Magnetic steel coil wireless power supply method and device based on electromagnetic induction

Abstract

The invention particularly relates to a magnetic steel coil wireless power supply method and device based on electromagnetic induction, and the method comprises the steps: constructing an electromagnetic induction device model, and carrying out the analysis and calculation of the magnetic field intensity of a magnetic ring, and obtaining the magnetizing amount of the magnetic ring; obtaining the parameter configuration of the receiving coil through the quality factor of the chaotic particle algorithm; calculating the capacitance value of a capacitor and the resistance value of a resistor in the receiving circuit; constructing a receiving circuit model in the simulation tool, observing voltage change, recording a power supply change curve, and checking the performance of the receiving circuit model; constructing an electromagnetic induction process model, and simulating the relative motion of the receiving coil relative to the induction device in the motion process; verifying the charging performance; and simulating the distribution and change of an electromagnetic field by adopting a finite element method according to set motion parameters and output parameters of the induction device, and performing simulation verification on the electromagnetic induction process model. According to the invention, rapid charging can be realized, stable voltage can be maintained for a long time, and instantaneous power supply requirements are met.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless power supply, and in particular to a magnetic steel coil wireless power supply method and device based on electromagnetic induction. Background Art

[0002] Traditional wireless power supply methods mainly rely on dual induction coils at the transmitter and receiver, but dual induction coil power supply is sensitive to metal materials and metal affects energy transfer efficiency. The transmitting coil skeleton is often made of non-metallic materials. Under extreme environmental conditions, reliability and impact resistance are greatly challenged. Therefore, the electromagnetic induction-based magnetic steel-coil wireless power supply method has become an important development direction for wireless power supply due to its non-contact, low wear, and impact resistance. The basic principle is to induce an electromotive force in the coil through the relative movement or magnetic field change between the coil and the magnetic steel magnetic field, thereby realizing the transmission of electrical energy. Summary of the invention

[0003] In order to solve the problems of poor working reliability, weak impact strength, poor environmental adaptability and special requirements for structural materials in the conventional power supply method of dual induction coils at the transmitting end and the receiving end in the prior art, the present invention provides a wireless power supply method and device of a magnetic steel coil based on electromagnetic induction. This power supply method can not only avoid the problem of special requirements for structural materials of the dual induction coils, but also power the receiving coil instantly, ensuring the stability and reliability of the receiving coil in instantaneous operation.

[0004] The present invention is implemented by adopting the following technical solution: a magnetic steel coil wireless power supply method based on electromagnetic induction, comprising:

[0005] Step S1: construct an electromagnetic induction device model according to the actual scenario, establish a cylindrical coordinate system of the magnetic ring model with set indicators, and obtain the magnetization amount of the magnetic ring by analytically calculating the magnetic field strength of the magnetic ring;

[0006] Step S2: Select the parameters of the receiving coil structure according to the actual scenario, obtain the self-inductance value through the quality factor of the chaotic particle algorithm, and use the self-inductance value of the receiving coil and the coil resistance to calculate and obtain the parameter configuration of the receiving coil;

[0007] Step S3: assembling a receiving circuit structure for energy storage according to circuit design indicators, and calculating the capacitance value of the capacitor and the resistance value of the resistor in the receiving circuit;

[0008] Step S4: constructing a receiving circuit model in a simulation tool according to the receiving circuit structure, and performing a discharge simulation analysis on the receiving circuit after the receiving circuit is charged, observing the voltage level change and recording the power supply change curve, and verifying the receiving circuit model performance;

[0009] Step S5: Use a simulation tool to build an electromagnetic induction process model to simulate the relative movement of the receiving coil relative to the induction device during the movement process; verify the charging performance of the model;

[0010] Step S6: According to the motion parameters and output parameters of the induction device, the finite element method is used to simulate the distribution and change of the electromagnetic field, and the electromagnetic induction process model is simulated and verified.

[0011] Preferably, the magnetization amount of the magnetic ring is obtained by analytically calculating the magnetic field strength of the magnetic ring, including: applying Maxwell's equations, according to the magnetic charge model and scalar magnetic potential, to solve the radial distance, azimuth and height along the center axis of the magnetic ring from the magnetic field strength at any point in space to the center axis of the magnetic ring.

