CN-122001101-A - Modularized wireless power transmission planar coupling structure and control method

CN122001101ACN 122001101 ACN122001101 ACN 122001101ACN-122001101-A

Abstract

The invention discloses a planar coupling structure based on modularized wireless power transmission and a control method thereof, and relates to the technical field of magnetic coupling type wireless power transmission. The structure of the invention can realize three-dimensional controllable and adjustable magnetic field through modularized structure arrangement and coil space orientation design, has magnetism gathering effect to improve transmission efficiency and anti-offset capability, and can actively inhibit edge magnetic leakage, thereby forming a wireless power transmission planar coupling structure with high performance, high flexibility and easy maintenance.

Inventors

LI XIAONING
GU YUQIAN
ZHANG XIAN

Assignees

河北工业大学

Dates

Publication Date: 20260508
Application Date: 20260213

Claims (10)

1. A modularized wireless power transmission planar coupling structure is characterized by comprising a plurality of magnetic field coil module groups; Each magnetic field coil module group comprises at least one main magnetic field coil module, wherein the periphery of the main magnetic field coil module is sequentially provided with a first auxiliary magnetic field coil module and a second auxiliary magnetic field coil module, and the magnetic field coil modules comprise: the main magnetic field coil module comprises a coil winding, and the coil plane of the coil winding is parallel to the plane of the coupling structure; The first auxiliary magnetic field coil module comprises a first coil winding and a second coil winding which are mutually independent, wherein the coil plane of the first coil winding is parallel to the plane of the coupling structure, and the coil plane of the second coil winding is perpendicular to the plane of the coupling structure; The second auxiliary magnetic field coil module comprises two coil windings, and coil planes of the two coil windings are parallel to the plane of the coupling structure.
2. The coupling structure according to claim 1, wherein in the first type of auxiliary magnetic field coil module, the coil plane of the first coil winding is configured with its normal direction pointing towards the geometric center of the coupling structure.
3. The coupling structure of claim 1, wherein in the second type of auxiliary magnetic field coil module, two of the coil windings are configured such that coil planes of both are coplanar and winding current directions are opposite.
4. A control method of a planar coupling structure based on modularized wireless power transmission, characterized in that the control method comprises the steps of generating a main magnetic field perpendicular to the plane of the coupling structure by exciting current according to a coil winding of the main magnetic field coil module; Wherein the coupling structure comprises a plurality of magnetic field coil module sets, each module set having the coupling structure of any one of claims 1-3.
5. The control method according to claim 4, characterized by further comprising: And according to a second coil winding of the first auxiliary magnetic field coil module, wherein the coil plane of the second coil winding is perpendicular to the plane of the coupling structure, and a magnetic field component of which the axis is in the plane of the coupling structure and points to the geometric center of the plane is generated by applying controllable current.
6. The control method according to claim 5, wherein, According to the change of the transmission distance of the planar coupling structure, the intensity and the direction of the magnetic field component are adjusted by adjusting the amplitude phase of the controllable current; and adjusting the intensity and the direction of the magnetic field component by adjusting the amplitude phase of the controllable current according to the transverse offset of the transmitting end and the receiving end of the planar coupling structure.
7. The control method according to claim 4, characterized by further comprising: According to the two coil windings of the second auxiliary magnetic field coil module, magnetic fluxes of magnetic fields generated by the two coil windings in the edge area of the coupling structure are mutually counteracted by applying currents with opposite directions.
8. The control method according to claim 4, characterized by further comprising: According to a preset magnetic field distribution target, the windings of the main magnetic field coil module, the windings of the first type auxiliary magnetic field coil module and the second type auxiliary magnetic field coil module form a three-dimensional spatially distributed composite magnetic field together by applying independent current excitation.
9. An electronic device comprising a memory and a processor, the memory configured to store one or more computer instructions, wherein the one or more computer instructions when executed by the processor implement the control method of any of claims 4-8.
10. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a computer program which, when executed by a processor, is adapted to carry out the control method according to any one of claims 4-8.

