CN112383155A - Little micropower wireless charging device based on magnetic resonance coupling - Google Patents
Little micropower wireless charging device based on magnetic resonance coupling Download PDFInfo
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- H—ELECTRICITY
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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Abstract
The invention provides a magnetic resonance coupling-based small micropower wireless charging device, which belongs to the technical field of magnetic resonance coupling wireless charging and comprises a magnetic resonance transmitting module and a magnetic resonance receiving module connected with the magnetic resonance transmitting module, wherein the magnetic resonance transmitting module adopts an E-type differential power amplifier, so that the electromagnetic interference generated by the power amplifier can be obviously reduced, and the output ripple of a receiving circuit is reduced. The magnetic resonance wireless charging system solves the technical problems of large system circuit volume, large power consumption, low efficiency, poor stability, serious interference, serious heating and the like in the existing magnetic resonance wireless charging design scheme which can be used for wireless charging of small and micro-power small-sized electronic equipment, and meets the use scenes of small and micro-power low-voltage power supply, low ripple, large current output and miniaturization.
Description
Technical Field
The invention belongs to the technical field of magnetic resonance coupling wireless charging, and particularly relates to a magnetic resonance coupling-based small micropower wireless charging device.
Background
Along with the continuous development of scientific and technological innovation and internet technology, the popularization and application of consumer electronics, intelligent home systems and internet of things products do not leave to use the power, traditional electrical apparatus and electronic equipment adopt wired power supply direct power supply and built-in battery usually, and wired power supply uses the power supply line not only to occupy the space complicacy, has also brought certain potential safety hazard simultaneously. The equipment powered by the built-in battery has short standby time and needs to be charged for many times, so that the use experience of a user is greatly influenced. The wireless charging technology is used in various electronic applications, and research and application of the wireless charging technology also become a new direction of scientific and technological applications and academia at home and abroad.
Currently, wireless charging technologies recognized in the industry are mainly classified into three categories, one is the QI standard mainly pushed by the WPC alliance and is also called as an magnetic induction coupling technology, the other is the magnetic resonance coupling technology mainly pushed by the Airfuel alliance and is also an electromagnetic radiation type wireless energy transmission technology. Compared with a magnetic induction technology, the magnetic resonance coupling technology has obvious advantages in charging distance, spatial degree of freedom, one-to-many charging and power expansion; compared with the 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, this technique has been applied to intelligence gradually and has been dressed, sweep equipment such as robot, AGV, intelligent lock in, gives the wireless function of charging of equipment to improve equipment's security and intelligent degree, promote user's use and experience. In addition, the application of the magnetic resonance coupling technology in the field of smart home will also subvert the use modes of traditional household appliances, mobile communication equipment and consumer electronics, a residence is used as a platform, all power lines in a home living area are thoroughly removed by utilizing a magnetic resonance wireless charging technology, a hidden wiring technology and an automatic control technology, wireless charging or continuous electric energy supply is carried out on the equipment, the safety, the convenience and the comfort of home are improved, and a high-efficiency, environment-friendly and energy-saving living environment is constructed.
At present, the power supply voltage of wireless charging equipment with small micropower is limited, the current required by a load is large and can reach 300mA to 500mA, and the equipment has higher requirements on transmission efficiency, heat generation, electromagnetic interference, ripple waves, circuit size and the like. The design scheme of single-channel transmitting and single-channel receiving adopted by the magnetic resonance wireless charging design for the small micro-power electronic equipment disclosed at present has the following disadvantages: (1) the power supply voltage required by the single-path power amplifier circuit is higher, the power required to be carried by the single-path power amplifier circuit is higher, and the power amplifier circuit has larger volume and cannot meet the requirement of miniaturization; (2) the EMI problems such as harmonic waves and the like of a single-path power amplifier circuit system are difficult to control, so that ripples generated after the receiving end rectifies and stabilizes voltage are large, and the normal work of load equipment is influenced; (3) the single-path power amplifier has limited output power, serious heating and low efficiency, and is difficult to meet the application scenes of low-voltage input at a small micro-power amplifier end and large-current load at a receiving end; (4) the single-path receiving rectification voltage stabilizing circuit has the advantages of large area, low rectification voltage stabilizing efficiency and serious heat generation.
Disclosure of Invention
Aiming at the defects in the prior art, the magnetic resonance coupling-based small micropower wireless charging device provided by the invention solves the technical problems of large system circuit size, large power consumption, low efficiency, poor stability, serious interference, serious heating and the like in the conventional magnetic resonance wireless charging design scheme which can be used for wireless charging of small micropower small electronic equipment.
In order to achieve the above purpose, the invention adopts the technical scheme that:
the scheme provides a magnetic resonance coupling-based small micropower wireless charging device which comprises a magnetic resonance transmitting module and a magnetic resonance receiving module connected with the magnetic resonance transmitting module;
the magnetic resonance transmitting module comprises a wireless communication module host, a frequency source, a radio frequency power amplifying circuit, a magnetic resonance coupling transmitting antenna and a power supply converting circuit; the frequency source is connected with the radio frequency power amplification circuit, and the radio frequency power amplification circuit is connected with the magnetic resonance coupling transmitting antenna; the wireless communication module host is respectively connected with the frequency source, the power supply conversion circuit and the magnetic resonance receiving module; the power supply conversion circuit provides power supply for the magnetic resonance emission module, and the power supply conversion circuit provides electric voltage for the frequency source, the radio frequency power amplification circuit and the wireless communication module host respectively;
the magnetic resonance receiving module comprises a plurality of paths of magnetic resonance coupling receiving antennas, a plurality of paths of rectifying and voltage stabilizing circuits, a wireless communication module slave machine, a power supply management module, an electromagnetic shielding isolation module, a load and a battery; the multi-path rectification voltage stabilizing circuit is connected with the power supply management module, the power supply management module is connected with the load and the battery, and the electromagnetic shielding isolation module is arranged between the multi-path magnetic resonance coupling receiving antenna and the multi-path rectification voltage stabilizing circuit; the wireless communication module slave machine is in bidirectional communication connection with the wireless communication module host machine; the multi-path magnetic resonance coupling receiving antenna and the multi-path rectification voltage stabilizing circuit are both of a multi-layer stacked structure.
Furthermore, the wireless communication module host and the wireless communication module slave have the same structure and comprise a communication chip U3, and the PWM3 pin, the PWM4 pin and the PWM2 pin of the chip U3 are respectively connected with the power conversion circuit; the PWM5 pin of the chip U3 is connected to the frequency source, the VDD3 pin of the chip U3 is connected to the AVDD3 pin of the chip U3, one end of the capacitor C47, one end of the capacitor C46, one end of the capacitor C45, one end of the capacitor C44, and a power conversion circuit, the other end of the capacitor C44, and the other end of the capacitor C44 are connected to ground, the DVSS pin of the chip U44 is connected to the ePAD pin of the chip U44 and to ground, the dddvdec pin of the chip U44 is connected to one end of the capacitor C44, the VDDDEC _ F pin of the chip U44 is connected to one end of the capacitor C44, the other end of the capacitor C44 is connected to ground, the ANT pin of the chip U44 is connected to one end of the capacitor C44, the inductor L44 is connected to the inductor L44, and the inductor L44 are connected to one end of the capacitor C44, the other end of the inductor L12 is connected with one end of a grounded capacitor C51 and one end of a capacitor C48 respectively, the other end of the capacitor C48 is connected with one end of an antenna A1, the other end of the antenna A1 is grounded, an XC2 pin of a chip U3 is connected with one end of the capacitor C54 and a 2 nd pin of a crystal Y1 respectively, an XC1 pin of the chip U3 is connected with A3 rd pin of the crystal Y1 and one end of the capacitor C55 respectively, the other end of the capacitor C55 is connected with a 2 nd pin of the crystal Y1 and the other end of the capacitor C54 respectively and is grounded, and the other end of the capacitor C54 is connected with a 4 th pin of the crystal Y1.
