CN113922518B

CN113922518B - Get rid of switching power supply's wireless charging system of magnetic resonance

Info

Publication number: CN113922518B
Application number: CN202111260963.1A
Authority: CN
Inventors: 喻易强; 罗鑫; 李伟
Original assignee: Chengdu Sprouting Technology Co ltd
Current assignee: Chengdu Sprouting Technology Co ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2024-03-26
Anticipated expiration: 2041-10-28
Also published as: CN113922518A

Abstract

The invention discloses a magnetic resonance wireless charging system for removing a switching power supply, which comprises a transmitting module and a receiving module which are connected with each other; the transmitting module comprises a transmitting end communication control circuit, a transmitting end auxiliary power circuit, a transmitting end input circuit, a transmitting end sampling circuit, a transmitting end PWM modulation circuit, a transmitting end protection circuit, a transmitting end frequency conversion circuit and a transmitting end inverter circuit; the receiving module comprises a receiving end communication control circuit, a receiving end auxiliary power circuit, a receiving end rectifying and filtering circuit, a receiving end current sampling circuit and a receiving end temperature sampling circuit. The invention provides a magnetic resonance wireless charging system without a switching power supply, which can adjust the working frequency and the excitation amplitude of a transmitting end inverter circuit according to the requirements of output voltage and current, and solves the problem of power overflow of a common wireless charging mode with the switching power supply.

Description

Get rid of switching power supply's wireless charging system of magnetic resonance

Technical Field

The invention belongs to the technical field of wireless power transmission, and particularly relates to a magnetic resonance wireless charging system for removing a switching power supply.

Background

With the continuous development of electronic information technology and automation control technology, various home appliances, consumer electronics, mobile communication devices and the like have been widely popularized, however, conventional home appliances rely on wired connection between a power cord and a power socket to realize power supply, and electronic devices employing built-in batteries also need wired connection between a charging cord and the power socket to be charged, so that we can see the wires for supplying power to these electronic devices everywhere. These wires not only occupy our active space, limiting the convenience of the device use, but also create the potential safety hazard of electricity use. Therefore, with the increasing demands of people for portable devices and green energy systems that can be used completely wirelessly, research and application of wireless energy transmission technology is rapidly becoming the focus of academia and industry at home and abroad. Currently, the wireless charging technology accepted in the industry is mainly divided into three types, namely a QI standard of WPC alliance initiative, also called a magnetic induction coupling technology, a magnetic resonance coupling technology of Airfuel alliance initiative, and an electromagnetic radiation type wireless energy transmission technology. Compared with the magnetic induction technology, the magnetic resonance coupling technology has obvious advantages in charging distance, space freedom degree, one-to-many charging and power expansion; compared with electromagnetic radiation type wireless energy transmission technology, the magnetic resonance coupling technology has more practical application value in the aspects of energy conversion efficiency, transmission power and electromagnetic safety. At present, the technology is gradually applied to equipment such as intelligent wearing, sweeping robots and AGVs, endows the equipment with a wireless charging function, improves the safety and the intelligent degree of the equipment, and improves the use experience of users. In addition, the application of the magnetic resonance coupling technology in the field of intelligent home is also to subvert the use modes of traditional household appliances, mobile communication equipment and consumer electronic products, take a house as a platform, thoroughly remove all power lines in a home living area by utilizing the magnetic resonance wireless charging technology, the hidden wiring technology and the automatic control technology, wirelessly charge or continuously supply electric energy to the equipment, improve the safety, convenience and comfort of the house, and construct a living environment with high efficiency, environmental protection and energy conservation.

Wireless energy transmission modes and mechanisms can be broadly divided into three modes, magnetic induction coupling, electromagnetic radiation and magnetic resonance coupling. The wireless charging system disclosed at present has the following defects that the requirements cannot be met: firstly, the wireless charging power supply system on the market at present is of a load drag type, the receiving end limits the maximum output power of the wireless charging system through a voltage stabilizing circuit, and the load performs electric energy consumption according to the power requirement of equipment at the limited power. In this mode, the transmitting power of the transmitting end does not just meet the load power of the receiving end, and there is often a situation that the transmitting energy overflows, and when the load power is gradually reduced in this state, the more the power of the transmitting end overflows, so that the conversion efficiency of the system becomes low. The transmitting end of the wireless charging system can be converted into an active regulation type by removing a switching power supply of the receiving end, the transmitting end adjusts the working frequency or changes the amplitude of an excitation source through real-time data communication to change the power change of the output end, and the transmitting end can adjust the output power in real time according to the state of the receiving end, so that the receiving power just meets the load power, the highest efficiency of the wireless charging system is ensured, and the best working state is ensured. Second, because the present wireless charging system all adopts comparatively traditional switching power supply to charge power supply to battery and equipment, traditional switching power supply is low for the heat loss after reaching certain power, has to select the inductive device of bigger volume and leads to the volume can't the size and can't satisfy some application demand, and switching power supply has certain conversion efficiency, and the efficiency part that can't convert will accumulate on the PCB with the form of heat energy, leads to the temperature to overrun. When the size of the receiving end or the transmitting end is limited, the thermal design of the switching power supply is difficult, and the reliability is reduced. The switching power supply of the receiving end can reduce the conversion rate of the wireless charging system to a certain extent, so that the electric energy utilization rate is reduced. Third, there are some potential safety hazards in the wireless chargers on the market at present, for example, many wireless charging modules require users not to move at will during charging, otherwise damage is caused, or users cannot attach the transceiver antennas together, otherwise damage is possibly caused, which indicates that the design of some wireless modules has great limitation and cannot meet the requirements of high safety and high reliability of the customers to a certain extent.

Disclosure of Invention

The invention aims to solve the defects that some wireless charging systems on the market at present cannot meet the wireless charging requirements of high conversion efficiency, strict limit on receiving and transmitting size, strict control on heating value, wide charging distance change range requirement and high reliability requirement, and provides a magnetic resonance wireless charging system without a switching power supply.

The technical scheme of the invention is as follows: a magnetic resonance wireless charging system for removing a switching power supply comprises a transmitting module and a receiving module which are connected with each other; the transmitting module and the receiving module are both free of a switching power supply;

the working mode of the magnetic resonance wireless charging system comprises the following steps: adjusting the working frequency of the magnetic resonance wireless charging system according to the output current requirement or the output voltage requirement of the receiving module, adjusting the excitation amplitude of the magnetic resonance wireless charging system according to the output current requirement or the output voltage requirement of the receiving module, and simultaneously adjusting the working frequency and the excitation amplitude of the magnetic resonance wireless charging system according to the output current requirement or the output voltage requirement of the receiving module;

the transmitting module comprises a transmitting end communication control circuit, a transmitting end auxiliary power circuit, a transmitting end input circuit, a transmitting end sampling circuit, a transmitting end PWM modulation circuit, a transmitting end protection circuit, a transmitting end frequency conversion circuit and a transmitting end inverter circuit;

The transmitting end auxiliary power circuit, the transmitting end sampling circuit, the transmitting end PWM modulation circuit, the transmitting end protection circuit, the transmitting end frequency conversion circuit and the transmitting end inverter circuit are all in communication connection with the transmitting end communication control circuit; the transmitting end input circuit, the transmitting end sampling circuit, the transmitting end PWM modulation circuit, the transmitting end protection circuit, the transmitting end frequency conversion circuit and the transmitting end inverter circuit are all in communication connection with the transmitting end auxiliary power supply module; the transmitting end input circuit is respectively in communication connection with the transmitting end sampling circuit, the transmitting end protection circuit, the transmitting end frequency conversion circuit and the transmitting end inverter circuit; the transmitting end protection circuit is respectively connected with the transmitting end PWM modulation circuit and the transmitting end sampling circuit in a communication way;

the receiving module comprises a receiving end communication control circuit, a receiving end auxiliary power circuit, a receiving end rectifying and filtering circuit, a receiving end current sampling circuit and a receiving end temperature sampling circuit;

the receiving end auxiliary power circuit, the receiving end current sampling circuit and the receiving end temperature sampling circuit are all in communication connection with the receiving end communication control circuit; the receiving end auxiliary power circuit is respectively connected with the receiving end rectifying and filtering circuit and the receiving end temperature sampling circuit in a communication way; the receiving end current sampling circuit is respectively connected with the receiving end rectifying and filtering circuit and the receiving end temperature sampling circuit in a communication way; the transmitting end communication control circuit and the receiving end communication control circuit are connected through an antenna.

Further, the emission end auxiliary power supply circuit comprises a grounding resistor R1, a resistor R2, a resistor R7, a resistor R12, a resistor R17, a resistor R19, a grounding resistor R21, grounding resistors R27-R28, a capacitor C10, a grounding capacitor C17, grounding capacitors C22-C23, grounding capacitors C29-C35, a grounding capacitor C44-grounding capacitor C51, an inductor L2, a diode D3, a diode D5, a MOS tube Q1, a MOS tube Q4, a port JP3, a power supply chip U3 and voltage stabilizing chips VR1-VR4;

the 1 st pin of the power chip U3 is connected with one end of the capacitor C10; the 2 nd pin of the power chip U3 and the anode of the diode D5 are grounded; the 3 rd pin of the power chip U3 is respectively connected with one ends of a grounding resistor R27, a grounding resistor R28 and a resistor R19; the 4 th pin of the power chip U3 is respectively connected with the cathode of the diode D5, one end of the resistor R17 and the grounding resistor R21; the 5 th pin of the power chip U3 is respectively connected with the other end of the resistor R17 and the grounding capacitor C17; the 6 th pin of the power chip U3 is respectively connected with the cathode of the diode D3, the other end of the capacitor C10 and one end of the inductor L2; the positive electrode of the diode D3 is grounded; the drain electrode of the MOS tube Q4 is connected with the 1 st pin of the port JP 3; pin 2 of port JP3 is grounded; the grid electrode of the MOS tube Q4 is respectively connected with one end of a resistor R12 and one end of a resistor R7; the drain electrode of the MOS tube Q1 is connected with the other end of the resistor R7; the grid electrode of the MOS tube Q1 is respectively connected with one end of a grounding resistor R1 and one end of a resistor R2; the source electrode of the MOS tube Q1 is grounded;

