Parameter optimization method, device and system for wireless slip ring magnetic coupling mechanism

Abstract

The invention discloses a parameter optimization method, device and system for a wireless slip ring magnetic coupling mechanism, and belongs to the technical field of electromechanical equipment design, and the parameter optimization method comprises the steps: carrying out the optimization from the aspects of coil parameters, coil turns and magnetic core parameters; performing parameter scanning and optimization selection on the coil parameters in the 2D simulation model to obtain optimized coil parameters, and performing optimization selection on the number of turns of the coil and the magnetic core parameters in the 3D simulation model to obtain optimized number of turns of the coil and optimized magnetic core parameters; further, whether the safety condition that the main magnetic circuit of the magnetic core is unsaturated is met or not is judged, if not, optimization continues, and if yes, a parameter optimization result is output. According to the method, a multivariable optimization problem is equivalent to a multi-single-variable and double-variable optimization problem, and compared with other parameter optimization methods of a magnetic coupling mechanism in a wireless power transmission system, parameter optimization of a coil magnetic core composite system is comprehensively considered, so that the performance of the wireless slip ring magnetic coupling mechanism can be greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of electromechanical equipment design, and more specifically, relates to a parameter optimization method, device and system for a wireless slip ring magnetic coupling mechanism. Background Art

[0002] Mechanical slip rings are a common and mature electromechanical device that transmits electrical power and signals between their stators and rotors through physical contact between carbon brushes and the rotor's conductive rings. They are currently widely used in various rotating equipment in aerospace, medical equipment, wind power generation, and other fields. However, this contact-based power transmission method inevitably causes wear between the slip rings and carbon brushes during long-term high-speed rotation of the rotor, resulting in higher equipment maintenance costs. Short circuits and heat caused by debris generated by wear can also pose a significant threat to the safe and reliable operation of the equipment. Wireless slip rings based on wireless power transfer (WPT) technology, as a contactless power transmission device, provide a viable solution to the above problems.

[0003] The magnetic coupling performance of wireless slip rings is closely related to the parameters of the magnetic coupling mechanism (coil and core parameters). To achieve stable power transmission in the system, it is important to focus on the stability of the electromagnetic parameters of the magnetic coupling mechanism during continuous rotation. Well-designed cores and coils can also help reduce leakage inductance, increase excitation inductance, and improve system power and efficiency. Therefore, optimizing the parameters of the magnetic coupling mechanism is crucial. Recent research has focused on the configuration design of wireless slip ring magnetic coupling mechanisms, while little research has been conducted on parameter optimization methods for similar magnetic coupling mechanisms in wireless slip rings. Furthermore, there is a lack of mature research on the impact of core air gap, coil turns, and other factors on electromagnetic parameters, resulting in poor performance of wireless slip ring magnetic coupling mechanisms. Summary of the Invention

[0004] In response to the above defects or improvement needs of the prior art, the present invention provides a parameter optimization method, device and system for a wireless slip-ring magnetic coupling mechanism, which aims to solve the technical problem of poor performance of the wireless slip-ring magnetic coupling mechanism.

[0005] To achieve the above objectives, according to one aspect of the present invention, a method for optimizing parameters of a wireless slip ring magnetic coupling mechanism is provided, comprising:

[0006] S1: Determine the structural parameters to be optimized of the wireless slip ring magnetic coupling mechanism and their corresponding parameter constraints, wherein the structural parameters to be optimized include coil parameters, coil turns, and magnetic core parameters;

[0007] S2: Based on the parameter constraints and the principle that the excitation inductance is much larger than the secondary leakage inductance converted to the primary side and the total leakage inductance is lower than a preset value, the coil parameters are scanned and optimized in the 2D simulation model to obtain optimized coil parameters, and the number of coil turns and the core parameters are optimized in the 3D simulation model to obtain optimized coil turns and optimized core parameters;

[0008] S3: Inputting the optimized coil parameters, the optimized number of coil turns, and the optimized magnetic core parameters into a circuit model and a magnetic circuit model for joint simulation to determine whether the wireless slip ring magnetic coupling mechanism corresponding to the optimized coil parameters, the optimized number of coil turns, and the optimized magnetic core parameters meets a safety condition that the main magnetic circuit of the magnetic core is not saturated;

[0009] S4: If the safety condition is not met, the core size in the optimized core parameters is adjusted, and the process returns to S3 to re-simulate and judge until the corresponding wireless slip ring magnetic coupling mechanism meets the safety condition. If so, the optimized coil parameters, the optimized number of coil turns, and the optimized core parameters that meet the safety condition are output.

