Modular radio power system with injection-synchronized RF generator

Abstract

The wireless power system includes a magnetic resonant wireless power supply with multiple coupled LC resonators, each driven by a separate radio frequency (RF) generator. The system is modular, allowing for the addition, removal, or rearrangement of resonators. Each RF generator is configured to sense the phase of other RF generators and adjust its own phase to maintain a constant phase difference. Each RF generator includes a Class E amplifier driven by an injection-synchronous oscillator and a low-pass filter that outputs a current sine wave. This RF generator senses the phase of the RF current of other RF generators via an induced voltage and adjusts its own phase based on the combined voltage derived from the voltage and current signals. The system maintains frequency synchronization even in the event of environmental disturbances by adjusting a variable capacitor.

Description

Technical Field

[0001] Cross - Reference to Related Applications This application claims the benefit and priority of U.S. Provisional Patent Application No. 63 / 486,957, filed on February 24, 2023, "Modular Radio Power Supply Composed of Injection - Synchronized High - Frequency Generators", the content of which is incorporated herein by reference in its entirety.

[0002] This disclosure generally relates to wireless power transfer technology, and more particularly to systems, methods, and devices for wireless power transfer using modular resonators driven by independent high - frequency generators.

Background Art

[0003] Wireless power transfer is a technology that transmits electrical energy from a power source to an electrical load without using conductors or wiring. This technology is based on the principle of electromagnetic induction, where a current flowing through a coil generates a magnetic field, which induces an electromotive force in a nearby coil. Then, this induced voltage can be used to drive electrical devices.

[0004] Some types of wireless power transfer systems utilize magnetic resonance, which involves the use of resonant circuits. These circuits include inductors and capacitors and are often referred to as LC resonators. The resonant frequency of these circuits is determined by the values of the inductor and capacitor.

Summary of the Invention

[0005] This summary is provided to introduce, in a simplified form, some concepts that are further described in the detailed description below. This summary is not intended to identify key features or essential features of the claimed invention, nor is it intended to be used as an aid in determining the scope of the claimed invention.

[0006] According to one aspect of the present disclosure, a wireless power system includes a magnetic resonant wireless power source having a plurality of coupled LC resonators. Each resonator is driven by a separate radio frequency (RF) generator. Each RF generator is configured to sense the phase of the other RF generators and adjust its own phase to maintain a constant phase difference between itself and the other RF generators. The system is modular, and each resonator can be added, removed, or moved to a different location.

[0007] Depending on other aspects of this disclosure, the radio power system may include one or more of the following characteristics: Each RF generator may include a Class E amplifier driven by an injection-synchronous oscillator. Each RF generator may further include a low-pass filter configured to output a sinusoidal current of substantially constant amplitude. Each RF generator may be configured to detect the phase of the RF current of other RF generators via an induced voltage detected by this low-pass filter. Each RF generator may include a variable capacitor at the output terminal of the RF generator, controlled to maintain a consistent reactance.

[0008] Each RF generator may be configured to adjust its phase based on a total voltage derived from a voltage signal and a current signal, where the voltage signal and the current signal are each multiplied by a gain coefficient. Each RF generator may be configured to maintain frequency synchronization even in the presence of environmental disturbances by adjusting a variable capacitor. According to another aspect of the present disclosure, the radio power system comprises a plurality of radio frequency (RF) generators, each RF generator connected to a separate LC resonator in a magnetic resonance radio power source.

[0009] Each RF generator is configured to sense the RF current of other RF generators via the mutual inductance between their resonators, and to use this sensed current to frequency-synchronize the RF generators. The system is modular, and each resonator can be added, removed, or moved to a different location. According to other aspects of this disclosure, the radio power system may include one or more of the following features: Each RF generator may include a Class E amplifier driven by an injection-synchronous oscillator.

[0010] Each RF generator may further include a low-pass filter configured to output a sinusoidal current of approximately constant amplitude. Each RF generator may be configured to detect the phase of the RF current of other RF generators via an induced voltage detected by the low-pass filter. Each RF generator may include a variable capacitor at the output terminal of the RF generator, controlled to maintain a consistent reactance.

[0011] Each RF generator is configured to adjust its phase based on the sum of voltages derived from a voltage signal and a current signal, where the voltage signal and the current signal are each multiplied by a gain coefficient. Each RF generator may be configured to maintain frequency synchronization even in the event of environmental deviations by adjusting a variable capacitor.

