CN116317213B - Stacked capacitor transmission coupler - Google Patents
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- CN116317213B CN116317213B CN202310291646.9A CN202310291646A CN116317213B CN 116317213 B CN116317213 B CN 116317213B CN 202310291646 A CN202310291646 A CN 202310291646A CN 116317213 B CN116317213 B CN 116317213B
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Classifications
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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
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/224—Housing; Encapsulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/30—Stacked capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/38—Multiple capacitors, i.e. structural combinations of fixed capacitors
-
- 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
- H02J50/05—Circuit arrangements or systems for wireless supply or distribution of electric power using capacitive coupling
Abstract
The application discloses a stacked capacitive transmission coupler, including: the coupler transmitting end comprises a first polar plate and a second polar plate which are mutually stacked and arranged at intervals; the coupler receiving end comprises a fourth polar plate and a third polar plate which are mutually stacked and arranged at intervals; a filling dielectric medium is arranged between the first polar plate and the second polar plate and between the fourth polar plate and the third polar plate; and the electric energy transmission is realized between the coupler transmitting end and the coupler receiving end through a transmission medium, and the relative dielectric constant of the filling dielectric medium is smaller than that of the transmission medium. The method can solve the problem that the transmission efficiency of the existing stacked capacitive coupler is low due to the fact that the equivalent self capacitance formed by the adjacent electrode plates is large.
Description
Technical Field
The present application relates to the field of wireless power transfer technology, and more particularly, to a stacked capacitive transfer coupler.
Background
In recent years, wireless charging markets are vigorously developed, and related technology and advanced manufacturing development have achieved a lot of exciting results, so that wireless power transmission is applied to the fields of consumer electronics, industrial electricity, new energy automobiles, electric ships and the like.
Currently, the mainstream wireless power transmission technologies mainly include two types, namely, inductive wireless power transmission (Inductive Power Transfer, IPT) and capacitive wireless power transmission (Capacitive Power Transfer, CPT). IPT energy transfer through coupling of magnetic fields, thus IPT couplers require coils, magnetic cores to excite magnetic fields, which are relatively high in weight and cost; CPT carries out energy transmission through electric field coupling, so CPT coupler only needs the metal sheet to activate the electric field, and its weight and cost are lower. In addition, because the electric field is insensitive to the surrounding metal environment and no eddy current loss is generated in the metal foreign matters, the CPT technology has higher safety than the IPT technology and has good development prospect.
CPT systems also suffer from drawbacks in that CPT couplers are typically more bulky than IPT couplers because two pairs of plates are required to form a complete loop. An effective solution is to use a Stacked Coupler (Vertical Coupler) structure, also known as a Compact Coupler (Compact Coupler), which was first proposed by the university of san diego, usa, chis Mi teaching team in 2016, which vertically aligns the transmission plates instead of the conventional horizontal arrangement, thereby greatly reducing the floor space in the horizontal direction.
However, the cross coupling effect exists between the plates of the laminated coupler, so that the equivalent mutual capacitance is smaller, the distance between the plates on the same side is very close, the formed equivalent self capacitance is larger, the capacitive coupling coefficient is very low, the transmission efficiency of the system is obviously affected, the highest efficiency of the laminated CPT system is about 85%, and the lower efficiency of the laminated coupler becomes the biggest obstacle restricting the application of the laminated coupler in a high-power wireless charging scene such as an electric automobile or an electric ship.
Disclosure of Invention
Aiming at least one defect or improvement requirement of the prior art, the invention provides a laminated capacitive transmission coupler, which aims to solve the problem that the transmission efficiency of the conventional laminated capacitive coupler is low due to the fact that the equivalent self capacitance formed by the adjacent polar plates is large.
To achieve the above object, according to a first aspect of the present invention, there is provided a laminated capacitive transmission coupler comprising: the coupler transmitting end comprises a first polar plate and a second polar plate which are mutually stacked and arranged at intervals; the coupler receiving end comprises a fourth polar plate and a third polar plate which are mutually stacked and arranged at intervals; a filling dielectric medium is arranged between the first polar plate and the second polar plate and between the fourth polar plate and the third polar plate; and the electric energy transmission is realized between the coupler transmitting end and the coupler receiving end through a transmission medium, and the relative dielectric constant of the filling dielectric medium is smaller than that of the transmission medium.
