Electromagnetic coupling energy transmission system

Abstract

An electromagnetic coupling energy transmission system is characterized by comprising an energy output device and an energy input device, and is provided with a first electric energy conversion module, a second electric energy conversion module, a first control module, a second control module, an electromagnetic coupling energy transmission module and an electric field coupling communication module, and the first control module and the second control module adopt an electric field coupling communication module subjected to antenna optimization or feeder line optimization as one of physical link links for signal transmission, and adopt at least a double-frequency-band frequency modulation type modulation mode to accurately transmit power regulation guidance information in the electromagnetic coupling energy process in real time.

Description

Technical Field

[0001] The present invention relates to an electromagnetic coupling energy transmission system which uses at least dual-frequency frequency modulation signals to simultaneously transmit power regulation guidance signals and digital status signals, and in particular to a signal source modulation algorithm of at least dual-frequency frequency modulation, as well as an optimized antenna and optimized feeder design scheme for realizing frequency modulation signal transmission. Background Art

[0002] In the electromagnetic coupling energy transmission system, an electric field coupling communication module is used for signal transmission. Although it has the advantages of being not easily affected by external interference, having a very small external interference range, and the communication carrier frequency can be higher than the alternating current used for electromagnetic coupling energy transmission, thereby realizing real-time transmission of power control related signals, the disadvantages are also very obvious: for example, when the electric field coupling communication module and the electromagnetic coupling energy transmission module are very close due to the volume limitation of the device in reality, because the coil of the electromagnetic coupling energy transmission module will generate an alternating electric field near the coil when working, and the alternating electric field generated by the coil has the characteristics of low impedance and high voltage, it will seriously pollute the signal electric field of the electric field coupling communication module, and then seriously distort the effective signal, causing the signal-to-noise ratio to drop sharply or even the noise to submerge the signal, resulting in the electromagnetic coupling energy transmission system failing to work, energy transmission overload, underpower and other adverse results.

[0003] In order to overcome the interference of the electric field generated by the coil when it is working, ordinary technicians will easily think of using a differential electric field solution. The specific implementation method is: a pair of electric field coupling communication modules for transmitting differential signals are set on both sides of the coil, generally using two pairs of identical opposite electrodes. However, this differential electric field solution has the following problems in actual use: During operation, because the alternating electric field strength generated on both sides of the coil is significantly different, and this electric field strength difference changes with the working state of the coil, the electric signals output by the electric field coupling communication modules on both sides of the coil do not have common mode signals that can cancel each other, which makes it impossible to identify and extract signals through low-cost differential detection circuits. The detection circuit that can solve the above problem will be very complex and the cost will be very high.

[0004] When the electric field coupling communication module is immersed in a conductor, or there is a conductor in the area of ​​the electric field coupling communication module, there will be obvious coupling between the differential electric fields, and the signal transmitted by the electric field coupling communication module will be severely distorted or even disappear completely, so information cannot be transmitted. For example, in an outdoor rainy environment, when charging an electric vehicle through an electromagnetic coupling energy transmission system designed with differential electric field signal transmission, the differential electric field will almost disappear due to the continuous water film on the surface of the electric vehicle and the shell surface of the energy output device.

[0005] When the energy output device and energy input device of the electromagnetic coupling energy transmission system are combined at any angle, or rotate relative to the magnetic field center axis of the electromagnetic coupling energy transmission module during operation, the differential electric field distribution is likely to change dramatically or even disappear completely. For example, when a drone lands on the apron for electromagnetic coupling energy transmission charging, the drone is likely to rotate at a certain angle, causing a significant change in the differential electric field distribution.

[0006] On the other hand, when the electromagnetic coupling energy transmission system is working, it is often necessary to convert the load status of the energy receiving end, such as the voltage, current, temperature, number and other information of the battery pack, into a digital signal and transmit it to the energy output end regularly, and then transmit it to a distant place through the network through the energy output end. Therefore, the electromagnetic coupling energy transmission system that uses an electric field coupling communication module for signal transmission needs to be able to transmit digital signals while continuously transmitting power regulation signals.

[0007] Therefore, it is necessary to invent a new type of electromagnetic coupling energy transmission, which has the ability to resist self-coil interference and environmental damage, and has the ability to simultaneously transmit power regulation signals and digital signals. Summary of the invention

[0008] The present invention discloses an electromagnetic coupling energy transmission system, which is characterized in that it includes an energy output device and an energy input device, and has a first electric energy conversion module, a second electric energy conversion module, a first control module, a second control module, an electromagnetic coupling energy transmission module, and an electric field coupling communication module. The first control module has a first program, and the first program generates a first control signal according to preset parameters, the characteristics of the first electric signal output from the first electric energy conversion module, and the part related to power regulation in the second information generated by the second control module; and the first control module also has a first demodulation scheme, and the first demodulation scheme has a signal detection circuit, a channel demodulation module, and a source demodulation module.

[0009] The second control module has a second program, and the second program generates the second information according to preset parameters and characteristics of a second electrical signal output from the second electric energy conversion module.

[0010] The electromagnetic coupling energy transmission module comprises a first coil module and a second coil module, and performs energy transmission through the principle of "alternating current-alternating magnetic field coupling-alternating current".

[0011] The electric field coupling communication module comprises a first group of electrode sheets and a second group of electrode sheets. The first group of electrode sheets and the second group of electrode sheets are close to each other and basically face each other, and communication signals are transmitted through the principle of "changing voltage-changing electric field coupling-changing voltage". The first group of electrode sheets includes at least electrode sheet No. 11, and the second group of electrode sheets includes at least electrode sheet No. 21. The electrode sheet No. 11 and the electrode sheet No. 21 are conductors.