Still further, the frequency source comprises an active crystal X1, and an EN/NC pin of the active crystal X1 is connected with a PWM5 pin; the VCC pin of active crystal X1 is connected with grounded capacitance C12, grounded resistance R11's one end and resistance R10's one end respectively, resistance R10's the other end and power conversion circuit are connected, active crystal X1's ground terminal ground connection, active crystal X1's OUT pin is connected with resistance R12's one end, resistance R12's the other end is connected with capacitance C13's one end and grounded capacitance C34 respectively, capacitance C13's the other end respectively with radio frequency power amplifier circuit connects.
Furthermore, the radio frequency power amplifying circuit is an E-type differential power amplifier, and the radio frequency power amplifying circuit includes a driving circuit U4, a logic gate circuit U5, a logic gate circuit U6, a power amplifier tube Q1, and a power amplifier tube Q2;
the positive phase end of the logic gate circuit U5 is respectively connected with the other end of the capacitor C13 and the reverse phase end of the logic gate circuit U5, the grounding end of the logic gate circuit U5 is grounded, the power supply end of the logic gate circuit U5 is respectively connected with the grounding capacitor C33 and the power supply conversion circuit, and the output end of the logic gate circuit U5 is connected with the driving circuit U4;
the positive phase end of the logic gate circuit U6 is connected with the other end of the capacitor C13, the reverse phase end of the logic gate circuit U6 is respectively connected with one end of a grounded capacitor C16 and one end of a resistor R2, the other end of the resistor R2 is connected with a power conversion circuit, the grounding end of the logic gate circuit U6 is grounded, the power supply end of the logic gate circuit U6 is respectively connected with the grounded capacitor C17 and the power conversion circuit, and the output end of the logic gate circuit U6 is connected with the driving circuit U4;
the ENA pin of the driving circuit U4 is connected with a power conversion circuit, the INA pin of the driving circuit U4 is connected with the output end of the logic gate circuit U5, the ground end of the driving circuit U4 is grounded, the INB pin of the driving circuit U4 is connected with the output end of the logic gate circuit U6, the ENB pin of the driving circuit U4 is connected with the power conversion circuit, the OUTA pin of the driving circuit U4 is connected with one end of a resistor R4, the other end of the resistor R4 is connected with one end of an inductor L1, the other end of the inductor L1 is connected with the gate of the power amplifier Q1, the VDD pin of the driving circuit U4 is connected with the power conversion circuit, one end of a capacitor C15 and one end of a capacitor C14, the other end of the capacitor C14 is connected with the other end of a capacitor C15 and grounded, the OUTB pin of the driving circuit U4 is connected with one end of a resistor R5, the other end of the resistor R5 is connected with one end of an inductor L2, the other end of the inductor L2 is connected with a gate of a power amplifier tube Q2;
the source of the power amplifier tube Q1 is grounded, the drain of the power amplifier tube Q1 is connected to one end of an inductor L3, one end of a grounded capacitor C20 and one end of an inductor L5, the other end of the inductor L5 is connected to one end of a capacitor C22, the other end of the capacitor C22 is connected to one end of the inductor L6, the other end of the inductor L6 is connected to the grounded capacitor C24, the grounded capacitor C10 and the 1 st pin of the radio frequency output J3, the other end of the inductor L3 is connected to one end of a grounded capacitor C3, a grounded capacitor C2, a grounded capacitor C1, a grounded capacitor C28, one end of an inductor L9 and one end of a resistor R8, and the other end of the resistor R8 is connected to the other end of the inductor L9 and the power conversion circuit;
the source of the power amplifier tube Q2 is grounded, the drain of the power amplifier tube Q2 is connected to one end of an inductor L7, one end of a grounded capacitor C21 and one end of an inductor L4, the other end of the inductor L7 is connected to one end of a capacitor C26, the other end of the capacitor C26 is connected to one end of the inductor L8, the other end of the inductor L8 is connected to the grounded capacitor C27, the grounded capacitor C11 and the 3 rd pin of the rf output J3, the other end of the inductor L4 is connected to one end of a grounded capacitor C32, a grounded capacitor C31, a grounded capacitor C30, a grounded capacitor C29, one end of an inductor L10 and one end of a resistor R9, and the other end of the resistor R9 is connected to the other end of the inductor L10 and the power conversion circuit.
Still further, the power conversion circuit includes a power conversion chip U1, a power conversion chip U2, a power conversion chip U7, a transistor Q3, a transistor Q4, and a transistor Q5;
a VIN pin of the chip U1 is connected to a ground capacitor C5, a ground capacitor C4 and an input voltage DCIN, a ground terminal of the chip U1 is grounded, and a VOUT pin of the chip U1 is connected to an ENB pin of the driving circuit U4, an ENA pin of the driving circuit U4, a VDD pin of the driving circuit U4, a power conversion chip U2 and a ground capacitor C6;
a VIN pin of the chip U2 is connected to a ground capacitor C7 and a VOUT pin of the chip U1, respectively, and a VOUT pin of the chip U2 is connected to a ground capacitor C8, a ground capacitor C9, an AVDD3 pin of the chip U3, the other end of the resistor R10, the other end of the resistor R2, a power supply terminal of the logic gate circuit U6, and a power supply terminal of the logic gate circuit U5, respectively;
the VIN pin of the chip U7 is connected to one end of a resistor R6, a grounded capacitor C57 and an external power supply port DCIN, the EN pin of the chip U7 is connected to the other end of a resistor R6, one end of a resistor R7 and an enable pin EN, the VCC pin of the chip U7 is connected to one end of a capacitor C61, the other end of the capacitor C61 is connected to the other end of a resistor R7 and the GND pin of the chip U7 and grounded, the BST pin of the chip U7 is connected to one end of a resistor R3, the other end of a resistor R3 is connected to one end of a capacitor C56, the other end of the capacitor C56 is connected to one end of an inductor L13 and the SW pin of the chip U7, the other end of the inductor L13 is connected to one end of a capacitor C58, one end of a capacitor C59, one end of a capacitor C60, one end of a resistor R13 and the other end of an inductor L9, and the other end of the capacitor C58, The other end of the capacitor C59 and the other end of the capacitor C60 are connected to ground, the other end of the resistor R13 is connected to the FB pin of the chip U3, one end of the resistor R16, one end of the resistor R17, one end of the resistor R15 and one end of the resistor R14, the other end of the resistor R16 is connected to the drain of the transistor Q5, the other end of the resistor R15 is connected to the drain of the transistor Q4, the other end of the resistor R14 is connected to the drain of the transistor Q3, the source of the transistor Q5 is connected to the other end of the resistor R17, the source of the transistor Q4 and the source of the transistor Q3, and the gate of the transistor Q5, the gate of the transistor Q4 and the gate of the transistor Q3 are connected to the I/O interface of the wireless communication module host communication chip U3, and the gate of the transistor Q5 is connected to the PWM3 pin of the chip U3 and the ground The gate of the transistor Q4 is connected to the PWM2 pin of the chip U3 and the gate of the transistor Q3 is connected to the PWM4 pin of the chip U3.
