Wireless power supply system

Abstract

A wireless power supply system is provided. The wireless power supply system includes a power coil circuit, a relay coil circuit and a receiving coil circuit. The power coil circuit receives a main power and sends the wireless power according to the main power. The relay coil circuit receives the wireless power and sends a relay power according to the wireless power. The receiving coil circuit receives the wireless power and the relay power and converts the wireless power and the relay power into a receiving power.

Description

[Technical Field]

[0001] This invention relates to a power supply system, and more particularly to a wireless power supply system. [Previous Technology]

[0002] Current wireless power supply systems can transmit power wirelessly. A wireless power supply system uses a power coil to transmit wireless power to a receiving coil. The load receives the power located at the receiving coil to operate or charge. However, when the power coil is not precisely aligned with the receiving coil, the transmission efficiency of the wireless power supply system will decrease.

[0003] Therefore, when the power coil is not precisely aligned with the receiving coil, how to improve the transmission efficiency of wireless power supply in a wireless power supply system is one of the key research focuses of those skilled in the art. [Summary of the Invention]

[0004] This invention provides a wireless power supply system. When the power coil is not precisely aligned with the receiving coil, the transmission efficiency of the wireless power supply system of this invention can be improved.

[0005] The wireless power supply system of the present invention includes a power coil circuit, a relay coil circuit, and a receiving coil circuit. The power coil circuit receives a main power supply and transmits wireless power according to the main power supply. The relay coil circuit receives the wireless power supply and transmits relay power according to the wireless power supply. The receiving coil circuit receives the wireless power supply and the relay power supply, and converts the wireless power supply and the relay power supply into received power. The relay coil circuit includes a relay coil. The receiving coil circuit includes a receiving coil. The relay coil and the receiving coil are not parallel to each other and do not overlap.

[0006] Based on the above, the relay coil circuit receives wireless power and transmits relay power according to the wireless power. The receiving coil circuit receives both the wireless power and the relay power and converts them into received power. In this way, the transmission efficiency of the wireless power supply system can be improved when the power coil circuit is not precisely aligned with the receiving coil.

Implementation Method

[0007] Some embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Component symbols used in the following description are considered to be the same or similar components when they appear in different drawings. These embodiments are only a part of the present invention and do not disclose all possible implementations of the invention. More precisely, these embodiments are merely examples within the scope of the present invention's patent application.

[0008] Please refer to Figure 1, which is a schematic diagram of a wireless power supply system according to an embodiment of the present invention. In this embodiment, the wireless power supply system 100 includes a power coil circuit 110, a relay coil circuit 120, and a receiving coil circuit 130. The power coil circuit 110 receives a main power supply PM and transmits a wireless power supply WPM based on the main power supply PM. The relay coil circuit 120 receives the wireless power supply WPM and transmits a relay power supply PRL based on the wireless power supply WPM. In this embodiment, the receiving coil circuit 130 receives the wireless power supply WPM and the relay power supply PRL, and converts the wireless power supply WPM and the relay power supply PRL into a receiving power supply PS. Furthermore, the relay coil circuit 120 includes a relay coil LI. The receiving coil circuit 130 includes a receiving coil LS. The relay coil LI and the receiving coil LS are not parallel to each other and do not overlap. Therefore, the relay coil LI and the receiving coil LS increase the receiving range of the wireless power supply WPM.

[0009] It is worth mentioning that the repeater coil circuit 120 receives the wireless power supply WPM and transmits the repeater power supply PRL based on the wireless power supply WPM. The receiving coil circuit 130 receives the wireless power supply WPM and the repeater power supply PRL, and converts the wireless power supply WPM and the repeater power supply PRL into a receiving power supply PS. The power of the receiving power supply PS can be compensated by the repeater power supply PRL. In this way, when the power coil circuit 110 is not precisely aligned with the receiving coil LS, the transmission efficiency of the wireless power supply system 100 can be improved.

[0010] In this embodiment, the power coil circuit 110 includes a power coil LP. The power coil LP transmits wireless power WPM.

[0011] In this embodiment, when the power coil LP and the receiving coil LS are precisely aligned, the receiving coil LS can receive the complete wireless power WPM. When the power coil LP is not precisely aligned with the receiving coil LS, the receiving coil LS can receive a portion of the wireless power WPM. It should be noted that when the power coil LP is not precisely aligned with the receiving coil LS, the repeater coil LI will also receive a portion of the wireless power WPM. Therefore, the power of the receiving power PS can be compensated by the repeater power PRL.