[0012] The first power conversion module, the first control module, the first coil module and the first group of electrode sheets constitute an energy output device; the second power conversion module, the second control module, the second coil module and the second group of electrode sheets constitute an energy output device.

[0013] The second information includes first sub-information A and second sub-information B, the first sub-information A is power regulation guidance information, and the second sub-information B contains one or a combination of data such as the real-time status of the load, the characteristics and number of the energy receiving device, etc.

[0014] The second control module has a second modulation scheme, the second modulation scheme has a source modulation module, a channel modulation module and a signal power amplifier circuit, the second control module obtains a second modulation signal through the second modulation scheme using the second information, and the second modulation signal is characterized by a frequency modulation signal.

[0015] The reason why the second modulation signal adopts the frequency modulation type is that since electrode sheet No. 11 and electrode sheet No. 12 are often very close to the electromagnetic coupling energy transmission module, and the first coil module and the second coil module of the electromagnetic coupling energy transmission module will generate a low-impedance high-frequency alternating electric field nearby when working, causing the electric field between electrode sheet No. 11 and electrode sheet No. 12 and the nearby electric field to be severely distorted, resulting in serious distortion of the signal waveform received by electrode sheet No. 11, including voltage amplitude jitter and waveform distortion. Therefore, it is not feasible to use duty cycle adjustment and amplitude modulation as the second modulation scheme. Although the waveform phase will not be disturbed in a longer period of time, considering the communication code rate requirements and the actual cost requirements, it is optimal to choose a frequency modulation scheme that is less susceptible to interference and easier to modulate and demodulate as the second modulation scheme.

[0016] Therefore, the second modulation scheme is characterized by having a function Ft=F(at,bt). Within any time slot t, Ft is the waveform of the second modulation signal at this time slot t, Ft has voltage and frequency characteristics, at is the value of the first sub-information A at this time slot t, and bt is the number of bits of the second sub-information B at this time slot t.

[0017] The characteristic of the F(a,b) function is that when it is reflected in the rectangular coordinate system with the horizontal coordinate a and the vertical coordinate F(a,b), the range of a is a rational number from am to aM, and when b=bit n, the corresponding F(a,b) is a rational number from Famn to FaMn, where n is an integer greater than or equal to 0. Moreover, under any value of n, the change from Famn to FaMn is monotonic, and under all values ​​of n, the direction of change from Famn to FaMn is consistent. And, taking any two bit values ​​i and j, the projection Shai of the curve or straight line from Fami to FaMi on the vertical axis and the projection Shaj of the curve or straight line from Famj to FaMj on the vertical axis do not overlap.

[0018] For example: For example, the value range of the first sub-information A is a1, a2, and a3. When b is bit 0 in F=F(a,b) and a is a1, a2, and a3 respectively, F is F1, F2, and F3 respectively. When b is bit 1 in F=F(a,b) and a is a1, a2, and a3 respectively, F is F4, F5, and F6 respectively, and the six numbers from F1 to F6 are different. Assuming that the second sub-information B is a binary character composed of four bits, such as 0110, the following corresponding table can be obtained by using the second modulation scheme. As shown in the above table, the second control module sends frequency values ​​F1, F5, F6, and F2 to the electrode sheet No. 21 according to the time slice beat, and the first control module can accurately receive and identify the first sub-information A as a1, a2, a3, a2 and the second sub-information B as 0110 in the corresponding time slice. Therefore, the second modulation scheme disclosed in the present invention can use a frequency modulation scheme to efficiently and highly resist interference to simultaneously transmit the first sub-information A and the second sub-information B.

[0019] When the electromagnetic coupling energy transmission system described in the present invention is working, the first control module generates the first control signal to control the first power conversion module to convert the first electric energy input from the outside into a first alternating current and provide it to the first coil module of the electromagnetic coupling energy transmission module, and the second coil module then generates a second alternating current and provides it to the second power conversion module for conversion into a second electric energy for powering the load.

[0020] The second control module collects the electrical signal characteristics of the second electrical energy and generates the second information according to the second program, then generates the second modulation signal through the second modulation scheme and provides it to electrode sheet No. 21, and the electrode sheet No. 11 then generates the first modulation signal and transmits it to the first control module.

[0021] The first control module obtains the second information by subjecting the first modulated signal to a first demodulation scheme, and provides the power regulation-related portion of the second information to the first program to instruct the first program to generate the first control signal.

[0022] For applications of using the electromagnetic coupling energy transmission system disclosed in the present invention to charge batteries and transmit power to slowly varying power loads, preferably, the first sub-information A is the power step value related parameters that the first power conversion module needs to adjust calculated by the second program, and the range of the first sub-information A is from -a to a, where a is a rational number.

[0023] For the application of using the electromagnetic coupling energy transmission system disclosed in the present invention to transmit power to a power transient load, the first sub-information A and the second program calculate the preset power value related parameters that the first power conversion module needs to jump to, and the range of the first sub-information A is from b to c, where b and c are both rational numbers.

[0024] In reality, the energy output device and the energy input device that can be matched to work may have multiple models respectively. When the energy output devices and energy input devices of different models are matched and combined into an electromagnetic coupling energy transmission system, the coupling coefficients of the electromagnetic coupling energy transmission module will also be multiple. For example, if there are 5 models of the energy output device and the energy input device respectively, then the coupling coefficients will be at most 5 x 5=25.

[0025] Since different coupling coefficients will lead to different power transmission response effects, only when the second program clearly knows the characteristic value of the coupling coefficient or the factor affecting the electromagnetic coupling energy transmission response effect can it accurately calculate the second information and guide the first control module to calculate and accurately adjust the first power conversion module through the first program.