Description

Modularized wireless power transmission planar coupling structure and control method Technical Field The invention discloses a modularized wireless power transmission planar coupling structure and a control method, and relates to the technical field of magnetic coupling type wireless power transmission. Background The wireless power transmission technology (WPT) is a new technology for transmitting electric energy by means of electromagnetic fields, microwaves, lasers and other mediums, and is evaluated as subversion and revolutionary power transmission in the new energy field. The WPT technology has a flexible electrical connection mode, can solve the power supply problem of occasions where wires are not easy to pull, simplifies the connection mode and process, avoids the potential safety hazards caused by complicated processes and frequent plugging of the traditional wired connection, and the like, ensures that the power supply is safe, flexible and reliable, does not generate contact sparks, and is not influenced by severe environments. Therefore, the WPT technology is applied to the fields of medical electronic equipment, consumer electronic equipment, electric automobiles, underwater and the like. The WPT realized by adopting the magnetic field coupling mode has good feasibility, is a main technical route and research emphasis of the current WPT, uses a magnetic field as a medium, has large transmission power coverage range, can reach megawatt level at most, has the efficiency of more than 95 percent and has the transmission distance from a few centimeters to a few meters. The primary side and the secondary side of the magnetic field coupling mode WPT adopt coils as magnetic field coupling mechanisms, wherein the planar coupling mechanisms have small axial dimensions and are widely applied. Because the magnetic coupling type WPT is actually in a loose coupling structure, the magnetic field is not concentrated, larger magnetic leakage exists at the edge, meanwhile, the performance of the system is sensitive to the relative position of the coupling mechanism, the fact that the center of the primary secondary coil is parallel to the primary secondary coil and the distance is unchanged is required to be ensured, but in actual use, the primary secondary coil is easy to deviate, and the cases comprise transverse, longitudinal, distance and angular deviation are included. The offset of the coupling coil may cause a decrease in system stability, a decrease in power transfer capability, a detuning of system circuitry, an increase in energy loss, etc. The WPT practicability is seriously affected, so that the improvement of the offset resistance of the magnetically coupled WPT is an important research direction. The traditional coupling coil anti-offset design is to make the primary coil magnetic field more uniform through the coil design, so as to achieve the purpose of reducing fluctuation of system output power and the like after offset. But this will result in a loss of part of the magnetic field energy, resulting in a loss of input power and efficiency. Disclosure of Invention Aiming at the problems in the prior art, the invention provides a planar coupling structure based on modularized wireless power transmission and a control method thereof, and the adopted technical scheme is as follows: in a first aspect, a planar coupling structure based on modular wireless power transfer includes a plurality of magnetic field coil module sets; Each magnetic field coil module group comprises at least one main magnetic field coil module, wherein the periphery of the main magnetic field coil module is sequentially provided with a first auxiliary magnetic field coil module and a second auxiliary magnetic field coil module, and the magnetic field coil modules comprise: the main magnetic field coil module comprises a coil winding, and the coil plane of the coil winding is parallel to the plane of the coupling structure; The first auxiliary magnetic field coil module comprises a first coil winding and a second coil winding which are mutually independent, wherein the coil plane of the first coil winding is parallel to the plane of the coupling structure, and the coil plane of the second coil winding is perpendicular to the plane of the coupling structure; The second auxiliary magnetic field coil module comprises two coil windings, and coil planes of the two coil windings are parallel to the plane of the coupling structure. In some implementations, in the first type of auxiliary magnetic field coil module, the coil plane of the first coil winding is configured with its normal direction pointing towards the geometric center of the coupling structure. In some implementations, in the second type of auxiliary magnetic field coil module, the coil planes of the two coil windings are configured such that the coil planes of both are coplanar and the winding current directions are opposite. In a second aspect, an embodiment of the pres