Large-spacing anti-offset segmented magnetic coupler, system and optimization method

Abstract

The invention discloses a large-spacing anti-offset sectional type magnetic coupler, a dynamic wireless power transmission system and an optimization method, and the magnetic coupler comprises a plurality of RDSSP transmitting pads, each RDSSP transmitting pad comprises a rectangular coil LTR and a double-spiral series coil LTS formed by connecting two same spiral coils in series, two spiral coils of the double-spiral series coil are symmetrically designed about the Y axis; the multiple RDSSP transmitting pads are sequentially arranged along the X axis, and if the double-helix series coils in the RDSSP transmitting pads at the odd number positions are wound anticlockwise, the double-helix series coils in the RDSSP transmitting pads at the even number positions are wound clockwise; wherein the distance between adjacent RDSSP transmitting pads is greater than the size of a single transmitting pad; and the receiving end comprises a secondary side rectangular coil LR. According to the magnetic coupler provided by the invention, the distance between the adjacent transmitting pads can be larger than the size of a single transmitting pad, and compared with an existing distance-free continuously-designed sectional transmitting terminal, the magnetic coupler can save half of copper wires and magnetic cores.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless power transmission, and in particular to a large-spacing anti-offset segmented magnetic coupler, a dynamic wireless power transmission system and an optimization method. Background Art

[0002] Dynamic Wireless Power Transfer (DWPT) technology is an effective solution to address range anxiety in mobile vehicles powered by power batteries, such as electric vehicles and AGVs, or to eliminate the need to carry large, heavy batteries. In a dynamic WPT system, the segmented design can effectively improve the system's coupling performance and transmission efficiency, and reduce magnetic field exposure, compared to the long guide rail design. However, segmented transmitters generally have the contradiction of small array spacing between adjacent transmitting pads, resulting in large cross-coupling effects but small power fluctuations, and large array spacing resulting in large power fluctuations but small cross-coupling effects. Therefore, how to achieve large array spacing design between adjacent transmitting pads while taking into account power fluctuation suppression is a key challenge in the development and application of dynamic WPT technology. Summary of the Invention

[0003] In order to solve at least one of the technical problems existing in the prior art to a certain extent, the present invention aims to provide a large-spacing anti-offset segmented magnetic coupler, a dynamic wireless power transmission system and an optimization method.

[0004] The first technical solution adopted by the present invention is:

[0005] A large-pitch anti-offset segmented magnetic coupler, comprising:

[0006] Multiple RDSSP launch pads, each RDSSP launch pad includes a rectangular coil L TR and a double helical series coil L consisting of two identical helical coils in series TS The two spiral coils of the double spiral series coil are designed symmetrically about the Y axis to ensure magnetic decoupling between the double spiral series coil and the rectangular coil in the RDSSP launch pad; multiple RDSSP launch pads are arranged in sequence along the X axis. If the double spiral series coils in the RDSSP launch pads at odd positions are wound counterclockwise, then the double spiral series coils in the RDSSP launch pads at even positions are wound clockwise; wherein the spacing between adjacent RDSSP launch pads is greater than the size of a single launch pad;

[0007] The receiving end includes the secondary rectangular coil L R .

[0008] Furthermore, the RDSSP transmitting pad further includes a primary magnetic core plate, and the receiving end further includes a secondary magnetic core plate; the four sides of the rectangular coil LTR match the edges of the primary magnetic core plate;

[0009] The rectangular coil L TR and the secondary rectangular coil L R The dimensions and structural parameters are the same.

[0010] Furthermore, the double helix series coils should all be wound on the primary magnetic core plate, and the number of turns N of the double helix series coils should be TSS , the distance l between the two symmetrical spiral coils ss and the primary core length l of the RDSSP launch pad TF The following relationship should be satisfied:

[0011] 2N TSS d C +l SS ≤l TF

[0012] Where, d c is the diameter of the Litz wire.

[0013] The second technical solution adopted by the present invention is:

[0014] A dynamic wireless power transmission system comprises the above-mentioned large-spacing anti-offset segmented magnetic coupler, a parallel inverter circuit, a primary-side compensation circuit, a rectifier circuit and a secondary-side compensation circuit.

[0015] The third technical solution adopted by the present invention is:

[0016] A wide-spacing segmented dynamic transmitter optimization method includes the following steps:

[0017] Construct an equivalent circuit model of a dynamic WPT system with widely spaced segmented transmitters based on RDSSP;

[0018] According to the constructed equivalent circuit model, the total equivalent mutual inductance M of the rectangular coil, double spiral series coil and secondary rectangular coil is obtained. TR -R and M TSS -R, calculate the output voltage V of the dynamic WPT system O and volatility factor γ;

[0019] The total mutual inductance M TR-R As the reference amount to be compensated, the spacing between adjacent RDSSP launch pads is l dis The optimization problem is transformed into optimizing the distance l between the double helical series coils. ss and number of turns N TSS question;

[0020] After the optimization is completed, the optimal distance l is output ss , number of turns N TSS and spacing l dis .

[0021] Furthermore, the output voltage V O The calculation formula is:

[0022]

[0023] Where, ω = 2πf, f is the operating frequency of the system; τ is the square of the ratio of the compensation capacitors C2 and C1; C1 is the compensation capacitor; V DC is the input voltage of the DC drive power supply;

[0024] Among them, the output voltage fluctuation of the dynamic WPT system depends on the equivalent mutual inductance M eq , which is expressed as follows:

[0025]

[0026] Output voltage V O The volatility factor is defined as follows:

[0027]

[0028] Where M eq | Max and M eq | Min M is the equivalent mutual inductance when the secondary rectangular coil moves along the direction of motion eq The maximum and minimum values ​​of .

[0029] Furthermore, the wide spacing optimization problem is converted into a problem of optimizing the design of double helical series coils, including:

[0030] By optimizing the number of turns N of the double helix series coil in the RDSSP launch pad TSS The design distance l between the two symmetrical spiral coils ss , in order to realize the wide array spacing design of adjacent RDSSP transmitting pads in the segmented transmitter while suppressing power fluctuations;

[0031] When the number of turns N TSS When the output voltage V O The minimum volatility factor γ| min With the design distance l ss The increase of the first decreases and then increases, which shows that at a fixed number of turns N TSS There exists an optimal l ss Design, defined as l ss,opt ; At the optimal design distance l ss Under this condition, there is an optimal number of turns N TSS,opt Based on this, in the process of optimizing the design, the number of turns N of the double helix series coil is kept TSS Get the optimal design distance l under the same conditions ss, then at the optimal design distance l ss Redesign the number of turns N under the conditions TSS .

