Magnetic coupling wireless energy signal synchronous transmission system based on hybrid modulation

Abstract

The present invention relates to wireless power transmission technology, and specifically discloses a magnetically coupled wireless energy signal synchronous transmission system based on hybrid modulation. The system includes a magnetically coupled wireless energy transmission channel, and is characterized in that a primary side wave blocking network, a primary side dual-resonance topology module, a primary side signal transmitting circuit, a primary side signal receiving circuit, and a primary side communication mode switching switch are provided at the energy transmitting end of the magnetically coupled wireless energy transmission channel; an energy receiving end of the magnetically coupled wireless energy transmission channel is provided with a secondary side wave blocking network, a secondary side dual-resonance topology module, a secondary side signal transmitting circuit, a secondary side signal receiving circuit, and a secondary side communication mode switching switch; the dual-resonance network and the wave blocking network are used to transmit two carriers of different frequencies between the primary and secondary sides of the system, and the single-frequency carrier of the traditional ASK modulation is converted into a dual-frequency carrier. At the same time as the ASK modulation, FSK modulation is mixed, thereby improving the signal transmission rate of the system.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless energy transmission, and in particular to a magnetic coupling wireless energy signal synchronous transmission system based on hybrid modulation. Background Art

[0002] Wireless power transmission (WPT) technology, which transmits electrical energy through non-electrical contact, has a wide range of applications. With its development, WPT, as a safe and flexible power supply technology, has been widely adopted in electric vehicles, rotating equipment, biomedical technology, consumer electronics, and household appliances. However, in practical applications, WPT systems often require information exchange between the primary and secondary sides (for example, to achieve closed-loop control and data transmission). In order to realize information transmission in wireless power transmission systems, the main methods currently studied at home and abroad are: Reference [1] changes the resonant state of the system by changing the size of the primary and secondary resonant capacitors while keeping the system switching frequency unchanged, and then realizes bidirectional transmission of signals by detecting the changes in the primary and secondary coil voltages. This method has a greater impact on energy transmission; Reference [2] and Reference [3] add energy control switches to the main circuit and realize signal transmission through amplitude modulation keying, but this method can only realize unidirectional transmission of signals and has a greater impact on energy transmission; Reference [4] realizes signal transmission by changing the frequency of the primary inverter, but this method has a greater impact on energy transmission and can only realize unidirectional transmission of signals; Reference [5] realizes signal transmission by adding a signal transmission channel to the original system, such as adding a pair of signal transmission coils. This method has little impact on energy transmission, but it requires an additional pair of signal transmission coils in the coupling mechanism, which increases the complexity of system design. Reference [6] uses a flyback converter on the primary side and a BUCK converter on the secondary side. By adjusting the duty cycle of the primary and secondary side switches, the secondary side current amplitude and the time when the primary side current passes through zero are changed respectively, thereby achieving bidirectional signal transmission. However, its transmission rate is only 120 bps. The above-mentioned MC-WPT system energy and signal simultaneous transmission method has the disadvantages of having a greater impact on energy transmission or a lower signal transmission rate.

[0003] References:

[0004] [1] Liu Xiaosheng, Gu Xuanpu, Yao Yousu, Xu Dianguo. Synchronous transmission of signal and power in wireless power transmission system based on capacitance modulation[J]. Electric Power Automation Equipment, 2018, 38(03): 140-146+154.

[0005] [2] Yang Qingxin et al., Magnetic coupling resonant wireless power and signal synchronous transmission method based on amplitude shift keying. Transactions of the Chinese Society of Electrotechnical Engineering, 2017.32(16): pp.153-161.

[0006] [3] Du Xiu, Wang Jianqiang and Cheng Pengtian. Comparative analysis of coupled mode theory and circuit theory in magnetic coupled wireless energy transmission. Transactions of the Chinese Society of Electrotechnical Engineering, 2013.28(S2): pp. 7-12.

[0007] [4] Sun Yue, Wang Chenchen, Tang Chunsen, Dai Xin, Wang Zhihui. Energy and signal hybrid transmission technology of CPT system[J]. New Technology of Electrical Engineering and Power, 2010, 29(04):10-13+22.