[0026] Therefore, the electromagnetic coupling energy transmission system disclosed in the present invention is characterized in that the first control module also sends first information C to the second control module. The first information C includes one or a combination of data such as the electrical signal characteristics of the first electrical energy, the electromagnetic characteristics of the first coil module, and the response to the first information.

[0027] The first control module has a first modulation scheme, the first modulation scheme has a source modulation module, a channel modulation module and a signal amplifier circuit, and the first control module obtains a third modulation signal by subjecting the first information C to the first modulation scheme. As explained above, the third modulation signal is preferably characterized by a frequency modulation signal.

[0028] The second control module also has a second demodulation scheme, which has a signal detection circuit, a channel demodulation module and a source demodulation module; the second program also generates the second information based on the part of the first information C related to power regulation.

[0029] The first modulation scheme is characterized in that it has a function formula Gt=G(ct). In any time slice t, Gt is the waveform of the third modulation signal at this time slice t, Gt has voltage and frequency characteristics, and ct is the number of bits of the first information C at this time slice t; the characteristic of the G(c) function is that when it is reflected in a rectangular coordinate system with the horizontal axis c and the vertical axis G(c), when the value of ca is bit 0 to bit k, the corresponding G(c) changes monotonically from G0 to Gk, where k is an integer greater than 0.

[0030] For example: for example, the first information C is composed of binary characters, and when c is bit 0 in G=G(c), G is G1, and when c is bit 1 in G=G(c), G is G2, then the binary information 1001 is modulated using the third modulation scheme, and the following correspondence table can be obtained. As shown in the above table, the first control module sends frequency values ​​G2, G1, G1, G2 to the electrode sheet No. 11 according to the time slice beat, and the second control module can accurately receive and identify the true information of the first information C in the corresponding time slice. Therefore, the first modulation scheme disclosed in the present invention can use the frequency modulation scheme to efficiently and highly resist interference to assist in the simultaneous transmission of the first information C.

[0031] When the electromagnetic coupling energy transmission system described in the present invention is working, the first control module generates the third modulation signal and transmits it to the electrode sheet No. 11, and the electrode sheet No. 21 then generates the fourth modulation signal and transmits it to the second control module, and the second control module obtains the first information C by subjecting the fourth modulation signal to the second demodulation scheme, and the second control module extracts the part related to power regulation in the first information C and provides it to the second program, guiding the second program to generate the second information.

[0032] In order to further increase the communication rate and reduce the bit error rate, while keeping the cost basically unchanged and limiting EMI, it is not suitable to use a higher frequency as a carrier, but to generate a clock synchronization beat signal to change the asynchronous communication to synchronous communication. Therefore, the present invention discloses the first modulation scheme and the second modulation scheme, inserting a waveform Fp with special frequency characteristics between adjacent time slices tn and tn+1 as a synchronization timestamp, so that the party receiving the information can accurately extract the information according to the time slice beat, such as forming the following first modulation signals Ft1, Fp, Ft2, Fp, Ft3, Fp, Ft4, Fp, Ft5..., or the third modulation signals Gt1, Fp, Gt2, Fp, Gt3, Fp, Gt4, Fp, Gt5..., which are arranged in time sequence.

[0033] In order to solve the problem of interference between the electromagnetic coupling energy transmission system coil and the electric field coupling communication module when the electromagnetic coupling energy transmission system coil itself is working, the electromagnetic coupling energy transmission system disclosed in the present invention adopts a single electric field to transmit information. At the same time, in order to offset the interference of the coil, the electric field coupling communication module needs to add a common mode inductor. The specific design scheme is as follows: The electromagnetic coupling energy transmission system has a first comparator module, the first comparator module has a first input end and a second input end, the first input end and the second input end of the first comparator module both have or do not have a DC bias circuit; and the first group of electrode sheets also includes a first common mode inductor, the first common mode inductor is arranged on the side of the electrode sheet No. 11 away from the electrode sheet No. 21, and the distance d between the electrode sheet No. 11 and the first common mode inductor is greater than or equal to 1 / 50 of the distance D between the electrode sheet No. 11 and the electrode sheet No. 21; the first common mode inductor is an electrically connected conductor.

[0034] The first input terminal and the second input terminal of the first comparator module are electrically connected to the No. 11 electrode sheet and the first common mode inductor respectively, and the output terminal of the first comparator module is used to output the first modulation signal. In practice, preferably, the first common mode inductor can be an electrode sheet, which is set to be No. 12 electrode sheet here.

[0035] When the electromagnetic coupling energy transmission system described in the present invention is working, after receiving the second modulation signal, electrode sheet No. 21 transmits it to electrode sheet No. 11 and electrode sheet No. 12 through electric field coupling. Because electrode sheet No. 12 is farther away from electrode sheet No. 21, the voltage amplitude of the second modulation signal received by electrode sheet No. 12 will be smaller than the voltage amplitude of the second modulation signal received by electrode sheet No. 11; at the same time, because electrode sheet No. 11 and electrode sheet No. 12 are at basically the same distance from the electromagnetic coupling energy transmission module, they will both be affected by basically the same crosstalk from the electromagnetic coupling energy transmission module. Therefore, electrode sheet No. 11 and electrode sheet No. 12 will output two signals with similar common mode noise but superimposed with the second modulation signal of different voltage amplitudes to the first comparator module, so that the first comparator module can accurately restore the real-time frequency of the second modulation signal as the first modulation signal to output to the first control module.

[0036] When the energy output device of the electromagnetic coupling energy transmission system disclosed in the present invention needs to transmit the first information C to the energy input device, the electromagnetic coupling energy transmission system disclosed in the present invention has a first comparator module and a second comparator module at the same time, the first comparator module has a first input end and a second input end, and the first input end and the second input end of the first comparator module both have or do not have a DC bias circuit; the second comparator module has a first input end and a second input end, and the first input end and the second input end of the second comparator module both have or do not have a DC bias circuit.

