Universal generalized electric field coupler model
By introducing a generalized electric field coupler model with primary-side equivalent capacitance, controlled source module, and secondary-side equivalent capacitance, the problem of insufficient degree of freedom in adjusting the parameters of the electric field coupler model is solved. This achieves structural generalization and flexible parameter adjustment, simplifies the system design process, and improves design efficiency and applicability.
Patent Information
- Application Number
- CN202510908071.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-02
- Publication Date
- 2025-11-18
AI Technical Summary
Existing electric field coupler models lack the degree of freedom to adjust parameters without changing the physical structure, which leads to increased system design complexity and decreased power density, making them difficult to apply in space-constrained environments.
A generalized electric field coupler model is adopted, and the equivalent capacitance of the primary side, the controlled source module, and the equivalent capacitance of the secondary side are introduced. The parameters are fully adjustable through the parameters of the controlled source module, and a model with a generalized structure is constructed.
Without altering the physical structure, it provides additional design freedom, reduces system design complexity, and improves system design efficiency and flexibility, making it suitable for electric field couplers with various structural forms.
Smart Images
Figure CN120979009A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to wireless power transmission technology, and particularly discloses a general-purpose generalized electric field coupler model, belonging to the technical field of power generation, power transformation or power distribution. BACKGROUND
[0002] The electric field coupling type wireless power transmission system realizes non-contact transmission of energy through an electric field coupling mode, and has no electrical or mechanical connection between the power supply end and the power receiving end, and has the advantages of simple structure, low cost, light weight, and no eddy current loss. In recent years, with the continuous improvement of transmission stability and efficiency, this technology has been widely concerned and rapidly developed in the fields of unmanned aerial vehicles, electric slip rings, underwater autonomous vehicles, and consumer electronics.
[0003] The existing electric field coupler adopts a parallel or stacked plate structure, and can be equivalent to a six-capacitor network model. In order to improve the power transmission capacity and transmission efficiency of the system, the reactive power in the system needs to be compensated through a compensation network. In engineering design, the six-capacitor model is further equivalent to a T-type or Π-type equivalent circuit model to simplify the analysis and design process of the compensation network.
[0004] However, the values of the parameters in the T-type and Π-type equivalent models are determined by the structure of the coupler, and lack of adjustment freedom, making it difficult to achieve flexible control of the output gain without changing the physical structure. Therefore, in order to increase the system freedom, a more complex compensation network or adjustment of the coupler plate size and layout is needed. This not only increases the complexity and hardware redundancy of the system design, but also leads to an increase in system size and weight, a decrease in power density, and limits its practical application in space-limited occasions such as slip rings and small unmanned aerial vehicles. SUMMARY
[0005] The present application aims to overcome the shortcomings of the above background technology, and proposes a general-purpose generalized electric field coupler model. The model introduces a controlled source module into the generalized modeling structure, and is based on the primary equivalent capacitor, the secondary equivalent capacitor and the controlled source module to achieve the purpose of generalizing the model structure and fully adjusting the parameters of the electric field coupler. Thus, additional design freedom can be introduced without changing the physical structure, effectively reducing the complexity of system design, and solving the technical problems of lack of freedom in parameter design of existing electric field coupler models, and the need to change the physical structure to introduce additional design freedom, increase system complexity and reduce system power density.
[0006] The present application adopts the following technical solutions to achieve the above-mentioned purposes:
[0007] A generalized electric field coupler model includes: a primary-side equivalent capacitance module, a controlled source module, and a secondary-side equivalent capacitance module. The primary-side equivalent capacitance module represents the equivalent capacitance element that generates reactive power on the controlled current side. The controlled source module is used to transfer the energy received on its controlled current side to its controlled voltage side. The voltage-current relationship of the controlled source module is represented by the parameters of the controlled source module, which include generalized electric field coupler parameters used to adjust the parameters of the primary-side and secondary-side equivalent capacitance modules. The secondary-side equivalent capacitance module represents the equivalent capacitance element that generates reactive power on the controlled voltage side.
