Arc-shaped magnetic integrated coupler and parameter optimization method for wireless energy supply system

Abstract

An arc-shaped magnetic integrated coupler and parameter optimization method for a wireless power supply system, belonging to the field of wireless power transmission technology. The present invention is aimed at the problem that the coupling between the coupler resonant inductor and the main power transmission coil and the resonant inductor affects the transmission efficiency of the system. The coupler includes: the inner ends of the first transmitting coil P1 and the second transmitting coil P2 are arranged relative to each other to form a transmitting end arc coil, and the inner ends of the first receiving coil S1 and the second receiving coil S2 are arranged relative to each other to form a receiving end arc coil; the layout of the integrated resonant compensation inductor coil and the corresponding transmitting end arc coil or receiving end arc coil makes the integrated resonant compensation inductor coil perpendicular to the current direction in the transmitting coil or receiving coil; at most one integrated resonant compensation inductor coil is set on each transmitting coil or each receiving coil. The present invention can achieve decoupling between the transmission coil and the resonant inductor.

Description

Technical Field

[0001] The invention relates to an arc-shaped magnetic integrated coupler for a wireless energy supply system and a parameter optimization method, belonging to the technical field of wireless energy transmission. Background Art

[0002] The magnetic coupler is the core component of the wireless power transmission system to achieve non-contact energy transmission, and its performance directly determines the transmission power and efficiency of the system. However, in the actual application of most wireless power supply systems, the internal space of the electrical equipment limits the volume and magnetic field distribution range of the magnetic coupling receiving device; especially in some complex and harsh wireless power supply fields, the system has significant uncertainty and time-varying characteristics. The wireless power transmission magnetic coupler in this environment is prone to dynamic dislocation, and the coupling magnetic field changes dynamically, which seriously affects the efficiency and stability of the system. Therefore, the design and development of magnetic couplers in wireless power transmission systems is the main direction of the development of wireless power transmission technology.

[0003] In order to ensure the power density and efficiency of the wireless power transmission system, magnetic integration technology is currently used to integrate the resonant inductor and auxiliary coil in the compensation network into the main power transmission coil, and share a set of magnetic cores with the main power transmission coil to achieve the purpose of reducing the volume of magnetic components and improving the power density of the system. Looking at the current research status of magnetic integration technology in wireless power transmission systems, decoupling the resonant inductor and the main power transmission coil is conducive to simplifying the difficulty of theoretical analysis and parameter design of system circuits. Therefore, realizing the decoupling between the resonant inductor coil and the power transmission coil inside the magnetic integrated coupler has become the preferred research solution. In the existing magnetic integration technology of resonant inductor and main power transmission, since the resonant inductor coil and the main power transmission coil are in a stacked arrangement and the current directions of the two are parallel, the proximity effect between the high-frequency currents is enhanced and it is not easy to design the parameters of the resonant inductor. In addition, in existing studies, magnetic integration solutions are mostly used for planar coils, while arc couplers are mostly used in many wireless power transmission application fields such as rotary guided wireless power supply for oil and gas extraction, wireless charging systems for submersibles, and wireless power supply systems for spacecraft.

[0004] Therefore, it is necessary to comprehensively consider the relationship between the geometric parameters of the arc magnetic coupling mechanism and the circuit parameters, establish a nonlinear programming model with multiple parameters and multiple performance objective functions, and globally optimize the system to obtain the coupling mechanism parameters that meet the system performance requirements. Summary of the invention

[0005] In order to solve the problem that the coupling between the coupler resonant inductor and the main power transmission coil and the coupling between the resonant inductors affect the system transmission efficiency, the present invention provides an arc-shaped magnetic integrated coupler for a wireless power supply system and a parameter optimization method.

[0006] The arc-shaped magnetic integrated coupler for a wireless energy supply system of the present invention comprises a first transmitting coil P1, a second transmitting coil P2, a first receiving coil S1, a second receiving coil S2 and at least two and no more than four integrated resonant compensation inductor coils.