The 1 st pin of the voltage stabilizing chip VR1 is respectively connected with the grounding capacitor C31, the grounding capacitor C32, the 3 rd pin of the voltage stabilizing chip VR3, the grounding capacitor C44 and the grounding capacitor C45, and the connection point is used as the 5V5 pin of the auxiliary power circuit of the transmitting end; the 2 nd pin of the voltage stabilizing chip VR1 is grounded; the 3 rd pin of the voltage stabilizing chip VR1 is respectively connected with the other end of the inductor L2, the other end of the resistor R19, the grounding capacitor C22, the grounding capacitor C23, the other end of the resistor R12, the source electrode of the MOS tube Q4, the grounding capacitor C29, the grounding capacitor C30, the 3 rd pin of the voltage stabilizing chip VR2, the grounding capacitor C33 and the grounding capacitor 34, and the connection point is used as the +12V pin of the auxiliary power circuit of the transmitting end; the 1 st pin of the voltage stabilizing chip VR2 is respectively connected with the grounding capacitor C35, the 3 rd pin of the voltage stabilizing chip VR4, the grounding capacitor C48 and the grounding capacitor C49, and the connection point is used as the +5V pin of the auxiliary power circuit of the transmitting end; the 2 nd pin of the voltage stabilizing chip VR2 is grounded; the 1 st pin of the voltage stabilizing chip VR3 is grounded; the 2 nd pin of the voltage stabilizing chip VR3 is respectively connected with the grounding capacitor C46 and the grounding capacitor C47, and the connection point of the 2 nd pin is used as the +3.3V pin of the auxiliary power circuit of the transmitting end; the 1 st pin of the voltage stabilizing chip VR4 is grounded; the 2 nd pin of the voltage stabilizing chip VR4 is respectively connected with the grounding capacitor C50 and the grounding capacitor C51, and the connection point of the 2 nd pin is used as the 3V3 pin of the auxiliary power circuit of the transmitting end;

The transmitting end communication control circuit comprises a magnetic bead FB3, a resistor R144-R145, a capacitor C98, grounding capacitors C100-C109, grounding capacitors C110-C111, a grounding capacitor C117, grounding capacitors C123-C126, a grounding capacitor C128, a grounding capacitor C131, a grounding capacitor C133, a diode D19, inductors L4-L6, a crystal oscillator Y3, a control chip U20 and an antenna A1;

the 15 th pin of the control chip U20 is respectively connected with a grounding capacitor C103, a grounding capacitor C104, a grounding capacitor C105, a grounding capacitor C106, a grounding capacitor C107, a grounding capacitor C108, a grounding capacitor C109, the cathode of a diode D19 and one end of a magnetic bead FB 3; the 12 th pin, the 14 th pin and the 49 th pin of the control chip U20 are all grounded; the 13 th pin of the control chip U20 is connected with the grounding capacitor C111; the 19 th pin of the control chip U20 is connected with the grounding capacitor C117; the 18 th pin of the control chip U20 is respectively connected with the grounding capacitor C123, the grounding capacitor C124, the grounding capacitor C125, the grounding capacitor C126 and the 39 th pin of the control chip U20; the 36 th pin of the control chip U20 is respectively connected with one end of the resistor R145 and the grounding capacitor C128; the other end of the resistor R145 is connected with a 3V3 pin of the transmitting end auxiliary power circuit; the 16 th pin of the control chip U20 is connected with one end of the inductor L4; the 17 th pin of the control chip U20 is connected with the other end of the inductor L4; the 37 th pin of the control chip U20 is respectively connected with one end of the inductor L6 and the grounding capacitor C110; the 38 th pin of the control chip U20 is respectively connected with the other end of the inductor L6, one end of the capacitor C98 and the grounding capacitor C100; the other end of the capacitor C98 is connected with one end of the grounding capacitor C101 and one end of the inductor L5 respectively; the other end of the inductor L5 is respectively connected with the grounding capacitor C102 and the 1 st pin of the antenna A1; the 2 nd pin of the antenna A1 is grounded; the 31 st pin of the control chip U20 is connected with one end of the resistor R144; the 40 th pin of the control chip U20 is respectively connected with the grounding capacitor C131 and the 3 rd pin of the crystal oscillator Y3; the 41 st pin of the control chip U20 is respectively connected with the grounding capacitor C133 and the 1 st pin of the crystal oscillator Y3; the 2 nd pin and the 4 th pin of the crystal oscillator Y3 are grounded; the 34 th pin of the control chip U20 is connected with the other end of the resistor R2; the other end of the magnetic bead FB3 is connected with a 3V3 pin of the transmitting end auxiliary power supply circuit.

Further, the transmitting end input circuit comprises a resistor R54, a resistor R58, resistors R59-R60, a resistor R65, resistors R67-R70, a grounding resistor R72, grounding capacitors C57-C62, a capacitor C64, grounding capacitors C66-C67, a light emitting diode DS1, diodes D7-D8, a diode T2, a MOS tube N3, a MOS tube Q11, a MOS tube Q13 and an input port JP5;

the 1 st pin of the input port JP5 is respectively connected with one end of a resistor R68, one end of a capacitor C64, the anode of a diode D8 and the source electrode of a MOS tube Q13; the 2 nd pin of the input port JP5 is respectively connected with the cathode of the light emitting diode DS1, one end of the resistor R58, one end of the resistor R60, the cathode of the diode T2, the grounding capacitor C58, the grounding capacitor C59, the grounding capacitor C60, one end of the resistor R54 and the 5 th pin of the power chip U3; the anode of the light-emitting diode DS1 is connected with the other end of the resistor R68; the other end of the resistor R58 is respectively connected with the other end of the capacitor C64 and the cathode of the diode D7; the anode of the diode D7 is respectively connected with the cathode of the diode D8, the other end of the resistor R60, one end of the resistor R70, one end of the resistor R67 and the grounding capacitor C66; the positive electrode of the diode T2 is grounded; the other end of the resistor R70 is connected with the grid electrode of the MOS tube Q13; the drain electrode of the MOS tube Q13 is grounded; the other end of the resistor R67 is connected with a grounding capacitor C67; the other end of the resistor R54 is respectively connected with a grounding capacitor C57, one end of the resistor R59, the 1 st pin of the MOS tube N3, the 2 nd pin of the MOS tube N3 and the 3 rd pin of the MOS tube N3; the other end of the resistor R59 is respectively connected with the 4 th pin of the MOS tube N3 and one end of the resistor R65; the other end of the resistor R65 is connected with the drain electrode of the MOS tube Q11; the grid electrode of the MOS tube Q11 is respectively connected with one end of a resistor R69 and a grounding resistor R72; the 5 th pin of the MOS tube N3 is respectively connected with the 6 th pin of the MOS tube N3, the 7 th pin of the MOS tube N3, the 8 th pin of the MOS tube N3, the grounding capacitor C61 and the grounding capacitor C62; the source electrode of the MOS tube Q11 is grounded;

The transmitting end sampling circuit comprises resistors R92-R95, resistors R97-R98, grounding resistors R100-R102, grounding capacitors C76-C77 and a sampling chip U14;

the grounding resistor R100 is respectively connected with one end of the resistor R92 and one end of the resistor R95; the grounding resistor R101 is respectively connected with one end of the resistor R93 and one end of the resistor R97; the 1 st pin of the sampling chip U14 is respectively connected with one end of a grounding resistor R102 and one end of a resistor R94 and one end of a resistor R98; the 2 nd pin of the sampling chip U14 is grounded; the 3 rd pin of the sampling chip U14 is connected with the 2 nd pin of the input port JP 5; the 4 th pin of the sampling chip U14 is connected with the other end of the resistor R54; the 5 th pin of the sampling chip U14 is respectively connected with a grounding capacitor C76, a grounding capacitor C77 and a +5V pin of the transmitting-end auxiliary power supply circuit; the other end of the resistor R92 is connected with the 5 th pin of the power chip U3; the other end of the resistor R93 is connected with a 5V5 pin of the transmitting end auxiliary power circuit; the other end of the resistor R98 is connected with the 11 th pin of the control chip U20; the other end of the resistor R95 is connected with the 10 th pin of the control chip U20; the other end of the resistor R97 is connected with the 33 rd pin of the control chip U20.

Further, the transmitting end PWM modulation circuit comprises resistors R124-R126, resistors R128-R134, resistors R136-R137, a grounding resistor R138, grounding capacitors C83-C85, a capacitor C86, a grounding capacitor C93, a capacitor C94, grounding capacitors C95-C97, diodes D15-D18, a MOS tube Q20, an amplifier U17A, an amplifier U17B, an amplifier U18A and an amplifier U18B;

One end of a resistor R137 is connected with the grid electrode of the MOS tube Q20; the other end of the resistor R137 is connected with the 32 nd pin of the control chip U20; the source electrode of the MOS tube Q20 is grounded; the drain electrode of the MOS tube Q20 is respectively connected with one end of a resistor R126, one end of a grounding resistor R138 and one end of a resistor R133; the other end of the resistor R133 is respectively connected with one end of the capacitor C86 and one end of the resistor R134; the 5 th pin of the amplifier U17B is respectively connected with the other ends of the grounding capacitor C97 and the resistor R134; the 6 th pin of the amplifier U17B is respectively connected with the other end of the capacitor C86 and one end of the resistor R125; the 7 th pin of the amplifier U17B is respectively connected with the other end of the resistor R125 and one end of the resistor R132; the 3 rd pin of the amplifier U17A is connected with the other end of the resistor R132; the 2 nd pin of the amplifier U17A is connected with one end of a resistor R124; the 1 st pin of the amplifier U17A is respectively connected with the other end of the resistor R124 and one end of the resistor R128; the other end of the resistor R128 is respectively connected with one end of the grounding capacitor C95, one end of the grounding capacitor C96 and one end of the resistor R129; the 8 th pin of the amplifier U17A is respectively connected with the 5V5 pin of the transmitting end auxiliary power supply circuit and the grounding capacitor C85; the 4 th pin of the amplifier U17A is grounded; the other end of the resistor R126 is connected with a 5V5 pin of the transmitting end auxiliary power circuit; the 5 th pin of the amplifier U18B is respectively connected with one end of the resistor R130 and the grounding capacitor C93; the 6 th pin of the amplifier U18B is respectively connected with one end of the capacitor C94, the 7 th pin of the amplifier U18B and the 3 rd pin of the amplifier U18A; the other end of the resistor R130 is connected with the other end of the capacitor C94 and the other end of the resistor R129; the 2 nd pin of the amplifier U18A is respectively connected with the 1 st pin of the amplifier U18A, one end of a resistor R131 and one end of a resistor R136; the 8 th pin of the amplifier U18A is respectively connected with a grounding capacitor C183, a grounding capacitor C184 and a 5V5 pin of the transmitting end auxiliary power supply circuit; the 4 th pin of the amplifier U18A is grounded; the other end of the resistor R131 is respectively connected with the 21 st pin of the control chip U20 and the anode of the diode D15; the cathode of the diode D15 is connected with the anode of the diode D16; the cathode of the diode D16 is connected with the anode of the diode D17; the negative electrode of the diode D17 is connected to the positive electrode of the diode D18.

