Full-duplex radio energy signal synchronous transmission system based on cross dipole coils

Abstract

The application provides a full-duplex radio energy signal synchronous transmission system based on a cross dipole coil, a first winding in a primary cross dipole coil is connected with a first energy transmitting circuit and a primary first signal transmitting circuit, a second winding is connected with a second energy transmitting circuit and a primary second signal transmitting circuit; a first winding in a secondary cross dipole coil is connected with a first energy receiving circuit and a secondary first signal transmitting circuit, a second winding is connected with a second energy receiving circuit and a secondary second signal transmitting circuit, a primary signal receiving circuit and a primary main channel wave blocking network are connected between the primary first signal transmitting circuit and the primary second signal transmitting circuit, and a secondary signal receiving circuit and a secondary main channel wave blocking network are connected between the secondary first signal transmitting circuit and the secondary second signal transmitting circuit. The effect is that the output current is constant, the anti-offset property is improved, the crosstalk between channels can be effectively blocked, and high-speed full-duplex transmission of signals is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to wireless power transmission technology, in particular to a full-duplex wireless power signal simultaneous transmission system based on cross-dipole coils. BACKGROUND

[0002] Wireless power transfer (WPT) technology refers to the comprehensive application of power electronics technology and modern control theory, which realizes the transmission of electric energy from power source / battery to load in a non-electrical contact manner through magnetic field, electric field and microwave, etc. It has the advantages of safety, reliability, flexibility, etc. and has been widely used in implantable biomedical, consumer electronics, electric vehicles, underwater unmanned equipment and other fields. In the application of WPT technology, system closed-loop control, battery charge state monitoring, load identification and foreign object detection all inevitably need data interaction between the transmitting end and the receiving end. Therefore, the simultaneous wireless power and data transfer (SWPDT) technology has become a research hotspot at present. The widely used wireless communication technologies such as Zigbee, Bluetooth module, Wi-Fi module and RFID not only need to increase the cost, but also need to expand the size of the system. SUMMARY

[0003] In order to realize the design requirement of miniaturization of the coupling mechanism in the case of energy signal simultaneous transmission, the present application proposes a full-duplex wireless power signal simultaneous transmission system based on cross-dipole coils, which improves the anti-offset capability of the system, and the technical scheme is as follows:

[0004] A full-duplex wireless power signal simultaneous transmission system based on cross-dipole coils, the key lies in: comprising a primary cross-dipole coil and a secondary cross-dipole coil, wherein the first winding in the primary cross-dipole coil is connected with a first energy transmitting circuit and a primary first signal transmitting circuit, the second winding in the primary cross-dipole coil is connected with a second energy transmitting circuit and a primary second signal transmitting circuit, the first winding in the secondary cross-dipole coil is connected with a first energy receiving circuit and a secondary first signal transmitting circuit, and the second winding in the secondary cross-dipole coil is connected with a second energy receiving circuit and a secondary second signal transmitting circuit. A primary signal receiving circuit and a primary main channel wave suppression network are connected between the primary first signal transmitting circuit and the primary second signal transmitting circuit, and a secondary signal receiving circuit and a secondary main channel wave suppression network are connected between the secondary first signal transmitting circuit and the secondary second signal transmitting circuit.

[0005] Optionally, the primary side cross dipole coil and the secondary side cross dipole coil each comprise a cross-shaped magnetic core structure, a set of series-connected coils are wound on the magnetic cores of two end heads in the horizontal direction of the cross-shaped magnetic core structure as a first winding, and a set of series-connected coils are wound on the magnetic cores of two end heads in the vertical direction of the cross-shaped magnetic core structure as a second winding, the first winding and the second winding are mutually orthogonal and decoupled.

[0006] Optionally, the first energy transmitting circuit comprises a first direct current power supply, a first inverter, and a first primary side LCCL resonant network, the second energy transmitting circuit comprises a second direct current power supply, a second inverter, and a second primary side LCCL resonant network, the first inverter and the second inverter output high-frequency inverter signals that are 90° out of phase but have the same frequency and size.