[0012] The general description of the embodiments described above and the detailed description below are merely illustrative aspects of the teachings of this disclosure and are not limiting. [Brief explanation of the drawing]

[0013] Many aspects of this disclosure can be better understood by referring to the following drawings. The components in the drawings are not necessarily to scale, and the emphasis is on clearly illustrating the principles of the disclosure. Furthermore, in the drawings, the same reference numerals indicate corresponding parts across multiple drawings.

[0014] Figure 1 is a schematic diagram of a modular radio power system comprising a plurality of RF generators equipped with coupled resonant magnetic loop antennas, according to an aspect of the present disclosure.

[0015] Figure 2 is a schematic diagram showing an RF generator in a modular radio power system according to an aspect of the present disclosure, characterized by an injection-synchronous Class E configuration.

[0016] Figure 3 shows an impedance mirroring low-pass filter configuration used in an RF generator according to an aspect of this disclosure.

[0017] Figure 4 shows a simplified schematic diagram of an injection-synchronous oscillator circuit used in an RF generator according to an embodiment of the present disclosure.

[0018] Figure 5 is a graph showing the phase shift with respect to frequency deviation of an injection-synchronous oscillator, according to an embodiment of this disclosure.

[0019] Figure 6 is a graph showing the relationship between DC power and frequency deviation for an RF generator, according to an aspect of this disclosure.

[0020] Figure 7 is a photographic diagram of a test apparatus for a modular wireless power system, according to an aspect of this disclosure, showing wireless power transmission to an LED load.

[0021] Figure 8 shows a photographic diagram of an experimental setup with two drive resonators in a modular wireless power system, according to an aspect of the present disclosure, where each resonator is wirelessly coupled to an LED load.

[0022] Figure 9 shows a series of graphs illustrating the performance characteristics of the modular wireless power system with respect to DC power consumption and phase difference, in accordance with aspects of this disclosure.

[0023] Figure 10 shows a graph representing power transmission as a function of the phase difference between two resonators in the modular wireless power system, according to an aspect of this disclosure. [Modes for carrying out the invention]

[0024] The present disclosure relates to systems, methods, and devices that facilitate wireless power transfer via a modular resonator driven by an injection-synchronized radio frequency (RF) generator. In some applications, it is desirable to have a wireless power system that can adapt to various environments and geometries. This can be achieved using a modular wireless power source. Related art has included the design of magnetic resonance wireless power systems employing modular self-tuning repeaters that can be coupled to each other to extend the wireless power zone of a driving resonator. However, in some systems of the related art, increasing the number of repeaters resulted in a decrease in the maximum supply power during stable operation. This limitation might be avoided if each module incorporated its own RF power source. For maximum flexibility, it is desirable for each module to include an independent RF generator, such that each module requires only a DC power source and no external RF connections.

[0025] To prevent the generation of beat frequencies in powering a receiver coupled to multiple resonators, frequency synchronization of the RF generators is essential. In the prior art, a wireless power source was composed of a single near-field magnetic loop antenna that included multiple serially-connected RF generators. The RF current within this loop was used as a common signal to injection-synchronize the RF generators and to ensure that they all operated at the same frequency and phase. When the RF generators are connected to separate resonators, different problems arise. In this case, since there is no direct connection between the systems, the systems cannot share a common signal for injection synchronization. Thus, various embodiments are described herein in which each resonator is allowed to detect other RF currents via their mutual inductance, and this signal is used to injection-synchronize the RF generators.

[0026] Thus, various embodiments are described for a modular radio power source, where each module includes a corresponding radio frequency (RF) generator. However, to prevent interference between modules, it is often desirable for the RF generators to be frequency synchronized, i.e., operating at the same frequency. For this reason, as described later, the RF generators described herein are capable of frequency synchronization for interference prevention.

[0027] Referring to the drawings, FIG. 1 is a schematic diagram of a modular radio power system. The system includes a plurality of radio frequency (RF) generators, each generator being connected to a separate LC resonator within a magnetic resonance wireless power source. In some embodiments, the first resonator includes a voltage source V1, a capacitor C1, an inductor L1, a resistor R1, and a current I1 flowing through them. Similarly, the second resonator includes a voltage source V2, a capacitor C2, an inductor L2, a resistor R2, and a current I2. The second resonator is coupled to the first resonator via a mutual inductance M12. The third resonator is composed of a voltage source V3, a capacitor C3, an inductor L3, a resistor R3, and a current I3. The third resonator may have mutual inductances M13 and M23 between the first resonator and the second resonator, respectively.

