Transmitting end working mode control method of energy flow track wireless electric energy transmission system

Abstract

The invention belongs to the technical field of dynamic wireless power transmission, and discloses a transmitting end working mode control method of an energy flow track wireless power transmission system, which comprises the following steps: acquiring signal data output by a transmitting end in the power transmission system in real time; wherein the transmitting end comprises a pre-stage circuit, an energy flow track and an energy flow track load which are connected in sequence, and the working modes of the energy flow track comprise a low-power-consumption standby mode and a high-power output mode; and the working mode of the energy flow track is judged and switched based on the loading state of the energy receiving structure of the energy flow track in combination with signal data output in real time. According to the technical scheme, the working principle of a wireless power transmission system based on an energy flow track is combined, and the method has the advantage of low complexity.

Description

Technical Field

[0001] The present invention belongs to the technical field of dynamic wireless power transmission, and in particular relates to a method for controlling a transmitter operating mode of an energy flow track wireless power transmission system. Background Art

[0002] In recent years, dynamic wireless power transmission technology has attracted attention in order to solve the problem of equipment endurance during exercise.

[0003] The core working principle of the existing dynamic wireless power transmission technology is that the energy transmitting side and the energy receiving side can achieve resonance at the same operating frequency, and on this basis, the power energy is wirelessly transmitted between the transmitting side and the receiving side. Based on this working principle, two main dynamic wireless power transmission system structures have been developed: one is a distributed multi-coil structure on the transmitting side, and the other is a long track coil structure. The specific forms of these two structures are as follows: Figure 1 shown.

[0004] However, the control of the operating mode of the transmitting side of the above two structures is more complicated. They both require communication between the transmitting side and the receiving side to control the operating mode of the transmitting side coil. This communication method may include but is not limited to Bluetooth and Zigbee. In particular, in the structure with distributed multi-coils on the transmitting side, the size design of the transmitting side coil and the receiving side coil often adopts an asymmetric method that does not correspond one to one. Therefore, in order to ensure that the receiving side can draw power stably, the number of coils working simultaneously on the transmitting side track must be greater than 1. A specific example is: when the energy receiving side contains only one coil (such as Figure 2 As shown in the figure, and its center position is directly opposite to the center position of a coil of the transmitting side track, the coil of the transmitting side track and its previous and next coils need to work at the same time, that is, the transmitting side track needs to have three coils working at the same time. As the receiving side moves along the transmitting side track, the three transmitting side coils working at the same time need to be continuously switched to achieve stable energy supply for the receiving side load. It is worth noting that if the receiving side contains multiple coils, then the number of coils working at the same time on the transmitting side track will be greater (such as Figure 3 This will undoubtedly further increase the complexity of the control of the launch side track working mode. Figure 4 As shown in the figure, the length of the transmitting side track coil is much longer than the total length of the receiving side coupling coil. Under this structure, the control of the transmitting side coil not only involves the positioning of the receiving side, but also includes the pre-opening of the next section of the transmitting side coil. In summary, the control of the operating mode of the transmitting side coil of the two existing structures is heavily dependent on the communication between the transmitting side and the receiving side, and requires precise positioning of the receiving side, which makes the control method quite complicated.

[0005] In addition to the above principles and the two types of structures extended from them, there is also a wireless power transmission system based on energy flow tracks, which adopts a new working principle and shows broad application potential in scenarios such as highways. The transmitting side track of this system adopts a non-resonant cavity structure, which enables it to achieve long-distance traveling wave power transmission; while the receiving side adopts a dual-resonance (or multi-resonance) cavity structure to achieve efficient power output.

[0006] At present, the control method for the energy flow track working mode of the transmitting side of the wireless power transmission system based on the energy flow track is still in a technical blank state. The existing two types of structured transmitting side control methods are overly dependent on the communication with the receiving side and the positioning of the receiving side, which increases the overall complexity and is not suitable for direct application to the wireless power transmission system based on the energy flow track. Therefore, developing a low-complexity control method for the transmitting side energy flow track working mode will become the focus of research. Summary of the invention

[0007] The purpose of the present invention is to provide a method for controlling the operating mode of a transmitter of an energy flow track wireless power transmission system to solve the problems existing in the above-mentioned prior art.