[0032] Furthermore, the optimization design process is as follows:

[0033] When l ss <l ss,opt When , the minimum fluctuation factor γ| min With the number of turns N TSS decreases with the increase of ss If it is not enough, increase the number of turns N TSS Can effectively improve the stability of the system output voltage;

[0034] When l ss >l ss,opt When , the minimum fluctuation factor γ| min With the number of turns N TSS increases with the increase of the number of turns N. TSS increases and decreases, and τ is less than 0; this indicates that at the design distance l ss When sufficient, increasing the number of turns of the double helix series coil will increase the total mutual inductance M TSS-R Transition compensation M TR-R , which results in redundant energy transmission of the double helix series coils, causing excessive use of Litz wire and increasing costs;

[0035] When l ss ≈l ss,opt When , the minimum fluctuation factor γ| min With the number of turns N TSS The increase of τ first decreases and then increases. At the same time, τ increases with the number of turns N. TSS Increase and decrease.

[0036] Furthermore, the optimal design distance l ss Redesign the number of turns N under the conditions TSS ,include:

[0037] The output voltage V of the dynamic wireless power transmission system is calculated based on MATLAB O The relationship between the fluctuation factor γ and τ; where τ is the square of the ratio of the compensation capacitors C2 and C1;

[0038] Use parameter sweep method to obtain the optimal design distance l ss,opt The minimum volatility factor γ under Min , that is, l ss =l ss,opt The corresponding fluctuation factor γ| Min smallest;

[0039] To obtain the optimal design distance l ss,optNext, the parameter sweep method is used again to calculate the number of turns N of the double helix series coil. TSS Perform optimal design to obtain the optimal design distance l ss,opt and the optimal number of turns N TSS,opt Minimum fluctuation factor γ under design | Min,opt , further improving the ability to suppress power fluctuations.

[0040] Furthermore, after the optimization is completed, the optimal distance l is output. ss , number of turns N TSS and spacing l dis ,include:

[0041] Judgment γ| Min,opt Is it less than or equal to the preset volatility factor range γ| Target If so, analyze the cross-coupling M between the double-helix series coils in adjacent RDSSP launch pads. TSS1-TSS2 Otherwise, reduce the spacing l according to the preset method dis , return to the optimized design of the distance l of the double helix series coil ss and number of turns N TSS ;

[0042] If the cross coupling M TSS1-TSS2 Meet the preset requirements and output the optimal distance l ss , number of turns N TSS and spacing l dis Otherwise, increase the spacing l according to the preset method dis , return to the optimized design of the distance l of the double helix series coil ss and number of turns N TSS .

[0043] The beneficial effects of the present invention are as follows: the magnetic coupler provided by the present invention can make the spacing between adjacent transmitting pads larger than the size of a single transmitting pad, which can save half the amount of copper wire and magnetic core compared to the existing segmented transmitting end with a continuous design without spacing. In addition, the magnetic coupler achieves outstanding power fluctuation suppression capabilities based on the principle of magnetic field complementarity, while the large spacing effectively eliminates the impact of cross-coupling of adjacent transmitting pads on the system. Therefore, the segmented magnetic coupler effectively solves the contradiction between the common problem of small array spacing between adjacent transmitting pads in dynamic wireless power transmission system, which results in large cross-coupling effects and small power fluctuations, and large array spacing, which results in large power fluctuations and small cross-coupling effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following introduction is made to the drawings of the embodiments of the present invention or the related technical solutions in the prior art. It should be understood that the drawings introduced below are only for the convenience of clearly describing some embodiments of the technical solutions of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative work.

[0045] Figure 1 2 is a schematic structural diagram of a large-pitch anti-offset segmented magnetic coupler according to an embodiment of the present invention;

[0046] Figure 2 This is an equivalent schematic diagram of the dynamic WPT system circuit model in an embodiment of the present invention;

[0047] Figure 3 is the movement process of the secondary rectangle receiving end, and the distance l ss The corresponding total mutual inductance M TR-R With M TSS-R Schematic diagram of;

[0048] Figure 4 When ρ=80%, different number of turns N TSS and design distance l ss The corresponding output voltage V O Schematic diagram of the fluctuation factor γ changing with τ;

[0049] Figure 5 When ρ=100%, different number of turns N TSS and design distance l ss The corresponding output voltage V O Schematic diagram of the fluctuation factor γ changing with τ;

[0050] Figure 6 The adjacent RDSSP launch pads are cross-coupled, and the different number of turns N TSS and design distance l ss The cross-coupling between adjacent RDSSP launch pads is designed to increase with the array spacing l dis Schematic diagram of the changes;

[0051] Figure 7 This is a flow chart for the optimization design of a wide-spacing segmented dynamic transmitter based on the RDSSP transmitter pad;

[0052] Figure 8 It is a schematic diagram of a wide-pitch segmented dynamic magnetic coupler based on RDSSP;

[0053] Figure 9 is the mutual inductance M at different moving positions TR-R With M TSS-R Schematic diagram of the measured values;

[0054] Figure 10 Schematic diagram of the cross-coupling measurements between the double-helix series coils in adjacent Tx RDSSPs when the rectangular receiving end moves to different positions;

[0055] Figure 11 This is the principle diagram of a dynamic WPT system based on RDSSP wide-spaced segmented transmitters;

[0056] Figure 12 It is a schematic diagram of the relationship between the fluctuation factor γ and τ;

[0057] Figure 13 This is a schematic diagram of a 1kW dynamic WPT experimental system platform based on RDSSP with widely spaced segmented transmitters.