Furthermore, the multi-path rectifying and voltage stabilizing circuit comprises a plurality of rectifying and voltage stabilizing circuits with the same structure, each rectifying and voltage stabilizing circuit comprises a rectifying bridge D, a radio frequency coil ANT, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor, and the output end of the rectifying bridge D of each rectifying and voltage stabilizing circuit is connected with the input end of the power supply management module; the first capacitor and the second capacitor are in parallel connection matching of radio frequency input; the third capacitor and the fourth capacitor are series-matched of radio frequency input.
Still further, the both ends of first electric capacity and the both ends of second electric capacity all are connected with radio frequency coil ANT, the one end of first electric capacity respectively with the one end of second electric capacity, the one end of third electric capacity and the one end of fourth electric capacity are connected, the other end of third electric capacity respectively with the other end of fourth electric capacity and rectifier bridge D's first input end are connected, the other end of first electric capacity is connected with the other end of second electric capacity and rectifier bridge D's second input respectively, rectifier bridge D's earthing terminal ground connection, power supply management module's input is connected to rectifier bridge D's output.
The invention has the beneficial effects that:
(1) the magnetic resonance transmitting module adopts the E-type differential power amplifier, so that the electromagnetic interference generated by the power amplifier can be obviously reduced, and the output ripple of the receiving circuit is reduced. The differential power amplifier structure is beneficial to reducing the impedance of the power amplifier, and the requirement on input voltage is reduced while the system efficiency is improved. And simultaneously, the miniaturization of the circuit is facilitated. The magnetic resonance receiving module adopts multi-path coil input and multi-path rectifying and voltage stabilizing circuits, and balances the load power of each path under the same circuit area, thereby reducing the heat consumption of the receiving circuit and improving the efficiency of rectifying and voltage stabilizing. Through the design, a scheme of low power supply voltage, low ripple output, high efficiency, low heat consumption and small-size magnetic resonance coupling wireless power supply is provided for the application scene of small micropower;
(2) the wireless communication module host and the wireless communication module slave carry out data interaction through wireless connection, the wireless communication module slave sends detected information such as receiving end rectified voltage, charging current and the like to the wireless communication module host to form closed-loop control, and the wireless communication module host adjusts the output voltage of the power supply conversion circuit according to different powers of a load end to realize matching of optimal efficiency;
(3) the magnetic resonance receiving antenna and the multi-path rectifying and voltage stabilizing circuit adopt a multi-layer stacked structure, and an electromagnetic shielding isolation device is clamped between the magnetic resonance receiving antenna and the multi-path rectifying and voltage stabilizing circuit, and the device can isolate radio frequency interference signals from a receiving circuit. Reducing interference of radio frequency signals to a receiving circuit;
(4) the multi-path receiving coil and the multi-path rectifying circuit are adopted, so that the receiving load power can be shared in a balanced manner, the working voltage of the rectifying circuit is reduced under the condition that the receiving power is not changed, the impedance of the receiving circuit can be reduced, the heat consumption of the circuit is reduced, and the rectifying and voltage stabilizing efficiency is improved;
(5) compared with a common rectifying and voltage stabilizing circuit, the multi-path receiving circuit adopted by the invention has the advantages that the occupied area of the circuit is obviously reduced, and the miniaturization of small micropower is facilitated.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an exploded view of the present invention.
Fig. 3 is a schematic diagram of data transmission and reception between the wireless communication module host and the wireless communication module slave according to the present invention.
Fig. 4 is a block diagram of a class E differential power amplifier system of a magnetic resonance transmitting module of the present invention.
Fig. 5 is a schematic diagram of a wireless communication master-slave machine in the invention.
FIG. 6 is a circuit diagram of a frequency source according to the present invention.
Fig. 7 is a circuit diagram of the rf power amplifier of the present invention.
FIG. 8 is a diagram of a power conversion circuit according to the present invention.
FIG. 9 is a diagram of a multi-path rectifying and voltage stabilizing circuit according to the present invention.
Fig. 10 is a diagram of transmission efficiency of the transmitting and receiving antenna according to the present invention.
Fig. 11 shows the measured values of power supply harmonics without a differential power amplifier.
Fig. 12 shows the measured harmonic value of the power supply using the differential power amplifier.
Wherein: the system comprises a 1-magnetic resonance transmitting module, a 2-magnetic resonance receiving module, a 3-wireless communication module host, a 4-frequency source, a 5-radio frequency power amplifying circuit, a 6-magnetic resonance transmitting antenna, a 7-power switching circuit, an 8-magnetic resonance receiving antenna, a 9-multi-path rectification voltage stabilizing circuit, a 10-wireless communication module slave, a 11-power supply management module, a 12-electromagnetic shielding isolation device, a 13-load and a battery.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
Examples
As shown in fig. 1-2, the present invention provides a magnetic resonance coupling-based small micro-power wireless charging device, which includes a magnetic resonance transmitting module 1 and a magnetic resonance receiving module 2 connected to the magnetic resonance transmitting module 1; the magnetic resonance transmitting module 1 comprises a wireless communication module host 3, a frequency source 4, a radio frequency power amplifying circuit 5, a magnetic resonance coupling transmitting antenna 6 and a power supply conversion circuit 7; the frequency source 4 is connected with a radio frequency power amplifying circuit 5, and the radio frequency power amplifying circuit 5 is connected with a magnetic resonance coupling transmitting antenna 6; the wireless communication module host 3 is respectively connected with the frequency source 4, the power conversion circuit 7 and the magnetic resonance receiving module 2; the power supply conversion circuit 7 provides power supply for the magnetic resonance emission module 1, and the power supply conversion circuit 7 provides electric voltage for the frequency source 4, the radio frequency power amplification circuit 5 and the wireless communication module host 3 respectively; the magnetic resonance receiving module 2 comprises a multi-channel magnetic resonance coupling receiving antenna 8, a multi-channel rectification voltage stabilizing circuit 9, a wireless communication module slave 10, a power supply management module 11, an electromagnetic shielding isolation module 12 and a load and battery 13; the multi-path rectification voltage stabilizing circuit 9 is connected with the power supply management module 11, the power supply management module 11 is connected with a load and a battery 13, and the electromagnetic shielding isolation module 12 is arranged between the multi-path magnetic resonance coupling receiving antenna 8 and the multi-path rectification voltage stabilizing circuit 9; the wireless communication module slave 10 is in bidirectional communication connection with the wireless communication module host 3; the multi-path magnetic resonance coupling receiving antenna 8 and the multi-path rectification voltage stabilizing circuit 9 are both of a multi-layer stacked structure.