[0007] Optionally, the first direct current power supply and the second direct current power supply share the same direct current power supply.

[0008] Optionally, the first energy receiving circuit comprises a first secondary side LCCL resonant network and a first rectification filter circuit, the second energy receiving circuit comprises a second secondary side LCCL resonant network and a second rectification filter circuit, and the output ends of the first rectification filter circuit and the second rectification filter circuit are connected in parallel to supply power to a load.

[0009] Optionally, the primary side first signal transmitting circuit comprises a primary side first signal source, a primary side first signal transmitting choke network, a primary side first filter capacitor, and a primary side first current-limiting resistor, one end of the primary side first signal source is connected to one end of a first winding in the primary side cross dipole coil through the primary side first signal transmitting choke network and the primary side first filter capacitor in sequence, and the other end of the first winding in the primary side cross dipole coil is connected to the other end of the primary side first signal source through the primary side first current-limiting resistor.

[0010] The primary side second signal transmitting circuit comprises a primary side second signal source, a primary side second signal transmitting choke network, a primary side second filter capacitor, and a primary side second current-limiting resistor, one end of the primary side second signal source is connected to one end of a second winding in the primary side cross dipole coil through the primary side second signal transmitting choke network and the primary side second filter capacitor in sequence, and the other end of the second winding in the primary side cross dipole coil is connected to the other end of the primary side second signal source through the primary side second current-limiting resistor.

[0011] A1 point is set as the connection point of the primary side first signal transmitting wave choke network and the primary side first filter capacitor, B1 point is set as the connection point of the primary side first current limiting resistor and the primary side first signal source, C1 point is set as the connection point of the primary side second signal transmitting wave choke network and the primary side second filter capacitor, and D1 point is set as the connection point of the primary side second current limiting resistor and the primary side second signal source, the primary side signal receiving circuit is connected between A1 point and D1 point, and the primary side main channel wave choke network is connected between B1 point and C1 point.

[0012] Optionally, the primary side signal receiving circuit comprises a primary side signal sampling resistor, a compensation inductor and a primary side signal receiving wave choke network.

[0013] The secondary side second signal transmitting circuit comprises a secondary side second signal source, a secondary side second signal transmitting wave choke network, a secondary side second filter capacitor and a secondary side second current limiting resistor, one end of the secondary side second signal source is connected to one end of the second winding in the secondary side cross dipole coil through the secondary side second current limiting resistor, and the other end of the second winding in the secondary side cross dipole coil is connected to the other end of the secondary side second signal source through the secondary side second filter capacitor and the secondary side second signal transmitting wave choke network in sequence.

[0014] A2 point is set as the connection point of the secondary side first signal source and the secondary side first filter capacitor, B2 point is set as the connection point of the secondary side first current limiting resistor and the secondary side first signal transmitting wave choke network, C2 point is set as the connection point of the secondary side second current limiting resistor and the secondary side second signal source, and D2 point is set as the connection point of the secondary side second signal transmitting wave choke network and the secondary side second filter capacitor, the secondary side signal receiving circuit is connected between A2 point and D2 point, and the secondary side main channel wave choke network is connected between B2 point and C2 point.

[0015] Optionally, the primary side signal receiving circuit comprises a primary side signal sampling resistor, a compensation inductor and a primary side signal receiving wave choke network.

[0016] Optionally, the primary side signal receiving wave blocking network, the primary side main channel wave blocking network, the secondary side main channel wave blocking network and the secondary side signal receiving wave blocking network are all composed of two LC series resonators in parallel; the primary side first signal transmitting wave blocking network, the primary side second signal transmitting wave blocking network, the secondary side first signal transmitting wave blocking network and the secondary side second signal transmitting wave blocking network all adopt a single LC parallel resonator.