Further, the transmitting end protection circuit comprises a resistor R55, resistors R146-R147, a grounding resistor R148, resistors R149-R156, a grounding resistor R157, a resistor R160, a grounding resistor R161, resistors R164-R165, resistors R169-R171, a grounding capacitor C63, a grounding capacitor C130, grounding capacitors C134-C135, a grounding capacitor C137, a diode U24, triodes Q23-Q25, a protection chip U10, an amplifier U23, a protection chip U25 and an amplifier U26-U27;

in the transmitting end protection circuit, a protection chip U10 is used as a voltage comparator, and a reference point of the voltage comparator is modified in real time through a transmitting end PWM (pulse width modulation) circuit so that a reference value and a current sampling value of the voltage comparator are fixed variable quantities;

the 2 nd pin of the protection chip U10 is respectively connected with one end of the resistor R55 and the 20 th pin of the control chip U20; the 3 rd pin of the protection chip U10 is grounded; the 5 th pin of the protection chip U10 is respectively connected with the ground capacitor C63, the other end of the resistor R55 and the 3V3 pin of the transmitting end auxiliary power circuit; the 1 st pin of the amplifier U23 is respectively connected with one end of the resistor R152, the 1 st pin of the diode U24 and the 2 nd pin of the diode U24; the other end of the resistor R152 is connected with a 5V5 pin of the transmitting end auxiliary power circuit; the 2 nd pin of the amplifier U23 is grounded; the 3 rd pin of the amplifier U23 is respectively connected with one end of a resistor R147 and a grounding resistor R148; the 3 rd pin of the diode U24 is grounded; the 4 th pin of the amplifier U23 is connected with one end of a resistor R149; the 5 th pin of the amplifier U23 is respectively connected with the 5V5 pin of the transmitting end auxiliary power circuit and the grounding capacitor C130; the other end of the resistor R147 is connected with the 5 th pin of the power chip U3; the other end of the resistor R149 is connected with the 4 th pin of the protection chip U10; the 1 st pin of the protection chip U25 is respectively connected with the 4 th pin of the protection chip U10 and one end of the resistor R150; the 3 rd pin of the protection chip U25 is grounded; the 4 th pin of the protection chip U25 is connected with one end of the resistor R154; the 5 th pin of the protection chip U25 is respectively connected with the grounding capacitor C134, the other end of the resistor R150 and the +3.3V pin of the transmitting-end auxiliary power circuit; the 1 st pin of the amplifier U27 is connected with the other end of the resistor R94; the 2 nd pin of the amplifier U27 is grounded; the 3 rd pin of the amplifier U27 is connected with one end of a resistor R170; the other end of the resistor R170 is connected with the cathode of the diode D18; the 4 th pin of the amplifier U27 is connected with one end of a resistor R169; the 5 th pin of the amplifier U27 is respectively connected with the 5V5 pin of the transmitting end auxiliary power circuit and the grounding capacitor C137; the other end of the resistor R154 is respectively connected with the other end of the resistor R169, one end of the resistor R171, one end of the resistor R153, the collector of the triode Q24 and the other end of the resistor R69; the other end of the resistor R171 is connected with the 23 rd pin of the control chip U20; the other end of the resistor R153 is respectively connected with one end of the resistor R151 and the base electrode of the triode Q23; the other end of the resistor R151 is respectively connected with a +3.3V pin of the emission end auxiliary power supply circuit and one end of the resistor R146; the other end of the resistor R146 is connected with the emitter of the triode Q23; the collector of the triode Q23 is connected with one end of a resistor R155; the other end of the resistor R155 is respectively connected with the collector electrode of the triode Q25, the grounding resistor R157 and the base electrode of the triode Q24; the emitter of the triode Q24 and the emitter of the triode Q25 are grounded; the base electrode of the triode Q25 is respectively connected with one end of a grounding resistor R161 and one end of a resistor R156; the other end of the resistor R156 is connected with the 35 th pin of the control chip U20; the 1 st pin of the amplifier U26 is connected with the other end of the resistor R164; the 2 nd pin of the amplifier U26 is grounded; the 3 rd pin of the amplifier U26 is connected with the other end of the resistor R94; the 4 th pin of the amplifier U26 is connected with one end of a resistor R160; the 5 th pin of the amplifier U26 is respectively connected with the 5V5 pin of the transmitting end auxiliary power circuit and the grounding capacitor C135; the other end of the resistor R160 is respectively connected with one end of the resistor R165 and the 2 nd pin of the protection chip U25; the other end of the resistor R165 is connected with the 23 rd pin of the control chip U20; the other end of the resistor R64 is connected to the other end of the resistor R136.

Further, the transmitting end frequency conversion circuit comprises resistors R56-R57, resistors R61-R62, a resistor R64, grounding capacitors C55-C56, grounding capacitors C70-C71, a crystal oscillator Y1 and a frequency conversion chip N4;

the 1 st pin of the frequency conversion chip N4 is respectively connected with a grounding capacitor C55, a grounding capacitor C56, one end of a resistor R61, the 7 th pin of the frequency conversion chip N4 and the +3.3V pin of the emission end auxiliary power supply circuit; the 2 nd pin of the frequency conversion chip N4 is respectively connected with the grounding capacitor C70 and the 1 st pin of the crystal oscillator Y1; the 3 rd pin of the frequency conversion chip N4 is respectively connected with the grounding capacitor C71 and the 3 rd pin of the crystal oscillator Y1; the 4 th pin of the frequency conversion chip N4 is respectively connected with the 29 th pin of the control chip U20 and the other end of the resistor R56; the 5 th pin of the frequency conversion chip N4 is respectively connected with the 28 th pin of the control chip U20 and the other end of the resistor R61; the 6 th pin of the frequency conversion chip N4 is connected with one end of a resistor R57; the 8 th pin of the frequency conversion chip N4 is grounded; the 9 th pin of the frequency conversion chip N4 is connected with one end of a resistor R62; the 10 th pin of the frequency conversion chip N4 is connected with one end of a resistor R64; the other end of the resistor R57 is respectively connected with the other end of the resistor R62, the other end of the resistor R144 and the other end of the resistor R64; and the 2 nd pin and the 4 th pin of the crystal oscillator Y1 are grounded.

Further, the transmitting end inverter circuit comprises a resistor R11, a resistor R18, a grounding resistor R39-R40, a resistor R44, a resistor R46, a capacitor C1-C3, a grounding capacitor C4-C5, a capacitor C7, a grounding capacitor C8, a capacitor C11-C12, a capacitor C19, a capacitor C36-C37, a grounding capacitor C39-C40, a grounding capacitor C42, a capacitor C43, a port JP1, a port JP4, a power amplification chip U1, an inverter chip U2, a power amplification chip U5 and an inverter chip U7;

the 2 nd pin of the power amplification chip U1 is respectively connected with a grounding capacitor C4, a grounding capacitor C5 and a 5V5 pin of the transmitting end auxiliary power supply circuit; the 3 rd pin and the 9 th pin of the power amplifier chip U1 are grounded; the 8 th pin of the power amplifier chip U1 is connected with one end of the resistor R11; the 1 st pin of the power amplifier chip U1 is connected with one end of a resistor R18; the other end of the resistor R18 is connected with a 5V5 pin of the transmitting end auxiliary power circuit; the 5 th pin of the power amplifier chip U1 is connected with the 5 th pin of the MOS tube N3; the 4 th pin of the power amplification chip U1 is respectively connected with one end of a capacitor C1, one end of a capacitor C2, one end of a capacitor C3, one end of a capacitor C7, one end of a capacitor C11 and one end of a capacitor C19; the 6 th pin of the power amplifier chip U1 is connected with one end of the capacitor C12; the 7 th pin of the power amplification chip U1 is connected with the other end of the capacitor C12; the 1 st pin of the port JP1 is respectively connected with the other end of the capacitor C1, the other end of the capacitor C2, the other end of the capacitor C3, the other end of the capacitor C7, the other end of the capacitor C11 and the other end of the capacitor C19; the 5 th pin of the inversion chip U2 is respectively connected with the grounding capacitor C8 and the +3.3V pin of the transmitting end auxiliary power supply circuit; the 3 rd pin of the inversion chip U2 is grounded; the 1 st pin of the inversion chip U2 is respectively connected with the 1 st pin of the inversion chip U2 and the other end of the resistor R144; the 4 th pin of the inversion chip U2 is connected with the other end of the resistor R11; the 5 th pin of the inversion chip U7 is respectively connected with the grounding capacitor C42 and the +3.3V pin of the transmitting end auxiliary power supply circuit; the 3 rd pin of the inversion chip U7 is grounded; a 4 th pin of the inverter chip U7 and one end of a resistor R44; the 2 nd pin of the inversion chip U7 is connected with the other end of the resistor R144; the 2 nd pin of the power amplification chip U5 is respectively connected with a grounding capacitor C39, a grounding capacitor C40 and a 5V5 pin of the transmitting end auxiliary power supply circuit; the 3 rd pin and the 9 th pin of the power amplifier chip U5 are grounded; the 8 th pin of the power amplifier chip U5 is connected with the other end of the resistor R44; the 1 st pin of the power amplifier chip U5 is connected with one end of a resistor R46; the other end of the resistor R46 is connected with a 5V5 pin of the transmitting end auxiliary power circuit; the 5 th pin of the power amplifier chip U5 is respectively connected with the grounding capacitor C36, the grounding capacitor C37 and the 5 th pin of the MOS tube N3; the 4 th pin of the power amplification chip U5 is connected with the 1 st pin of the port JP 4; the 6 th pin of the power amplifier chip U5 is connected with one end of the capacitor C43; the 7 th pin of the power amplifier chip U5 is connected with the other end of the capacitor C43.

Further, the receiving-end auxiliary power supply circuit comprises a resistor R42, a resistor R77, a resistor R84, grounding resistors R88-R90, grounding capacitors C52-C54, a capacitor C72, grounding capacitors C73-C75, grounding capacitors C87-C91, diodes D9-D10, an inductor L3, a port JP6, a power amplifier chip U11 and voltage stabilizing chips VR5-VR6;

the 1 st pin of the power amplifier chip U11 is connected with one end of the capacitor C72; the 2 nd pin of the power amplifier chip U11 is grounded; the 3 rd pin of the power amplifier chip U11 is respectively connected with one end of the resistor R84, the grounding resistor R89 and the grounding resistor R90; the 4 th pin of the power amplifier chip U11 is respectively connected with the cathode of the diode D10, one end of the resistor R77 and the grounding resistor R88; the 5 th pin of the power amplifier chip U11 is connected with the other end of the resistor R77 and the grounding capacitor C73; the 6 th pin of the power amplifier chip U11 is respectively connected with the other end of the capacitor C72, the negative electrode of the diode D9 and one end of the inductor L3; the other end of the inductor L3 is respectively connected with the other end of the resistor R84, the grounding capacitor C74, the grounding capacitor C75 and the 1 st pin of the port JP6, and the connection point of the inductor L3 is used as the +12V pin of the auxiliary power supply circuit of the receiving end; pin 2 of port JP6, the anode of diode D9 and the anode of diode D10 are all grounded;

the 1 st pin of the voltage stabilizing chip VR5 is grounded; the 2 nd pin of the voltage stabilizing chip VR5 is respectively connected with the grounding capacitor C53, the grounding capacitor C54, the 3 rd pin of the voltage stabilizing chip VR6 and the grounding capacitor C87, and the connection point is used as the +5V pin of the auxiliary power circuit of the receiving end and the test point TP3; the 3 rd pin of the voltage stabilizing chip VR5 is respectively connected with one end of the resistor R42 and the grounding capacitor C52;