[0010] In one embodiment, the coil parameters include: single-turn coil wire diameter, primary-secondary coil spacing, and primary-secondary coil turns ratio.

[0011] In one embodiment, the magnetic core parameters include: magnetic core air gap size, magnetic core size parameter and magnetic core quantity parameter.

[0012] In one embodiment, the S2 includes:

[0013] S21: Based on the parameter constraints and the principle that the excitation inductance is much larger than the secondary leakage inductance converted to the primary side and the total leakage inductance is lower than a preset value, the coil parameters are scanned and optimized in the 2D simulation model to obtain the optimized coil parameters;

[0014] S22: Sweeping the magnetic core air gap size and the magnetic core size parameter in the 2D simulation model to determine a relationship curve between different magnetic core air gap sizes and magnetic core size parameters and the performance of the wireless slip ring magnetic coupling mechanism; Sweeping the number of magnetic cores in the 3D simulation model to determine a relationship curve between different numbers of magnetic cores and the performance of the wireless slip ring magnetic coupling mechanism;

[0015] S23: Determine, from the three relationship curves, a first key parameter corresponding to a greater impact on leakage inductance and a second key parameter corresponding to a greater impact on magnetizing inductance;

[0016] S24: In the 3D simulation model, the first key parameter is first optimized, the core size parameter is then optimized, and the second key parameter is finally optimized to obtain an optimized coil turn number and an optimized core parameter.

[0017] In one embodiment, the first key parameter in S23 includes: the number of turns of the primary coil and the number of turns of the secondary coil.

[0018] In one embodiment, the second key parameter in S23 includes: the size of the magnetic core air gap and the number of magnetic cores.

[0019] In one embodiment, the parameters corresponding to the performance of the wireless slip ring magnetic coupling mechanism include: excitation inductance, leakage inductance and maximum magnetic flux density of the main magnetic circuit.

[0020] According to another aspect of the present invention, a parameter optimization device for a wireless slip ring magnetic coupling mechanism is provided, comprising:

[0021] A preprocessing module is used to determine the structural parameters to be optimized of the wireless slip ring magnetic coupling mechanism and their corresponding parameter constraints, wherein the structural parameters to be optimized include coil parameters, coil turns, and magnetic core parameters;

[0022] an optimization module for scanning and selecting the coil parameters in a 2D simulation model to obtain optimized coil parameters based on the parameter constraints and the principle that the excitation inductance is much greater than the secondary leakage inductance converted to the primary side and the total leakage inductance is lower than a preset value, and for selecting the coil turns and the magnetic core parameters in a 3D simulation model to obtain optimized coil turns and optimized magnetic core parameters;

[0023] a simulation module, configured to input the optimized coil parameters, the optimized number of coil turns, and the optimized magnetic core parameters into a circuit model and a magnetic circuit model for joint simulation, so as to determine whether the wireless slip ring magnetic coupling mechanism corresponding to the optimized coil parameters, the optimized number of coil turns, and the optimized magnetic core parameters satisfies a safety condition that the main magnetic circuit of the magnetic core is not saturated;

[0024] A processing module is configured to adjust the core size in the optimized core parameters if the safety condition is not met, and return to S3 to re-simulate and judge until the corresponding wireless slip ring magnetic coupling mechanism meets the safety condition, and if so, output the optimized coil parameters, the optimized number of coil turns, and the optimized core parameters that meet the safety condition.

