Wireless charging system with position detection function, and position adjustment method therefor

Abstract

Provided are a wireless charging system with a position detection function, and a position adjustment method therefor. The system comprises an energy transmission assembly and a signal transmission assembly, wherein the energy transmission assembly comprises a power transmitting coil, a power receiving coil and a magnetically integrated resonant coil; the signal transmission assembly comprises a signal transmitting coil and a signal receiving coil; the power transmitting coil, the magnetically integrated resonant coil and the signal transmitting coil are stacked in sequence, and the power receiving coil and the signal receiving coil are stacked; and during position detection, the magnetically integrated resonant coil and the signal receiving coil are used as measurement coils to measure positional deviations of an X axis and a Y axis, respectively. Simultaneous position detection in two directions is realized; and by means of coil reuse, the complexity of the system is reduced, and the utilization rate of the coils is improved.

Description

Wireless charging system with position detection function and its position adjustment method Technical Field

[0001] This invention relates to the field of wireless charging, and in particular to a wireless charging system with position detection function and its position adjustment method. Background Technology

[0002] The position detection problem of EV-WPT receivers in wireless charging systems for electric vehicles has been extensively studied both domestically and internationally, yielding numerous research results. Based on different detection methods, it can be broadly categorized into non-magnetic field induction and magnetic field induction methods. Non-magnetic field induction methods include cameras, RFID, UWB, and WIFI, but WIFI and UWB positioning technologies have relatively low alignment accuracy, generally above 10cm. Camera and RFID positioning technologies can achieve centimeter-level alignment accuracy, but camera positioning is significantly affected by adverse weather conditions, and both technologies are costly and only locate the vehicle relative to a marker, failing to determine the alignment of the primary and secondary magnetic coupling mechanisms. Magnetic field induction methods identify changes in receiver position by sensing changes in the magnetic field through a detection coil. There are two different forms of detection coils: one is a separately designed detection coil that does not interfere with the coils of the system coupling mechanism; the other reuses the coils of the system coupling mechanism as the detection coil.

[0003] In EV-WPT systems, magnetic field induction technology is required to detect the receiver's position to better ensure power and efficiency. Existing research on receiver position detection methods includes using four detection coils symmetrically placed at the four corners of the coupling mechanism; using orthogonal coils surrounding the transmitter coupling mechanism to determine receiver alignment; employing time-division multiplexing to detect the receiver coil's position during the alignment phase using the transmitter coil; and using compensation coils through topology switching to determine receiver alignment during the alignment phase. However, existing position detection methods using detection coils alone increase system cost and complexity, while using coils from the coupling mechanism as detection coils suffers from limitations such as only being able to detect a single direction or having low accuracy. Technical issues

[0004] To address the issue that using a detection coil alone in existing position detection methods increases system cost and complexity, while using a coil from a multiplexed coupling mechanism as a detection coil results in either being limited to detecting only a single direction or having low accuracy. Technical solutions

[0005] A wireless charging system with location detection function includes an energy transmission component and a signal transmission component. The energy transmission component includes a power transmitting coil, a power receiving coil, and a magnetic integrated resonant coil. The signal transmission component includes a signal transmitting coil and a signal receiving coil.

[0006] The power transmitting coil, the magnetic integrated resonant coil, and the signal transmitting coil are stacked in sequence, and the power receiving coil and the signal receiving coil are stacked in sequence. During position detection, the magnetic integrated resonant coil and the signal receiving coil act as detection coils to detect the position offset of the X-axis and Y-axis, respectively.

[0007] Optionally, both the power transmitting coil and the power receiving coil are Q-type coils;

[0008] Both the signal transmitting coil and the signal receiving coil are DD-type coils symmetrical along the X-axis, and the magnetic integrated resonant coil is a DD-type coil symmetrical along the Y-axis.

[0009] Optionally, the energy transmission component further includes a transmitting end transmission circuit and a receiving end transmission circuit;

[0010] The transmitting circuit includes a DC power supply, an inverter circuit, and a primary-side compensation circuit connected in sequence, with the output of the primary-side compensation circuit connected to the power transmitting coil.