[0008] To achieve the above object, the present invention provides a method for controlling the operating mode of a transmitter of an energy flow track wireless power transmission system, comprising:

[0009] Acquire signal data outputted in real time by a transmitter in an electric energy transmission system; wherein the transmitter comprises a preceding circuit, an energy flow track and an energy flow track load connected in sequence, and the working modes of the energy flow track comprise a low power standby mode and a high power output mode;

[0010] The working mode of the energy flow track is judged and switched based on the loading state of the energy receiving structure of the power transmission system and the real-time output signal data.

[0011] Optionally, the signal data is electrical parameters of the signal transmitted to the energy flow track load, including power data, voltage data and current data.

[0012] Optionally, the signal frequency of the AC signal output by the front-stage circuit is set based on the operating frequency of the power transmission system.

[0013] Optionally, switching control of the working mode of the energy flow track is performed based on the loading state of the energy receiving structure of the energy flow track in combination with the real-time output signal data, specifically including:

[0014] Based on the driving-in or driving-out state of the energy receiving structure, the working mode of the energy flow track is judged and switched by comparing the signal data output in real time with the preset threshold.

[0015] Optionally, based on the driving-in or driving-out state of the energy receiving structure, the comparison result of the real-time output signal data and the preset threshold value is used to judge and switch the working mode of the energy flow track, specifically including:

[0016] When the energy receiving structure enters the energy flow track, and the signal data output by the energy flow track in real time is less than or equal to the preset lower limit threshold, the output of the previous stage circuit is changed through the feedback mechanism, so that the working mode of the energy flow track is switched to the high power output mode;

[0017] When the energy receiving structure leaves the energy flow track and the signal data output by the energy flow track in real time is greater than or equal to a preset upper limit threshold, the output of the previous circuit is changed through a feedback mechanism, so that the working mode of the energy flow track is switched to a low-power standby mode.

[0018] Optionally, the AC signal output by the front-stage circuit corresponding to the low-power standby mode includes a square wave, a triangle wave and a sine wave.

[0019] The technical effects of the present invention are:

[0020] The control method provided by the present invention combines the working principle of the wireless power transmission system based on the energy flow track, and the control method has the advantage of low complexity;

[0021] The control method provided by the present invention does not need to switch the working mode of the energy flow track of the transmitting side through the communication mode between the transmitting side and the receiving side;

[0022] The control method provided by the present invention does not require positioning of the receiving side device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 The structure of the existing dynamic wireless power transmission system is shown in FIG. Figure 1 (a) is a distributed multi-coil structure. Figure 1 Middle (b) is the long track coil structure;

[0026] Figure 2 The relative positions of the transmitting and receiving coils and the operating mode of the transmitting coil when only one coil is used on the receiving side in a system based on a distributed multi-coil structure on the transmitting side;

[0027] Figure 3 When the receiving side uses multiple coils (taking 2 as an example) in a system based on a distributed multi-coil structure on the transmitting side, the relative positions of the transmitting side and receiving side coils and the transmitting side coil working mode;

[0028] Figure 4 The relative positions of the transmitting and receiving coils and the operating mode of the transmitting coil when the transmitting side adopts a long track coil structure;

[0029] Figure 5 It is a system block diagram of a wireless power transmission system based on energy flow track;

[0030] Figure 6 This is a working scene diagram when the energy flow track in the present invention is not loaded with an energy receiving structure;

[0031] Figure 7 A working scene diagram of the energy flow track in the present invention when the energy receiving structure is loaded;

[0032] Figure 8 This is a working scene diagram when the energy flow track in the present invention is only loaded with the resonator 1 in the energy receiving structure;

[0033] Fig. 9 This is a flow chart of the transmitter operation mode control in the present invention.

[0034] Explanation of reference numerals: 101, energy transmitting structure; 102, front-stage circuit at power supply end; 103, energy flow track; 104, energy flow track load; 105, energy receiving structure; 106, first resonator; 107, second resonator; 108, receiving end load. DETAILED DESCRIPTION

[0035] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but should be understood as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0036] It should be understood that the terms described in the present invention are only for describing special embodiments and are not intended to limit the present invention. In addition, for the numerical range in the present invention, it should be understood that each intermediate value between the upper and lower limits of the scope is also specifically disclosed. Each smaller range between the intermediate value in any stated value or stated range and any other stated value or intermediate value in the described range is also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded in the scope.

