CN117639288A - Underwater single-capacitor coupling wireless charging system and parameter design method - Google Patents
Underwater single-capacitor coupling wireless charging system and parameter design method Download PDFInfo
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Abstract
The invention discloses an underwater single-capacitor coupling wireless charging system and a parameter design method, and relates to the technical field of underwater wireless charging; the system comprises: a high-frequency inverter circuit, a resonant circuit, and a high-frequency rectifier circuit; the high-frequency inverter circuit is connected with a transmitting end direct-current power supply; the resonant circuit is connected with the high-frequency inverter circuit; the high-frequency rectifying circuit is connected with receiving end load equipment; the high-frequency inverter circuit is used for converting direct current of the transmitting end direct current power supply into alternating current; the resonance circuit carries out voltage rising treatment on the alternating current to obtain treated alternating current, obtains energy of the treated alternating current in a wireless mode based on a coupling capacitor, and matches impedance to a resonance state through energy based on a circuit theory to obtain resonance alternating current; the high-frequency rectification circuit is used for converting the resonant alternating current into direct current; the direct current is used for supplying power to the receiving end load equipment; the underwater single-capacitor coupling wireless charging system can improve the power and efficiency of underwater single-capacitor coupling wireless charging.
Description
Technical Field
The invention relates to the technical field of underwater wireless charging, in particular to an underwater single-capacitor coupling wireless charging system and a parameter design method.
Background
The underwater environment has special challenges for power supply, and the conventional wired power supply mode cannot meet the requirements of underwater equipment, such as underwater illumination, unmanned underwater vehicles, underwater monitoring equipment and the like. In recent years, researchers have begun to explore underwater wireless charging technologies that enable underwater equipment to operate for long periods of time without frequent maintenance. The underwater wireless charging technology is used as a solution with great potential, and can effectively solve the problem of supplying power required by long-time work of underwater equipment. The underwater wireless charging system relies on electromagnetic waves as a transmission medium, electromagnetic signals are generated at a transmitting end, and receiving end equipment receives the signals and converts the signals into electric energy for charging. The system is based on the electric energy transmission principle, and wireless energy transmission is realized by utilizing technologies such as resonance, electromagnetic coupling and the like.
The underwater wireless charging technology is mainly divided into two types of magnetic field coupling type and electric field coupling type. The magnetic field coupling type wireless charging system realizes energy transmission by exciting a high-frequency magnetic field under water by virtue of a transmission coil, and the method has the advantage of higher transmission efficiency in a short-distance range. Magnetic field coupled transmission can optimize transmission efficiency by adjusting the distance between the transmission devices and is therefore a more suitable option for charging shorter distance underwater equipment. However, the transmission distance of the magnetic field coupling type wireless charging system is relatively short, and the magnetic field coupling type wireless charging system is not suitable for wireless power supply under the underwater long-distance working condition.
The electric field coupling type wireless charging system utilizes a high-frequency electric field between the transmitting end and the receiving end polar plate to wirelessly transmit energy, and the method can realize energy transmission at a longer distance, so that the distance between the charging base station and the receiving equipment can be larger. When the transmission distance is long, the conventional underwater quadrupolar plate type electric field coupling wireless charging system is difficult to match parameters due to the severe edge effect, and a more complex matching circuit and an adjustment method are required to improve the transmission efficiency.
Disclosure of Invention
The invention aims to provide an underwater single-capacitor coupling wireless charging system and a parameter design method, which are used for improving the power and efficiency of underwater single-capacitor coupling wireless charging.
