Wireless power supply system with variable rotation gain magnetic integrated resonance compensation and manufacturing method

Abstract

The present application relates to magnetic coupling resonance type wireless power transmission technology, and particularly to a variable rotation gain magnetic integrated resonance compensation wireless power supply system and method, the system comprising a power transmitting module unit and a power receiving module unit, adopting a magnetic integrated resonance compensation topology structure to realize gain-adjustable external wireless power supply output; the coil design of the compensation inductance magnetic integration to the receiving or transmitting coil is completed, the coupling coefficient of the receiving or transmitting coil and the corresponding integrated compensation coil is reduced, the overall transmission efficiency of the system is improved, and the gain adjustable range is increased; only three capacitors and a magnetic compensation inductance constitute a resonance topology network, the system output gain can be changed without changing the coil parameters, thereby realizing an output customized wireless power supply system, and the three compensation capacitors only need to be changed to adjust the wide range gain, which is more convenient, practical and economical.

Description

Technical Field

[0001] This invention belongs to the field of magnetically coupled resonant wireless power transmission technology, and specifically relates to a wireless power supply system and manufacturing method with variable gyration gain magnetic integrated resonant compensation. Background Technology

[0002] Over the past decade, wireless power transfer technology has become a research hotspot in the field of power electronics due to its convenience, safety, and flexibility. Among various wireless power transfer methods, magnetically coupled resonant wireless power transfer uses more compact power electronic devices, has lower maintenance costs, higher reliability, and can provide more flexible power supply. It has achieved phased success in related research and commercial applications. The main research areas of magnetically coupled resonant wireless power transfer include compensation characteristic analysis and topology design, coupling coil optimization, control technology, and electromagnetic safety. Among these, compensation analysis and design play a leading role because it causes circuit resonance, affects the input power factor and transmission efficiency, and determines the output characteristics of the wireless power transfer system. Currently, the main research focuses on four basic second-order compensation networks: S / S, S / P, P / S, and P / P. Because the value of the tuning capacitor depends on the load and the coupling coefficient between the receiving and transmitting coils, and because it requires high current regulation, the application of P / S and P / P compensation is greatly limited. S / S and S / P compensation, on the other hand, avoid these drawbacks and have been discovered and applied in numerous studies. Second-order compensation offers advantages such as simple topology and few components. However, the gain of wireless power transfer systems based on second-order compensation is limited by the loosely coupled transformer. Once the loosely coupled transformer is determined, the gain or output characteristics of the wireless power transfer system cannot be changed. Due to the lack of design freedom for compensation, it is difficult to customize the output for different application scenarios without changing the expensive and space-constrained loosely coupled transformer. Currently, wireless charging technology is developing rapidly, but the output voltage or current gain of traditional wireless power transfer systems based on second-order compensation is closely related to the transmitting and receiving coils. Since the transmitting and receiving coils are difficult to change after design, changing the output gain of traditional wireless power transfer systems requires the addition of an additional DC-DC converter, increasing the overall system size, significantly increasing costs, and decreasing stability, making it difficult to adapt to the needs of different scenarios. Summary of the Invention

[0003] To address the problems existing in the background technology, the present invention provides an economical, practical, convenient, fast, safe and efficient customized wireless power supply system that can meet the requirement of adjustable output gain through circuit topology without changing the coupling transformer.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a customized wireless power supply system with variable slew rate gain magnetic integrated resonant compensation, comprising a power transmission functional unit and a power receiving functional unit; the power transmission functional unit comprises: a DC power supply, a primary-side drive circuit, a high-frequency full-bridge inverter, a primary-side resonant compensation network, and a transmitting coil connected in sequence; the power receiving unit comprises a receiving coil, a secondary-side resonant compensation network, a rectifier and voltage regulator circuit, a load, a current sensor, and a wireless communication control device connected in sequence; the wireless communication control device comprises a communication control module, a PI control, and a PWM drive circuit connected in sequence; the PWM drive circuit is connected to the primary-side drive circuit.