[0017] Optionally, the signals emitted by the primary side first signal source and the primary side second signal source adopt a first preset frequency and are 90 degrees out of phase; the signals emitted by the secondary side first signal source and the secondary side second signal source adopt a second preset frequency and are 90 degrees out of phase.

[0018] The effects of the present application are as follows:

[0019] The full-duplex wireless power signal synchronous transmission system based on the cross-dipole coil proposed by the present application can realize constant output current of the power transmission channel, improve the anti-deviation performance of the system, the wave blocking network can effectively block the crosstalk between the signal and the power transmission channel, the signal transmission channel adopts a double-resonance circuit to realize full-duplex transmission of the signal at a higher transmission rate, and the introduction of the composite resonance network improves the signal-to-noise ratio of the system. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below.

[0021] Figure 1 The circuit schematic diagram of the specific embodiments of the present application;

[0022] Figure 2 The equivalent circuit diagram of the energy transmission channel;

[0023] Figure 3 The equivalent circuit diagram of the signal transmission channel;

[0024] Figure 4 The circuit schematic diagram of the signal modulation circuit in the specific embodiments;

[0025] Figure 5 The circuit schematic diagram of the signal demodulation circuit in the specific embodiments;

[0026] Figure 6 The received signal voltage waveform diagram when the angle deviation is 15 degrees during signal forward transmission;

[0027] Figure 7 The received signal voltage waveform diagram when the angle deviation is 15 degrees during signal reverse transmission;

[0028] Figure 8 Figure 6 is a received signal voltage waveform diagram when the angle offset is 20° for signal forward transmission;

[0029] Figure 9 Figure 7 is a received signal voltage waveform diagram when the angle offset is 20° for signal reverse transmission. DETAILED DESCRIPTION

[0030] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, but cannot limit the protection scope of the present application.

[0031] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meaning understood by the skilled person in the field to which the present application belongs.

[0032] As shown in Figure 1 The present embodiment provides a full-duplex wireless power signal synchronous transmission system based on a cross-dipole coil, which comprises a primary cross-dipole coil and a secondary cross-dipole coil. The first winding (tx) in the primary cross-dipole coil is connected with a first energy transmitting circuit and a primary first signal transmitting circuit. The second winding (ty) in the primary cross-dipole coil is connected with a second energy transmitting circuit and a primary second signal transmitting circuit. The first winding (rx) in the secondary cross-dipole coil is connected with a first energy receiving circuit and a secondary first signal transmitting circuit. The second winding (ry) in the secondary cross-dipole coil is connected with a second energy receiving circuit and a secondary second signal transmitting circuit. A primary signal receiving circuit and a primary main channel wave blocking network are connected between the primary first signal transmitting circuit and the primary second signal transmitting circuit. A secondary signal receiving circuit and a secondary main channel wave blocking network are connected between the secondary first signal transmitting circuit and the secondary second signal transmitting circuit.

[0033] In combination Figure 1 As can be seen, in the present embodiment, the primary cross-dipole coil and the secondary cross-dipole coil both comprise a cross-shaped magnetic core structure. A set of series-connected coils is wound on the magnetic cores of the two end heads in the horizontal direction of the cross-shaped magnetic core structure as a first winding. A set of series-connected coils is wound on the magnetic cores of the two end heads in the vertical direction of the cross-shaped magnetic core structure as a second winding. The first winding and the second winding are orthogonal to each other and are decoupled.

[0034] By Figure 2As can be seen, the power transmission channel consists of a DC power supply, two full-bridge inverters, four LCCL compensation networks, a cross-dipole coupled coil, rectifier bridges, and a load. The two inverters share a single DC power supply, and the two rectifier bridges share a single filter capacitor to form a rectifier-filter circuit. The outputs of the two rectifier bridges are connected in parallel to the filter capacitor to supply power to the load. The use of cross-dipole coupled coils creates a magnetic field in space that is a concentric circle with the geometric center of the transmitting coil as its center and the field strength values ​​as its radii. The magnetic field around the transmitting coil exhibits a uniform gradient decrease, achieving the design goal of omnidirectional adaptability of the system.