In order to achieve the above object, the present invention provides the following solutions:
an underwater single capacitive coupling wireless charging system, the system comprising: a high-frequency inverter circuit, a resonant circuit, and a high-frequency rectifier circuit;
the high-frequency inverter circuit is connected with a transmitting end direct-current power supply; the resonant circuit is connected with the high-frequency inverter circuit; the high-frequency rectifying circuit is connected with receiving end load equipment;
the high-frequency inverter circuit is used for converting direct current of the transmitting-end direct current power supply into alternating current;
the resonant circuit is used for:
carrying out voltage rising treatment on the alternating current to obtain treated alternating current;
acquiring the energy of the processing alternating current in a wireless mode based on a coupling capacitor;
matching impedance to a resonance state through the energy based on a circuit theory to obtain resonance alternating current;
the high-frequency rectifying circuit is used for converting the resonant alternating current into direct current; the direct current is used to power the receiving end load device.
Optionally, the resonant circuit includes: the device comprises a transmitting end resonant circuit, a single capacitive coupling polar plate and a receiving end resonant circuit;
the transmitting end resonant circuit is connected with the high-frequency inverter circuit; the single capacitive coupling polar plate is respectively connected with the transmitting end resonant circuit and the receiving end resonant circuit; the receiving end resonant circuit is connected with the high-frequency rectifying circuit;
the transmitting end resonant circuit is used for carrying out voltage rising treatment on the alternating current to obtain treated alternating current;
the single capacitive coupling polar plate is used for forming a coupling capacitor and acquiring the energy of the processing alternating current in a wireless mode;
the receiving end resonant circuit is used for matching impedance to a resonant state through the energy based on a circuit theory, and resonant alternating current is obtained.
Optionally, the single capacitive coupling plate includes: a transmitting end polar plate and a receiving end polar plate;
the transmitting end polar plate is connected with the transmitting end resonant circuit; the receiving end polar plate is connected with the receiving end resonant circuit;
and the transmitting end polar plate and the receiving end polar plate are coupled to obtain a coupling capacitor.
Optionally, the transmitting end polar plate and the receiving end polar plate are square aluminum plates, and the distance between the transmitting end polar plate and the receiving end polar plate is 1 meter.
Optionally, the transmitting-end resonant circuit includes: the first parallel circuit and the second transmitting end compensate the inductance; the first parallel circuit includes: the transmitting end compensation capacitor and the first transmitting end compensation inductor are connected in parallel;
one end of the second transmitting end compensating inductor is connected with the first parallel circuit; the other end of the second transmitting end compensating inductor is connected with the transmitting end polar plate;
one end of the first transmitting end compensating inductor is connected with the high-frequency inverter circuit; one end of the transmitting end compensation capacitor is connected with the high-frequency inverter circuit; the other end of the first transmitting end compensating inductor is connected with the other end of the transmitting end compensating capacitor, and the connecting point is connected with one end of the second transmitting end compensating inductor.
Optionally, the receiving-end resonant circuit includes: the second parallel circuit and the first receiving end compensate the inductance; the second parallel circuit includes: the second receiving end compensating inductor and the receiving end compensating capacitor are connected in parallel;
one end of the first receiving end compensating inductor is connected with the receiving end polar plate; the other end of the first receiving end compensating inductor is connected with the second parallel circuit;
one end of the second receiving end compensating inductor is connected with one end of the receiving end compensating capacitor, and a connecting point is connected with the other end of the first receiving end compensating inductor;
the other end of the second receiving end compensating inductor is connected with the high-frequency rectifying circuit; the other end of the receiving end compensation capacitor is connected with the high-frequency rectifying circuit.
Optionally, the system further comprises: receiving end direct current bus capacitor;
and the receiving end direct current bus capacitor is connected with the high-frequency rectifying circuit in parallel.
The parameter design method of the underwater single-capacitor coupling wireless charging system is realized by adopting the underwater single-capacitor coupling wireless charging system; the method comprises the following steps:
acquiring a system capacitance parameter; the system capacitance parameters include: self-capacitance of the transmitting end polar plate, self-capacitance of the receiving end polar plate, coupling capacitance of the single-capacitance coupling polar plate, self-capacitance of the high-frequency inverter circuit and self-capacitance of the high-frequency rectifying circuit;
calculating compensation parameters according to the system capacitance parameters; the compensation parameters include: the device comprises a transmitting end compensation capacitor, a receiving end compensation capacitor, a first transmitting end compensation inductor, a second receiving end compensation inductor, a second transmitting end compensation inductor and a first receiving end compensation inductor.