[0012] Preferably, the cylindrical coordinate system of the magnetic ring model established by setting indicators includes: magnetic ring size parameters, receiving coil size and discharge time, and the magnetic field strength of the magnetic ring includes radial distance, azimuth direction and altitude direction of the magnetic field strength.

[0013] Preferably, the self-inductance value obtained by the quality factor of the chaotic particle algorithm includes: (1) initializing the particle group: including the optimization variables of each particle; randomly generating a set of coil parameters for each particle; (2) calculating the fitness: evaluating each individual particle, calculating the self-inductance value through the coil quality factor according to the self-inductance and resistance design of the spatial spiral coil, and obtaining the maximum Q-factor (quality factor) of the receiving coil parameters, that is, establishing the objective function to calculate the fitness; (3) updating the individual optimal and global optimal solutions: according to the fitness of the particle, if the current fitness of the particle is better than the individual optimal fitness, then updating the historical optimal position of each particle; if the current fitness of the particle is better than the global optimal fitness, then updating the global optimal position; (4) updating the particle position: according to the individual optimal solution, the global optimal solution and the chaotic mapping sequence, using the position update formula to update the position of each particle; (5) repeating the steps of evaluating the fitness, updating the individual optimal and global optimal and updating the particle position until the stop condition is met; returning the global optimal position and fitness as the solution to the optimization problem.

[0014] Preferably, obtaining the parameter configuration of the receiving coil includes: determining the constraint conditions to be the physical size parameters and material properties of the receiving coil.

[0015] Preferably, the receiving circuit includes a diode, a first capacitor, a second capacitor and a resistor, the anode of the diode is connected to one end of the receiving coil, and the other end of the receiving coil is grounded; the induced electromotive force generated by the coil is converted into direct current; the first capacitor, the second capacitor and the resistor are connected to form a parallel combination circuit, and the cathode of the diode is connected between the parallel combination circuit and the branch ground.

[0016] Preferably, before the receiving circuit is charged, the method includes: setting a band of the capacitor electromotive force within a predetermined time.

[0017] The present invention also provides a magnetic steel coil wireless power supply device based on electromagnetic induction, comprising an induction device, a receiving coil and a receiving circuit, wherein the receiving coil is wound on a plastic gasket; a receiving circuit is installed on the upper part of the receiving coil, and an induction device is provided adjacent to both sides of the receiving coil and the receiving circuit, wherein the induction device comprises a magnetic ring, a shell and a buckle, and a magnetic ring with a fixed position and direction is installed in the shell.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The method of the present invention is suitable for occasions with high structural strength and harsh working environment. It can avoid the problem that the dual induction coil power supply is sensitive to metal materials and metal affects the energy transfer efficiency. The transmitting coil skeleton is often made of non-metallic materials. Under extreme environmental conditions, the reliability and impact resistance are greatly challenged. By using chaotic mapping to generate a random number sequence, the pseudo-random number sequence in the traditional particle swarm algorithm is replaced, thereby increasing the randomness and diversity of the algorithm. The device realizes non-contact energy transmission through changes in the magnetic field to ensure that the receiving circuit obtains the required electrical energy in an instant. It has a good fast charging capability and can provide sufficient energy reserves for the fuze in a short time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the magnetic steel coil wireless power supply device based on electromagnetic induction of the present invention.

[0021] Figure 2 It is a schematic diagram of the structure of the induction device of the magnetic steel coil wireless power supply device based on electromagnetic induction of the present invention.

[0022] Figure 3 It is a receiving coil model diagram of the magnetic steel coil wireless power supply method based on electromagnetic induction of the present invention.

[0023] Figure 4 It is a receiving circuit diagram of the magnetic steel coil wireless power supply method based on electromagnetic induction of the present invention.

[0024] Figure 5 It is a capacitor charging voltage curve diagram of the magnetic steel coil wireless power supply method based on electromagnetic induction of the present invention.