[0025] According to another aspect of the present invention, a parameter optimization system for a wireless slip ring magnetic coupling mechanism is provided, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

[0026] According to another aspect of the present invention, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above method are implemented.

[0027] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0028] (1) The present invention provides a parameter optimization method for a wireless slip ring magnetic coupling mechanism, which optimizes the coil parameters, coil turns and core parameters; in a 2D simulation model, the coil parameters are scanned and optimized to obtain the optimized coil parameters, and in a 3D simulation model, the coil turns and core parameters are optimized to obtain the optimized coil turns and core parameters; further, it is determined whether the safety condition of the main magnetic circuit of the core is not saturated is met, if not, the optimization is continued, and if met, the parameter optimization result is output; the present invention equates the multivariable optimization problem to a plurality of single variable and double variable optimization problems, which has an important guiding role in the parameter optimization of the magnetic coupling mechanism of the coil-core composite system such as the wireless slip ring; compared with other parameter optimization methods of the magnetic coupling mechanism in the wireless power transmission system, the parameter optimization of the coil-core composite system is comprehensively considered, which includes the optimization mode of the traditional unipolar coil system without a magnetic core, and can meet the electrical and engineering requirements under high power transmission in the system, while also taking into account the electromagnetic constraints, avoiding the magnetic saturation, high energy consumption and high cost problems that may be caused by the addition of the magnetic core, and can greatly improve the performance of the wireless slip ring magnetic coupling mechanism.

[0029] (2) In this solution, the core air gap size and the core size parameters are scanned in the 2D simulation model to determine the relationship curves between the different core air gap sizes and the core size parameters and the performance of the wireless slip ring magnetic coupling mechanism; the number of cores is scanned in the 3D simulation model to determine the relationship curves between the different numbers of cores and the performance of the wireless slip ring magnetic coupling mechanism; the first key parameter corresponding to the greater influence on leakage inductance and the second key parameter corresponding to the greater influence on excitation inductance are determined from the three relationship curves; such a design is the first to systematically analyze the wireless slip ring type magnetic coupling structure and propose the influence trend and degree of each structural parameter on the electromagnetic parameters, comprehensively consider the differentiated influence mechanism and design constraints of each structural parameter of the slip ring on the electromagnetic performance, which is conducive to the decoupling analysis of parameters and simplifies the design process; enhance the interpretability of the optimization method, and realize the directional optimization of leakage inductance and excitation inductance through precise control of performance; give full play to the advantages of 2D and 3D simulation, realize efficient allocation of computing resources, and significantly reduce the computing cost of full parameter simulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1This is a flow chart of a parameter optimization method for a wireless slip ring magnetic coupling mechanism provided in Example 1 of the present invention.

[0031] Figure 2 This is a flow chart of another parameter optimization method for a wireless slip ring magnetic coupling mechanism provided in Example 1 of the present invention.

[0032] Figure 3 A schematic structural diagram of a wireless slip ring magnetic coupling mechanism provided in Example 1 of the present invention;

[0033] Figure 4 A circuit topology diagram after the secondary side parameters provided in Example 1 of the present invention are converted to the primary side;

[0034] Figure 5 A schematic diagram of parameters to be optimized in Example 1 of the present invention;

[0035] Figure 6 (a) d and L under Maxwell 2D simulation provided in Example 1 of the present invention m , (b) d and L k , (c) Δd and L m , (d)Δd and L k , (e)N i With L m , (f)N i With L k , (g)gap and L m , (h)gap and L k Relationship curve / surface diagram;

[0036] Figure 7 The relationship curve diagram of Example 1 of the present invention under Maxwell 2D simulation; (a) represents the relationship between dH1 (dH2) and L k (b) shows the relationship between dρ and L k (c) shows the relationship between dH1 (dH2) and L m The relationship curve of dρ and L is shown in (d). m The relationship curve diagram;

[0037] Figure 8 The relationship curve diagram of Example 1 of the present invention under Maxwell 3D simulation; (a) represents N and L m The relationship curve diagram of N and L is shown in (b). k The relationship curve diagram of N1 and L k The relationship curve of gap and L m The relationship curve of gap and L is shown in (e). k2 'Relationship curve, (f) represents the gap and L kThe relationship curve diagram;