[0035] Combination Figure 2 It can be seen that the power transmission channel operates at the power transmission frequency ω. p Down, U λ (λ = 1, 2) represents the input voltage at the operating angular frequency ω. p The equivalent AC voltage source under the condition that, and satisfies U1 = jU2, the first primary-side LCCL resonant network and the first secondary-side LCCL resonant network in the first energy transmission channel constitute a bilateral LCCL compensation topology, and the second primary-side LCCL resonant network and the second secondary-side LCCL resonant network in the second energy transmission channel constitute a bilateral LCCL compensation topology. Figure 2 As can be seen from the diagram, the first primary-side LCCL resonant network includes inductor Lf1, capacitor Cf1, capacitor C1, and inductor Ld1; the second primary-side LCCL resonant network includes inductor Lf2, capacitor Cf2, capacitor C2, and inductor Ld2; the first secondary-side LCCL resonant network includes inductor Lf3, capacitor Cf3, capacitor C3, and inductor Ld3; and the second secondary-side LCCL resonant network includes inductor Lf4, capacitor Cf4, capacitor C4, and inductor Ld4. L1 represents the first winding in the primary-side crossed dipole coil, L2 represents the second winding in the primary-side crossed dipole coil, L3 represents the first winding in the secondary-side crossed dipole coil, L4 represents the second winding in the secondary-side crossed dipole coil, and M13, M14, M23, and M24 represent the mutual inductance between the corresponding coil windings. fλ (λ=1,2,3,4) represent the current flowing through the resonant inductor in each LCCL compensation network. The first inverter and the second inverter output high-frequency inverter signals that are 90° out of phase but have the same frequency and magnitude.

[0036] When the system operates at angular frequency ω p At this point, the input impedances Zdt1, Zdt2, Zdr1, and Zdr2 of each signal transmission channel are all high impedances, therefore they can be ignored when analyzing the power transmission channel. Applying KVL and KCL laws to the primary side of the power transmission channel, we can obtain:

[0037]

[0038] By modulating the inverter control signal so that U1 and U2 are the same size case phase difference 90°. Substituting the resonance relationship to the above formula, the excitation current

[0039]

[0040] It can be seen that the primary side has constant current output characteristics, excitation current only with input voltage U λ and inductance L fλ Related.

[0041] The secondary side equivalent circuit is similar to the primary side, signal branch Zdr1 and Zdr2 as high impedance, for the same reason, the secondary side of the power transmission channel simultaneous equations:

[0042]

[0043] Two power channels using parallel double connection rectifier after power supply to the load, the equivalent load of each channel is:

[0044]

[0045] The above formula i Lλ (λ = 3,4) for each channel output current at the load, when the circuit is in steady state, and only considering the fundamental component, the rectifier bridge input current and output current relationship can be expressed as:

[0046] The rectifier bridge input current and output current relationship can be expressed as:

[0047]

[0048] Combining the circuit in w p Resonance, we get:

[0049]

[0050] Where L f1 = L f2 = L f3 = L f4 The formula is replaced by L f1 Therefore, the system DC output current i L Expressed as:

[0051]

[0052] Further obtained:

[0053]

[0054] It can be seen that the system power transmission channel can maintain constant current output characteristics, and only with the DC input voltage Uin Mutual inductance M between coupling coils 13 M 14 M 23 M 24 and resonant inductance.

[0055] For the signal transmission channel, in combination Figure 3 It can be seen that the first primary signal transmitting circuit includes a first primary signal source U d1 , a first primary signal transmitting wave trap, a first primary filter capacitor C d1 , and a first primary current-limiting resistor R d1 One end of the first primary signal source U d1 is connected to one end of the first winding of the primary cross-dipole coil through the first primary signal transmitting wave trap and the first primary filter capacitor C d1 in turn, and the other end of the first winding of the primary cross-dipole coil is connected to the other end of the first primary signal source U d1 through the first primary current-limiting resistor R d1 .