[0037] Unless otherwise indicated, all technical and scientific terms used herein have the same meanings as those of ordinary skill in the art generally understood by the present invention. Although the present invention describes only preferred methods, any method similar or equivalent to that described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods related to the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0038] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention description without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention description will be apparent to those skilled in the art. The present application description and examples are exemplary only.

[0039] The words “include,” “including,” “have,” “contain,” etc. used in this article are open-ended terms, meaning including but not limited to.

[0040] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] Embodiment 1

[0042] like Figure 1 - Fig. 9 As shown, this embodiment provides a method for controlling the operating mode of the transmitter of an energy flow track wireless power transmission system, including: obtaining signal data output in real time by the transmitter in the power transmission system; wherein the transmitter includes a pre-stage circuit, an energy flow track and an energy flow track load connected in sequence, and the operating mode of the energy flow track includes a low-power standby mode and a high-power output mode; based on the loading state of the energy receiving structure of the power transmission system combined with the real-time output signal data, the operating mode of the energy flow track is judged and switched.

[0043] This embodiment proposes a control method for the working mode of the energy flow track on the transmitting side in the wireless power transmission system based on the energy flow track. This control method can enable the energy flow track to operate in a low-power standby mode or a high-power output mode in different working scenarios. This embodiment proposes the switching conditions of the working mode control method in combination with the working principle of the wireless power transmission system based on the energy flow track. Compared with the control method of the working mode of the transmitting side track in the traditional dynamic wireless power transmission system, the control method proposed in this embodiment does not rely on the positioning of the receiving side by the communication between the transmitting side and the receiving side, and has the advantage of low complexity.

[0044] This embodiment discloses a control method for the operating mode of the energy flow track on the transmitting side, which can be applied to a wireless power transmission system based on the energy flow track. The disclosed control method is based on the operating principle of the wireless power transmission system based on the energy flow track, and realizes the control of the operating state of the energy flow track on the transmitting side with low complexity.

[0045] This embodiment is based on the working principle of the wireless power transmission system of the energy flow track, and realizes the control of the working state of the energy flow track on the transmitting side. The specific control method of this embodiment is as follows:

[0046] 1. According to different working scenarios of the transmitting side energy flow track, its working mode switches between low-power standby mode and high-power output mode;

[0047] 1.1. When the working mode of the energy flow track meets the judgment condition for switching to the low-power standby mode, the output of the front-stage circuit at the power supply end is changed so that it outputs a signal with a certain frequency and a certain power;

[0048] 1.2. When the working mode of the energy flow track meets the judgment condition for switching to the high-power output mode, the output of the front-stage circuit at the power supply end is changed to make it output the system power;

[0049] 2. The control of the output of the front-stage circuit at the power supply end can be achieved by a feedback mechanism or by transmitting control signals via wireless communication.

[0050] Different operating modes of the energy flow track on the transmitting side include: low-power standby mode and high-power output mode, and conversion can be performed between the low-power standby mode and the high-power output mode.

[0051] The low-power standby mode is applicable to the following working scenarios: when there is no equipment with the receiving side structure required by the system loaded on the energy flow track; the low-power standby mode is that the front-stage circuit at the power supply end outputs a signal with a certain frequency and a certain power.

[0052] The signal includes but is not limited to: square wave, triangle wave, sine wave, etc., and the frequency of the signal is the operating frequency of the system;

[0053] Preferably, the frequency of the signal is close to the operating frequency of the system.

[0054] The high-power output mode is applicable to the following working scenarios: when there is a device loaded with the receiving side structure required by the system loaded on the energy flow track;

[0055] The high power output mode is a mode in which the front-stage circuit at the power supply end outputs system power. The output power of the high power output mode is much higher than the signal transmission power of the low power standby mode.