[0038] Figure 9 Figure 2 shows the time domain waveforms of the load current (a), load voltage (b), primary current (c), secondary voltage (d), and resonant capacitor voltage (e) of an embodiment of the present invention under Simplorer+Maxwell joint simulation, as well as the maximum magnetic density diagram in the main magnetic circuit (f). DETAILED DESCRIPTION

[0039] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0040] Example 1

[0041] This embodiment provides a parameter optimization method for a wireless slip ring magnetic coupling mechanism, wherein the applicable wireless slip ring magnetic coupling mechanism includes a primary coil, a secondary coil, and a magnetic core, wherein the coils are wound with Litz wire, the magnetic core is made of ferrite, the primary and secondary coils are coaxially arranged, and the outer diameter of the primary coil is larger than that of the secondary coil; the wireless slip ring includes a pair of rotors and stators, wherein the rotor includes a circular rotating gantry, a secondary winding coil, and a baffle, and the stator includes a circular fixed gantry, a primary winding coil, and several discrete C-shaped magnetic cores, and a single C-shaped magnetic core is obtained by splicing a pair of identical U-shaped magnetic cores and cutting out an air gap. Figure 1 As shown, the parameter optimization method of the wireless slip ring magnetic coupling mechanism includes: S1-S4.

[0042] S1: Determine the structural parameters to be optimized for the wireless slip ring magnetic coupling mechanism and their corresponding parameter constraints. The structural parameters to be optimized include coil parameters, coil turns, and core parameters. Preferably, the coil parameters include single-turn coil wire diameter, primary-to-secondary coil spacing, and primary-to-secondary coil turns ratio. Optionally, the core parameters include core air gap size, core size parameters, and core quantity parameters.

[0043] S2: Based on the parameter constraints and the principle that the excitation inductance is much larger than the secondary leakage inductance converted to the primary side and the total leakage inductance is lower than the preset value, the coil parameters are scanned and optimized in the 2D simulation model to obtain the optimized coil parameters, and the coil turns and core parameters are optimized in the 3D simulation model to obtain the optimized coil turns and optimized core parameters.

[0044] S3: The optimized coil parameters, optimized coil turns, and optimized core parameters are input into the circuit model and the magnetic circuit model for joint simulation to determine whether the wireless slip ring magnetic coupling mechanism corresponding to the optimized coil parameters, optimized coil turns, and optimized core parameters meets the safety condition that the main magnetic circuit of the magnetic core is not saturated.

[0045] S4: If the safety conditions are not met, the core size in the optimized core parameters is adjusted, and the process returns to S3 for re-simulation and judgment until the corresponding wireless slip ring magnetic coupling mechanism meets the safety conditions. If so, the optimized coil parameters, optimized coil turns, and optimized core parameters that meet the safety conditions are output.

[0046] For example, a wireless slip ring magnetic coupling mechanism with good performance in the prior art is described, which can be used in a computed tomography imaging system, specifically including a pair of rotors and stators; the rotor includes an annular rotating gantry, a secondary winding coil and a baffle, the outer surface of the rotating gantry has a first annular groove, the secondary winding coil is wound on the rotating gantry along the first annular groove, and the baffle is arranged at the opening of the first annular groove to fix the secondary winding coil in the first annular groove; the stator includes an annular fixed gantry, a primary winding coil and a plurality of discrete C-shaped magnetic cores, and the fixed gantry is coaxial with the rotating gantry The fixed frame is located radially outward from the rotating frame or axially parallel to the rotating frame. The outer surface of the fixed frame has a second annular groove. The primary winding coil is wound around the fixed frame along the second annular groove. Each C-shaped core is fixed to the fixed frame by a fixing member and is evenly distributed. The area where the rotating frame is wound around the secondary winding coil and the fixed frame pass through the C-shaped core. The opening of the C-shaped core is located on one side of the rotating frame. During operation, an external drive motor drives the rotating frame to rotate the rotor. During rotation, the rotating frame passes through the inside of the core, but the rotor does not make any contact with the stator. The average transmission power of the slip ring is expected to be 10kW.