[0058] Figure 14 is fully loaded (R L =22.5Ω) when the receiving end is at different moving positions;

[0059] Figure 15 This is the output characteristic waveform of the dynamic WPT system under different loads;

[0060] Figure 16 This is the voltage and current dynamic experimental waveform of the output port of the primary inverter of the dynamic WPT system under full load within the moving range of ΔX∈[0mm 1240mm];

[0061] Figure 17 It is the dynamic experimental waveform of voltage and current at the input and output ports of the secondary rectifier of the dynamic WPT system under full load within the moving range of ΔX∈[0mm 1240mm];

[0062] Figure 18 It is a schematic diagram of the output voltage of the system when the rectangular receiving end moves to different positions along the moving direction;

[0063] Figure 19 It is a schematic diagram of the output power of the system when the rectangular coil at the receiving end moves to different positions along the moving direction. DETAILED DESCRIPTION

[0064] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. For the step numbers in the following embodiments, they are provided only for the convenience of explanation and are not intended to limit the order of the steps. The order of execution of the steps in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0065] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present application. The singular forms of "a", "said", and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. In addition, unless otherwise clearly defined, words such as setting, installing, and connecting should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0066] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0067] In the description of this application, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0068] In the description of this application, "and / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0069] Explanation of terms:

[0070] RDSSP: abbreviation of Rectangular-Double Solenoid Series Pad, rectangular-double helix series coil pad.

[0071] In response to the existing technical problems, the present invention proposes a rectangular-double-helix segmented dynamic transmitter with both wide spacing and dynamic power fluctuation suppression capabilities. This transmitter can make the array spacing between adjacent transmitters larger than the size of a single transmitter pad. Compared with the existing continuous design segmented transmitter without array spacing, it can save more than half of the copper wire and magnetic core usage. At the same time, the large spacing design effectively eliminates the impact of cross-coupling of adjacent transmitters on the system, improving the overall performance and applicability of the system. The dynamic wireless power transmission system based on the large-spacing segmented magnetic coupler effectively solves the contradictory problem that the sub-couplers of the dynamic wireless power transmission system generally have small array spacing between adjacent transmitter pads, large cross-coupling effect and small power fluctuation, and large array spacing and large power fluctuation and small cross-coupling effect. In addition, the system does not require additional gain control strategies, and realizes the discontinuous design and power fluctuation suppression of the segmented transmission track based on the mechanism of magnetic field complementarity.

[0072] The present invention is explained in detail below with reference to the accompanying drawings and specific embodiments.

[0073] (1) Design and operating characteristics of the transmitter of a wide-spacing segmented dynamic wireless power transmission system

[0074] (1.1) Basic structure and design of wide-spacing segmented transmitter

[0075] The larger the spacing between adjacent transmitting pads of the segmented transmitting end, the lower the cost of the system. However, the power fluctuation of the segmented transmitting end is mainly reflected in the transition zone of adjacent transmitting pads, and the power fluctuation is positively correlated with the spacing between the transition zones of adjacent transmitting pads. This embodiment proposes a rectangular-spiral pad alternating design method, which improves the array spacing between adjacent transmitting pads to a certain extent, and at the same time has the ability to suppress the fluctuation of dynamic output power. Based on this, this embodiment further studies the enhancement of the magnetic field complementarity of the transition zone between adjacent transmitting pads of the segmented transmitting end, and proposes a wide-spacing segmented dynamic transmitting end based on a rectangular-double solenoid series pad (Rectangular-Double Solenoid Series Pad, RDSSP). On the basis of ensuring the outstanding power fluctuation suppression characteristics, the array spacing between adjacent transmitting pads of the segmented rail end is further improved, thereby reducing the system design cost and providing the possibility for practical application.

[0076] See also Figure 1 , Figure 1 (a) shows the basic configuration and structure of the wide array spacing segmented dynamic magnetic coupler based on RDSSP launch pad. Figure 1 As shown in (b), a single RDSSP launch pad includes a rectangular coil L TR And two identical spiral coils in series (defined as double spiral series coils) L TSThe left and right spiral coils of the double helix series coil are designed symmetrically about the Y axis, thus ensuring the magnetic decoupling of the double helix series coil and the rectangular coil in the RDSSP launch pad. The secondary side still uses the simplest rectangular coil L R As a rectangular receiving end, such as Figure 1 As shown in (c), the secondary magnetic coupling structure is simplified and lightweight to meet the needs of practical applications. In order to construct the same polarity of the horizontal magnetic field in the transition region of adjacent RDSSP launch pads to superimpose complementary characteristics, an alternating design method is adopted for the wide-spacing segmented dynamic launch short based on the RDSSP launch pad. That is, if the double helix series coils in the RDSSP launch pads at odd positions are wound counterclockwise, then the double helix series coils in the RDSSP launch pads at even positions are wound clockwise, as shown in the figure. Figure 1 In addition, the rectangular coils in the RDSSP launch pad all use the same winding method, as shown in the red arrow in (a). Figure 1 As shown by the blue arrow in (a), a perpendicular magnetic field with the same direction is generated.

[0077] In addition, since the double helix series coil should be wound entirely on the core plate, the number of turns N of the double helix series coil is TSS , the design distance l of its bilaterally symmetrical spiral coil ss and RDSSP launch pad core board length l TF The following relationship should be satisfied:

[0078] 2N TSS d C +l SS ≤l TF (1)

[0079] where d C is the diameter of the Litz wire. In addition, in order to more clearly reflect the array spacing l between adjacent RDSSP launch pads dis The size and design advantages of the array spacing l dis The length of the RDSSP transmitter (in this embodiment, the length of the core plate is l TF ) percentage as a measurement standard, as shown in formula (2). The larger the percentage, the smaller the array spacing l dis The larger it is, the better the design will be and the lower the design cost of the transmitter will be.

[0080]

[0081] (1.2) System Equivalent Model and Output Power Fluctuation Suppression Analysis Based on Wide-Spaced Segmented Transmitters

[0082] Since the rectangular coils and double helix series coils in the RDSSP transmitter pad are independent of each other, all rectangular coils and double helix coils of the wide-pitch segmented transmitter based on RDSSP are driven according to the system construction method. So far, the dynamic WPT system circuit model of the wide-pitch segmented transmitter can be equivalent to the following: Figure 2 shown.

[0083] Without loss of generality, as well as The fundamental wave vectors of the current and voltage in the LCC resonant cavity correspond to each other. eq is the secondary side full bridge rectifier and load resistor R L The relationship between the equivalent AC resistance and fundamental wave parameters is as follows:

[0084]

[0085] Among them, V1, V2 and V R are the corresponding fundamental voltage amplitudes, V DC is the input voltage of the DC drive power supply. V O and I O It is divided into the DC voltage and current after rectification by the full-bridge rectifier on the secondary side of the dynamic WPT system.

