Self-adaptive percutaneous wireless energy transmission system

Abstract

The utility model relates to a self-adaptive percutaneous wireless energy transmission system, and the system is characterized in that a transmitting end phase detection unit is connected with a resonant transmitting coil, and is used for detecting the phase difference between voltage and current in the resonant transmitting coil, and transmitting the phase difference to a transmitting end main control module; the transmitting end main control module is used for sending a first control signal to the first adjustable resonant capacitor array based on the phase difference so as to adjust the capacitance value of the capacitor array; the receiving end phase detection unit is connected with the resonance receiving coil and is used for detecting the phase difference of voltage and current in the resonance receiving coil and sending the phase difference to the receiving end main control module; the receiving end main control module is used for sending a second control signal to the second adjustable resonant capacitor array based on the phase difference so as to adjust the capacitance value of the capacitor array, and the consistency of in-vitro and in-vivo resonant points is sought by adjusting the adjustable resonant capacitor array, so that the optimization of in-vitro and in-vivo percutaneous wireless energy transmission is achieved.

Description

Technical Field

[0001] This application relates to the technical field of wireless energy transmission, and particularly to an adaptive percutaneous wireless energy transmission system. Background Art

[0002] After a medical device is implanted into the human body, most of them are battery-powered. Using a rechargeable battery as the power source for an implantable device is the future development trend.

[0003] Currently, to transmit electrical energy from outside the body to inside the body, there are methods using resonant coils in a magnetic coupling manner, methods using high-frequency electromagnetic waves, and methods using light radiation. However, considering safety, using resonant coils in a magnetic coupling manner for energy transmission between the outside and inside of the body is the safest and has the highest efficiency.

[0004] However, when transmitting energy from outside the body to the battery of an implant through a certain implantation depth in a magnetic coupling manner, it needs to pass through human tissues such as the skin and muscles in the middle. The magnetic field strength will be attenuated, and the resonant frequency of the coil will have a large deviation, thereby affecting the energy transmission efficiency, and the heat generation of the transmission component will also increase.

[0005] To reduce the attenuation of the alternating magnetic field by human tissues, improve the transmission efficiency, and take into account the coil size and related circuits, the selection of the resonant frequency is very important. Human tissues will cause the deviation of the coil resonant frequency. To improve the transmission efficiency, it is necessary to correct the resonant frequency or adjust it to an optimal performance point. However, the actual application scenarios are the body surface and inside of the human body, and it is relatively difficult to adjust the resonant frequency. Therefore, it is necessary to provide an adaptive percutaneous wireless energy transmission system that can automatically find the optimal transmission performance. Summary of the Utility Model

[0006] Based on this, it is necessary to provide an adaptive percutaneous wireless energy transmission system for the above technical problems.

[0007] In a first aspect, an embodiment of this application provides an adaptive percutaneous wireless energy transmission system, including an external energy transmitting device and an internal energy receiving device:

[0008] The external energy transmitting device includes a power supply module, a resonant transmitting coil, a first adjustable resonant capacitor array, a transmitting end phase detection unit, and a transmitting end main control module; wherein:

[0009] The output end of the power amplifier of the power supply module is connected to the resonant transmitting coil, and is used to provide energy to the resonant transmitting coil;

[0010] The transmitting - end phase - detection unit is connected to the resonant transmitting coil, and is used to detect the phase difference between the voltage and current in the resonant transmitting coil, and send the phase difference to the transmitting - end main control module;

[0011] The transmitting - end main control module is used to send a first control signal to the first adjustable resonant capacitor array based on the phase difference to adjust the capacitance value of the capacitor array;

[0012] The in - vivo energy receiving device includes a resonant receiving coil, a second adjustable resonant capacitor array, a receiving - end phase - detection unit, and a receiving - end main control module; where:

[0013] The receiving - end phase - detection unit is connected to the resonant receiving coil, and is used to detect the phase difference between the voltage and current in the resonant receiving coil, and send the phase difference to the receiving - end main control module;

[0014] The receiving - end main control module is used to send a second control signal to the second adjustable resonant capacitor array based on the phase difference to adjust the capacitance value of the capacitor array.