[0012] Please refer to Figure 2, which is a schematic diagram of a wireless power supply system according to an embodiment of the present invention. In this embodiment, the wireless power supply system 200 includes a power coil circuit 210, repeater coil circuits 220_1 and 220_2, and receiving coil circuits 230_1 and 230_2. The power coil circuit 210 includes a power coil LP and a power resonant circuit 211. The power coil LP transmits wireless power WPM. The power resonant circuit 211 is coupled to the power coil LP. The power resonant circuit 211 receives the main power PM and provides the main power PM to the power coil LP. The power resonant circuit 211 and the power coil LP determine the resonant frequency fp and amplitude of the wireless power WPM.

[0013] In this embodiment, the relay coil circuit 220_1 includes a relay coil LI1 and a relay resonant circuit 221_1. The relay coil LI1 receives wireless power WPM and transmits relay power PRL1. The relay resonant circuit 221_1 is connected to the relay coil LI1. The relay resonant circuit 221_1 and the relay coil LI1 determine the resonant frequency fi1 and amplitude of the relay power PRL1.

[0014] In this embodiment, the relay coil circuit 220_2 includes a relay coil LI2 and a relay resonant circuit 221_2. The relay coil LI2 receives wireless power WPM and transmits relay power PRL2. The relay resonant circuit 221_2 is connected to the relay coil LI2. The relay resonant circuit 221_2 and the relay coil LI2 determine the resonant frequency fi2 and amplitude of the relay power PRL2.

[0015] In this embodiment, the receiving coil circuit 230_1 includes a receiving coil LS1 and a receiving resonant circuit 231_1. The receiving coil LS1 receives relay power supplies PRL1 and PRL2, and a wireless power supply WPM. Therefore, the power received by the receiving coil LS1 is approximately equal to the sum of the power received by the relay power supplies PRL1 and PRL2, and the power of the wireless power supply WPM. The receiving resonant circuit 231_1 is connected to the receiving coil LS1. The receiving resonant circuit 231_1 outputs a receiving power supply PS1. The receiving resonant circuit 231_1 and the receiving coil LS1 determine the resonant frequency fs1 and amplitude of the receiving power supply PS1.

[0016] In this embodiment, the receiving coil circuit 230_2 includes a receiving coil LS2 and a receiving resonant circuit 231_2. The receiving coil LS2 receives relay power supplies PRL1 and PRL2, and wireless power supply WPM. Therefore, the power received by the receiving coil LS2 is approximately equal to the sum of the power received by the relay power supplies PRL1 and PRL2 and the wireless power supply WPM. The receiving resonant circuit 231_2 is connected to the receiving coil LS2. The receiving resonant circuit 231_2 outputs a receiving power supply PS2. The receiving resonant circuit 231_2 and the receiving coil LS2 determine the resonant frequency fs2 and amplitude of the receiving power supply PS2. In this embodiment, the relay coil LS2 and the receiving coil LS2 are not parallel to each other and do not overlap.

[0017] In this embodiment, the resonant frequencies fp, fi1, fi2, fs1, and fs2 can be adjusted to be the same as the operating frequency. Furthermore, at least one of the resonant frequencies fp, fi1, fi2, fs1, and fs2 can be adjusted to be different from the operating frequency. Therefore, the amplitude of at least one of the wireless power supply WPM, the receiving power supplies PS1 and PS2, and the relay power supplies PRL1 and PRL2 can be adjusted. In other words, the waveforms of the wireless power supply WPM, the receiving power supplies PS1 and PS2, and the relay power supplies PRL1 and PRL2 can be adjusted based on the actual situation.

[0018] In this embodiment, the wireless power supply system 200 further includes a power supply circuit 240. The power supply circuit 240 is connected to the power coil circuit 210. The power supply circuit 240 provides a main power supply PM based on an external power source. The power supply circuit 240 can be implemented by a power converter or inverter well known to those skilled in the art.

[0019] In this embodiment, the wireless power supply system 200 further includes an output circuit 250. The output circuit 250 is connected to the receiving resonant circuits 231_1 and 231_2. The output circuit 250 receives receiving power supplies PS1 and PS2, and generates an output power supply PO based on the receiving power supplies PS1 and PS2. The output power supply PO is provided to the load. For example, the components of the load can be driven according to the output power supply PO. For example, the load can use the output power supply PO to charge the battery in the load. For example, the load can be, for example, an electric vehicle, but the invention is not limited thereto. The load can be an Automated Guided Vehicle (AGV) or a Rail Guided Vehicle (RGV), but the invention is not limited thereto.