The 1 st pin of the voltage stabilizing chip VR6 is grounded; the 2 nd pin of the voltage stabilizing chip VR6 is respectively connected with the grounding capacitor C88, the grounding capacitor C89, the grounding capacitor C90 and the grounding capacitor C91, and the connection point is used as the +3.3V pin of the auxiliary power circuit of the receiving end;

the receiving end communication control circuit comprises a magnetic bead FB4, grounding capacitances C112-C114, capacitors C115-C116, grounding capacitances C118-C122, a grounding capacitance C127, a grounding capacitance C129, a grounding capacitance C132, inductors L7-L8, a crystal oscillator Y2, a port JP10, an antenna A2 and a control chip U22;

the 5 th pin of the control chip U22 is respectively connected with one end of the grounding capacitor C118, the grounding capacitor C119, the grounding capacitor C120, the grounding capacitor C121 and the magnetic bead FB4 and the 18 th pin of the control chip U22; the 6 th pin and the 25 th pin of the control chip U22 are grounded; the 19 th pin of the control chip U22 is connected with one end of the capacitor C115; the other end of the capacitor C115 is connected with one end of the grounding capacitor C112 and one end of the inductor L7 respectively; the other end of the inductor L7 is connected with one end of the grounding capacitor C113 and one end of the inductor L8 respectively; the other end of the inductor L8 is connected with one end of a grounded capacitor C114 and one end of a capacitor C116 respectively; the other end of the capacitor C116 is connected with the 1 st pin of the antenna A2; the 2 nd pin of the antenna A2 is grounded;

The 16 th pin of the control chip U22 is respectively connected with the grounding capacitor C129 and the 3 rd pin of the crystal oscillator Y2; the 17 th pin of the control chip U22 is respectively connected with the grounding capacitor C132 and the 1 st pin of the crystal oscillator Y2; the 2 nd pin and the 4 th pin of the crystal oscillator Y2 are grounded; the 7 th pin of the control chip U22 is connected with the grounding capacitor C122; the 8 th pin of the control chip U22 is connected with the grounding capacitor C127; the 2 nd pin of the port JP10 is connected with the 1 st pin of the control chip U22; pin 3 of port JP10 is grounded; the other end of the magnetic bead FB4 is connected with a +3.3V pin of the auxiliary power supply circuit of the receiving end.

Further, the receiving-end rectifying and filtering circuit comprises a resistor R15, a resistor R22, a grounding resistor R35, a capacitor C6, a capacitor C9, a grounding capacitor C13, a capacitor C14, grounding capacitors C15-C16, a grounding capacitor C18, grounding capacitors C20-C21, grounding capacitors C24-C25, capacitors C26-C27, diodes D1-D2, a diode D4, a diode D6, a MOS tube Q2, a MOS tube Q5 and an inductor L1;

one end of the capacitor C26 is respectively connected with one end of the capacitor C6, one end of the capacitor C9, one end of the capacitor C14 and one end of the capacitor C27, and the connection point is used as a test point TP1; the other end of the capacitor C6 is respectively connected with the other end of the capacitor C9, the other end of the capacitor C14, the anode of the diode D1 and the cathode of the diode D2; the anode of the diode D2 and the anode of the diode D4 are grounded; the other end of the capacitor C26 is respectively connected with the other end of the capacitor C27, the cathode of the diode D4 and the anode of the diode D6, and the connection point is used as a test point TP2; the cathode of the diode D1 is respectively connected with the cathode of the diode D6, the grounding capacitor C24, the grounding capacitor C25, one end of the resistor R15, the drain electrode of the MOS tube Q2 and the other end of the resistor R42; the grid electrode of the MOS tube Q2 is respectively connected with the other end of the resistor R15 and one end of the resistor R22; the other end of the resistor R22 is connected with the drain electrode of the MOS tube Q5; the grid electrode of the MOS tube Q5 is connected with a grounding resistor R35; the source electrode of the MOS tube Q5 is grounded; the source electrode of the MOS tube Q2 is respectively connected with the grounding capacitor C18, the grounding capacitor C20, the grounding capacitor C21, the grounding capacitor C15, one end of the inductor L1 and the 5 th pin of the power amplifier chip U11; the other end of the inductor L1 is connected to the ground capacitor C13 and the ground capacitor C16, respectively.

Further, the receiving end current sampling circuit comprises a grounding resistor R3, resistors R4-R6, resistors R8-R10, resistors R13-R14, a resistor R16, a resistor R20, resistors R23-R26, a resistor R32, grounding resistors R33-R34, grounding resistors R36-R37, a grounding capacitor C28, a diode T1, a MOS tube Q3, a MOS tube Q6-Q8, a port JP2, a MOS tube N1-N2 and a sampling chip U4;

the 1 st pin of the sampling chip U4 is respectively connected with one end of a grounding resistor R33 and one end of a resistor R24; the 2 nd pin of the sampling chip U4 is grounded; the 3 rd pin of the sampling chip U4 is respectively connected with one end of the resistor R10, the grounding capacitor C28, the 5 th pin of the sampling chip U4 and the other end of the inductor L1; the 4 th pin of the sampling chip U4 is respectively connected with the other end of the resistor R10, one end of the resistor R8, one end of the resistor R16, the 1 st pin of the MOS tube N1, the 2 nd pin of the MOS tube N1 and the 3 rd pin of the MOS tube N1; the 4 th pin of the MOS tube N1 is respectively connected with the other end of the resistor R16 and one end of the resistor R23; the 5 th pin, the 6 th pin, the 7 th pin and the 8 th pin of the MOS tube N1 are respectively connected with the 5 th pin, the 6 th pin, the 7 th pin and the 8 th pin of the MOS tube N2 in a one-to-one correspondence manner; the other end of the resistor R8 is respectively connected with one end of the resistor R5 and one end of the resistor R3; the other end of the resistor R5 is connected with a 12 th pin of the control chip U22; the 1 st pin of the MOS tube N2 is respectively connected with the 2 nd pin of the MOS tube N2, the 3 rd pin of the MOS tube N2, the cathode of the diode T2, one end of the resistor R13, one end of the resistor R9, the source electrode of the MOS tube Q3, one end of the resistor R14 and the 1 st pin of the port JP 2; the other end of the resistor R9 is respectively connected with one end of the resistor R6 and the grounding resistor R4; the other end of the resistor R6 is connected with a 13 th pin of the control chip U22; the 4 th pin of the MOS tube N2 is respectively connected with the other end of the resistor R13 and one end of the resistor R20; the other end of the resistor R20 is connected with the drain electrode of the MOS tube Q7; the grid electrode of the MOS tube Q7 is respectively connected with one end of a grounding resistor R37 and one end of a resistor R32; the grid electrode of the MOS tube Q3 is respectively connected with the other end of the resistor R14 and the grounding resistor R26; the drain electrode of the MOS tube Q3 is connected with one end of a resistor R25; the other end of the resistor R25 is connected with the grounding resistor R34 and the grid electrode of the MOS tube Q8 respectively; the source electrode of the MOS tube Q6, the drain electrode of the MOS tube Q8, the source electrode of the MOS tube Q8, the 2 nd pin of the port JP2, the anode of the diode T1 and the source electrode of the MOS tube Q7 are all grounded; the grid electrode of the MOS tube Q6 is connected with a grounding resistor R36; the drain electrode of the MOS tube Q6 is connected with the other end of the resistor R23; the other end of the resistor R24 is connected with the 11 th pin of the control chip U22; the other end of the resistor R32 is connected with the 4 th pin of the control chip U22;

The receiving end temperature sampling circuit comprises a resistor R103, a resistor R106, a resistor R110, a resistor R108 and grounding resistors R113-R114;

one end of the resistor R103 is connected with one end of the resistor R110 and the grounding resistor R113 respectively; the other end of the resistor R103 is connected with the other end of the resistor R42; the other end of the resistor R110 is connected with the 14 th pin of the control chip U22; one end of the resistor R106 is connected with one end of the resistor R108 and the grounding resistor R114 respectively; the other end of the resistor R106 is connected with a +5V pin of the receiving end auxiliary power circuit; the other end of the resistor R108 is connected with the 15 th pin of the control chip U22.

The beneficial effects of the invention are as follows:

(1) The invention provides a magnetic resonance wireless charging system without a switching power supply, which comprises a transmitting end circuit and a receiving end circuit, wherein the transmitting end circuit and the receiving end circuit can adjust working frequency and excitation amplitude. The working frequency and the excitation amplitude of the transmitting-end inverter circuit can be adjusted according to the output voltage and current requirements, and the problem of power overflow of a common wireless charging mode with a switch power supply is solved.

(2) The magnetic resonance wireless charging system provides a more stable and efficient wireless charging or wireless power supply scheme for portable computers, communication products, consumer electronics and LED lighting equipment.

Drawings

Figure 1 is a block diagram of a magnetic resonance wireless charging system;

FIG. 2 is a circuit diagram of a transmitting-side auxiliary power circuit;

FIG. 3 is a circuit diagram of a transmitting-side communication control circuit;

FIG. 4 is a circuit diagram of a transmitting side input circuit;

FIG. 5 is a circuit diagram of a transmitting-side sampling circuit;

FIG. 6 is a circuit diagram of a transmitting-side PWM modulation circuit;

FIG. 7 is a circuit diagram of a transmitting end protection circuit;

FIG. 8 is a circuit diagram of a transmitting-side frequency conversion circuit;

fig. 9 is a circuit diagram of a transmitting-side inverter circuit;

FIG. 10 is a circuit diagram of a receiver side auxiliary power circuit;

FIG. 11 is a circuit diagram of a receiver communication control circuit;

FIG. 12 is a circuit diagram of a receiving-side rectifying and filtering circuit;

FIG. 13 is a circuit diagram of a receiver-side current sampling circuit;

fig. 14 is a circuit diagram of a receiver temperature sampling circuit.

Detailed Description

Embodiments of the present invention are further described below with reference to the accompanying drawings.

As shown in fig. 1, the present invention provides a magnetic resonance wireless charging system without a switching power supply, which comprises a transmitting module and a receiving module connected with each other; the transmitting module and the receiving module are both free of a switching power supply;

the working mode of the magnetic resonance wireless charging system comprises the following steps: adjusting the working frequency of the magnetic resonance wireless charging system according to the output current requirement or the output voltage requirement of the receiving module, adjusting the excitation amplitude of the magnetic resonance wireless charging system according to the output current requirement or the output voltage requirement of the receiving module, and simultaneously adjusting the working frequency and the excitation amplitude of the magnetic resonance wireless charging system according to the output current requirement or the output voltage requirement of the receiving module; to ensure a stable load power.

In the embodiment of the invention, the transmitting module and the receiving module have no switching power supply, and the output power of the transmitting end can be dynamically adjusted according to the output voltage or current requirement of the receiving end so as to ensure stable load power. The working frequency of the system is not fixed, and the system can be adjusted according to the requirement of the output voltage or current of the receiving end; the excitation amplitude of the transmitting end of the system is not fixed, and the excitation amplitude is adjusted according to the requirement of the output voltage or current of the receiving end. When the system works, the working frequency and the excitation amplitude can be adjusted simultaneously according to the requirement of the output voltage or current of the receiving end.