[0011] The receiving end transmission circuit includes a secondary-side compensation circuit and a rectifier filter circuit connected in sequence. The input terminal of the secondary-side compensation circuit is connected to the power receiving coil, and the output terminal of the rectifier filter circuit is connected to the load.

[0012] Optionally, the primary-side compensation circuit and the secondary-side compensation circuit constitute an LCC-S resonant compensation network.

[0013] Optionally, the transmitting circuit further includes a single-pole double-throw switch S for controlling the connection or disconnection between the magnetic integrated resonant coil and the primary-side compensation circuit;

[0014] The input terminal of the single-pole double-throw switch S is connected to one output terminal of the inverter circuit. One control terminal A of the single-pole double-throw switch S is connected to one end of the magnetic integrated resonant coil. The other control terminal B of the single-pole double-throw switch S and the other end of the magnetic integrated resonant coil are both connected to one input terminal of the primary-side compensation circuit.

[0015] Optionally, during position detection, the input terminal S of the single-pole double-throw switch is connected to the control terminal B, and the magnetic integrated resonant coil is not connected to the primary-side compensation circuit.

[0016] During wireless charging, the input terminal S of the single-pole double-throw switch is connected to the control terminal A, and the magnetic integrated resonant coil is connected to the primary-side compensation circuit.

[0017] Optionally, the signal transmission component further includes a signal modulation circuit and a signal modulation and acquisition circuit;

[0018] The output terminal of the signal modulation circuit is connected to the signal transmitting coil, and the input terminal of the signal modulation and acquisition circuit is connected to the signal receiving coil.

[0019] A method for adjusting the position of a wireless charging system with position detection function, used to adjust the position of the receiver of the aforementioned wireless charging system with position detection function, comprising the following steps:

[0020] S1: The input terminal S of the single-pole double-throw switch is connected to the control terminal B;

[0021] S2: Collect the induced voltage of the signal receiving coil, determine whether there is a shift in the Y-axis direction, and adjust the position of the receiving end in the Y-axis direction;

[0022] S3: Collect the induced voltage of the magnetic integrated resonant coil and the phase difference with the inverter output voltage, determine whether there is a shift in the X-axis direction, and adjust the position of the receiver in the X-axis direction.

[0023] Optionally, the specific method for adjusting the position of the receiving end in the Y-axis direction in step S2 is as follows:

[0024] If the induced voltage of the signal receiving coil is greater than 0, it is determined that there is a deviation in the Y-axis direction of the receiving end. The position of the receiving end in the Y-axis direction is adjusted, and the induced voltage of the signal receiving coil is collected in real time until the induced voltage of the signal receiving coil is equal to 0V. Then the Y-axis correction is completed.

[0025] Optionally, the specific method for adjusting the position of the receiving end in the X-axis direction in step S3 is as follows:

[0026] If the induced voltage of the magnetic integrated resonant coil is greater than 0V, it is determined that the receiving end is offset in the X-axis direction, and the offset direction is determined according to the phase difference.

[0027] Based on the offset direction, adjust the position of the receiver in the X direction and collect the induced voltage of the magnetic integrated resonant coil in real time until the induced voltage of the magnetic integrated resonant coil is equal to 0V, then the X-axis correction is completed. Beneficial effects

[0028] 1. In the position detection stage, the magnetic integrated resonant coil and the signal receiving coil are reused to detect the alignment status of the receiving end on the X and Y axes, thus realizing the detection of position in two directions. The reuse of the coil reduces the complexity of the system and improves the utilization rate of the coil.

[0029] 2. This application identifies whether there is a shift on the X and Y axes by collecting the induced voltage of the magnetic integrated resonant coil and the signal receiving coil, identifies the shift direction on the X axis based on the phase difference, and adjusts the position of the receiving end based on the identification result, resulting in high alignment accuracy of the receiving end. Attached Figure Description

[0030] Figure 1 is an equivalent circuit diagram of the wireless charging system with position detection function of the present invention.