[0086] According to Kirchhoff's law and the mutual inductance equivalent model, we can get Figure 2 The loop equation of the equivalent circuit is as follows:

[0087]

[0088] Among them, M TR-R and M TSS-R are the total equivalent mutual inductances of all rectangular coils and double spiral series coils at the wide array spacing segmented transmitter based on RDSSP and the secondary rectangular receiving end, which can be expressed as follows:

[0089]

[0090] In addition, the LCC compensation network components L1 and C1, L2 and C2 and the L in the series resonant circuit on the secondary side R and C R The design is in a completely resonant state, that is, it satisfies the following relationship:

[0091]

[0092] According to equations (6), (8) and the orthogonal driving method, Figure 2 The equivalent dynamic WPT system output voltage V O It can be calculated by formula (9):

[0093]

[0094] Where ω = 2πf, f is the operating frequency of the system, and τ is the square of the ratio of the compensation capacitors C2 and C1, that is,

[0095] According to formula (9), when the operating frequency and input parameters of the system are determined, the output voltage fluctuation of the dynamic WPT system based on the wide-spaced segmented transmitter of RDSSP depends on the equivalent mutual inductance M eq , which is expressed as follows:

[0096]

[0097] Therefore, if the segmented transmitter based on RDSSP is designed with wide spacing and the equivalent mutual inductance is approximately constant, the output voltage V O Will become stable. The system output voltage V O The volatility factor is defined as follows:

[0098]

[0099] Among them, M eq | Max and M eq | Min When the receiving end of the secondary rectangle moves along the direction of motion, M eq The maximum and minimum values ​​of .

[0100] (2) Transmitter optimization method for wide-spacing segmented dynamic wireless power transmission system

[0101] (2.2) Analysis of key parameters affecting the design spacing between adjacent RDSSP launch pads

[0102] In order to optimize the coupling when the RDSSP transmitting pad is completely aligned with the rectangular receiving end, the rectangular coil in the receiving end is designed symmetrically with the rectangular coil in the RDSSP transmitting pad during the optimization design process, that is, the size and structural parameters are designed to be the same. In addition, the total mutual inductance M between the rectangular receiving end and the segmented transmitting end rectangular coil based on RDSSP is calculated. TR-R Based on this, the problem is transformed into optimizing the design of the double spiral series coils in the RDSSP transmitting pad to make the total mutual inductance M TSS-R Effective compensation M TR-R , and then construct an equivalent unchanged M eq, thereby achieving dynamic power fluctuation suppression. According to the design specifications of SAEJ2954WPT1 / Z1, taking into account the actual design complexity and experimental material limitations, the size parameters of the RDSSP transmitting pad and the rectangular receiving end are determined as shown in Table 1. The length and width of the RDSSP transmitting pad and the rectangular receiving end are both designed to be 300mm×300mm, and the energy transmission air gap is designed with 100mm as an example. In addition, studies have shown that the coupling performance of the WPT system magnetic coupler depends on the structure and size of the magnetic coupling mechanism. Therefore, when the size parameters of the magnetic coupler are determined, its coupling performance depends on its own structural parameters, such as the number of turns, turn spacing, position layout, etc. of the coil. In order to simplify the winding difficulty and analysis process of the coil, the turn spacing P of the coil is set. N In summary, the number of turns N of the double helix series coil in the RDSSP launch pad can be optimized. TSS The design distance l between the left and right symmetrical spiral coils ss , in order to realize the wide array spacing design of adjacent RDSSP transmitting pads in the segmented transmitter while suppressing power fluctuations.

[0103] Table 1 Parameters of RDSSP transmitting pad and rectangular receiving end

[0104]

[0105] In order to determine the number of turns N of the double helix series coil in the RDSSP launch pad TSS The design distance l between the left and right symmetrical spiral coils ss The system output fluctuation and the spacing between adjacent RDSSP transmitting pad arrays l dis The influence between them is established based on ANSYS Maxwell Figure 1 The segmented dynamic magnetic coupler structure model is shown (the magnetic coupler size parameters refer to Table 1), and the study is carried out using ρ = 80% and ρ = 100% as examples.

[0106] See also Figure 3 , Figure 3 (a) is a schematic diagram of the rectangular receiving end moving from the state aligned with the Tx1RDSSP transmitting pad to the state aligned with the Tx2RDSSP transmitting pad. Figure 3 (b)-(d) is ρ = 80% (i.e. the array spacing between adjacent RDSSP launch pads l dis =240mm), different number of turns N TSS and different design distances l ss Lower total mutual inductance M TR-R and M TSS-R As the moving position (taking the rectangular receiving end from being aligned with the Tx1RDSSP transmitting pad to being aligned with the Tx2RDSSP transmitting pad as an example, Figure 3The changing characteristics of (a) are shown in Fig. Figure 3 It can be seen that the total mutual inductance M TR-R and M TSS-R Have complementary characteristics. Figure 3 Substituting the mutual inductance data into formula (11) we can get the output voltage V O The relationship between the fluctuation factor γ and the square of the ratio τ of the compensation capacitor C2 and C1 is as follows: Figure 4 As shown. Obviously, the double helix series coils in the RDSSP launch pad have different design distances l ss and different number of turns N TSS Lower system output voltage V O The fluctuation factor γ increases with the square of the ratio τ of the compensation capacitors C2 and C1, showing a trend of first decreasing and then increasing. The τ corresponding to the minimum γ is the design point where the system output fluctuation is minimized. The specific parameters of the minimum fluctuation design point are shown in Table 2.