[0037] The first control module has a first modulation signal input terminal and a third modulation signal output terminal, and the second control module has a fourth modulation signal input terminal and a second modulation signal output terminal; the first group of electrode sheets also includes a first common-mode inductor, which is an electrically connected conductor; the second group of electrode sheets also includes a second common-mode inductor, which is an electrically connected conductor.

[0038] The first common-mode inductor is arranged on a side of the electrode sheet No. 11 away from the electrode sheet No. 21, and a distance d between the electrode sheet No. 11 and the first common-mode inductor is greater than or equal to 1 / 50 of a distance D between the electrode sheet No. 11 and the electrode sheet No. 21; the second common-mode inductor is arranged on a side of the electrode sheet No. 21 away from the electrode sheet No. 11, and a distance d between the electrode sheet No. 21 and the second common-mode inductor is greater than or equal to 1 / 50 of a distance D between the electrode sheet No. 11 and the electrode sheet No. 21.

[0039] The first modulation signal input terminal is electrically connected to the output terminal of the first comparator module, the third modulation signal output terminal is electrically connected to the electrode sheet No. 11, and the electrode sheet No. 11 is also electrically connected to the first input terminal of the first comparator module through one or a combination of current limiting, DC isolation, and digital control switch circuits, and the first common mode inductor is electrically connected to the second input terminal of the first comparator module; the fourth modulation signal input terminal is electrically connected to the output terminal of the second comparator module, the second modulation signal output terminal is electrically connected to the electrode sheet No. 21, and the electrode sheet No. 21 is also electrically connected to the first input terminal of the second comparator module through one or a combination of current limiting, DC isolation, and digital control switch circuits, and the second common mode inductor is electrically connected to the second input terminal of the second comparator module.

[0040] In reality, preferably, the first common-mode inductor can be implemented with one electrode sheet, which is set as electrode sheet No. 12 here, and the second common-mode inductor can also be implemented with electrode sheets, which is set as electrode sheet No. 22 here.

[0041] When the electromagnetic coupling energy transmission system described in the present invention is working, after receiving the second modulation signal, electrode sheet No. 21 transmits it to electrode sheet No. 11 and electrode sheet No. 12 through electric field coupling. Because electrode sheet No. 12 is farther away from electrode sheet No. 21, the voltage amplitude of the second modulation signal received by electrode sheet No. 12 will be smaller than the voltage amplitude of the second modulation signal received by electrode sheet No. 11; at the same time, because electrode sheet No. 11 and electrode sheet No. 12 are at basically the same distance from the electromagnetic coupling energy transmission module, they will both be affected by basically the same crosstalk from the electromagnetic coupling energy transmission module. Therefore, electrode sheet No. 11 and electrode sheet No. 12 will output two signals with similar common mode noise but superimposed with the second modulation signal of different voltage amplitudes to the first comparator module, so that the first comparator module can accurately restore the real-time frequency of the second modulation signal as the first modulation signal to output to the first control module.

[0042] Alternatively, after receiving the third modulation signal, electrode sheet No. 11 transmits it to electrode sheet No. 21 and electrode sheet No. 22 through electric field coupling. Because electrode sheet No. 22 is farther away from electrode sheet No. 11, the voltage amplitude of the third modulation signal received by electrode sheet No. 22 will be smaller than the voltage amplitude of the third modulation signal received by electrode sheet No. 21. At the same time, since electrode sheet No. 21 and electrode sheet No. 22 are at basically the same distance from the electromagnetic coupling energy transmission module, they will both be affected by basically the same crosstalk from the electromagnetic coupling energy transmission module. Therefore, electrode sheet No. 21 and electrode sheet No. 22 will output two signals with similar common mode noise but superimposed with the third modulation signal of different voltage amplitudes to the second comparator module, so that the second comparator module can accurately restore the real-time frequency of the third modulation signal as the fourth modulation signal to output to the second control module.

[0043] When the electromagnetic coupling energy transmission system described in the present invention is working, at any time, either the first control module sends out the third modulation signal and the second control module receives the fourth modulation signal, and the first control module does not receive the first modulation signal and the second control module does not send out the second modulation signal; or the first control module receives the first modulation signal and the second control module sends out the second modulation signal, and the first control module does not send out the third modulation signal and the second control module does not receive the fourth modulation signal.

[0044] Preferably, in reality, sometimes a long first multifunctional cable is added between the first power conversion module of the energy output device and the first coil module of the electromagnetic coupling energy transmission module, so as to spatially separate the first power conversion module, which is a risk source, from the energy input device. The first multifunctional cable includes a power sub-cable and a signal sub-cable, and the power sub-cable electrically connects the first power conversion module and the first coil module of the electromagnetic coupling energy transmission module, and the first multifunctional cable is used to transmit the first alternating current with low loss. Therefore, when the power sub-cable transmits the first alternating current, it will generate strong alternating electric field and alternating magnetic field induced crosstalk to nearby conductors. In order to overcome the obvious reduction in signal-to-noise ratio caused by the crosstalk of the power sub-cable to the signal sub-cable, the signal sub-cable includes at least two bundles of wires, namely a signal wire and a common-mode induction wire, and the signal sub-cable is close to the power sub-cable.

[0045] A third comparator module is added between the input end of the first control module for receiving the first modulation signal and the signal sub-cable, wherein the third comparator module has a first input end and a second input end, and the first input end and the second input end of the third comparator module both have or do not have a DC bias circuit.

[0046] The signal wire is electrically connected to the first input end of the third comparator module and the electrode sheet No. 11, the common-mode sensing wire is electrically connected to the second input end of the third comparator module, and the output end of the third comparator module is electrically connected to the input end of the first control module for receiving the first modulation signal.