[0031] Figure 2 is an exploded view of the coupling mechanism of the wireless charging system with position detection function of the present invention.

[0032] Figure 3 is a structural diagram of the coupling mechanism of the wireless charging system with position detection function of the present invention.

[0033] Figure 4 shows the equivalent circuit model of the system during the wireless charging process of the present invention.

[0034] Figure 5 shows the misalignment diagram of the receiving coil along the positive Y-axis in the simulation of this invention.

[0035] Figure 6 is a vector diagram of the inverter voltage and the induced voltage of the magnetic integrated resonant coil in the system of the present invention.

[0036] Figure 7 shows the equivalent circuit model of the system during the position detection process of the present invention.

[0037] Figure 8 shows the variation of the induced voltage of the signal receiving coil with ΔY and the variation of the induced voltage of the magnetic integrated resonant coil with ΔX.

[0038] Figure 9 shows the variation of the induced voltage of the signal receiving coil of the present invention with ΔY.

[0039] Figure 10 shows the variation of the induced voltage of the magnetic integrated resonant coil of the present invention with ΔX.

[0040] Figure 11 is a comparison diagram of the phase difference between the inverter output voltage and the induced voltage of the magnetic integrated resonant coil in the system simulation of the present invention.

[0041] Figure 12 shows the output voltage and current waveforms of the inverter in the system simulation of this invention.

[0042] Figure 13 shows the effect of signal transmission rate and transmission accuracy in the system simulation of the present invention.

[0043] In the picture: L PFor power transmitting coil; L S For power receiving coil; L f1 It is a magnetically integrated resonant coil; L DP For signal transmitting coil; L DS This is a signal receiving coil. The best embodiment of the present invention

[0044] As shown in Figure 1, a wireless charging system with location detection function includes an energy transmission component and a separate signal transmission component.

[0045] The energy transmission component includes a transmitting circuit and a receiving circuit. The transmitting circuit includes a DC power supply U connected in sequence. DC The inverter circuit and the primary-side compensation circuit are connected. The output of the primary-side compensation circuit is connected to the power transmitting coil L. P connect;

[0046] The receiving end transmission circuit includes a secondary-side compensation circuit and a rectifier filter circuit connected in sequence. The input terminal of the secondary-side compensation circuit is connected to the power receiving coil L. S The output terminal of the rectifier filter circuit is connected to the load R. L connect.

[0047] In this embodiment, the inverter circuit is a full-bridge inverter composed of Q1-Q4, and the rectifier filter circuit includes four diodes D1-D4 and a filter capacitor C. d The rectifier is constructed from these components.

[0048] As shown in Figure 1, the signal transmission component further includes a signal modulation circuit and a signal modulation and acquisition circuit. The output terminal of the signal modulation circuit is connected to the signal transmitting coil L. DP Connect the input terminal of the signal conditioning and acquisition circuit to the signal receiving coil L. DS connect.

[0049] As shown in Figure 1, it also includes a magnetic integrated resonant coil L. f1 The power transmitting coil L P Magnetic integrated resonant coil L f1 and signal transmitting coil L DP The power receiving coil L is arranged in a stacked manner with its center points aligned. S and signal receiving coil L DS The coils are stacked and aligned at their center points. Therefore, the coils at the transmitting and receiving ends are decoupled from each other.

[0050] As shown in Figures 2 and 3, in order to eliminate the coupling between the power coil, the magnetic integrated resonant coil, and the signal coil, and reduce the complexity of the system, the power transmitting coil L... P and power receiving coil LS All are Q-type coils, and the signal transmitting coil L DP and signal receiving coil L DS All are selected as DD-type coils symmetrical along the X-axis, and the magnetic integrated resonant coil L f1 Choose a DD-type coil that is symmetrical along the Y-axis.