[0028] In various embodiments, the mutual inductances M12, M13, and M23 represent wireless coupling between the resonators and enable the transmission of power and phase information. This transmission is used to frequency synchronize the RF generators associated with each resonator. Each RF generator may be configured to detect the RF current of other RF generators via the mutual inductance between the resonators and use this detected current to frequency synchronize the RF generator.

[0029] This system is modular, allowing each resonator to be added, removed, or moved, making it possible to include resonators other than those shown (e.g., a fourth resonator, a fifth resonator, etc.). This modularity provides flexibility to adapt the radio power zone to various environments and shapes, particularly in the context of variable-size and variable-dimension radio power transmission domains. In several aspects, the RF generator can automatically adjust the resonators to accommodate fluctuations in mutual coupling, and can automatically synchronize frequencies to prevent the generation of beat frequencies in power supply to receivers coupled to multiple resonators.

[0030] Adding, removing, or moving resonators affects the mutual inductance M between resonator pairs. nm This can cause a change. To accommodate this change, in some embodiments, a capacitor C n The phase is variable, and each RF generator is controlled to recognize a consistent reactance at its output terminal. Assume that each RF generator is connected to a DC power supply but does not have a direct RF connection to an external source. To frequency synchronize the RF generators, each RF generator may be configured to sense the phase of other generators and adjust its phase to maintain a constant phase difference between itself and the others.

[0031] Referring to Figure 2, a schematic diagram of a modular radio-power system with injection-synchronous Class E RF generators is shown. In some embodiments, each RF generator in the system may include a Class E amplifier driven by an injection-synchronous oscillator. The Class E amplifier is configured to convert a DC input into an AC output at a desired frequency, while the injection-synchronous oscillator may be configured to generate a stable frequency signal that can be adjusted based on the input signal.

[0032] In various embodiments, each RF generator further includes low-pass filters such as a first low-pass filter LPF1, a second low-pass filter LPF2, or a third low-pass filter LPF3, which are configured to output a continuous sine wave with a nearly constant amplitude. These low-pass filters are designed to remove harmonics by allowing frequencies below the cutoff frequency to pass while attenuating frequencies above the cutoff frequency. This can contribute to reducing noise and interference in the output signal of the RF generator.

[0033] In some embodiments, each RF generator may be configured to detect the phase of the RF current of other RF generators via an induced voltage detected by a low-pass filter. For example, the first resonator current I1, the second resonator current I2, or the third resonator current I3 may be detected via their respective low-pass filters. This detected current is used to adjust the phase of the RF generators, thereby enabling frequency synchronization between the RF generators.

[0034] In some embodiments, each RF generator includes a variable capacitor, such as a first resonator capacitor C1, a second resonator capacitor C2, or a third resonator capacitor C3, which is controlled or configured to maintain a consistent reactance at the output terminal of the RF generator. The variable capacitor is adjusted based on the phase of the detected RF current, thereby enabling the RF generator to maintain a consistent reactance despite changes in the intercoupling between the resonators.

[0035] In various embodiments, each RF generator is configured to adjust its phase based on a combined voltage derived from a voltage signal and a current signal, where the voltage signal and the current signal may, in some implementations, be multiplied by their respective gain coefficients. This combined voltage is used as an input to an injection-synchronous oscillator, which allows the RF generator to adjust its phase and maintain frequency synchronization with other RF generators.

[0036] In some embodiments, each RF generator may be configured to maintain frequency synchronization even when environmental deviations occur by adjusting a variable capacitor. This allows the RF generator to maintain a stable frequency despite environmental changes such as temperature and humidity changes or the presence of interference signals.

[0037] Figure 3 shows an impedance mirroring low-pass filter configuration using an inductor L and a capacitor C, configured to match the input impedance Zin to the output impedance Z. This configuration can be used in the low-pass filter of an RF generator to ensure that the impedance of the input signal matches the impedance of the output signal, thereby maximizing power transmission and minimizing signal distortion.