Optionally, calculating a compensation parameter according to the system capacitance parameter specifically includes:
calculating a transmitting end compensation capacitance and a receiving end compensation capacitance respectively according to the self capacitance of the transmitting end polar plate, the self capacitance of the receiving end polar plate and the coupling capacitance of the single capacitive coupling polar plate;
according to the transmitting end compensation capacitance and the receiving end compensation capacitance, respectively calculating a first transmitting end compensation inductance and a second receiving end compensation inductance;
calculating the second transmitting end compensation inductance according to the self capacitance of the high-frequency inverter circuit;
and calculating the first receiving end compensation inductance according to the self capacitance of the high-frequency rectifying circuit.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides an underwater single-capacitor coupling wireless charging system and a parameter design method, wherein the system comprises the following components: a high-frequency inverter circuit, a resonant circuit, and a high-frequency rectifier circuit; the high-frequency inverter circuit is used for converting direct current of the transmitting end direct current power supply into alternating current; the resonance circuit carries out voltage rising treatment on the alternating current to obtain treated alternating current, obtains energy of the treated alternating current in a wireless mode based on a coupling capacitor, and matches impedance to a resonance state through energy based on a circuit theory to obtain resonance alternating current; the high-frequency rectification circuit is used for converting the resonant alternating current into direct current; the direct current is used for supplying power to the receiving end load equipment; the underwater single-capacitor coupling wireless charging system can improve the power and efficiency of underwater single-capacitor coupling wireless charging.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of an underwater single-capacitor coupling wireless charging system provided by an embodiment of the invention;
fig. 2 is a topological structure diagram of an underwater single-capacitor coupling wireless charging system provided by an embodiment of the invention;
FIG. 3 is a flow chart of a parameter design method of an underwater single-capacitor coupling wireless charging system according to an embodiment of the present invention;
fig. 4 is an equivalent circuit diagram of an underwater single-capacitor coupling wireless charging system according to an embodiment of the present invention;
FIG. 5 is a first simplified equivalent circuit diagram of an underwater single capacitive coupling wireless charging system provided by an embodiment of the present invention;
FIG. 6 is a second simplified equivalent circuit diagram of an underwater single capacitive coupling wireless charging system provided by an embodiment of the present invention;
fig. 7 is a flow chart of parameter design according to an embodiment of the present invention.
Symbol description:
the high-frequency inverter circuit-1, the resonant circuit-2, the high-frequency rectifying circuit-3, the transmitting end resonant circuit-4, the single-capacitance coupling polar plate-5, the receiving end resonant circuit-6 and the transmitting end direct-current power supply-U d Receiving end load device-R L First transmitting end compensating inductance-L p Second transmitting end compensating inductance-L f1 Transmitting end compensation capacitor-C p First receiving end compensating inductance-L f2 Second receiving end compensating inductance-L s Receiving end compensation capacitor-C s Polar plate of transmitting terminal-P 1 Polar plate of receiving terminal-P 2 Coupling capacitance-C m DC bus capacitor-C at receiving end o First field effect transistor-G 1 Second field effect transistor-G 2 Third field effect transistor-G 3 Fourth field effect transistor-G 4 First diode-D 1 First diode-D 2 First diode-D 3 First diode-D 4 。
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide an underwater single-capacitor coupling wireless charging system and a parameter design method, which are used for improving the power and efficiency of underwater single-capacitor coupling wireless charging.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
As shown in fig. 1, an embodiment of the present invention provides an underwater single-capacitor coupling wireless charging system, which includes: a high-frequency inverter circuit 1, a resonance circuit 2, and a high-frequency rectifier circuit 3.
