JP-2026514266-A - Power transmission systems and methods

Abstract

The system and associated method transmit power between a DC power source and a variable load. Two power signals are extracted from the DC power source at HF frequencies via two self-synchronous high-frequency rectifiers/amplifiers, which are switched by two corresponding HF switching signals with a phase difference controlled by a duty cycle and overlap controller. The two HF power signals are mixed in a wired, wireless, or bimodal wireless HF power link system to generate a transferred power signal based on the mixing and phase difference operations. The unfolded output power signal is generated from the transferred power signals by a power signal conversion circuit that communicates with the HF power link system. This system and method allows for the transfer of a phase-locked adjustable DC power signal and an AC power signal to at least one load, which are both power signals in the load. [Selection Diagram] Figure 1

Inventors

• モハマドダバディ ソロシュ デハニ
• シャリアツザデ モハンマドジャバド
• ハフシェジャニ イーサン ハディザデ
• ダオン エフド
• アソデ アリレザ

Assignees

• ダアナア レゾリューション インク．

Dates

Publication Date

20260508

Application Date

20230315

Priority Date

20220316

Claims (20)

1. First and second self-synchronous high-frequency rectifiers/amplifiers configured to extract first and second high-frequency (HF) power signals from a DC power supply at first and second frequencies, respectively, An HF power link system configured to receive and mix the first and second HF power signals to generate a transferred power signal, A power transmission system for transmitting power between a DC power source and a variable load, comprising the HF power link system and a power signal conversion circuit configured to communicate with the variable load, generate an output power signal based at least partially on the transmitted power signal, and supply the output power signal to the variable load.
2. The system according to claim 1, further comprising an HF switching signal generator configured to supply first and second switching signals to the first and second rectifiers/amplifiers at first and second frequencies, respectively, and to establish and control the mutual phase relationship between the first and second switching signals.
3. The system according to claim 2, wherein the power signal conversion circuit comprises a switch-mode rectifier configured to receive the power signal transferred from the HF power link system and rectify the transferred power signal to generate a rectified power signal, and a decompression circuit configured to receive the rectified power signal from the switch-mode rectifier and decompress the rectified power signal to generate an output power signal.
4. The system according to claim 3, wherein the first and second self-synchronous high-frequency rectifiers/amplifiers are configured to operate in rectification mode, and the switch-mode rectifier is configured to operate in always-on mode, thereby extracting power from the variable load and transferring it to a DC power supply via the power signal conversion circuit and the HF power link system.
5. The first frequency and the second frequency are the same frequency. The system according to claim 2, characterized in that the first and second switching signals have a relative phase difference that can be adjusted by the HF switching signal generator.
6. The system according to claim 5, wherein the HF switching signal generator is configured to adjust the relative phase difference between the first switching signal and the second switching signal based on the DC level in the variable load, thereby generating the power transmitted from the HF power link system as a DC signal with adjusted amplitude.
7. The system according to claim 5, wherein the HF switching signal generator is configured to modulate the phase difference between the first switching signal and the second switching signal at least partially based on a modulation function using a phase modulation frequency derived from the frequency of the power signal of the variable load, and the power signal transmitted from the HF power link system is generated as an AC power signal modulated at the frequency of the power signal of the variable load.
8. The system according to claim 2, wherein the first and second frequencies differ by only the difference frequency.
9. The system according to claim 8, wherein the HF switching signal generator is configured to determine the first and second frequencies and set the difference frequency to twice the frequency of the power signal in the variable load.
10. The HF power link system is configured to generate a power signal transmitted at a difference frequency, and the power signal conversion circuit is configured to supply an output power signal to the variable load at the frequency of the power signal in the variable load, according to claim 8.
11. The system according to claim 1, wherein the HF power link system includes a wireless power link.
12. The wireless HF power link system is the system according to claim 11, which includes a bimodal wireless HF power link system.
13. The HF power link system is the system according to claim 1, which includes a wired HF power link.
14. The steps include: extracting corresponding first and second HF power signals from a DC power supply at first and second high-frequency (HF) frequencies via corresponding first and second self-synchronous high-frequency rectifiers/amplifiers; In an HF power link system, the steps include receiving and mixing the first and second HF power signals to generate a transferred power signal, In a power signal conversion circuit that communicates with the HF power link system and a variable load, the steps include generating an output power signal based at least partially on the transferred power signal, A method for transmitting power between a DC power supply and a variable load, comprising the step of supplying an output power signal to the variable load.
15. In an HF switching signal generator that communicates with the first and second rectifiers/amplifiers, the steps include generating first and second switching signals at first and second frequencies, respectively, The method according to claim 11, further comprising the step of establishing and controlling the mutual phase relationship between the first switching signal and the second switching signal in an HF switching signal generator.
16. The method according to claim 11, further comprising the steps of: receiving and rectifying the power signal transferred from the HF power link system in the switch-mode rectifier of the power signal conversion circuit; and receiving and unfolding the power signal rectified from the switch-mode rectifier in the unfolding circuit of the power signal conversion circuit.
17. The steps of setting the first and second self-synchronous high-frequency rectifiers/amplifiers to rectification mode, The method according to claim 16, further comprising the steps of setting the switch-mode rectifier to a permanently on mode, extracting power from the variable load, and transferring the extracted power to the DC power supply via the power signal conversion circuit and the HF power link system.
18. The method according to claim 15, wherein the transfer of the power signal in the HF power link system includes the wireless transfer of the power signal.
19. The method according to claim 18, wherein the transfer of the power signal at high frequency in the HF power link system includes the bimodal and wireless transfer of the power signal.
20. The method according to claim 15, wherein the transfer of the power signal in the HF power link system includes the transfer of the power signal via a wired connection.