In the embodiment of the invention, as shown in fig. 2, the transmitting-end auxiliary power circuit comprises a grounding resistor R1, a resistor R2, a resistor R7, a resistor R12, a resistor R17, a resistor R19, a grounding resistor R21, grounding resistors R27-R28, a capacitor C10, a grounding capacitor C17, a grounding capacitor C22-C23, a grounding capacitor C29-C35, a grounding capacitor C44-grounding capacitor C51, an inductor L2, a diode D3, a diode D5, a MOS transistor Q1, a MOS transistor Q4, a port JP3, a power chip U3 and voltage stabilizing chips VR1-VR4;

In the embodiment of the invention, the input voltage of the auxiliary power supply circuit at the transmitting end is output to four LDOs through the output voltage of the auxiliary power supply DC-DC circuit, the output of the four LDOs is used for supplying power to other circuits, meanwhile, the output of the auxiliary power supply DC-DC is used for supplying power to a fan, namely JP3 is connected with the fan, the MOS tube Q4 is a switch for supplying power to the fan, and the on-off of the MOS tube Q4 is controlled by the high and low levels given by the MCU of the communication control circuit at the transmitting end to the grid electrode of the MOS tube Q1.

As shown in fig. 3, the transmitting-end communication control circuit includes a magnetic bead FB3, resistors R144-R145, a capacitor C98, ground capacitors C100-C109, ground capacitors C110-C111, a ground capacitor C117, ground capacitors C123-C126, a ground capacitor C128, a ground capacitor C131, a ground capacitor C133, a diode D19, an inductor L4-L6, a crystal oscillator Y3, a control chip U20, and an antenna A1;

In the embodiment of the invention, as shown in fig. 4, the transmitting end input circuit comprises a resistor R54, a resistor R58, resistors R59-R60, a resistor R65, resistors R67-R70, a grounding resistor R72, grounding capacitors C57-C62, a capacitor C64, grounding capacitors C66-C67, a light emitting diode DS1, diodes D7-D8, a diode T2, a MOS transistor N3, a MOS transistor Q11, a MOS transistor Q13 and an input port JP5;

In the embodiment of the invention, in the transmitting end input circuit, power is supplied from a port JP5, the power reaches a switch MOS tube N3 after being input by an input end protection circuit and input filtering, the on-off of N3 is controlled by the high-low level of the grid electrode of the MOS tube Q11, and when the on-condition is not met or the circuit needs to be protected, the MCU of the transmitting end communication control circuit is used for switching off the N3 for the high-low level of the Q11 to protect the subsequent circuit.

As shown in FIG. 5, the transmitting-end sampling circuit comprises resistors R92-R95, resistors R97-R98, grounding resistors R100-R102, grounding capacitors C76-C77 and a sampling chip U14;

In the embodiment of the invention, the transmitting end sampling circuit samples the input voltage, the drain current and the temperature so as to protect the circuit when the parameters exceed the set threshold.

In the embodiment of the invention, as shown in fig. 6, the transmitting-end PWM modulation circuit includes resistors R124-R126, resistors R128-R134, resistors R136-R137, a grounding resistor R138, grounding capacitors C83-C85, a capacitor C86, a grounding capacitor C93, a capacitor C94, grounding capacitors C95-C97, diodes D15-D18, a MOS transistor Q20, an amplifier U17A, an amplifier U17B, an amplifier U18A, and an amplifier U18B;

In the embodiment of the invention, as shown in fig. 7, the transmitting end protection circuit comprises a resistor R55, resistors R146-R147, a grounding resistor R148, resistors R149-R156, a grounding resistor R157, a resistor R160, a grounding resistor R161, resistors R164-R165, resistors R169-R171, a grounding capacitor C63, a grounding capacitor C130, a grounding capacitor C134-C135, a grounding capacitor C137, a diode U24, a triode Q23-Q25, a protection chip U10, an amplifier U23, a protection chip U25 and an amplifier U26-U27;

in the transmitting end protection circuit, a protection chip U10 is used as a voltage comparator, and a reference point of the voltage comparator is modified in real time through a transmitting end PWM (pulse width modulation) circuit so that a reference value and a current sampling value of the voltage comparator are fixed variable quantities; the circuit is more efficiently and quickly protected.

In the embodiment of the invention, the reference point of the voltage comparator in the transmitting end protection circuit is connected with the output of the MCU of the transmitting end communication control circuit after PWM driving through the integrating circuit, the reference point is modified in real time by adjusting PWM, the reference value and the current sampling value are always ensured to be a fixed variable quantity, and the circuit is protected more efficiently and rapidly. The transmitting end protection circuit mainly comprises an overvoltage protection circuit, an overcurrent protection circuit, a self-locking circuit and an unlocking circuit, the voltage of a target point is divided and then compared with the reference voltage of a comparator, the output of the comparator is connected to one input end of the logic circuit, the voltage converted by the current of the target point is compared with the reference voltage of the comparator, the output of the comparator is connected to the other input end of the logic circuit, if overvoltage or overcurrent occurs, the point M2 is low level, the self-locking circuit maintains the low level state, even if the overcurrent or overvoltage state does not exist after self locking, the point M2 still maintains the low level state until the MCU of the transmitting end communication control circuit is unlocked through the unlocking circuit, and the high level state can be restored when the overvoltage or overcurrent does not exist.

In the embodiment of the invention, as shown in FIG. 8, the transmitting end frequency conversion circuit comprises resistors R56-R57, resistors R61-R62, resistor R64, grounding capacitors C55-C56, grounding capacitors C70-C71, a crystal oscillator Y1 and a frequency conversion chip N4;

In the embodiment of the invention, the transmitting end frequency conversion circuit controls the output frequency of the frequency conversion circuit by controlling the duty ratio input by the frequency conversion circuit through the MCU of the transmitting end communication control circuit.

In the embodiment of the invention, as shown in fig. 9, the transmitting-end inverter circuit comprises a resistor R11, a resistor R18, grounding resistors R39-R40, a resistor R44, a resistor R46, capacitors C1-C3, grounding capacitors C4-C5, a capacitor C7, a grounding capacitor C8, capacitors C11-C12, a capacitor C19, capacitors C36-C37, grounding capacitors C39-C40, a grounding capacitor C42, a capacitor C43, a port JP1, a port JP4, a power amplifier chip U1, an inverter chip U2, a power amplifier chip U5 and an inverter chip U7;

In the embodiment of the invention, the working frequency of the inverter circuit is determined by the output of the inverter circuit at the transmitting end, the inverter circuit is output to the input of the logic circuit, and the output of the logic circuit drives the power amplifier chips U1 and U5.

In the embodiment of the invention, as shown in fig. 10, the receiving-end auxiliary power supply circuit comprises a resistor R42, a resistor R77, a resistor R84, grounding resistors R88-R90, grounding capacitors C52-C54, a capacitor C72, grounding capacitors C73-C75, grounding capacitors C87-C91, diodes D9-D10, an inductor L3, a port JP6, a power amplifier chip U11 and voltage stabilizing chips VR5-VR6;

in the embodiment of the invention, the rectified direct current voltage is output by a certain specific voltage value through the DC-DC of the auxiliary power circuit at the receiving end, and the voltage is changed into a smaller voltage value through the LDO to be supplied to other circuits.

As shown in fig. 11, the receiving-end communication control circuit includes a magnetic bead FB4, ground capacitances C112 to C114, capacitances C115 to C116, ground capacitances C118 to C122, ground capacitance C127, ground capacitance C129, ground capacitance C132, inductances L7 to L8, a crystal oscillator Y2, a port JP10, an antenna A2, and a control chip U22;

In the embodiment of the invention, as shown in fig. 12, the receiving-end rectifying and filtering circuit comprises a resistor R15, a resistor R22, a grounding resistor R35, a capacitor C6, a capacitor C9, a grounding capacitor C13, a capacitor C14, grounding capacitors C15-C16, a grounding capacitor C18, grounding capacitors C20-C21, grounding capacitors C24-C25, capacitors C26-C27, diodes D1-D2, a diode D4, a diode D6, a MOS transistor Q2, a MOS transistor Q5 and an inductor L1;

In the embodiment of the invention, the rectifying and filtering circuit receives the energy received by the antenna and the matching circuit, the energy is converted into direct current energy through the rectifying circuit, the direct current energy reaches the switch MOS tube Q2 through the filtering circuit, the switch MOS tube Q2 is controlled to be switched on or off through the logic circuit or the high and low level of the MCU of the communication control circuit at the receiving end is given to the grid electrode of the MOS tube Q5, and then clutter is filtered through the filtering circuit.

In the embodiment of the invention, as shown in fig. 13, the receiving end current sampling circuit comprises a grounding resistor R3, resistors R4-R6, resistors R8-R10, resistors R13-R14, resistor R16, resistor R20, resistors R23-R26, resistor R32, grounding resistors R33-R34, grounding resistors R36-R37, grounding capacitor C28, diode T1, MOS transistor Q3, MOS transistors Q6-Q8, port JP2, MOS transistors N1-N2 and sampling chip U4;

In the embodiment of the invention, the current sampling value and the output voltage sampling value are used as logic judgment conditions in the charging process, and the input level of the grid electrodes of the MOS transistors Q6 and Q7 is controlled by the MCU of the logic or receiving end communication control circuit to control the on-off of the switching MOS transistors N1 and N2.

As shown in fig. 14, the receiving-end temperature sampling circuit includes a resistor R103, a resistor R106, a resistor R110, a resistor R108, and ground resistors R113-R114;

The working principle and the working process of the invention are as follows: according to the technical scheme, on one hand, a switching power supply is removed, and the receiving end and the transmitting end realize real-time data communication by changing the driving frequency of the transmitting end or the amplitude of an excitation source, so that closed-loop control is realized, and the receiving power of the receiving end is accurately controlled. After the receiving and transmitting antenna structure is determined, the capacitance value of the series resonance capacitor is calculated through the expected working frequency, after LC resonance parameters are determined, the frequency of the excitation source is adjusted through the signal source, the frequency of the excitation signal source can be selectively adjusted to the left side and the right side of the hardware resonance frequency, the system can meet the system load within the required charging distance, and then the resonance capacitance value which is highest in efficiency in the whole required charging area and is linearly changed along with the change of the frequency of the excitation source is selected through fine adjustment of the capacitance value of the resonance capacitor. The frequency of the excitation source or the amplitude of the excitation source is changed through the real-time data passing of the receiving end and the transmitting end, and the transmission power and the transmission efficiency are controlled. On the other hand, along with the transmitting and receiving distance transmitting change, the change of conversion efficiency and power can cause the change of the direct current input current of the transmitting end, so as to solve the problem that the wireless charging system moves in the charging process or the transmitting and receiving antenna is closely attached to the electronic device of the receiving end and is damaged by the impact of high voltage and high current, and the input power can be managed through the change of the current of the transmitting end. And the current signal of the transmitting end is sampled, the current sampling signal is compared through a voltage comparator, and when the current sampling signal is higher than a certain value, the voltage comparator output signal turns off the power supply channel of the transmitting end, so that an excitation signal source is cut off to protect a receiving end device. In a wireless charging system, when a reference point of a voltage comparator is a fixed value, the value generally floats by a certain margin according to a maximum current value of a transmitting end when the voltage comparator works at the farthest distance, and when a receiving end does not reach full charge power or a receiving end is close to a transmitting antenna, a larger current change of the transmitting end is required to trigger protection due to higher reference point of the voltage comparator, and at the moment, the protection can fail to reach a threshold value. The reference point of the voltage comparator is connected with the output of the transmitting end communication control circuit MCU after PWM driving passes through the integrating circuit, the reference point is modified in real time by adjusting PWM, and the reference value and the current sampling value are always ensured to be a fixed variable. Therefore, the receiving end device can be effectively prevented from being damaged when the transmitting position changes in a large horizontal degree of freedom and a large vertical transmission distance. The function can also be realized by setting the reference point voltage of the fixed voltage comparator and changing the amplification factor of the sampling circuit of the current transmitting end in real time.