[0008] [5]Sato F, Nomoto T, Kano G, et al. A new contactless power-signaltransmission device for implanted functional electrical stimulation (FES) [J]. IEEE Transactions on Magnetics, 2006, 40(4): 2964-2966.

[0009] [6] C.Huang and C.Lin, "Wireless Power and Bidirectional Data TransferScheme for Battery Charger," in IEEE Transactions on Power Electronics, vol.33, no. 6, pp.4679-4689, June 2018. Summary of the Invention

[0010] In view of this, the purpose of the present invention is to provide a magnetically coupled wireless energy signal synchronous transmission system based on hybrid modulation, utilizing the coupling mechanism of the original wireless power transmission system to construct a signal transmission circuit with dual resonance points, so that the signal transmission channel can simultaneously transmit sinusoidal carriers of two frequencies, and convert the original ASK modulated single carrier into a modulated dual carrier. On the basis of the original ASK modulation, FSK modulation is performed simultaneously, thereby reducing the impact on the energy transmission channel while ensuring a sufficient signal transmission rate.

[0011] To achieve the above purpose, the specific technical solutions of the present invention are as follows:

[0012] A magnetically coupled wireless energy signal synchronous transmission system based on hybrid modulation includes a magnetically coupled wireless energy transmission channel. The key lies in that a primary-side wave blocking network, a primary-side dual-resonance topology module, a primary-side signal transmitting circuit, a primary-side signal receiving circuit, and a primary-side communication mode switching switch are provided at the energy transmitting end of the magnetically coupled wireless energy transmission channel; and a secondary-side wave blocking network, a secondary-side dual-resonance topology module, a secondary-side signal transmitting circuit, a secondary-side signal receiving circuit, and a secondary-side communication mode switching switch are provided at the energy receiving end of the magnetically coupled wireless energy transmission channel.

[0013] The primary side wave-blocking network is connected in series to the wireless energy transmitting channel, and the secondary side wave-blocking network is connected in series to the wireless energy receiving channel; the primary side dual-resonance topology module and the wireless energy transmitting channel share a wireless energy transmitting coil, and the secondary side dual-resonance topology module and the wireless energy receiving channel share a wireless energy receiving coil; the primary side signal transmitting circuit and the secondary side signal transmitting circuit both adopt an ASK and FSK hybrid modulation circuit; when the signal is transmitted in the forward direction, the primary side dual-resonance topology module is connected to the primary side signal transmitting circuit through the primary side communication mode switching switch, and the secondary side dual-resonance topology module is connected to the secondary side signal receiving circuit through the secondary side communication mode switching switch; when the signal is transmitted in the reverse direction, the secondary side dual-resonance topology module is connected to the secondary side signal transmitting circuit through the secondary side communication mode switching switch; the primary side dual-resonance topology module is connected to the primary side signal receiving circuit through the primary side communication mode switching switch.

[0014] Optionally, the wireless energy transmission channel includes a DC power supply, a high-frequency inverter module, a primary-side resonant compensation capacitor and a wireless energy transmission coil, and the primary-side wave-blocking network, the primary-side resonant compensation capacitor and the wireless energy transmission coil are connected in series in sequence; the wireless energy receiving channel includes a wireless energy receiving coil, a secondary-side resonant compensation capacitor, a rectifier and filtering module and a load interface, and the wireless energy receiving coil, the secondary-side resonant compensation capacitor and the secondary-side wave-blocking network are connected in series in sequence.

[0015] Optionally, the primary side wave-blocking network includes a primary side compensation capacitor, a primary side first parallel resonant wave-blocking network and a primary side second parallel resonant wave-blocking network connected in sequence, and the secondary side wave-blocking network includes a secondary side second parallel resonant wave-blocking network, a secondary side first parallel resonant wave-blocking network and a secondary side compensation capacitor connected in sequence; the wave-blocking frequency of the primary side first parallel resonant wave-blocking network and the secondary side first parallel resonant wave-blocking network is the first carrier frequency of FSK modulation in the ASK and FSK hybrid modulation circuit, and the wave-blocking frequency of the primary side second parallel resonant wave-blocking network and the secondary side second parallel resonant wave-blocking network is the second carrier frequency of FSK modulation in the ASK and FSK hybrid modulation circuit.