[0056] The condition for switching from the low-power standby mode to the high-power output mode is: when the device loaded with the receiving side structure required by the system enters the energy flow track;

[0057] The determination condition for switching from the low power standby mode to the high power output mode is: the average power transmitted to the energy flow track load is less than (or less than or equal to) a given lower limit threshold;

[0058] The conditions for determining whether the low-power standby mode is switched to the high-power output mode include, but are not limited to: the average voltage and average current of the energy flow track load are less than (or less than or equal to) a given lower threshold.

[0059] The condition for the high-power output mode to switch to the low-power standby mode is: when all devices loaded with the receiving side structure required by the system leave the energy flow track;

[0060] The determination condition for the conversion from the high power output mode to the low power standby mode is: the average power transmitted to the energy flow track load is greater than (or greater than or equal to) a given upper limit threshold;

[0061] The conditions for determining whether the high power output mode is switched to the low power standby mode include, but are not limited to: the average voltage and average current of the energy flow track load are greater than (or greater than or equal to) a given upper threshold.

[0062] When the judgment conditions for switching between the low-power standby mode and the high-power output mode are met, the output of the front-stage circuit at the power supply end is changed through a feedback mechanism;

[0063] This embodiment discloses a control method for the operating mode of the energy flow track on the transmitting side, which can be applied to a wireless power transmission system based on the energy flow track. The disclosed control method is based on the operating principle of the wireless power transmission system based on the energy flow track, and realizes the control of the operating state of the energy flow track on the transmitting side with low complexity.

[0064] Specific implementation examples of this embodiment include:

[0065] The wireless power transmission system based on the energy flow track used in this implementation is as follows: Figure 5 As shown, it includes: an energy transmitting structure 101 and an energy receiving structure 105. The energy transmitting structure 101 is composed of a power supply end front stage circuit 102, an energy flow track 103 and an energy flow track load 104; the energy receiving structure 105 is composed of a first resonator 106, a second resonator 107 and a receiving end load 108.

[0066] refer to Figure 6When the energy flow track 103 is not loaded with the energy receiving structure 105, the power energy is transmitted from the front-stage circuit 102 at the power supply end to the energy flow track load 104 via the energy flow track 103. At this time, the working state of the energy flow track is a pure traveling wave state (or because the front-stage circuit 102 at the power supply end, the energy flow track 103 and the energy flow track load 104 are not completely matched, the working state is a traveling standing wave state and the traveling wave is dominant). Figure 7 , when the energy flow track 103 loads the energy receiving structure 105, or reference Figure 8 When the energy flow track 103 is only loaded with the first resonator 106, the power energy transmitted to the energy flow track load 104 is cut off at the first resonator 106. At this time, the working state of the energy flow track is a pure standing wave state (or because the power energy is not completely cut off, the working state is a traveling standing wave state and the standing wave is dominant).

[0067] refer to Figure 6 , 7 and 8, the working state of the energy flow track 103 can be determined by the power condition of the energy flow track load 104.

[0068] Different working scenarios of the energy flow track 103 can be determined according to the working state of the energy flow track 103 , that is, whether the energy flow track 103 is loaded with or not loaded with the energy receiving structure 105 .

[0069] According to different working scenarios of the energy flow track 103 , the energy flow track is made to work in different working modes: a low power standby mode and a high power output mode.

[0070] When the working scenario is that the energy flow track 103 is not loaded with the energy receiving structure 105, the energy flow track 103 is operated in a low-power standby mode, that is, the front-stage circuit 102 at the power supply end outputs a signal with a certain frequency and a certain power. The signal includes but is not limited to: square wave, triangle wave, sine wave, etc. The frequency of the signal is equal to the operating frequency of the system. It can be implemented that the frequency of the signal is a frequency close to the operating frequency of the system.

[0071] When the working scenario is that the energy flow track 103 loads the energy receiving structure 105, the energy flow track 103 is operated in the high power output mode, that is, the power supply end front stage circuit 102 outputs the system power. The output power when operating in the high power output mode is much higher than the power of the transmitted signal when operating in the low power standby mode.

[0072] When the working scenario of the energy flow track 103 changes, the working modes of the energy flow track 103 need to be converted accordingly, including conversion from low power standby mode to high power output mode and conversion from high power output mode to low power standby mode.