High-frequency inverter circuit 1 and transmitting end direct current power supply U d Connecting; the resonance circuit 2 is connected with the high-frequency inverter circuit 1; high-frequency rectifying circuit 3 and receiving-side load device R L And (5) connection.
The high-frequency inverter circuit 1 is used for using a transmitting end direct current power supply U d Is converted into alternating current. So that a high frequency electric field is generated in the single capacitive coupling plate 5 to achieve wireless energy transfer.
The resonance circuit 2 is used for carrying out voltage rising treatment on the alternating current to obtain treated alternating current; the resonance circuit 2 is used for acquiring the energy for processing alternating current in a wireless mode based on the coupling capacitance; the resonant circuit 2 is also used to match the impedance to a resonant state by energy based on circuit theory, resulting in a resonant alternating current.
The high-frequency rectification circuit 3 is used for converting resonant alternating current into direct current; direct current is used for loading equipment R to receiving end L And (5) supplying power. Receiving end load device R L May be an electrical load or a battery of the subsea equipment.
Fig. 2 is a topological structure diagram of an underwater single-capacitor coupling wireless charging system. As shown in fig. 1 and 2, specifically, the resonance circuit 2 includes: a transmitting-end resonant circuit 4, a single capacitive coupling plate 5 and a receiving-end resonant circuit 6.
The transmitting end resonant circuit 4 is connected with the high-frequency inverter circuit 1; the single capacitive coupling polar plate 5 is respectively connected with the transmitting end resonant circuit 4 and the receiving end resonant circuit 6; the receiving-side resonant circuit 6 is connected to the high-frequency rectifying circuit 3.
The transmitting-end resonant circuit 4 is used for carrying out voltage rising treatment on alternating current to obtain treated alternating current.
Wherein the transmitting-end resonant circuit 4 includes: first parallel circuit and second transmitting end compensating inductance L f1 The method comprises the steps of carrying out a first treatment on the surface of the The first parallel circuit includes: parallel transmitting end compensation capacitor C p And a first transmitting terminal complementCompensation inductance L p 。
Second transmitting end compensating inductance L f1 Is connected with the first parallel circuit; second transmitting end compensating inductance L f1 The other end of (2) is connected with the transmitting terminal polar plate P 1 And (5) connection.
First transmitting end compensating inductance L p Is connected with the high-frequency inverter circuit 1; transmitting end compensation capacitor C p Is connected with the high-frequency inverter circuit 1; first transmitting end compensating inductance L p The other end of (C) and the transmitting end compensating capacitor p Is connected with the other end of the second transmitting terminal compensation inductance L f1 Is connected to one end of the connecting rod.
The receiving-end resonant circuit 6 is used for matching impedance to a resonant state based on circuit theory through energy to obtain resonant alternating current.
Specifically, the receiving-side resonance circuit 6 includes: second parallel circuit and first receiving end compensating inductance L f2 The method comprises the steps of carrying out a first treatment on the surface of the The second parallel circuit includes: parallel second receiving end compensating inductance L s And a receiving end compensation capacitor C s 。
First receiving end compensating inductance L f2 One end of (a) and a receiving end polar plate P 2 Connecting; first receiving end compensating inductance L f2 The other end of which is connected to a second parallel circuit.
Second receiving end compensating inductance L s Compensating capacitor C at one end and the receiving end of (2) s Is connected with one end of the first receiving end compensating inductance L f2 Is connected with the other end of the connecting rod; second receiving end compensating inductance L s The other end of the first power supply is connected with a high-frequency rectifying circuit 3; receiving end compensation capacitor C s The other end of (2) is connected to a high-frequency rectifying circuit 3.
The single capacitive coupling plate 5 is used to form a coupling capacitance C m And the energy for processing the alternating current is obtained in a wireless mode.