[0025] Figure 6 It is a capacitor discharge voltage curve diagram of the magnetic steel coil wireless power supply method based on electromagnetic induction of the present invention.

[0026] Figure 7 It is a motion simulation analysis diagram of the magnetic steel coil wireless power supply method based on electromagnetic induction of the present invention.

[0027] Figure 8 It is a receiving coil voltage curve diagram of the magnetic steel coil wireless power supply method based on electromagnetic induction of the present invention.

[0028] Fig. 9 It is a capacitance charging curve diagram of the magnetic steel coil wireless power supply method based on electromagnetic induction of the present invention.

[0029] In the figure: an induction device 1, a receiving circuit 2, a receiving coil 3, a housing 11, a magnetic ring 12 and a buckle 13. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the examples and features in the examples in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with examples.

[0031] Example 1 Figure 3-9 As shown, the present invention provides a magnetic steel coil wireless power supply method based on electromagnetic induction, comprising:

[0032] Step S1: construct an electromagnetic induction device model according to the actual scenario, establish a cylindrical coordinate system of the magnetic ring model with set indicators, and obtain the magnetization amount of the magnetic ring by analytically calculating the magnetic field strength of the magnetic ring;

[0033] Preferably, obtaining the magnetization amount of the magnetic ring by analytically calculating the magnetic field strength of the magnetic ring includes: applying Maxwell's equations, based on the magnetic charge model and the scalar magnetic potential, solving the radial distance, azimuth and height along the center axis of the magnetic ring from the magnetic field strength at any point in space to the center axis of the magnetic ring.

[0034] Preferably, the cylindrical coordinate system of the magnetic ring model established by setting indicators includes: magnetic ring size parameters, receiving coil size and discharge time, and the magnetic field strength of the magnetic ring includes the radial distance, azimuth direction and altitude direction of the magnetic field strength.

[0035] The magnetic ring is a hollow permanent magnetic ring. The hollow permanent magnetic ring is equivalent to digging out a concentric magnet from the middle of a solid magnet. According to the superposition of magnetic field intensity vectors, the total magnetic field intensity at any point P in space is H(ρ,φ,h)=[(H ρ+ -H ρ- ) R -(H ρ+ -H ρ- ) r ]i+[(H φ+ -H φ- ) R -(H φ+ -H φ- ) r ]j+[(H h+ -H h- ) R -(H h+-H h- ) r ]k,

[0036] B=μr r HkDJ

[0037] The calculated magnetic induction intensity of the magnetic ring is greater than 0.55T, that is, the calculated magnetization amount is greater than 5500Gs, and it is verified and analyzed through subsequent electromagnetic simulation.

[0038] Where R is the outer diameter of the magnetic ring, and r is the inner diameter of the magnetic ring. H is the magnetic field intensity, H = F / qm0, F is the magnetic core of the test point, the force on qm0, H(ρ,φ,h) is the total magnetic field intensity vector of any point P in space, ρ is the radial distance from the point to the central axis of the permanent magnetic ring, ф is the azimuth of the point, h is the height of the point along the central axis of the permanent magnetic ring, Hρ is the radial component of the magnetic field intensity, Hφ is the azimuth component of the magnetic field intensity, Hh is the height component of the magnetic field intensity, i, j, k are unit vectors in the coordinate system, representing the radial, azimuth and height directions respectively, B is the magnetic induction intensity, μ r is the relative magnetic permeability.

[0039] Step S2: Select the parameters of the receiving coil structure according to the actual scenario, obtain the self-inductance value through the quality factor of the chaotic particle algorithm, and use the self-inductance value of the receiving coil and the coil resistance to calculate and obtain the parameter configuration of the receiving coil;