In this embodiment, as shown in fig. 3 to 4, the power conversion circuit 7 in the magnetic resonance emission module is an input power of the magnetic resonance emission module 1, and the power conversion circuit 7 outputs a multi-step adjustable power supply voltage to the frequency source 4 and the radio frequency power amplification circuit 5. The output end of the frequency source 4 is connected with the radio frequency power amplifying circuit 5. The wireless communication module master 3 and the wireless communication module slave 10 communicate bidirectionally. The radio frequency power amplification circuit 5 is connected with the magnetic resonance transmitting antenna 6; a multi-path magnetic resonance receiving antenna 8 in the magnetic resonance receiving module is connected with a multi-path rectification voltage stabilizing circuit 9; the multi-path rectifying and voltage stabilizing circuit 9 is connected with the charging management module 11 and the wireless communication module slave 10. The charging management module 11 connects the load and the battery 13; the charging management module 11 outputs adjustable direct current to provide full charge and trickle charge for the battery, the charging current can be set, and the charging management module has the functions of current limiting and overvoltage protection. A multi-layer stacked structure is adopted between the multi-path magnetic resonance receiving antenna 8 and the multi-path rectifying and voltage stabilizing circuit 9, and an electromagnetic shielding and isolating device 12 is arranged between the multi-path magnetic resonance receiving antenna and the multi-path rectifying and voltage stabilizing circuit. The magnetic resonance transmitting module adopts an E-type differential power amplifier, so that the electromagnetic interference generated by the power amplifier can be obviously reduced, and the output ripple of the receiving circuit is reduced. The differential power amplifier structure is beneficial to reducing the impedance of the power amplifier, and the requirement on input voltage is reduced while the system efficiency is improved. And simultaneously, the miniaturization of the circuit is facilitated. The magnetic resonance receiving module adopts multi-path coil input and multi-path rectifying and voltage stabilizing circuits, and balances the load power of each path under the same circuit area, thereby reducing the heat consumption of the receiving circuit and improving the efficiency of rectifying and voltage stabilizing. Through the design, the invention provides a scheme for supplying magnetic resonance coupling wireless electric energy with low power supply voltage, low ripple output, high efficiency, low heat consumption and small size for the application scene of small micropower.
In this embodiment, a multi-layer stacked structure is adopted between the magnetic resonance receiving antenna 8 and the multi-path rectification voltage stabilizing circuit 9, and an electromagnetic shielding isolation device 12 is sandwiched therebetween, which can isolate the radio frequency interference signal from the receiving circuit. And the interference of the radio frequency signal to a receiving circuit is reduced.
As shown in fig. 5, the wireless communication module master 3 and the wireless communication module slave 10 have the same structure, and both include a communication chip U3, and the PWM3 pin, the PWM4 pin and the PWM2 pin of the chip U3 are respectively connected to the power conversion circuit 7; a PWM5 pin of a chip U3 is connected to a frequency source 4, a VDD3 pin of a chip U3 is connected to an AVDD3 pin of a chip U3, one end of a capacitor C47, one end of a capacitor C46, one end of a capacitor C45, one end of a capacitor C44, and a power conversion circuit 7, the other end of the capacitor C44, and the other end of the capacitor C44 are connected to ground, a DVSS pin of the chip U44 is connected to an ePAD pin of the chip U44 and grounded, a DVDDDEC pin of the chip U44 is connected to one end of the capacitor C44, a VDDDEC _ F pin of the chip U44 is connected to one end of the capacitor C44, the other end of the capacitor C44 is connected to ground, an ANT pin of the chip U44 is connected to one end of the capacitor C44 and the inductor L44, and the other end of the inductor L44 is connected to the inductor L44, the other end of the inductor L12 is connected with one end of a grounded capacitor C51 and one end of a capacitor C48 respectively, the other end of the capacitor C48 is connected with one end of an antenna A1, the other end of the antenna A1 is grounded, an XC2 pin of a chip U3 is connected with one end of the capacitor C54 and a 2 nd pin of a crystal Y1 respectively, an XC1 pin of the chip U3 is connected with A3 rd pin of the crystal Y1 and one end of a capacitor C55 respectively, the other end of the capacitor C55 is connected with a 2 nd pin of the crystal Y1 and the other end of the capacitor C54 respectively and is grounded, and the other end of the capacitor C54 is connected with a 4 th pin of the crystal Y1.
As shown in FIG. 6, the frequency source 4 comprises an active crystal X1, and the EN/NC pin of the active crystal X1 is connected with the PWM5 pin; the VCC pin of the active crystal X1 is connected to one end of a ground capacitor C12, one end of a ground resistor R11 and one end of a resistor R10, the other end of the resistor R10 is connected to the power conversion circuit 7, the ground terminal of the active crystal X1 is grounded, the OUT pin of the active crystal X1 is connected to one end of a resistor R12, the other end of the resistor R12 is connected to one end of a capacitor C13 and the ground capacitor C34, and the other end of the capacitor C13 is connected to the rf power amplifier circuit 5.
As shown in fig. 7, the radio frequency power amplifying circuit 5 is a class E differential power amplifier, and the radio frequency power amplifying circuit 5 includes a driving circuit U4, a logic gate circuit U5, a logic gate circuit U6, a power amplifier tube Q1, and a power amplifier tube Q2;
the positive phase end of the logic gate circuit U5 is connected with the other end of the capacitor C13 and the reverse phase end of the logic gate circuit U5 respectively, the grounding end of the logic gate circuit U5 is grounded, the power supply end of the logic gate circuit U5 is connected with the grounding capacitor C33 and the power supply conversion circuit 7 respectively, and the output end of the logic gate circuit U5 is connected with the driving circuit U4;
the positive phase end of a logic gate circuit U6 is connected with the other end of a capacitor C13, the reverse phase end of a logic gate circuit U6 is respectively connected with one end of a grounding capacitor C16 and one end of a resistor R2, the other end of the resistor R2 is connected with a power conversion circuit 7, the grounding end of a logic gate circuit U6 is grounded, the power supply end of the logic gate circuit U6 is respectively connected with the grounding capacitor C17 and the power conversion circuit 7 in a power supply mode, and the output end of a logic gate circuit U6 is connected with a driving circuit U4;
the ENA pin of the driving circuit U4 is connected with the power supply conversion circuit 7, the INA pin of the driving circuit U4 is connected with the output end of the logic gate circuit U5, the grounding end of the driving circuit U4 is grounded, the INB pin of the driving circuit U4 is connected with the output end of the logic gate circuit U6, the ENB pin of the driving circuit U4 is connected with the power supply conversion circuit 7, the OUTA pin of the driving circuit U4 is connected with one end of a resistor R4, the other end of the resistor R4 is connected with one end of an inductor L1, the other end of the inductor L1 is connected with the gate of the power amplifier Q1, the VDD pins of the driving circuit U4 are respectively connected with the power supply conversion circuit 7, one end of a capacitor C15 is connected with one end of a capacitor C14, the other end of a capacitor C14 is connected with the other end of the capacitor C15 and grounded, an OUTB pin of a driving circuit U4 is connected with one end of a resistor R5, the other end of a resistor R5 is connected with one end of an inductor L2, and the other end of the inductor L2 is connected with a gate of a power amplifier tube Q2;
the source of the power amplifier tube Q1 is grounded, the drain of the power amplifier tube Q1 is connected with one end of an inductor L3, one end of a grounded capacitor C20 and one end of an inductor L5 respectively, the other end of the inductor L5 is connected with one end of a capacitor C22, the other end of the capacitor C22 is connected with one end of the inductor L6, the other end of the inductor L6 is connected with the grounded capacitor C24, the grounded capacitor C10 and the 1 st pin of the radio frequency output J3 respectively, the other end of the inductor L3 is connected with one end of a grounded capacitor C3, a grounded capacitor C2, a grounded capacitor C1, a grounded capacitor C28, one end of an inductor L9 and one end of a resistor R8 respectively, and the other end of a resistor R8 is connected with the other end of the inductor L9;
the source of the power amplifier tube Q2 is grounded, the drain of the power amplifier tube Q2 is connected to one end of an inductor L7, one end of a grounded capacitor C21 and one end of an inductor L4, the other end of the inductor L7 is connected to one end of a capacitor C26, the other end of the capacitor C26 is connected to one end of the inductor L8, the other end of the inductor L8 is connected to the grounded capacitor C27, the grounded capacitor C11 and the 3 rd pin of the rf output J3, the other end of the inductor L4 is connected to one end of a grounded capacitor C32, a grounded capacitor C31, a grounded capacitor C30, a grounded capacitor C29, one end of an inductor L10 and one end of a resistor R9, and the other end of a resistor R9 is connected to the other end of the inductor L10 and the power conversion.
