A radio power receiving method and a multi-coil multiplexing type radio power receiving device

Abstract

The present invention proposes a radio power receiving method and a multi-coil multiplexed radio power receiving device using the receiving method, wherein the radio power receiving method comprises: a receiving coil receives an AC signal from a transmitting base station; a rectifying unit rectifies the AC signal received by the receiving coil and converts it into a DC signal; a multiplexer unit concentrates the DC signal and outputs DC power; a communication and control unit modulates the multiplexer unit and the receiving coil, feeds back the electrical signal data to the transmitting base station, and monitors the load output. Once an abnormality occurs in the electrical signal at the load end, the communication and control unit starts to adjust the feedback work. The radio power receiving device of the present invention does not need to "align" the coil with the radio power transmission transmitting base station, so that the receiving coil can work normally regardless of its placement.

Description

Technical Field

[0001] The present invention relates to the field of radio power transmission, in particular to a radio power receiving method and a multi-coil multiplexing type radio power receiving device. Background Art

[0002] Wireless power transmission refers to a device that uses an alternating magnetic field to perform non-contact energy transmission between a primary coil (transmitting coil) and a secondary coil (receiving coil). The power ranges from a few watts to thousands of watts. Because it does not require a physical connector to conduct, it avoids the risk of "sparking" (or "arcing") between devices due to contact aging, and brings great convenience to users' actual use.

[0003] However, all types of wireless power transmission equipment currently have the disadvantage that the coils of the transmitting base station and the receiver must be "aligned" to achieve the most efficient and safe power transmission. Under existing technical conditions, the following four measures are generally used to solve this problem:

[0004] (1) Magnetic guidance: refers to placing a strong magnet at the center of the transmitting coil and the receiving coil, and using the magnetic attraction to "align" the coils; the disadvantage of this measure is that the strong magnet may damage the stored data and positioning equipment in the digital device as the receiving end;

[0005] (2) Power drive: refers to the use of a stepper motor to drive the transmitting coil to automatically "align" with the receiving coil; the disadvantage of this measure is that the stepper motor and its servo circuit are expensive, which is not conducive to the popularization of the product; in addition, because the transmitting coil has to follow the movement of the stepper motor, its lead must be very long, resulting in excessive alternating current loss in the coil and insufficient transmission power;

[0006] (3) Multi-coil transmission: Multiple transmitting coils are used to form a coil matrix, and the transmitting coil at the corresponding position is activated by sensing the position of the receiving coil, so as to achieve the concept of no need for "alignment". The disadvantage of this measure is that multiple transmitting coils cannot work at the same time. There will be a "dead zone" between the coils when they are actually activated, and it is not really possible to achieve no need for "alignment". In addition, multiple transmitting coils and corresponding multiple driving circuits are expensive.

[0007] (4) Marking point "alignment": refers to the manual "alignment" of the receiving device on the transmitting base station through the printed markings on the working surface of the transmitting base station. Although this measure is low-cost, it is not easy to "align" in actual application; and during the operation, it may be out of the "alignment" state due to external forces, thereby stopping power transmission.

[0008] Therefore, there is an urgent need to design a radio power receiving device that does not require traditional magnetic guidance "alignment" or power-driven transmitting coil "alignment", and can normally receive electrical energy from a transmitting base station as long as it is placed on the working surface of the transmitting base station. Summary of the invention

[0009] In order to solve the above problems, the present invention proposes a multi-coil multiplexing radio power receiving device that does not require traditional magnetic guidance "alignment" or power-driven transmitting coil "alignment", and can normally receive electrical energy from the transmitting base station as long as it is placed on the working surface of the transmitting base station.

[0010] The present invention is implemented by the following technical solution: The present invention proposes a radio power receiving method, the radio power receiving method comprising:

[0011] The receiving coil receives the AC signal from the transmitting base station;

[0012] The alternating current signal received by the receiving coil is rectified and converted into a direct current signal by a rectifying unit;

[0013] The multiplexer unit concentrates the DC signal and outputs DC power;

[0014] The communication and control unit modulates the multiplexer unit and the receiving coil, feeds back the electrical signal data to the transmitting base station, and monitors the load output. Once the electrical signal at the load end is abnormal, the communication and control unit starts to adjust the feedback work.