[0040] Preferably, obtaining the self-inductance value through the quality factor of the chaotic particle algorithm includes: (1) initializing the particle group: including the optimization variables of each particle; randomly generating each particle to represent a set of size parameters set for the receiving coil (defining the optimization variables: wire diameter, number of turns and winding height); (2) calculating the fitness: evaluating each individual particle, calculating the self-inductance value through the coil quality factor according to the self-inductance and resistance design of the spatial spiral coil, and obtaining the maximum Q-factor (quality factor) of the receiving coil parameters, that is, establishing the objective function to calculate the fitness; (3) updating the individual optimal and global optimal solutions: updating the optimal solution according to the particle size; (4) updating the optimal solution according to the particle size; (5) updating the optimal solution according to the particle size; (6) updating the optimal solution according to the particle size; (7) updating the optimal solution according to the particle size; (8) updating the optimal solution according to the particle size; (9) updating the optimal solution according to the particle size; (10) updating the optimal solution according to the particle size; (11) updating the optimal solution according to the particle size; (12) updating the optimal solution according to the particle size; (13) updating the optimal solution according to the particle size; (14) updating the optimal solution according to the particle size; (15) updating the optimal solution according to the particle size; (16) updating the optimal solution according to the particle size; (17) updating the optimal solution according to the particle size; (18) updating the optimal solution according to the particle size; (19) updating the optimal solution according to the particle size; (20) updating the optimal solution according to the particle size; (21) The fitness of the particle is evaluated. If the current fitness of the particle is better than the individual optimal fitness, the historical optimal position of each particle is updated; if the current fitness of the particle is better than the global optimal fitness, the global optimal position is updated; (4) Update the particle position: according to the individual optimal solution, the global optimal solution and the chaotic mapping sequence based on which the current particle swarm is initialized, the position of each particle is updated using the position update formula; (5) Repeat the steps of evaluating fitness, updating individual optimal and global optimal, and updating particle position until the stopping condition (such as the maximum number of iterations or fitness threshold) is met; and the global optimal solution is returned as the solution to the optimization problem.

[0041] Preferably, obtaining the parameter configuration of the receiving coil includes: determining the constraint conditions to be the physical size parameters and material properties of the receiving coil.

[0042] like Figure 3 The parameters of the receiving coil are calculated by the chaotic particle swarm optimization algorithm (CPSO) to obtain the parameter configuration of the receiving coil. Specifically, the parameter configuration is the optimal winding configuration of the receiving coil. The receiving coil is used as the receiving unit of the induced electromotive force, and its parameters have a significant impact on the system performance. Taking the quality factor of the coil as the optimization target, the outer diameter of the spatial spiral coil is 60mm. By modifying the wire diameter, number of turns and winding height of the receiving coil, the optimal parameter optimization is achieved. And according to the self-inductance of the spatial spiral coil and resistor Design, through coil quality factor Calculate the self-inductance value and get the receiving coil parameters. Where Q is the coil quality factor, ω is the angular frequency, L is the inductance of the coil, R is the equivalent series resistance of the coil, k is the coupling coefficient, μ is the magnetic permeability, N is the number of turns of the coil, S is the pitch, l is the coil length, ρ is the resistivity, and s is the cross-sectional area of ​​the coil.

[0043] Use the chaotic particle swarm optimization algorithm for optimization. The details are as follows: (1) Initialize the particle swarm: randomly generate a set of particle positions and velocities, each particle represents a set of dimensional parameters set by the receiving coil (define optimization variables: wire diameter, number of turns and winding height). (2) Calculate fitness: evaluate each individual particle and calculate the Q-factor of the coil parameters. (3) Update the individual optimal and global optimal solutions: update the historical optimal position and global optimal position of each particle according to the fitness of the particle. (4) Update particle position: update the position of each particle using the position update formula based on the individual optimal solution, the global optimal solution and the chaotic mapping sequence based on which the current particle swarm is initialized. (5) Iteration: repeat the above steps of evaluating fitness, updating individual optimal and global optimal, and updating position until the stopping condition (such as the maximum number of iterations or fitness threshold) is met. Output result: return the global optimal solution as the solution to the optimization problem. Chaotic Particle Swarm Optimization (CPSO) is a hybrid optimization algorithm that combines chaos theory and particle swarm optimization algorithm. It is a nonlinear dynamic device with high complexity and random properties. It uses the randomness and ergodicity of chaotic mapping to enhance the global search ability of particle swarm algorithm. By using chaotic mapping to generate random number sequences, it replaces the pseudo-random number sequences in traditional particle swarm algorithms, thereby increasing the randomness and diversity of the algorithm.