[0015] In one embodiment, the extracorporeal energy - transmitting device further includes a transmitting - end DC - power - supply detection unit, and the in - vivo energy - receiving device further includes an AC - DC rectification circuit and a receiving - end DC - input - power detection unit.

[0016] The transmitting - end DC - power - supply detection unit is connected to the output end of the power - supply module, and is used to detect the power supply power of the transmitting end;

[0017] The AC - DC rectification circuit is connected to the resonant receiving coil, and is used to convert alternating current into direct current;

[0018] The receiving - end DC - input - power detection unit is connected to the AC - DC rectification circuit, and is used to detect the input power of the receiving end;

[0019] The transmitting - end main control module is further used to send a first control signal to the first adjustable resonant capacitor array based on the ratio of the input power of the receiving end to the power supply power of the transmitting end to adjust the capacitance value of the capacitor array;

[0020] The receiving - end main control module is further used to send a second control signal to the second adjustable resonant capacitor array based on the ratio of the input power of the receiving end to the power supply power of the transmitting end to adjust the capacitance value of the capacitor array.

[0021] In one embodiment, the first adjustable resonant capacitor array has the same structure as the second adjustable resonant capacitor array. The first adjustable resonant capacitor array includes:

[0022] Main resonance capacitor; the main resonance capacitor is connected in series with the resonance emission coil;

[0023] Multiple switch capacitor circuits; wherein each switch capacitor circuit includes a first resonance capacitor, a second resonance capacitor, a first switching transistor, and a second switching transistor. The first resonance capacitor is connected to the first switching transistor, and the second resonance capacitor is connected to the second switching transistor.

[0024] In one embodiment, the first switching transistor is a first MOSFET, and the second switching transistor is a second MOSFET.

[0025] The gates of the first MOSFET and the second MOSFET are connected to a first control signal.

[0026] The drain of the first MOSFET is connected to the first resonance capacitor; the drain of the second MOSFET is connected to the second resonance capacitor.

[0027] The sources of the first MOSFET and the second MOSFET are connected to a common ground.

[0028] In one embodiment, both the extracorporeal energy emission device and the intracorporeal energy reception device include an isolated low-voltage power supply unit and an isolated control signal generation unit. The first adjustable resonance capacitor array and the second adjustable resonance capacitor array have the same structure. The first adjustable resonance capacitor array includes:

[0029] Multiple switch capacitor circuits connected in parallel;

[0030] Wherein each switch capacitor circuit includes a first capacitor, a first switching transistor, and a second switching transistor. The first capacitor, the first switching transistor, and the second switching transistor are connected in sequence.

[0031] The isolated control signal generation unit is connected to the first adjustable resonance capacitor array for isolating the first control signal and sending an isolated control signal to the first adjustable resonance capacitor array to adjust the capacitance value of the capacitor array.

[0032] The isolated low-voltage power supply unit is connected to the isolated control signal generation unit for providing isolated electrical energy.

[0033] In one embodiment, the first switching transistor is a first gallium nitride MOS transistor, and the second switching transistor is a second gallium nitride MOS transistor.

[0034] The drain of the first gallium nitride MOS transistor is connected to the first capacitor.

[0035] The gate of the first gallium nitride MOS transistor is connected to the gate of the second gallium nitride MOS transistor;

[0036] The source of the first gallium nitride MOS transistor is connected to the source of the second gallium nitride MOS transistor;

[0037] The source of the second gallium nitride MOS transistor is connected to the common ground.

[0038] In one embodiment, the power supply module includes:

[0039] A high-voltage power supply, which is connected to the transmitting end main control module, and the transmitting end main control module is further used to adjust the voltage and power output by the high-voltage power supply;

[0040] A power amplifier connected to the high-voltage power supply, which is used to convert the DC power supply into a high-frequency signal and amplify the output AC power when the power supply increases.

[0041] In one embodiment, the extracorporeal energy transmitting device further includes a transmitting end modulation and demodulation circuit, and the in-vivo energy receiving device further includes a receiving end modulation and demodulation circuit.