[0005] In the aforementioned customized wireless power supply system with variable gyration gain magnetic integrated resonant compensation, the primary-side resonant compensation network and the secondary-side resonant compensation network include either an A-side resonant compensation circuit or a B-side resonant compensation circuit. The A-side resonant compensation circuit uses parallel capacitor compensation on the primary side and high-order CCL compensation on the secondary side, including the primary-side tuning capacitor C. P-A Secondary side first tuning capacitor C A-A and the second tuning capacitor C on the secondary side S-A Secondary side compensation inductor L S The B resonant compensation circuit is configured with high-order CCL compensation on the primary side and parallel capacitor compensation on the secondary side, including the first tuning capacitor C on the primary side. P-B and the second tuning capacitor C on the primary side A-B Secondary tuning capacitor C S-B Primary-side compensating inductor L g .

[0006] In the above-mentioned customized wireless power supply system with variable gyration gain magnetic integrated resonant compensation, the number of turns of the transmitting coil or receiving coil is obtained by simulation software, a planar spiral design is adopted, and the compensation inductor is integrated into the transmitting coil or receiving coil.

[0007] In the aforementioned customized wireless power supply system with variable slew rate gain magnetic integrated resonant compensation, configuration A employs a secondary-side compensation inductor L. S The secondary integrated coil is integrated with the receiving coil. The transmitting coil is larger than the receiving coil, and the inner and outer radii of the transmitting and receiving coils are modulated to create a stable coupling region. The secondary integrated coil includes the receiving coil, ferrite, and secondary compensation inductor L. S ;

[0008] The secondary integrated coil includes an inner winding and an outer winding. The inner winding is located in the unconducted area at the center of the receiving coil, while the outer winding is located in the unconducted area at the edge of the receiving coil. The current directions of the inner winding and the outer winding are opposite.

[0009] In the aforementioned customized wireless power supply system with variable slew rate gain magnetic integrated resonant compensation, configuration B uses primary-side compensation inductor L. g The primary-side integrated coil is integrated with the transmitting coil, the receiving coil is larger than the transmitting coil, and the inner and outer radii of the receiving and transmitting coils are modulated to create a stable coupling region; the primary-side integrated coil includes the transmitting coil, ferrite, and primary-side compensating inductor L. g ;

[0010] The primary-side integrated coil includes an inner winding and an outer winding. The inner winding is located in the unconducted area at the center of the transmitting coil, while the outer winding is located in the unconducted area at the edge of the transmitting coil. The current directions of the inner winding and the outer winding are opposite.

[0011] A method for fabricating a customized wireless power supply system with variable gyration gain magnetic integrated resonant compensation, comprising the following steps:

[0012] The size, height, and operating frequency of the receiving coil are given according to the requirements, and the receiving coil is obtained according to the application conditions of the wireless power transmission system.

[0013] Select the receiving coil parameters, construct the transmitting and receiving coils, and measure the self-inductance and mutual inductance of the primary and secondary sides.

[0014] Compensation for inductor parameters is designed through simulation;

[0015] Determine whether the parameters of the compensation inductor meet the requirements;

[0016] If not, then the inductor parameters will be compensated through simulation design.

[0017] If so, select the tuning capacitor calculation formula based on the coil parameters and power supply scenario requirements;

[0018] Calculate the primary and secondary tuning capacitors based on the required gain and operating frequency.

[0019] In the above-mentioned method for manufacturing a customized wireless power supply system with variable gyration gain magnetic integrated resonant compensation, the methods for manufacturing the receiving coil and the transmitting coil include:

[0020] Select the resonant network compensation method based on the actual application scenario and analyze the coupling mode of the compensation inductor;

[0021] The parameters of the primary or secondary compensation inductor are scanned using ANSYS simulation software to determine whether decoupling has been completed. If the parameters match, these parameters are imported into CAD, the corresponding model is printed, and the coil support of the corresponding mold is manufactured.