[0038] Referring to Figure 4, a simplified circuit diagram of an injection-synchronous oscillator circuit is shown. In some aspects, the injection-synchronous oscillator circuit includes a phase inversion stage, a limiting stage, an attenuation stage, an adding stage, a crystal filter, and another limiting stage, which are arranged sequentially from the input to the output of the circuit. The phase inversion stage, labeled "-1" in Figure 4, may be located on the input side of the circuit. Thus, in some embodiments, the phase inversion stage may be configured to selectively invert the phase of the input signal. This selective phase inversion affects the phase relationship between injection-synchronous RF generators in the system and provides flexibility in phase adjustment control of the RF generators.

[0039] A limiting stage may be included in the circuit following the phase inversion stage. This limiting stage is configured to limit the amplitude of the input signal to a predetermined level, thereby preventing signal distortion and damage to subsequent stages of the circuit due to excessively high signal amplitudes. In some embodiments, the limiting stage converts the sine wave to a square wave to facilitate further signal processing within the circuit.

[0040] Next, the circuit may contain an attenuation stage, indicated by the letter "a" in Figure 4. The attenuation stage may be configured to reduce the signal amplitude from the limiting stage by a predetermined factor. This attenuation can contribute to signal power control within the circuit, prevention of signal overload, and ensuring stable operation of the circuit.

[0041] An addition stage may be incorporated into the circuit after the attenuation stage. The addition stage is configured to combine multiple input signals into a single output signal. This is useful when the RF generator is designed to detect and adjust the phase based on multiple input signals, such as voltage or current signals.

[0042] A crystal filter may be incorporated into the circuit after the summing stage. This crystal filter is configured to remove unwanted frequencies from the summed signal, allowing only signals of a predetermined frequency or frequency range to pass through. This ensures that the RF generator operates at a predetermined frequency regardless of fluctuations in the input signal or environmental conditions, contributing to the maintenance of the RF generator's frequency stability.

[0043] Finally, it is possible to place another limiting stage on the output side of the circuit. Similar to the first limiting stage, this limiting stage limits the amplitude of the output signal to a predetermined level, ensuring that the output signal of the injection-synchronous oscillator circuit is within the desired amplitude range. In various embodiments, this limiting stage can also convert the sine wave to a square wave, providing a square wave output signal from the injection-synchronous oscillator circuit.

[0044] In some embodiments, as described above, injection-synchronous oscillator circuits can be part of an RF generator in a modular radio power system. An injection-synchronous oscillator circuit may be configured to generate a stable, adjustable frequency signal based on an input signal, such as a combined voltage derived from a voltage signal and a current signal. This allows the RF generator to adjust its phase and maintain frequency synchronization with other RF generators in the system, facilitating efficient and stable radio power transmission within the system.

[0045] Referring to Figures 5-6, a series of graphs related to a modular radio-power system with an injection-synchronous RF generator are shown. Figure 5 is a graph plotting the phase shift in degrees against the frequency deviation from the center frequency of 6.78 MHz. This graph, in one aspect, shows the phase response characteristics of the injection-synchronous oscillator. The phase shift may represent the phase difference between the input and output of the injection-synchronous oscillator. The frequency deviation may represent the difference between the actual operating frequency of the oscillator and the center frequency of 6.78 MHz. This graph may show the operating performance of the RF generator in terms of phase stability over a frequency range.

[0046] In various embodiments, the phase shift changes proportionally to the frequency deviation, exhibiting a linear phase response of the injection-synchronous oscillator. In some embodiments, the phase shift changes nonlinearly with respect to the frequency deviation, exhibiting a nonlinear phase response of the injection-synchronous oscillator. The specific relationship between the phase shift and the frequency deviation may depend on various factors, such as the design of the injection-synchronous oscillator, the operating conditions of the RF generator, and the mutual coupling between the resonators.

[0047] Figure 6 shows a graph plotting frequency deviation from the same center frequency of 6.78 MHz on the horizontal axis and DC power (in watts) on the vertical axis. This graph compares the power characteristics of a single system with those of the left and right RF generators in a modular system. DC power represents the power consumed by the RF generator, and frequency deviation represents the difference between the actual operating frequency of the RF generator and the center frequency of 6.78 MHz. This graph shows the operating performance of the RF generator in terms of power consumption over a wide range of frequencies.

