Dual-channel wireless electric energy and information synchronous transmission device based on series-parallel resonant circuit and parameter design method of dual-channel wireless electric energy and information synchronous transmission device

Abstract

The invention discloses a dual-channel wireless electric energy and information synchronous transmission device based on a series-parallel resonant circuit and a parameter design method thereof, and the device comprises an energy transmitting side, an energy receiving side, an information transmission channel I and an information transmission channel II. Two series resonance frequency points of a series-parallel resonance circuit are designed in a targeted mode and serve as carrier frequencies of two independent communication channels, and parallel high-speed transmission of dual-channel information under a single coupling coil structure is achieved. Compared with a mainstream energy and information simultaneous transmission system, the system provided by the invention has the advantages that the channel capacity of the system is doubled by constructing two virtual information transmission channels on a single physical channel, and the multiplication of the transmission rate is realized.

Description

Technical Field

[0001] This invention belongs to the field of wireless power transmission technology, specifically relating to a dual-channel wireless power and information synchronization transmission device based on a series-parallel resonant circuit and its parameter design method. Background Technology

[0002] Wireless Power Transfer (WPT) technology has become a major research hotspot in the field of modern power transfer. Many practical applications require not only wireless power transmission but also real-time one-way or two-way synchronous information transmission capabilities. Since electromagnetic waves are essentially dual carriers of energy and information, Simultaneous Wireless Power and Data Transfer (SWPDT) technology, with its advantages of convenience, security, and high reliability, has attracted increasing attention. Existing SWPDT technology mainly relies on a single-input, single-output channel to achieve information transmission. To improve power transfer performance, the power transfer channel typically operates at a fixed resonant frequency, resulting in a high quality factor and narrow effective bandwidth, which greatly limits the information transmission rate and makes it difficult to meet the ever-increasing demand for high-speed data interaction. Therefore, there is an urgent need in this field for a method to achieve high information transmission rates on inherently narrow bandwidth channels. The purpose of this invention is to provide a dual-channel wireless power and information synchronization transmission device based on a series-parallel resonant circuit and its parameter design method. This method, through targeted design of the two series resonant frequencies of the series-parallel resonant circuit, uses them as carrier frequencies for two independent communication channels, achieving high-speed parallel information transmission across two channels under a single coupled coil structure. Compared to mainstream power and information simultaneous transmission systems, this invention, by constructing two virtual information transmission channels on a single physical channel, doubles the system channel capacity, thus doubling the transmission rate. Summary of the Invention

[0003] The purpose of this invention is to solve the technical problem that it is difficult to achieve high information transmission rates in existing single-input single-output channel SWPDT systems due to narrow channel bandwidth. This invention provides a dual-channel wireless power and information synchronization transmission device based on a series-parallel resonant circuit and its parameter design method. By using the two series resonant frequencies of the series-parallel resonant circuit to transmit information, two information transmission channels are constructed, effectively expanding the channel capacity and realizing dual-channel parallel high-speed information transmission under a single coupled coil structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a dual-channel wireless power and information synchronization transmission device based on a series-parallel resonant circuit, which includes an energy transmitting side, an energy receiving side, an information transmission channel I, and an information transmission channel II;

[0005] The energy emitting side includes an energy emitting coil L. p Energy emission compensation topology, DC power supply U p and inverter circuit, in which DC power supply U p Connected to the inverter circuit, the energy transmitting coil L p From transmitting coil L p1 Transmitting coil L p2 and transmitting coil L p3 The composition satisfies the following relationship: Where, k p1p2 For transmitting coil L p1 With transmitting coil L p2 The coupling coefficient between them, k p1p3 For transmitting coil L p1 With transmitting coil L p3 The coupling coefficient between them, k p2p3 For transmitting coil L p2 With transmitting coil L p3 The coupling coefficient between them;

[0006] The energy emission compensation topology includes a compensation inductor L. f1 1. Supplement capacitor C f1 and compensation capacitor C p The compensation capacitor C p Due to the sub-capacitor C p1 Sub-capacitor C p2 Capacitor C p3 Composition, satisfying: 1 / C p1 +1 / C p2 +1 / C p3 =1 / C p , Compensating inductor L f1 One end is connected to the output of the inverter circuit, and the compensation inductor L f1 The other end is connected to the compensation capacitor C. f1 Capacitor C p3 The common-line terminals are connected, and the compensation capacitor C is used. f1 The other end connects to the input terminal of the inverter circuit and the sub-capacitor C. p1 The collinear terminals are connected, and the sub-capacitor C p1 The other end is connected to the transmitting coil L p1 One end is connected to the transmitting coil L. p1 The other end is connected to the sub-capacitor C p2 One end is connected, sub-capacitor C p2 The other end is connected to the transmitting coil L p2 One end is connected to the transmitting coil L. p2 The other end is connected to the transmitting coil L p3 One end is connected to the transmitting coil L. p3 The other end is connected to the sub-capacitor Cp3 The other end is connected;

[0007] The receiving side consists of an energy receiving coil L s The system includes an energy receiving compensation topology, a rectifier and filter circuit, and a load, wherein the energy receiving coil L... s By receiving coil L s1 Receiver coil L s2 With receiving coil L s3 The composition satisfies the following relationship: Where, k s1s2 For receiving coil L s1 With receiving coil L s2 The coupling coefficient between them, k s1s3 For receiving coil L s1 With receiving coil L s3 The coupling coefficient between them, k s2s3 For receiving coil L s2 With receiving coil L s3 The coupling coefficient between them, the rectifier filter in the rectifier filter circuit and the load R respectively L Connect it to the compensation capacitor C0;