[0022] The final magnetically integrated decoupled coil is obtained by winding Litz wire on a coil support.

[0023] In the above method for manufacturing a customized wireless power supply system with variable gyration gain magnetic integrated resonant compensation, the formula for calculating the tuning capacitor is:

[0024] 1) Calculation formula for compensation method A:

[0025] The formula for calculating output gain is as follows:

[0026]

[0027]

[0028] The formula for calculating the tuning capacitor is:

[0029]

[0030]

[0031] In the formula, G A This configures the output gain of A, L g To compensate for inductance, M Pg-A For the coupling mutual inductance between the transmitter and the integrated terminal, M PS-A For the coupling mutual inductance between the transmitter and receiver, M Sg-A For the coupling mutual inductance between the receiving end and the integration end, C P-A C A-A and C S-A To configure the three tuning capacitors in A;

[0032] 2) Calculation formula for compensation method B:

[0033] The formula for calculating output gain is as follows:

[0034]

[0035]

[0036] The formula for calculating the tuning capacitor is:

[0037]

[0038]

[0039] In the formula, G B It configures the output gain of B, L f To compensate for inductance, M Pg-B For the coupling mutual inductance between the transmitter and the integrated terminal, M Sf-B For the coupling mutual inductance between the receiving end and the integration end, M Pf-B For the coupling mutual inductance between the transmitter and the integrated terminal, C P-B C A-B and C S-BConfigure the three tuning capacitors in B.

[0040] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention proposes a novel wireless power transmission topology structure, which uses only a resonant topology network composed of three capacitors and one compensating inductor to change the system output gain without changing the coil parameters, thereby realizing a customized wireless power supply system. The entire device design is more convenient and more economical and practical than traditional wireless charging devices.

[0041] The compensating inductor is integrated into the receiving coil or transmitting coil and decoupled through appropriate design, which reduces the size of the device, makes better use of the magnetic field, and improves the charging efficiency of the system.

[0042] For specific gain power output requirements, after selecting the resonant compensation network structure, the specific parameters of the three inductors and one capacitor in the resonant compensation network are calculated using two formulas. The parameters calculated by these two formulas have different transmission efficiencies under large and small loads, which can meet the power supply requirements of different types of loads in different scenarios and have strong environmental adaptability.

[0043] This invention relates to a customized wireless power supply system based on variable gyroscopic gain magnetically integrated resonant compensation. The output constant current gain is adjusted by modifying a resonant topology network consisting of three capacitors and a magnetically compensated inductor. Compared to the traditional S / S second-order topology, this system offers greater freedom and is more convenient and faster. In its design, the compensation inductor is magnetically integrated into the receiving coil, reducing the device size and improving cost-effectiveness. Furthermore, the elimination of cross-coupling enhances system transmission efficiency. The passive components of the resonant network within the entire device have two sets of parameter selections. These two formulas calculate parameters with different transmission efficiencies under heavy and light loads, meeting power supply requirements in various scenarios and demonstrating strong environmental adaptability. Attached Figure Description

[0044] Figure 1 This is a module connection diagram according to an embodiment of the present invention;

[0045] Figure 2(a) is an equivalent circuit model of the magnetic integration configuration A in an embodiment of the present invention;

[0046] Figure 2(b) is the equivalent circuit model of the secondary magnetic integration after demagnetization of configuration A in an embodiment of the present invention;

[0047] Figure 3(a) is the equivalent circuit model of the primary-side magnetic integration configuration B in an embodiment of the present invention;

[0048] Figure 3(b) is the equivalent circuit model of the primary-side magnetic integration after demagnetization of configuration B in an embodiment of the present invention;

[0049] Figure 4(a) is an equivalent circuit diagram of the passive device parameters in the resonant network of an embodiment of the present invention;

[0050] Figure 4(b) is a T-type equivalent circuit diagram of the passive device parameters in the resonant network of an embodiment of the present invention;

[0051] Figure 5(a) is a top view of the wireless power transmission coil structure according to an embodiment of the present invention;

[0052] Figure 5(b) is a cross-sectional view of the wireless power transmission coil structure according to an embodiment of the present invention;

[0053] Figure 6 This is a flowchart of the passive device design in an embodiment of the present invention. Detailed Implementation

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0055] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0056] The present invention will be further described below with reference to specific embodiments, but these are not intended to limit the scope of the invention.