[0056] The second primary signal transmitting circuit includes a second primary signal source U d2 , a second primary signal transmitting wave trap, a second primary filter capacitor C d2 , and a second primary current-limiting resistor R d2 One end of the second primary signal source U d2 is connected to one end of the second winding of the primary cross-dipole coil through the second primary signal transmitting wave trap and the second primary filter capacitor C d2 , and the other end of the second winding of the primary cross-dipole coil is connected to the other end of the second primary signal source U d2 through the second primary current-limiting resistor R d2 .

[0057] Let the connection point of the first primary signal transmitting wave trap and the first primary filter capacitor be point A1, the connection point of the first primary current-limiting resistor and the first primary signal source be point B1, the connection point of the second primary signal transmitting wave trap and the second primary filter capacitor be point C1, and the connection point of the second primary current-limiting resistor and the second primary signal source be point D1. The primary signal receiving circuit is connected between points A1 and D1, and the primary main channel wave trap is connected between points B1 and C1.

[0058] Correspondingly, the first secondary signal transmitting circuit includes a first secondary signal source U d3 , a first secondary signal transmitting wave trap, a first secondary filter capacitor C d3 , and a first secondary current-limiting resistor Rd3 The secondary side first signal source U d3 One end passes through the secondary side first filter capacitor C d3 The other end of the first winding in the secondary-side crossed dipole coil is connected to one end of the first winding, and the other end of the first winding in the secondary-side crossed dipole coil passes through the secondary-side first current-limiting resistor R. d3 The secondary side first signal transmitting wave-blocking network is connected to the secondary side first signal source U. d3 The other end;

[0059] The secondary-side second signal transmitting circuit includes a secondary-side second signal source U. d4 Secondary side second signal transmitting blocking network, secondary side second filter capacitor C d4 and the second current-limiting resistor R on the secondary side d4 The secondary side second signal source U d4 One end passes through the secondary side second current-limiting resistor R d4 Following this is one end of the second winding in the secondary-side crossed dipole coil, and the other end of the second winding in the secondary-side crossed dipole coil passes sequentially through the secondary-side second filter capacitor C. d4 The secondary side second signal transmitting wave-blocking network is connected to the secondary side second signal source U. d4 The other end;

[0060] Let point A2 be the connection point between the first secondary signal source and the first secondary filter capacitor, point B2 be the connection point between the first secondary current limiting resistor and the first secondary signal transmitting blocking network, point C2 be the connection point between the second secondary current limiting resistor and the second secondary signal source, and point D2 be the connection point between the second secondary signal transmitting blocking network and the second secondary filter capacitor. Then, the secondary signal receiving circuit is connected between points A2 and D2, and the secondary main channel blocking network is connected between points B2 and C2.

[0061] pass Figure 3 As can be seen, in this embodiment, the primary-side signal receiving circuit includes a primary-side signal sampling resistor Rt1, a compensation inductor Lt1, and a primary-side signal receiving blocking network, and the secondary-side signal receiving circuit includes a secondary-side signal sampling resistor Rt2, a compensation capacitor Ct2, and a secondary-side signal receiving blocking network.

[0062] from Figure 1 and Figure 3As can be seen, the primary side signal receiving wave blocking network and the primary side main channel wave blocking network are both composed of two LC series resonators in parallel, including inductance Lza2, inductance Lzb2, capacitance Cza2 and capacitance Czb2; the secondary side main channel wave blocking network and the secondary side signal receiving wave blocking network are also both composed of two LC series resonators in parallel, including inductance Lza4, inductance Lzb4, capacitance Cza4 and capacitance Czb4; the primary side first signal transmitting wave blocking network and the primary side second signal transmitting wave blocking network are both composed of a single LC parallel resonator, including inductance Lz1 and capacitance Cz1; the secondary side first signal transmitting wave blocking network and the secondary side second signal transmitting wave blocking network are also both composed of a single LC parallel resonator, including inductance Lz3 and capacitance Cz3.