[0016] Optionally, the ASK and FSK hybrid modulation circuit includes an ASK modulation module and an FSK modulation module connected in series with each other, the ASK modulation module is provided with a first impedance channel, a second impedance channel and an ASK modulation switch; the FSK modulation module is provided with a first carrier signal module, a second carrier signal module and an FSK modulation switch.

[0017] Optionally, transformers are provided in both the primary-side signal transmitting circuit and the secondary-side signal transmitting circuit.

[0018] Optionally, the primary-side signal receiving circuit and the secondary-side signal transmitting circuit are both provided with a sampling resistor, a signal amplifier, an ASK demodulation module and an FSK demodulation module.

[0019] Optionally, in the ASK and FSK hybrid modulation circuit, the second carrier frequency of FSK modulation is greater than the first carrier frequency of FSK modulation and is greater than the operating frequency of the magnetic coupling wireless energy transmission channel.

[0020] Optionally, the primary side dual-resonance topology module and the secondary side dual-resonance topology module have the same circuit structure, both include an LC parallel resonant network and an LC series resonant network connected in series with each other, and there are two resonant frequency points, wherein the first resonant frequency point is the first carrier frequency of FSK modulation in the ASK and FSK hybrid modulation circuit, and the second resonant frequency point is the second carrier frequency of FSK modulation in the ASK and FSK hybrid modulation circuit.

[0021] The remarkable effects of the present invention are:

[0022] The present invention uses ASK and FSK hybrid modulation to simultaneously transmit signals of two carrier frequencies in a signal transmission loop. The demodulation circuit restores the signals transmitted by different modulation methods, thereby improving the signal transmission rate. The original single-frequency sinusoidal carrier is converted into a dual-frequency sinusoidal carrier. From the voltage waveform of the signal sampling resistor, it can be seen that its voltage signal contains both envelope information and frequency information. When the envelope is at a high level, the carrier has both high-frequency and low-frequency sinusoidal waves. Therefore, FSK demodulation can be achieved while ASK demodulation is being performed, thereby improving the signal transmission rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a dual-resonance topology diagram provided by an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 The impedance of the resonant network of the dual-resonance topology structure shown in the figure changes with the angular frequency;

[0025] Figure 3 This is a diagram of a wave-blocking network structure provided by an embodiment of the present invention;

[0026] Figure 4 is a schematic diagram of a system circuit provided by an embodiment of the present invention;

[0027] Figure 5 is an equivalent circuit diagram when the signal carrier acts alone in an embodiment of the present invention;

[0028] Figure 6 is an equivalent circuit diagram of the energy transmission channel in an embodiment of the present invention;

[0029] Figure 7 This is a signal demodulation flow chart in an embodiment of the present invention.

[0030] Figure 8 1 is a waveform diagram of the ASK and FSK modulation output voltages during the simulation verification process of an embodiment of the present invention;

[0031] Figure 9 1 is a waveform diagram of the sampling resistor voltage during the simulation verification process of the embodiment of the present invention;

[0032] Figure 10 This is a signal demodulation waveform diagram during the simulation verification process of an embodiment of the present invention;

[0033] Figure 11 It is a waveform diagram of the energy channel during the simulation verification process of the embodiment of the present invention. DETAILED DESCRIPTION

[0034] The following describes the embodiments of the present invention in detail with reference to the accompanying drawings. The embodiments are provided for illustrative purposes only and are not to be construed as limiting the present invention. The accompanying drawings are provided for reference and illustration only and do not constitute a limitation on the scope of protection of the present invention. Many changes may be made to the present invention without departing from the spirit and scope of the present invention.

[0035] In order to better understand the design concept of the present invention, the dual-resonance topology structure and the wave-blocking network are briefly introduced below.

[0036] The dual-resonance topology has two resonance points, so the dual-resonance topology can be used to construct a dual-frequency carrier transmission channel to achieve wireless transmission of dual-frequency carrier signals.

[0037] like Figure 1 As shown, the dual-resonance topology consists of an inductor L pp , capacitor C pp Parallel network and inductor L ss , capacitor C ss The series network is constructed in series.

[0038] Dual resonant topology impedance:

[0039]

[0040] The curve that changes with angular frequency ω is as follows Figure 2 As shown by Figure 2 It can be seen that the system has two resonant frequency points ω1 and ω2, where ω1<ω p <ω2.