[0015] The present invention further proposes a multi-coil multiplexing type radio power receiving device, comprising the above-mentioned radio power receiving method, wherein the multi-coil multiplexing type radio power receiving device comprises:

[0016] A receiving rectifier device, comprising a plurality of coils and a plurality of rectifier units electrically connected to the plurality of coils, the plurality of coils receiving radio signals from a transmitting base station, the plurality of rectifier units rectifying and converting the AC signals received by the coils into DC signals;

[0017] A multiplexer device, which collects the DC signals processed by the plurality of rectifying units and outputs DC power to supply power to the communication and control device and input the DC power to the load output terminal;

[0018] A communication and control device, communicating with the multiplexer device, processing the signal from the multiplexer device, and the multiplexer device sends a control signal;

[0019] The load output terminal receives the direct current processed by the multiplexer device and outputs the direct current to provide power to external devices.

[0020] Furthermore, a communication terminal is provided between the receiving and rectifying device and the multiplexer device, and the multiplexer device performs signal modulation on the multiple coils through the communication terminal.

[0021] Furthermore, the multiple coils can be placed according to user needs.

[0022] Further, the plurality of coils are divided into a main coil and a secondary coil, the main coil receives a main radio power, and the secondary coil receives a diffused power at the edge of the main coil.

[0023] Furthermore, the plurality of coils are any one of coil windings wound by wires and printed coils embedded in PCB stacks.

[0024] Furthermore, the load output end is also provided with a sensor, and the sensor is used to monitor the voltage, current and temperature of the load output end.

[0025] Furthermore, a signal transmission line is provided between the load output terminal and the communication and control device, and the signal transmission line transmits the monitoring signal of the sensor to the communication and control device.

[0026] Beneficial effects of the present invention:

[0027] 1. The multi-coil multiplexing type radio power receiving device of the present invention is provided with a multiplexer device, so that the coils can work independently or several coils can work simultaneously. Therefore, in practical applications, each receiving coil can be stacked arbitrarily according to the product appearance or according to the user's requirements. The multi-coil multiplexing type radio power receiving device and the transmitting base station do not need to deliberately "align" the coils, so as to achieve the purpose of arbitrary placement.

[0028] 2. The multi-coil multiplexed radio power receiving device of the present invention does not require traditional magnetic guidance "alignment" nor power-driven transmitting coil "alignment". It can normally receive electrical energy from the transmitting base station as long as it is placed on the working surface of the transmitting base station, with high transmission efficiency and simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a principle block diagram of the multi-coil multiplexing type radio power receiving device of the present invention;

[0030] Figure 2 It is a schematic structural diagram of a multi-coil multiplexing type radio power receiving device of the present invention;

[0031] Figure 3-Figure 5 It is a schematic diagram of the installation of the coil part of the present invention;

[0032] Figure 6The flowchart of the multi-coil multiplexing type radio power receiving device of the present invention;

[0033] Figure 7-Figure 11 The circuit diagram of the multi-coil multiplexing type radio power receiving device of the present invention is shown in FIG. DETAILED DESCRIPTION

[0034] In order to more clearly and completely illustrate the technical solution of the present invention, the present invention is further described below in conjunction with the accompanying drawings.

[0035] Please refer to Figure 1-Figure 2 The present invention proposes a radio power receiving method and a multi-coil multiplexed radio power receiving device using the method, wherein the multi-coil multiplexed radio power receiving device comprises a receiving rectifier 10, a multiplexer 20, a communication and control device 30, and a load output terminal 40. The receiving rectifier comprises a plurality of coils 11 and a plurality of rectifier units 12 electrically connected to the coils 11, wherein the plurality of coils 11 receive radio signals from a transmitting base station, and the plurality of rectifier units 12 rectify and convert the AC signals received by the coils 11 into DC signals; the multiplexer 20 collects the DC signals processed by the rectifier units 12 and outputs DC power, supplies power to the communication and control device 30, and inputs the DC power into the load output terminal 40; the communication and control device 30 communicates with the multiplexer 20, processes the signals from the multiplexer 20, and sends a control signal to the multiplexer 20; the load output terminal 40 receives the DC power processed by the multiplexer 20, and outputs the DC power to the outside, providing power to external devices.