[0107] Table 2: Different number of turns N when ρ=80% TSS and design distance l ss The corresponding optimal design point

[0108]

[0109] Depend on Figure 4 From Table 2, we can see that when the number of turns N TSS When the system output voltage V O The minimum volatility factor γ| min With the design distance l ss The increase of the first decreases and then increases. This shows that at a fixed number of turns N TSS There exists an optimal l ss Design, defined as l ss,opt In addition, τ increases with the design distance l ss As τ increases, the larger the value, the greater the difference between the compensation capacitors C1 and C2. According to the characteristics of the LCC compensation network, a larger τ may increase the voltage and current stress of the resonant circuit where the double helix series coil is located. ss <l ss,opt When , the minimum fluctuation factor γ| min With the number of turns N TSS decreases with the increase of ss If it is not enough, increase the number of turns N TSS It can effectively improve the stability of the system output voltage; when l ss >l ss,opt When , the minimum fluctuation factor γ| min With the number of turns N TSS increases with the increase of the number of turns N. TSS increases and decreases, and τ is less than 0. This shows that at the design distance lss When sufficient, increasing the number of turns of the double helix series coil will increase the total mutual inductance M TSS-R Transition compensation M TR-R , resulting in redundant energy transmission of the double helix series coil, causing excessive use of Litz wire and increasing costs; when l ss ≈l ss,opt When , the minimum fluctuation factor γ| min With the number of turns N TSS The increase of τ first decreases and then increases. At the same time, τ increases with the number of turns N. TSS This means that at the optimal design distance l ss Under this condition, there is an optimal number of turns N TSS,opt Based on this, the number of turns N of the double helix series coil should be kept constant during the optimization design process. TSS Get the optimal design distance l under the same conditions ss , then at the optimal design distance l ss Redesign the number of turns N under the conditions TSS .

[0110] Similarly, we can get ρ = 100% (i.e. the array distance between adjacent RDSSP launch pads l dis =300mm), the system output voltage V O The relationship between the fluctuation factor γ and the square of the ratio τ of the compensation capacitor C2 and C1 is as follows: Figure 5 The specific parameters of the optimal design point are shown in Table 3. It is worth noting that when l ss =240mm, N TSS The case of 11 and 15 turns exceeds the design boundary of formula (1), so this design does not exist. Figure 5 From Table 3, we can see that when ρ=100%, the design distance l of the double helix series coil is ss and number of turns N TSS The impact on the output characteristics of the dynamic WPT system is similar to that of ρ = 80%. It is further clarified that the number of turns N of the double helix series coil should be kept constant during the optimization design process. TSS Get the optimal design distance l under the same conditions ss , then at the optimal design distance l ss Redesign the number of turns N under the conditions TSS .

[0111] Table 3 ρ=100%, different number of turns N TSS and different design distances l ss The corresponding optimal design point

[0112]

[0113] According to Table 2 and Table 3, as the array spacing l of adjacent RDSSP launch pads increases,dis Increase the optimal design distance l between the double helix series coils ss,opt This indicates that increasing the array spacing l between adjacent RDSSP launch pads dis The design distance l of the double helix series coil needs to be increased ss Compensation is performed by increasing l ss The magnetic field of the double helix series coil can be made within the array spacing l dis The coverage distance in the corresponding interval increases, thereby maintaining an effective and stable complementary coupling magnetic field. In addition, as l ss As the power fluctuation suppression capability of the dynamic WPT system under the optimal design increases, it also increases accordingly. This makes it possible to achieve a wide array spacing design while suppressing the output power fluctuation of the dynamic WPT system.

[0114] In addition, for the segmented dynamic transmitter, the cross-coupling between adjacent transmitting pads will affect the resonant state of the system, thereby changing the output characteristics of the system and reducing the transmission efficiency. Therefore, in order to reduce the cross-coupling between adjacent RDSSP transmitting pads, the number of turns N of the double helix series coil is analyzed. TSS Distance from design ss Impact on system cross-coupling. Figure 6 (a) is the definition of cross-coupling between adjacent RDSSP launch pads, including the cross-coupling M between the rectangular coil and the double spiral series coil in the Tx1RDSSP launch pad. TR1-TSS1 , the rectangular coil in the Tx2RDSSP transmitter pad is cross-coupled with the double helix series coil M TR2-TSS2 , and the cross-coupling M between the rectangular-rectangular coil, double helix series-double helix series coil, and rectangular-double helix series coil in the Tx1RDSSP and Tx2RDSSP transmitting pads TR1-TR2 、M TSS1-TSS2 、M TR1-TSS2 and M TSS1-TR2 . Figure 6 (b)-(d) are different numbers of turns N TSS and design distance l ss Design time Figure 6 The cross coupling between adjacent RDSSP launch pads and their array spacing l described in (a) dis According to the relationship between Figure 6 From (b) to (d), we can see that as the array spacing l dis As the cross coupling increases, it decreases rapidly and then gradually approaches zero. TSS1-TSS2 With the array spacing l dis The increase convergence is relatively slow, and the cross coupling is sensitive to the number of turns and design distance of the double helix series coil. TSSIncrease or design distance l ss The decrease leads to M TSS1-TSS2 Increase, requiring a larger array spacing l dis Designed to converge to zero. Cross-coupling M TR1-TSS1 、M TR2-TSS2 、M TR1-TR2 、M TR1-TSS2 and M TSS1-TR2 Number of turns N TSS Distance from design ss The sensitivity is small, when the array spacing is l dis = 240mm, the cross coupling of this part basically converges to zero. This shows that under the design parameters in Table 1, when l dis =240mm, cross coupling M TR1-TSS1 、M TR2-TSS2 、M TR1-TR2 、M TR1-TSS2 and M TSS1-TR2 Therefore, in order to eliminate or reduce the impact of cross-coupling on system performance, the number of turns N should be reduced as much as possible during the design of the double helix series coil while meeting the power fluctuation suppression requirements. TSS and increase the design distance l ss In addition, according to the above analysis, the cross coupling of the double spiral series coils in adjacent RDSSP transmitting pads (such as M TSS1-TSS2 ) is most obvious under the same parameter settings. Therefore, in order to simplify the cross-coupling acquisition process and reduce time cost, the cross-coupling M TSS1-TSS2 As a benchmark, that is, when the cross-coupling M TSS1-TSS2 When ≈0μH, the cross-coupling between adjacent RDSSP launch pads can be considered to be basically negligible.