[0057] This embodiment proposes a wireless power supply variable gyroscopic gain magnetic integrated resonant topology and output customization method. The entire device adopts a magnetic integrated resonant compensation topology to achieve adjustable gain external wireless power supply output. A novel wireless power transmission topology is proposed, which uses only a resonant topology network composed of three capacitors and one compensation inductor. The system output gain can be changed without changing the coil parameters, thereby realizing a customized wireless power supply system. The coil design of magnetically integrating the compensation inductor into the receiving or transmitting coil is completed, which reduces the coupling coefficient between the receiving or transmitting coil and the compensation coil, improves the overall transmission efficiency of the system, and increases the adjustable gain range. Compared with traditional second-order S / S, third-order S / PS, or SP / S topologies, it can achieve wide-range gain adjustment by changing the three compensation capacitors without redesigning the coil, which is more convenient, practical, and economical.

[0058] This embodiment is achieved through the following technical solution: a customized wireless power supply system based on variable gyroscopic gain magnetic integrated resonant compensation, including a power transmission functional unit and a power receiving functional unit.

[0059] The power transmission unit includes: a DC power supply, a drive circuit, a high-frequency full-bridge inverter, a transmitting coil, and a primary-side resonant compensation network.

[0060] The power receiving unit includes a receiving coil, a secondary resonant compensation network, a rectifier and voltage regulator circuit, a current sensor, and a wireless communication control device.

[0061] DC power module: Provides DC power, which is the energy source for the entire wireless power transmission system. It also provides a constant power supply to the drive circuit module to ensure the normal operation of the drive circuit.

[0062] Drive circuit module: Drives the MOSFET devices in the high-frequency full-bridge inverter based on the signal generated by the signal generator.

[0063] High-frequency full-bridge inverter module: Converts DC power into high-frequency AC power with the same frequency as the signal generator through a full-bridge inverter circuit.

[0064] Transmitting coil: It forms a circuit with the primary side resonant compensation network to transmit high-frequency AC power to the subsequent module units.

[0065] Primary-side resonant compensation network: A resonant network composed of passive electronic components generates a high-frequency resonant current on the primary side, thereby generating a high-frequency magnetic field on the transmitting coil.

[0066] Receiving coil: Used to receive magnetic resonance signals. After forming a resonant circuit with the secondary resonant compensation network, it receives the energy emitted by the power transmission module and generates high-frequency alternating current with the same frequency as the power transmission unit.

[0067] Secondary-side resonant compensation network: A resonant network composed of passive electronic components that generates high-frequency resonant current on the secondary side.

[0068] Rectifier and voltage regulator circuit module: The high-frequency AC power in the receiving coil is rectified into DC power by a rectifier circuit composed of diodes, and a large capacitor is installed on the output port to ensure that the charging voltage ripple fluctuation is less than the required fluctuation.

[0069] Current sensor: A device for detecting load current.

[0070] Wireless communication control device: transmits the current signal detected by the current sensor to the primary-side drive circuit module.

[0071] In specific implementation, such as Figure 1As shown, the output customized wireless power supply system with variable slew gain magnetic integrated resonant compensation includes a power transmission unit and a power receiving unit. The power transmission unit includes, in sequence, a DC power supply, a primary-side drive circuit, a high-frequency full-bridge inverter, a primary-side resonant compensation network, and a transmitting coil. The power receiving unit includes, in sequence, a receiving coil, a secondary-side resonant compensation network, a rectifier and voltage regulator circuit, a load, a current sensor, and a wireless communication control device. The wireless communication control device includes, in sequence, a communication control module, a PI control circuit, and a PWM drive circuit. The PWM drive circuit is connected to the primary-side drive circuit.