[0008] As a further optimization of the generalized electric field coupler model, the primary-side equivalent capacitance module includes: a first primary-side equivalent capacitance element and a second primary-side equivalent capacitance element; the first terminal of the first primary-side equivalent capacitance element and the second terminal of the second primary-side equivalent capacitance element constitute the input terminal of the primary-side equivalent capacitance module, and the second terminal of the first primary-side equivalent capacitance element is connected to the first terminal of the second primary-side equivalent capacitance element; the first terminal and the second terminal of the second primary-side equivalent capacitance element constitute the output terminal of the primary-side equivalent capacitance module.
[0009] As a further optimization of the generalized electric field coupler model, the controlled power supply module includes: a controlled current source and a controlled voltage source; the controlled current source has its first and second terminals forming the controlled current side, which is connected to the output terminal of the primary-side equivalent capacitance module; the controlled voltage source has its first and second terminals forming the controlled voltage side, and the voltage-current relationship of the controlled power supply module, expressed by the parameters of the controlled power supply module, is as follows: Where i1 is the input current of the controlled source module, v1 is the input voltage of the controlled source module, i2 is the output current of the controlled source module, v2 is the output voltage of the controlled source module, and n C For parameters of the controlled source module, α is a parameter of the generalized electric field coupler, with a value of (-∞, 0)∪(0, +∞). C1 is the equivalent self-capacitance of the primary side of the electric field coupler, and C2 is the equivalent self-capacitance of the secondary side of the electric field coupler.
[0010] As a further optimization of the generalized generalized electric field coupler model, the secondary-side equivalent capacitor module includes a secondary-side equivalent capacitor. The first terminal of the secondary-side equivalent capacitor is connected to the first terminal of the controlled voltage source, and the second terminal of the secondary-side equivalent capacitor and the second terminal of the controlled voltage source constitute the output terminal of the generalized generalized electric field coupler model.
[0011] As a further optimization scheme for the generalized electric field coupler model, the parameters of the controlled source module are determined based on the target gain of the electric field-coupled wireless power transfer converter, and then by... Seek Ultimately based on Find the first primary-side equivalent capacitance element C. PC, a second primary side equivalent capacitor element C MC and a secondary side equivalent capacitor element C SC parameters, wherein k C is a coupling coefficient of the electric field coupler, C M is an equivalent mutual capacitance of the electric field coupler.
[0012] The present application has the following beneficial effects by adopting the above technical solution:
[0013] (1) The present application proposes a general-purpose generalized electric field coupler model, which adopts a controlled source structure with adjustable voltage-current variable ratio composed of a controlled current source and a controlled voltage source, and introduces adjustable equivalent capacitors on the primary side and the secondary side, and has the characteristics of unified structure and flexible parameter adjustment.
[0014] (2) The general-purpose generalized electric field coupler model proposed by the present application is suitable for electric field couplers of various structural forms such as parallel type and stacked type, and can realize arbitrary adjustment of model parameters without changing the physical structure of the coupler, and has good structural universality and expansibility.
[0015] (3) The model constructed by the present application can provide a unified modeling basis for electric field coupling wireless power transmission systems, which helps to simplify the system modeling and topology design process and improve the system design efficiency and flexibility. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application or the prior art. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without creative labor.
[0017] Figure 1 The general-purpose generalized electric field coupler model proposed by the present application.
[0018] Figure 2 The general-purpose generalized electric field coupler model simulation circuit principle diagram provided in the embodiment of the present application.
[0019] Figure 3 The electric field coupler Π type equivalent model circuit simulation circuit principle diagram provided in the embodiment of the present application.
[0020] Figure 4 The simulation waveform of the electric field coupler Π type equivalent model provided in the embodiment of the present application.
[0021] Figure 5 The simulation waveform when α is 0.5 provided in the embodiment of the present application.
[0022] Figure 6 Simulation waveform when α is 1 in the embodiment of the present application.
[0023] Figure 7 Simulation waveform when α is 2 in the embodiment of the present application.