[0047] Table 1 Summary of trends and degrees of influence of various structural parameters on various electromagnetic parameters

[0048]

[0049] Note: In the table, "+" indicates a positive correlation between the horizontal and vertical parameters, and "-" indicates a negative correlation. A greater number of symbols indicates a more significant impact. "-+" indicates a negative followed by a positive. "N" indicates that the horizontal parameter has a negligible effect on the vertical parameter. " / " indicates that the effect of the horizontal parameter on the vertical parameter does not need to be considered.

[0050] In one embodiment, Figure 2As shown, S2 includes: S21: Based on parameter constraints and the principle that the excitation inductance is much greater than the secondary leakage inductance converted to the primary, and the total leakage inductance is lower than a preset value, the coil parameters are scanned in a 2D simulation model to obtain optimized coil parameters. S22: In the 2D simulation model, the core air gap size and core size parameters are scanned to determine relationship curves between different core air gap sizes and core size parameters and the performance of the wireless slip ring magnetic coupling mechanism; in the 3D simulation model, the number of cores is scanned to determine the relationship curve between different numbers of cores and the performance of the wireless slip ring magnetic coupling mechanism. S23: From the three relationship curves, a first key parameter corresponding to a significant impact on leakage inductance and a second key parameter corresponding to a significant impact on excitation inductance are determined. S24: In the 3D simulation model, the first key parameter is optimized first, followed by the core size parameter, and finally by the second key parameter, to obtain the optimized coil turns and optimized core parameters. Optionally, the first key parameter in S23 includes the number of primary coil turns and the number of secondary coil turns. Optionally, the second key parameter in S23 includes: the size of the magnetic core air gap and the number of magnetic cores. Preferably, the parameters corresponding to the performance of the wireless slip ring magnetic coupling mechanism include: excitation inductance, leakage inductance and maximum magnetic flux density of the main magnetic circuit.

[0051] For Figure 3 The wireless slip ring magnetic coupling mechanism shown in FIG. Figure 3 (a) and (b) in the figure represent the three-dimensional diagram and cross-sectional diagram of the wireless slip ring structure respectively. The parameters to be optimized and their distribution positions are shown in the figure. Figure 5 As shown in (a), (b) and (c) in the figure. The average power of the designed slip ring is 10kW. Figure 4 The circuit topology shown is calculated, where Figure 4 (a), (b), and (c) represent the complete circuit topology of the wireless slip ring system, the circuit topology after fundamental wave simplification, and the circuit topology after the secondary side parameters are further converted to the primary side. The optimization goals of the technical solution are set as follows: 1) The excitation inductance is much larger than the secondary side leakage inductance converted to the primary side, that is, L m >>L′ k2 ; 2) The main magnetic circuit of the core should not be saturated; 3) The total leakage inductance L k Should not exceed 40μH.

[0052] First, consider the effect of wire diameter d on the magnetizing inductance L. m and total leakage inductance L k Through Maxwell 2D simulation, the wire diameter d and L can be obtained. m The relationship between d and L k The relationship between Figure 6It is worth noting that the 2D simulation here is only used for qualitative analysis. Obviously, as d increases, L k and L m When d is greater than 5mm, L k and L m The range of change of d is no longer significant, which can be called edge effect. k The impact is greater than that on L m On the other hand, the winding weight is related to d 2 Increasing d significantly increases rotor weight and wire manufacturing costs. Excessively large d also limits the number of coil turns. Considering these factors, a wire diameter of 5 mm was ultimately chosen.