As shown in fig. 8, the power conversion circuit 7 includes a power conversion chip U1, a power conversion chip U2, a power conversion chip U7, a transistor Q3, a transistor Q4, and a transistor Q5;
a VIN pin of the chip U1 is respectively connected with a grounding capacitor C5, a grounding capacitor C4 and an input voltage DCIN, a grounding end of the chip U1 is grounded, and a VOUT pin of the chip U1 is respectively connected with an ENB pin of the driving circuit U4, an ENA pin of the driving circuit U4, a VDD pin of the driving circuit U4, a power conversion chip U2 and a grounding capacitor C6;
a VIN pin of the chip U2 is respectively connected with a grounding capacitor C7 and a VOUT pin of the chip U1, and the VOUT pin of the chip U2 is respectively connected with a grounding capacitor C8, a grounding capacitor C9, an AVDD3 pin of the chip U3, the other end of the resistor R10, the other end of the resistor R2, a power supply end of the logic gate circuit U6 and a power supply end of the logic gate circuit U5;
a VIN pin of the chip U7 is connected to one end of a resistor R6, a grounded capacitor C57 and an external power supply port DCIN, an EN pin of the chip U7 is connected to the other end of a resistor R6, one end of a resistor R7 and an enable pin EN, a VCC pin of the chip U7 is connected to one end of a capacitor C61, the other end of the capacitor C61 is connected to the other end of a resistor R7 and a GND pin of a chip U7 and grounded, a BST pin of the chip U7 is connected to one end of a resistor R3, the other end of a resistor R3 is connected to one end of a capacitor C56, the other end of a capacitor C56 is connected to one end of an inductor L13 and a SW pin of a chip U7, the other end of an inductor L13 is connected to one end of a capacitor C13, one end of a capacitor C13 and the other end of a capacitor C13 are connected to ground, the other end of the resistor R13 is connected to the FB pin of the chip U3, one end of the resistor R16, one end of the resistor R17, one end of the resistor R15, and one end of the resistor R14, the other end of the resistor R16 is connected to the drain of the transistor Q5, the other end of the resistor R15 is connected to the drain of the transistor Q4, the other end of the resistor R14 is connected to the drain of the transistor Q3, the source of the transistor Q5 is connected to the other end of the resistor R5, the source of the transistor Q5, and the source of the transistor Q5 are connected to ground, the gate of the transistor Q5, the PWM5 pin of the chip U5, the gate of the transistor Q5, and the PWM5 pin of the chip Q5 are connected to the I/O interface of the wireless communication module host 3 communication chip U5.
In this embodiment, the wireless communication module host 3 switches the output voltage VDS of the power conversion circuit 7 by controlling different high and low levels of the gates of the transistor Q3, the transistor Q4, and the transistor Q5, so as to provide different power supply voltages to the radio frequency power amplifying circuit 5.
As shown in fig. 9, the multi-path rectifying and voltage-stabilizing circuit 9 includes a plurality of rectifying and voltage-stabilizing circuits with the same structure, each of which includes a rectifying bridge D, a radio frequency coil ANT, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor, and an output terminal of the rectifying bridge D of each of the rectifying and voltage-stabilizing circuits is connected to an input terminal of the power supply management module 11; the first capacitor and the second capacitor are in parallel connection matching of radio frequency input; the third capacitor and the fourth capacitor are series-matched for the radio frequency input. The two ends of the first capacitor and the two ends of the second capacitor are connected with the radio frequency coil ANT, one end of the first capacitor is connected with one end of the second capacitor, one end of the third capacitor and one end of the fourth capacitor respectively, the other end of the third capacitor is connected with the other end of the fourth capacitor and the first input end of the rectifier bridge D respectively, the other end of the first capacitor is connected with the other end of the second capacitor and the second input end of the rectifier bridge D respectively, the grounding end of the rectifier bridge D is grounded, and the output end of the rectifier bridge D is connected with the input end of the power supply management module 11.
As shown in fig. 9, the multi-path rectifying and voltage stabilizing circuit includes rectifying bridges D1, D2, DN, and receiving coils ANT1, ANT2, ANT n. Wherein DN is the rectification voltage stabilization of the Nth path, and ANTN is the receiving coil of the Nth path. The radio frequency coils C19 and C23 are parallel matching of the first path of radio frequency input, and two ends of C19 and C23 are connected with a radio frequency coil ANT 1; c18 and C26 are series matching of the first path of radio frequency input. One end of C19 and one end of C23 are connected with one end of C18 and one end of C26; the other end of the C19 and the other end of the C23 are connected with one end of a rectifier bridge D1; the other end of the C18 and the other end of the C26 are connected with the other end of the rectifier bridge D1, and direct current signals are output to VIN and a system grounding point after being rectified by the rectifier bridge D1; c36 and C37 are parallel matching of the second path of radio frequency input. Both ends of C36 and C37 are connected with a radio frequency coil ANT 2; c35 and C38 are series matching of the second path of radio frequency input. One end of C36 and one end of C37 are connected with one end of C35 and one end of C38; the other end of the C36 and the other end of the C37 are connected with one end of a rectifier bridge D2; the other end of the C35 and the other end of the C38 are connected with the other end of the rectifier bridge D2, and direct current signals are output to VIN and a system grounding point after being rectified by the rectifier bridge D2; c40 and C41 are parallel matching of the Nth radio frequency input. Both ends of C40 and C41 are connected with a radio frequency coil ANTN; c39 and C42 are series matching of the Nth radio frequency input. One end of C40 and one end of C41 are connected with one end of C39 and one end of C42; the other end of the C40 and the other end of the C41 are connected with one end of a rectifier bridge DN; the other end of the C39 and the other end of the C42 are connected with the other end of the rectifier bridge DN, and direct current signals are output to VIN and a system grounding point after being rectified by the rectifier bridge DN. The direct current signal output by the multi-path rectifying and voltage stabilizing circuit 9 is connected to the charging management module 11, and the output end of the charging management module 11 is connected to the load and the battery 13 to provide power for the load and the battery.