[0042] One end of the transmitting end modulation and demodulation circuit is connected to the transmitting end main control module, and the other end is connected to the resonant transmitting coil, which is used for wireless communication between the transmitting end main control module and the resonant transmitting coil;

[0043] One end of the receiving end modulation and demodulation circuit is connected to the receiving end main control module, and the other end is connected to the resonant receiving coil, which is used for wireless communication between the receiving end main control module and the resonant receiving coil.

[0044] In one embodiment, the in-vivo energy receiving device further includes a DCDC circuit:

[0045] The DCDC circuit is connected to the ACDC rectification circuit and is used to step up or step down the input direct current.

[0046] In one embodiment, the extracorporeal energy transmitting device further includes a low-voltage DC power supply unit.

[0047] The low-voltage DC power supply unit is connected to the transmitting end main control module and the transmitting end DC power supply power detection unit, and is used to provide low-voltage DC electrical energy.

[0048] The above-mentioned adaptive percutaneous wireless energy transmission system is connected to the resonant transmitting coil through the transmitting end phase detection unit, which is used to detect the phase difference between the voltage and current in the resonant transmitting coil and send the phase difference to the transmitting end main control module; the transmitting end main control module is used to send a first control signal to the first adjustable resonant capacitor array based on the phase difference to adjust the capacitance value of the capacitor array. The receiving end phase detection unit is connected to the resonant receiving coil, which is used to detect the phase difference between the voltage and current in the resonant receiving coil and send the phase difference to the receiving end main control module; the receiving end main control module is used to send a second control signal to the second adjustable resonant capacitor array based on the phase difference to adjust the capacitance value of the capacitor array. The adaptive percutaneous wireless energy transmission system provided in this embodiment seeks the consistency of the resonant points outside and inside the body through the adjustable resonant capacitor array, automatically finds the optimal transmission performance, and achieves the optimization of percutaneous wireless energy transmission between the outside and inside of the body.

[0049] Details of one or more embodiments of this application are set forth in the following drawings and description, so that other features, objects, and advantages of this application will become more concise and understandable. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The drawings described herein are used to provide a further understanding of this application and constitute a part of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application. In the drawings:

[0051] Figure 1 is a structural block diagram of the adaptive percutaneous wireless energy transmission system in one of the embodiments;

[0052] Figure 2 is a structural block diagram of the adaptive percutaneous wireless energy transmission system in one of the embodiments;

[0053] Figure 3 is a circuit diagram of the first adjustable resonant capacitor array in one of the embodiments;

[0054] Figure 4 is a structural block diagram of the adaptive percutaneous wireless energy transmission system in one of the embodiments;

[0055] Figure 5 is a circuit diagram of the first adjustable resonant capacitor array in one of the embodiments;

[0056] Figure 6 is a structural block diagram of the adaptive percutaneous wireless energy transmission system in one of the embodiments. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0057] In order to make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be described and explained below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0058] An embodiment of the present application provides an adaptive percutaneous wireless energy transmission system. As Figure 1 shown, it includes an external energy transmitting device 10 and an internal energy receiving device 20. Energy is transmitted between the external energy transmitting device 10 and the internal energy receiving device 20 in a magnetic coupling manner through resonant coils for energy transmission between the outside and inside of the body.

[0059] The external energy transmitting device 10 includes a power supply module 101, a resonant transmitting coil 102 (LC series or parallel resonant transmitting coil), a first adjustable resonant capacitor array 103, a transmitting end phase detection unit 104, and a transmitting end main control module 105 (MCU unit); the output end of the power supply module 101 is connected to the resonant transmitting coil 102 for supplying energy to the resonant transmitting coil 102; the transmitting end phase detection unit 104 is connected to the resonant transmitting coil 102 for detecting the phase difference between the voltage and current in the resonant transmitting coil 102 and sending the phase difference to the transmitting end main control module 105; the transmitting end main control module 105 is used to send a first control signal to the first adjustable resonant capacitor array 103 based on the phase difference to adjust the capacitance value of the capacitor array.