[0008] The energy receiving compensation topology includes a compensation inductor L. f2 Compensation capacitor C s and supplementary capacitor C f2 The compensation capacitor C s Due to the sub-capacitor C s1 Sub-capacitor C s2 Capacitor C s3 Composition, satisfying: 1 / C s1 +1 / C s2 +1 / C s3 =1 / C s , Compensating inductor L f2 One end is connected to the input terminal of the rectifier filter, and the compensation inductor L f2 The other end is connected to the compensation capacitor C. f2 Capacitor C s3 The common-line terminals are connected, and the compensation capacitor C is used. f2 The other end connects to the output of the rectifier filter and the sub-capacitor C. s1 The collinear terminals are connected, and the sub-capacitor C s1 The other end is connected to the receiving coil L s1 One end is connected to the receiving coil L. s1 The other end is connected to the sub-capacitor C s2 One end is connected, sub-capacitor C s2 The other end is connected to the receiving coil L s2 One end is connected to the receiving coil L. s2 The other end is connected to the receiving coil L s3One end is connected to the receiving coil L. s3 The other end is connected to the sub-capacitor C s3 The other end is connected, above ω p All are energy carrier angular frequencies;

[0009] Both the energy emission compensation topology and the energy reception compensation topology are LCC compensation topologies, with compensation inductors L on both sides. f1 With compensation inductor L f2 Compensation capacitor C f1 With compensation capacitor C f2 Compensation capacitor C p With compensation capacitor C s satisfy:

[0010] The information transmission channel I includes information transmitting circuit 1-1, information transmitting circuit 1-2, information receiving circuit 1-1, and information receiving circuit 1-2. The information transmission channel II includes information transmitting circuit 2-1, information transmitting circuit 2-2, and information receiving circuit 2-1 and information receiving circuit 2-2. Information transmitting circuit 1-1 and information transmitting circuit 2-1 have the same structure and parameters, and both use a series-parallel resonant circuit topology. This series-parallel resonant circuit includes a parallel resonant cavity and a series resonant cavity. The parallel resonant cavity of information transmitting circuit 1-1 consists of inductors L connected in parallel. dp1 With capacitor C dp1 Composition, satisfying: The series resonant cavity of information transmission circuit 1-1 consists of inductors L connected in series. ds1 With capacitor C ds1 Composition, satisfying: Where the capacitance C ds1 The other end is connected to inductor L dp1 With capacitor C dp1 The common-line terminals on one side are connected, and the inductor L ds1 The other end is connected to inductor L dp1 With capacitor C dp1 The other side is connected to the collinear terminal; the parallel resonant cavity of the information transmission circuit 2-1 is composed of inductors L connected in parallel. dp2 With capacitor C dp2 Composition, satisfying: The series resonant cavity of information transmission circuit 2-1 consists of inductors L connected in series. ds2 With capacitor C ds2 Composition, satisfying: Where the capacitance C ds2 The other end is connected to inductor L dp2 With capacitor C dp2 The common-line terminals on one side are connected, and the inductor L ds2 The other end is connected to inductor L dp2 With capacitor C dp2The collinear ends on the other side are connected, above ω d All are channel center angular frequencies; the information transmitting circuit 1-2, information receiving circuit 1-1, information receiving circuit 1-2, information transmitting circuit 2-2, information receiving circuit 2-1, and information receiving circuit 2-2 all adopt a series compensation topology, wherein information transmitting circuit 1-2 and information transmitting circuit 2-2 are respectively loaded on the transmitting coil L p1 Series capacitor C p1 Both ends of the branch and the transmitting coil L p3 Series capacitor C p3 At both ends of the branch, the information transmission circuits 1-2 are connected in series with compensation capacitors C. e1 and inductor L dt1 Composition, inductor L dt1 With inductor L ds1 Mutual inductance, information transmission circuit 2-2 consists of compensation capacitors C connected in series. e3 and inductor L dt2 Composition, inductor L dt2 With inductor L ds2 Mutual inductance; the information receiving circuit 1-2 consists of compensation capacitors C connected in series. dr1 Inductor L dr12 and resistance R dr1 The information receiving circuit 2-2 consists of compensation capacitors C connected in series. dr2 Inductor L dr22 and resistance R dr2 Composition; the information receiving circuit 1-1 and the information receiving circuit 2-1 are respectively loaded onto the receiving coil L s1 Series capacitor C s1 Both ends of the branch and the receiving coil L s3 Series capacitor C s3 At both ends of the branch, the information receiving circuit 1-1 consists of compensation capacitors C connected in series. e2 and inductor L dr11 Composition, inductor L dr11 With inductor L dr12 Mutual inductance, the information receiving circuit 2-1 consists of compensation capacitors C connected in series. e4 and inductor L dr21 Composition, inductor L dr21 With inductor L dr22 Mutual induction;

[0011] The information receiving voltages of information transmission channel I and information transmission channel II are respectively the series resistor R of information receiving circuit 1-2 and information receiving circuit 2-2. dr1 R dr2 Voltage U across the terminals dr1 U dr2The carrier frequencies of information transmission channel I and information transmission channel II are the two series resonant frequencies of a series-parallel resonant circuit, respectively f_i and f_ii. d1 f d2 , satisfying: f d1 <f d <f d2 , where f d This is the center frequency of the channel.