[0047] Through the above scheme, the electromagnetic coupling energy transmission system disclosed by the present invention has the electric field coupling signal transmission capability with strong anti-self-disturbance ability and environmental damage resistance, as well as the ability to simultaneously transmit power regulation signals and digital signals. Therefore, the beneficial effect is to realize electromagnetic coupling energy transmission with high reliability, wide adaptability, and precise adjustment at low cost, providing an excellent non-electrical contact power transmission solution for underwater robots, outdoor electric vehicles, rotating robotic arms, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a topological diagram of the first embodiment of the present invention.

[0049] Figure 2 It is a topological diagram of the second embodiment of the present invention.

[0050] Figure 3 It is a topological diagram of the third embodiment of the present invention.

[0051] Figure 4 It is a topological diagram of the fourth embodiment of the present invention.

[0052] Figure 5 It is a topological diagram of the fifth embodiment of the present invention.

[0053] Figure 6 It is a rectangular coordinate system diagram of the first embodiment of the F(a,b) function of the present invention.

[0054] Figure 7 It is a rectangular coordinate system diagram of the second embodiment of the F(a,b) function of the present invention.

[0055] Figure 8 It is a rectangular coordinate system diagram of the first embodiment of the F(a, b) function when the first sub-information A of the present invention is a power step value.

[0056] Fig. 9 It is a rectangular coordinate system diagram of the first embodiment of the F(a, b) function when the first sub-information A of the present invention is a preset power value coefficient.

[0057] Fig.10 It is a time domain waveform diagram in which Fp is inserted between adjacent time slices in the second modulation signal of the present invention as a synchronization timestamp.

[0058] Fig.11 It is a time domain waveform diagram of electrode sheet No. 11 and electrode sheet No. 12 when receiving the second modulation signal in the third embodiment of the present invention.

[0059] Fig.12 It is the time domain waveform of the signal wire and the common mode sensing wire in the fifth embodiment of the present invention when the electrode sheet No. 11 receives the first modulation signal. DETAILED DESCRIPTION

[0060] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention and do not limit the scope of application of the present invention. For ordinary technicians in the field, the present invention can be applied to other similar scenarios based on these drawings without creative work; as shown in this specification and claims, unless the context clearly indicates an exception, the words "one", "a", "a kind" and / or "the" do not specifically refer to the singular, but may also include the plural. In general, the terms "including" or "comprising" only indicate that the steps and elements that have been clearly identified are included, and these steps and elements do not constitute an exclusive list, and the method or device may also include other steps or elements. The term "based on" means "based at least in part". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment".

[0061] Figure 1 The first embodiment of the present invention is shown, which is also the most basic, including a first power conversion module 31, a second power conversion module 41, a first control module 32, a second control module 42, an electromagnetic coupling energy transmission module 5, and an electric field coupling communication module 1, wherein: the first power conversion module 31, the first control module 32, the first coil module 51 and the electrode sheet No. 11 constitute an energy output device 3; the second power conversion module 41, the second control module 42, the second coil module 52 and the electrode sheet No. 21 constitute an energy input device 4; the electromagnetic coupling energy transmission module 5 is composed of a first coil module 51 and a second coil module 52, and there is a strong electromagnetic mutual inductance between the first coil module 51 and the second coil module 52, so energy transfer can be performed through the electromagnetic coupling principle; the electric field coupling communication module 1 is composed of an electrode sheet No. 11 and an electrode sheet No. 21, and there is a strong electric field mutual inductance between the electrode sheet No. 11 and the electrode sheet No. 21, so signal transfer can be performed through the electric field coupling principle.

[0062] Figure 1 When the illustrated embodiment is working, the first control module 32 generates the first control signal for controlling the first power conversion module 31 to convert the first power input from the outside into the first alternating current and provide it to the first coil module of the electromagnetic coupling energy transmission module 5; the electromagnetic coupling energy transmission module 5 then generates the second alternating current and provides it to the second power conversion module 41 through the second coil module to convert it into the second power for powering the load; after the second control module 42 collects the electrical signal characteristics of the second power from the second power conversion module 41, the second program in the second control module 42 generates the second information, and then generates the second modulation signal V2 / t through the second modulation scheme and provides it to the No. 21 electrode sheet; the No. 11 electrode sheet senses and obtains the first modulation signal V1 / t, and the first control module 31 obtains the second information by subjecting the first modulation signal V1 / t to the first demodulation scheme in the first control module 31, and provides the part of the second information related to power regulation to the first program in the first control module 31 to guide the first program to generate the first control signal. Because the electric field coupling coefficient between electrode sheet No. 11 and electrode sheet No. 12 is often much smaller than 1, the waveform amplitude of the first modulation signal V1 / t will be significantly smaller than the second modulation signal V2 / t. Because the electric field coupling communication module 1 is close to the electromagnetic coupling energy transmission module 5, the waveform envelope of the first modulation signal V1 / t will be affected by the alternating electric field when the electromagnetic coupling energy transmission module 5 is working and will fluctuate.

[0063] Figure 2 The second embodiment of the present invention is shown, the first control module 32 can also generate a third modulation signal V3 / t containing the first information C, transmit it through the electric field coupling communication module 1 and generate a corresponding fourth modulation signal V4 / t, and then transmit it to the second control module 42. The second control module 42 obtains the first information C after demodulating the fourth modulation signal V4 / t, and then extracts the part related to power regulation from the first information C and provides it to the second program, guiding the second program to generate the second information.

[0064] exist Figure 1 and Figure 2 In the figure, the first modulation signal V1 / t and the fourth modulation signal V4 / t after being transmitted by the electric field coupling communication module 1 will have obvious attenuation and waveform deformation compared with the second modulation signal V2 / t and the third modulation signal V3 / t. This is because the electric field coupling communication module 1 has a certain AC impedance and is easily interfered by other changing electric fields at close range.