[0060] The internal energy receiving device 20 includes a resonant receiving coil 201 (LC series or parallel resonant receiving coil), a second adjustable resonant capacitor array 202, a receiving end phase detection unit 203, and a receiving end main control module 204 (MCU unit); the receiving end phase detection unit 203 is connected to the resonant receiving coil 201 for detecting the phase difference between the voltage and current in the resonant receiving coil 201 and sending the phase difference to the receiving end main control module 204; the receiving end main control module 204 is used to send a second control signal to the second adjustable resonant capacitor array 202 based on the phase difference to adjust the capacitance value of the capacitor array.

[0061] See Figure 1 , the wireless energy transmission system further includes a transmitting end modulation and demodulation circuit 106 and a receiving end modulation and demodulation circuit 205 for in-vivo and in-vitro data communication based on the coupling between the transmitting and receiving coils. The transmitting end modulation and demodulation circuit 106 is connected to the transmitting end main control module 105, and the receiving end modulation and demodulation circuit 205 is connected to the receiving end main control module 204.

[0062] Among them, the LC resonant transmitting coil 102 can be in series resonance or parallel resonance. The phase detection unit 104 at the LC transmitting end detects the phase difference between the voltage and current in the LC resonant transmitting coil 102 and outputs the phase detection result to the main control MCU unit at the transmitting end. This phase difference is used to determine whether the transmitting coil is at the resonant point or deviated from the resonant point. If the phase difference is 0, it indicates a strong resonance state. If it deviates from the resonant point, it is adjusted by the first adjustable resonant capacitor array 103 until the internal and external resonant points are at the same frequency point or within an acceptable range.

[0063] The LC resonance at the receiving end is similar to that outside the body. The LC resonant receiving coil 201 can be in series resonance or parallel resonance. The phase detection unit 203 at the LC receiving end detects the phase difference between the voltage and current in the LC resonant receiving coil and outputs the phase detection result to the main control MCU unit at the receiving end. This phase difference is used to determine whether the receiving coil is at the resonant point or deviated from the resonant point. If the phase difference is 0, it indicates a strong resonance state. If it deviates from the resonant point, it is adjusted by the second adjustable resonant capacitor array 202 until the internal and external resonant points are at the same frequency point or within an acceptable range.

[0064] In this embodiment, the phase detection unit detects the phase difference between the voltage and current in the LC resonant coil. When the phase difference is 0, it indicates a strong resonance state. If the resonant frequency at this time is the same as the resonant frequencies of the LC resonant coils outside and inside the body before coupling, the coupling efficiency and the wireless energy transmission efficiency are the highest at this time. However, this state is difficult to achieve because the implantation depth and implantation site of the implant will have a great impact on the resonant point of the LC resonant coil of the implant. Therefore, to achieve better energy transmission efficiency, a method of adjustable resonant frequency should be adopted. In this application, the resonant frequency is adjusted by the adjustable resonant capacitor array, which is much more convenient than adjusting the inductor. The adaptive transcutaneous wireless energy transmission system provided in this embodiment seeks the consistency of the resonant points outside and inside the body by adjusting the adjustable resonant capacitor array, automatically searches for the optimal transmission performance, and achieves the optimization of transcutaneous wireless energy transmission between the outside and inside of the body.

[0065] In one of the embodiments, as Figure 2 shown, the external energy transmitting device 10 further includes a transmitting end DC power supply power detection unit 107, and the internal energy receiving device 20 further includes an AC-DC rectification circuit 206 and a receiving end DC input power detection unit 207. The transmitting end DC power supply power detection unit 107 is connected to the output end of the power supply module 101 and is used to detect the power supply power at the transmitting end. The AC-DC rectification circuit 206 is connected to the resonant receiving coil 201 and is used to convert alternating current into direct current. The receiving end DC input power detection unit 207 is connected to the AC-DC rectification circuit 206 and is used to detect the input power at the receiving end.

[0066] The master control module 105 at the transmitting end is further configured to send a first control signal to the first adjustable resonant capacitor array 103 to adjust the capacitance value of the capacitor array based on the ratio of the input power of the receiving end to the power supply power of the transmitting end; the master control module 204 at the receiving end is further configured to send a second control signal to the second adjustable resonant capacitor array 202 to adjust the capacitance value of the capacitor array based on the ratio of the input power of the receiving end to the power supply power of the transmitting end.