[0024] Figure label explanation: n C is a controlled source module parameter, i1 is a controlled source module input current, v1 is a controlled source module input voltage, i2 is a controlled source module output current, v2 is a controlled source module output voltage, C PC is a first primary side equivalent capacitor element, C MC is a second primary side equivalent capacitor element, C SC is a secondary side equivalent capacitor element, v IN is a high-frequency alternating current source with a working frequency of ω, i IN is an input current of an electric field coupler equivalent model, v O is an output voltage of an electric field coupler equivalent model, i O is an output current of an electric field coupler equivalent model, C1 is a primary side equivalent self-capacitance of an electric field coupler, C2 is a secondary side equivalent self-capacitance of an electric field coupler, C M is an equivalent mutual-capacitance of an electric field coupler, R O is an alternating current load. DETAILED DESCRIPTION
[0025] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.
[0026] The universal generalized electric field coupler model structure provided by the present application is shown in Figure 1 , which is composed of a primary side equivalent capacitor module, a controlled source module, and a secondary side equivalent capacitor module. The primary side equivalent capacitor module is used to represent equivalent capacitor elements that generate no function energy on the controlled current side. The controlled source module transmits electric energy from the controlled current side of the controlled source to the controlled voltage side of the controlled source and expresses the voltage-current variable ratio relationship of input and output. The secondary side equivalent capacitor module is used to represent equivalent capacitor elements that generate no function energy on the controlled voltage side. The related parameters of all modules can be adjusted.
[0027] As shown in Figure 1 , the primary side equivalent capacitor module in the universal generalized electric field coupler model includes a first primary side equivalent capacitor element C PC , a second primary side equivalent capacitor element C MC , the first primary side equivalent capacitor element C PCthe first end of the first primary-side equivalent capacitor element C MC the second end of the first primary-side equivalent capacitor element C MC the first end of the first primary-side equivalent capacitor element C PC the second end of the first primary-side equivalent capacitor element C MC the first end of the first primary-side equivalent capacitor element C
[0028] As shown in Figure 1 , the controlled source module in the universal generalized electric field coupler model includes a controlled current source and a controlled voltage source, the first end and the second end of the controlled current source constitute the controlled current side of the controlled source module, the first end and the second end of the controlled voltage source constitute the controlled voltage side of the controlled source module, the first end of the controlled current source is connected to the second end of the first primary-side equivalent capacitor element C PC , and the second end of the controlled current source is connected to the second end of the second primary-side equivalent capacitor element C MC . The secondary-side equivalent capacitor module includes a secondary-side equivalent capacitor element C SC , the first end of the secondary-side equivalent capacitor element C SC is connected to the first end of the controlled voltage source, and the second end of the secondary-side equivalent capacitor element C SC and the second end of the controlled voltage source constitute the output end of the universal generalized electric field coupler model.
[0029] The simulation circuit schematic diagram of the universal generalized electric field coupler model is shown in Figure 2 , the input end of the universal generalized electric field coupler model is connected to a high-frequency alternating current source v IN with a working frequency of ω, and the output end of the universal generalized electric field coupler model is connected to an alternating current load R O . Among them, the high-frequency alternating current source v IN supplies power to the universal generalized electric field coupler model, and the electric energy is transmitted to the controlled source module after generating reactive power by the primary-side equivalent capacitor module, and the electric energy is transmitted to the controlled voltage side by the controlled source module, and the energy is transmitted to the alternating current load R O after generating reactive power by the secondary-side equivalent capacitor module. The parameters contained in the primary-side equivalent capacitor module, the controlled source module and the secondary-side equivalent capacitor module can be adjusted, which provides additional design freedom.
[0030] The simulation circuit schematic diagram of the electric field coupler Π type equivalent model is shown in Figure 3 , the input end of the electric field coupler Π type equivalent model is connected to a high-frequency alternating current source v IN with a working frequency of ω, and the output end of the electric field coupler Π type equivalent model is connected to an alternating current load R O . Among them, the high-frequency alternating current source v INThe electric field coupler Π type equivalent model is supplied with power, and the electric energy is transmitted to the AC load R through the electric field coupler Π type equivalent model to generate reactive power O The parameters in the electric field coupler Π type equivalent model are determined by the parameters of the electric field coupler.