The beneficial effects of the invention are as follows:

Those of ordinary skill in the art will recognize that the embodiments described herein are for the purpose of aiding the reader in understanding the principles of the present invention and should be understood that the scope of the invention is not limited to such specific statements and embodiments. Those of ordinary skill in the art can make various other specific modifications and combinations from the teachings of the present disclosure without departing from the spirit thereof, and such modifications and combinations remain within the scope of the present disclosure.

Claims

1. The magnetic resonance wireless charging system for removing the switching power supply is characterized by comprising a transmitting module and a receiving module which are connected with each other; the transmitting module and the receiving module are both free of a switching power supply;

the transmitting end auxiliary power circuit, the transmitting end sampling circuit, the transmitting end PWM modulation circuit, the transmitting end protection circuit, the transmitting end frequency conversion circuit and the transmitting end inverter circuit are all in communication connection with the transmitting end communication control circuit; the transmitting end input circuit, the transmitting end sampling circuit, the transmitting end PWM modulation circuit, the transmitting end protection circuit, the transmitting end frequency conversion circuit and the transmitting end inverter circuit are all in communication connection with the transmitting end auxiliary power supply module; the transmitting end input circuit is respectively connected with the transmitting end sampling circuit, the transmitting end protection circuit, the transmitting end frequency conversion circuit and the transmitting end inverter circuit in a communication way; the transmitting end protection circuit is respectively connected with the transmitting end PWM modulation circuit and the transmitting end sampling circuit in a communication way;

2. The switched-power-supply-removed magnetic resonance wireless charging system according to claim 1, wherein the transmitting-side auxiliary power supply circuit comprises a grounding resistor R1, a resistor R2, a resistor R7, a resistor R12, a resistor R17, a resistor R19, a grounding resistor R21, grounding resistors R27-R28, a capacitor C10, a grounding capacitor C17, a grounding capacitor C22-C23, a grounding capacitor C29-C35, a grounding capacitor C44-a grounding capacitor C51, an inductor L2, a diode D3, a diode D5, a MOS transistor Q1, a MOS transistor Q4, a port JP3, a power supply chip U3 and a voltage stabilizing chip VR1-VR4;

The 1 st pin of the power chip U3 is connected with one end of the capacitor C10; the 2 nd pin of the power chip U3 and the anode of the diode D5 are grounded; the 3 rd pin of the power chip U3 is respectively connected with one end of a grounding resistor R27, one end of a grounding resistor R28 and one end of a resistor R19; the 4 th pin of the power chip U3 is respectively connected with the cathode of the diode D5, one end of the resistor R17 and the grounding resistor R21; the 5 th pin of the power chip U3 is respectively connected with the other end of the resistor R17 and the grounding capacitor C17; the 6 th pin of the power chip U3 is respectively connected with the cathode of the diode D3, the other end of the capacitor C10 and one end of the inductor L2; the positive electrode of the diode D3 is grounded; the drain electrode of the MOS tube Q4 is connected with the 1 st pin of the port JP 3; the 2 nd pin of the port JP3 is grounded; the grid electrode of the MOS tube Q4 is respectively connected with one end of a resistor R12 and one end of a resistor R7; the drain electrode of the MOS tube Q1 is connected with the other end of the resistor R7; the grid electrode of the MOS tube Q1 is respectively connected with one ends of a grounding resistor R1 and a resistor R2; the source electrode of the MOS tube Q1 is grounded;

the 1 st pin of the voltage stabilizing chip VR1 is respectively connected with the grounding capacitor C31, the grounding capacitor C32, the 3 rd pin of the voltage stabilizing chip VR3, the grounding capacitor C44 and the grounding capacitor C45, and the connection point is used as the 5V5 pin of the auxiliary power circuit of the transmitting end; the 2 nd pin of the voltage stabilizing chip VR1 is grounded; the 3 rd pin of the voltage stabilizing chip VR1 is respectively connected with the other end of the inductor L2, the other end of the resistor R19, the grounding capacitor C22, the grounding capacitor C23, the other end of the resistor R12, the source electrode of the MOS transistor Q4, the grounding capacitor C29, the grounding capacitor C30, the 3 rd pin of the voltage stabilizing chip VR2, the grounding capacitor C33 and the grounding capacitor 34, and the connection point is used as the +12v pin of the auxiliary power circuit of the transmitting end; the 1 st pin of the voltage stabilizing chip VR2 is respectively connected with the grounding capacitor C35, the 3 rd pin of the voltage stabilizing chip VR4, the grounding capacitor C48 and the grounding capacitor C49, and the connection point is used as the +5V pin of the auxiliary power circuit of the transmitting end; the 2 nd pin of the voltage stabilizing chip VR2 is grounded; the 1 st pin of the voltage stabilizing chip VR3 is grounded; the 2 nd pin of the voltage stabilizing chip VR3 is respectively connected with the grounding capacitor C46 and the grounding capacitor C47, and the connection point of the 2 nd pin is used as the +3.3V pin of the auxiliary power circuit of the transmitting end; the 1 st pin of the voltage stabilizing chip VR4 is grounded; the 2 nd pin of the voltage stabilizing chip VR4 is respectively connected with the grounding capacitor C50 and the grounding capacitor C51, and the connection point of the 2 nd pin is used as the 3V3 pin of the auxiliary power circuit of the transmitting end;

The transmitting end communication control circuit comprises a magnetic bead FB3, a resistor R144-R145, a capacitor C98, a grounding capacitor C100-C109, a grounding capacitor C110-C111, a grounding capacitor C117, a grounding capacitor C123-C126, a grounding capacitor C128, a grounding capacitor C131, a grounding capacitor C133, a diode D19, an inductor L4-L6, a crystal oscillator Y3, a control chip U20 and an antenna A1;

the 15 th pin of the control chip U20 is respectively connected with a grounding capacitor C103, a grounding capacitor C104, a grounding capacitor C105, a grounding capacitor C106, a grounding capacitor C107, a grounding capacitor C108, a grounding capacitor C109, the cathode of a diode D19 and one end of a magnetic bead FB 3; the 12 th pin, the 14 th pin and the 49 th pin of the control chip U20 are all grounded; the 13 th pin of the control chip U20 is connected with a grounding capacitor C111; the 19 th pin of the control chip U20 is connected with a grounding capacitor C117; the 18 th pin of the control chip U20 is respectively connected with the grounding capacitor C123, the grounding capacitor C124, the grounding capacitor C125, the grounding capacitor C126 and the 39 th pin of the control chip U20; the 36 th pin of the control chip U20 is respectively connected with one end of a resistor R145 and a grounding capacitor C128; the other end of the resistor R145 is connected with a 3V3 pin of the transmitting end auxiliary power circuit; the 16 th pin of the control chip U20 is connected with one end of the inductor L4; the 17 th pin of the control chip U20 is connected with the other end of the inductor L4; the 37 th pin of the control chip U20 is respectively connected with one end of the inductor L6 and the grounding capacitor C110; the 38 th pin of the control chip U20 is respectively connected with the other end of the inductor L6, one end of the capacitor C98 and the grounding capacitor C100; the other end of the capacitor C98 is connected with one end of the grounding capacitor C101 and one end of the inductor L5 respectively; the other end of the inductor L5 is respectively connected with the grounding capacitor C102 and the 1 st pin of the antenna A1; the 2 nd pin of the antenna A1 is grounded; the 31 st pin of the control chip U20 is connected with one end of the resistor R144; the 40 th pin of the control chip U20 is respectively connected with the grounding capacitor C131 and the 3 rd pin of the crystal oscillator Y3; the 41 st pin of the control chip U20 is respectively connected with the grounding capacitor C133 and the 1 st pin of the crystal oscillator Y3; the 2 nd pin and the 4 th pin of the crystal oscillator Y3 are grounded; the 34 th pin of the control chip U20 is connected with the other end of the resistor R2; the other end of the magnetic bead FB3 is connected with a 3V3 pin of the transmitting end auxiliary power supply circuit.

3. The switched-power-supply-removed magnetic resonance wireless charging system according to claim 2, wherein the transmitting-end input circuit comprises a resistor R54, a resistor R58, a resistor R59-R60, a resistor R65, a resistor R67-R70, a grounding resistor R72, a grounding capacitor C57-C62, a capacitor C64, a grounding capacitor C66-C67, a light emitting diode DS1, a diode D7-D8, a diode T2, a MOS transistor N3, a MOS transistor Q11, a MOS transistor Q13, and an input port JP5;

the 1 st pin of the input port JP5 is respectively connected with one end of a resistor R68, one end of a capacitor C64, the anode of a diode D8 and the source electrode of a MOS tube Q13; the 2 nd pin of the input port JP5 is connected to the negative electrode of the light emitting diode DS1, one end of the resistor R58, one end of the resistor R60, the negative electrode of the diode T2, the ground capacitor C58, the ground capacitor C59, the ground capacitor C60, one end of the resistor R54, and the 5 th pin of the power chip U3, respectively; the anode of the light-emitting diode DS1 is connected with the other end of the resistor R68; the other end of the resistor R58 is respectively connected with the other end of the capacitor C64 and the cathode of the diode D7; the anode of the diode D7 is respectively connected with the cathode of the diode D8, the other end of the resistor R60, one end of the resistor R70, one end of the resistor R67 and the grounding capacitor C66; the anode of the diode T2 is grounded; the other end of the resistor R70 is connected with the grid electrode of the MOS tube Q13; the drain electrode of the MOS tube Q13 is grounded; the other end of the resistor R67 is connected with a grounding capacitor C67; the other end of the resistor R54 is respectively connected with a grounding capacitor C57, one end of the resistor R59, the 1 st pin of the MOS tube N3, the 2 nd pin of the MOS tube N3 and the 3 rd pin of the MOS tube N3; the other end of the resistor R59 is respectively connected with the 4 th pin of the MOS tube N3 and one end of the resistor R65; the other end of the resistor R65 is connected with the drain electrode of the MOS tube Q11; the grid electrode of the MOS tube Q11 is respectively connected with one end of a resistor R69 and a grounding resistor R72; the 5 th pin of the MOS tube N3 is respectively connected with the 6 th pin of the MOS tube N3, the 7 th pin of the MOS tube N3, the 8 th pin of the MOS tube N3, the grounding capacitor C61 and the grounding capacitor C62; the source electrode of the MOS tube Q11 is grounded;

the grounding resistor R100 is respectively connected with one end of the resistor R92 and one end of the resistor R95; the grounding resistor R101 is respectively connected with one end of the resistor R93 and one end of the resistor R97; the 1 st pin of the sampling chip U14 is respectively connected with one end of a grounding resistor R102 and one end of a resistor R94 and one end of a resistor R98; the 2 nd pin of the sampling chip U14 is grounded; the 3 rd pin of the sampling chip U14 is connected with the 2 nd pin of the input port JP 5; the 4 th pin of the sampling chip U14 is connected with the other end of the resistor R54; the 5 th pin of the sampling chip U14 is respectively connected with a grounding capacitor C76, a grounding capacitor C77 and a +5V pin of the transmitting end auxiliary power supply circuit; the other end of the resistor R92 is connected with the 5 th pin of the power chip U3; the other end of the resistor R93 is connected with a 5V5 pin of the transmitting end auxiliary power circuit; the other end of the resistor R98 is connected with the 11 th pin of the control chip U20; the other end of the resistor R95 is connected with the 10 th pin of the control chip U20; the other end of the resistor R97 is connected with the 33 rd pin of the control chip U20.