[0072] DC power module: Provides DC power, which is the energy source for the entire wireless power transmission system. It also provides a constant power supply to the drive circuit module to ensure the normal operation of the drive circuit.

[0073] Primary-side drive circuit: Drives the MOSFET devices in the high-frequency full-bridge inverter based on the signal generated by the signal generator.

[0074] High-frequency full-bridge inverter module: Converts DC power into high-frequency AC power with the same frequency as the signal generator through a full-bridge inverter circuit.

[0075] Transmitting coil: It forms a circuit with the primary side resonant compensation network to transmit high-frequency AC power to the subsequent module units.

[0076] Primary-side resonant compensation network: A resonant network composed of passive electronic components generates a high-frequency resonant current on the primary side, thereby generating a high-frequency magnetic field on the transmitting coil.

[0077] Receiving coil: Used to receive magnetic resonance signals. After forming a resonant circuit with the secondary resonant compensation network, it receives the energy emitted by the power transmission module and generates high-frequency alternating current with the same frequency as the power transmission unit.

[0078] Secondary-side resonant compensation network: A resonant network composed of passive electronic components that generates high-frequency resonant current on the secondary side.

[0079] Rectifier and voltage regulator circuit module: The high-frequency AC power in the receiving coil is rectified into DC power by a rectifier circuit composed of diodes, and a large capacitor is installed on the output port to ensure that the charging voltage ripple fluctuation is less than the required fluctuation.

[0080] Current sensor: A device for detecting load current.

[0081] Wireless communication control device: transmits the current signal detected by the current sensor to the primary-side drive circuit.

[0082] The primary-side resonant compensation network and the secondary-side resonant compensation network include either an A-side resonant compensation circuit or a B-side resonant compensation circuit. The A-side resonant compensation circuit uses parallel capacitor compensation on the primary side and higher-order CCL compensation on the secondary side, including the primary-side tuning capacitor C. P-A Secondary tuning capacitor C A-A and C S-A Secondary side compensation inductor L S The B-side resonant compensation circuit is configured with high-order CCL compensation on the primary side and parallel capacitor compensation on the secondary side, including the primary-side tuning capacitor C. P-B and C A-B Secondary tuning capacitor C S-B Primary-side compensating inductor L g .

[0083] The system works as follows: The PWM drive circuit emits a high-frequency PWM wave to drive the high-frequency inverter circuit. The DC power module converts the DC power into AC power with the same frequency as the PWM wave through the high-frequency inverter circuit. Then, through the primary side resonant compensation network circuit, a very high-frequency current is generated, thus creating a high-frequency alternating magnetic field. On the receiving coil, according to Faraday's law of electromagnetic induction, a current of the same frequency is generated, thereby transferring energy from the primary side to the secondary side. The secondary side AC power is then output through a rectifier and voltage regulator circuit to power the load. The current on the load is detected by a current sensor and transmitted to the PI controller via the communication control module to change the duty cycle of the PWM wave, thereby maintaining a constant current value.

[0084] The primary-side resonant compensation network and the secondary-side resonant compensation network include either configuration A resonant compensation circuit or configuration B resonant compensation circuit; configuration A resonant compensation circuit uses parallel capacitor compensation on the primary side and high-order CCL compensation on the secondary side, including primary-side tuning capacitor C. P-A Secondary side first tuning capacitor C A-A and the second tuning capacitor C on the secondary side S-A Secondary side compensation inductor L S The B resonant compensation circuit is configured with high-order CCL compensation on the primary side and parallel capacitor compensation on the secondary side, including the first tuning capacitor C on the primary side. P-B and the second tuning capacitor C on the primary side A-B Secondary tuning capacitor C S-B Primary-side compensating inductor L g .