In one embodiment of the present invention, the coupler transmitting end further includes: the first insulating cavity is used for wrapping the first polar plate, the second polar plate and the filling dielectric medium between the first polar plate and the second polar plate; the coupler receiving end further comprises: and the second insulating cavity is used for wrapping the fourth polar plate, the third polar plate and the filling dielectric medium between the fourth polar plate and the third polar plate.
In one embodiment of the invention, the first insulating cavity and the second insulating cavity are spliced into a hollow cuboid structure by six insulating plates with the same thickness.
In one embodiment of the present invention, the first electrode plate and the second electrode plate are respectively attached to inner walls of two opposite sides of the first insulating cavity, the fourth electrode plate and the third electrode plate are respectively attached to inner walls of two opposite sides of the second insulating cavity, and the filling dielectric fills the inner spaces of the first insulating cavity and the second insulating cavity.
In one embodiment of the present invention, the fourth polar plate and the second polar plate, which are close to each other, are equal in area and opposite to each other between the coupler transmitting end and the coupler receiving end, and the first polar plate and the third polar plate, which are far away from each other, are equal in area and opposite to each other.
In one embodiment of the present invention, the first plate and the second plate have the same area, and the fourth plate and the third plate have the same area.
In one embodiment of the present invention, the first plate has an area greater than the second plate and the fourth plate has an area greater than the third plate.
In one embodiment of the invention, the filler dielectric is epoxy and the transmission medium is water.
According to a second aspect of the present invention, there is also provided a stacked capacitive transmission system comprising: a stacked capacitive transmission coupler as in any one of the embodiments above; transmitting-side circuitry comprising: a power supply, an inverter and a compensation network; the output end of the power supply is connected with the input end of the inverter, and the output end of the inverter is connected with the polar plate of the transmitting end of the coupler through the compensation network; a receiver circuit comprising: a compensation network and a rectifier; and the polar plate at the receiving end of the coupler is connected with the rectifier through the compensation network.
In general, compared with the prior art, the above technical solutions conceived by the present invention can achieve at least the following beneficial effects:
1) By filling insulating materials with lower relative dielectric constants than transmission media between two polar plates on the same side of the laminated capacitive coupler, the capacitance value formed between the polar plates on the same side is reduced, so that the equivalent self capacitance is reduced, the capacitive coupling coefficient of the coupler is increased, and compared with a traditional laminated coupler with the same all capacitive dielectrics, the electric energy transmission efficiency can be remarkably improved;
2) The increased capacitive coupling coefficient is realized through a mixed medium technology instead of increasing the distance between two polar plates on the same side of the laminated capacitive coupler, so that the thickness of the laminated capacitive coupler in the vertical direction is smaller under the level of the same coupling coefficient, and the laminated capacitive coupler has smaller floor area in the horizontal direction compared with the horizontal polar plate structure due to the adoption of the laminated polar plate structure, thereby being more beneficial to the installation on an electric vehicle or an electric ship;
3) The laminated capacitive coupler is coated by the insulating layer, so that the characteristics of water resistance, corrosion resistance, electric shock resistance and electric leakage resistance can be realized, the scheme cost is low, the implementation is easy, the practical requirements of electric vehicles/boats are met, and the laminated capacitive coupler is also suitable for complex environments such as underwater environments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic three-dimensional structure of a stacked capacitive transmission coupler according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a stacked capacitive transmission coupler according to an embodiment of the present invention;
fig. 3 is a schematic diagram of dimensions and placement positions of components of a stacked capacitive transmission coupler according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a stacked capacitor transmission system according to an embodiment of the present invention;
fig. 5 is a schematic diagram of forming a capacitor between plates of a stacked capacitive transmission coupler according to an embodiment of the present invention;
fig. 6 is an equivalent circuit diagram of a stacked capacitor transmission system according to an embodiment of the present invention;
fig. 7 is a waveform diagram of output voltage and current of an inverter of a stacked capacitor transmission system according to an embodiment of the present invention;
fig. 8 is a waveform diagram of output voltage and current of a rectifier of a stacked capacitor transmission system according to an embodiment of the present invention;
fig. 9 is a waveform diagram of voltages at front and rear ends of a coupling capacitor in a stacked capacitor transmission system according to an embodiment of the present invention;
fig. 10 is a graph comparing power transmission efficiency of a stacked capacitive transmission coupler according to an embodiment of the present invention with that of a conventional stacked capacitive transmission coupler.