[0051] In this embodiment, when the electric vehicle enters the parking space, the receiver position offset is decomposed into two variables, ΔX and ΔY. To achieve a lightweight receiver coupling mechanism and reduce system complexity, the magnetic integrated resonant coil L is used. f1 and signal receiving coil L DS The detection coils are used to detect the positional offsets of the X and Y axes, respectively.

[0052] As shown in Figure 1, in order to better meet the requirements of lightweight receiver devices, the primary-side compensation circuit and the secondary-side compensation circuit often adopt LCC-S resonant compensation network.

[0053] In this embodiment, as shown in FIG1, the primary-side compensation circuit includes a primary-side compensation inductor L. f2 Primary-side compensation capacitor C f and primary-side compensation capacitor C p The primary-side compensating inductor L f2 One end of the primary-side compensation inductor L is connected to one output terminal of the inverter circuit. f2 The other end is connected to the primary-side compensation capacitor C f One end is connected to the power transmitting coil L P One end is connected; the primary-side compensation capacitor C p One end is connected to the power transmitting coil L P The other end is connected to the primary-side compensation capacitor C. p The other end is connected to the primary-side compensation capacitor C f The other end is connected.

[0054] In this embodiment, as shown in FIG1, the secondary-side compensation circuit includes a secondary-side compensation capacitor C. s Secondary side compensation capacitor C s One end is connected to the power receiving coil L S Connection, secondary side compensation capacitor C s The other output terminal is connected to one output terminal of the rectifier filter circuit.

[0055] As shown in Figure 1, the transmitting circuit also includes controls for the magnetic integrated resonant coil L. f1 A single-pole double-throw switch that is connected to or disconnected from the primary-side compensation circuit;

[0056] The input terminal S of the single-pole double-throw switch is connected to one output terminal of the inverter circuit, and one control terminal A of the single-pole double-throw switch is connected to the magnetic integrated resonant coil L. f1 One end is connected to the other control terminal B of the single-pole double-throw switch and the magnetic integrated resonant coil L. f1 The other end of each circuit is connected to one input terminal of the primary-side compensation circuit.

[0057] In this embodiment, in order to achieve impedance balance of the compensation network and avoid large current surges damaging the system during the position detection phase, the compensation inductor L... f It consists of two compensation inductors connected in series, where L f1 For the magnetically integrated resonant coil, it is magnetically integrated in the transmitter coupling mechanism, L f2 A separate compensation inductor is installed in the inverter box. During position detection, the input terminal S of the single-pole double-throw switch is connected to the control terminal B, and the magnetic integrated resonant coil L... f1 and signal receiving coil L DS The detection coils detect the positional offsets along the X and Y axes respectively. Once the receiver and transmitter are aligned, the system enters the charging phase, and the input terminal S is connected to the control terminal A, initiating high-power charging. The equivalent circuit model of the EV-WPT system during the charging phase is shown in Figure 4.

[0058] In this embodiment, when the system is in a resonant state, the expression for the system angular frequency ω is:

[0059]

[0060] Right now:

[0061]

[0062] Based on Kirchhoff's voltage law, derive the following KVL equations for the system:

[0063]

[0064] Considering the actual situation of magnetic integrated resonant coils

[0065] L f1 internal resistance R Lf Power transmitting coil L P internal resistance R P and the internal resistance R of the power receiving coil S Typically a few mΩ, much smaller than the load resistance R. L Therefore, the influence of the coil's internal resistance is ignored in the theoretical analysis, simplifying the analysis of the system's input and output voltage, current, and output power characteristics. The solution yields:

[0066]

[0067] When the system coupling mechanism is aligned in an ideal situation, M pf =0uH and M Sf =0uH simplifies the above equation to:

[0068]

[0069] The system's output voltage, output power, and efficiency are obtained as follows:

[0070]

[0071] It can be seen that by selecting the shapes of the magnetic integrated resonant coil and the power coil, the design difficulty of the system can be simplified, thereby achieving the constant current input and constant voltage output characteristics of the conventional LCC-S resonant compensation network.