In this embodiment, the radio frequency power amplifying circuit 5 adopts a class E differential power amplifier design, which can effectively suppress the harmonic generated by the circuit, minimize the ripple effect of the power amplifying circuit on the system, and reduce the interference on other circuits of the system, such as a low voltage dc power supply, a sensor, and an analog amplifying circuit lamp; the radio frequency power amplifying circuit 5 can output higher power than other power amplifiers under the same power supply power, so that the area and size of a PCB (printed circuit board) of the power amplifier circuit can be obviously reduced, and the radio frequency power amplifying circuit is very suitable for application scenes that the requirement on power supply ripples is high, the power supply of a power supply is limited and miniaturization is needed.
In this embodiment, a signal with a specific frequency is generated by the frequency source 4, the radio frequency power amplification circuit 5 amplifies the radio signal, and the radio signal is matched and filtered to generate magnetic resonance coupling with the multi-channel magnetic resonance receiving antenna 8 through the magnetic resonance transmitting antenna 6. The device is suitable for the working range of 3MHz-100 MHz.
In this embodiment, the multi-path rectifying and voltage stabilizing circuit 9 and the charging management module 11, wherein the multi-path rectifying and voltage stabilizing circuit couples the radio frequency energy emitted from the magnetic resonance emission module 1, and the multi-path rectifying and voltage stabilizing circuit 9 rectifies and stabilizes the radio frequency energy to obtain a dc voltage. The charging management module 11 is responsible for outputting the rectified dc voltage to the load and the battery 13.
In this embodiment, the wireless communication module host 3 and the wireless communication module slave 10 perform data interaction through wireless connection, the wireless communication module slave 10 sends detected information such as receiving-end rectified voltage, charging current and the like to the wireless communication module host 3 to form closed-loop control, and the wireless communication module host 3 adjusts the output voltage of the power conversion circuit 7 according to different powers of the load end, so as to realize matching of optimal efficiency.
In this embodiment, the frequency source 4 in the magnetic resonance transmitting module 1 provides an input signal with adjustable frequency to the radio frequency power amplifying circuit 5, the radio frequency power amplifying circuit 5 shapes and conditions the input signal provided by the frequency source 4 and inputs the shaped and conditioned input signal to the driving circuit of the radio frequency power amplifying circuit 5, then drives the two power amplifier chips Q1 and Q2 of the radio frequency power amplifying circuit 5 to realize filtering and amplifying of a differential signal, and finally outputs the amplified radio frequency signal to the magnetic resonance coupling transmitting antenna 6. The magnetic resonance coupling receiving antenna 8 in the magnetic resonance receiving module 2 receives the output signal of the magnetic resonance coupling transmitting antenna 6 in the magnetic resonance transmitting module 1 through the same-frequency magnetic resonance coupling, and the signal is rectified and stabilized by the multi-path rectifying and stabilizing circuit 9 and then output to the power supply management module 11, and the power supply management module 11 outputs voltage to the load and the battery 13, so that the wireless power supply to the load equipment is realized; the wireless communication module host 3 in the magnetic resonance transmitting module 1 and the wireless communication module slave 10 in the magnetic resonance receiving module 2 realize data interaction through wireless communication; the wireless communication module host 3 judges the status of the load end according to the received related current and voltage collected in the magnetic resonance receiving module 2, and realizes the output power matching of the magnetic resonance receiving module 2 by adjusting the output voltage VDS of the power conversion circuit 7, thereby ensuring the efficient transmission of the radio energy of the magnetic resonance transmitting module 1 and the magnetic resonance receiving module 2. The magnetic resonance transmitting module adopts the E-type differential power amplifier, so that the electromagnetic interference generated by the power amplifier can be obviously reduced, and the output ripple of the receiving circuit is reduced. The differential power amplifier structure is beneficial to reducing the impedance of the power amplifier, and the requirement on input voltage is reduced while the system efficiency is improved. And simultaneously, the miniaturization of the circuit is facilitated. The magnetic resonance receiving module adopts multi-path coil input and multi-path rectifying and voltage stabilizing circuits, and balances the load power of each path under the same circuit area, thereby reducing the heat consumption of the receiving circuit and improving the efficiency of rectifying and voltage stabilizing.
In this embodiment, the power conversion circuit 7 in the magnetic resonance emission module is an input power supply of the magnetic resonance emission module 1, the power conversion circuit 7 outputs VCC _5V, VCC _12 and VDS to the radio frequency power amplification circuit 5, and the power conversion circuit 7 further provides a VCC _5V power supply to the wireless communication module host 3 and the frequency source 4;
in this embodiment, as shown in fig. 10, a transmission efficiency simulation efficiency diagram of the magnetic resonance transmitting antenna 6 and the magnetic resonance receiving antenna 6 shows that the optimal transmission efficiency reaches 92.87%.
In this embodiment, as shown in fig. 11, the power harmonic measurement value of the differential power amplifier is not used. As can be seen from the figure, in order to adopt the harmonic values of the differential power amplifier circuit to gradually decrease with the increase of the frequency, it is obvious that such harmonic waves bring serious interference to the system, which results in the deterioration of the transmission efficiency and uncontrollable heating of the system.
The efficiency of wireless charging is low;
in this embodiment, as shown in fig. 12, a harmonic measurement value is obtained by using a differential power amplifier. In comparison with fig. 11, odd and even harmonics except the dominant frequency of 6.78Mhz are both significantly suppressed by the differential power amplifier.
Claims (7)
1. The magnetic resonance coupling-based small micropower wireless charging device is characterized by comprising a magnetic resonance transmitting module (1) and a magnetic resonance receiving module (2) connected with the magnetic resonance transmitting module (1);
the magnetic resonance transmitting module (1) comprises a wireless communication module host (3), a frequency source (4), a radio frequency power amplifying circuit (5), a magnetic resonance coupling transmitting antenna (6) and a power supply conversion circuit (7); the frequency source (4) is connected with the radio frequency power amplification circuit (5), and the radio frequency power amplification circuit (5) is connected with the magnetic resonance coupling transmitting antenna (6); the wireless communication module host (3) is respectively connected with the frequency source (4), the power conversion circuit (7) and the magnetic resonance receiving module (2); the power supply conversion circuit (7) provides power supply for the magnetic resonance emission module (1), and the power supply conversion circuit (7) provides electric voltage for the frequency source (4), the radio frequency power amplification circuit (5) and the wireless communication module host (3) respectively;
the magnetic resonance receiving module (2) comprises a plurality of paths of magnetic resonance coupling receiving antennas (8), a plurality of paths of rectifying voltage stabilizing circuits (9), a wireless communication module slave machine (10), a power supply management module (11), an electromagnetic shielding isolation module (12) and a load and battery (13); the multi-path rectifying and voltage stabilizing circuit (9) is connected with the power supply management module (11), the power supply management module (11) is connected with the load and the battery (13), and the electromagnetic shielding isolation module (12) is arranged between the multi-path magnetic resonance coupling receiving antenna (8) and the multi-path rectifying and voltage stabilizing circuit (9); the wireless communication module slave machine (10) is in bidirectional communication connection with the wireless communication module host machine (3); the multi-path magnetic resonance coupling receiving antenna (8) and the multi-path rectification voltage stabilizing circuit (9) are both of a multilayer stacked structure.