Description of the reference numerals
P1: a first plate; p2: a second polar plate; p3: a third plate; p4: a fourth polar plate; e1, E2: filling a dielectric; i1: a first insulating cavity; i2: a second insulating cavity; v (V) in : a voltage source; v (V) out : constant voltage load; s is S 1 、S 2 、S 3 、S 4 : an inverter switching tube; d (D) 1 、D 2 、D 3 、D 4 : a rectifier switching tube; l (L) f1 、L f2 : compensating the inductance; r is R L : a load resistor; c (C) L : a load capacitance; c (C) p1 、C p2 : equivalent self-capacitance; c (C) M : equivalent mutual capacitance.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The terms first, second, third and the like in the description and in the claims of the application and in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1 and 2, a first embodiment of the present invention proposes a stacked capacitive transmission coupler, for example, including: the first polar plate P1, the second polar plate P2, the third polar plate P3, the fourth polar plate P4, the filling dielectric E1 and the filling dielectric E2.
The first polar plate P1, the second polar plate P2, and the filling dielectric E1 together form a coupler transmitting end, and the fourth polar plate P4, the third polar plate P3, and the filling dielectric E2 together form a coupler receiving end. And electric energy transmission is realized between the coupler transmitting end and the coupler receiving end through a transmission medium.
Specifically, the first electrode plate P1 and the second electrode plate P2 are stacked and spaced apart from each other, and the filling dielectric E1 is disposed between the first electrode plate P1 and the second electrode plate P2; the fourth electrode plate P4 and the third electrode plate P3 are stacked on each other with a gap therebetween, and the filling dielectric E2 is disposed between the fourth electrode plate P4 and the third electrode plate P3. The first polar plate P1, the second polar plate P2, the third polar plate P3 and the fourth polar plate P4 are all made of metal materials. The filling dielectric E1 and the filling dielectric E2 are both insulating materials, and the relative dielectric constant of the filling dielectric is smaller than that of the transmission medium.
In one embodiment, the coupler transmitting end further comprises a first insulating cavity I1, the coupler receiving end further comprises a second insulating cavity I2, the first insulating cavity I1 and the second insulating cavity I2 are made of insulating materials, for example, a hollow cuboid structure formed by splicing six insulating plates with identical thickness, and the function is to completely wrap two polar plates of the corresponding coupler transmitting end or coupler receiving end and a filling dielectric medium arranged between the two polar plates.
For the convenience of the embodiment, the first plate P1, the second plate P2, the third plate P3, and the fourth plate P4 may have a square plate structure. As shown in the figure3, in one embodiment, the first plate P1 has a dimension l 1 * l 1 The second polar plate P2 has a size of l 2 *l 2 The third plate P3 has a size of l 3 *l 3 The fourth plate has a size of l 4 *l 4 。
For the transmitting end of the coupler, the first polar plate P1 and the second polar plate P2 are in a vertically stacked relationship and are kept in parallel, P1 is located on the outer side of the power transmission direction, and P2 is located on the inner side of the power transmission direction. The first polar plate P1 is tightly attached to one surface of the first insulating cavity I1, the second polar plate P2 is tightly attached to the other surface of the first insulating cavity I1 opposite to the first polar plate P1, and the vertical distance between the first polar plate P1 and the second polar plate P2 is d 1 . Further, the first electrode plate P1 and the second electrode plate P2 are both in a flat plate structure, and the flat plate areas can be the same or different, and if the areas are different, the area of P1 must be larger than that of P2. Preferably, the area of the polar plate P1 is larger than P2, and the horizontal distance from the polar plate P2 to the edge of the polar plate P1 is l e1 Obviously, l 1 =l 2 +2*l e1 。
For the coupler receiving end, the third polar plate P3 and the fourth polar plate P4 are in a vertically stacked relationship and are kept in parallel, P3 is located on the outer side of the power transmission direction, and P4 is located on the inner side of the power transmission direction. The third polar plate P3 is tightly attached to one surface of the second insulating cavity I2, the fourth polar plate P4 is tightly attached to the other surface of the second insulating cavity I2 opposite to the first polar plate P4, and the vertical distance between the third polar plate P3 and the fourth polar plate P4 is d 2 . Further, the third polar plate P3 and the fourth polar plate P4 are both flat structures, and the areas of the flat plates may be the same or different, and if the areas are different, the area of P3 must be larger than that of P4. Preferably, the area of the polar plate P3 is larger than P4, and the horizontal distance from the polar plate P4 to the edge of the polar plate P3 is l e2 Obviously, l 3 =l 4 +2*l e2 。
Preferably, all the first polar plate P1 to the second polar plate P2 are filled with dielectric E1, the transmission dielectric is fresh water (the relative dielectric constant is 81), the filled dielectric E1 is epoxy resin (the relative dielectric constant is 3.6), and the relative dielectric constant of the filling material is smaller than that of the transmission dielectric. While the third plate P3 to the fourth plate P4 are all filled with a dielectric E2, and epoxy resin is also selected. Preferably, the first insulating cavity I1 and the second insulating cavity I2 are formed by splicing 6 insulating plates made of epoxy plates with identical thickness, and the thickness of each epoxy plate is 1mm.