[0007] The first transmitting coil P1, the second transmitting coil P2, the first receiving coil S1 and the second receiving coil S2 are arc coils with the same structure. The inner ends of the first transmitting coil P1 and the second transmitting coil P2 are arranged relative to each other to form a transmitting end arc coil, and the inner ends of the first receiving coil S1 and the second receiving coil S2 are arranged relative to each other to form a receiving end arc coil. The transmitting end arc coil is arranged corresponding to the receiving end arc coil.

[0008] The integrated resonant compensation inductor is arranged on the transmitting end arc coil or the receiving end arc coil, or is arranged on the transmitting end arc coil and the receiving end arc coil respectively; the layout of the integrated resonant compensation inductor and the corresponding transmitting end arc coil or receiving end arc coil makes the current direction of the integrated resonant compensation inductor and the transmitting coil or receiving coil perpendicular to each other;

[0009] At most one integrated resonant compensation inductor is arranged on each transmitting coil or each receiving coil.

[0010] The present invention also provides a method for optimizing parameters of an arc-shaped magnetic integrated coupler for a wireless energy supply system, which optimizes parameters of the arc-shaped magnetic integrated coupler for a wireless energy supply system; the method comprises:

[0011] The output power of the wireless energy supply system, the transmission efficiency of the coupler, the mutual inductance between the integrated resonant compensation inductor and the arc coil at the transmitting end or the arc coil at the receiving end, and the mutual inductance between different integrated resonant compensation inductors are taken as objective functions. Combined with the constraints of various parameters, the artificial butterfly optimization algorithm is used to globally optimize the objective function, and the geometric parameters of the coupler and the relative position of the integrated resonant compensation inductor and the arc coil at the transmitting end or the arc coil at the receiving end are determined, so that the integrated resonant compensation inductor and the arc coil at the transmitting end or the arc coil at the receiving end, as well as different integrated resonant compensation inductors are decoupled from each other.

[0012] Beneficial effects of the invention: The invention provides an arc-shaped magnetic integrated coupler and performs multi-objective optimization of parameters, thereby improving the power density and transmission efficiency of the wireless power transmission system, and providing a systematic optimization direction for parameter design, which can be applied to any high-order multi-coil wireless power transmission system.

[0013] The arc-shaped magnetic integrated coupler designed in the present invention is designed to reduce the volume of magnetic coupling. The integrated resonant compensation inductor coil and the arc-shaped coil are reasonably arranged so that the current directions in the two coupling coils are approximately perpendicular to avoid the proximity effect between high-frequency currents. The orthogonal decoupling principle of magnetic flux is used to approximately decouple the compensation inductor from the power transmission coil and the compensation inductor from each other, thereby constructing a quasi-decoupled arc-shaped magnetic integrated coupler.

[0014] The arc-shaped magnetic integrated coupler designed by the present invention can effectively suppress the proximity effect of spatial leakage flux and high-frequency current, and also has the advantages of reducing magnetic core loss and not increasing the space occupied by the magnetic coupler; the artificial butterfly optimization algorithm used in the parameter optimization of the present invention is simple to operate, has strong global search capability and high search efficiency, has the ability to handle complex multi-objective optimization problems, and is suitable for a variety of quasi-decoupled arc-shaped magnetic integrated couplers; the coupler after the resonant compensation inductor is integrated will not have an adverse effect on the stability of the system. And the geometric parameter design of the magnetic integrated coupler using an intelligent optimization algorithm can achieve decoupling between the resonant inductor and the main power transmission coil and decoupling between the resonant inductors. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a form of a single-transmitter-single-receiver resonant inductor type arc-shaped magnetic integrated coupler; in the figure, C represents an integrated resonant compensation inductor coil;

[0016] Figure 2 It is a structural schematic diagram of another form of a single-transmitter-single-receiver resonant inductor type arc-shaped magnetic integrated coupler;

[0017] Figure 3 It is a structural schematic diagram of a form of a dual-transmitting-single-receiving resonant inductive arc-shaped magnetic integrated coupler;