[0012] Further specifying, the transmitting coil L p1 Transmitting coil L p2 Transmitting coil L p3 Receiver coil L s1 Receiver coil L s2 and receiving coil L s3 All are circular coils, with the transmitting coil L p1 With receiving coil L s1 Parallel relative arrangement, transmitting coil L p2 With receiving coil L s2 Parallel relative arrangement, transmitting coil L p3 With receiving coil L s3 Parallel relative arrangement, transmitting coil L p1 Transmitting coil L p2 and transmitting coil L p3 The receiving coils L are arranged side by side on the same plane. s1 Receiver coil L s2 and receiving coil L s3 They are arranged side by side on the same plane.

[0013] A parameter design method for a dual-channel wireless power and information synchronization transmission device based on a series-parallel resonant circuit includes the following steps:

[0014] Step S1: Establish an equivalent circuit model for a bilateral LCC-compensated wireless power and information synchronization transmission device;

[0015] Step S2: Calculate the transmitter-side compensation inductance L f1 Receiver-side compensation inductor L f2 The relational model is as follows:

[0016]

[0017] In the formula, ω p M is the energy carrier angular frequency; ps For transmitting coil L p With receiving coil L s Mutual intuition between them; I L This is the load current;

[0018] Step S3: Calculate the parallel compensation capacitor C on the transmitting side.f1 Series compensation capacitor C p The relationship between the parameters of the coupling mechanism and the model is as follows:

[0019]

[0020] Step S4: Calculate the parallel compensation capacitor C on the receiving side. f2 Series compensation capacitor C s The relationship between the parameters of the coupling mechanism and the model is as follows:

[0021]

[0022] Step S5: Determine the center frequency f of information transmission channel I and information transmission channel II. d ,satisfy:

[0023]

[0024] In the formula, v max f is the maximum information transmission rate of the channel, f0 is the self-resonant frequency of the energy coil, and f p For energy carrier frequency;

[0025] Step S6: Determine the parallel resonant cavity inductance L dp1 L dp2 ;

[0026] Step S7: Calculate the capacitance C of the parallel resonant cavity. dp1 C dp2 They are respectively:

[0027]

[0028] Step S8: Determine that the series resonant cavity is composed of inductor L ds1 L ds2 It must meet the following requirements:

[0029]

[0030] in

[0031]

[0032] Step S9: Calculate the series resonant cavity capacitance C ds1 C ds2 They are respectively:

[0033]

[0034] Step S7: Calculate the equivalent self-inductance L of information transmitting circuit 1-2 and information receiving circuit 1-1. e1 L e2 They are respectively:

[0035]

[0036] Step S8: Calculate the equivalent self-inductance L of the information transmitting circuit 2-2 and the information receiving circuit 2-1. e3 L e4 They are respectively:

[0037]

[0038] Step S9: Calculate the compensation capacitor C for information transmitting circuit 1-2 and information receiving circuit 1-1. e1 C e2 They are respectively:

[0039]

[0040] In the formula, L dt1 L dr11 The self-inductance of the secondary side of the transmitting-side coupling transformer TV1 and the primary side self-inductance of the receiving-side coupling transformer TV2 are for information transmission channel I.

[0041] Step S10: Calculate the compensation capacitor C for information transmitting circuit 2-2 and information receiving circuit 2-1. e3 C e4 They are respectively:

[0042]

[0043] In the formula, L dt2 L dr21 The self-inductance of the secondary side of the transmitting-side coupling transformer TV3 in information transmission channel II, and the self-inductance of the primary side of the receiving-side coupling transformer TV4;

[0044] Step S11: Calculate the compensation capacitor C for information receiving circuit 1-2 and information receiving circuit 2-2. dr1 C dr2 They are respectively:

[0045]

[0046] In the formula, L dr12 L dr22 The self-inductance of the secondary side of the receiving-side coupling transformer TV2 and the self-inductance of the secondary side of the receiving-side coupling transformer TV4 are given.

[0047] Compared with existing technologies, this invention has the following advantages and beneficial effects: Addressing the technical background of improving the performance of wireless power and information synchronous transmission, this invention proposes a dual-channel wireless power and information synchronous transmission device based on a series-parallel resonant circuit and its parameter design method. While ensuring efficient energy transmission, it overcomes the limitation of the inherent narrow bandwidth of the energy transmission channel on the information transmission rate, achieving a significant increase in information transmission rate. Compared with existing research on simultaneous power and information transmission systems, this invention utilizes a series-parallel resonant circuit to construct two virtual information transmission channels on a single physical channel, doubling the system channel capacity and achieving a doubling of the transmission rate. Furthermore, the parameter configuration in this invention does not depend on the mutual inductance between coils, achieving decoupling between parameters and mutual inductance, and improving the freedom of parameter design. Attached Figure Description

[0048] Figure 1 This is a circuit diagram of the dual-channel wireless power and information synchronization transmission device based on a series-parallel resonant circuit in this invention.

[0049] Figure 2 A schematic diagram of the coupling mechanism provided for the implementation of this invention.