[0073] Available, reference Figure 8, when only the first resonator 106 is fully or partially loaded on the energy flow track 103, the working mode of the energy flow track 103 is converted from the low power standby mode to the high power output mode. The judgment condition for the conversion is: the average power transmitted to the energy flow track load 104 is less than (or less than or equal to) a given lower limit threshold. The judgment condition may include but is not limited to: the average power, average voltage, average current, etc. of the energy flow track load is less than (or less than or equal to) a given lower limit threshold.

[0074] It is feasible that when the energy receiving structure 105 is away from the energy flow track 103, the working mode of the energy flow track 103 is switched from the high power output mode to the low power standby mode. The judgment condition for the switch is: the average power transmitted to the energy flow track load is greater than (or greater than or equal to) a given upper limit threshold. It is feasible that the judgment condition includes but is not limited to: the average power, average voltage, average current, etc. of the energy flow track load is greater than (or greater than or equal to) a given upper limit threshold.

[0075] It is feasible that when the determination conditions for switching between the low-power standby mode and the high-power output mode are met, the output of the front-stage circuit at the power supply end can be changed through a feedback mechanism.

[0076] Compared with the existing control of the transmitting side coil working mode based on the distributed multi-coil structure and the long track coil structure system, the advantages of this embodiment are:

[0077] The control method disclosed in this embodiment combines the working principle of the wireless power transmission system based on the energy flow track, and the control method has the advantage of low complexity;

[0078] The control method disclosed in this embodiment does not need to realize the switch control of the feeding circuit of each coil on the transmitting side through the communication between the transmitting side and the receiving side;

[0079] The control method disclosed in this embodiment does not require positioning of the receiving-side device.

[0080] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for controlling the operating mode of a transmitter of an energy flow track wireless power transmission system, characterized in that: include: Acquire signal data outputted in real time by a transmitter in an electric energy transmission system; wherein the transmitter comprises a preceding circuit, an energy flow track and an energy flow track load connected in sequence, and the working modes of the energy flow track comprise a low power standby mode and a high power output mode; The working mode of the energy flow track is judged and switched based on the loading state of the energy receiving structure of the power transmission system and the real-time output signal data.

2. The method for controlling the operating mode of the transmitter of the energy flow track wireless power transmission system according to claim 1, characterized in that: The signal data is the electrical parameters of the signal transmitted to the energy flow track load, including power data, voltage data and current data.

3. The method for controlling the operating mode of the transmitter of the energy flow track wireless power transmission system according to claim 1, characterized in that: The signal frequency of the AC signal output by the front-stage circuit is set based on the operating frequency of the power transmission system.

4. The method for controlling the operating mode of the transmitter of the energy flow track wireless power transmission system according to claim 1, characterized in that: The switching control of the working mode of the energy flow track is performed based on the loading state of the energy receiving structure of the energy flow track in combination with the real-time output signal data, specifically including: Based on the driving-in or driving-out state of the energy receiving structure, the working mode of the energy flow track is judged and switched by comparing the signal data output in real time with the preset threshold.

5. The method for controlling the operating mode of the transmitter of the energy flow track wireless power transmission system according to claim 4, characterized in that: Based on the entry or exit state of the energy receiving structure, the comparison result of the real-time output signal data and the preset threshold value is used to judge and switch the working mode of the energy flow track, which specifically includes: When the energy receiving structure enters the energy flow track, and the signal data output by the energy flow track in real time is less than or equal to the preset lower limit threshold, the output of the previous stage circuit is changed through the feedback mechanism, so that the working mode of the energy flow track is switched to the high power output mode; When the energy receiving structure leaves the energy flow track and the signal data output by the energy flow track in real time is greater than or equal to a preset upper limit threshold, the output of the previous circuit is changed through a feedback mechanism, so that the working mode of the energy flow track is switched to a low-power standby mode.

6. The method for controlling the operating mode of the transmitter of the energy flow track wireless power transmission system according to claim 5, characterized in that: The AC signal output by the front-stage circuit corresponding to the low-power standby mode includes a square wave, a triangle wave and a sine wave.

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