[0044] The receiving coil is made of copper wire with a wire diameter of 0.1 mm, with a total of 91 turns and a self-inductance of about 812 uH. The coil is wound on a plastic washer with parameters of an outer diameter of 60 mm, an inner diameter of 58 mm, and a height of 9.11 mm.

[0045] Step S3: assembling a receiving circuit structure for energy storage according to circuit design indicators, and calculating the capacitance value of the capacitor and the resistance value of the resistor in the receiving circuit;

[0046] Step S4: constructing a receiving circuit model in a simulation tool according to the receiving circuit structure, and performing a discharge simulation analysis on the receiving circuit after the receiving circuit is charged, observing the voltage level change and recording the power supply change curve, and verifying the receiving circuit model performance;

[0047] In order to verify whether the design of the power supply circuit meets the requirements, especially whether the capacitor can maintain a voltage level above 20V after a long period of discharge, a capacitor discharge simulation analysis is performed.

[0048] The discharge simulation of the receiving circuit model is implemented in the following steps:

[0049] like Figure 4 , build a circuit model in LTspice, use AC power supply, and charge the capacitor through a band. To simulate the fast charging process, such as Figure 5 As shown in the figure, the capacitor is charged to 27V within the 1ms band. After the 1ms charging process is completed, the power supply is disconnected and the receiving circuit enters the 2-minute natural discharge simulation stage to observe the voltage change of the capacitor. Figure 6 As shown in Figure 1, during the simulation, the voltage change curve of the capacitor during the entire discharge stage is recorded. Figure 5 and Figure 6 As can be seen in the figure, the capacitor is quickly charged to 27V in 40μs. During the next 120 seconds of natural discharge, the capacitor voltage gradually decreases, but always remains above 20V. This shows that the capacitor still retains a high voltage after a long discharge, proving the effectiveness of the power supply circuit design.

[0050] Step S5: Use a simulation tool to build an electromagnetic induction process model to simulate the relative movement of the receiving coil relative to the induction device during the movement process; verify the charging performance of the model;

[0051] Step S6: According to the motion parameters and output parameters of the induction device, the finite element method is used to simulate the distribution and change of the electromagnetic field, and the electromagnetic induction process model is simulated and verified. The method is verified to be able to charge quickly and maintain a stable voltage for a long time to meet the instantaneous power supply requirements.

[0052] The electromagnetic induction process simulation is realized by the following steps:

[0053] In order to accurately simulate the electromagnetic induction process during high-speed motion, the simulation tool Ansys Electronics Desktop is used to simulate the electromagnetic induction process. In the simulation environment, the induction device is placed in the band domain, and the speed movement of the induction device is set through the band domain. Figure 7 As shown in the figure, the receiving coil is fixed inside the fuze to simulate the relative movement of the receiving coil relative to the induction device during the actual launch of high-speed movement. The step size is set to 10μs in the simulation process to capture the instantaneous values ​​of the voltage and current of the coil during the movement. The specific step size is determined according to the set speed to ensure the timeliness and accuracy of the data. The simulation analysis uses the finite element method (FEM) to simulate the distribution and changes of the electromagnetic field. In the simulation, as the induction device moves, the induced electromotive force generated by the coil cutting the magnetic lines of force causes the voltage to change. Due to the limitations of the simulation software, the device is simplified to a fixed coil, and the entire induction device moves in a vertical direction relative to the coil at five different speeds.

[0054] The simulation settings are as follows:

[0055] 1) Motion setting: Although the coil moves at high speed in actual use, it is set to be fixed in the simulation. The sensing device moves vertically at speeds of 50m / s, 80m / s, 100m / s, 150m / s and 200m / s in the band domain to simulate relative motion during high-speed motion.

[0056] 2) Calculation parameters: During the simulation process, the voltage and current changes of the receiving coil at different time points are collected, and the charging voltage curve of the capacitor at different movement speeds is analyzed.