[0020] In this embodiment, the output circuit 250 and the receiving coil circuits 230_1 and 230_2 are disposed on the load. The output circuit 250 supplies power to the load using the output power supply PO. In some embodiments, the relay coil circuits 220_1 and 220_2 are disposed on the load. In some embodiments, the relay coil circuits 220_1 and 220_2 are disposed outside the load.

[0021] Please refer to Figures 2 and 3. Figure 3 is a circuit diagram of a power coil circuit according to an embodiment of the present invention. In this embodiment, the power resonant circuit 211 includes an inductor L1 and capacitors C1 and C2. The first end of the inductor L1 is connected to the first receiving end of the power resonant circuit 211. The capacitor C1 is connected between the second end of the inductor L1 and the first end of the power coil LP. The first end of the capacitor C2 is connected to the second end of the inductor L1. The second end of the capacitor C2 is connected to the second end of the power coil LP and the second receiving end of the power resonant circuit 211. The power resonant circuit 211 uses the first receiving end and the second receiving end to receive the main power supply PM. In this embodiment, capacitors C1 and C2 can be variable capacitors. The capacitance values ​​of capacitors C1 and C2 can be adjusted. Inductor L1 can be a variable inductor. The inductance value of inductor L1 can be adjusted. Therefore, the resonant frequency fp can be adjusted.

[0022] In some embodiments, the power supply resonant circuit 211 may be implemented by other inductor-capacitor (LC) networks or capacitor networks. The embodiments of the power supply resonant circuit 211 of the present invention are not limited to this embodiment.

[0023] Please refer to Figures 2 and 4. Figure 4 is a circuit diagram of a relay coil circuit according to an embodiment of the present invention. Figure 4 shows relay coil circuits 220_1 and 220_2. In this embodiment, the relay resonant circuit 221_1 includes an inductor L2_1 and capacitors C3_1 and C4_1. Inductor L2_1 is connected between the first end of capacitor C3_1 and the first end of relay coil LI1. The first end of capacitor C4_1 is connected to the first end of relay coil LI1. The second end of capacitor C4_1 is connected to the second end of relay coil LI1 and the second end of capacitor C3_1. In this embodiment, capacitors C3_1 and C4_1 can be variable capacitors. The capacitance values ​​of capacitors C3_1 and C4_1 can be adjusted. Inductor L2_1 can be a variable inductor. The inductance value of inductor L2_1 can be adjusted. Therefore, the resonant frequency fi1 can be adjusted.

[0024] In this embodiment, the relay resonant circuit 221_2 includes an inductor L2_2 and capacitors C3_2 and C4_2. Inductor L2_2 is connected between the first terminal of capacitor C3_2 and the first terminal of relay coil LI2. The first terminal of capacitor C4_2 is connected to the first terminal of relay coil LI2. The second terminal of capacitor C4_2 is connected to the second terminal of relay coil LI2 and the second terminal of capacitor C3_2. In this embodiment, capacitors C3_2 and C4_2 can each be variable capacitors. The capacitance values ​​of capacitors C3_2 and C4_2 can be adjusted. Inductor L2_2 can be a variable inductor. The inductance value of inductor L2_2 can be adjusted. Therefore, the resonant frequency fi2 can be adjusted.

[0025] In some embodiments, the relay resonant circuits 221_1 and 221_2 may be implemented by other inductor-capacitor (LC) networks or capacitor networks. The embodiments of the relay resonant circuits 221_1 and 221_2 of the present invention are not limited to this embodiment.

[0026] Please refer to Figures 2 and 5. Figure 5 is a circuit diagram of a receiving coil circuit according to an embodiment of the present invention. Figure 5 shows receiving coil circuits 230_1 and 230_2. In this embodiment, the receiving resonant circuit 231_1 includes capacitors C5_1 and C6_1. The first end of capacitor C5_1 is connected to the first end of the receiving coil LS1. The second end of capacitor C5_1 is connected to the first output terminal of the receiving resonant circuit 231_1. The first end of capacitor C6_1 is connected to the first output terminal of the receiving resonant circuit 231_1. The second end of capacitor C6_1 is connected to the second output terminal of the receiving resonant circuit 231_1 and the second end of the receiving coil LS1. In this embodiment, capacitors C5_1 and C6_1 can be variable capacitors. The capacitance values ​​of capacitors C5_1 and C6_1 can be adjusted. Therefore, the resonant frequency fs1 can be adjusted. The receiving resonant circuit 231_1 outputs the receiving power supply PS1 using its first output terminal and second output terminal.