[0115] (2.2) Design process of wide-spacing segmented transmitter

[0116] According to the analysis in Section (2.1) above, it can be seen that increasing the design distance l of the double helix series coils ss It can improve the array spacing between adjacent transmitting pads of the segmented transmitting end based on RDSSP. dis and power fluctuation suppression capabilities, thereby effectively reducing the cross-coupling between the transmitting pads; in addition, when the double helix series coil design distance is optimal (i.e., l ss =l ss,opt ) by optimizing the number of turns N TSS It can effectively further improve the power fluctuation capability. Based on this, the optimization design process of the wide-spacing segmented dynamic transmitter based on RDSSP can be summarized as follows: Figure 7 As shown, it is mainly divided into the following steps:

[0117] 1) According to the input and output parameters of the dynamic WPT system (including the input voltage, current, power and output voltage, current or power of the system) and the system installation requirements, determine the size parameters and structural parameters (such as the number of turns N) of the rectangular coil in the RDSSP transmitting pad and the rectangular coil at the receiving end. TR 、N R And the diameter of the Litz wire d C Then initialize and set the number of turns N of the double spiral series coil in the RDSSP transmitter pad. TSS and its design distance l ss , and then use ANSYS Maxwell to analyze the cross-coupling between adjacent RDSSP launch pads and their array spacing l dis The changing relationship between Figure 6 ,according to Figure 6 The cross-coupling variation characteristics in the array are used to select the initial array spacing l dis .

[0118] 2) Based on ANSYS Maxwell and according to formula (7), the effective total mutual inductance M of the receiving end rectangular coil when it moves along the Tx RDSSP segmented transmission track is obtained. TR-R and M TSS-R ,like Figure 3 Then, according to equations (10) and (11) and based on MATLAB, the output voltage V of the dynamic wireless power transmission system is calculated. O The relationship between the fluctuation factor γ and the square of the ratio τ of the compensation capacitors C2 and C1 is as follows: Figure 4 and Figure 5 Then the parameter sweep method is used to obtain the optimal design distance l ss,opt The minimum volatility factor γ under Min , that is, other parameters are fixed, l ss =l ss,opt The corresponding fluctuation factor γ| Min Based on this, at the optimal design distance l ss,opt Next, the parameter sweep method is used again to calculate the number of turns N of the double helix series coil. TSS Perform optimal design to obtain the optimal design distance l ss,opt and the optimal number of turns N TSS,opt Minimum fluctuation factor γ under design | Min,opt , further improving the ability to suppress power fluctuations.

[0119] 3) When the volatility factor γ| Min,opt >γ| Target When , the array spacing l is reduced dis Perform re-iterative design; when the fluctuation factor γ| Min,opt ≤γ| TargetWhen the cross-coupling M of the double helix series coils in the adjacent RDSSP launch pad under the current design parameters is retrieved based on ANSYS Maxwell. TSS1-TSS2 , if the cross coupling M TSS1-TSS2 Approximately equal to zero, then output N TSS 、l ss 、l dis And τ, then determine the design C2 and C1 according to the output gain requirements, and then complete the design process, otherwise the array spacing l needs to be increased dis Re-iterate the design.

[0120] (3) Experimental verification

[0121] (3.1) System structure and experimental platform construction

[0122] Since the working mechanism of the transmitter composed of three RDSSP launch pads is the same as that of the transmitter composed of n RDSSP launch pads, without loss of generality, this experiment uses a wide-pitch segmented transmitter composed of three RDSSP launch pads as an example for experimental verification. The actual figure of the wide-pitch segmented transmitter based on RDSSP designed according to the above optimization results and the size parameters in Table 1 is shown in the figure below. Figure 8 As shown in (b), the secondary side rectangle receiving end is as follows Figure 8 As shown in (a).

[0123] Figure 9 for Figure 8 The total mutual inductance M of the middle rectangular receiving end during the process of moving from the state of being fully aligned with the Tx1RDSSP transmitting pad to the state of being fully aligned with the Tx3RSDDP transmitting pad along the moving direction TR-R and M TSS-R Actual measured value. Figure 10 is the cross-coupling M between adjacent double-helix series coils in the Tx1, Tx2, and Tx3 RDSSP transmitting pads when the rectangular receiving end is at different positions. TSS1-TSS2 With M TSS2-TSS3 Actual measured value. Figure 10 It can be seen that the cross-coupling M TSS1-TSS2 With M TSS2-TSS3 is approximately equal to zero, proving the correctness of the above analysis. Therefore, the influence of cross-coupling on the system output characteristics can be ignored.

[0124] The circuit principle of the dynamic WPT system based on RDSSP wide-space segmented transmitter is as follows: Figure 11As shown. All rectangular and double-helix series coils in the RDSSP transmitting pad are compensated by the LCC compensation topology network, and the secondary rectangular coil uses the series compensation network. Therefore, the weight and complexity of the receiving side are effectively reduced, thereby achieving simplification and lightweighting of the receiving side. Using the construction method of this embodiment, the RDSSP transmitting pad of the dynamic WPT system is driven in parallel by a full-bridge inverter A (composed of MOSFET Q1–Q4) and a full-bridge inverter B (composed of MOSFET Q5–Q8). Where L TR1 ~L TR3 They are the rectangular coils in the RDSSP transmitter pad, driven by inverter A; L TSS1 ~L TSS3 They are the double spiral series coils in the RDSSP transmitter pad, driven by inverter B. In addition, L 11 ~L 13 、C 11 ~C 13 and C TR1 ~C TR3 L TR1 ~L TR3 The corresponding inductance and capacitance of the LCC compensation network; L 21 ~L 23 、C 21 ~C 13 and C TSS1 ~C TSS3 L TSS1 ~L TSS3 The corresponding inductance and capacitance of the LCC compensation network; in order to simplify the design, the compensation capacitance and inductance on each resonant circuit are designed to be equal, as shown in formula (12). In addition, L R 、C R The passive full-bridge rectifier composed of diodes D1–D4 rectifies the AC output voltage induced by the receiving rectangular coil into a DC voltage V O , thus realizing the load R L powered by.