[0050] Figure 3 Output current curves under different loads provided for the implementation of this invention, (a) R L =5Ω; (b)R L =8Ω; (c)R L =10Ω.

[0051] Figure 4 The baseband signal U of the information transmission channel provided for the implementation of this invention b1 (U b2 ), Information modulation signal U d1 (U d2 Information receiving voltage U dr1 (U dr2 and demodulated output voltage U de1 (U de2 Waveforms, (a) Information transmission channel I; (b) Information transmission channel II. Detailed Implementation

[0052] The following examples further illustrate the above-described content of the present invention, but it should not be construed as limiting the scope of the subject matter of the present invention to the following examples. All technologies implemented based on the above-described content of the present invention fall within the scope of the present invention.

[0053] Example 1

[0054] Please see Figures 1-2The present invention provides a dual-channel wireless power and information synchronization transmission device based on a series-parallel resonant circuit, which includes an energy transmitting side, an energy receiving side, an information transmission channel I, and an information transmission channel II.

[0055] The energy emitting side includes an energy emitting coil L. p Energy emission compensation topology, DC power supply U p and inverter circuit, in which DC power supply U p Connected to the inverter circuit, the energy transmitting coil L p From transmitting coil L p1 Transmitting coil L p2 and transmitting coil L p3 The composition satisfies the following relationship: Where, k p1p2 For transmitting coil L p1 With transmitting coil L p2 The coupling coefficient between them, k p1p3 For transmitting coil L p1 With transmitting coil L p3 The coupling coefficient between them, k p2p3 For transmitting coil L p2 With transmitting coil L p3 The coupling coefficient between them;

[0056] The energy emission compensation topology includes a compensation inductor L. f1 1. Supplement capacitor C f1 and compensation capacitor C p The compensation capacitor C p Due to the sub-capacitor C p1 Sub-capacitor C p2 Capacitor C p3 Composition, satisfying: 1 / C p1 +1 / C p2 +1 / C p3 =1 / C p , Compensating inductor L f1 One end is connected to the output of the inverter circuit, and the compensation inductor L f1 The other end is connected to the compensation capacitor C. f1 Capacitor C p3 The common-line terminals are connected, and the compensation capacitor C is used. f1 The other end connects to the input terminal of the inverter circuit and the sub-capacitor C. p1 The collinear terminals are connected, and the sub-capacitor C p1 The other end is connected to the transmitting coil L p1 One end is connected to the transmitting coil L. p1 The other end is connected to the sub-capacitor C p2 One end is connected, sub-capacitor C p2 The other end is connected to the transmitting coil Lp2 One end is connected to the transmitting coil L. p2 The other end is connected to the transmitting coil L p3 One end is connected to the transmitting coil L. p3 The other end is connected to the sub-capacitor C p3 The other end is connected;

[0057] The receiving side consists of an energy receiving coil L s The system consists of an energy receiving compensation topology, an information receiving circuit, a rectifier and filter circuit, and a load, wherein the energy receiving coil L... s By receiving coil L s1 Receiver coil L s2 With receiving coil L s3 The composition satisfies the following relationship: Where, k s1s2 For receiving coil L s1 With receiving coil L s2 The coupling coefficient between them, k s1s3 For receiving coil L s1 With receiving coil L s3 The coupling coefficient between them, k s2s3 For receiving coil L s2 With receiving coil L s3 The coupling coefficient between them, the rectifier filter in the rectifier filter circuit and the load R respectively L Connect it to the compensation capacitor C0;

[0058] The energy receiving compensation topology includes a compensation inductor L. f2 Compensation capacitor C s and supplementary capacitor C f2 The compensation capacitor C s Due to the sub-capacitor C s1 Sub-capacitor C s2 Capacitor C s3 Composition, satisfying: 1 / C s1 +1 / C s2 +1 / C s3 =1 / C s , Compensating inductor L f2 One end is connected to the input terminal of the rectifier filter, and the compensation inductor L f2 The other end is connected to the compensation capacitor C. f2 Capacitor C s3 The common-line terminals are connected, and the compensation capacitor C is used. f2 The other end connects to the output of the rectifier filter and the sub-capacitor C. s1 The collinear terminals are connected, and the sub-capacitor C s1 The other end is connected to the receiving coil L s1 One end is connected to the receiving coil L. s1 The other end is connected to the sub-capacitor C s2One end is connected, sub-capacitor C s2 The other end is connected to the receiving coil L s2 One end is connected to the receiving coil L. s2 The other end is connected to the receiving coil L s3 One end is connected to the receiving coil L. s3 The other end is connected to the sub-capacitor C s3 The other end is connected, above ω p All are energy carrier angular frequencies;

[0059] Both the energy emission compensation topology and the energy reception compensation topology are LCC compensation topologies, with compensation inductors L on both sides. f1 With compensation inductor L f2 Compensation capacitor C f1 With compensation capacitor C f2 Compensation capacitor C p With compensation capacitor C s satisfy:

[0060] The information transmission channel I includes information transmitting circuit 1-1, information transmitting circuit 1-2, information receiving circuit 1-1, and information receiving circuit 1-2. The information transmission channel II includes information transmitting circuit 2-1, information transmitting circuit 2-2, and information receiving circuit 2-1 and information receiving circuit 2-2. Information transmitting circuit 1-1 and information transmitting circuit 2-1 have the same structure and parameters, and both use a series-parallel resonant circuit topology. This series-parallel resonant circuit includes a parallel resonant cavity and a series resonant cavity. The parallel resonant cavity of information transmitting circuit 1-1 consists of inductors L connected in parallel. dp1 With capacitor C dp1 Composition, satisfying: The series resonant cavity of information transmission circuit 1-1 consists of inductors L connected in series. ds1 With capacitor C ds1 Composition, satisfying: Where the capacitance C ds1 The other end is connected to inductor L dp1 With capacitor C dp1 The common-line terminals on one side are connected, and the inductor L ds1 The other end is connected to inductor L dp1 With capacitor C dp1 The other side is connected to the collinear terminal; the parallel resonant cavity of the information transmission circuit 2-1 is composed of inductors L connected in parallel. dp2 With capacitor C dp2 Composition, satisfying: The series resonant cavity of information transmission circuit 2-1 consists of inductors L connected in series. ds2 With capacitor C ds2 Composition, satisfying: Where the capacitance C ds2 The other end is connected to inductor Ldp2 With capacitor C dp2 The common-line terminals on one side are connected, and the inductor L ds2 The other end is connected to inductor L dp2 With capacitor C dp2 The collinear ends on the other side are connected, above ω d All are channel center angular frequencies; the information transmitting circuit 1-2, information receiving circuit 1-1, information receiving circuit 1-2, information transmitting circuit 2-2, information receiving circuit 2-1, and information receiving circuit 2-2 all adopt a series compensation topology, wherein information transmitting circuit 1-2 and information transmitting circuit 2-2 are respectively loaded on the transmitting coil L p1 Series capacitor C p1 Both ends of the branch and the transmitting coil L p3 Series capacitor C p3 At both ends of the branch, the information transmission circuits 1-2 are connected in series with compensation capacitors C. e1 and inductor L dt1 Composition, inductor L dt1 With inductor L ds1 Mutual inductance, information transmission circuit 2-2 consists of compensation capacitors C connected in series. e3 and inductor L dt2 Composition, inductor L dt2 With inductor L ds2 Mutual inductance; the information receiving circuit 1-2 consists of compensation capacitors C connected in series. dr1 Inductor L dr12 and resistance R dr1 The information receiving circuit 2-2 consists of compensation capacitors C connected in series. dr2 Inductor L dr22 and resistance R dr2 Composition; the information receiving circuit 1-1 and the information receiving circuit 2-1 are respectively loaded onto the receiving coil L s1 Series capacitor C s1 Both ends of the branch and the receiving coil L s3 Series capacitor C s3 At both ends of the branch, the information receiving circuit 1-1 consists of compensation capacitors C connected in series. e2 and inductor L dr11 Composition, inductor L dr11 With inductor L dr12 Mutual inductance, the information receiving circuit 2-1 consists of compensation capacitors C connected in series. e4 and inductor L dr21 Composition, inductor L dr21 With inductor L dr22 Mutual induction;

[0061] The information receiving voltages of information transmission channel I and information transmission channel II are respectively the series resistor R of information receiving circuit 1-2 and information receiving circuit 2-2. dr1 R dr2 Voltage U across the terminals dr1 U dr2 The carrier frequencies of information transmission channel I and information transmission channel II are the two series resonant frequencies of a series-parallel resonant circuit, respectively f_i and f_ii. d1 f d2 , satisfying: f d1 <f d <f d2 , where f d This is the center frequency of the channel.

[0062] Compared to existing energy and information synchronization transmission devices with a single information transmission channel, the dual-channel wireless power and information synchronization transmission device based on a series-parallel resonant circuit described in this embodiment constructs two virtual information transmission channels on a single physical channel, doubling the system channel capacity and achieving a doubling of the transmission rate.

[0063] Example 2

[0064] The parameter design method for a dual-channel wireless power and information synchronization transmission device based on a series-parallel resonant circuit provided by this invention employs the following technical solution:

[0065] Step S1: Establish an equivalent circuit model for a bilateral LCC-compensated wireless power and information synchronization transmission device;

[0066] Step S2: Based on the actual load current requirements and the size limitations of the coupling mechanism, design the coupling mechanism parameters and determine the mutual inductance M between the transmitting coil and the receiving coil. ps and load current I L ;

[0067] Step S3: Calculate the transmitter-side compensation inductance L according to Kirchhoff's laws. f1 Receiver-side compensation inductor L f2 The relational model is as follows:

[0068]

[0069] Step S4: Calculate the parallel compensation capacitor C on the transmitting side. f1 Series compensation capacitor C p The relationship between the parameters of the coupling mechanism and the model is as follows:

[0070]

[0071] Step S5: Calculate the parallel compensation capacitor C on the receiving side. f2Series compensation capacitor C s The relationship between the parameters of the coupling mechanism and the model is as follows:

[0072]

[0073] Step S6: Based on the energy carrier frequency f p With maximum information transmission rate v max Determine the center frequency f of information transmission channel I and information transmission channel II. d ,satisfy:

[0074]

[0075] In the formula, f0 is the self-resonant frequency of the energy coil; f p This refers to the energy carrier frequency.