Wherein the single capacitive coupling plate 5 comprises: transmitting terminal plate P 1 And a receiving end polar plate P 2 The method comprises the steps of carrying out a first treatment on the surface of the Transmitting terminal plate P 1 Is connected with the transmitting end resonant circuit 4; receiving-end polar plate P 2 Is connected with the receiving-end resonant circuit 6.
Transmitting terminal plate P 1 And a receiving end polar plate P 2 Coupling to obtain a coupling capacitor C m 。
Specifically, the emitter end plate P 1 And a receiving end polar plate P 2 Are square aluminum plates and the transmitting end polar plate P 1 And a receiving end polar plate P 2 The distance between them is 1 meter.
The aluminum plates are embedded in the waterproof shell to realize electrical insulation, and the two aluminum plates are separated by 1 meter and placed in seawater with the conductivity of 3.5S/m.
As shown in fig. 2, the high-frequency inverter circuit 1 is composed of a first fet-G 1 Second field effect transistor-G 2 Third field effect transistor-G 3 And fourth field effect transistor-G 4 Composition; the high-frequency rectifying circuit 3 is formed of a first diode-D 1 First diode-D 2 First diode-D 3 And a first diode-D 4 Composition is prepared.
As an optional implementation manner, the present invention further provides an underwater single-capacitor coupling wireless charging system, further comprising: receiving end direct current bus capacitor C o . Receiving end direct current bus capacitor C o In parallel with the high frequency rectifying circuit 3.
Example 2
The embodiment of the invention provides a parameter design method of an underwater single-capacitor coupling wireless charging system, which is realized by adopting the underwater single-capacitor coupling wireless charging system in the embodiment 1.
As shown in fig. 3, the method includes:
step 100: and acquiring a system capacitance parameter. Wherein, the system capacitance parameters include: the self-capacitance of the transmitting end polar plate, the self-capacitance of the receiving end polar plate, the coupling capacitance of the single-capacitance coupling polar plate, the self-capacitance of the high-frequency inverter circuit and the self-capacitance of the high-frequency rectifying circuit.
Step 200: and calculating compensation parameters according to the system capacitance parameters. Wherein the compensation parameters include: the device comprises a transmitting end compensation capacitor, a receiving end compensation capacitor, a first transmitting end compensation inductor, a second receiving end compensation inductor, a second transmitting end compensation inductor and a first receiving end compensation inductor.
The compensation parameter is calculated according to the system capacitance parameter, and specifically comprises the following steps:
and calculating a transmitting end compensation capacitance and a receiving end compensation capacitance respectively according to the self capacitance of the transmitting end polar plate, the self capacitance of the receiving end polar plate and the coupling capacitance of the single-capacitance coupling polar plate.
And respectively calculating a first transmitting end compensation inductance and a second receiving end compensation inductance according to the transmitting end compensation capacitance and the receiving end compensation capacitance.
And calculating a second transmitting end compensation inductance according to the self capacitance of the high-frequency inverter circuit.
And calculating a first receiving end compensation inductance according to the self capacitance of the high-frequency rectifying circuit.
Specifically, as shown in FIG. 4, U s Is an equivalent voltage source when the high-frequency inverter circuit only considers fundamental waves, R eq Is the equivalent resistance of the high frequency rectifying circuit, they satisfy the following formula:
c in FIG. 4 inv And C rec Is the self-capacitance of the high-frequency inverter circuit and the high-frequency rectifier circuit to the reference ground, C mp And C ms Respectively the emitting end polar plates P 1 And a receiving end polar plate P 2 Self capacitance to ground. In practical application, C inv 、C rec 、C mp 、C ms 、C m The values of (2) can be measured by LCR tables.