[0057] In the simulation, as the induction device moves, the induced electromotive force generated by the coil cutting the magnetic lines of force causes the voltage to change. When the coil passes through the magnetic field at different speeds, the simulated voltage induced by the coil is specifically expressed as follows: Figure 8 The simulation results show that the faster the movement speed, the higher the peak value of the induced electromotive force generated by the coil.

[0058] from Fig. 9 It can be seen that when the speed is 200m / s, the charging voltage of the capacitor is significantly higher than that of the low speed of 50m / s. The simulation results show that when the coil passes through the induction device, the change of magnetic flux is crucial to the generation of induced electromotive force. As the speed of movement increases, the rate of change of magnetic flux accelerates, resulting in a significant increase in the induced electromotive force. The simulation results show that, especially when the speed reaches 200m / s, the induced electromotive force in the receiving coil reaches its peak value, and the capacitor is quickly charged to more than 27V within 30μs. The results are consistent with Faraday's law of electromagnetic induction. Therefore, in actual design, the choice of coil movement speed will directly affect the energy acquisition efficiency of the fuze, which is also one of the factors that need to be considered in the design of the induction device.

[0059] The simulation analysis of the power supply circuit verifies the performance of the capacitor after rapid charging and long-term discharge. The simulation results show that the capacitor is quickly charged to more than 27V within 30μs, which indicates that the power supply circuit has a good fast charging capability and can provide sufficient energy reserve for the fuze in a short time.

[0060] The present invention also provides a magnetic steel coil wireless power supply device, such as Figure 1 As shown, it includes an induction device 1, a receiving coil 3 and a receiving circuit 2, wherein the receiving coil 3 is wound on a plastic gasket; the receiving circuit 2 is installed on the upper part of the receiving coil 3, and the induction device 1 is provided adjacent to the receiving coil 3 and the receiving circuit 2 on both sides, and the induction device 1 includes a magnetic ring 12, a shell 11 and a buckle 13, a magnetic ring 22 with a fixed position and direction is installed in the shell 11, and a buckle 13 for fixing the magnetic ring 12 is installed on the shell 11 ( Figure 2 ) to ensure the stability and directionality of the magnetic field. The magnetic ring is made of AlNiCo material, with outer diameter 83mm, inner diameter 64mm and height 50mm. The shell and buckle are made of aluminum alloy. The receiving circuit voltage meets ≥20V, the discharge time is greater than 120s, and the magnetization amount is higher than 5500Gs.

[0061] Preferably, Figure 4 , the receiving circuit includes a diode, a first capacitor, a second capacitor and a resistor, the anode of the diode is connected to one end of the receiving coil, and the other end of the receiving coil is grounded; the induced electromotive force generated by the coil is converted into direct current; the first capacitor, the second capacitor and the resistor are connected to form a parallel combination circuit, and the cathode of the diode is connected between the parallel combination circuit and the branch ground. The main function of the diode is rectification, and the rectified voltage directly acts on the parallel combination circuit. Specifically, the capacitors C1 and C2 in the receiving circuit are 47μF, and the resistor R is 100KΩ.

[0062] Preferably, before the receiving circuit is charged, the method includes: setting a band of the capacitor electromotive force within a predetermined time.

[0063] Preferably, the magnetic steel coil wireless power supply device adopts the following steps: when the receiving coil passes through the induction device at high speed, the receiving coil moves in the magnetic field provided by the induction device, and uses the change of magnetic flux to induce electromotive force, which acts on the receiving circuit, and the receiving coil provides electrical energy to the receiving circuit. The device realizes non-contact energy transmission through the change of magnetic field to ensure that the receiving circuit obtains the required electrical energy instantly.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A magnetic steel coil wireless power supply method based on electromagnetic induction, characterized in that: include: Construct an electromagnetic induction device model according to the actual scenario, establish the cylindrical coordinate system of the magnetic ring model with the set indicators, and obtain the magnetization amount of the magnetic ring by analytically calculating the magnetic field strength of the magnetic ring; The parameters of the receiving coil structure are selected according to the actual scenario, the self-inductance value is obtained through the quality factor of the chaotic particle algorithm, and the parameter configuration of the receiving coil is obtained by calculating the self-inductance value of the receiving coil and the coil resistance; Assemble a receiving circuit for energy storage according to circuit design specifications, and calculate the capacitance and resistance of the capacitor in the receiving circuit; According to the receiving circuit structure, a receiving circuit model is constructed in the simulation tool, and a discharge simulation analysis is performed on the receiving circuit after the receiving circuit is charged, the voltage change is observed and the power supply change curve is recorded to verify the performance of the receiving circuit model; Use simulation tools to build an electromagnetic induction process model to simulate the relative movement of the receiving coil relative to the induction device during the movement process; verify the charging performance; According to the motion parameters and output parameters of the induction device, the finite element method is used to simulate the distribution and change of the electromagnetic field, and the electromagnetic induction process model is simulated and verified.