[0041] The frequency of the resonant point is:

[0042]

[0043] At the resonant points ω1 and ω2, the impedance of the resonant topology is minimum, so the signals with angular frequencies ω1 and ω2 can pass through the topology smoothly.

[0044] The wave blocking network is mainly composed of a parallel resonant network and compensation capacitors, such as Figure 3 As shown. Where L r 、C r satisfy:

[0045]

[0046] ω r is the blocking frequency of the blocking network, and the parallel resonant impedance is:

[0047]

[0048] It can be seen that when ω=ω r When the parallel network impedance is infinite, the diagonal frequency is ω r The signal carrier is equivalent to an open circuit, which can prevent the angular frequency of ω r The signal carrier enters the energy circuit, eliminating the weakening of the signal carrier by the energy circuit. r 、C r The parallel network is inductive to the energy waveform with a frequency much lower than the signal carrier frequency. Therefore, the series compensation capacitor C c In order to eliminate the influence of the wave blocking network on the energy channel resonance, assuming the energy resonance angular frequency is ω0, the compensation capacitor is:

[0049]

[0050] Based on the performance of the above two basic circuits, the present invention designs a magnetic coupling wireless energy signal synchronous transmission system based on hybrid modulation, such as Figure 4 As shown in the figure, the magnetic coupling wireless energy transmission channel in the system adopts SS compensation topology, E dc is a DC power supply, S1, S2, S3, and S4 are four switching tubes and form a full-bridge high-frequency inverter module. p is the wireless energy transmitting coil, L s is the wireless energy receiving coil, Cp , is the primary side resonance compensation capacitor, C s The secondary side resonant compensation capacitor, D1-D4 and filter capacitor C d Constitute a full-bridge rectifier filter module, R L is the load connected to the load interface.

[0051] Inductor L r1 , capacitor C r1 The first parallel resonant wave-blocking network on the primary side is formed, and the inductor L r2 , capacitor C r2 The second parallel resonant wave-blocking network on the primary side is formed, and the primary compensation capacitor C c , the primary side first parallel resonant wave-blocking network and the primary side second parallel resonant wave-blocking network are connected in series in sequence to form a primary side wave-blocking network, which is arranged at the energy transmitting end of the magnetically coupled wireless energy transmission channel and is connected in series with the primary side resonant compensation capacitor and the wireless energy receiving coil in sequence;

[0052] Similarly, the inductor L r1 ', capacitor C r1 'Constitute the first parallel resonant wave-blocking network on the secondary side, inductor L r2 ', capacitor C r2 'Constitute the secondary side second parallel resonant wave blocking network, the secondary side second parallel resonant wave blocking network, the secondary side first parallel resonant wave blocking network and the secondary side compensation capacitor C c 'A secondary side wave-blocking network is connected in series in sequence. The secondary side wave-blocking network is arranged at the energy receiving end of the magnetically coupled wireless energy transmission channel, and the wireless energy receiving coil, the secondary side resonant compensation capacitor and the secondary side wave-blocking network are connected in series in sequence.

[0053] The transmitting end is also provided with a primary side dual resonance topology module, a primary side signal transmitting circuit, a primary side signal receiving circuit and a primary side communication mode switching switch; the receiving end is also provided with a secondary side dual resonance topology module, a secondary side signal transmitting circuit, a secondary side signal receiving circuit and a secondary side communication mode switching switch;

[0054] pass Figure 4 It can be seen that the primary-side dual-resonance topology module and the wireless energy transmission channel share the wireless energy transmitting coil, and the secondary-side dual-resonance topology module and the wireless energy receiving channel share the wireless energy receiving coil; Figure 4 Medium inductance L rt1 , capacitor C rt1 , capacitor C2 and wireless energy transmitting coil L p Constitute the primary side dual resonance topology module; inductor L rt2 , capacitor C rt2 , capacitor C2' and wireless energy receiving coil L sA secondary-side dual-resonance topology module is constructed; both the primary-side signal transmitting circuit and the secondary-side signal transmitting circuit adopt an ASK and FSK hybrid modulation circuit; AC1 and AC2 are signal sources (sinusoidal signals) with angular frequencies of ω1 and ω2 (ω2>ω1>>ω0), respectively, that is, the second carrier frequency of FSK modulation is greater than the first carrier frequency of FSK modulation>> the operating frequency of the magnetically coupled wireless energy transmission channel, T1 and T2 are step-up isolation transformers with primary and secondary turns ratios of 1:N, respectively, SPDT1-SPDT6 are single-pole double-throw switches, R1 and R2 are primary and secondary signal sampling resistors, respectively, and R3 and R4 are ASK modulation voltage divider resistors.