[0027] In this embodiment, the receiving resonant circuit 231_2 includes capacitors C5_2 and C6_2. The first end of capacitor C5_2 is connected to the first end of the receiving coil LS2. The second end of capacitor C5_2 is connected to the first output terminal of the receiving resonant circuit 231_2. The first end of capacitor C6_2 is connected to the first output terminal of the receiving resonant circuit 231_2. The second end of capacitor C6_2 is connected to the second output terminal of the receiving resonant circuit 231_2 and the second end of the receiving coil LS2. In this embodiment, capacitors C5_2 and C6_2 can be variable capacitors. The capacitance values ​​of capacitors C5_2 and C6_2 can be adjusted. Therefore, the resonant frequency fs2 can be adjusted. The receiving resonant circuit 231_2 outputs the receiving power supply PS2 using its first and second output terminals.

[0028] In some embodiments, the receiving resonant circuits 231_1 and 231_2 may be implemented by other inductor-capacitor (LC) networks or capacitor networks. The implementation of the receiving resonant circuits 231_1 and 231_2 of the present invention is not limited to this embodiment.

[0029] Please refer to Figures 2 and 6. Figure 6 is a schematic diagram illustrating the application of a wireless power supply system according to an embodiment of the present invention. In this embodiment, the wireless power supply system 200 can be applied, for example, to an automated guided vehicle (AGVH1) (i.e., a load). An output circuit 250 and receiving coil circuits 230_1 and 230_2 are disposed on the AGVH1. Relay coil circuits 220_1 and 220_2 are disposed outside the AGVH1. A power coil circuit 210 is disposed on a power supply device CD. Figure 6 also shows the spatial relationship between the power coil LP, relay coils LI1 and LI2, and receiving coils LS1 and LS2. When the AGVH1 approaches the power coil LP, there is a gap space GS between the receiving coils LS1 and LS2 and the power coil LP. The power coil circuit 210 provides wireless power WPM to the gap space GS.

[0030] Repeater coil LI1 is positioned above the gap space GS. Repeater coil LI2 is positioned below the gap space GS. Therefore, in the planes of directions D1 and D2, the power coil LP, repeater coils LI1 and LI2, and receiving coils LS1 and LS2 are located around the gap space GS. Thus, the repeater coil circuits 220_1 and 220_2 and the receiving coil circuits 230_1 and 230_2 can ensure the reception of the vast majority of the wireless power WPM.

[0031] In this embodiment, the power coil LP, relay coils LI1, LI2, and receiving coils LS1, LS2 are planar coils. The power coil LP and receiving coils LS1, LS2 extend at least along the planes in directions D2 and D3, respectively. The relay coils LI1, LI2 extend at least along the planes in directions D1 and D3, respectively. In this embodiment, the relay coil LI2 is parallel to the relay coil LI1. The relay coil LI2 is perpendicular to the receiving coils LS1, LS2, and respectively. In this embodiment, the angle between the receiving coil LS1 and the relay coil LI1 is approximately 90°. The angle between the receiving coil LS2 and the relay coil LI2 is approximately 90°. However, the invention is not limited thereto. The angle between the receiving coil LS1 and the relay coil LI1 may be less than or equal to 105°. The angle between the receiving coil LS2 and the relay coil LI2 may be less than or equal to 105°. The positions of the power coil LP, relay coils LI1, LI2, and receiving coils LS1, LS2 are allowed to be offset and skewed. As long as the power coil LP, repeater coils LI1 and LI2, and receiver coils LS1 and LS2 are located around the gap space GS, the repeater coil circuits 220_1 and 220_2 and the receiver coil circuits 230_1 and 230_2 can still ensure that most of the wireless power WPM is received.

[0032] In this embodiment, the receiving coils LS1 and LS2 are arranged at least along direction D3. In some embodiments, the receiving coils LS1 and LS2 are arranged at least along direction D2.