[0067] Wherein, the power supply module 101 includes a high-voltage power supply 1011 and a power amplifier 1012. The high-voltage power supply 1011 is connected to the master control module 105 at the transmitting end. The master control module 105 at the transmitting end is configured to adjust the voltage and power output by the high-voltage power supply 1011. The input end of the power amplifier 1012 is connected to the output end of the high-voltage power supply 1011, and is configured to convert the DC power supply into a high-frequency signal, and amplify the output AC power when the power supply increases. The output end of the power amplifier 1012 is connected to the resonant transmitting coil, and is configured to provide energy to the resonant transmitting coil.

[0068] The high-voltage power supply 1011 and the power amplifier 1012 are the basis for percutaneous wireless energy transmission. The power amplifier 1022 generates radio frequency energy sufficient to drive the power supply required by the receiving end, and performs percutaneous energy transmission through LC coil resonant coupling. The power amplifier 1022 can output different powers according to the output voltage of the power supply of the power amplifier. The output voltage and power of the power supply of the power amplifier 1022 can be controlled and adjusted by the master control module 105 at the transmitting end. The DC power supply power detection unit 107 at the transmitting end is connected to the master control module 105 at the transmitting end. The master control module 105 at the transmitting end collects relevant analog signals through the analog-to-digital converter ADC to calculate the DC input power of the power amplifier 1022.

[0069] In this embodiment, the LC resonance points outside and inside the body are adjusted according to the maximum value of the ratio of the DC input power of the receiving end to the power supply power of the power amplifier at the transmitting end. The adjustment is performed through the adjustable resonant capacitor array to achieve adaptive adjustment, automatically find the optimal energy transmission efficiency, and optimize the percutaneous wireless energy transmission between the outside and inside of the body.

[0070] There are three ways of adaptive regulation for the adaptive percutaneous wireless energy transmission system in the above embodiments: First, the LC resonance points outside and inside the body are adjusted according to the maximum value of the ratio of the DC input power at the receiving end to the power supply power of the power amplifier at the transmitting end. The adjustment is carried out through the adjustable resonance capacitor arrays (the first adjustable resonance capacitor array 103 and the second adjustable resonance capacitor array 202); Second, by seeking the consistency of the resonance points outside and inside the body, the optimization of the percutaneous wireless energy transmission between the outside and inside of the body is sought; The third is the combination of the first method and the second method. The ultimate goal is that the energy received in the body is just enough, the LC resonance coils outside and inside the body are in the optimal resonance state, and the power amplifier outside the body only outputs enough power.

[0071] In one of the embodiments, the structures of the first adjustable resonance capacitor array 103 and the second adjustable resonance capacitor array 202 are the same. As Figure 3 shown, the first adjustable resonance capacitor array 103 includes: a main resonance capacitor C1, and the main resonance capacitor C1 is connected in series with the resonance transmitting coil L1; It also includes N-way switched capacitor circuits; Among them, each switched capacitor circuit includes a first resonance capacitor, a second resonance capacitor, a first switching tube, and a second switching tube. The first resonance capacitor is connected to the first switching tube, and the second resonance capacitor is connected to the second switching tube. Specifically, as Figure 3 shown, the first switched capacitor circuit includes sub-resonance capacitors C2 and C3, and switching tubes M1 and M5; The second switched capacitor circuit includes capacitor sub-resonance capacitors C4 and C5, and switching tubes M2 and M6...

[0072] In one of the embodiments, the first switching tube is a first MOSFET tube, the second switching tube is a second MOSFET tube, the gates of the first MOSFET tube and the second MOSFET tube are connected to a first control signal; The drain of the first MOSFET tube is connected to the first resonance capacitor; The drain of the second MOSFET tube is connected to the second resonance capacitor; The sources of the first MOSFET tube and the second MOSFET tube are connected to the common ground.