[0072] A method for adjusting the position of a wireless charging system with position detection function is provided, for adjusting the position of the receiver of the wireless charging system with position detection function described in Embodiment 1. The specific steps are as follows:

[0073] S1: The input terminal S of the single-pole double-throw switch is connected to the control terminal B;

[0074] S2: Signal receiving coil L DS The induced voltage, if the signal receiving coil L DS If the induced voltage is greater than 0, it is determined that there is a misalignment of the receiving end in the Y-axis direction. The position of the receiving end in the Y-axis direction is adjusted, and the signal receiving coil L is sampled in real time. DS The induced voltage until the signal receiving coil L DS When the induced voltage is 0V, the Y-axis correction is complete.

[0075] S3: Acquiring data from the integrated magnetic resonant coil L f1 The induced voltage and its phase difference with the inverter output voltage, if the magnetic integrated resonant coil L f1 When the induced voltage is greater than 0V, it is determined that the receiver is offset in the X-axis direction, and the offset direction is determined based on the phase difference.

[0076] Based on the offset direction, adjust the position of the receiver in the X direction and acquire the data of the magnetic integrated resonant coil L in real time. f1 The induced voltage, until the magnetic integrated resonant coil L f1 When the induced voltage is 0V, the X-axis correction is complete.

[0077] In this embodiment, the magnetic integrated resonant coil L f1 and signal receiving coil L DS Both are DD type coils, and the position detection principle is the same, with signal receiving coil L. DSFor example, a schematic diagram of the receiving end coupling mechanism offset along the positive Y-axis is shown in Figure 5. The mutual inductance between the Q-type coil and the DD-type coil can be expressed as:

[0078]

[0079] Solving this problem yields the magnitudes of the currents in each energy transfer channel:

[0080]

[0081] In the formula:

[0082]

[0083] When the X-axis and Y-axis are offset, M sf and M PDS The value is much greater than M fDS This allows us to determine the primary and secondary factors determining the current change. Signal receiving coil L DS The induced voltage and magnetic integrated resonant coil L f1 The induced voltage in the detection coil circuit can be expressed as:

[0084]

[0085] The induced voltage of the detection coil is further obtained as follows:

[0086]

[0087] The signal receiving coil L can be obtained from the above formula. DS With the changing trend of ΔY, the magnetic integrated resonant coil L f1 The trend of the induced voltage with ΔX is shown in Figure 8. When the receiver is misaligned, the induced voltage of the detection coil is greater than 0V, and the inverter output voltage and the magnetic integrated resonant coil L are sampled simultaneously. f1 The direction of X-axis offset can be determined by calculating the phase difference of the induced voltage.

[0088] S4: System Simulation and Verification. To verify the stability and feasibility of the designed system, an EV-WPT system prototype was built, and its circuit structure is shown in Figure 1. The parameters of the system prototype are shown in Table 1, where phase is P and amplitude is A.

[0089] Table 1 Data collection at 6 test points

[0090]

[0091] Verification of S4.1 receiver position detection:

[0092] The magnetic integrated resonant coil L was verified at a rated transmission distance of 16cm. f1and signal receiving coil L DS The ability to detect positional offset at the receiving end.

[0093] First, the signal receiving coil L DS The offset in the Y-axis direction is detected by the sampling signal received by the acquisition circuit and coil L. DS The induced voltage is rectified to obtain the voltage value. The change of the induced voltage with the Y-axis offset is shown in Figure 9. The judgment threshold is set to 0.5V. Under the set judgment threshold, the maximum offset of the Y-axis is 2cm, which can be used to determine that the Y-axis direction correction of the receiving end coupling mechanism is completed.

[0094] Next, the magnetic integrated resonant coil L f1 Verification is performed by detecting the X-axis offset, and the magnetic integrated resonant coil L is sampled using a sampling circuit. f1 The induced voltage is rectified to obtain the voltage value. The change of the induced voltage with the X-axis offset is shown in Figure 10. The judgment threshold is set to 0.5V. Under the set judgment threshold, the maximum X-axis offset is 1.5cm, which can be used to determine that the X-axis direction correction of the receiving end coupling mechanism is completed.