In one embodiment, the first and third plates P1 and P3 have the same shape and area, and the second and fourth plates P2 and P4 have the same shape and area. In the wireless power transmission process, the transmitting end of the coupler is opposite to the receiving end of the coupler, so that the first polar plate P1 is opposite to the third polar plate P3, and the second polar plate P2 is opposite to the fourth polar plate P4. The transmission distance from the transmitting end of the coupler to the receiving end of the coupler is d.
As shown in fig. 4, when the wireless power transmission is performed, the first polar plate P1 and the second polar plate P2 are connected to the transmitting end circuit, and the third polar plate P3 and the fourth polar plate P4 are connected to the receiving end circuit. According to the mechanism of capacitance generation, an equivalent capacitance is generated between every two plates, and the capacitance between the first polar plate P1 and the second polar plate P2 is C 12 The capacitance between the first polar plate P1 and the third polar plate P3 is C 13 And so on, C is generated between the four plates 12 -C 34 And 6 equivalent capacitors.
As shown in fig. 6, according to the serial-parallel relationship of the 6 capacitors, the serial-parallel relationship can be equivalent to 3 capacitors in the circuit, namely 2 self-capacitors C p1 、C p2 And 1 mutual capacitance C M . Further, in order to calculate the area of equivalent self capacitance and mutual capacitance, specific dimension parameters of the coupler are assigned as follows: l (L) 1 =l 3 =300mm，l 2 =l 4 =250 mm，l e1 =l e2 =50 mm. The vertical distance from the polar plate P1 to the polar plate P2 is d 1 =10 mm. The vertical distance from the polar plate P3 to the polar plate P4 is d 2 =10mm. Transmission distance d=100 mm.
The filling dielectric E1 and the filling dielectric E2 are both epoxy resins, the relative dielectric constant thereof is 3.6, the transmission medium is fresh water, and the relative dielectric constant thereof is 81. The relative dielectric constant of the filling material is smaller than that of the transmission medium. The material of the first insulating cavity I1 and the second insulating cavity I2 is an epoxy plate, and the relative dielectric constant of the epoxy plate is 4.4.
Obtaining capacitance value C of 6 capacitors between any two plates through finite element simulation 12 -C 34 。
C 12 =254.41pF，C 13 =309.95pF，C 14 =93.483pF，C 23 =93.745pF，C 24 =170.93pF， C 34 =254.11pF。
Based on the above 6 capacitors, calculating a series-parallel equation to obtain an equivalent capacitance value C in the equivalent circuit of wireless power transmission M 、C p1 、C p2 The calculation formula is as follows:
；
；
。
calculating to obtain an equivalent capacitance value C p1 =414.23pF，C p2 =414.23pF，C M =66.181pF。
The capacitive coupling coefficient is calculated according to the equivalent capacitance value, and the calculation formula is as follows:
the capacitive coupling coefficient is calculated to be k=0.159.
In the embodiment, an S-S compensation network is selected and used according to the equivalent capacitance value C of the coupler p1 、C p2 、C M Calculating parameter L of compensation inductance of wireless power transmission system f1 =L f2 =52.8uH。
Emulation of a system using Lttpice emulation software, setting L f1 、L f2 The figures of merit of (C) are all 500 p1 、C p2 、C M The quality factor of (a) is set to 1000 and the inverter frequency is set to 1MHz. As shown in fig. 7, the inverterThe output voltage is rectangular wave, the output current is sine wave, and from the view of voltage current phase, the inverter switching tube realizes ZVS soft switching. As shown in fig. 8, the rectifier input voltage is rectangular wave and the input current is sinusoidal wave. As shown in fig. 9, the voltages before and after the coupling capacitor are sine waves, the amplitudes are equal, and the phases are about 88 degrees apart. As shown in fig. 10, adjusting the output power yields an efficiency curve for the full power range with a peak efficiency of 94.8%.