[0125]

[0126] Figure 13 It is a wide-spacing segmented transmitter based on RDSSP and Figure 11 The 1kW dynamic WPT system experimental platform was built based on the schematic diagram in the figure. The dynamic WPT system uses IT6515C DC power supply from ITECH to provide input power. Its DC input voltage V DC The system is fixed at 150V and the operating frequency f is set to 85kHz. According to formula (9), the system can achieve a constant voltage output that is independent of the load. The output voltage V OThe threshold is designed to be 150V. In addition, according to Figure 9 The mutual inductance data in (a) and equations (10) and (11) can be used to obtain the output voltage V O The relationship between the fluctuation factor γ and the square of the ratio of C2 to C1 τ is as follows Figure 12 As shown. Figure 12 It can be seen that when τ = 7.0, the output fluctuation factor γ = 3.83%. Therefore, according to the above analysis method, the specific parameters of the system can be obtained as shown in Table 5. The switch tube QQ8 in inverter A and inverter B is both selected as MOSFET STC4050, and the secondary rectifier (D1-D4) uses diode MBR20200CTG. Inverter A and B use a digital controller to drive the inverter independently. In addition, a programmable DC electronic load DH27605B is used to simulate the load R L , and the output power and efficiency of the system were measured using a power analyzer YOKOGAWA WT1803E.

[0127] Table 5 1kW dynamic WPT system experimental platform parameters

[0128]

[0129] (3.2) Experimental results

[0130] Figure 14 It is the static experimental waveform of the receiving end at different moving positions in the moving direction under full load. Figure 14 (a) shows the experimental waveform when the rectangular receiving end is completely aligned with the Tx1RDSSP transmitting pad (i.e., ΔX = 0 mm). Figure 14 (b) shows the experimental waveform when the receiving-end rectangular coil is moved to the middle position between the Tx1RDSSP and Tx2RDSSP transmitting pads (i.e., ΔX = 310 mm). Channels 3 and 4 of oscilloscope 1 represent the output high-frequency voltage v1 and current i1 of inverter A, respectively, while channels 1 and 2 represent the output high-frequency voltage v2 and current i2 of inverter B, respectively. In addition, channels 1 and 2 of oscilloscope 2 display the input voltage v R and current i R , while channels 3 and 4 are the output DC voltage V of the dynamic WPT system O and current I O The experimental waveforms are shown. It can be seen that the output voltage remains near 150V when the rectangular receiving end is positioned at different locations on the segmented transmitting end. Therefore, the system has good output fluctuation suppression capabilities.

[0131] Figure 15 The output voltage and current waveforms of the dynamic WPT system under different load conditions are shown in Figure 2. Channels 1 and 2 of the oscilloscope are the input voltage v of the secondary rectifier, respectively. R and current iR ; Channels 3 and 4 are the system's output DC voltage V O and current I O .Depend on Figure 15 It can be observed that when the load resistance R L In the process from 20Ω-40Ω-80Ω-40Ω-20Ω, the input voltage of the secondary rectifier v R and the system's DC output voltage V O Basically remain stable. As the load R L As the secondary rectifier input current i R and the system output current I O This shows that the dynamic WPT system has a constant voltage output characteristic that is independent of the load, proving the effectiveness of the above analysis.

[0132] In order to verify the dynamic power suppression capability of the dynamic WPT system with wide-spaced segmented transmitters based on RDSSP, a dynamic test was conducted in which the rectangular receiver moved from ΔX = 0 mm to ΔX = 1240 mm. This means that the rectangular receiver moves from being fully aligned with Tx1RDSSP to being fully aligned with Tx3RDSSP. Figure 13 shown. Figure 16 Full load (R L =22.5Ω). The dynamic waveforms of the voltage and current at the output ports of primary-side inverters A and B during the shift process. Channels 1 and 2 of the oscilloscope represent the dynamic high-frequency output voltage v2 and current i2 of inverter B, respectively, while channels 3 and 4 represent the dynamic high-frequency output voltage v1 and current i1 of inverter A, respectively. Figure 16 It can be seen that during the entire movement of the rectangular receiving end from ΔX = 0mm to ΔX = 1240mm, the dynamic WPT system based on the wide-spaced segmented transmitter of RDSSP can always operate in a smooth and complementary manner, which shows that the magnetic fields of the rectangular coil and the series double helix coil in the wide-spaced segmented transmitter based on RDSSP can work based on a complementary mechanism. In addition, Figure 17 The following are the dynamic output current and voltage experimental waveforms of the secondary side during the entire movement of the rectangular receiving end from ΔX = 0mm to ΔX = 1240mm. Channels 3 and 4 of the oscilloscope are the DC output voltage V O and current I O ; Channel 1 and Channel 2 are the voltage v of the system secondary rectifier input port respectively R and current i R .Depend on Figure 17 It can be seen that during the entire movement of ΔX∈[0mm 1240mm], the output voltage V O It is proved that the segmented dynamic emitter based on RDSSP is effective in achieving wide array spacing ldis At the same time, the dynamic WPT system can achieve effective power fluctuation suppression with smooth and complementary power output.

[0133] Figure 18 is the specific output voltage V when the rectangular receiving end moves to different positions along the direction of motion under full load conditions O .Depend on Figure 18 It can be observed that when the rectangular receiving end moves from ΔX = 0 mm to ΔX = 1240 mm, the output voltage V O The maximum value of V O,max =151.8V, the minimum value is V O,min =145.1V, and its fluctuation is maintained within 3.26%. In addition, Figure 19 is the corresponding output power of the system. It can be found that the output power of the system is basically maintained at around 1kW in the range of ΔX∈[0mm 1240mm]. Therefore, the effectiveness of the proposed wide-spacing segmented transmitter and its optimization design method is further demonstrated.

[0134] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0135] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made based on the essence of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A large-pitch anti-offset segmented magnetic coupler, characterized in that: include: Multiple RDSSP launch pads, each RDSSP launch pad includes a rectangular coil L TR and a double helical series coil L consisting of two identical helical coils in series TS The two spiral coils of the double spiral series coil are designed symmetrically about the Y axis; multiple RDSSP launch pads are arranged in sequence along the X axis. If the double spiral series coils in the RDSSP launch pads at odd positions are wound counterclockwise, then the double spiral series coils in the RDSSP launch pads at even positions are wound clockwise; wherein the spacing between adjacent RDSSP launch pads is greater than the size of a single launch pad; The receiving end includes the secondary rectangular coil L R .

2. A large-pitch anti-offset segmented magnetic coupler according to claim 1, characterized in that: The RDSSP transmitting pad further includes a primary magnetic core plate, and the receiving end further includes a secondary magnetic core plate; The rectangular coil L TR and the secondary rectangular coil L R The dimensions and structural parameters are the same.