[0031] It can be seen that the universal generalized electric field coupler model and the electric field coupler Π type equivalent model have the same transmission characteristics and the same two-port transmission matrix, and the parameters of the universal generalized electric field coupler model can be obtained by writing equations according to the same column of the two-port transmission matrix.
[0032] The parameters of the universal generalized electric field coupler model are , wherein n C is the parameter of the controlled source module, the voltage-current relationship of the controlled source module is , i1 is the input current of the controlled source module, v1 is the input voltage of the controlled source module, i2 is the output current of the controlled source module, v2 is the output voltage of the controlled source module, C1 is the equivalent self-capacitance of the primary side of the electric field coupler, C2 is the equivalent self-capacitance of the secondary side of the electric field coupler, alpha is the parameter of the universal generalized electric field coupler, alpha takes the value of (-∞, 0)∪(0, +∞), when alpha takes the value of 0, the controlled source module will not be able to transmit energy, C PC is the capacitance value of the first primary side equivalent capacitor element, C MC is the capacitance value of the second primary side equivalent capacitor element, C SC is the capacitance value of the secondary side equivalent capacitor element, k C is the coupling coefficient of the electric field coupler, k C is expressed as , C M is the equivalent mutual capacitance of the electric field coupler.
[0033] Since the output gain of the electric field coupling type wireless electric energy transmission converter designed by using the universal generalized electric field coupler model is a function of the parameter n C of the controlled source module, the voltage-current variable ratio n C of the controlled source module in the universal generalized electric field coupler model can be obtained according to the required gain of the electric field coupling type wireless electric energy transmission converter, alpha can be obtained according to n C , and the first primary side equivalent capacitor element C PC , the second primary side equivalent capacitor element C MC , and the secondary side equivalent capacitor element C SC are adjustable by adjusting alpha.
[0034] The following is an example of designing based on the parameters of the universal generalized electric field coupler model with the parameters in Table 1, and the specific steps are as follows:
[0035] Table 1 Example parameters
[0036]
[0037] Step 1: Assuming that n C = 0.5, 1, 2, respectively, according to α is obtained as 0.5, 1, 2, respectively;
[0038] Step 2: According to α, the first primary equivalent capacitor element C PC , the second primary equivalent capacitor element C MC , and the secondary equivalent capacitor element C SC are determined, and the calculation formula is .
[0039] The calculation results are shown in Table 2:
[0040] Table 2: Calculation parameters of the general type generalized electric field coupler model
[0041]
[0042] The positive value of the equivalent capacitor in Table 2 indicates the generation of capacitive reactive power, and the negative value indicates the generation of inductive reactive power. The effect of the general type generalized electric field coupler model proposed in the present application will be verified below in combination with the simulation results.
[0043] According to the parameters in Table 1 and Table 2, the general type generalized electric field coupler model is simulated and verified, and is compared with the Π type equivalent model of the electric field coupler. The simulation waveforms of the Π type equivalent model of the electric field coupler are shown in Figure 4 , and the simulation waveforms of the input voltage v IN , the input current i IN , the output voltage v O , and the output current i O are obtained. In the case of α = 0.5, 1, and 2, the simulation is performed respectively, and the simulation waveforms of the input voltage v IN , the input current i IN , the output voltage v O , the output current i O , the input voltage v1 of the controlled source module, and the output voltage v2 of the controlled source module of the general type generalized electric field coupler model are shown in Figures 5 to 7 . Figure 4It can be seen that the input voltage amplitude of the electric field coupler Π type equivalent model is 48V, the input current amplitude is 0.27A, the output voltage amplitude is 5.39V, and the output current amplitude is 0.27A. When α is 0.5, the input voltage amplitude is 48V, the input current amplitude is 0.27A, the output voltage amplitude is 5.39V, the output current amplitude is 0.27A, the input voltage amplitude of the controlled source module is 2185V, and the output voltage amplitude of the controlled source module is 1092.5V. When α is 1, the input voltage amplitude is 48V, the input current amplitude is 0.27A, the output voltage amplitude is 5.39V, the output current amplitude is 0.27A, the input voltage amplitude of the controlled source module is 24.3V, and the output voltage amplitude of the controlled source module is 24.3V. When α is 2, the input voltage amplitude is 48V, the input current amplitude is 0.27A, the output voltage amplitude is 5.39V, the output current amplitude is 0.27A, the input voltage amplitude of the controlled source module is 1056V, and the output voltage amplitude of the controlled source module is 2112V. It can be seen that the input voltage, input current, output voltage and output current of the universal type generalized electric field coupler model are the same as those of the Π type equivalent model, regardless of the value of α. In addition, the voltage-current variable ratio relationship of the controlled source module changes with α and does not affect the transmission characteristics of the universal type generalized electric field coupler model. The above simulation results prove that the present application achieves the expected effect and verifies the effectiveness and feasibility of the universal type generalized electric field coupler model structure proposed.