[0036] Furthermore, a communication terminal 13 is provided between the receiving and rectifying device and the multiplexer device, and the multiplexer device 20 performs signal modulation on the multiple coils 11 through the communication terminal 13 .

[0037] Furthermore, the plurality of coils 11 can be placed according to user needs.

[0038] For details, please refer to Figure 3-Figure 6, the multiple coils 11 are receiving coils, which inductively receive electrical signals from the radio power transmission transmitting base station, and the electrical signals are AC signals. The multiple coils 11 can be placed accordingly according to the needs of the shell shape that the user likes. One coil 11 is electrically connected to a rectifier unit 12 to form a rectifier circuit, so the receiving rectifier device 10 includes multiple rectifier circuits. In the process of receiving the electrical signal from the transmitting base station, there is always one coil among the multiple coils 11 that is more "aligned" with the transmitting coil of the transmitting base station. At this time, the coil receives the main electrical signal, and the remaining coils assist in receiving; the multiple rectifier units 12 integrate the AC signals received by the coils 11 from the transmitting base station, and convert them into DC currents and send them to the multiplexer device 20; the multiplexer device 20 is a multiplexer device, and the multiplexer device 20 concentrates the DC currents processed by the multiple rectifier units 12 and outputs them, on the one hand, providing power to the communication and control device 30 so that it can function normally The receiving rectifier 10 communicates with the multiplexer 20 through the communication terminal 13, and the multiplexer 20 communicates with the communication and control device 30. The receiving rectifier 10 transmits the signal to the multiplexer 20 and finally transmits it to the communication and control device 30. The communication and control device 30 sends a modulation signal, and the multiplexer 20 receives the modulation signal and performs communication modulation on the coil 11, thereby realizing the monitoring and modulation of the entire process of receiving and converting electrical signals by the communication and control device. The communication and control device 30 also feeds back the signal data to the radio power transmission base station for power adjustment and abnormal data processing for the radio power transmission base station. The load output terminal 40 is the final end of the multi-coil multiplexed radio power receiving device, which is used to output electrical loads to the outside and provide DC power for external equipment.

[0039] In this embodiment, the multi-coil multiplexed radio power receiving device of the present invention utilizes a multiplexer device 20 to enable multiple receiving coils 11 to work simultaneously and output the electric energy received by the multiple coils 11 in a concentrated manner. Regardless of whether the coil of the transmitting base station is "aligned" with any side coil of the multiple receiving coils or "aligned" with the middle coil of the multiple coils, radio power transmission can be performed normally, and neither traditional magnetic guidance "alignment" nor power-driven transmitting coil "alignment" is required, thereby achieving the purpose of truly no need for "alignment" and arbitrary placement, and the structure is simplified.

[0040] In this embodiment, the multi-coil multiplexed radio power receiving device of the present invention utilizes the communication and control device 30 to control the communication of each component device of the entire multi-coil multiplexed radio power receiving device, and monitor the electrical signal conditions of each component device. If an abnormality occurs in the electrical signal, the communication and control device will send a corresponding modulation signal to enable each component device to work stably and normally, and feed back the monitored electrical signal to the transmitting base station, forming a cyclic feedback adjustment and continuous and stable transmission radio power transmission system.

[0041] Furthermore, the plurality of coils 11 are divided into a main coil 110 and a secondary coil 111 . The main coil 110 receives the main radio power, and the secondary coil 111 receives the marginal diffused power of the main coil 110 .

[0042] Furthermore, the plurality of coils 11 are any one of coil windings wound by wires and printed coils embedded in PCB stacks.

[0043] For details, please refer to Figure 3-Figure 5 A single coil "aligned" with the transmitting coil serves as a main coil 110 to receive the main radio power from the transmitting base station, while multiple receiving coils located around the main coil serve as secondary coils 111 to automatically capture the diffused power at the edge of the main coil 110; the coil 10 can be a coil winding wound by a wire, or a printed coil embedded in a PCB stack, without the need for a special coil manufacturing process.