[0018] Figure 4 It is a structural schematic diagram of another form of a dual-transmitter-single-receiver resonant inductive arc-shaped magnetic integrated coupler;

[0019] Figure 5 It is a structural schematic diagram of a form of a single-transmitting-dual-receiving resonant inductive arc-shaped magnetic integrated coupler;

[0020] Figure 6 It is a structural schematic diagram of another form of a single-transmitting-dual-receiving resonant inductive arc-shaped magnetic integrated coupler;

[0021] Figure 7 It is a schematic diagram of the structure of a dual-transmitting-dual-receiving resonant inductive arc-shaped magnetic integrated coupler;

[0022] Figure 8 It is a schematic diagram of the structure of a double-transmitting resonant inductive arc-shaped magnetic integrated coupler;

[0023] Fig. 9 It is a schematic diagram of the structure of a dual-receiving resonant inductive arc-shaped magnetic integrated coupler;

[0024] Fig.10 This is a main circuit topology diagram of a bidirectional composite wireless power transmission system based on the arc-shaped magnetic integrated coupler of the present invention; ab Represents the voltage between point a and point b, that is, the inverter output voltage of the system; U cd represents the voltage between point c and point d;

[0025] Fig.11 for Fig.10 The inverter output voltage of the system shown U ab , output current i ab Waveform graph;

[0026] Fig.12 For the corresponding Fig.11 The system output voltage u O , System output current i O Waveform graph. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0030] Specific implementation method 1. Combination Figures 1 to 9 As shown, the first aspect of the present invention provides an arc-shaped magnetic integrated coupler for a wireless energy supply system, comprising a first transmitting coil P1, a second transmitting coil P2, a first receiving coil S1, a second receiving coil S2 and at least two and no more than four integrated resonant compensation inductor coils,

[0031] The first transmitting coil P1, the second transmitting coil P2, the first receiving coil S1 and the second receiving coil S2 are arc coils with the same structure. The inner ends of the first transmitting coil P1 and the second transmitting coil P2 are arranged relative to each other to form a transmitting end arc coil, and the inner ends of the first receiving coil S1 and the second receiving coil S2 are arranged relative to each other to form a receiving end arc coil. The transmitting end arc coil is arranged corresponding to the receiving end arc coil.

[0032] The integrated resonant compensation inductor is arranged on the transmitting end arc coil or the receiving end arc coil, or is arranged on the transmitting end arc coil and the receiving end arc coil respectively; the layout of the integrated resonant compensation inductor and the corresponding transmitting end arc coil or receiving end arc coil makes the current direction of the integrated resonant compensation inductor and the transmitting coil or receiving coil perpendicular to each other;

[0033] At most one integrated resonant compensation inductor is arranged on each transmitting coil or each receiving coil.

[0034] As an example, combining Figures 1 to 9 As shown, according to the number of integrated resonant compensation inductor coils and the arrangement on the transmitting end arc coil or the receiving end arc coil, the types of integrated resonant compensation inductor coils are divided into single transmitting-single receiving resonant inductor type, dual transmitting-single receiving resonant inductor type, single transmitting-dual receiving resonant inductor type, dual transmitting-dual receiving resonant inductor type, dual transmitting resonant inductor type and dual receiving resonant inductor type;

[0035] The single transmitter includes a transmitter-end integrated resonant compensation inductor coil, and the dual transmitter includes two transmitter-end integrated resonant compensation inductor coils; the single receiver includes a receiver-end integrated resonant compensation inductor coil, and the dual receiver includes two receiver-end integrated resonant compensation inductor coils.

[0036] As an example, the integrated resonant compensation inductor includes a transmitting end integrated resonant compensation inductor and a receiving end integrated resonant compensation inductor.

[0037] The transmitting end integrated resonant compensation inductor coil is arranged on the transmitting end arc coil, and the receiving end integrated resonant compensation inductor coil is arranged on the receiving end arc coil.