[0076] Step S7: Determine the parallel resonant cavity inductance L dp1 L dp2 ;

[0077] Step S8: Calculate the capacitance C of the parallel resonant cavity. dp1 C dp2 They are respectively:

[0078]

[0079] Step S9: Determine the series resonant cavity inductance L ds1 L ds2 It must meet the following requirements:

[0080]

[0081] In the formula, f d1 with f d2 Let the carrier frequencies of information transmission channel I and information transmission channel II be respectively, satisfying:

[0082]

[0083] Step S10: Calculate the series resonant cavity capacitance C ds1 C ds2 They are respectively:

[0084]

[0085] Step S11: At carrier frequency f d1 Given that the impedance of information transmission channel II is much greater than that of information transmission channel I, information transmission channel II is equivalent to an open circuit. Calculate the equivalent self-inductance L of information transmitting circuit 1-2 and information receiving circuit 1-1. e1 L e2 for:

[0086]

[0087] Step S12: At carrier frequency f d2 Given that the impedance of information transmission channel I is much smaller than that of information transmission channel II, information transmission channel I is equivalent to a short circuit. Calculate the equivalent self-inductance L of information transmitting circuit 2-2 and information receiving circuit 2-1. e3 L e4 They are respectively:

[0088]

[0089] Step S13: Taking into account the self-inductance of coupling transformer TV1 and coupling transformer TV2, calculate the compensation capacitor C for information transmitting circuit 1-2 and information receiving circuit 1-1. e1 C e2 They are respectively:

[0090]

[0091] In the formula, L dt1 L dr11 The self-inductance of the secondary side of the transmitting-side coupling transformer TV1 and the self-inductance of the receiving-side coupling transformer TV2 are for information transmission channel I.

[0092] Step S14: Taking into account the self-inductance of coupling transformer TV3 and coupling transformer TV4, calculate the compensation capacitor C for information transmitting circuit 2-2 and information receiving circuit 2-1. e3 C e4 They are respectively:

[0093]

[0094] In the formula, L dt2 L dr21 The self-inductance of the secondary side of the transmitting-side coupling transformer TV3 in information transmission channel II and the self-inductance of the primary side of the receiving-side coupling transformer TV4 are given.

[0095] Step S15: Calculate the compensation capacitor C for information receiving circuit 1-2 and information receiving circuit 2-2. dr1 C dr2 They are respectively:

[0096]

[0097] In the formula, L dr12 L dr22 The self-inductance of the secondary side of the receiving-side coupling transformer TV2 and the self-inductance of the secondary side of the receiving-side coupling transformer TV4 are given.

[0098] This embodiment describes a parameter design method for a dual-channel wireless power and information synchronization transmission device based on a series-parallel resonant circuit. The parameter configuration does not depend on the mutual inductance between coils, offering greater flexibility. Compared to existing power and information synchronization transmission systems with multiple virtual information transmission channels, the design method provided by this invention decouples parameter design from mutual inductance, increasing design freedom without affecting energy transmission characteristics.

[0099] Table 1 Parameters of Power Information Synchronization Device

[0100]

[0101] The parameters of the power information synchronization system determined using the above transmission devices and design methods are shown in Table 1. The center frequency f of the designed information transmission channel is also shown. d Information transmission channel I carrier frequency f d1 The carrier frequency f of information transmission channel II d2 The frequencies are 2.5MHz, 1.77MHz, and 3.54MHz respectively, with information transmission rates of 250kbps for both information transmission channels I and II. The energy carrier frequency is 85kHz, the load current is 25A, and the DC source voltage U... p It is 110V.

[0102] The load current waveforms under different loads are as follows: Figure 3 As shown in the figure, it can be seen that when the load changes, the load current fluctuation is small, stabilizing at around the design value of 25A. The designed system achieves load-independent constant current output. During energy transmission, the test waveforms of information transmission channel I and information transmission channel II are as follows... Figure 4 As shown, there is almost no interference between the two information transmission channels, the waveform quality on the information receiving side is good, and demodulation is successfully achieved. The information transmission rate of a single information transmission channel is 250kbps. Under the above parameter design, stable transmission of 500kbps information can be achieved simultaneously with power transmission. In summary, the designed device successfully achieves stable synchronous transmission of energy and information under constant current output.

[0103] The above embodiments describe the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from the scope of the principles of the present invention, and all such changes and modifications fall within the protection scope of the present invention.