In order to better demonstrate the advantages of the stacked capacitive transmission coupler provided in this embodiment in terms of the capacitive coupling coefficient and the transmission efficiency, the stacked capacitive transmission coupler is compared with a conventional stacked coupler, in which the filling dielectric E1 and the filling dielectric E2 are all set to be the same as the transmission medium, for example, all are fresh water, and the relative dielectric constants are all 81.
Obtaining capacitance value C of 15 capacitors between any two plates through finite element simulation 12 -C 34 。
C 12 =901.57pF，C 13 =484.21pF，C 14 =112.97pF，C 23 =113pF，C 24 =141.27pF，C 34 = 901.49pF. The equivalent capacitance value C is calculated based on the above 6 capacitances p1 =1079.9pF，C p2 =1079.9pF，C M =65.346pF。
And calculating according to the equivalent capacitance value to obtain the capacitance coupling coefficient of k=0.061. It can be seen that the coupling coefficient is significantly smaller than that of the stacked capacitive transmission coupler provided in this embodiment.
An S-S compensation network is also selected and used according to the equivalent capacitance value C of the coupler p1 、C p2 、C M Calculating parameter L of compensation inductance of wireless power transmission system f1 =L f2 =22.1uH。
Simulating a system by using Ltpipce simulation software, keeping consistent with the simulation of the stacked mixed medium capacitive coupler, and setting L f1 、L f2 The figures of merit of (C) are all 500 p1 、C p2 、C M The quality factors of (2) are all 1000, and the inverter frequency is set to 1MHz. As shown in fig. 9, the output power is adjusted to obtain an efficiency curve of the full power range of the conventional laminated couplerThe line peak efficiency was 84.7% and the transmission efficiency was lower than the stacked hybrid capacitive coupler over the full power range.
Therefore, under the condition that the conditions of the size of the coupler, the type of the compensation network, the quality factor of the device, the frequency of the inverter, the transmission distance and the like are all the same, compared with the traditional laminated coupler, the capacitive coupling coefficient of the capacitive wireless power transmission coupler provided by the embodiment is obviously improved, and the transmission efficiency of the system is greatly improved.
In summary, in the stacked capacitive transmission coupler provided in the first embodiment of the present invention, by filling the insulating material with a lower relative dielectric constant than the transmission medium between the two electrode plates on the same side of the stacked capacitive transmission coupler, the capacitance formed between the electrode plates on the same side is reduced, so as to reduce the equivalent self-capacitance, further increase the capacitive coupling coefficient of the coupler, and significantly improve the electric energy transmission efficiency compared with the conventional stacked capacitive transmission coupler with the same capacitive dielectric; the increased capacitive coupling coefficient is realized through a mixed medium technology instead of increasing the distance between two polar plates on the same side of the laminated capacitive coupler, so that the thickness of the laminated capacitive coupler in the vertical direction is smaller under the level of the same coupling coefficient, and the laminated capacitive coupler has smaller floor area in the horizontal direction compared with the horizontal polar plate structure due to the adoption of the laminated polar plate structure, thereby being more beneficial to the installation on an electric vehicle or an electric ship; the laminated capacitive coupler is coated by the insulating layer, so that the characteristics of water resistance, corrosion resistance, electric shock resistance and electric leakage resistance can be realized, the scheme cost is low, the implementation is easy, the practical requirements of electric vehicles/boats are met, and the laminated capacitive coupler is also suitable for complex environments such as underwater environments.
It should be noted that the shape of the plates of the stacked capacitive transmission coupler according to the first embodiment is not limited, and the relative positional relationship between the plates in the embodiment of the present invention is included in the protection scope of the present invention. The specific material of the filling dielectric is not limited, and any state of solid, liquid and gas is possible, so long as the relative dielectric constant is smaller than that of the transmission medium, and the material is included in the protection scope of the present invention.