[0095] Sampling inverter output voltage and magnetic integrated resonant coil L f1 The induced voltages are compared, the phase difference is calculated, and the X-axis offset direction is determined. The phase difference comparison is shown in Figure 11. When Δx>0, the magnetic integrated resonant coil L... f1 The induced voltage phase leads the inverter output voltage. When Δx < 0, the magnetic integrated resonant coil L... f1 The induced voltage phase lags behind the inverter output voltage. At different offset positions, the magnetic integrated resonant coil L... f1 The amplitude of the induced voltage changes, but the phase difference with the inverter output voltage can still clearly reflect the offset direction of the X-axis. Figure 11(a) shows (Δx, Δy) = (100, 0), Figure 11(b) shows (Δx, Δy) = (-100, 0), Figure 11(c) shows (Δx, Δy) = (150, 100), and Figure 11(d) shows (-150, 100).

[0096] Verification of the S4.2 system during the charging phase:

[0097] A test was conducted on the 11kW high-power charging stage of the static wireless charging system for electric vehicles. The test conditions were: primary and secondary coupling mechanisms aligned, transmission distance 16cm, DC input voltage controlled by the charger at 700V, and inverter output voltage and current waveforms observed as shown in Figure 12. The current waveform slightly lags behind the voltage waveform, exhibiting weak inductive properties, which helps reduce switching losses and ensures long-term inverter operation. The inverter output voltage was 700V, and the inverter output current was 20.5A.

[0098] The system output power and transmission efficiency are sampled and calculated using a power analyzer, and the DC input voltage U is obtained through simulation. dc1 The voltage is 698.3V, and the DC input current is I. dc1 The output voltage at the load terminal is 16.5A, U. dc2 The voltage is 412.6 V, and the carrier-end output current I is... dc2 The system has an A rating of 26.5A, a DC input power P1 of 11.54kW, a system output power P2 of 10.92kW, and a system DC-DC transmission efficiency η1 of 94.6%.

[0099] The communication transmission rate can be verified by sending a shared folder from the signal transmitter to the signal receiver and observing the file transfer speed on the computer. The accuracy of the data transmission can be verified by observing the IP address of the transmitter and the content of the source file. As shown in Figure 13, the signal transmission coil achieves a transmission rate of 3.1 MB / s, approximately 24.8 Mbps, when the primary and secondary coupling mechanisms are aligned.

[0100] In summary, simulation results of this application demonstrate that the receiver position detection method achieves Y-axis offset detection within the range of [-200mm, 200mm] and X-axis offset detection within the range of [-150mm, 150mm]. The sampling magnetic integrated resonant coil L... f1 The X-axis offset direction can be determined by sensing the voltage and inverter output voltage and detecting the phase difference, achieving a large detection range and high alignment accuracy. High-power charging tests were conducted on the system at a rated transmission distance of 16cm, achieving an output power of 10.92kW and a DC-DC transmission efficiency of 94.6%. Furthermore, the designed separate signal transmission component achieves a communication speed of 24.8Mbps when the coupling mechanisms at the receiving and transmitting ends are aligned.

Claims

1. A wireless charging system with location detection function, characterized in that, It includes an energy transmission component and a signal transmission component. The energy transmission component includes a power transmitting coil, a power receiving coil, and a magnetically integrated resonant coil. The signal transmission component includes a signal transmitting coil and a signal receiving coil. The power transmitting coil, the magnetic integrated resonant coil, and the signal transmitting coil are stacked in sequence, and the power receiving coil and the signal receiving coil are stacked in sequence. During position detection, the magnetic integrated resonant coil and the signal receiving coil act as detection coils to detect the position offset of the X-axis and Y-axis, respectively.