[0073] Specifically, the switching tubes in the adjustable resonance capacitor array are all MOSFET tubes. In Figure 3 the N + 1 control signals VmodISO_0 to Vmod_ISO_N are used to adjust the required adjustable capacitance. Using the binary calculation method, the capacitance corresponding to VmodISO_0 is 10 pF, and the capacitance corresponding to VmodISO_1 is 20 pF, which is 2 0 + 2 1= 3. When both VmodISO_0 and VmodISO_1 are high-level signals, the effective adjustable capacitance is 30 pF, which is three times that of 10 pF when VmodISO_0 is high-level (2 0 + 2 1 = 3); Similarly, if VmodISO_0 to VmodISO_N are all turned on, the effective capacitance value is 10 pF × (2 0 + 2 1 + …… + 2 N ); The capacitance value connected to VmodISO_N is 2 N × 10 pF. Taking 10 pF as the adjustable base number, other capacitance values can be selected according to needs.

[0074] Figure 3 RF+ and RF- in are connected to the ACDC rectifier circuit and the demodulation circuit in the body, and the modulation circuit can be realized by switching the capacitance values of different resonant capacitor arrays.

[0075] Among them, the withstand voltage of the adjustable resonant capacitors in the adjustable resonant capacitor array does not need to be too high, and only a low-voltage NP0 or C0G material high-precision ceramic capacitor is required. The withstand voltage of the capacitor and the MOSFET tube should be selected according to the voltage difference between RF+ and RF- at the receiving end.

[0076] In one embodiment, as Figure 4 shown, the external energy transmitting device 10 and the internal energy receiving device 20 both include an isolated low-voltage power supply unit and an isolated control signal generating unit. The structures of the first adjustable resonant capacitor array 103 and the second adjustable resonant capacitor array 202 are the same. Among them, the first adjustable resonant capacitor array 103 includes a plurality of parallel switch capacitor circuits, and each switch capacitor circuit includes a first capacitor, a first switch tube, and a second switch tube, and the first capacitor, the first switch tube, and the second switch are connected in sequence.

[0077] As Figure 5 shown, the specific structure of the adjustable resonant capacitor array is shown. The resonant transmitting coil L1 is connected to the first adjustable resonant capacitor array 103. The adjustable resonant capacitor array includes N parallel switch capacitor circuits, which are composed of capacitors and switch tubes. As Figure 5 shown, the first parallel switch capacitor circuit includes capacitor C1, switch tube U1, and switch tube U2; the second parallel switch capacitor circuit includes capacitor C2, switch tube U3, and switch tube U4...

[0078] In one embodiment, the first switching transistor is a first gallium nitride MOS transistor, the second switching transistor is a second gallium nitride MOS transistor, the drain of the first gallium nitride MOS transistor is connected to the first capacitor; the gate of the first gallium nitride MOS transistor is connected to the gate of the second gallium nitride MOS transistor; the source of the first gallium nitride MOS transistor is connected to the source of the second gallium nitride MOS transistor; the source of the second gallium nitride MOS transistor is connected to the common ground.

[0079] Specifically, the switching transistors in the adjustable resonant capacitor array are all gallium nitride MOS transistors (GaN transistors). In another embodiment, the switching transistors are all high-voltage MOSFET transistors. In particular, the extracorporeal energy transmitting device 10 includes a transmitting-end isolated low-voltage power supply unit 108 and a transmitting-end isolated control signal generating unit 109, and the extracorporeal energy receiving device 20 includes a receiving-end isolated low-voltage power supply unit 208 and a receiving-end isolated control signal generating unit 209. The isolated control signal is used to control the on / off of the gallium nitride MOS transistors or high-voltage MOSFET transistors in the adjustable resonant capacitor array.

[0080] In Figure 5 , Vmod_ISO_N and GND_ISO are isolated control signals, which are completely isolated from the power supply domain of the power amplifier. The N + 1 control signals VmodISO_0 to Vmod_ISO_N are used to adjust the required adjustable capacitors. Using the binary calculation method, the capacitor C1 corresponding to VmodISO_0 is 10 pF, and the capacitor C2 corresponding to VmodISO_1 is 20 pF, that is 2 0 +2 1 = 3. When VmodISO_0 and VmodISO_1 are both high-level signals at the same time, the effective adjustable capacitor is 30 pF, which is 3 times that of 10 pF when VmodISO_0 is at a high level (2 0 +2 1 = 3); Similarly, if VmodISO_0 to VmodISO_N are all turned on, the effective capacitance value is 10 pF × (2 0 +2 1 +……+2 N ); The capacitance value connected to VmodISO_N is 2 N ×10 pF. 10 pF is used as the adjustable base number, and other capacitance values can be selected according to needs.