[0044] The technical solutions disclosed in the present application scheme are not limited to the examples disclosed in the above embodiments, but also include technical solutions formed by any combination of the technical features disclosed in the above embodiments. It should be noted that, for those skilled in the art, without departing from the principles of the present application, several improvements and refinements can be made, and these improvements and refinements are also considered within the protection scope of the present application.
Claims
1. A generic model of a generalized electric field coupler, characterized by, Comprise: a primary side equivalent capacitor module for representing an equivalent capacitor element generating no function energy at a controlled current side; a controlled source module for transmitting energy received at its controlled current side to its controlled voltage side, representing a voltage current relationship of the controlled source module by a controlled source module parameter, the controlled source module parameter comprising a universal generalized electric field coupler parameter for adjusting a primary side equivalent capacitor module parameter and a secondary side equivalent capacitor module parameter; and, a secondary side equivalent capacitor module for representing an equivalent capacitor element generating no function energy at the controlled voltage side.
2. The universal generalized electric field coupler model of claim 1, wherein, The primary side equivalent capacitor module comprises: a first primary side equivalent capacitor element, a first end of which and a second end of a second primary side equivalent capacitor element constitute a primary side equivalent capacitor module input end, a second end of which is connected to a first end of the second primary side equivalent capacitor element; and a second primary side equivalent capacitor element, a first end of which and a second end of which constitute a primary side equivalent capacitor module output end.
3. The universal generalized electric field coupler model of claim 2, wherein, The controlled source module comprises: a controlled current source, a first end of which and a second end of which constitute a controlled current side, the controlled current side being connected to the primary side equivalent capacitor module output end; and A controlled voltage source, the first end and the second end constitute a controlled voltage side, the voltage current relationship of the controlled source module represented by the controlled source module parameter is Wherein, i1 is the input current of the controlled source module, v1 is the input voltage of the controlled source module, i2 is the output current of the controlled source module, v2 is the output voltage of the controlled source module, n C Is the controlled source module parameter, , α is the parameter of the universal type generalized electric field coupler, α takes the value of (-∞, 0)∪(0, +∞), C1 is the equivalent self-capacitance of the primary side of the electric field coupler, and C2 is the equivalent self-capacitance of the secondary side of the electric field coupler.
4. The universal generalized electric field coupler model of claim 3, wherein, The secondary side equivalent capacitor module comprises a secondary side equivalent capacitor, a first end of which is connected to a first end of the controlled voltage source, a second end of the secondary side equivalent capacitor and a second end of the controlled voltage source constituting a universal generalized electric field coupler model output end.
5. The universal generalized electric field coupler model of claim 4, wherein, The parameters of the controlled source module are determined based on the target gain of the electric field-coupled wireless power transfer converter, and then by... Seeking Ultimately based on Find the first primary-side equivalent capacitance element C. PC The second primary-side equivalent capacitance element C MC and the secondary equivalent capacitance element C SC The parameters, , where k C The coupling coefficient of the electric field coupler is... C M This is the equivalent mutual capacitance of the electric field coupler.