In addition, the second embodiment of the present invention further proposes a stacked capacitor transmission system, as shown in fig. 4, for example, including: the stacked capacitive transmission coupler, the transmitting-side circuit, and the receiving-side circuit as described in the first embodiment.
The transmitting end circuit comprises a power supply, an inverter and a compensation network, wherein the output end of the power supply is connected with the input end of the inverter, and the output end of the inverter is connected with the polar plate of the transmitting end of the coupler through the compensation network. The receiving end circuit comprises a compensation network and a rectifier, and the polar plate of the receiving end of the coupler is connected with the rectifier through the compensation network.
The specific structure of the stacked capacitive transmission coupler and the functions implemented by the same may be described with reference to the first embodiment, which will not be described in detail herein, and the beneficial effects of the present embodiment are the same as those of the foregoing first embodiment, and are not described herein for brevity.
It should be noted that, as a component in the stacked capacitive transmission system, the stacked capacitive transmission coupler provided in the embodiment of the present invention may have various combinations with other components, and thus has various specific embodiments. In the second embodiment, a full-bridge inverter, a full-bridge rectifier and an S-S compensation network are adopted, and those skilled in the art will readily understand that other forms of inverters, rectifiers and compensation networks can be used in combination with the coupler provided by the present invention, and all the forms are included in the protection scope of the present invention.
The foregoing is merely exemplary embodiments of the present disclosure and is not intended to limit the scope of the present disclosure. That is, equivalent changes and modifications are contemplated by the teachings of this disclosure, which fall within the scope of the present disclosure. Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a scope and spirit of the disclosure being indicated by the claims.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (9)
1. A stacked capacitive transmission coupler, comprising:
the coupler transmitting end comprises a first polar plate and a second polar plate which are mutually stacked and arranged at intervals;
the coupler receiving end comprises a third polar plate and a fourth polar plate which are mutually stacked and arranged at intervals;
a filling dielectric medium is arranged between the first polar plate and the second polar plate and between the fourth polar plate and the third polar plate;
and the electric energy transmission is realized between the coupler transmitting end and the coupler receiving end through a transmission medium, and the relative dielectric constant of the filling dielectric medium is smaller than that of the transmission medium.
2. The stacked capacitive transmission coupler of claim 1, wherein the coupler transmitting end further comprises: the first insulating cavity is used for wrapping the first polar plate, the second polar plate and the filling dielectric medium between the first polar plate and the second polar plate; the coupler receiving end further comprises: and the second insulating cavity is used for wrapping the fourth polar plate, the third polar plate and the filling dielectric medium between the fourth polar plate and the third polar plate.
3. The stacked capacitive transmission coupler of claim 2, wherein the first insulating cavity and the second insulating cavity are each a hollow cuboid structure formed by splicing six insulating plates with the same thickness.
4. The laminated capacitive transmission coupler according to claim 2, wherein the first and second electrode plates are respectively abutted against inner walls of opposite sides of the first insulating cavity, the third and fourth electrode plates are respectively abutted against inner walls of opposite sides of the second insulating cavity, and the filling dielectric fills the inner spaces of the first and second insulating cavities.
5. The stacked capacitive transmission coupler of claim 1, wherein the fourth plate and the second plate, which are adjacent to each other between the coupler transmitting end and the coupler receiving end, are identical in shape and area and are disposed opposite to each other, and the first plate and the third plate, which are distant from each other, are identical in shape and area and are disposed opposite to each other.
6. The stacked capacitive transmission coupler of claim 1, wherein the first plate and the second plate are equal in area and the fourth plate and the third plate are equal in area.
7. The stacked capacitive transmission coupler of claim 1, wherein an area of the first plate is greater than an area of the second plate and an area of the fourth plate is greater than an area of the third plate.
8. The laminated capacitive transmission coupler of claim 1, wherein the filler dielectric is epoxy and the transmission medium is water.
9. A stacked capacitive transmission system, comprising:
a stacked capacitive transfer coupler as claimed in any one of claims 1 to 8;
transmitting-side circuitry comprising: a power supply, an inverter and a compensation network; the output end of the power supply is connected with the input end of the inverter, and the output end of the inverter is connected with the polar plate of the transmitting end of the coupler through the compensation network;
a receiver circuit comprising: a compensation network and a rectifier; and the polar plate at the receiving end of the coupler is connected with the rectifier through the compensation network.
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