[0081] The adjustable resonant capacitor CN in this embodiment may be a ceramic capacitor made of high-voltage-resistant and high-precision NP0 or C0G materials. The breakdown voltage of the capacitor and the GaN transistor or high-voltage MOSFET transistor should be selected according to the Q value of the LC series resonance or parallel resonance and the output voltage. It is also necessary to consider the influence of the output capacitance of the GaN transistor or high-voltage MOSFET transistor on the total capacitance value of the resonant capacitor array when the control signal of the GaN transistor or high-voltage MOSFET transistor is at a low level.

[0082] In one of the embodiments, as Figure 1 shown, the extracorporeal energy transmitting device 10 includes a transmitting-end modulation and demodulation circuit 106, and the intracorporeal energy receiving device 20 includes a receiving-end modulation and demodulation circuit 205. One end of the transmitting-end modulation and demodulation circuit 106 is connected to the transmitting-end main control module 105, and the other end is connected to the resonant transmitting coil 102 for wireless communication between the transmitting-end main control module 105 and the resonant transmitting coil 102. One end of the receiving-end modulation and demodulation circuit 205 is connected to the receiving-end main control module 204, and the other end is connected to the resonant receiving coil 201 for wireless communication between the receiving-end main control module 204 and the resonant receiving coil 201.

[0083] In one of the embodiments, as Figure 6 shown, the extracorporeal energy transmitting device 10 further includes a low-voltage DC power supply unit 110, which is connected to the transmitting-end main control module 105 and the transmitting-end DC power supply power detection unit 107 for providing low-voltage DC electrical energy. The intracorporeal energy receiving device 20 further includes a battery management and DCDC circuit 210 connected to the ACDC rectification circuit 206. The DCDC circuit is used to step up or step down the input direct current, and the battery management is used to provide electrical energy.

[0084] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0085] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An adaptive transcutaneous wireless energy transmission system, comprising an in vitro energy transmitting device and an in vivo energy receiving device, characterized in that: The in vitro energy transmitting device comprises a power supply module, a resonant transmitting coil, a first adjustable resonant capacitor array, a transmitting end phase detection unit, and a transmitting end main control module; wherein: The power amplifier output end of the power supply module is connected to the resonant transmitting coil, so as to provide energy to the resonant transmitting coil; The transmitting end phase detection unit is connected to the resonant transmitting coil, and is used to detect the phase difference between the voltage and the current in the resonant transmitting coil, and send the phase difference to the transmitting end main control module; The transmitting end main control module is used to send a first control signal to the first tunable resonant capacitor array based on the phase difference to adjust the capacitance value of the capacitor array; The in-vivo energy receiving device comprises a resonant receiving coil, a second adjustable resonant capacitor array, a receiving end phase detection unit, and a receiving end main control module; wherein: The receiving end phase detection unit is connected to the resonant receiving coil, and is used to detect the phase difference between the voltage and the current in the resonant receiving coil, and send the phase difference to the receiving end main control module; The receiving end main control module is used to send a second control signal to the second tunable resonant capacitor array based on the phase difference to adjust the capacitance value of the capacitor array.

2. The system according to claim 1, characterized in that The in-vitro energy transmitting device further comprises a transmitting end DC power supply power detection unit, and the in-vivo energy receiving device further comprises an ACDC rectifier circuit and a receiving end DC input power detection unit. The transmitting end DC power supply power detection unit is connected to the output end of the power supply module and is used to detect the power supply power of the transmitting end; The ACDC rectifier circuit is connected to the resonant receiving coil and is used to convert alternating current into direct current; The receiving end DC input power detection unit is connected to the ACDC rectifier circuit and is used to detect the input power of the receiving end; The transmitting end main control module is further used to send a first control signal to the first tunable resonant capacitor array to adjust the capacitance value of the capacitor array based on the ratio of the input power of the receiving end to the power supply of the transmitting end; The receiving end main control module is also used to send a second control signal to the second tunable resonant capacitor array to adjust the capacitance value of the capacitor array based on the ratio of the input power of the receiving end to the power supply power of the transmitting end.