[0038] As an example, the integrated resonant compensation inductor includes two transmitting-end integrated resonant compensation inductors or two receiving-end integrated resonant compensation inductors.

[0039] Two transmitting-end integrated resonant compensation inductor coils are arranged on the transmitting-end arc coil; and two receiving-end integrated resonant compensation inductor coils are arranged on the receiving-end arc coil.

[0040] Furthermore, this embodiment also includes a magnetic isolation sheet,

[0041] The lower surface of the arc coil at the transmitting end and the upper surface of the arc coil at the receiving end are respectively covered with a magnetic isolation sheet.

[0042] Specific implementation method 2: Another aspect of the present invention further provides a method for optimizing parameters of an arc-shaped magnetic integrated coupler for a wireless energy supply system, which optimizes the parameters of the arc-shaped magnetic integrated coupler for a wireless energy supply system described in specific implementation method 1; comprising:

[0043] The output power of the wireless energy supply system, the transmission efficiency of the coupler, the mutual inductance between the integrated resonant compensation inductor and the arc coil at the transmitting end or the arc coil at the receiving end, and the mutual inductance between different integrated resonant compensation inductors are taken as objective functions. Combined with the constraints of various parameters, the artificial butterfly optimization algorithm is used to globally optimize the objective function, and the geometric parameters of the coupler and the relative position of the integrated resonant compensation inductor and the arc coil at the transmitting end or the arc coil at the receiving end are determined, so that the integrated resonant compensation inductor and the arc coil at the transmitting end or the arc coil at the receiving end, as well as different integrated resonant compensation inductors are decoupled from each other.

[0044] The wireless power transmission system is a high-order coupling system. The magnetic coupler involves many parameters and performance indicators, and the calculation formula is complicated. It is difficult to obtain the global optimal solution with the existing parameter design method. In this embodiment, the coupler parameters are globally optimized based on the artificial butterfly optimization algorithm. Before performing parameter optimization, a nonlinear programming model of the system needs to be established. The three objective functions of the system's output power, the transmission efficiency of the coupler, and the coupling coefficient between the coupler's resonant inductance and the power transmission coil and the resonant inductance are mainly considered, and the magnetic coupler geometric parameters are combined with the system parameters.

[0045] Furthermore, each parameter constraint condition includes a rated value constraint, a coil parameter constraint, an anti-offset constraint and a quality factor constraint.

[0046] Consider the constraints, mainly including that the resonant inductance and power transmission coil must be less than the rated value; the actual coil size radius, number of turns, and transmission distance have limitations in different wireless power supply fields, and the actual variables have their own upper and lower limits; the anti-offset range meets the actual engineering needs; the quality factor is constrained, and the quality factor needs to have an upper limit value; the system is in a zero phase angle input state as much as possible.

[0047] Eliminating non-independent variables by using equality constraints not only reduces the number of constraints but also simplifies the number of variables.

[0048] In this implementation, the artificial butterfly optimization algorithm is initialized using Cubic mapping.

[0049] The artificial butterfly optimization algorithm is used to optimize the quasi-decoupled arc-shaped magnetic integrated coupler. The butterfly algorithm is initialized by adding Cubic mapping to improve the diversity of the initialization population position. A nonlinear inertia weight coefficient is added to improve the optimization accuracy and convergence speed of the algorithm. The Cauchy mutation is introduced to prevent the algorithm from falling into a local optimal solution, thereby improving the global search capability of the algorithm and enhancing the search space.

[0050] According to the electrical equipment, the system output power P out The mutual inductance between coils is affected by factors such as the number of coil turns and the distance between coils, and must conform to the actual application of the system, thus determining P out 、M RP 、M RR The core of the optimization method is to use the artificial butterfly optimization algorithm to find a set of optimal parameters of the magnetic integrated coupler that meet the constraints and can achieve approximate decoupling between the resonant inductors and between the resonant inductors and the power transmission coil.