[0033] In some embodiments, the wireless power supply system 200 may include two magnetic structures (not shown). Relay coil LI1 and receiving coil LS1 are respectively wound around the same magnetic structure. Relay coil LI2 and receiving coil LS2 are respectively wound around another magnetic structure. Therefore, the inductive coupling between receiving coil LS1 and relay coil LI1 can be enhanced. The inductive coupling between receiving coil LS2 and relay coil LI2 can be enhanced. For example, the two magnetic structures may each be an iron core.

[0034] Please refer to Figures 2 and 7A, where Figure 7A is a schematic diagram illustrating the application of a wireless power supply system according to an embodiment of the present invention. In this embodiment, the wireless power supply system 200 can be applied, for example, to a track-guided vehicle (i.e., a load). The power coil LP can be arranged along the track. The wireless power supply system 200 may include magnetic structures CR1 and CR2. In this embodiment, the magnetic structures CR1 and CR2 can each be a C-shaped iron core. The magnetic structures CR1 and CR2 span any identical coil position P1 of the power coil LP to form a common coupling structure. The relay coil LI1 and the receiving coil LS1 are respectively surrounding the magnetic structure CR1. The relay coil LI2 and the receiving coil LS2 are respectively surrounding the magnetic structure CR2. The magnetic flux corresponding to the wireless power supply WPM is confined within the magnetic structures CR1 and CR2. Therefore, the relay coil circuits 220_1 and 220_2 and the receiving coil circuits 230_1 and 230_2 can still ensure that the vast majority of the wireless power supply WPM is received. Furthermore, the inductive coupling between the receiving coil LS1 and the relay coil LI1 can be enhanced. The inductive coupling between the receiving coil LS2 and the relay coil LI2 can be enhanced.

[0035] In this embodiment, the relay coil circuits 220_1, 220_2, the receiving coil circuits 230_1, 230_2, and the output circuit 250 are mounted on the track-guided vehicle. The angle between the receiving coil LS1 and the relay coil LI1 can be less than or equal to 105°. The angle between the receiving coil LS2 and the relay coil LI2 can be less than or equal to 105°. The positions of the power coil LP, the relay coils LI1, LI2, and the receiving coils LS1, LS2 are allowed to be offset and tilted. As long as the magnetic structures CR1, CR2 span the power coil LP, the relay coil circuits 220_1, 220_2 and the receiving coil circuits 230_1, 230_2 can still ensure that most of the wireless power WPM is received.

[0036] Please refer to Figures 2 and 7B, where Figure 7B is a schematic diagram illustrating the application of a wireless power supply system according to an embodiment of the present invention. In this embodiment, the wireless power supply system 200 can be applied, for example, to a rail-guided vehicle (i.e., a load). Unlike Figure 7A, the magnetic structures CR1 and CR2 span different coil positions P1 and P2 of the power coil LP, respectively. For example, magnetic structure CR1 spans coil position P1, and magnetic structure CR2 spans coil position P2. Therefore, as long as at least one of the magnetic structures CR1 and CR2 spans the power coil LP, the relay coil circuits 220_1 and 220_2 and the receiving coil circuits 230_1 and 230_2 can still ensure the reception of the vast majority of the wireless power WPM.

[0037] Please refer to Figures 2, 6, and 8A. Figure 8A is an equivalent schematic diagram of a wireless power supply system according to an embodiment of the present invention. In the application of the automated guided vehicle VH1, the power coil LP, relay coils LI1 and LI2, and receiving coils LS1 and LS2 can be mutually coupled and mutually inducted. Therefore, if at least one of the resonant frequencies fi1 and fi2 is adjusted, the voltage values ​​of the receiving power supplies PS1 and PS2 are adjusted. Therefore, the voltage value of the output power supply PO is also adjusted. In other words, the voltage value of the output power supply PO can be increased or decreased according to the change of at least one of the resonant frequencies fi1 and fi2.

[0038] Please refer to Figures 2, 7, and 8B. Figure 8B is an equivalent schematic diagram of a wireless power supply system according to an embodiment of the present invention. In the application of a track-guided vehicle, the power coil LP, the relay coil LI1, and the receiving coil LS1 can form a first co-coupling and mutual inductance relationship with each other. The power coil LP, the relay coil LI2, and the receiving coil LS2 can form a second co-coupling and mutual inductance relationship with each other. Therefore, if the resonant frequency fi1 is adjusted, the voltage value of the receiving power supply PS1 is adjusted. If the resonant frequency fi2 is adjusted, the voltage value of the receiving power supply PS2 is adjusted.