Claims

1. A dual-channel wireless power and information synchronization transmission device based on a series-parallel resonant circuit, characterized in that... This includes the energy transmitting side, the energy receiving side, information transmission channel I, and information transmission channel II; The information transmission channel I includes information transmitting circuit 1-1, information transmitting circuit 1-2, information receiving circuit 1-1, and information receiving circuit 1-2. The information transmission channel II includes information transmitting circuit 2-1, information transmitting circuit 2-2, and information receiving circuit 2-1 and information receiving circuit 2-2. Information transmitting circuit 1-1 and information transmitting circuit 2-1 have the same structure and parameters, and both use a series-parallel resonant circuit topology. This series-parallel resonant circuit includes a parallel resonant cavity and a series resonant cavity. The parallel resonant cavity of information transmitting circuit 1-1 consists of inductors L connected in parallel. dp1 With capacitor C dp1 Composition, satisfying: The series resonant cavity of information transmission circuit 1-1 consists of inductors L connected in series. ds1 With capacitor C ds1 Composition, satisfying: Where the capacitance C ds1 The other end is connected to inductor L dp1 With capacitor C dp1 The common-line terminals on one side are connected, and the inductor L ds1 The other end is connected to inductor L dp1 With capacitor C dp1 The other side is connected to the collinear terminal; the parallel resonant cavity of the information transmission circuit 2-1 is composed of inductors L connected in parallel. dp2 With capacitor C dp2 Composition, satisfying: The series resonant cavity of information transmission circuit 2-1 consists of inductors L connected in series. ds2 With capacitor C ds2 Composition, satisfying: Where the capacitance C ds2 The other end is connected to inductor L dp2 With capacitor C dp2 The common-line terminals on one side are connected, and the inductor L ds2 The other end is connected to inductor L dp2 With capacitor C dp2 The collinear ends on the other side are connected, above ω d All are channel center angular frequencies; the information transmitting circuit 1-2, information receiving circuit 1-1, information receiving circuit 1-2, information transmitting circuit 2-2, information receiving circuit 2-1, and information receiving circuit 2-2 all adopt a series compensation topology, wherein information transmitting circuit 1-2 and information transmitting circuit 2-2 are respectively loaded on the transmitting coil L p1 Series capacitor C p1 Both ends of the branch and the transmitting coil L p3 Series capacitor C p3 At both ends of the branch, the information transmission circuits 1-2 are connected in series with compensation capacitors C. e1 and inductor L dt1 Composition, inductor L dt1 With inductor L ds1 Mutual inductance, information transmission circuit 2-2 consists of compensation capacitors C connected in series. e3 and inductor L dt2 Composition, inductor L dt2 With inductor L ds2 Mutual inductance; the information receiving circuit 1-2 consists of compensation capacitors C connected in series. dr1 Inductor L dr12 and resistance R dr1 The information receiving circuit 2-2 consists of compensation capacitors C connected in series. dr2 Inductor L dr22 and resistance R dr2 Composition; the information receiving circuit 1-1 and the information receiving circuit 2-1 are respectively loaded onto the receiving coil L s1 Series capacitor C s1 Both ends of the branch and the receiving coil L s3 Series capacitor C s3 At both ends of the branch, the information receiving circuit 1-1 consists of compensation capacitors C connected in series. e2 and inductor L dr11 Composition, inductor L dr11 With inductor L dr12 Mutual inductance, the information receiving circuit 2-1 consists of compensation capacitors C connected in series. e4 and inductor L dr21 Composition, inductor L dr21 With inductor L dr22 Mutual induction; The information receiving voltages of information transmission channel I and information transmission channel II are respectively the series resistor R of information receiving circuit 1-2 and information receiving circuit 2-2. dr1 R dr2 Voltage U across the terminals dr1 U dr2 The carrier frequencies of information transmission channel I and information transmission channel II are the two series resonant frequencies of a series-parallel resonant circuit, respectively f_i and f_ii. d1 f d2 , satisfying: f d1 <f d <f d2 , where f d This is the center frequency of the channel.

2. The dual-channel wireless power and information synchronization transmission device based on a series-parallel resonant circuit according to claim 1, characterized in that: The energy emitting side includes an energy emitting coil L. p Energy emission compensation topology, DC power supply U p and inverter circuit, in which DC power supply U p Connected to the inverter circuit, the energy transmitting coil L p From transmitting coil L p1 Transmitting coil L p2 and transmitting coil L p3 The composition satisfies the following relationship: Where, k p1p2 For transmitting coil L p1 With transmitting coil L p2 The coupling coefficient between them, k p1p3 For transmitting coil L p1 With transmitting coil L p3 The coupling coefficient between them, k p2p3 For transmitting coil L p2 With transmitting coil L p3 The coupling coefficient between them; The energy emission compensation topology includes a compensation inductor L. f1 1. Supplement capacitor C f1 and compensation capacitor C p The compensation capacitor C p Due to the sub-capacitor C p1 Sub-capacitor C p2 Capacitor C p3 Composition, satisfying: 1 / C p1 +1 / C p2 +1 / C p3 =1 / C p , Compensating inductor L f1 One end is connected to the output of the inverter circuit, and the compensation inductor L f1 The other end is connected to the compensation capacitor C. f1 Capacitor C p3 The common-line terminals are connected, and the compensation capacitor C is used. f1 The other end connects to the input terminal of the inverter circuit and the sub-capacitor C. p1 The collinear terminals are connected, and the sub-capacitor C p1 The other end is connected to the transmitting coil L p1 One end is connected to the transmitting coil L. p1 The other end is connected to the sub-capacitor C p2 One end is connected, sub-capacitor C p2 The other end is connected to the transmitting coil L p2 One end is connected to the transmitting coil L. p2 The other end is connected to the transmitting coil L p3 One end is connected to the transmitting coil L. p3 The other end is connected to the sub-capacitor C p3 The other end is connected, above ω p All are energy carrier angular frequencies.