A further equivalent circuit of the underwater single-capacitor coupled wireless charging system is shown in fig. 5. To eliminate C inv And C rec The invention provides an LCL-LCL compensation circuit, namely adding L in a transmitting end resonant circuit f1 Adding L into receiving end resonant circuit f2 Let L f1 And C inv 、L f2 And C rec The resonant frequency of (2) is the system operating frequency, at which the branch impedance Z f1 And Z f2 The tabuable values are:
wherein omega c Is the working angular frequency of the system, and satisfies the following formula:
thus, the branch impedance Z f1 And Z f2 At system operating angular frequency ω=ω c The value at that time is 0. Meanwhile, the equivalent capacitance C in FIG. 5 pp And C ss Can be expressed as:
based on the above analysis, a further equivalent circuit of the underwater single-capacitor coupling wireless charging system provided by the invention is shown in fig. 6. According to the circuit theorem, the output current I can be obtained out The method comprises the following steps:
some of the variables in the above formula satisfy:
fig. 7 is a parameter design flow of the underwater single-capacitor coupling wireless charging system in practical application, and the specific steps are as follows:
(1) Determining the operating angular frequency omega of a system c DC power supply U of transmitting end d Output current I out 。
(2) Self-capacitance C of two polar plates, namely a transmitting end polar plate and a receiving end polar plate, is respectively measured by using LCR meter mp 、C ms And mutual capacitance, i.e. coupling capacitance C m The high-frequency inverter circuit and the high-frequency rectifier circuit are grounded to the reference groundSelf-capacitance C of (2) inv And C rec 。
(3) Assuming symmetric system parameters, calculate C using (7) pp And C ss Is the value of (1):
(4) Calculation of C using (8) p 、C s Is the value of (1):
(5) Calculate L using (9) p 、L s Is the value of (1):
(6) Calculation of L using (10) f1 And L f2 Is the value of (1):
the underwater single-capacitor coupling wireless charging system based on LCL-LCL compensation, disclosed by the invention, can be used for improving the power and efficiency of the underwater single-capacitor coupling wireless charging system while overcoming the disadvantages of the existing single-capacitor wireless charging system with double-side LC compensation.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the system of the present invention and its core ideas; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (9)
1. An underwater single capacitive coupling wireless charging system, the system comprising: a high-frequency inverter circuit, a resonant circuit, and a high-frequency rectifier circuit;
the high-frequency inverter circuit is connected with a transmitting end direct-current power supply; the resonant circuit is connected with the high-frequency inverter circuit; the high-frequency rectifying circuit is connected with receiving end load equipment;
the high-frequency inverter circuit is used for converting direct current of the transmitting-end direct current power supply into alternating current;
the resonant circuit is used for:
carrying out voltage rising treatment on the alternating current to obtain treated alternating current;
acquiring the energy of the processing alternating current in a wireless mode based on a coupling capacitor;
matching impedance to a resonance state through the energy based on a circuit theory to obtain resonance alternating current;
the high-frequency rectifying circuit is used for converting the resonant alternating current into direct current; the direct current is used to power the receiving end load device.
2. The underwater single capacitive coupling wireless charging system of claim 1, wherein the resonant circuit comprises: the device comprises a transmitting end resonant circuit, a single capacitive coupling polar plate and a receiving end resonant circuit;
the transmitting end resonant circuit is connected with the high-frequency inverter circuit; the single capacitive coupling polar plate is respectively connected with the transmitting end resonant circuit and the receiving end resonant circuit; the receiving end resonant circuit is connected with the high-frequency rectifying circuit;
the transmitting end resonant circuit is used for carrying out voltage rising treatment on the alternating current to obtain treated alternating current;
the single capacitive coupling polar plate is used for forming a coupling capacitor and acquiring the energy of the processing alternating current in a wireless mode;
the receiving end resonant circuit is used for matching impedance to a resonant state through the energy based on a circuit theory, and resonant alternating current is obtained.
3. The underwater single capacitive coupling wireless charging system of claim 2, wherein the single capacitive coupling plate comprises: a transmitting end polar plate and a receiving end polar plate;
the transmitting end polar plate is connected with the transmitting end resonant circuit; the receiving end polar plate is connected with the receiving end resonant circuit;
and the transmitting end polar plate and the receiving end polar plate are coupled to obtain a coupling capacitor.