[0065] In order to overcome the shortcomings of the electric field coupling communication module 1, Figure 3 The embodiments of Figure 1The embodiment is optimized: electrode sheet No. 12 is added to the side of electrode sheet No. 11 away from electrode sheet No. 21, and the distance d between electrode sheet No. 11 and electrode sheet No. 12 is greater than or equal to 1 / 50 of the distance D between electrode sheet No. 11 and electrode sheet No. 21. At the same time, a first comparator module 13 is added. When working, the time domain waveforms of electrode sheet No. 11 and electrode sheet No. 12 when receiving the second modulation signal V2 / t are as follows: Fig.11 As shown, the solid line is the time domain voltage waveform on electrode sheet No. 11, and the dotted line is the time domain voltage waveform on electrode sheet No. 12. On the one hand, the time domain voltage waveforms on electrode sheets No. 11 and No. 12 have very close common-mode variation voltages. On the other hand, because electrode sheet No. 11 is closer to electrode sheet No. 21, the voltage amplitude change with square wave characteristics corresponding to V2 / t will be larger than that of electrode sheet No. 12. Therefore, the first comparator module 13 can accurately generate the first modulation signal V1 / t with the same frequency as the second modulation signal V2 / t.

[0066] Similarly, Figure 4 The embodiments of Figure 2 The embodiment is optimized: electrode sheet No. 12 is added to the side of electrode sheet No. 11 away from electrode sheet No. 21, and the distance d between electrode sheet No. 11 and electrode sheet No. 12 is greater than or equal to 1 / 50 of the distance D between electrode sheet No. 11 and electrode sheet No. 21; electrode sheet No. 22 is added to the side of electrode sheet No. 21 away from electrode sheet No. 11, and the distance d between electrode sheet No. 21 and electrode sheet No. 22 is greater than or equal to 1 / 50 of the distance D between electrode sheet No. 11 and electrode sheet No. 21; at the same time, a first comparator module 13 and a second comparator module 23 are added, and one or a combination of current limiting, DC isolation, and digital control switch circuits are added. The protection circuits 14 and 24 are used to prevent the high voltage of the second modulation signal V2 / t and the third modulation signal V3 / t from damaging the corresponding comparator module. If the protection circuit 14 or 24 adopts a digital control switch circuit, it is controlled by the first control module 32 or the second control module 42 respectively. When the second modulation signal V2 / t or the third modulation signal V3 / t is issued, the digital control switch circuit cuts off the circuit from the second modulation signal V2 / t or the third modulation signal V3 / t to the corresponding comparator module, or connects the circuit from the second modulation signal V2 / t or the third modulation signal V3 / t to the corresponding comparator module to a safe and stable level surface.

[0067] Figure 5The illustrated embodiment is that the energy output device 3 has a multifunctional cable 33 and a third comparator module 323. The multifunctional cable 33 includes a power sub-cable 331 and a signal sub-cable 332. The signal sub-cable 332 includes at least a signal conductor 3321 and a common-mode sensing conductor 3322. The power sub-cable 331 is used to transmit the first alternating current from the first power conversion module 31 to the first coil module 51 with low loss; the signal conductor 3321 is used to electrically connect the electrode sheet No. 11 to an input end of the third comparator module 323, and the common-mode sensing conductor 3322 is used to sense the changing electric field generated by the power sub-cable 331, and then generate a common-mode voltage that is synchronized and has the same amplitude as the signal conductor 3321. When working, the time domain waveforms of the signal conductor 3321 and the common-mode sensing conductor 3322 when the electrode sheet No. 11 receives the second modulation signal V2 / t and transmits it to the third comparator module 323 are as shown in FIG. Fig.12 As shown, the solid line is the time domain voltage waveform on the signal conductor 3321, and the dotted line is the time domain voltage waveform on the common-mode sensing conductor 3322. On the one hand, the time domain voltage waveforms on the signal conductor 3321 and the common-mode sensing conductor 3322 have very close common-mode variation voltages. On the other hand, because the common-mode sensing conductor 3322 will be slightly affected by the electric field of the signal conductor 3321, the voltage amplitude change with square wave characteristics corresponding to V2 / t of the signal conductor 3321 will be larger than that of the common-mode sensing conductor 3322. Therefore, the third comparator module 323 can accurately generate the first modulation signal V1 / t with the same frequency as the second modulation signal V2 / t.

[0068] Figure 6 and Figure 7 It is a rectangular coordinate system diagram of the function F=F(a,b) used in the present invention to generate the second signal. The first sub-information A falls on the a-axis, and its range is from am to aM; the second sub-information B is a string of binary codes, and b is used to represent the bit value of the second sub-information B that needs to be sent in a certain time slice, and b is bit 0 or bit 1. Figure 6 and Figure 7 In the example, when b takes different numbers of bits, the range of F values ​​does not overlap: when b=bit 0, the range of F is from Fam0 to FaM0; when b=bit 1, the range of F is from Fam1 to FaM1. In reality, since the first control module 32 and the second control module 42 generally use digital circuits as the calculation core, the value of a and the calculated value of F must be discontinuous, so Figure 6 The figure shows the rectangular coordinate system of the function F=F(a,b) when the analog circuit is used as the computing core. Figure 7 What is shown is the rectangular coordinate system diagram of the F=F(a,b) function when a digital circuit is used as the computing core, so Figure 7 It is more feasible in reality.

[0069] Figure 8The embodiment of the electromagnetic coupling energy transmission system disclosed in the present invention is used to charge a battery and transmit power to a slowly varying load to generate a second modulation signal in the function F=F(a,b), and the range and step setting of a and F. Figure 8 In the example, a ranges from -3 to 3, in steps of 1; the value range of F is: when b = bit 0, F ranges from 80 to 200, in steps of 20; when b = bit 1, F ranges from 250 to 370, in steps of 20.