[0063] In the implementation process, the forward signal carrier frequency is defined as f d1 , and the corresponding angular frequency is w d1 , the reverse signal carrier frequency is f d2 , and the corresponding angular frequency is w d2 , it should be noted that L dλ , C λ and C fλ (λ=1,2,3,4) form a low-pass filter, and the access impedance Zp1, Zp2, Zs1 and Zs2 of each energy channel in the signal transmission channel behaves as high impedance at the signal transmission frequency, which can effectively isolate the signal from the power transmission channel.

[0064] To realize the full-angle adaptability of signal transmission, the signal modulation circuit shown in Figure 4 is adopted, U c represents a modulation square wave, U od represents an input signal, and taking forward signal transmission as an example, modulation obtains two carrier signals U d1 and U d2 with a phase difference of 90°, which are transmitted to the secondary side signal sampling resistor R t2 through a double-resonance signal circuit, and then the original signal U od is recovered through the demodulation circuit shown in Figure 5 . Figure 5 In the above embodiment, FOL is a voltage follower, BPF is a band-pass filter, Amp is an operational amplifier, ED is an envelope detector, and Comp is a voltage comparator.

[0065] In the above embodiment, the composite resonant network is introduced, which effectively improves the signal-to-noise ratio of the system signal, C za2 , L za2 , C zb2 and L zb2 (C za4 , L za4 , C zb4 and L zb4) to constitute a composite resonator. It is composed of two parallel LC series resonators, which will produce a band-stop effect when the series LC resonator resonates, and the two parallel LC resonators resonate at f d1 or f d2 , that is, a transmission pole is generated. It can be seen that the signal transmission circuit proposed in the present application increases two transmission zeros compared with the conventional LC resonator in the prior art, improves the selectivity of the circuit to the signal on the receiving side, and in addition, for a two-transmitting and two-receiving system, a two-channel signal series cascade circuit is adopted, which greatly improves the voltage boost of the received signal.

[0066] Specifically, let w d1 >w d2 , in the forward transmission of the signal, according to the LC series and parallel resonance characteristics, C za2 , L za2 , C zb2 and L zb2 composite resonant network and C z3 , L z3 resonant network are all high impedance, and the branch where they are located is equivalent to an open circuit, and the carrier signals Ud1 and Ud2 are transmitted through the resonant network of L z1 and C z1 to coils L3 and L4 through coupling coils L1 and L2, and then the signal voltage picked up at the receiving end is connected in series through the C za4 , L za4 , C zb4 and L zb4 composite resonant network, and finally the data is extracted on the secondary side signal sampling resistor Rt2, and the reverse signal transmission channel works similarly.

[0067] In the design process, in combination with the circuit shown in Figure 3 , C z1 and L z1 resonant network satisfies: C za4 , L za4 , C zb4 and L zb4 composite resonant network satisfies:

[0068]

[0069] w d21 , w d22 are the series resonance frequencies of the two branches of the corresponding composite resonant network;

[0070] In the forward transmission of the signal, w = w d1 , the C z1 and L z1 resonant network is equivalent to: Lλ and C dλ (λ = 1,2,3,4) are equivalent to L fd1 , then: C za4 , L za4 , C zb4 and L zb4 form a composite resonant network equivalent to:

[0071]

[0072] In the circuit, C zfd1 and L fd1 satisfy

[0073] C t2 is used to compensate L zfd1 , L fd1 , which satisfies:

[0074] Similarly, when the signal is transmitted in the opposite direction, C za4 , L za4 , C zb4 and L zb4 form a composite resonant network, and C z1 , L z1 form a resonant network that presents high impedance, and the corresponding branches are equivalent to open circuit. C z3 , L z3 satisfy C za2 , L za2 , C zb2 and L zb2 form a composite resonant network that satisfies:

[0075]

[0076] where w d11 , w d12 are the series resonant frequencies of the two branches of the corresponding composite resonant network.