[0055] When the signal is transmitted in the forward direction, the primary side dual-resonance topology module is connected to the primary side signal transmitting circuit through the primary side communication mode switching switch, and the secondary side dual-resonance topology module is connected to the secondary side signal receiving circuit through the secondary side communication mode switching switch; when the signal is transmitted in the reverse direction, the secondary side dual-resonance topology module is connected to the secondary side signal transmitting circuit through the secondary side communication mode switching switch; the primary side dual-resonance topology module is connected to the primary side signal receiving circuit through the primary side communication mode switching switch.

[0056] Specifically, when the signal carrier acts, the impedance characteristics of the wave blocking network show that the wave blocking network is equivalent to an open circuit for the signal carrier. The system equivalent circuit is as follows: Figure 5 As shown in Figure 1, the system uses half-duplex communication. SPDT3 and SPDT4 switch between AC1 and AC2 at a certain frequency (FSK modulation rate). SPDT5 and SPDT6 are turned on and off at a certain frequency (ASK modulation rate).

[0057] When no signal is transmitted, SPDT1 and SPDT2 are connected to R1 and R2 respectively.

[0058] When the signal is transmitted in the forward direction (from the primary side to the secondary side), SPDT1 is connected to the transformer and SPDT2 remains unchanged. At this time, the signal is transmitted by AC1 and AC2 through the coupling coil L. p and L s The signal is then transferred to the secondary sampling resistor R2. When the signal is transmitted in the reverse direction (from the secondary side to the primary side), the system works in the same way as in the forward direction.

[0059] For the convenience of calculation, the primary and secondary sides of the signal transmission channel take the same parameters. rt1 and C rt1 The parallel network is inductive, with an equivalent inductance of:

[0060]

[0061] The signal carrier with diagonal frequency ω1, L p The series network formed by C2 is capacitive, and the equivalent capacitance is:

[0062]

[0063] The signal carrier with diagonal frequency ω2, L rt1 and C rt1 The parallel network formed is capacitive, and the equivalent capacitance is:

[0064]

[0065] The diagonal frequency is the signal carrier with diagonal frequency ω2, L s The series network formed by C2' is inductive, with an equivalent inductance of:

[0066]

[0067] When the signal is transmitted in the forward direction (from the primary side to the secondary side), the voltage of the voltage source AC1 is The voltage picked up by R2 due to the action of AC1 is Then the transfer function from voltage source AC1 to R2 is:

[0068]

[0069] Similarly, let the voltage of voltage source AC2 be The voltage picked up by R2 due to the action of AC2 is Then the transfer function from voltage source AC2 to R2 is:

[0070]

[0071] When the signal is transmitted in the reverse direction (from the secondary side to the primary side), the transfer function from the voltage source AC1 to R1 is:

[0072]

[0073] The transfer function from voltage source AC2 to R1 is

[0074]

[0075] As for energy transmission, when the inverter power supply acts alone, it can be seen from formula (5) that the wave blocking network is short-circuited at the energy frequency. Since ω2>ω1>>ω0, the signal channel is in a high-impedance state at the energy frequency, which is approximately an open circuit. Therefore, the energy channel circuit can be equivalent to Figure 6 shown.

[0076] According to the SS compensation topology, when the system operates at the resonant frequency ω0, L p 、C p and L s 、C sThe energy waveform with a diagonal frequency of ω0 is a short circuit.