2. The wireless charging system with position detection function according to claim 1, characterized in that, Both the power transmitting coil and the power receiving coil are Q-type coils; Both the signal transmitting coil and the signal receiving coil are DD-type coils symmetrical along the X-axis, and the magnetic integrated resonant coil is a DD-type coil symmetrical along the Y-axis.

3. The wireless charging system with position detection function according to claim 1, characterized in that, The energy transmission component also includes a transmitter transmission circuit and a receiver transmission circuit; The transmitting circuit includes a DC power supply, an inverter circuit, and a primary-side compensation circuit connected in sequence. The output of the primary-side compensation circuit is connected to the power transmitting coil. The receiving end transmission circuit includes a secondary-side compensation circuit and a rectifier filter circuit connected in sequence. The input terminal of the secondary-side compensation circuit is connected to the power receiving coil, and the output terminal of the rectifier filter circuit is connected to the load.

4. A wireless charging system with position detection function according to claim 3, characterized in that, The primary-side compensation circuit and the secondary-side compensation circuit constitute an LCC-S resonant compensation network.

5. A wireless charging system with position detection function according to claim 4, characterized in that, The transmitting circuit also includes a single-pole double-throw switch S for controlling the connection or disconnection of the magnetic integrated resonant coil and the primary-side compensation circuit; The input terminal of the single-pole double-throw switch S is connected to one output terminal of the inverter circuit. One control terminal A of the single-pole double-throw switch S is connected to one end of the magnetic integrated resonant coil. The other control terminal B of the single-pole double-throw switch S and the other end of the magnetic integrated resonant coil are both connected to one input terminal of the primary-side compensation circuit.

6. A wireless charging system with position detection function according to claim 5, characterized in that, During position detection, the input terminal S of the single-pole double-throw switch is connected to the control terminal B, and the magnetic integrated resonant coil is not connected to the primary side compensation circuit. During wireless charging, the input terminal S of the single-pole double-throw switch is connected to the control terminal A, and the magnetic integrated resonant coil is connected to the primary-side compensation circuit.

7. A wireless charging system with position detection function according to claim 1, characterized in that, The signal transmission component also includes a signal modulation circuit and a signal modulation and acquisition circuit; The output terminal of the signal modulation circuit is connected to the signal transmitting coil, and the input terminal of the signal modulation and acquisition circuit is connected to the signal receiving coil.

8. A method for adjusting the position of a wireless charging system with position detection function, characterized in that, The specific steps for adjusting the position of the receiver of the wireless charging system with position detection function according to any one of claims 1-7 are as follows: S1: The input terminal S of the single-pole double-throw switch is connected to the control terminal B; S2: Collect the induced voltage of the signal receiving coil, determine whether there is a shift in the Y-axis direction, and adjust the position of the receiving end in the Y-axis direction; S3: Collect the induced voltage of the magnetic integrated resonant coil and the phase difference with the inverter output voltage, determine whether there is a shift in the X-axis direction, and adjust the position of the receiver in the X-axis direction.

9. A method for adjusting the position of a wireless charging system with position detection function according to claim 8, characterized in that, The specific method for adjusting the position of the receiving end in the Y-axis direction in step S2 is as follows: If the induced voltage of the signal receiving coil is greater than 0, it is determined that there is a deviation in the Y-axis direction of the receiving end. The position of the receiving end in the Y-axis direction is adjusted, and the induced voltage of the signal receiving coil is collected in real time until the induced voltage of the signal receiving coil is equal to 0V. Then the Y-axis correction is completed.

10. A method for adjusting the position of a wireless charging system with position detection function according to claim 8, characterized in that, The specific method for adjusting the position of the receiving end in the X-axis direction in step S3 is as follows: If the induced voltage of the magnetic integrated resonant coil is greater than 0V, it is determined that the receiving end is offset in the X-axis direction, and the offset direction is determined according to the phase difference. Based on the offset direction, adjust the position of the receiver in the X direction and collect the induced voltage of the magnetic integrated resonant coil in real time until the induced voltage of the magnetic integrated resonant coil is equal to 0V, then the X-axis correction is completed.

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