[0039] Please refer to Figures 2 and 9A. Figure 9A is a schematic diagram of a receiving coil circuit and an output circuit according to an embodiment of the present invention. In this embodiment, the first output terminal of the output circuit 250 is connected to the first output terminal of the receiving coil circuit 230_1. The second output terminal of the output circuit 250 is connected to the first output terminal of the receiving coil circuit 230_2. The output circuit 250 connects the second output terminal of the receiving coil circuit 230_1 to the first output terminal of the receiving coil circuit 230_2. Therefore, the receiving coil circuits 230_1 and 230_2 are connected in series. The voltage value of the output power supply PO is equal to the sum of the voltage values ​​of the receiving power supply PS1 and the receiving power supply PS2.

[0040] Please refer to Figures 2 and 9B. Figure 9B is a schematic diagram of a receiving coil circuit and an output circuit according to an embodiment of the present invention. In this embodiment, the first output terminal of the output circuit 250 is connected to the first output terminal of the receiving coil circuit 230_1 and the first output terminal of the receiving coil circuit 230_2. The second output terminal of the output circuit 250 is connected to the second output terminal of the receiving coil circuit 230_1 and the first output terminal of the receiving coil circuit 230_2. Therefore, the receiving coil circuits 230_1 and 230_2 are connected in parallel with each other. The voltage value of the output power supply PO is equal to the voltage value of the receiving power supply PS1 and the voltage value of the receiving power supply PS2.

[0041] Please refer to Figures 2 and 9C. Figure 9C is a schematic diagram of a receiving coil circuit and an output circuit according to an embodiment of the present invention. In this embodiment, the output circuit 250 can generate an output power supply PO1 based on the receiving power supply PS1 output by the receiving coil circuit 230_1. The output circuit 250 can generate an output power supply PO2 based on the receiving power supply PS2 output by the receiving coil circuit 230_2. For example, the voltage value of the output power supply PO1 is approximately the same as the voltage value of the receiving power supply PS1. The voltage value of the output power supply PO2 is approximately the same as the voltage value of the receiving power supply PS2.

[0042] In this embodiment, the output circuit 250 can change the connection relationship between the first output terminal of the receiving coil circuit 230_1, the second output terminal of the receiving coil circuit 230_1, the first output terminal of the receiving coil circuit 230_2, and the second output terminal of the receiving coil circuit 230_2, thereby changing the output mode. For example, the output circuit 250 can change the connection relationship between the first output terminal of the receiving coil circuit 230_1, the second output terminal of the receiving coil circuit 230_1, the first output terminal of the receiving coil circuit 230_2, and the second output terminal of the receiving coil circuit 230_2 via a switching network or a path selection circuit.

[0043] In summary, the repeater coil circuit receives wireless power and transmits relay power based on the wireless power. The receiving coil circuit receives both the wireless power and the relay power, and converts them into received power. The power of the received power can be compensated by the relay power. In this way, the transmission efficiency of the wireless power supply system can be improved even when the power coil circuit is not precisely aligned with the receiving coil. Furthermore, the repeater coil and the receiving coil are not parallel to each other and do not overlap. Therefore, the repeater coil and the receiving coil increase the receiving range of the wireless power.

[0044] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims. [Simplified Explanation of the Diagram]

[0045] Figure 1 is a schematic diagram of a wireless power supply system according to an embodiment of the present invention. Figure 2 is a schematic diagram of a wireless power supply system according to an embodiment of the present invention. Figure 3 is a circuit diagram of a power coil circuit according to an embodiment of the present invention. Figure 4 is a circuit diagram of a relay coil circuit according to an embodiment of the present invention. Figure 5 is a circuit diagram of a receiving coil circuit according to an embodiment of the present invention. Figure 6 is an application schematic diagram of a wireless power supply system according to an embodiment of the present invention. Figures 7A and 7B are application schematic diagrams of a wireless power supply system according to an embodiment of the present invention. Figures 8A and 8B are equivalent schematic diagrams of a wireless power supply system according to an embodiment of the present invention. Figures 9A, 9B, and 9C are schematic diagrams of a receiving coil circuit and an output circuit according to an embodiment of the present invention.