[0085] The circuit topology of this embodiment is shown in Figures 2(a), 2(b), 3(a), and 3(b), where Figure 2(a) is the equivalent circuit model of the secondary-side magnetic integration of configuration A; Figure 2(b) is the equivalent circuit model of the secondary-side magnetic integration after demagnetization of configuration A. Figure 3(a) is the equivalent circuit model of the primary-side magnetic integration of configuration B, and Figure 3(b) is the equivalent circuit model of the primary-side magnetic integration after demagnetization of configuration B; U in the figures P It is high-frequency alternating current obtained from a DC power supply through an inverter circuit, R L It is the AC equivalent resistance of the load.

[0086] The equivalent circuit diagram for calculating the passive device parameters in the resonant network in this embodiment is shown in Figure 4(a) (taking configuration A as an example). In the topology shown in Figure 2(b), because the design of the compensation inductor completes the secondary side decoupling, the circuit diagram in Figure 2(b) can be equivalent to the equivalent circuit shown in Figure 4(a). Based on the decoupling principle and star-delta transformation, the T-type equivalent circuit shown in Figure 4(b) can be obtained, and the output gain calculation formula can be obtained:

[0087]

[0088]

[0089] In the formula, G A This configures the output gain of A, L g To compensate for inductance, M Pg-A For the coupling mutual inductance between the transmitter and the integrated terminal, M PS-A For the coupling mutual inductance between the transmitter and receiver, M Sg-A For the coupling mutual inductance between the receiving end and the integration end, C P-A C A-A and C S-A To configure the three tuning capacitors in A.

[0090] Similarly, based on the parameter information marked in the circuit diagrams of Figures 3(a) and 3(b), the formula for calculating the gain of configuration B is as follows:

[0091]

[0092]

[0093] In the formula, G B It configures the output gain of B, L f To compensate for inductance, M Pg-B For the coupling mutual inductance between the transmitter and the integrated terminal, M Sf-B For the coupling mutual inductance between the receiving end and the integration end, M Pf-B For the coupling mutual inductance between the transmitter and the integrated terminal, C P-B C A-B and CS-B Configure the three tuning capacitors in B.

[0094] According to the T-type equivalent circuit shown in Figure 4(b), the passive capacitor A needs to meet the resonance condition of the resonant network. The calculation formula is as follows:

[0095]

[0096]

[0097] Similarly, configuring passive capacitor B requires satisfying the resonance condition of the resonant network, and the calculation formula is as follows:

[0098]

[0099]

[0100] In this embodiment, the determination of the coil is first based on the actual application scenario to select the resonant network compensation method and analyze the coupling mode of the compensation inductor. Then, the ANSYS simulation software is used to scan the compensation inductor parameters to determine whether decoupling has been completed. If the parameters match, these parameters are imported into CAD, the corresponding model is printed, the coil support of the corresponding mold is manufactured, and Litz wire is used to wind on the coil support to obtain the final magnetically integrated decoupled coil.

[0101] A top view of the wireless power transfer coil structure is shown in Figure 5(a). Taking configuration A as an example, the compensating inductor is integrated with the receiving coil. The transmitting coil is larger than the receiving coil, and the inner and outer radii of the transmitting and receiving coils are modulated to generate a larger stable coupling region. The secondary integrated coil consists of the receiving coil, ferrite, and compensating inductor coil, as shown in Figure 5(b). The upper part of Figure 5(b) is the xy cross-sectional view, and the lower part is the yz cross-sectional view.

[0102] The integrated compensation inductor coil includes an inner winding and an outer winding. The inner winding is located in the unconducted area at the center of the receiving coil, while the outer winding is mainly located in the unconducted area at the edge of the receiving coil. This improves the space utilization of the secondary integrated coil and reduces its size. Simultaneously, the current directions of the inner and outer windings of the integrated compensation inductor coil are opposite to achieve control of the coupling between the receiving coil and the compensation inductor. This allows it to adjust α and reduce the mutual inductance between the coils integrated on one side. From the above gain calculation formula, it can be seen that in M... Sg-A Or M Pg-B With the participation of [the system], the adjustable gain range will increase, and the mutual inductance between the coils integrated on one side will be reduced to a smaller value to improve the overall system efficiency.