[0051] The objective function includes:

[0052] ,

[0053] ,

[0054] ,

[0055] The constraints include:

[0056] ,

[0057] In the formula Indicates the minimum, represents the constraints, represents the output power objective function of the wireless energy supply system, Indicates the output power of the wireless energy supply system, represents the coupler transmission efficiency objective function, is the coupler output power, is the coupler input power, The objective function representing the mutual inductance between the integrated resonant compensation inductor and the transmitting arc coil or the receiving arc coil and the mutual inductance between different integrated resonant compensation inductors, It represents the mutual inductance between the integrated resonant compensation inductor and the transmitting arc coil or the receiving arc coil. Represents the mutual inductance between different integrated resonant compensation inductors, represents the transmitting coil current, Indicates the peak current allowed to flow through the transmitting coil. represents the receiving coil current, Indicates the peak current allowed to flow through the receiving coil. represents the integrated resonant compensation inductor current, Indicates the peak current allowed to flow through the integrated resonant compensation inductor. represents the arc length of the transmitting coil, Indicates the maximum peripheral length of the load, represents the arc length of the receiving coil, Indicates the arc length of the integrated resonant compensation inductor coil, Indicates the minimum output power of the system. Indicates the maximum output power of the system. represents the system input phase angle, represents the load quality factor, represents the quality factor of the arc coil at the transmitting end, represents the minimum value of the quality factor, Indicates the maximum value of quality factor;

[0058] The transmission efficiency of the coupler is expressed as :

[0059] .

[0060] Going further, the optimization process of the objective function includes:

[0061] Set the initial optimization parameter values ​​that meet the constraints, including the arc length l of the transmitting coil P , transmitting coil width w P , Transmitting coil turns N P , receiving coil arc length l S , receiving coil width w S 、Number of turns of receiving coil S 、Integrated resonant compensation inductor coil arc length l C , integrated resonant compensation inductor coil width w C 、N turns of integrated resonant compensation inductor C and the relative position W between the integrated resonant compensation inductor and the transmitting end arc coil or the receiving end arc coil;

[0062] Perform a global search: Based on the current optimization parameter values, according to the objective function , and Plan the butterfly algorithm path;

[0063] The first path node in the butterfly algorithm path is selected, and the current optimization parameter value is optimized according to the nonlinear inertia weight coefficient to obtain the first optimization result; the excellent butterfly individuals in the first half of the first optimization result are selected as the next path node, and the first optimization result is locally searched and iteratively updated until the maximum number of local iterations is reached to obtain the second optimization result; the second optimization result is sorted by using Cauchy mutation to obtain the updated current optimization parameter value;

[0064] If the updated current optimization parameter value meets the preset threshold, it is output as the optimal solution and the optimization is completed; otherwise, the updated current optimization parameter is used as the current optimization parameter value and the next global search is performed until the optimal solution is obtained.

[0065] Example

[0066] The arc-shaped magnetic integrated coupler and parameter optimization method proposed in the present invention are applied to a bidirectional composite wireless power transmission system based on series input and parallel output to illustrate the feasibility and advantages of the present invention.

[0067] Combination Fig.10 As shown, the bidirectional composite wireless power transmission system consists of a DC voltage source, a high-frequency full-bridge inverter circuit, a transmitter compensation network, a coupling mechanism, a receiver compensation network and a rectifier circuit.

[0068] In the figure LP0 is the current flowing through the compensation inductor L P0 The current, L P0 The inductance of the integrated resonant compensation inductor corresponding to the transmitting end; i LP1 is the current flowing through the first transmitting coil P1, L P1 is the inductance corresponding to the first transmitting coil P1; i LP2 is the current flowing through the second transmitting coil P2, L P2 is the inductance corresponding to the first transmitting coil P2; i LS1 is the current flowing through the first receiving coil S1, L S1 is the inductance corresponding to the first receiving coil S1, i LS0 is the current flowing through the compensation inductor L S0 The current, L S0 The inductance of the integrated resonant compensation inductor corresponding to the receiving end; i LS2 is the current flowing through the second receiving coil S2, L S2 is the inductance corresponding to the second receiving coil S2, i CS0 For flow through C S0 Current, M P1S1 is the mutual inductance between the first transmitting coil P1 and the first receiving coil S1, M P1S2 is the mutual inductance between the first transmitting coil P1 and the second receiving coil S2, M P1P2is the mutual inductance between the first transmitting coil P1 and the second transmitting coil P2, M P2S2 is the mutual inductance between the second transmitting coil P2 and the second receiving coil S2, M P2S1 is the mutual inductance between the second transmitting coil P2 and the first receiving coil S1, M S1S2 is the mutual inductance between the first receiving coil S1 and the second receiving coil S2. O is the system output current, u O is the system output voltage;