[0077] Equivalent resistance R before rectifier bridge eq for:

[0078]

[0079] Reflected impedance:

[0080]

[0081] Primary current:

[0082]

[0083] Secondary side pickup voltage:

[0084] U s =jωMI p (17)

[0085] From inverter voltage U0 to load R L Voltage U RL The transfer function is:

[0086]

[0087] For signal demodulation, usually the primary signal receiving circuit and the secondary signal transmitting circuit are both equipped with sampling resistors, signal amplifiers, ASK demodulation modules and FSK demodulation modules. Figure 7 As shown in the figure, after the sampling resistor collects the voltage, the proportional amplifier circuit amplifies the signal to an appropriate range. ASK and FSK demodulation are then performed, respectively. ASK demodulation uses a non-coherent demodulation method. The signal passes through the envelope detector to obtain the envelope waveform. After comparison with the reference voltage of the comparator, the ASK modulated signal is restored. FSK demodulation uses a coherent demodulation method. First, the carrier signal with an angular frequency of ω1 is filtered out by a bandpass filter. Then, it is multiplied by a multiplier with a reference signal coherent with the carrier frequency. A low-pass filter is used to remove the high-frequency carrier signal, resulting in the original high-frequency carrier signal. Envelope demodulation is then used to restore the FSK modulated signal.

[0088] In order to verify the feasibility and effectiveness of the magnetic coupling wireless energy signal synchronous transmission system based on hybrid modulation proposed in this embodiment, a simulation model of the system was constructed on the MATLAB simulation platform. According to the above analysis, a set of system parameters as shown in Table 1 were calculated. The parameters in Table 1 were substituted into the simulation model for simulation. The signal modulation waveform, sampling resistor voltage waveform and signal demodulation waveform were measured using an oscilloscope, and the following results were obtained: Figures 8-11 The simulation results are shown.

[0089] in, Figure 8It is a mixed modulation waveform of ASK and FSK. The ASK modulation method transmits signals by controlling the output voltage amplitude at a rate of 40kbps; the FSK modulation method transmits signals by controlling the carrier frequency at a rate of 10kbps. It is transmitted to the secondary side through a dual-resonance topology network. The sampling resistor voltage waveform is as follows: Figure 9 As shown, the signal transmission will be interfered by the energy channel, and it can be restored after the filtering amplifier circuit and the demodulation circuit. Figure 10 The signal waveform in Figure 11 The waveform diagram of the energy channel is shown in Figure 2. It can be seen that the signal is accurately and quickly transmitted without affecting the normal transmission of energy.

[0090] The system proposed in the present invention is compared with the existing energy signal simultaneous transmission system in terms of the interference of signal transmission on energy, the number of coils, and the transmission rate. The comparison results are shown in Table 2.

[0091] Table 1 Main parameters of the system

[0092]

[0093] Table 2 Comparison of energy signal simultaneous interpretation systems

[0094]

[0095] The above analysis reveals that, to address the low transmission rate of traditional WPT energy signal transmission systems using a single-frequency carrier for ASK modulation, the present invention, taking the SS-compensated energy transmission system as an example, proposes a dual-resonance topology that employs ASK and FSK hybrid modulation to simultaneously transmit signals of two carrier frequencies within the signal transmission loop. The demodulation circuit then recovers the signals transmitted by the different modulation methods, thereby improving the signal transmission rate. The original single-frequency sinusoidal carrier is converted into a dual-frequency sinusoidal carrier. The voltage waveform across the signal sampling resistor shows that the voltage signal contains both envelope information and frequency information. When the envelope is high, the carrier wave contains both high-frequency and low-frequency sinusoidal waves. Therefore, FSK demodulation can be achieved simultaneously with ASK demodulation. Simulation results show that the total system signal transmission rate is 50 kbps, which is the sum of the ASK modulation transmission rate and the FSK modulation transmission rate, thus improving the signal transmission rate.