[0077] When the signal is transmitted in the opposite direction, w = w d2 , C z3 , L z3 form a resonant network equivalent to L zfd2 , and The self-inductance L λ of the coupling coil and C dλ are equivalent to C fd2 , and

[0078] C za2 , L za2 , Czb2 and L zb2 The composite resonant network is equivalent to C zfd2 , and has:

[0079]

[0080] C fd2 and L zfd2 satisfy:

[0081] L t1 for compensating C zfd2 , L fd2 and satisfy

[0082] In specific implementation, the signal circuit parameters L zeqa2 = L z3 , L zeqa4 = L z1 , C zeqb2 = C z3 , C zeqb4 = C z1 can be obtained:

[0083]

[0084]

[0085]

[0086] To further verify the effect of the above design, a simulation model is built in Simulink, and the detailed parameter settings of the system are shown in Table 1. According to the parameters of the power transmission channel in the table, the following results are obtained by simulation. The output power and efficiency of the system energy channel meet the values derived in theory, and the maximum transmission efficiency of 80% is achieved, with an output power of 441W.

[0087] Table 1: System parameters (Note: λ = 1, 2, 3, 4)

[0088]

[0089] The simulation verification of the system power transmission capacity under the conditions of receiving end angle offset of 5°, 10°, 15°, and 20° is also carried out, and the specific performance index parameters obtained are shown in Table 2.

[0090] Table 2: Performance of power transmission channel under angle offset

[0091]

[0092] It can be seen that the output current i L and the output power Po All are reduced, but the change trend is not big, in the case of 20° offset, the output current i L is 3.6A, the output power P o is 324W, compared with 0°, the fluctuation amplitude is smaller.

[0093] Similarly, under the premise of efficient transmission of electric energy, the signal transmission channel realizes stable high-speed transmission of signals at an angle offset of 10°, 15°, and 20° through simulation.

[0094] In addition, from Figures 6-9 It can be seen that the system receiving mechanism can stably transmit system signals under the offset condition, verifying the full-angle adaptability of the proposed system signals, and the system signal transmission channel can also maintain 100kbps signal transmission rate when offset by 20°.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for part or all of the technical features; and such modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and such changes should be covered in the scope of the claims and the specification of the present application.

Claims

1. A cross-dipole coil based full-duplex radio energy signal simultaneous transmission system, characterized in that: The cross-dipole coil includes a primary cross-dipole coil and a secondary cross-dipole coil, wherein a first winding in the primary cross-dipole coil is connected with a first energy transmitting circuit and a primary first signal transmitting circuit, a second winding in the primary cross-dipole coil is connected with a second energy transmitting circuit and a primary second signal transmitting circuit, a first winding in the secondary cross-dipole coil is connected with a first energy receiving circuit and a secondary first signal transmitting circuit, and a second winding in the secondary cross-dipole coil is connected with a second energy receiving circuit and a secondary second signal transmitting circuit; a primary signal receiving circuit and a primary main channel wave blocking network are connected between the primary first signal transmitting circuit and the primary second signal transmitting circuit; and a secondary signal receiving circuit and a secondary main channel wave blocking network are connected between the secondary first signal transmitting circuit and the secondary second signal transmitting circuit. The primary cross-dipole coil and the secondary cross-dipole coil each include a cross-shaped magnetic core structure, a group of series-connected coils are wound on the magnetic cores of two end heads in the horizontal direction of the cross-shaped magnetic core structure as a first winding, and a group of series-connected coils are wound on the magnetic cores of two end heads in the vertical direction of the cross-shaped magnetic core structure as a second winding; the first winding and the second winding are orthogonal to each other and are decoupled.