[0069] DC power supply U in The positive electrode and the negative electrode of are connected to the drain of the switch S1 and the source of the switch S2 respectively.

[0070] The high-frequency full-bridge inverter circuit includes four switches, the source of switch S1 is connected to the drain of switch S2, the source of switch S3 is connected to the drain of switch S4, the source of switch S1 is connected to the source of switch S3, and the drain of switch S2 is connected to the drain of switch S4.

[0071] The transmitter compensation network includes the compensation inductor L P0 , resonant compensation capacitor C P0 , resonant compensation capacitor C P1 , resonant compensation capacitor C P2 . Resonance compensation capacitor C P0 The positive electrode and the compensation inductor L P0 One end of the resonant compensation capacitor C P1 The positive pole is connected to compensate the inductance L P0 The other end is connected to the drain of switch S2, and the resonant compensation capacitor C P0 The negative electrode and the resonant compensation capacitor C P2 The positive pole is connected to the resonant compensation capacitor C P1 The negative electrode is connected to one end of the first transmitting coil P1, and the other end of the first transmitting coil P1 is connected to the resonant compensation capacitor C P0 The negative pole of the resonant compensation capacitor C P2 The negative electrode of is connected to one end of the second transmitting coil P2, and the other end of the second transmitting coil P2 is connected to the drain of the switch S4.

[0072] The coupling mechanism includes a transmitting coil P1, a transmitting coil P2, a receiving coil S1 and a receiving coil S2.

[0073] The receiving end compensation network includes the compensation inductor L S0 , resonant compensation capacitor C S0 , resonant compensation capacitor C S1 , resonant compensation capacitor C S2 . Resonance compensation capacitor C S0 The positive electrode and the compensation inductor L S0 One end of the resonant compensation capacitor CS2 The positive pole is connected to compensate the inductance L S0 The other end of the resonant compensation capacitor C S1 The positive pole is connected to the resonant compensation capacitor C S2 The negative electrode is connected to one end of the second receiving coil S2, and the other end of the second receiving coil S2 is connected to the resonant compensation capacitor C S0 The negative pole of the resonant compensation capacitor C S1 The negative pole is connected to the first receiving coil S1.

[0074] The rectifier circuit includes four switches, the source of switch S5 is connected to the drain of switch S6, the source of switch S7 is connected to the drain of switch S8, the drain of switch S5 is connected to the drain of switch S7, and the source of switch S6 is connected to the source of switch S8. The positive and negative electrodes of the output electrolytic capacitor C0 are connected to the positive and negative ends of the load resistor respectively.

[0075] Design the arc-shaped magnetic integrated coupler. First, set the initial conditions, including the operating frequency f s =85kHz, the outer arc length of the coupler coil is 300mm, the outer width is 200mm, the length and width of the ferrite magnetic isolation sheet are consistent with the outer dimensions of the coil, the model of the Litz wire is 0.1×700 strands, and the wire diameter is d w =3.85mm; then initialize the parameters, plan the butterfly algorithm path according to the objective function and constraints; finally, under the condition that the transmitting coil and the receiving coil are facing each other, iterate and sort, and select the target value that meets the requirements as the optimal parameter. From the magnetic flux vector distribution and magnetic field distribution of the arc-shaped magnetic integrated coupler, it can be seen that the magnetic field is mainly distributed near the coupler and concentrated around the resonant inductor coil, which can effectively reduce the leakage magnetic field.