[0070] Fig. 9 The embodiment of the function F=F(a,b) for generating a second modulation signal when the electromagnetic coupling energy transmission system disclosed by the present invention is used to transmit power to a transient power load, and the range and step setting of a and F are shown. Fig. 9 In the example, a ranges from 0 to 10, in steps of 1; the value range of F is: when b = bit 0, F ranges from 90 to 200, in steps of 10; when b = bit 1, F ranges from 250 to 360, in steps of 10.

[0071] Fig.10 The display is based on Figure 8 In the embodiment, a time domain waveform using Fp as a synchronization timestamp is inserted between adjacent time slices in the second modulation signal. The time length of each time slice is substantially the same, and the Ft value of the second modulation signal in each time slice is generated using Ft=F(at,bt) based on the first sub-information at and the second sub-information bt of this time slice. Between adjacent time slices, a period of Fp with substantially the same length is inserted, and the frequency value of Fp is significantly higher than 360, so that the first control module 32 can accurately identify it.

Claims

1. An electromagnetic coupling energy transmission system, characterized in that: It includes an energy output device and an energy input device, and has a first electric energy conversion module, a second electric energy conversion module, a first control module, a second control module, an electromagnetic coupling energy transmission module, and an electric field coupling communication module. The first control module has a first program, and the first program generates a first control signal according to preset parameters, characteristics of a first electrical signal output from the first power conversion module, and a part of second information generated by the second control module that is related to power regulation. And the first control module also has a first demodulation scheme, and the first demodulation scheme has a signal detection circuit, a channel demodulation module and a source demodulation module; The second control module has a second program, and the second program generates the second information according to preset parameters and characteristics of the second electrical signal output from the second electrical energy conversion module; The electromagnetic coupling energy transmission module comprises a first coil module and a second coil module, and performs energy transmission through the principle of "alternating current-alternating magnetic field coupling-alternating current"; The electric field coupling communication module comprises a first group of electrode sheets and a second group of electrode sheets, the first group of electrode sheets and the second group of electrode sheets are close to each other and substantially face each other, and communication signals are transmitted through the principle of "changing voltage-changing electric field coupling-changing voltage", the first group of electrode sheets at least comprises electrode sheet No. 11, the second group of electrode sheets at least comprises electrode sheet No. 21, and the electrode sheet No. 11 and the electrode sheet No. 21 are conductors; The first electric energy conversion module, the first control module, the first coil module and the first group of electrode sheets constitute an energy output device; The second electric energy conversion module, the second control module, the second coil module and the second group of electrode sheets constitute an energy output device; The second information includes first sub-information A and second sub-information B, wherein the first sub-information A is power adjustment guidance information, and the second sub-information B includes one or a combination of data such as the real-time state of the load, the characteristics and number of the energy receiving device, etc.; The second control module has a second modulation scheme, the second modulation scheme has a source modulation module, a channel modulation module and a signal power amplifier circuit, the second control module obtains a second modulation signal by subjecting the second information to the second modulation scheme, and the second modulation signal is characterized by a frequency modulation signal; The second modulation scheme is characterized by having a function formula Ft=F(at,bt), in which, in any time slot t, Ft is the waveform of the second modulation signal at this time slot t, Ft has voltage and frequency characteristics, at is the value of the first sub-information A at this time slot t, bt is the number of bits of the second sub-information B at this time slot t, The characteristic of the F(a,b) function is that when the horizontal coordinate is a and the vertical coordinate is F(a,b), the range of a is a rational number from am to aM. When b=bit n, the corresponding F(a,b) is a rational number from Famn to FaMn, where n is an integer greater than or equal to 0. Moreover, under any value of n, the change from Famn to FaMn is monotonic, and under all values ​​of n, the direction of change from Famn to FaMn is consistent. And, taking any two bit values ​​i and j, the projection Shai of the curve or straight line from Fami to FaMi on the ordinate axis and the projection Shaj of the curve or straight line from Famj to FaMj on the ordinate axis do not overlap; When the electromagnetic coupling energy transmission system described in the present invention is working, the first control module generates the first control signal to control the first power conversion module to convert the first electric energy input from the outside into the first alternating current and provide it to the first coil module of the electromagnetic coupling energy transmission module. The second coil module then generates a second alternating current which is provided to the second power conversion module for conversion into second power for powering the load. The second control module collects the electrical signal characteristics of the second electrical energy and generates the second information according to the second program, and then generates the second modulation signal through the second modulation scheme and provides it to the electrode sheet No.

21. The electrode sheet No. 11 then generates a first modulation signal and transmits it to the first control module. The first control module obtains the second information by subjecting the first modulated signal to a first demodulation scheme, and provides the power regulation-related portion of the second information to the first program to instruct the first program to generate the first control signal.

2. The electromagnetic coupling energy transmission system according to claim 1, characterized in that: The first sub-information A is a parameter related to the power step value that the first power conversion module needs to adjust calculated by the second program. The range of the first sub-information A is from -a to a, where a is a rational number.

3. The electromagnetic coupling energy transmission system according to claim 1, characterized in that: The first sub-information A and the second program calculate the parameters related to the preset power value to which the first electric energy conversion module needs to jump, and the range of the first sub-information A is from b to c, where b and c are both rational numbers.