2. The cross-dipole coil based full-duplex radio energy signal simultaneous transmission system of claim 1, wherein: The first energy transmitting circuit includes a first direct-current power supply, a first inverter and a first primary LCCL resonant network; the second energy transmitting circuit includes a second direct-current power supply, a second inverter and a second primary LCCL resonant network; the first inverter and the second inverter output high-frequency inverter signals that are 90° out of phase but have the same frequency and size.

3. The cross-dipole coil based full-duplex radio energy signal simultaneous transmission system of claim 2, wherein: The first direct-current power supply and the second direct-current power supply share the same direct-current power supply.

4. The cross-dipole coil based full-duplex wireless power signal simultaneous transmission system of claim 2, wherein: The first energy receiving circuit includes a first secondary LCCL resonant network and a first rectifier filter circuit; the second energy receiving circuit includes a second secondary LCCL resonant network and a second rectifier filter circuit; and the output ends of the first rectifier filter circuit and the second rectifier filter circuit are connected in parallel to supply power to a load.

5. The cross-dipole coil based full-duplex wireless power signal simultaneous transmission system of claim 1, wherein: The primary first signal transmitting circuit includes a primary first signal source, a primary first signal transmitting wave blocking network, a primary first filter capacitor and a primary first current-limiting resistor; one end of the primary first signal source is connected to one end of the first winding in the primary cross-dipole coil through the primary first signal transmitting wave blocking network and the primary first filter capacitor in sequence; and the other end of the first winding in the primary cross-dipole coil is connected to the other end of the primary first signal source through the primary first current-limiting resistor. The primary second signal transmitting circuit includes a primary second signal source, a primary second signal transmitting wave blocking network, a primary second filter capacitor and a primary second current-limiting resistor; one end of the primary second signal source is connected to one end of the second winding in the primary cross-dipole coil through the primary second signal transmitting wave blocking network and the primary second filter capacitor in sequence; and the other end of the second winding in the primary cross-dipole coil is connected to the other end of the primary second signal source through the primary second current-limiting resistor. A1 point is the connection point of the primary side first signal transmission wave blocking network and the primary side first filter capacitor, B1 point is the connection point of the primary side first current limiting resistor and the primary side first signal source, C1 point is the connection point of the primary side second signal transmission wave blocking network and the primary side second filter capacitor, and D1 point is the connection point of the primary side second current limiting resistor and the primary side second signal source.

6. The cross-dipole coil based full-duplex wireless power signal simultaneous transmission system of claim 5, wherein: The primary side signal receiving circuit is connected between A1 point and D1 point, and the primary side main channel wave blocking network is connected between B1 point and C1 point. The primary side signal receiving circuit includes a primary side signal sampling resistor, a compensation inductor and a primary side signal receiving wave blocking network, and the secondary side signal receiving circuit includes a secondary side signal sampling resistor, a compensation capacitor and a secondary side signal receiving wave blocking network. The primary side signal receiving wave blocking network, the primary side main channel wave blocking network, the secondary side main channel wave blocking network and the secondary side signal receiving wave blocking network all adopt two LC series resonators in parallel; the primary side first signal transmission wave blocking network, the primary side second signal transmission wave blocking network, the secondary side first signal transmission wave blocking network and the secondary side second signal transmission wave blocking network all adopt a single LC parallel resonator.

7. The cross-dipole coil based full-duplex wireless power signal simultaneous transmission system of claim 6, wherein: The signals emitted by the primary side first signal source and the primary side second signal source adopt a first preset frequency and are 90° out of phase; the signals emitted by the secondary side first signal source and the secondary side second signal source adopt a second preset frequency and are 90° out of phase.

8. The cross-dipole coil based full-duplex wireless power signal simultaneous transmission system of claim 7, wherein: ​ 9. The cross-dipole coil based full-duplex wireless power signal simultaneous transmission system of claim 8, wherein: ​

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