2. The magnetic resonance coupling-based small micro-power wireless charging device according to claim 1, wherein the wireless communication module host (3) and the wireless communication module slave (10) have the same structure, and each of the wireless communication module host and the wireless communication module slave comprises a communication chip U3, and a PWM3 pin, a PWM4 pin and a PWM2 pin of the chip U3 are respectively connected with the power conversion circuit (7); the PWM5 pin of the chip U3 is connected to the frequency source (4), the VDD3 pin of the chip U3 is connected to the AVDD3 pin of the chip U3, one end of the capacitor C47, one end of the capacitor C46, one end of the capacitor C45, one end of the capacitor C44, and the power conversion circuit (7), the other end of the capacitor C47, the other end of the capacitor C46, the other end of the capacitor C45, and the other end of the capacitor C44 are connected to ground, the DVSS pin of the chip U3 is connected to the ePAD pin of the chip U3 and to ground, the dddvdec pin of the chip U3 is connected to one end of the capacitor C52, the VDDDEC _ F pin of the chip U3 is connected to one end of the capacitor C3, the other end of the capacitor C3 is connected to ground, the ANT pin of the chip U3 is connected to one end of the capacitor C3, the other end of the capacitor C3 is connected to the inductor L3 and one end of the capacitor C3, the other end of the inductor L11 is connected with one end of a grounded capacitor C50 and one end of an inductor L12, the other end of the inductor L12 is connected with one end of a grounded capacitor C51 and one end of a capacitor C48, the other end of the capacitor C48 is connected with one end of an antenna A1, the other end of the antenna A1 is grounded, an XC2 pin of the chip U3 is connected with one end of a capacitor C54 and a 2 nd pin of a crystal Y1, an XC1 pin of the chip U3 is connected with A3 rd pin of a crystal Y1 and one end of a capacitor C55, the other end of the capacitor C55 is connected with a 2 nd pin of the crystal Y1 and the other end of the capacitor C54 and grounded, and the other end of the capacitor C54 is connected with a 4 th pin of the crystal Y1.
3. The magnetic resonance coupling-based small micropower wireless charging device of claim 2, wherein the frequency source (4) comprises an active crystal X1, the EN/NC pin of the active crystal X1 is connected with a PWM5 pin; the VCC pin of active crystal X1 is connected with ground capacitance C12, ground resistance R11's one end and resistance R10's one end respectively, resistance R10's the other end is connected with power conversion circuit (7), active crystal X1's ground terminal ground connection, active crystal X1's OUT pin is connected with resistance R12's one end, resistance R12's the other end is connected with capacitance C13's one end and ground capacitance C34 respectively, capacitance C13's the other end respectively with radio frequency power amplifier circuit (5) connect.
4. The magnetic resonance coupling-based small micro-power wireless charging device according to claim 3, wherein the radio frequency power amplifying circuit (5) is a class E differential power amplifier, and the radio frequency power amplifying circuit (5) comprises a driving circuit U4, a logic gate circuit U5, a logic gate circuit U6, a power amplifier tube Q1 and a power amplifier tube Q2;
the positive phase end of the logic gate circuit U5 is respectively connected with the other end of the capacitor C13 and the reverse phase end of the logic gate circuit U5, the grounding end of the logic gate circuit U5 is grounded, the power supply end of the logic gate circuit U5 is respectively connected with a grounded capacitor C33 and a power supply conversion circuit (7), and the output end of the logic gate circuit U5 is connected with the driving circuit U4;
the positive phase end of the logic gate circuit U6 is connected with the other end of the capacitor C13, the reverse phase end of the logic gate circuit U6 is respectively connected with one end of a grounded capacitor C16 and one end of a resistor R2, the other end of the resistor R2 is connected with a power conversion circuit (7), the grounding end of the logic gate circuit U6 is grounded, the power supply end of the logic gate circuit U6 is respectively connected with the grounded capacitor C17 and the power conversion circuit (7) in a power supply mode, and the output end of the logic gate U6 is connected with the driving circuit U4;
the ENA pin of the driving circuit U4 is connected with a power conversion circuit (7), the INA pin of the driving circuit U4 is connected with the output end of the logic gate circuit U5, the grounding end of the driving circuit U4 is grounded, the INB pin of the driving circuit U4 is connected with the output end of the logic gate circuit U6, the ENB pin of the driving circuit U4 is connected with the power conversion circuit (7), the OUTA pin of the driving circuit U4 is connected with one end of a resistor R4, the other end of the resistor R4 is connected with one end of an inductor L1, the other end of the inductor L1 is connected with the gate of the power amplifier Q1, the VDD pin of the driving circuit U4 is respectively connected with the power conversion circuit (7), one end of a capacitor C15 and one end of a capacitor C14, the other end of the capacitor C14 is connected with the other end of the capacitor C15 and grounded, the OUTB pin of the driving circuit U4 is connected with one end of a resistor R5, the other end of the resistor R5 is connected with one end of an inductor L2, and the other end of the inductor L2 is connected with the gate of a power amplifier tube Q2;
the source of the power amplifying tube Q1 is grounded, the drain of the power amplifying tube Q1 is connected with one end of an inductor L3, one end of a grounded capacitor C20 and one end of an inductor L5 respectively, the other end of the inductor L5 is connected with one end of a capacitor C22, the other end of the capacitor C22 is connected with one end of the inductor L6, the other end of the inductor L6 is connected with the grounded capacitor C24, the grounded capacitor C10 and the 1 st pin of the radio frequency output J3 respectively, the other end of the inductor L3 is connected with one end of a grounded capacitor C3, a grounded capacitor C2, a grounded capacitor C1, a grounded capacitor C28, one end of an inductor L9 and one end of a resistor R8 respectively, and the other end of the resistor R8 is connected with the other end of the inductor L9 and the power conversion circuit (7) respectively;
the source of the power amplifying tube Q2 is grounded, the drain of the power amplifying tube Q2 is connected with one end of an inductor L7, one end of a grounded capacitor C21 and one end of an inductor L4, the other end of the inductor L7 is connected with one end of a capacitor C26, the other end of the capacitor C26 is connected with one end of the inductor L8, the other end of the inductor L8 is connected with the grounded capacitor C27, the grounded capacitor C11 and the 3 rd pin of the radio frequency output J3, the other end of the inductor L4 is connected with one end of a grounded capacitor C32, a grounded capacitor C31, a grounded capacitor C30, a grounded capacitor C29, one end of an inductor L10 and one end of a resistor R9, and the other end of the resistor R9 is connected with the other end of the inductor L10 and the power conversion circuit (7).