[0053] Then, consider the effect of the distance Δd between the primary and secondary coils on L m and L k By performing Maxwell 2D simulation, we can get the relationship between Δd and L m The relationship between Δd and L k The relationship between Figure 6 As shown in (c) and (d), it can be seen that the smaller Δd is, the smaller L k The smaller the L m The larger the Δd, the more it increases. This trend is linear. Therefore, theoretically, a smaller Δd improves device performance. However, in practice, Δd cannot be reduced indefinitely due to limitations in the thickness of the coil mounting mechanism, machining accuracy, and the amplitude of rotational vibration. Therefore, a Δd of 20 mm was ultimately chosen as the minimum safe spacing achievable during machining.

[0054] In addition, consider the number of turns N i For excitation inductance L m and total leakage inductance L k Through Maxwell2D simulation, we can get N i With L m and N i With L k The relationship between Figure 6 As shown in (e) and (f) in the figure. Among them, N1 represents the number of turns of the primary side, and N2 represents the number of turns of the secondary side. From this we can conclude that the larger N1 is, the larger L m and L k At the same time, it is known in advance that increasing the number of turns N i It can reduce the inter-turn voltage and thus reduce the insulation requirements of the wire. mThe effect of N1 is minimal. For a given N1, the minimum leakage inductance is achieved when the turns ratio n = N1:N2 is in the range [0.42, 0.56]. Ultimately, the turns ratio n is selected to be 1:2.

[0055] Based on the optimization parameters mentioned above, the effect of air gap length on the excitation inductance L is considered. m and total leakage inductance L k Through Maxwell 2D simulation, the air gap and L m The relationship between air gap and L k The relationship between Figure 6 As shown in (g) and (h) in the figure, it can be seen that as the air gap increases, L m Monotonically decreasing, and the rate of decrease is fast at first and then slow; while L k The change of L is very small and can be ignored. m and L k Through Maxwell 2D simulation, it is found that the cross-sectional area of ​​the core has the most significant impact on the magnetic coupling performance of the core; Figure 7 As shown in (a) and (b) in Figure 2, the influence of the cross-sectional area of ​​the core on the leakage inductance is extremely small and can be ignored. Figure 7 As shown in (c) and (d) in Figure 1, the diameters dH of the upper and lower core columns (especially the diameter dH2 of the lower core column) have a significant impact on the excitation inductance, while the impact of the other core columns is relatively small. The UY15 ferrite core was ultimately selected. This core is made of LP3A material. According to technical specifications, the saturation magnetic density of this core at 100°C is approximately 0.3T. By splicing two UY15 cores together and then cutting them, a C-shaped core can be obtained. In addition, considering the actual installation scenario of the CT, the inner diameter "r" of the slip ring is set to 560mm. The coil winding is arranged at the geometric center of the core cavity.

[0056] Then, the influence of the number of cores N is considered. Through Maxwell 3D simulation, N and L are obtained. m The relationship between N and L k The relationship between Figure 8 As shown in (a) and (b) in the figure, as N increases, L m It increased significantly in an approximately linear trend; L k It also increases slightly in an approximately linear trend, but the growth trend is very limited. Based on the above analysis, it can be concluded that the air gap length and the number of cores have a significant impact on L k The effect of the primary side turns N1 on L is much smaller than that of the primary side turns N1 on L k This shows that according to L k The final optimization goal is to first determine N1 directly; after the determination is completed, then according to L mUsing all the above optimization parameters, N1 and L can be obtained through Maxwell 3D simulation. k The relationship between Figure 8 As shown in (c) in the figure, it can be seen that when N1 does not exceed 4, the leakage inductance L k It will not exceed 40μH. Therefore, N1 is finally selected as 4.