[0103] The number of turns in the inner and outer coils of the compensating inductor is obtained through simulation software. The appropriate number of turns is determined by adjusting parameters in the finite element method software until the mutual inductance between the transmitting coil and the compensating inductor coil, and between the receiving coil and the compensating inductor coil, is within the desired range or near the desired value. The entire magnetically integrated coil adopts a planar spiral design, integrating the compensating inductor onto the receiving coil, reducing the size of the receiving end and equipment, and improving the utilization rate of ferrite.

[0104] The parameter design process in this embodiment is as follows: Figure 6 As shown, firstly, based on the power supply scenario requirements, the size of the receiving coil, the wireless power transmission distance, and the operating frequency are given. Then, the receiving coil is obtained according to the application conditions of the wireless power transmission system. Using the already designed receiving coil parameters with a certain tolerance for deviation, the transmitting and receiving coils are established. At this point, it is necessary to measure the self-inductance of the transmitting and receiving coils and their mutual inductance. The compensation inductance parameters are designed through simulation. If the integrated parameters match the requirements, proceed to the next step; otherwise, return to the previous step and recalculate. After obtaining the compensation inductance parameters, a lower-loss capacitor calculation formula needs to be selected based on the coil parameters and power supply scenario requirements. Then, based on the previously given operating frequency and required gain value, the primary-side capacitor, secondary-side capacitor, and compensation capacitor parameters are calculated.

[0105] This embodiment presents a customized wireless power supply system based on variable gyro gain magnetically integrated resonant compensation. The output constant current gain is adjusted by modifying a resonant topology network consisting of three capacitors and a compensating inductor. Compared to the traditional S / S second-order topology, this system offers greater freedom and is more convenient and faster. In its design, the compensating inductor is magnetically integrated into the receiving coil, reducing the device size and improving cost-effectiveness. Furthermore, the elimination of cross-coupling enhances system transmission efficiency. The passive components of the resonant network within the entire device have two sets of parameter selections. These two formulas calculate parameters with different transmission efficiencies under heavy and light loads, meeting power supply requirements in various scenarios and demonstrating strong environmental adaptability.

[0106] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the content of this specification should be included within the protection scope of the present invention.

Claims

1. A method for fabricating a customized wireless power supply system with variable gyration gain magnetic integrated resonant compensation, the wireless power supply system comprising a power transmission unit and a power reception unit; the power transmission unit includes: The DC power supply, primary-side drive circuit, high-frequency full-bridge inverter, primary-side resonant compensation network, and transmitting coil are connected in sequence; the power receiving unit includes the receiving coil, secondary-side resonant compensation network, rectifier and voltage regulator circuit, load, current sensor, and wireless communication control device connected in sequence; the wireless communication control device includes the communication control module, PI control, and PWM drive circuit connected in sequence. The PWM drive circuit is connected to the primary-side drive circuit; the primary-side resonant compensation network and the secondary-side resonant compensation network include either a configuration A resonant compensation circuit or a configuration B resonant compensation circuit; the configuration A resonant compensation circuit uses parallel capacitor compensation on the primary side and high-order CCL compensation on the secondary side, including a primary-side tuning capacitor. C P-A Secondary side first tuning capacitor C A-A and the second tuning capacitor on the secondary side C S-A Secondary side compensation inductor L S The B-side resonant compensation circuit is configured with high-order CCL compensation on the primary side and parallel capacitor compensation on the secondary side, including the first tuning capacitor on the primary side. C P-B and the second tuning capacitor on the primary side C A-B Secondary tuning capacitor C S-B Primary-side compensating inductor L g Its characteristics are, This method includes: the calculation formula for the A-compensation method of tuning capacitor configuration: The formula for calculating output gain is as follows: The formula for calculating the tuning capacitor is: In the formula, G A This configures the output gain of A. L g To compensate for inductance, M Pg-A For the coupling mutual inductance between the transmitting end and the integration end, M PS-A For the coupling mutual inductance between the transmitter and receiver, M Sg-A For the coupling mutual inductance between the receiving end and the integration end, C P-A , C A-A and C S-A To configure the three tuning capacitors in A.