Claims

1. A wireless power supply system, comprising: A power coil circuit is configured to receive a main power supply and transmit a wireless power supply based on the main power supply. A first relay coil circuit is configured to receive the wireless power and transmit a first relay power according to the wireless power; and a first receiving coil circuit is configured to receive the wireless power and the first relay power and convert the wireless power and the first relay power into a first receiving power, wherein the first relay coil circuit includes a first relay coil, the first receiving coil circuit includes a first receiving coil, and the first relay coil and the first receiving coil are not parallel to each other and do not overlap.

2. The wireless power supply system as claimed in claim 1, wherein the first relay coil circuit further includes: A first relay resonant circuit is connected to the first relay coil and configured to determine the resonant frequency and amplitude of the relay power supply in conjunction with the first relay coil.

3. The wireless power supply system as claimed in claim 1, wherein the first receiving coil circuit further includes: A first receiving resonant circuit is connected to the first receiving coil and configured to determine the resonant frequency and amplitude of the first receiving power supply in conjunction with the first receiving coil.

4. The wireless power supply system as described in claim 3 further includes: A second relay coil circuit is configured to receive the wireless power and transmit a second relay power according to the wireless power. And a second receiving coil circuit, configured to receive the wireless power and the relay power, and convert the wireless power and the second relay power into a second receiving power.

5. The wireless power supply system as described in claim 4, wherein: The second relay coil circuit includes a second relay coil, and the second receiving coil circuit includes a second receiving coil, wherein the second relay coil and the second receiving coil are not parallel to each other and do not overlap.

6. The wireless power supply system as described in claim 5 further includes: A first magnetic structure, wherein the first relay coil and the first receiving coil are respectively surrounding the first magnetic structure.

7. The wireless power supply system as described in claim 6 further includes: A second magnetic structure, wherein the second relay coil and the second receiving coil are respectively surrounding the second magnetic structure.

8. The wireless power supply system as claimed in claim 7, wherein the first magnetic structure and the second magnetic structure are both C-type iron cores.

9. The wireless power supply system as claimed in claim 5, wherein the second relay coil circuit further includes: A second relay resonant circuit is connected to the second relay coil and configured to determine the resonant frequency and amplitude of the second relay power supply in conjunction with the second relay coil.

10. The wireless power supply system as described in claim 5, wherein: The second relay coil is parallel to the first relay coil, and the second relay coil is perpendicular to both the first receiving coil and the second receiving coil.

11. The wireless power supply system as described in claim 5, wherein: The angle between the first receiving coil and the first relay coil is less than or equal to 105°, and the angle between the second receiving coil and the second relay coil is less than or equal to 105°.

12. The wireless power supply system as claimed in claim 5, wherein the second receiving coil circuit further includes: A second receiving resonant circuit is connected to the second receiving coil and configured to determine the resonant frequency and amplitude of the second receiving power supply in conjunction with the second receiving coil.

13. The wireless power supply system as described in claim 12 further includes: An output circuit is connected to the first receiving resonant circuit and the second receiving resonant circuit, and is configured to receive the first receiving power supply and the second receiving power supply, and generate at least one output power supply based on the first receiving power supply and the second receiving power supply.

14. The wireless power supply system as claimed in claim 13, wherein the voltage value of the at least one output power supply is equal to the sum of the voltage values ​​of the first receiving power supply and the second receiving power supply.

15. The wireless power supply system as claimed in claim 13, wherein the voltage value of the at least one output power supply is equal to the voltage value of the first receiving power supply and the voltage value of the second receiving power supply.

16. The wireless power supply system as described in claim 13, wherein: The at least one output power supply includes a first output power supply and a second output power supply. The output circuit generates the first output power supply based on the voltage value of the first received power supply and generates the second output power supply based on the voltage value of the second received power supply.

17. The wireless power supply system as described in claim 13, wherein: The output circuit, the first receiving coil circuit, and the second receiving coil circuit are respectively disposed on a load, and the output circuit uses the at least one output power supply to power the load.

18. The wireless power supply system as claimed in claim 17, wherein the first relay coil circuit and the second relay coil circuit are respectively disposed on the load.

19. The wireless power supply system as claimed in claim 17, wherein the first relay coil circuit and the second relay coil circuit are respectively disposed outside the load.

20. The wireless power supply system as claimed in claim 1, wherein the power coil circuit comprises: A power coil, configured to transmit the wireless power; A power resonant circuit is coupled to the power coil and configured to receive the main power supply, wherein the power resonant circuit and the power coil determine the resonant frequency and amplitude of the wireless power supply.

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