4. The electromagnetic coupling energy transmission system according to claim 1, characterized in that: The first control module also sends first information C to the second control module; The first information C includes one or a combination of data such as the electrical signal characteristics of the first electrical energy, the electromagnetic characteristics of the first coil module, and the response to the first information; The first control module has a first modulation scheme, the first modulation scheme has a source modulation module, a channel modulation module and a signal power amplifier circuit, the first control module obtains a third modulation signal by subjecting the first information C to the first modulation scheme, and the third modulation signal is characterized by a frequency modulation signal; The second control module also has a second demodulation scheme, and the second demodulation scheme has a signal detection circuit, a channel demodulation module and a source demodulation module; The second program also generates the second information according to the part of the first information C related to power regulation; The first modulation scheme is characterized by having a function formula Gt=G(ct), in any time slice t, where Gt is the waveform of the third modulation signal at this time slice t, Gt has voltage and frequency characteristics, and ct is the number of bits of the first information C at this time slice t; The characteristic of the G(c) function is that when the value of ca is bit 0 to bit k, the corresponding G(c) changes monotonically from G0 to Gk, where k is an integer greater than 0, in a rectangular coordinate system with the horizontal axis c and the vertical axis G(c). When the electromagnetic coupling energy transmission system described in the present invention is working, the first control module generates the third modulation signal and transmits it to the No. 11 electrode sheet, and the No. 21 electrode sheet then generates the fourth modulation signal and transmits it to the second control module. The second control module obtains the first information C by subjecting the fourth modulated signal to the second demodulation scheme, and the second control module extracts the part related to power regulation in the first information C and provides it to the second program, thereby guiding the second program to generate the second information.

5. An electromagnetic coupling energy transmission system according to claim 1 or 4, characterized in that: In the first modulation scheme or the second modulation scheme, a waveform Fp with special frequency characteristics is inserted between adjacent time slices tn and tn+1 as a synchronization timestamp to form the following first modulation signals Ft1, Fp, Ft2, Fp, Ft3, Fp, Ft4, Fp, Ft5..., or the third modulation signals Gt1, Fp, Gt2, Fp, Gt3, Fp, Gt4, Fp, Gt5... arranged in time sequence.

6. The electromagnetic coupling energy transmission system according to claim 1, characterized in that: There is also a first comparator module, the first comparator module has a first input terminal and a second input terminal, the first input terminal and the second input terminal of the first comparator module both have or do not have a DC bias circuit; The first group of electrode sheets further includes a first common mode inductor, which is arranged on a side of the electrode sheet No. 11 away from the electrode sheet No. 21, and a distance d between the electrode sheet No. 11 and the first common mode inductor is greater than or equal to 1 / 50 of a distance D between the electrode sheet No. 11 and the electrode sheet No. 21; The first common mode inductor is an electrically connected conductor; The first input end and the second input end of the first comparator module are electrically connected to the No. 11 electrode sheet and the first common mode inductor respectively, and the output end of the first comparator module is used to output the first modulation signal.

7. The electromagnetic coupling energy transmission system according to claim 4, characterized in that: Also having a first comparator module and a second comparator module; The first comparator module has a first input terminal and a second input terminal, and the first input terminal and the second input terminal of the first comparator module both have or do not have a DC bias circuit; The second comparator module has a first input terminal and a second input terminal, and the first input terminal and the second input terminal of the second comparator module both have or do not have a DC bias circuit; The first control module has a first modulation signal input terminal and a third modulation signal output terminal, and the second control module has a fourth modulation signal input terminal and a second modulation signal output terminal; The first set of electrode sheets also includes a first common mode inductor, which is an electrically connected conductor; The second set of electrode sheets also includes a second common mode inductor, the second common mode inductor being an electrically connected conductor; The first common mode inductor is arranged on a side of the electrode sheet No. 11 away from the electrode sheet No. 21, and a distance d between the electrode sheet No. 11 and the first common mode inductor is greater than or equal to 1 / 50 of a distance D between the electrode sheet No. 11 and the electrode sheet No. 21; The second common mode inductor is arranged on a side of the electrode sheet No. 21 away from the electrode sheet No. 11, and the distance d between the electrode sheet No. 21 and the second common mode inductor is greater than or equal to 1 / 50 of the distance D between the electrode sheet No. 11 and the electrode sheet No. 21; The first modulation signal input terminal is electrically connected to the output terminal of the first comparator module, the third modulation signal output terminal is electrically connected to the No. 11 electrode sheet, the No. 11 electrode sheet is also electrically connected to the first input terminal of the first comparator module through one or a combination of current limiting, DC isolation, and digital control switch circuits, and the first common mode inductor is electrically connected to the second input terminal of the first comparator module; The fourth modulation signal input terminal is electrically connected to the output terminal of the second comparator module, the second modulation signal output terminal is electrically connected to the electrode sheet No. 21, and the electrode sheet No. 21 is also electrically connected to the first input terminal of the second comparator module through one or a combination of current limiting, DC isolation, and digital control switching circuits, and the second common mode inductor is electrically connected to the second input terminal of the second comparator module.

8. The electromagnetic coupling energy transmission system according to claim 1, characterized in that: Also having a first multi-function cable and a third comparator module, The third comparator module has a first input terminal and a second input terminal, and the first input terminal and the second input terminal of the third comparator module both have or do not have a DC bias circuit; The first multifunctional cable comprises a power sub-cable and a signal sub-cable; The power sub-cable of the first multifunctional cable electrically connects the first power conversion module and the first coil module of the electromagnetic coupling energy transmission module, and the first multifunctional cable is used for low-loss transmission of the first alternating current; The signal sub-cable comprises at least two bundles of conductors, namely a signal conductor and a common-mode sensing conductor, and the signal sub-cable is close to the power sub-cable; The signal wire is electrically connected to the first input end of the third comparator module and the electrode sheet No. 11, the common-mode sensing wire is electrically connected to the second input end of the third comparator module, and the output end of the third comparator module is electrically connected to the input end of the first control module for receiving the first modulation signal.

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