5. The magnetic resonance coupling-based small micro-power wireless charging device according to claim 4, wherein the power conversion circuit (7) comprises a power conversion chip U1, a power conversion chip U2, a power conversion chip U7, a transistor Q3, a transistor Q4 and a transistor Q5;
a VIN pin of the chip U1 is connected to a ground capacitor C5, a ground capacitor C4 and an input voltage DCIN, a ground terminal of the chip U1 is grounded, and a VOUT pin of the chip U1 is connected to an ENB pin of the driving circuit U4, an ENA pin of the driving circuit U4, a VDD pin of the driving circuit U4, a power conversion chip U2 and a ground capacitor C6;
a VIN pin of the chip U2 is connected to a ground capacitor C7 and a VOUT pin of the chip U1, respectively, and a VOUT pin of the chip U2 is connected to a ground capacitor C8, a ground capacitor C9, an AVDD3 pin of the chip U3, the other end of the resistor R10, the other end of the resistor R2, a power supply terminal of the logic gate circuit U6, and a power supply terminal of the logic gate circuit U5, respectively;
the VIN pin of the chip U7 is connected to one end of a resistor R6, a grounded capacitor C57 and an external power supply port DCIN, the EN pin of the chip U7 is connected to the other end of a resistor R6, one end of a resistor R7 and an enable pin EN, the VCC pin of the chip U7 is connected to one end of a capacitor C61, the other end of the capacitor C61 is connected to the other end of a resistor R7 and the GND pin of the chip U7 and grounded, the BST pin of the chip U7 is connected to one end of a resistor R3, the other end of a resistor R3 is connected to one end of a capacitor C56, the other end of the capacitor C56 is connected to one end of an inductor L13 and the SW pin of the chip U7, the other end of the inductor L13 is connected to one end of a capacitor C58, one end of a capacitor C59, one end of a capacitor C60, one end of a resistor R13 and the other end of an inductor L9, and the other end of the capacitor C58, The other end of the capacitor C59 and the other end of the capacitor C60 are connected to ground, the other end of the resistor R13 is connected to the FB pin of the chip U3, one end of the resistor R16, one end of the resistor R17, one end of the resistor R15 and one end of the resistor R14, the other end of the resistor R16 is connected to the drain of the transistor Q5, the other end of the resistor R15 is connected to the drain of the transistor Q4, the other end of the resistor R14 is connected to the drain of the transistor Q3, the source of the transistor Q5 is connected to the other end of the resistor R17, the source of the transistor Q4 and the source of the transistor Q3, and the gate of the transistor Q5, the gate of the transistor Q4 and the gate of the transistor Q3 are connected to the I/O interface of the communication chip U3 of the wireless communication module host (3), and the gate of the transistor Q5 is connected to the PWM3 pin 3 of the chip U3, The gate of the transistor Q4 is connected to the PWM2 pin of the chip U3 and the gate of the transistor Q3 is connected to the PWM4 pin of the chip U3.
6. The magnetic resonance coupling-based small micropower wireless charging device according to claim 1, wherein the multi-path rectifying and voltage stabilizing circuit (9) comprises a plurality of rectifying and voltage stabilizing circuits with the same structure, each rectifying and voltage stabilizing circuit comprises a rectifying bridge D, a radio frequency coil ANT, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor, and the output end of the rectifying bridge D of each rectifying and voltage stabilizing circuit is connected with the input end of the power supply management module (11); the first capacitor and the second capacitor are in parallel connection matching of radio frequency input; the third capacitor and the fourth capacitor are series-matched of radio frequency input.
7. The magnetic resonance coupling-based small micropower wireless charging device according to claim 6, wherein two ends of the first capacitor and two ends of the second capacitor are both connected to the radio frequency coil ANT, one end of the first capacitor is respectively connected to one end of the second capacitor, one end of the third capacitor and one end of the fourth capacitor, the other end of the third capacitor is respectively connected to the other end of the fourth capacitor and the first input end of the rectifier bridge D, the other end of the first capacitor is respectively connected to the other end of the second capacitor and the second input end of the rectifier bridge D, the ground end of the rectifier bridge D is grounded, and the output end of the rectifier bridge D is connected to the input end of the power supply management module (11).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113922518A (en) * | 2021-10-28 | 2022-01-11 | 成都斯普奥汀科技有限公司 | Magnetic resonance wireless charging system with switch power supply removed |
| CN116780791A (en) * | 2023-08-25 | 2023-09-19 | 成都斯普奥汀科技有限公司 | Wireless treasured system that charges based on magnetic resonance technique |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017181454A1 (en) * | 2016-04-20 | 2017-10-26 | 深圳市速腾聚创科技有限公司 | Wireless communication system providing power transfer |
| CN110313043A (en) * | 2017-02-10 | 2019-10-08 | Lg伊诺特有限公司 | Magnetic piece and wireless power reception device including the magnetic piece |
| CN110855024A (en) * | 2019-10-18 | 2020-02-28 | 成都斯普奥汀科技有限公司 | Device for controlling wireless charging output power based on PWM (pulse-width modulation) integral circuit |
| CN213693242U (en) * | 2020-11-27 | 2021-07-13 | 成都斯普奥汀科技有限公司 | Little micropower wireless charging device based on magnetic resonance coupling |
-
2020
- 2020-11-27 CN CN202011358129.1A patent/CN112383155A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017181454A1 (en) * | 2016-04-20 | 2017-10-26 | 深圳市速腾聚创科技有限公司 | Wireless communication system providing power transfer |
| CN110313043A (en) * | 2017-02-10 | 2019-10-08 | Lg伊诺特有限公司 | Magnetic piece and wireless power reception device including the magnetic piece |
| CN110855024A (en) * | 2019-10-18 | 2020-02-28 | 成都斯普奥汀科技有限公司 | Device for controlling wireless charging output power based on PWM (pulse-width modulation) integral circuit |
| CN213693242U (en) * | 2020-11-27 | 2021-07-13 | 成都斯普奥汀科技有限公司 | Little micropower wireless charging device based on magnetic resonance coupling |
Non-Patent Citations (1)
| Title |
|---|
| 罗瑜清;杨曼;陈廷艳;黄远民;: "一种磁耦合谐振式无线充电系统的研究与设计", 计算机产品与流通, no. 10, 15 October 2017 (2017-10-15), pages 191 - 192 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113922518A (en) * | 2021-10-28 | 2022-01-11 | 成都斯普奥汀科技有限公司 | Magnetic resonance wireless charging system with switch power supply removed |
| CN113922518B (en) * | 2021-10-28 | 2024-03-26 | 成都斯普奥汀科技有限公司 | Get rid of switching power supply's wireless charging system of magnetic resonance |
| CN116780791A (en) * | 2023-08-25 | 2023-09-19 | 成都斯普奥汀科技有限公司 | Wireless treasured system that charges based on magnetic resonance technique |
| CN116780791B (en) * | 2023-08-25 | 2023-11-07 | 成都斯普奥汀科技有限公司 | Wireless treasured system that charges based on magnetic resonance technique |
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