the invention

[0004] The purpose of the present invention is to provide a modular PCB motor stator winding structure to solve the problems of low space utilization of the stator, short effective conductor, too large end winding, large copper loss, small cross-linked flux area, low motor efficiency, etc. of the traditional PCB spiral winding.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A modular PCB motor stator winding structure comprises: a PCB stator plate and a plurality of winding coils arranged thereon, characterized in that the PCB stator plate adopts a circular disc structure, the winding coil adopts a wedge structure, and the plurality of winding coils are evenly distributed on the PCB stator plate in a circumferential manner.

[0007] Furthermore, the winding coil includes: a winding effective conductor, an inner end of the winding and an outer end of the winding, the inner end of the winding is arranged in an inner area close to the center of the PCB stator plate, and the outer end of the winding is arranged in an outer area close to the edge of the PCB stator plate and parallel to the inner end of the winding; one end of the winding effective conductor is connected to the inner end of the winding, and extends radially along the PCB stator plate to the outer end of the winding, and is connected in sequence to form a coil.

[0008] Furthermore, in the winding coil, the size of the inner end of each coil unit is smaller than the size of the outer end, so that the coil unit is arranged in a fan-shaped manner along the radial direction of the PCB stator plate.

[0009] Furthermore, the number of the winding coils is 6 to 12, and the number of turns of each winding coil is 12 to 16 turns.

[0010] Furthermore, the winding coil is a concentrated winding.

[0011] Furthermore, the winding coil is made of copper strips etched on a PCB stator plate.

[0012] Furthermore, the substrate of the PCB stator plate is a ceramic substrate.

[0013] Preferably, in three-dimensional space,

[0014] Based on the above technical solution, the beneficial effects of the present invention are:

[0015] The present invention provides a modular PCB motor stator winding structure, and creatively proposes a winding coil with a wedge structure; firstly, through the wedge design with a narrow inner side and a wide outer side, the coil is more tightly filled in the stator slot, the filling factor is improved, and a compact design is achieved, thereby effectively reducing the air gap in the winding, reducing copper loss, and improving the overall efficiency of the motor; secondly, the wedge design can increase the length of the effective conductor, which is helpful to optimize the magnetic field distribution between the stator and the rotor, making the magnetic flux density more uniform, and can reduce the cogging effect, reduce the vibration and noise of the motor during operation, and also can make the back electromotive force waveform closer to a sine wave, thereby improving the stability and control accuracy of the motor; finally, the winding coil with a wedge structure reduces the length of the winding end, effectively reduces the end loss, further reduces the copper loss, and improves the motor efficiency; in summary, the present invention effectively improves the overall performance of the motor, including the power density and the motor efficiency, through the winding coil design with a wedge structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a PCB motor stator winding structure provided by the present invention;

[0017] Figure 2 A schematic diagram of a winding coil of a PCB motor stator winding structure provided by the present invention;

[0018] Among them, 1 is a PCB stator board, 2 is a winding coil, 2-1 is an effective conductor of the winding, 2-2 is an inner end of the winding, and 2-3 is an outer end of the winding. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and beneficial effects of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; it should be understood that the described embodiments and drawings are only used to illustrate the present invention and do not impose any limitation on the present invention.

[0020] This embodiment provides a modular PCB motor stator winding structure, the structure of which is as follows: Figure 1 As shown, it includes: a PCB stator plate 1 and a plurality of winding coils 2 arranged thereon, wherein the PCB stator plate adopts a circular disc structure, the winding coil adopts a wedge-shaped structure, and the plurality of winding coils are evenly distributed on the PCB stator plate in a circumferential manner; each winding coil is as shown Figure 2 As shown, it includes: a winding effective conductor 2-1, a winding inner end 2-2 and a winding outer end 2-3, the winding inner end is arranged in an inner area close to the center of the PCB stator plate, and the winding outer end is arranged in an outer area close to the edge of the PCB stator plate and parallel to the winding inner end; one end of the winding effective conductor is connected to the winding inner end, and extends radially along the PCB stator plate to the winding outer end, and is connected in sequence to form a coil.

[0021] In this embodiment, the substrate of the PCB stator board is a ceramic substrate, which has higher thermal conductivity and electrical insulation, and is suitable for applications with high power density and high heat dissipation performance. The winding coil is a centralized winding made of copper bars. The stator winding structure adopts 12 winding coils, each of which includes 16 turns of coils; based on the winding coil design of the wedge structure, the inner end of each coil unit is narrower, while the outer end is wider. In three-dimensional space, the coil unit of the wedge structure is unfolded in a fan-shaped routing along the radial direction of the stator, which significantly improves the space utilization of the PCB stator board; and in the winding coil of the wedge structure, the length of the inner end and the outer end is effectively shortened, which can reduce the end loss, thereby reducing the copper loss and significantly improving the motor efficiency, and the length of the effective conductor is effectively increased, which can optimize the magnetic flux distribution between the stator and the rotor, bring stronger magnetic field linkage, and thereby increase the no-load back electromotive force amplitude. In addition, in actual application scenarios, multiple printed circuit boards are usually required to be stacked to form a stator; during the stacking process, the winding coils on the PCB stator board are connected and conducted through the vias placed on the board.

[0022] In summary, the present invention provides a modular PCB motor stator winding structure, which adopts a wedge-shaped winding coil, effectively improves the stator space utilization, increases the effective conductor length, optimizes the magnetic flux distribution between the stator and the rotor, brings stronger magnetic field cross-linkage, and thus increases the no-load back-electromotive force amplitude; at the same time, effectively reduces end loss, reduces copper loss, and improves motor efficiency.

[0023] The above description is only a specific implementation mode of the present invention. Any feature disclosed in this specification, unless otherwise stated, can be replaced by other alternative features that are equivalent or have similar purposes; all the disclosed features, or all the steps in the methods or processes, except for mutually exclusive features and / or steps, can be combined in any way.

Claims

1. A modular PCB motor stator winding structure, comprising: A PCB stator plate and a plurality of winding coils arranged thereon, characterized in that the PCB stator plate adopts a circular disc structure, the winding coil adopts a wedge structure, and the plurality of winding coils are evenly distributed on the PCB stator plate in a circumferential manner.

2. The modular PCB motor stator winding structure according to claim 1, characterized in that: The winding coil comprises: a winding effective conductor, a winding inner end and a winding outer end, wherein the winding inner end is arranged in an inner area close to the center of a PCB stator plate, and the winding outer end is arranged in an outer area close to an edge of the PCB stator plate and parallel to the winding inner end; one end of the winding effective conductor is connected to the winding inner end, and extends radially along the PCB stator plate to the winding outer end, and is sequentially connected to form a coil.

3. The modular PCB motor stator winding structure according to claim 2 is characterized in that: In the winding coil, the size of the inner end of each coil unit is smaller than the size of the outer end, so that the coil unit is arranged in a fan-shaped manner along the radial direction of the PCB stator plate.

4. The modular PCB motor stator winding structure according to claim 1, characterized in that: The number of the winding coils is 6 to 12, and the number of turns of each winding coil is 12 to 16.

5. The modular PCB motor stator winding structure according to claim 1, characterized in that: The winding coil is a concentrated winding.

6. The modular PCB motor stator winding structure according to claim 1, characterized in that: The winding coils are made of copper strips etched on the PCB stator plate.

7. The modular PCB motor stator winding structure according to claim 1, characterized in that: The substrate of the PCB stator plate is a ceramic substrate.

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