4. The underwater single capacitive coupling wireless charging system of claim 3, wherein the transmitting end plate and the receiving end plate are both square aluminum plates, and the distance between the transmitting end plate and the receiving end plate is 1 meter.
5. The underwater single capacitive coupling wireless charging system of claim 3, wherein the transmitting-end resonant circuit comprises: the first parallel circuit and the second transmitting end compensate the inductance; the first parallel circuit includes: the transmitting end compensation capacitor and the first transmitting end compensation inductor are connected in parallel;
one end of the second transmitting end compensating inductor is connected with the first parallel circuit; the other end of the second transmitting end compensating inductor is connected with the transmitting end polar plate;
one end of the first transmitting end compensating inductor is connected with the high-frequency inverter circuit; one end of the transmitting end compensation capacitor is connected with the high-frequency inverter circuit; the other end of the first transmitting end compensating inductor is connected with the other end of the transmitting end compensating capacitor, and the connecting point is connected with one end of the second transmitting end compensating inductor.
6. The underwater single capacitive coupling wireless charging system of claim 3, wherein the receiving-end resonant circuit comprises: the second parallel circuit and the first receiving end compensate the inductance; the second parallel circuit includes: the second receiving end compensating inductor and the receiving end compensating capacitor are connected in parallel;
one end of the first receiving end compensating inductor is connected with the receiving end polar plate; the other end of the first receiving end compensating inductor is connected with the second parallel circuit;
one end of the second receiving end compensating inductor is connected with one end of the receiving end compensating capacitor, and a connecting point is connected with the other end of the first receiving end compensating inductor;
the other end of the second receiving end compensating inductor is connected with the high-frequency rectifying circuit; the other end of the receiving end compensation capacitor is connected with the high-frequency rectifying circuit.
7. The underwater single capacitive coupling wireless charging system of claim 1, wherein the system further comprises: receiving end direct current bus capacitor;
and the receiving end direct current bus capacitor is connected with the high-frequency rectifying circuit in parallel.
8. A parameter design method of an underwater single-capacitor coupling wireless charging system, which is characterized in that the method is realized by adopting the underwater single-capacitor coupling wireless charging system according to any one of claims 1-7; the method comprises the following steps:
acquiring a system capacitance parameter; the system capacitance parameters include: self-capacitance of the transmitting end polar plate, self-capacitance of the receiving end polar plate, coupling capacitance of the single-capacitance coupling polar plate, self-capacitance of the high-frequency inverter circuit and self-capacitance of the high-frequency rectifying circuit;
calculating compensation parameters according to the system capacitance parameters; the compensation parameters include: the device comprises a transmitting end compensation capacitor, a receiving end compensation capacitor, a first transmitting end compensation inductor, a second receiving end compensation inductor, a second transmitting end compensation inductor and a first receiving end compensation inductor.
9. The method for designing parameters of an underwater single-capacitive-coupling wireless charging system according to claim 8, wherein calculating compensation parameters according to the system capacitance parameters comprises:
calculating a transmitting end compensation capacitance and a receiving end compensation capacitance respectively according to the self capacitance of the transmitting end polar plate, the self capacitance of the receiving end polar plate and the coupling capacitance of the single capacitive coupling polar plate;
according to the transmitting end compensation capacitance and the receiving end compensation capacitance, respectively calculating a first transmitting end compensation inductance and a second receiving end compensation inductance;
calculating the second transmitting end compensation inductance according to the self capacitance of the high-frequency inverter circuit;
and calculating the first receiving end compensation inductance according to the self capacitance of the high-frequency rectifying circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311585123.1A CN117639288A (en) | 2023-11-27 | 2023-11-27 | Underwater single-capacitor coupling wireless charging system and parameter design method |
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| CN202311585123.1A CN117639288A (en) | 2023-11-27 | 2023-11-27 | Underwater single-capacitor coupling wireless charging system and parameter design method |
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