3. The system according to claim 2, characterized in that The first tunable resonant capacitor array has the same structure as the second tunable resonant capacitor array, and the first tunable resonant capacitor array includes: A main resonant capacitor; the main resonant capacitor is connected in series with the resonant transmitting coil; A multi-channel switch capacitor circuit; wherein each switch capacitor circuit includes a first resonant capacitor, a second resonant capacitor, a first switch tube, and a second switch tube, the first resonant capacitor is connected to the first switch tube, and the second resonant capacitor is connected to the second switch tube.

4. The system according to claim 3, characterized in that The first switch tube is a first MOSFET tube, and the second switch tube is a second MOSFET tube. The gate of the first MOSFET tube and the gate of the second MOSFET tube are connected to a first control signal; The drain of the first MOSFET tube is connected to the first resonant capacitor; the drain of the second MOSFET tube is connected to the second resonant capacitor; The source of the first MOSFET tube and the source of the second MOSFET tube are connected to a common ground.

5. The system according to claim 2, characterized in that The in vitro energy transmitting device and the in vivo energy receiving device both include an isolated low-voltage power supply unit and an isolated control signal generating unit. The first tunable resonant capacitor array has the same structure as the second tunable resonant capacitor array. The first tunable resonant capacitor array includes: Multiple parallel switched capacitor circuits; Wherein, each switch capacitor circuit comprises a first capacitor, a first switch tube, and a second switch tube, and the first capacitor, the first switch tube, and the second switch are connected in sequence; The isolation control signal generating unit is connected to the first adjustable resonant capacitor array, and is used for isolating the first control signal and then sending the isolation control signal to the first adjustable resonant capacitor array to adjust the capacitance value of the capacitor array; The isolated low-voltage power supply unit is connected to the isolated control signal generating unit and is used for providing isolated electrical energy.

6. The system according to claim 5, characterized in that The first switch tube is a first gallium nitride MOS tube, and the second switch tube is a second gallium nitride MOS tube. The drain of the first gallium nitride MOS tube is connected to the first capacitor; The gate of the first gallium nitride MOS tube is connected to the gate of the second gallium nitride MOS tube; The source electrode of the first gallium nitride MOS tube is connected to the source electrode of the second gallium nitride MOS tube; The source of the second gallium nitride MOS tube is connected to the common ground.

7. The system according to claim 1, characterized in that The power supply module comprises: A high-voltage power supply, the high-voltage power supply is connected to the transmitter main control module, and the transmitter main control module is also used to adjust the voltage and power output by the high-voltage power supply; The power amplifier connected to the high voltage power supply is used to convert the DC power supply into a high frequency signal and amplify the output AC power when the power supply is increased.

8. The system according to claim 1, characterized in that The in-vitro energy transmitting device further comprises a transmitting end modulation and demodulation circuit, and the in-vitro energy receiving device further comprises a receiving end modulation and demodulation circuit. One end of the transmitter modulation and demodulation circuit is connected to the transmitter main control module, and the other end is connected to the resonant transmitting coil, for wireless communication between the transmitter main control module and the resonant transmitting coil; One end of the receiving end modulation and demodulation circuit is connected to the receiving end main control module, and the other end is connected to the resonant receiving coil, and is used for wireless communication between the receiving end main control module and the resonant receiving coil.

9. The system according to claim 2, characterized in that The in vivo energy receiving device further comprises a DCDC circuit: The DCDC circuit is connected to the ACDC rectifier circuit and is used to step up or step down the input direct current.

10. The system according to claim 2, characterized in that The in vitro energy transmitting device also includes a low voltage DC power supply unit, The low-voltage DC power supply unit is connected to the transmitter main control module and the transmitter DC power supply power detection unit, and is used to provide low-voltage DC power.

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