[0076] Verification experiment: To verify the effectiveness of the embodiment, a simulation model was built by software for verification and analysis, and the optimal parameters obtained by the artificial butterfly optimization algorithm are shown in Table 1. The system power level is 1kW and the operating frequency is 85kHz.

[0077] Table 1 Optimized coupler parameters

[0078]

[0079] Combination Fig.11 and Fig.12 It can be seen that the system can achieve constant power output and meet the constraints and objective functions. The output power fluctuation is within the ideal range and zero phase angle input is achieved.

[0080] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. An arc-shaped magnetic integrated coupler for a wireless energy supply system, characterized in that: The invention comprises a first transmitting coil P1, a second transmitting coil P2, a first receiving coil S1, a second receiving coil S2 and at least two and no more than four integrated resonant compensation inductor coils, The first transmitting coil P1, the second transmitting coil P2, the first receiving coil S1 and the second receiving coil S2 are arc coils with the same structure. The inner ends of the first transmitting coil P1 and the second transmitting coil P2 are arranged relative to each other to form a transmitting end arc coil, and the inner ends of the first receiving coil S1 and the second receiving coil S2 are arranged relative to each other to form a receiving end arc coil. The arc coil at the transmitting end is arranged correspondingly to the arc coil at the receiving end; The integrated resonant compensation inductor is arranged on the transmitting end arc coil or the receiving end arc coil, or is arranged on the transmitting end arc coil and the receiving end arc coil respectively; the layout of the integrated resonant compensation inductor and the corresponding transmitting end arc coil or receiving end arc coil makes the current direction of the integrated resonant compensation inductor and the transmitting coil or receiving coil perpendicular to each other; At most one integrated resonant compensation inductor is arranged on each transmitting coil or each receiving coil.

2. The arc-shaped magnetic integrated coupler for a wireless energy supply system according to claim 1, characterized in that: According to the number of integrated resonant compensation inductor coils and the settings on the transmitting end arc coil or the receiving end arc coil, the types of integrated resonant compensation inductor coils are divided into single transmitting-single receiving resonant inductor type, dual transmitting-single receiving resonant inductor type, single transmitting-dual receiving resonant inductor type, dual transmitting-dual receiving resonant inductor type, dual transmitting resonant inductor type and dual receiving resonant inductor type; The single transmitter includes a transmitter-end integrated resonant compensation inductor coil, and the dual transmitter includes two transmitter-end integrated resonant compensation inductor coils; the single receiver includes a receiver-end integrated resonant compensation inductor coil, and the dual receiver includes two receiver-end integrated resonant compensation inductor coils.

3. The arc-shaped magnetic integrated coupler for a wireless energy supply system according to claim 2, characterized in that: The integrated resonant compensation inductor comprises a transmitting end integrated resonant compensation inductor and a receiving end integrated resonant compensation inductor. The transmitting end integrated resonant compensation inductor coil is arranged on the transmitting end arc coil, and the receiving end integrated resonant compensation inductor coil is arranged on the receiving end arc coil.

4. The arc-shaped magnetic integrated coupler for a wireless energy supply system according to claim 2, characterized in that: The integrated resonant compensation inductor includes two transmitting-end integrated resonant compensation inductors or two receiving-end integrated resonant compensation inductors. Two transmitting-end integrated resonant compensation inductor coils are arranged on the transmitting-end arc coil; and two receiving-end integrated resonant compensation inductor coils are arranged on the receiving-end arc coil.

5. The arc-shaped magnetic integrated coupler for a wireless energy supply system according to any one of claims 1 to 4, characterized in that: It also includes magnetic isolation sheets, The lower surface of the arc coil at the transmitting end and the upper surface of the arc coil at the receiving end are respectively covered with a magnetic isolation sheet.