[0057] Figure 8 (d) to (f) show the L under different N values ​​in 3D simulation. m , L k and L k2 'The trend of changing with the air gap. In addition to the above conclusions, on the one hand, it can be seen from the figure that the larger N is, the smaller L k2 'The smaller it is, the larger L can be obtained by increasing N m / L k2 '. When the air gap is set to 16mm, at the same N value, L k2 ' reaches the minimum value. On the other hand, the increase in the number of cores will also increase the core loss, and the processing accuracy also limits the reduction of the air gap. Based on the above considerations, the air gap length is set to 16mm, and N is finally selected as 40. At this time, L m 93.3μH, converted to the secondary leakage inductance L of the primary side k2 ' is 3.91μH (much less than 93.3μH=L m ), total leakage inductance L k The value is 35.3μH (less than 40μH), which meets the constraint conditions. At this point, all parameters have been optimized, see Table 2. Based on the above modeling parameters, the circuit model was established in Simplorer and a joint simulation of Simplorer and Maxwell was performed. The relevant waveforms are shown in Figure 2. Figure 9 The relevant circuit parameters are shown in Table 2. Ignoring ferromagnetic loss, when the output power reaches 10.2kW, the DC-DC efficiency reaches 93.6%, and the maximum magnetic density of the main magnetic circuit is 58mT, which is lower than the saturation magnetic density. The design meets the preliminary requirements.

[0058] Table 2 Joint simulation circuit parameters

[0059]

[0060] Build an experimental platform for experimental testing and measure the leakage inductance L k 38.1μH, converted to the secondary leakage inductance L of the primary side k2 ' is 3.91μH, L m It is 85.2μH, which is consistent with the simulation.

[0061] Example 2

[0062] This embodiment provides a parameter optimization device for a wireless slip ring magnetic coupling mechanism, including: a preprocessing module, an optimization module, a simulation module, and a processing module.

[0063] The preprocessing module is used to determine the structural parameters to be optimized and their corresponding parameter constraints of the wireless slip ring magnetic coupling mechanism. The structural parameters to be optimized include: coil parameters, coil turns and magnetic core parameters.

[0064] The optimization module is used to scan and select the coil parameters in the 2D simulation model to obtain the optimized coil parameters based on the parameter constraints and the principle that the excitation inductance is much larger than the secondary leakage inductance converted to the primary side and the total leakage inductance is lower than the preset value. In the 3D simulation model, the coil turns and core parameters are optimized to obtain the optimized coil turns and core parameters.

[0065] The simulation module is used to input the optimized coil parameters, the optimized coil turns and the optimized magnetic core parameters into the circuit model and the magnetic circuit model for joint simulation to determine whether the wireless slip ring magnetic coupling mechanism corresponding to the optimized coil parameters, the optimized coil turns and the optimized magnetic core parameters meets the safety condition that the main magnetic circuit of the magnetic core is not saturated.

[0066] The processing module is used to adjust the core size in the optimized core parameters if the safety conditions are not met, and return to S3 to re-simulate and judge until the corresponding wireless slip ring magnetic coupling mechanism meets the safety conditions. If so, the optimized coil parameters, optimized coil turns and optimized core parameters corresponding to the safety conditions are output.

[0067] Example 3

[0068] This embodiment provides a parameter optimization system for a wireless slip ring magnetic coupling mechanism, including a memory and a processor. The memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

[0069] Example 4

[0070] This embodiment provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the above method are implemented.

[0071] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A parameter optimization method for a wireless slip ring magnetic coupling mechanism, characterized in that: include: S1: Determine the structural parameters to be optimized of the wireless slip ring magnetic coupling mechanism and their corresponding parameter constraints, wherein the structural parameters to be optimized include coil parameters, coil turns, and magnetic core parameters; S2: Based on the parameter constraints and the principle that the excitation inductance is much larger than the secondary leakage inductance converted to the primary side and the total leakage inductance is lower than a preset value, the coil parameters are scanned and optimized in the 2D simulation model to obtain optimized coil parameters, and the number of coil turns and the core parameters are optimized in the 3D simulation model to obtain optimized coil turns and optimized core parameters; S3: Inputting the optimized coil parameters, the optimized number of coil turns, and the optimized magnetic core parameters into a circuit model and a magnetic circuit model for joint simulation to determine whether the wireless slip ring magnetic coupling mechanism corresponding to the optimized coil parameters, the optimized number of coil turns, and the optimized magnetic core parameters meets a safety condition that the main magnetic circuit of the magnetic core is not saturated; S4: If the safety condition is not met, the core size in the optimized core parameters is adjusted, and the process returns to S3 to re-simulate and judge until the corresponding wireless slip ring magnetic coupling mechanism meets the safety condition. If so, the optimized coil parameters, the optimized number of coil turns, and the optimized core parameters that meet the safety condition are output.