[0048] In some respects, DC power increases with increasing frequency deviation, indicating a positive correlation between power consumption and frequency deviation. In other respects, DC power decreases with increasing frequency deviation, indicating a negative correlation between power consumption and frequency deviation. The specific relationship between DC power and frequency deviation can depend on various factors, including the RF generator design, operating conditions, and the coupling between resonators.

[0049] Referring to Figure 7, a photograph shows an experimental setup of a modular radio power system with an injection-synchronous RF generator. This setup may include various electronic devices on a workbench, such as an oscilloscope, function generator, and other measuring instruments. In some aspects, this setup may be installed in a laboratory environment where the system is being tested and analyzed.

[0050] In the foreground of the photograph, a resonator with a circuit board attached can be seen. This resonator may be one of the resonators (first resonator, second resonator, third resonator, etc.) in a modular radio power system. This resonator is connected to an RF generator, which may be configured to drive the resonator at a predetermined frequency. This RF generator may contain various components, such as a Class E amplifier, injection-synchronous oscillator, and low-pass filter, as mentioned earlier.

[0051] In various embodiments, a wireless LED load may be positioned to the right of the resonator in the photograph. This LED load represents a device that receives power wirelessly from the resonator. The LED load is coupled to the resonator via the magnetic field generated by the resonator, enabling wireless power transmission from the resonator to the LED load. The LED load includes one or more LEDs that light up when power is received from the resonator, demonstrating the wireless power transmission capability of this system.

[0052] This resonator and LED load demonstrate an example of the system's application in a real-world environment. In some embodiments, the resonator and LED load are movable, allowing the configuration of the wireless power zone to be easily adapted to various environments and shapes. This provides flexibility in the placement of the resonator and LED load, enabling efficient and convenient wireless power transmission in diverse application scenarios.

[0053] Referring to Figure 8, a photograph of the experimental setup of a modular radio power system with an injection-synchronous RF generator is shown. In some respects, the system can include two separate resonators, each with associated circuitry, arranged in a specific configuration. Each of these resonators, which may be the first, second, or third resonator, is radio-coupled to an LED load. The LED load is indicated by the illuminated LEDs in the photograph, demonstrating the radio power transmission capability of the system.

[0054] In various embodiments, the resonators are connected to a power source via a cable, such as the red cable shown in the photograph. This cable supplies DC power to an RF generator associated with each resonator, enabling the RF generator to produce an RF signal that drives the resonator. This power source is any suitable power source capable of supplying the required DC power, such as a battery, power adapter, or power supply unit.

[0055] The experimental setup may include various electronic devices and tools, as can be seen in the background of the photograph. This suggests that the system is being tested and analyzed in a laboratory environment. The electronic devices may include oscilloscopes, function generators, frequency counters, and other measuring instruments, which may be used to monitor and analyze the system's performance.

[0056] In several respects, the resonators and LED loads are movable, allowing the configuration of the wireless power zone to be easily adapted to various environments and shapes. This provides flexibility in the placement of the resonators and LED loads, promoting efficient and convenient wireless power transmission in diverse application scenarios. For example, by moving the resonators closer together or further apart, the mutual inductance can be adjusted, affecting the frequency synchronization of the RF generator. Similarly, by moving the LED loads closer together or further away from the resonators, the power received by the loads can be adjusted.

[0057] In various embodiments, as described above, resonators can be added, removed, or moved to different locations within the radio power zone. This allows for the construction of radio power zones that can adapt to various environments and shapes, providing maximum flexibility in the deployment of the system. For example, resonators can be added to expand the radio power zone, or existing resonators can be moved to different locations to adapt to new environments or shapes.

[0058] Referring to Figure 9, a series of graphs illustrating the performance characteristics of a modular radio power system with injection-synchronous RF generators are shown. The upper graph displays the DC power consumption of the left and right RF generators as a function of the frequency deviation from the center frequency of 6.78 MHz. In some aspects, the left RF generator is represented by a circle and the right RF generator by a rectangle. This graph shows the relationship between frequency deviation and DC power consumption, which are important parameters for maintaining stable and efficient radio power transmission within this system.

[0059] In various embodiments, the DC power consumption of the RF generator increases with increasing frequency deviation, indicating a positive correlation between power consumption and frequency deviation. In some embodiments, the DC power consumption of the RF generator decreases with increasing frequency deviation, indicating a negative correlation between power consumption and frequency deviation. The specific relationship between DC power and frequency deviation depends on various factors, including the RF generator design, operating conditions, and the coupling between resonators.