4. The switched-power-supply-removed magnetic resonance wireless charging system as claimed in claim 3, wherein the transmitting-side PWM modulation circuit comprises resistors R124-R126, resistors R128-R134, resistors R136-R137, ground resistor R138, ground capacitor C83-C85, capacitor C86, ground capacitor C93, capacitor C94, ground capacitor C95-C97, diodes D15-D18, MOS transistor Q20, amplifier U17A, amplifier U17B, amplifier U18A, and amplifier U18B;

one end of the resistor R137 is connected with the grid electrode of the MOS tube Q20; the other end of the resistor R137 is connected with the 32 nd pin of the control chip U20; the source electrode of the MOS tube Q20 is grounded; the drain electrode of the MOS tube Q20 is respectively connected with one end of a resistor R126, one end of a grounding resistor R138 and one end of a resistor R133; the other end of the resistor R133 is respectively connected with one end of the capacitor C86 and one end of the resistor R134; the 5 th pin of the amplifier U17B is respectively connected with the other ends of the grounding capacitor C97 and the resistor R134; the 6 th pin of the amplifier U17B is respectively connected with the other end of the capacitor C86 and one end of the resistor R125; the 7 th pin of the amplifier U17B is respectively connected with the other end of the resistor R125 and one end of the resistor R132; the 3 rd pin of the amplifier U17A is connected with the other end of the resistor R132; the 2 nd pin of the amplifier U17A is connected with one end of a resistor R124; the 1 st pin of the amplifier U17A is respectively connected with the other end of the resistor R124 and one end of the resistor R128; the other end of the resistor R128 is respectively connected with one end of the grounding capacitor C95, one end of the grounding capacitor C96 and one end of the resistor R129; the 8 th pin of the amplifier U17A is respectively connected with the 5V5 pin of the transmitting end auxiliary power circuit and the grounding capacitor C85; the 4 th pin of the amplifier U17A is grounded; the other end of the resistor R126 is connected with a 5V5 pin of the transmitting-end auxiliary power circuit; the 5 th pin of the amplifier U18B is respectively connected with one end of a resistor R130 and a grounding capacitor C93; the 6 th pin of the amplifier U18B is respectively connected with one end of the capacitor C94, the 7 th pin of the amplifier U18B and the 3 rd pin of the amplifier U18A; the other end of the resistor R130 is connected with the other end of the capacitor C94 and the other end of the resistor R129; the 2 nd pin of the amplifier U18A is respectively connected with the 1 st pin of the amplifier U18A, one end of the resistor R131 and one end of the resistor R136; the 8 th pin of the amplifier U18A is respectively connected with a grounding capacitor C183, a grounding capacitor C184 and a 5V5 pin of the transmitting end auxiliary power supply circuit; the 4 th pin of the amplifier U18A is grounded; the other end of the resistor R131 is respectively connected with the 21 st pin of the control chip U20 and the anode of the diode D15; the cathode of the diode D15 is connected with the anode of the diode D16; the cathode of the diode D16 is connected with the anode of the diode D17; the cathode of the diode D17 is connected to the anode of the diode D18.

5. The system of claim 4, wherein the transmit side protection circuit comprises resistor R55, resistor R146-R147, ground resistor R148, resistor R149-R156, ground resistor R157, resistor R160, ground resistor R161, resistor R164-R165, resistor R169-R171, ground capacitor C63, ground capacitor C130, ground capacitor C134-C135, ground capacitor C137, diode U24, transistor Q23-Q25, protection chip U10, amplifier U23, protection chip U25, and amplifier U26-U27;

in the transmitting end protection circuit, a protection chip U10 is used as a voltage comparator, and a reference point of the voltage comparator is modified in real time through a transmitting end PWM (pulse-width modulation) circuit so that a reference value and a current sampling value of the voltage comparator are fixed variable quantities; the circuit is more efficiently and quickly protected,

the 2 nd pin of the protection chip U10 is respectively connected with one end of the resistor R55 and the 20 th pin of the control chip U20; the 3 rd pin of the protection chip U10 is grounded; the 5 th pin of the protection chip U10 is respectively connected with the ground capacitor C63, the other end of the resistor R55 and the 3V3 pin of the transmitting end auxiliary power circuit; the 1 st pin of the amplifier U23 is respectively connected with one end of the resistor R152, the 1 st pin of the diode U24 and the 2 nd pin of the diode U24; the other end of the resistor R152 is connected with a 5V5 pin of the transmitting end auxiliary power circuit; the 2 nd pin of the amplifier U23 is grounded; the 3 rd pin of the amplifier U23 is respectively connected with one end of a resistor R147 and a grounding resistor R148; the 3 rd pin of the diode U24 is grounded; the 4 th pin of the amplifier U23 is connected with one end of a resistor R149; the 5 th pin of the amplifier U23 is respectively connected with the 5V5 pin of the transmitting end auxiliary power circuit and the grounding capacitor C130; the other end of the resistor R147 is connected with the 5 th pin of the power chip U3; the other end of the resistor R149 is connected with the 4 th pin of the protection chip U10; the 1 st pin of the protection chip U25 is respectively connected with the 4 th pin of the protection chip U10 and one end of the resistor R150; the 3 rd pin of the protection chip U25 is grounded; the 4 th pin of the protection chip U25 is connected with one end of the resistor R154; the 5 th pin of the protection chip U25 is respectively connected with the ground capacitor C134, the other end of the resistor R150 and the +3.3V pin of the emission end auxiliary power supply circuit; the 1 st pin of the amplifier U27 is connected with the other end of the resistor R94; the 2 nd pin of the amplifier U27 is grounded; the 3 rd pin of the amplifier U27 is connected with one end of a resistor R170; the other end of the resistor R170 is connected with the cathode of the diode D18; the 4 th pin of the amplifier U27 is connected with one end of a resistor R169; the 5 th pin of the amplifier U27 is respectively connected with the 5V5 pin of the transmitting end auxiliary power circuit and the grounding capacitor C137; the other end of the resistor R154 is respectively connected with the other end of the resistor R169, one end of the resistor R171, one end of the resistor R153, the collector of the triode Q24 and the other end of the resistor R69; the other end of the resistor R171 is connected with the 23 rd pin of the control chip U20; the other end of the resistor R153 is respectively connected with one end of the resistor R151 and the base electrode of the triode Q23; the other end of the resistor R151 is connected with a +3.3V pin of the auxiliary power circuit of the transmitting end and one end of the resistor R146 respectively; the other end of the resistor R146 is connected with the emitter of the triode Q23; the collector of the triode Q23 is connected with one end of a resistor R155; the other end of the resistor R155 is respectively connected with the collector electrode of the triode Q25, the grounding resistor R157 and the base electrode of the triode Q24; the emitter of the triode Q24 and the emitter of the triode Q25 are grounded; the base electrode of the triode Q25 is respectively connected with one end of a grounding resistor R161 and one end of a resistor R156; the other end of the resistor R156 is connected with the 35 th pin of the control chip U20; the 1 st pin of the amplifier U26 is connected with the other end of the resistor R164; the 2 nd pin of the amplifier U26 is grounded; the 3 rd pin of the amplifier U26 is connected with the other end of the resistor R94; the 4 th pin of the amplifier U26 is connected with one end of a resistor R160; the 5 th pin of the amplifier U26 is respectively connected with the 5V5 pin of the transmitting end auxiliary power circuit and the grounding capacitor C135; the other end of the resistor R160 is respectively connected with one end of the resistor R165 and the 2 nd pin of the protection chip U25; the other end of the resistor R165 is connected with the 23 rd pin of the control chip U20; the other end of the resistor R64 is connected with the other end of the resistor R136.

6. The magnetic resonance wireless charging system without switching power supply according to claim 3, wherein the transmitting end frequency conversion circuit comprises resistors R56-R57, resistors R61-R62, resistor R64, grounding capacitors C55-C56, grounding capacitors C70-C71, crystal oscillator Y1 and frequency conversion chip N4;

7. The system of claim 3, wherein the transmitting side inverter circuit comprises a resistor R11, a resistor R18, a grounding resistor R39-R40, a resistor R44, a resistor R46, a capacitor C1-C3, a grounding capacitor C4-C5, a capacitor C7, a grounding capacitor C8, a capacitor C11-C12, a capacitor C19, a capacitor C36-C37, a grounding capacitor C39-C40, a grounding capacitor C42, a capacitor C43, a port JP1, a port JP4, a power amplifier chip U1, an inverter chip U2, a power amplifier chip U5, and an inverter chip U7;

the 2 nd pin of the power amplification chip U1 is respectively connected with a grounding capacitor C4, a grounding capacitor C5 and a 5V5 pin of the transmitting end auxiliary power supply circuit; the 3 rd pin and the 9 th pin of the power amplifier chip U1 are grounded; the 8 th pin of the power amplifier chip U1 is connected with one end of the resistor R11; the 1 st pin of the power amplifier chip U1 is connected with one end of the resistor R18; the other end of the resistor R18 is connected with a 5V5 pin of the transmitting end auxiliary power circuit; the 5 th pin of the power amplifier chip U1 is connected with the 5 th pin of the MOS tube N3; the 4 th pin of the power amplification chip U1 is respectively connected with one end of a capacitor C1, one end of a capacitor C2, one end of a capacitor C3, one end of a capacitor C7, one end of a capacitor C11 and one end of a capacitor C19; the 6 th pin of the power amplifier chip U1 is connected with one end of the capacitor C12; the 7 th pin of the power amplification chip U1 is connected with the other end of the capacitor C12; the 1 st pin of the port JP1 is respectively connected with the other end of the capacitor C1, the other end of the capacitor C2, the other end of the capacitor C3, the other end of the capacitor C7, the other end of the capacitor C11 and the other end of the capacitor C19; the 5 th pin of the inversion chip U2 is respectively connected with a grounding capacitor C8 and a +3.3V pin of the transmitting end auxiliary power supply circuit; the 3 rd pin of the inversion chip U2 is grounded; the 1 st pin of the inversion chip U2 is respectively connected with the 1 st pin of the inversion chip U2 and the other end of the resistor R144; the 4 th pin of the inversion chip U2 is connected with the other end of the resistor R11; the 5 th pin of the inversion chip U7 is respectively connected with a grounding capacitor C42 and a +3.3V pin of the transmitting end auxiliary power supply circuit; the 3 rd pin of the inversion chip U7 is grounded; a 4 th pin of the inverter chip U7 and one end of a resistor R44; the 2 nd pin of the inversion chip U7 is connected with the other end of the resistor R144; the 2 nd pin of the power amplification chip U5 is respectively connected with a grounding capacitor C39, a grounding capacitor C40 and a 5V5 pin of the transmitting end auxiliary power supply circuit; the 3 rd pin and the 9 th pin of the power amplifier chip U5 are grounded; the 8 th pin of the power amplifier chip U5 is connected with the other end of the resistor R44; the 1 st pin of the power amplifier chip U5 is connected with one end of the resistor R46; the other end of the resistor R46 is connected with a 5V5 pin of the transmitting end auxiliary power circuit; the 5 th pin of the power amplification chip U5 is respectively connected with the grounding capacitor C36, the grounding capacitor C37 and the 5 th pin of the MOS tube N3; the 4 th pin of the power amplification chip U5 is connected with the 1 st pin of the port JP 4; the 6 th pin of the power amplifier chip U5 is connected with one end of the capacitor C43; and the 7 th pin of the power amplification chip U5 is connected with the other end of the capacitor C43.