2. The magnetic steel coil wireless power supply method based on electromagnetic induction according to claim 1 is characterized in that: The magnetization amount of the magnetic ring is obtained by analytically calculating the magnetic field strength of the magnetic ring, including: solving the radial distance, azimuth and height along the central axis of the permanent magnetic ring from the magnetic field strength of any point in space to the central axis of the permanent magnetic ring according to the magnetic charge model and the scalar magnetic potential.

3. The magnetic steel coil wireless power supply method based on electromagnetic induction according to claim 1 is characterized in that: The cylindrical coordinate system for establishing the magnetic ring model using the set indicators includes: magnetic ring parameter size, receiving coil size and discharge time.

4. The magnetic steel coil wireless power supply method based on electromagnetic induction according to claim 1 is characterized in that: The method of obtaining the self-inductance value through the quality factor of the chaotic particle algorithm includes: (1) initializing the particle group: including the optimization variables of each particle; randomly generating each particle to represent a set of size parameters set by the receiving coil; (2) calculating the fitness: evaluating each individual particle, calculating the self-inductance value through the coil quality factor according to the self-inductance and resistance design of the spatial spiral coil, and obtaining the maximized quality factor of the receiving coil parameters; (3) updating the individual optimal and global optimal solutions: according to the fitness of the particle, if the current fitness of the particle is better than the individual optimal fitness, then updating the historical optimal position of each particle; if the current fitness of the particle is better than the global optimal fitness, then updating the global optimal position; (4) updating the particle position: according to the individual optimal solution, the global optimal solution and the chaotic mapping sequence based on which the current particle group is initialized, using the position update formula to update the position of each particle; (5) repeating the steps of evaluating the fitness, updating the individual optimal and global optimal and updating the particle position until the stopping condition is met; returning the global optimal solution as the solution to the optimization problem.

5. The magnetic steel coil wireless power supply method based on electromagnetic induction according to claim 4 is characterized in that: The obtaining of the parameter configuration of the receiving coil includes: determining that the constraint conditions are the physical size and material properties of the receiving coil.

6. The magnetic steel coil wireless power supply method based on electromagnetic induction according to claim 1 is characterized in that: The receiving circuit includes a diode, a first capacitor, a second capacitor and a resistor. The anode of the diode is connected to one end of the receiving coil, and the other end of the receiving coil is grounded. The induced electromotive force generated by the coil is converted into direct current. The first capacitor, the second capacitor and the resistor are connected to form a parallel combination circuit, and the cathode of the diode is connected between the parallel combination circuit and the branch ground.

7. The magnetic steel coil wireless power supply method based on electromagnetic induction according to claim 1 is characterized in that: The method of performing discharge simulation analysis on the receiving circuit after the receiving circuit is charged includes: setting a band of the capacitor electromotive force within a predetermined time.

8. A magnetic steel coil wireless power supply device based on electromagnetic induction, comprising an induction device (1), a receiving coil (3) and a receiving circuit (2), characterized in that: The receiving coil (3) is wound on a plastic washer; a receiving circuit (2) is installed on the upper part of the receiving coil (3); an induction device (1) is provided adjacent to both sides of the receiving coil (3) and the receiving circuit (2); the induction device comprises a housing (11), a magnetic ring (12) and a buckle (13); a magnetic ring (12) with a fixed position and direction is installed in the housing (11); and a buckle (13) for fixing the magnetic ring (12) is installed on the housing (11).

Images