6. A method for optimizing parameters of an arc-shaped magnetic integrated coupler for a wireless energy supply system, wherein the method optimizes parameters of the arc-shaped magnetic integrated coupler for a wireless energy supply system according to claim 1; characterized in that: include: The output power of the wireless energy supply system, the transmission efficiency of the coupler, the mutual inductance between the integrated resonant compensation inductor and the arc coil at the transmitting end or the arc coil at the receiving end, and the mutual inductance between different integrated resonant compensation inductors are taken as the objective function. Combined with the constraints of various parameters, the artificial butterfly optimization algorithm is used to globally optimize the objective function, and the geometric parameters of the coupler and the relative position of the integrated resonant compensation inductor and the arc coil at the transmitting end or the arc coil at the receiving end are determined, so that the integrated resonant compensation inductor and the arc coil at the transmitting end or the arc coil at the receiving end, as well as the different integrated resonant compensation inductors are decoupled from each other. Each parameter constraint condition includes rated value constraint, coil parameter constraint, anti-offset constraint and quality factor constraint; The artificial butterfly optimization algorithm is initialized using Cubic mapping; The objective function includes: min:f1=-P out , f3=M RP =M RR ≈0, The constraints include: s.t. Where min represents the minimum, st represents the constraint condition, f1 represents the output power objective function of the wireless energy supply system, P out represents the output power of the wireless energy supply system, f2 represents the transmission efficiency objective function of the coupler, P out-coupler Represents the coupler output power, P in-coupler represents the coupler input power, f3 represents the mutual inductance between the integrated resonant compensation inductor and the transmitting end arc coil or the receiving end arc coil and the mutual inductance between different integrated resonant compensation inductors, M RP M represents the mutual inductance between the integrated resonant compensation inductor and the transmitting arc coil or the receiving arc coil. RR Represents the mutual inductance between different integrated resonant compensation inductors, I LP Represents the transmitting coil current, I LPmax Indicates the peak current allowed to flow through the transmitting coil, I LS Represents the receiving coil current, I LSmax Indicates the peak current allowed to flow through the receiving coil, I LC Represents the integrated resonant compensation inductor current, I LCmax It represents the peak current allowed to flow through the integrated resonant compensation inductor, l P represents the arc length of the transmitting coil, l max Indicates the maximum peripheral length of the load, l S represents the arc length of the receiving coil, l C Indicates the arc length of the integrated resonant compensation inductor, P outmin Indicates the minimum output power of the system, P outmax Indicates the maximum output power of the system, Z input Indicates the system input phase angle, Q L Indicates the load quality factor, Q P Indicates the quality factor of the arc coil at the transmitting end, Q min Indicates the minimum value of the quality factor, Q max Indicates the maximum value of quality factor; The transmission efficiency of the coupler is expressed as η coupler : The optimization process of the objective function includes: Set the initial optimization parameter values ​​that meet the constraints, including the arc length l of the transmitting coil P , transmitting coil width w P , Transmitting coil turns N P , receiving coil arc length l S , receiving coil width w S 、Number of turns of receiving coil S 、Integrated resonant compensation inductor coil arc length l C , integrated resonant compensation inductor coil width w C 、N turns of integrated resonant compensation inductor C and the relative position W between the integrated resonant compensation inductor and the transmitting end arc coil or the receiving end arc coil; Perform global search: Based on the current optimization parameter values, plan the butterfly algorithm path according to the objective functions f1, f2 and f3; The first path node in the butterfly algorithm path is selected, and the current optimization parameter value is optimized according to the nonlinear inertia weight coefficient to obtain the first optimization result; the excellent butterfly individuals in the first half of the first optimization result are selected as the next path node, and the first optimization result is locally searched and iteratively updated until the maximum number of local iterations is reached to obtain the second optimization result; the second optimization result is sorted by using Cauchy mutation to obtain the updated current optimization parameter value; If the updated current optimization parameter value meets the preset threshold, it is output as the optimal solution and the optimization is completed; otherwise, the updated current optimization parameter is used as the current optimization parameter value and the next global search is performed until the optimal solution is obtained.

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