8. The system of claim 1, wherein the receiver side auxiliary power circuit comprises a resistor R42, a resistor R77, a resistor R84, ground resistors R88-R90, ground capacitors C52-C54, a capacitor C72, ground capacitors C73-C75, ground capacitors C87-C91, diodes D9-D10, an inductor L3, a port JP6, a power amplifier chip U11, and a voltage regulator chip VR5-VR6;

the 1 st pin of the power amplifier chip U11 is connected with one end of the capacitor C72; the 2 nd pin of the power amplifier chip U11 is grounded; the 3 rd pin of the power amplifier chip U11 is respectively connected with one end of the resistor R84, the grounding resistor R89 and the grounding resistor R90; the 4 th pin of the power amplifier chip U11 is respectively connected with the cathode of the diode D10, one end of the resistor R77 and the grounding resistor R88; the 5 th pin of the power amplifier chip U11 is connected with the other end of the resistor R77 and the grounding capacitor C73; the 6 th pin of the power amplification chip U11 is respectively connected with the other end of the capacitor C72, the negative electrode of the diode D9 and one end of the inductor L3; the other end of the inductor L3 is respectively connected with the other end of the resistor R84, the grounding capacitor C74, the grounding capacitor C75 and the 1 st pin of the port JP6, and the connection point of the inductor L3 is used as the +12V pin of the auxiliary power supply circuit of the receiving end; the 2 nd pin of the port JP6, the anode of the diode D9 and the anode of the diode D10 are all grounded;

the 1 st pin of the voltage stabilizing chip VR6 is grounded; the 2 nd pin of the voltage stabilizing chip VR6 is respectively connected with a grounding capacitor C88, a grounding capacitor C89, a grounding capacitor C90 and a grounding capacitor C91, and the connection point is used as a +3.3V pin of the auxiliary power circuit of the receiving end;

the receiving end communication control circuit comprises a magnetic bead FB4, grounding capacitances C112-C114, capacitors C115-C116, grounding capacitances C118-C122, grounding capacitance C127, grounding capacitance C129, grounding capacitance C132, inductors L7-L8, a crystal oscillator Y2, a port JP10, an antenna A2 and a control chip U22;

the 5 th pin of the control chip U22 is respectively connected with the grounding capacitor C118, the grounding capacitor C119, the grounding capacitor C120, the grounding capacitor C121 and one end of the magnetic bead FB4 and the 18 th pin of the control chip U22; the 6 th pin and the 25 th pin of the control chip U22 are grounded; the 19 th pin of the control chip U22 is connected with one end of the capacitor C115; the other end of the capacitor C115 is connected with one end of the grounding capacitor C112 and one end of the inductor L7 respectively; the other end of the inductor L7 is connected with one end of the grounding capacitor C113 and one end of the inductor L8 respectively; the other end of the inductor L8 is connected with one end of a grounded capacitor C114 and one end of a capacitor C116 respectively; the other end of the capacitor C116 is connected with the 1 st pin of the antenna A2; the 2 nd pin of the antenna A2 is grounded;

The 16 th pin of the control chip U22 is respectively connected with the grounding capacitor C129 and the 3 rd pin of the crystal oscillator Y2; the 17 th pin of the control chip U22 is respectively connected with the grounding capacitor C132 and the 1 st pin of the crystal oscillator Y2; the 2 nd pin and the 4 th pin of the crystal oscillator Y2 are grounded; the 7 th pin of the control chip U22 is connected with the grounding capacitor C122; the 8 th pin of the control chip U22 is connected with a grounding capacitor C127; the 2 nd pin of the port JP10 is connected with the 1 st pin of the control chip U22; the 3 rd pin of the port JP10 is grounded; the other end of the magnetic bead FB4 is connected with a +3.3V pin of the auxiliary power supply circuit of the receiving end.

9. The system of claim 8, wherein the receive-side rectifying and filtering circuit comprises a resistor R15, a resistor R22, a grounding resistor R35, a capacitor C6, a capacitor C9, a grounding capacitor C13, a capacitor C14, grounding capacitors C15-C16, a grounding capacitor C18, grounding capacitors C20-C21, grounding capacitors C24-C25, capacitors C26-C27, diodes D1-D2, a diode D4, a diode D6, a MOS transistor Q2, a MOS transistor Q5, and an inductor L1;

one end of the capacitor C26 is respectively connected with one end of the capacitor C6, one end of the capacitor C9, one end of the capacitor C14 and one end of the capacitor C27, and the connection point is used as a test point TP1; the other end of the capacitor C6 is respectively connected with the other end of the capacitor C9, the other end of the capacitor C14, the anode of the diode D1 and the cathode of the diode D2; the anode of the diode D2 and the anode of the diode D4 are grounded; the other end of the capacitor C26 is respectively connected with the other end of the capacitor C27, the cathode of the diode D4 and the anode of the diode D6, and the connection point is used as a test point TP2; the cathode of the diode D1 is respectively connected with the cathode of the diode D6, the grounding capacitor C24, the grounding capacitor C25, one end of the resistor R15, the drain electrode of the MOS tube Q2 and the other end of the resistor R42; the grid electrode of the MOS tube Q2 is respectively connected with the other end of the resistor R15 and one end of the resistor R22; the other end of the resistor R22 is connected with the drain electrode of the MOS tube Q5; the grid electrode of the MOS tube Q5 is connected with a grounding resistor R35; the source electrode of the MOS tube Q5 is grounded; the source electrode of the MOS tube Q2 is respectively connected with the grounding capacitor C18, the grounding capacitor C20, the grounding capacitor C21, the grounding capacitor C15, one end of the inductor L1 and the 5 th pin of the power amplifier chip U11; the other end of the inductor L1 is connected to a grounding capacitor C13 and a grounding capacitor C16, respectively.

10. The system of claim 8, wherein the receiving-side current sampling circuit comprises a grounding resistor R3, resistors R4-R6, resistors R8-R10, resistors R13-R14, resistor R16, resistor R20, resistors R23-R26, resistor R32, grounding resistors R33-R34, grounding resistors R36-R37, grounding capacitor C28, diode T1, MOS transistor Q3, MOS transistors Q6-Q8, port JP2, MOS transistors N1-N2, and sampling chip U4;

the 1 st pin of the sampling chip U4 is respectively connected with one end of a grounding resistor R33 and one end of a resistor R24; the 2 nd pin of the sampling chip U4 is grounded; the 3 rd pin of the sampling chip U4 is respectively connected with one end of the resistor R10, the grounding capacitor C28, the 5 th pin of the sampling chip U4 and the other end of the inductor L1; the 4 th pin of the sampling chip U4 is respectively connected with the other end of the resistor R10, one end of the resistor R8, one end of the resistor R16, the 1 st pin of the MOS tube N1, the 2 nd pin of the MOS tube N1 and the 3 rd pin of the MOS tube N1; the 4 th pin of the MOS tube N1 is respectively connected with the other end of the resistor R16 and one end of the resistor R23; the 5 th pin, the 6 th pin, the 7 th pin and the 8 th pin of the MOS tube N1 are respectively connected with the 5 th pin, the 6 th pin, the 7 th pin and the 8 th pin of the MOS tube N2 in a one-to-one correspondence manner; the other end of the resistor R8 is connected with one end of the resistor R5 and one end of the resistor R3 respectively; the other end of the resistor R5 is connected with a 12 th pin of the control chip U22; the 1 st pin of the MOS tube N2 is respectively connected with the 2 nd pin of the MOS tube N2, the 3 rd pin of the MOS tube N2, the cathode of the diode T2, one end of the resistor R13, one end of the resistor R9, the source electrode of the MOS tube Q3, one end of the resistor R14 and the 1 st pin of the port JP 2; the other end of the resistor R9 is connected with one end of the resistor R6 and the grounding resistor R4 respectively; the other end of the resistor R6 is connected with a 13 th pin of the control chip U22; the 4 th pin of the MOS tube N2 is respectively connected with the other end of the resistor R13 and one end of the resistor R20; the other end of the resistor R20 is connected with the drain electrode of the MOS tube Q7; the grid electrode of the MOS tube Q7 is respectively connected with one end of a grounding resistor R37 and one end of a resistor R32; the grid electrode of the MOS tube Q3 is respectively connected with the other end of the resistor R14 and the grounding resistor R26; the drain electrode of the MOS tube Q3 is connected with one end of a resistor R25; the other end of the resistor R25 is connected with the grounding resistor R34 and the grid electrode of the MOS tube Q8 respectively; the source electrode of the MOS tube Q6, the drain electrode of the MOS tube Q8, the source electrode of the MOS tube Q8, the 2 nd pin of the port JP2, the anode of the diode T1 and the source electrode of the MOS tube Q7 are all grounded; the grid electrode of the MOS tube Q6 is connected with a grounding resistor R36; the drain electrode of the MOS tube Q6 is connected with the other end of the resistor R23; the other end of the resistor R24 is connected with the 11 th pin of the control chip U22; the other end of the resistor R32 is connected with the 4 th pin of the control chip U22;

one end of the resistor R103 is connected with one end of the resistor R110 and the grounding resistor R113 respectively; the other end of the resistor R103 is connected with the other end of the resistor R42; the other end of the resistor R110 is connected with the 14 th pin of the control chip U22; one end of the resistor R106 is connected with one end of the resistor R108 and the grounding resistor R114 respectively; the other end of the resistor R106 is connected with a +5V pin of the auxiliary power circuit of the receiving end; the other end of the resistor R108 is connected with the 15 th pin of the control chip U22.