2. The parameter optimization method of the wireless slip ring magnetic coupling mechanism according to claim 1, characterized in that: The coil parameters include: single-turn coil wire diameter, primary-to-secondary coil spacing, and primary-to-secondary coil turns ratio.

3. The parameter optimization method of the wireless slip ring magnetic coupling mechanism according to claim 1, characterized in that: The magnetic core parameters include: magnetic core air gap size, magnetic core size parameters and magnetic core quantity parameters.

4. The parameter optimization method of the wireless slip ring magnetic coupling mechanism according to claim 3, characterized in that: The S2 includes: S21: Based on the parameter constraints and the principle that the excitation inductance is much larger than the secondary leakage inductance converted to the primary side and the total leakage inductance is lower than a preset value, the coil parameters are scanned and optimized in the 2D simulation model to obtain the optimized coil parameters; S22: Sweeping the magnetic core air gap size and the magnetic core size parameter in the 2D simulation model to determine a relationship curve between different magnetic core air gap sizes and magnetic core size parameters and the performance of the wireless slip ring magnetic coupling mechanism; Sweeping the number of magnetic cores in the 3D simulation model to determine a relationship curve between different numbers of magnetic cores and the performance of the wireless slip ring magnetic coupling mechanism; S23: Determine, from the three relationship curves, a first key parameter corresponding to a greater impact on leakage inductance and a second key parameter corresponding to a greater impact on magnetizing inductance; S24: In the 3D simulation model, the first key parameter is first optimized, the core size parameter is then optimized, and the second key parameter is finally optimized to obtain an optimized coil turn number and an optimized core parameter.

5. The parameter optimization method of the wireless slip ring magnetic coupling mechanism according to claim 4, characterized in that: The first key parameter in S23 includes: the number of turns of the primary coil and the number of turns of the secondary coil.

6. The parameter optimization method of the wireless slip ring magnetic coupling mechanism according to claim 4, characterized in that: The second key parameters in S23 include: the size of the magnetic core air gap and the number of magnetic cores.

7. The parameter optimization method of the wireless slip ring magnetic coupling mechanism according to claim 4, characterized in that: The parameters corresponding to the performance of the wireless slip ring magnetic coupling mechanism include: excitation inductance L m , leakage inductance and maximum magnetic flux density B of the main magnetic circuit m .

8. A parameter optimization device for a wireless slip ring magnetic coupling mechanism, characterized in that: include: A preprocessing module is used to determine the structural parameters to be optimized of the wireless slip ring magnetic coupling mechanism and their corresponding parameter constraints, wherein the structural parameters to be optimized include coil parameters, coil turns, and magnetic core parameters; an optimization module for scanning and selecting the coil parameters in a 2D simulation model to obtain optimized coil parameters based on the parameter constraints and the principle that the excitation inductance is much greater than the secondary leakage inductance converted to the primary side and the total leakage inductance is lower than a preset value, and for selecting the coil turns and the magnetic core parameters in a 3D simulation model to obtain optimized coil turns and optimized magnetic core parameters; a simulation module, configured to input the optimized coil parameters, the optimized number of coil turns, and the optimized magnetic core parameters into a circuit model and a magnetic circuit model for joint simulation, so as to determine whether the wireless slip ring magnetic coupling mechanism corresponding to the optimized coil parameters, the optimized number of coil turns, and the optimized magnetic core parameters satisfies a safety condition that the main magnetic circuit of the magnetic core is not saturated; A processing module is configured to adjust the core size in the optimized core parameters if the safety condition is not met, and return to S3 to re-simulate and judge until the corresponding wireless slip ring magnetic coupling mechanism meets the safety condition, and if so, output the optimized coil parameters, the optimized number of coil turns, and the optimized core parameters that meet the safety condition.

9. A parameter optimization system for a wireless slip ring magnetic coupling mechanism, comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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