2. The method for manufacturing a customized wireless power supply system with variable gyration gain magnetic integrated resonant compensation according to claim 1, characterized in that, Given the required size, height, and operating frequency of the receiving coil, and then obtaining the receiving coil based on the application conditions of the wireless power transmission system; selecting the receiving coil parameters, fabricating the transmitting and receiving coils, and measuring the self-inductance and mutual inductance of the primary and secondary sides; and designing compensation inductance parameters through simulation. Determine whether the parameters of the compensation inductor meet the requirements; If not, then the inductor parameters will be compensated through simulation design. If so, select the tuning capacitor calculation formula based on the coil parameters and power supply scenario requirements; calculate the tuning capacitors of the primary and secondary sides based on the required gain value and operating frequency.

3. The method for manufacturing a customized wireless power supply system with variable gyration gain magnetic integrated resonant compensation according to claim 1, characterized in that, The number of turns of the transmitting or receiving coil is obtained by simulation software. A planar spiral design is adopted, and the compensation inductor is integrated into the transmitting or receiving coil.

4. The method for manufacturing a customized wireless power supply system with variable gyration gain magnetic integrated resonant compensation according to claim 1, characterized in that, Configuration A uses a secondary-side compensating inductor. L S The secondary integrated coil is integrated with the receiving coil. The transmitting coil is larger than the receiving coil, and the inner and outer radii of the transmitting and receiving coils are modulated to create a stable coupling region. The secondary integrated coil includes the receiving coil, ferrite, and secondary compensation inductor. L S ; The secondary integrated coil includes an inner winding and an outer winding. The inner winding is located in the unconducted area at the center of the receiving coil, while the outer winding is located in the unconducted area at the edge of the receiving coil. The current directions of the inner winding and the outer winding are opposite.

5. The method for manufacturing a customized wireless power supply system with variable gyration gain magnetic integrated resonant compensation according to claim 1, characterized in that, Configuration B uses a primary-side compensating inductor. L g The primary-side integrated coil is integrated with the transmitting coil, the receiving coil is larger than the transmitting coil, and the inner and outer radii of the receiving and transmitting coils are modulated to create a stable coupling region; the primary-side integrated coil includes the transmitting coil, ferrite, and primary-side compensating inductor. L g ; The primary-side integrated coil includes an inner winding and an outer winding. The inner winding is located in the unconducted area at the center of the transmitting coil, while the outer winding is located in the unconducted area at the edge of the transmitting coil. The current directions of the inner winding and the outer winding are opposite.

6. The method for manufacturing a customized wireless power supply system with variable gyration gain magnetic integrated resonant compensation according to claim 1, characterized in that, Methods for making receiving and transmitting coils include: Select the resonant network compensation method based on the actual application scenario and analyze the coupling mode of the compensation inductor; The parameters of the primary or secondary compensation inductor are scanned using ANSYS simulation software to determine whether decoupling has been completed. If the parameters match, these parameters are imported into CAD, the corresponding model is printed, and the coil support of the corresponding mold is manufactured. The final magnetically integrated decoupling coil is obtained by winding Litz wire on a coil support.

7. The method for manufacturing a customized wireless power supply system with variable gyration gain magnetic integrated resonant compensation according to claim 1, characterized in that, The calculation formula for tuning capacitor configuration B compensation method: The formula for calculating output gain is as follows: The formula for calculating the tuning capacitor is: In the formula, G B It configures the output gain of B. L f To compensate for inductance, M Pg-B For the coupling mutual inductance between the transmitting end and the integration end, M Sf-B For the coupling mutual inductance between the receiving end and the integration end, M Pf-B For the coupling mutual inductance between the transmitting end and the integration end, C P-B , C A-B and C S-B Configure the three tuning capacitors in B.

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