[0060] The lower graph in Figure 9 shows the phase difference between RF oscillators in the same frequency range. This graph illustrates the phase synchronization behavior of this system. In some aspects, the phase difference between RF oscillators remains constant across the frequency range, indicating that the RF oscillators are frequency synchronized. In some embodiments, the phase difference between RF generators fluctuates within that frequency range, indicating that the RF generators are adjusting their phases to maintain frequency synchronization.

[0061] In some embodiments, the system can maintain frequency synchronization as long as the load difference between the two sides is less than approximately 28W. This suggests that the system can tolerate a certain degree of imbalance in the resonator load while maintaining frequency synchronization. This characteristic provides flexibility in wireless load distribution between resonators, enabling efficient and convenient wireless power transmission in various application scenarios.

[0062] Referring to Figure 10, a graph is shown representing power transmission as a function of the phase difference between two resonators in a modular wireless power system. The horizontal axis of this graph displays the sine value of the phase difference between the RF currents in the resonators, sin(φ1 - φ2), and the vertical axis displays the power transmission amount P1→2 in units of watts (W). This graph includes data points labeled "Measured Values," which are fitted to a "Linear Approximation" line, showing a linear relationship between power transmission and the sine value of the phase difference.

[0063] In some embodiments, the power transfer between two resonators is calculated by taking the measured DC power and subtracting the DC power of the RF generator when the two resonators were uncoupled. The power transfer is then calculated by taking the difference between the resulting excess powers and dividing by two. This calculation provides a measurement of the power transfer between resonators and can be used to maintain injection synchronization between RF generators.

[0064] In various embodiments, power transfer between resonators is directly proportional to the sine of the phase difference between the RF currents within the resonators. This means that power transfer increases as the phase difference approaches 90 degrees and decreases as the phase difference approaches 0 or 180 degrees. This relationship provides a mechanism for the RF generator to adjust the phase in order to maintain a constant phase difference, and thus frequency synchronization, despite variations in the coupling between the resonators.

[0065] In some embodiments, the system is modular, allowing each resonator to be added, removed, or moved to a different location. This modularity provides flexibility to adapt the radio power zone to various environments and shapes. For example, additional resonators can be added to expand the radio power zone, or existing resonators can be moved to different locations to adapt to new environments and shapes. In such cases, each RF generator may be connected to a separate LC resonator within a magnetic resonant radio power source, and configured to sense the RF current of other RF generators through the mutual inductance between the resonators, and use this sensed current to frequency-synchronize the RF generators.

[0066] The above description represents representative aspects of this disclosure. However, it should be recognized that such a description is not intended to limit the scope of this disclosure. Rather, this description includes combinations and modifications of the exemplary aspects described herein. Numerous embodiments have been described. However, it will be understood that various modifications are possible without departing from the spirit and scope of this disclosure. Accordingly, other implementations are also within the scope of the following claims.

[0067] The features, structures, or properties described above can be combined in any suitable way in one or more embodiments, and the features discussed in the various embodiments are interchangeable where possible. Numerous specific details are provided in the following description to fully understand the embodiments of this disclosure. However, those skilled in the art will understand that the technical solutions of this disclosure can be implemented without one or more specific details, or that other methods, components, materials, etc., can be employed. In other examples, well-known structures, materials, or operations are not shown or described in detail so as not to obscure aspects of this disclosure.

[0068] In this specification, relative terms such as “up,” “down,” “upper,” and “lower” are used to describe the relative relationship between one component and another. These terms are used only for convenience, for example, to indicate direction in the illustrated examples. If the apparatus is inverted, it can be understood that the component described as “upper” above becomes “lower.” When one structure is “on” another structure, it is possible that the structure is integrally formed on the other structure, that the structure is “directly” positioned on the other structure, or that it is “indirectly” positioned on the other structure via the other structure.

[0069] In this specification, terms such as “one,” “one,” “one,” and “the foregoing” are used to indicate the presence of one or more elements and components. Unless otherwise specified in the accompanying claims, “includes,” “contains,” “has,” “contains,” and variations thereof are used in an open sense to include additional elements and components in addition to those described.