3. The dual-channel wireless power and information synchronization transmission device based on a series-parallel resonant circuit according to claim 1, characterized in that: The receiving side consists of an energy receiving coil L s The system includes an energy receiving compensation topology, a rectifier and filter circuit, and a load, wherein the energy receiving coil L... s By receiving coil L s1 Receiver coil L s2 With receiving coil L s3 The composition satisfies the following relationship: Where, k s1s2 For receiving coil L s1 With receiving coil L s2 The coupling coefficient between them, k s1s3 For receiving coil L s1 With receiving coil L s3 The coupling coefficient between them, k s2s3 For receiving coil L s2 With receiving coil L s3 The coupling coefficient between them, the rectifier filter in the rectifier filter circuit and the load R respectively L Connect it to the compensation capacitor C0; The energy receiving compensation topology includes a compensation inductor L. f2 Compensation capacitor C s and supplementary capacitor C f2 The compensation capacitor C s Due to the sub-capacitor C s1 Sub-capacitor C s2 Capacitor C s3 Composition, satisfying: 1 / C s1 +1 / C s2 +1 / C s3 =1 / C s , Compensating inductor L f2 One end is connected to the input terminal of the rectifier filter, and the compensation inductor L f2 The other end is connected to the compensation capacitor C. f2 Capacitor C s3 The common-line terminals are connected, and the compensation capacitor C is used. f2 The other end connects to the output of the rectifier filter and the sub-capacitor C. s1 The collinear terminals are connected, and the sub-capacitor C s1 The other end is connected to the receiving coil L s1 One end is connected to the receiving coil L. s1 The other end is connected to the sub-capacitor C s2 One end is connected, sub-capacitor C s2 The other end is connected to the receiving coil L s2 One end is connected to the receiving coil L. s2 The other end is connected to the receiving coil L s3 One end is connected to the receiving coil L. s3 The other end is connected to the sub-capacitor C s3 The other end is connected; Both the energy emission compensation topology and the energy reception compensation topology are LCC compensation topologies, with compensation inductors L on both sides. f1 With compensation inductor L f2 Compensation capacitor C f1 With compensation capacitor C f2 Compensation capacitor C p With compensation capacitor C s satisfy:

4. The dual-channel wireless power and information synchronization transmission device based on a series-parallel resonant circuit according to claim 1, characterized in that: The transmitting coil L p1 Transmitting coil L p2 Transmitting coil L p3 Receiver coil L s1 Receiver coil L s2 and receiving coil L s3 All are circular coils, with the transmitting coil L p1 With receiving coil L s1 Parallel relative arrangement, transmitting coil L p2 With receiving coil L s2 Parallel relative arrangement, transmitting coil L p3 With receiving coil L s3 Parallel relative arrangement, transmitting coil L p1 Transmitting coil L p2 and transmitting coil L p3 The receiving coils L are arranged side by side on the same plane. s1 Receiver coil L s2 and receiving coil L s3 They are arranged side by side on the same plane.

5. The parameter design method for the dual-channel wireless power and information synchronization transmission device based on a series-parallel resonant circuit as described in any one of claims 1 to 4, characterized in that... Includes the following steps: Step S1: Establish an equivalent circuit model for a bilateral LCC-compensated wireless power and information synchronization transmission device; Step S2: Calculate the transmitter-side compensation inductance L f1 Receiver-side compensation inductor L f2 The relational model is as follows: In the formula, ω p M is the energy carrier angular frequency; ps For transmitting coil L p With receiving coil L s Mutual intuition between them; I L This is the load current; Step S3: Calculate the parallel compensation capacitor C on the transmitting side. f1 Series compensation capacitor C p The relationship between the parameters of the coupling mechanism and the model is as follows: Step S4: Calculate the parallel compensation capacitor C on the receiving side. f2 Series compensation capacitor C s The relationship between the parameters of the coupling mechanism and the model is as follows: Step S5: Determine the center frequency f of information transmission channel I and information transmission channel II. d ,satisfy: In the formula, v max f is the maximum information transmission rate of the channel, f0 is the self-resonant frequency of the energy coil, and f p For energy carrier frequency; Step S6: Determine the parallel resonant cavity inductance L dp1 L dp2 ; Step S7: Calculate the capacitance C of the parallel resonant cavity. dp1 C dp2 They are respectively: Step S8: Determine that the series resonant cavity is composed of inductor L ds1 L ds2 It must meet the following requirements: in Step S9: Calculate the series resonant cavity capacitance C ds1 C ds2 They are respectively: Step S7: Calculate the equivalent self-inductance L of information transmitting circuit 1-2 and information receiving circuit 1-1. e1 L e2 They are respectively: Step S8: Calculate the equivalent self-inductance L of the information transmitting circuit 2-2 and the information receiving circuit 2-1. e3 L e4 They are respectively: Step S9: Calculate the compensation capacitor C for information transmitting circuit 1-2 and information receiving circuit 1-1. e1 C e2 They are respectively: In the formula, L dt1 L dr11 The self-inductance of the secondary side of the transmitting-side coupling transformer TV1 and the primary side self-inductance of the receiving-side coupling transformer TV2 are for information transmission channel I. Step S10: Calculate the compensation capacitor C for information transmitting circuit 2-2 and information receiving circuit 2-1. e3 C e4 They are respectively: In the formula, L dt2 L dr21 The self-inductance of the secondary side of the transmitting-side coupling transformer TV3 in information transmission channel II, and the self-inductance of the primary side of the receiving-side coupling transformer TV4; Step S11: Calculate the compensation capacitor C for information receiving circuit 1-2 and information receiving circuit 2-2. dr1 C dr2 They are respectively: In the formula, L dr12 L dr22 The self-inductance of the secondary side of the receiving-side coupling transformer TV2 and the self-inductance of the secondary side of the receiving-side coupling transformer TV4 are given.

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