3. The large-pitch anti-offset segmented magnetic coupler according to claim 2, characterized in that: The double helix series coils should all be wound on the primary magnetic core plate. The number of turns of the double helix series coils is N. TSS , the distance l between the two symmetrical spiral coils ss and the primary core length l of the RDSSP launch pad TF The following relationship should be satisfied: <h2 style=";text-align:left;direction:ltr">2N<h2 style=";text-align:left;direction:ltr"> TSS <h2 style=";text-align:left;direction:ltr"> d<h2 style=";text-align:left;direction:ltr"> C <h2 style=";text-align:left;direction:ltr"> +l<h2 style=";text-align:left;direction:ltr"> SS <h2 style=";text-align:left;direction:ltr"> ≤l<h2 style=";text-align:left;direction:ltr"> TF Where, d c is the diameter of the Litz wire.

4. A dynamic wireless power transmission system, characterized in that: It comprises the large-pitch anti-offset segmented magnetic coupler as described in any one of claims 1 to 3, as well as a parallel inverter circuit, a primary side compensation circuit, a rectifier circuit and a secondary side compensation circuit.

5. A wide-spacing segmented dynamic transmitter optimization method, characterized in that: The following steps are involved: Construct an equivalent circuit model of a dynamic WPT system with widely spaced segmented transmitters based on RDSSP; According to the constructed equivalent circuit model, the total equivalent mutual inductance M of the rectangular coil, double spiral series coil and secondary rectangular coil is obtained. TR-R and M TSS-R , calculate the output voltage V of the dynamic WPT system O and volatility factor γ; The total mutual inductance M TR-R As the reference amount to be compensated, the spacing between adjacent RDSSP launch pads is l dis The optimization problem is transformed into optimizing the distance l between the double helical series coils. ss and number of turns N TSS question; After the optimization is completed, the optimal distance l is output ss , number of turns N TSS and spacing l dis .

6. The wide-spacing segmented dynamic transmitter optimization method according to claim 5, characterized in that: The output voltage V O The calculation formula is: Where, ω = 2πf, f is the operating frequency of the system; τ is the square of the ratio of the compensation capacitors C2 and C1; C1 is the compensation capacitor; V DC is the input voltage of the DC drive power supply; Among them, the output voltage fluctuation of the dynamic WPT system depends on the equivalent mutual inductance M eq , which is expressed as follows: Output voltage V O The volatility factor is defined as follows: Where M eq | Max and M eq | Min M is the equivalent mutual inductance when the secondary rectangular coil moves along the direction of motion eq The maximum and minimum values ​​of .

7. The wide-spacing segmented dynamic transmitter optimization method according to claim 5, characterized in that: The wide spacing optimization problem is transformed into a problem of optimizing the design of double helical series coils, including: By optimizing the number of turns N of the double helix series coil in the RDSSP launch pad TSS The design distance l between the two symmetrical spiral coils ss , in order to realize the wide array spacing design of adjacent RDSSP transmitting pads in the segmented transmitter while suppressing power fluctuations; When the number of turns N TSS When the output voltage V O The minimum volatility factor γ| min With the design distance l ss The increase of the first decreases and then increases, which shows that at a fixed number of turns N TSS There exists an optimal l ss Design, defined as l ss,opt ; At the optimal design distance l ss Under this condition, there is an optimal number of turns N TSS,opt Based on this, in the process of optimizing the design, the number of turns N of the double helix series coil is kept TSS Get the optimal design distance l under the same conditions ss , then at the optimal design distance l ss Redesign the number of turns N under the conditions TSS .

8. The wide-spacing segmented dynamic transmitter optimization method according to claim 7, characterized in that: The optimization design process is as follows: When l ss <l ss,opt When , the minimum fluctuation factor γ| min With the number of turns N TSS decreases with the increase of ss If it is not enough, increase the number of turns N TSS Can effectively improve the stability of the system output voltage; When l ss >l ss,opt When , the minimum fluctuation factor γ| min With the number of turns N TSS increases with the increase of the number of turns N. TSS increases and decreases, and τ is less than 0; this indicates that at the design distance l ss When sufficient, increasing the number of turns of the double helix series coil will increase the total mutual inductance M TSS-R Transition compensation M TR-R , which results in redundant energy transmission of the double helix series coils, causing excessive use of Litz wire and increasing costs; When l ss ≈l ss,opt When , the minimum fluctuation factor γ| min With the number of turns N TSS The increase of τ first decreases and then increases. At the same time, τ increases with the number of turns N. TSS Increase and decrease.

9. The wide-spacing segmented dynamic transmitter optimization method according to claim 7, characterized in that: The optimal design distance l ss Redesign the number of turns N under the conditions TSS ,include: The output voltage V of the dynamic wireless power transmission system is calculated based on MATLAB O The relationship between the fluctuation factor γ and τ; Where τ is the square of the ratio of compensation capacitors C2 and C1; Use parameter sweep method to obtain the optimal design distance l ss,opt The minimum volatility factor γ under Min , that is, l ss =l ss,opt The corresponding fluctuation factor γ| Min smallest; To obtain the optimal design distance l ss,opt Next, the parameter sweep method is used again to calculate the number of turns N of the double helix series coil. TSS Perform optimal design to obtain the optimal design distance l ss,opt and the optimal number of turns N TSS,opt Minimum fluctuation factor γ under design | Min,opt , further improving the ability to suppress power fluctuations.

10. The wide-spacing segmented dynamic transmitter optimization method according to claim 9, characterized in that: After the optimization is completed, the optimal distance l is output ss , number of turns N TSS and spacing l dis ,include: Judgment γ| Min,opt Is it less than or equal to the preset volatility factor range γ| Target If so, analyze the cross-coupling M between the double-helix series coils in adjacent RDSSP launch pads. TSS1-TSS2 Otherwise, reduce the spacing l according to the preset method dis , return to the optimized design of the distance l of the double helix series coil ss and number of turns N TSS ; If the cross coupling M TSS1-TSS2 Meet the preset requirements and output the optimal distance l ss , number of turns N TSS and spacing l dis Otherwise, increase the spacing l according to the preset method dis , return to the optimized design of the distance l of the double helix series coil ss and number of turns N TSS .

Images