[0070] Terms such as "first," "second," etc., are not used to limit the number of objects, but are merely labels. When multiple components are shown, it is understood that they may be referred to as the "first" component, the "second" component, etc., to the extent applicable.

[0071] The examples of embodiments described above in this disclosure are merely examples of implementables presented to clearly illustrate the principles of the disclosure. Many modifications and alterations can be made to these embodiments without substantially departing from the spirit and principles of this disclosure. All such modifications and alterations are intended to be included within the scope of this disclosure and protected by the following claims.

Claims

1. A wireless power system, A magnetic resonance radio power supply having multiple coupled LC resonators, where each resonator is driven by a separate radio frequency (RF) generator; Here, each RF generator is configured to detect the phase of other RF generators and adjust its own phase to maintain a constant phase difference between itself and the other RF generators; and Here, the system is modular, and therefore each resonator can be added, removed, or moved to a different position.

2. In the wireless power system according to claim 1, Here, each RF generator is equipped with a Class E amplifier driven by an injection-synchronous oscillator.

3. In the wireless power system according to claim 2, Here, each RF generator is further equipped with a low-pass filter configured to output a sinusoidal current with a nearly constant amplitude.

4. In the wireless power system according to claim 3, Here, each RF generator is configured to detect the phase of the RF current of the other RF generators through the induced voltage detected by the low-pass filter.

5. In the wireless power system according to claim 4, Here, each RF generator is equipped with a variable capacitor that is controlled to maintain a constant reactance at the output terminal of the RF generator.

6. In the wireless power system according to claim 5, Here, each RF generator is configured to adjust its phase based on a combined voltage derived from a voltage signal and a current signal, and the voltage signal and the current signal are multiplied by their respective gain coefficients.

7. In the wireless power system according to claim 6, Here, each RF generator is configured to maintain frequency synchronization even in the presence of environmental disturbances by adjusting a variable capacitor.

8. A wireless power system, It comprises multiple radio frequency (RF) generators, each RF generator connected to a separate LC resonator within a magnetic resonance radio power supply; Here, each RF generator is configured to detect the RF current of other RF generators through the mutual inductance between their resonators, and to use this detected current to frequency-synchronize the RF generators.

9. In the wireless power system according to claim 8, Here, the system is modular, and therefore each resonator can be added, removed, or moved to a different location.

10. In the wireless power system according to claim 8, Here, each RF generator comprises a Class E amplifier driven by an injection-synchronous oscillator, and each RF generator further comprises a low-pass filter configured to output a sinusoidal current of substantially constant amplitude.

11. In the wireless power system according to claim 10, Here, each RF generator is configured to detect the phase of the RF current of the other RF generators through the induced voltage detected by the low-pass filter.

12. In the wireless power system according to claim 11, Here, each RF generator is equipped with a variable capacitor that is controlled to maintain a constant reactance at the output terminal of the RF generator.

13. In the wireless power system according to claim 12, Here, each RF generator is configured to adjust its phase based on a combined voltage derived from a voltage signal and a current signal, and the voltage signal and the current signal are multiplied by their respective gain coefficients.

14. In the wireless power system according to claim 13, Here, each RF generator is configured to maintain frequency synchronization even in the presence of environmental disturbances by adjusting a variable capacitor.

15. A method for forming a wireless power zone, It provides a magnetic resonance radio power source having multiple coupled LC resonators, each resonator driven by an individual radio frequency (RF) generator; Each RF generator is configured to detect the phase of other RF generators and adjust its phase to maintain a constant phase difference between itself and the other RF generators; and The configuration of the radio power zone is changed by adding, removing, or moving the resonators to different locations.

16. In the method according to claim 15, Here, each RF generator is equipped with a Class E amplifier driven by an injection-synchronous oscillator.

17. In the method according to claim 16, Here, each RF generator is further equipped with a low-pass filter configured to output a sinusoidal current with a nearly constant amplitude.

18. In the method according to claim 17, Here, each RF generator is configured to detect the phase of the RF current of the other RF generators through the induced voltage detected by the low-pass filter.

19. In the method according to claim 18, Here, each RF generator is equipped with a variable capacitor that is controlled to maintain a constant reactance at the output terminal of the RF generator.

20. In the method according to claim 19, Here, each RF generator is configured to adjust its phase based on a combined voltage derived from a voltage signal and a current signal, and the voltage signal and the current signal are multiplied by their respective gain coefficients.

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