[0096] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A magnetically coupled wireless energy signal synchronous transmission system based on hybrid modulation, comprising a magnetically coupled wireless energy transmission channel, characterized in that: The energy transmitting end of the magnetically coupled wireless energy transmission channel is provided with a primary side wave blocking network, a primary side dual resonance topology module, a primary side signal transmitting circuit, a primary side signal receiving circuit and a primary side communication mode switching switch; the energy receiving end of the magnetically coupled wireless energy transmission channel is provided with a secondary side wave blocking network, a secondary side dual resonance topology module, a secondary side signal transmitting circuit, a secondary side signal receiving circuit and a secondary side communication mode switching switch; The primary side wave-blocking network is connected in series to the wireless energy transmitting channel, and the secondary side wave-blocking network is connected in series to the wireless energy receiving channel; the primary side dual-resonance topology module and the wireless energy transmitting channel share a wireless energy transmitting coil, and the secondary side dual-resonance topology module and the wireless energy receiving channel share a wireless energy receiving coil; the primary side signal transmitting circuit and the secondary side signal transmitting circuit both adopt an ASK and FSK hybrid modulation circuit; when the signal is transmitted in the forward direction, the primary side dual-resonance topology module is connected to the primary side signal transmitting circuit through the primary side communication mode switching switch, and the secondary side dual-resonance topology module is connected to the secondary side signal receiving circuit through the secondary side communication mode switching switch; when the signal is transmitted in the reverse direction, the secondary side dual-resonance topology module is connected to the secondary side signal transmitting circuit through the secondary side communication mode switching switch; the primary side dual-resonance topology module is connected to the primary side signal receiving circuit through the primary side communication mode switching switch; The primary side wave-blocking network includes a primary side compensation capacitor, a primary side first parallel resonant wave-blocking network and a primary side second parallel resonant wave-blocking network connected in sequence; the secondary side wave-blocking network includes a secondary side second parallel resonant wave-blocking network, a secondary side first parallel resonant wave-blocking network and a secondary side compensation capacitor connected in sequence; the wave-blocking frequencies of the primary side first parallel resonant wave-blocking network and the secondary side first parallel resonant wave-blocking network are the first carrier frequency of the FSK modulation in the ASK and FSK hybrid modulation circuit, and the wave-blocking frequencies of the primary side second parallel resonant wave-blocking network and the secondary side second parallel resonant wave-blocking network are the second carrier frequency of the FSK modulation in the ASK and FSK hybrid modulation circuit.

2. The magnetically coupled wireless energy signal synchronous transmission system based on hybrid modulation according to claim 1 is characterized in that: The wireless energy transmission channel includes a DC power supply, a high-frequency inverter module, a primary-side resonant compensation capacitor and a wireless energy transmission coil, and the primary-side wave blocking network, the primary-side resonant compensation capacitor and the wireless energy transmission coil are connected in series in sequence; the wireless energy receiving channel includes a wireless energy receiving coil, a secondary-side resonant compensation capacitor, a rectifier and filtering module and a load interface, and the wireless energy receiving coil, the secondary-side resonant compensation capacitor and the secondary-side wave blocking network are connected in series in sequence.

3. The magnetically coupled wireless energy signal synchronous transmission system based on hybrid modulation according to claim 1 is characterized in that: The ASK and FSK hybrid modulation circuit includes an ASK modulation module and an FSK modulation module connected in series. The ASK modulation module is provided with a first impedance channel, a second impedance channel and an ASK modulation switch; the FSK modulation module is provided with a first carrier signal module, a second carrier signal module and an FSK modulation switch.

4. The magnetically coupled wireless energy signal synchronous transmission system based on hybrid modulation according to claim 1 or 3, characterized in that: Transformers are provided in both the primary-side signal transmitting circuit and the secondary-side signal transmitting circuit.

5. The magnetic coupling wireless energy signal synchronous transmission system based on hybrid modulation according to claim 1 or 3, characterized in that: The primary side signal receiving circuit and the secondary side signal transmitting circuit are both provided with a sampling resistor, a signal amplifier, an ASK demodulation module and an FSK demodulation module.

6. The magnetically coupled wireless energy signal synchronous transmission system based on hybrid modulation according to claim 1, characterized in that: In the ASK and FSK hybrid modulation circuit, the second carrier frequency of FSK modulation is greater than the first carrier frequency of FSK modulation The operating frequency of the magnetically coupled wireless energy transfer channel.

7. The magnetically coupled wireless energy signal synchronous transmission system based on hybrid modulation according to claim 1, characterized in that: The primary side dual-resonance topology module and the secondary side dual-resonance topology module have the same circuit structure, both include an LC parallel resonant network and an LC series resonant network connected in series with each other, and have two resonant frequency points, wherein the first resonant frequency point is the first carrier frequency of FSK modulation in the ASK and FSK hybrid modulation circuit, and the second resonant frequency point is the second carrier frequency of FSK modulation in the ASK and FSK hybrid modulation circuit.

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