[0044] In this embodiment, the main coil 110 mainly receives the main radio power from the transmitting base station, and the secondary coil 111 located around the main coil 110 captures the diffused power at the edge of the main coil, which not only improves the overall efficiency of radio power transmission, but also improves the thermal stability of the entire transmission loop; the coil 10 can be a coil winding wound by a wire, or a printed coil embedded in a PCB stack, without the need for a special coil manufacturing process, so the coils widely used in the market are suitable for the multiple coils 11 of the present invention, so the manufacturing cost is low.

[0045] Furthermore, the load output end is also provided with a sensor 41, and the sensor 41 is used to monitor the voltage, current and temperature of the load output end.

[0046] Furthermore, a signal transmission line 50 is provided between the load output terminal 40 and the communication and control device 30 , and the signal transmission line 50 transmits the monitoring signal of the sensor to the communication and control device 30 .

[0047] In this embodiment, the load output end 40 is also provided with a sensor 41, and the sensor 41 is used to monitor the voltage, current and temperature of the load output end 40. By monitoring these three parameters, it is ensured that the load output of the load output end 40 can remain stable, and the monitored signal is transmitted to the communication and control device 30 through the signal transmission line 50. Once the monitored signal exceeds the normal range, the communication and control device 30 starts feedback modulation, so that the multi-coil multiplexing radio power receiving device can work normally.

[0048] Of course, the present invention may have many other implementations. Based on this implementation, other implementations obtained by ordinary technicians in this field without any creative work are all within the scope of protection of the present invention.

Claims

1. A radio power receiving method, characterized in that: The radio power receiving method comprises: The receiving coil receives the AC signal from the transmitting base station; The alternating current signal received by the receiving coil is rectified and converted into a direct current signal by a rectifying unit; The DC signals processed by the multiple rectifier units are concentrated, and multiplexing of the multiple receiving coils is realized through the multiplexer unit; The communication and control unit modulates the multiplexer unit and the receiving coil, feeds back the electrical signal data to the transmitting base station, and monitors the load output end. Once the electrical signal at the load end is abnormal, the communication and control unit starts to adjust the feedback work.

2. A multi-coil multiplexing radio power receiving device, applying the radio power receiving method according to claim 1, characterized in that: The multi-coil multiplexing type radio power receiving device comprises: A receiving rectifier device, comprising a plurality of coils and a plurality of rectifier units electrically connected to the plurality of coils, the plurality of coils receiving radio signals from a transmitting base station, the plurality of rectifier units rectifying and converting the AC signals received by the coils into DC signals; A multiplexer device, which collects the DC signals processed by the plurality of rectifying units and outputs DC power to supply power to the communication and control device and input the DC power to the load output terminal; A communication and control device, communicating with the multiplexer device, processing the signal from the multiplexer device, and the multiplexer device sends a control signal; The load output terminal receives the direct current processed by the multiplexer device and outputs the direct current to provide power to external devices.

3. The multi-coil multiplexing type radio power receiving device according to claim 2, characterized in that: A communication terminal is also provided between the receiving and rectifying device and the multiplexer device, and the multiplexer device performs signal modulation on the multiple coils through the communication terminal.

4. The multi-coil multiplexing type radio power receiving device according to claim 2, characterized in that: The multiple coils can be placed according to user needs.

5. The multi-coil multiplexing type radio power receiving device according to claim 4, characterized in that: The plurality of coils are divided into a main coil and a secondary coil, wherein the main coil receives a main radio power, and the secondary coil receives a diffused power at the margin of the main coil.

6. The multi-coil multiplexing type radio power receiving device according to claim 5, characterized in that: The plurality of coils are any one of coil windings wound by wires and printed coils embedded in a PCB stack.

7. The multi-coil multiplexing type radio power receiving device according to claim 2, characterized in that: The load output end is also provided with a sensor, and the sensor is used to monitor the voltage, current and temperature of the load output end.

8. The multi-coil multiplexing type radio power receiving device according to claim 7, characterized in that: A signal transmission line is also provided between the load output end and the communication and control device, and the signal transmission line transmits the monitoring signal of the sensor to the communication and control device.

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