Description

This application, with respect to cross-references to related applications, claims the interests of U.S. Patent Application No. 63/320,590, filed on 16 March 2022, and U.S. Patent Application No. 63/476,781, filed on 22 December 2022, the contents of which are incorporated herein by reference for all purposes. The present invention relates to a power transmitter, a receiver, a power transmission system, and a method thereof. In inductive power transmission (IPT), power is typically transmitted between coils of wire by a magnetic field. Alternating current (AC) is driven through the transmitting coil, generating an oscillating magnetic field. This field passes through the receiving coil, inducing an alternating current within it. The induced AC can either directly drive a load or be rectified into direct current (DC) applied to drive the load. To achieve high efficiency, the transmitting and receiving coils must be very close together. For example, it is common for the transmitting and receiving coils to be separated by only a portion of their diameter (e.g., within a few centimeters) and for their axes to be precisely aligned. Some IPT systems utilize resonant inductive coupling. Resonant inductive coupling can improve the efficiency of IPTs by using resonant circuits. It can achieve higher efficiency over longer distances than non-resonant inductive coupling. In resonant inductive coupling, power is transmitted by a magnetic field between two resonant circuits, one in the transmitter and one in the receiver. The two circuits are tuned to resonate at the same resonant frequency. Exemplary embodiments are shown in the reference drawings. The embodiments and figures disclosed herein are intended to be illustrative rather than restrictive. Figure 1 is a schematic diagram of a wireless power transmission system according to one exemplary embodiment. Figures 2A, 2B, and 2C show antennas that may be used in various exemplary embodiments, either alone or in combination with other disclosed elements. Figures 3A and 3B show side views of antennas that may be used in various exemplary embodiments, either alone or in combination with other disclosed elements. Figures 4A, 4B, 4C, and 4D show side views of exemplary resonators that may be used in various exemplary embodiments, alone, or in combination with other disclosed elements. Figure 5 shows a cross-sectional view of an exemplary resonator that may be used in various exemplary embodiments, either alone or in combination with other disclosed elements. Figure 6 is a schematic diagram of the primary side of a wireless power transmission system according to one exemplary embodiment. Figure 7 is a schematic diagram of the secondary side of a wireless power transmission system according to one exemplary embodiment. Figure 8 is a schematic diagram of an exemplary power amplifier that may be used in various exemplary embodiments, either alone or in combination with other disclosed elements. Figure 9 is a schematic diagram of an exemplary self-synchronous rectifier that may be used in various exemplary embodiments, either alone or in combination with other disclosed elements. Figure 10 shows a more detailed schematic diagram of a V/I tuner according to Figure 6, used to adjust the power signal to the transmitter resonator, according to one example. Figure 11 shows a flowchart of a short-range resonant wireless method, according to one exemplary embodiment, which transmits power bimodally according to a transfer mode ratio adjustable by the resonant power signal oscillation frequency. Figure 12 is a schematic diagram of a multi-transmitter short-range resonant wireless power transmission system for transmitting power to a single receiver subsystem. Figures 13A and 13B show a multi-transmitter short-range resonant wireless power transmission system for transmitting power to a single receiver subsystem. Figure 14 shows a multi-transmitter short-range resonant wireless power transmission system for transmitting power to two or more receiver subsystems. Figure 15 shows a flowchart of a wireless near-field method for transmitting power from multiple transmitter subsystems to a single resonant receiver subsystem at a variable resonant power signal oscillation frequency. Figure 16 shows a flowchart of another wireless near-field method for transmitting power from a multiplexer subsystem to a single-resonant receiver subsystem at a variable resonant power signal oscillation frequency. Figure 17 shows a flowchart of a wireless near-field method for transmitting power from a multiplex transmitter subsystem to multiple resonant receiver subsystems at a variable resonant power signal oscillation frequency. Figure 18 shows a flowchart of another wireless near-field method for transmitting power from a multiplexer subsystem to multiple resonant receiver subsystems at a variable resonant power signal oscillation frequency. Figure 19A shows a near-field resonant wireless power transmission