CN113162248A - Device capable of realizing simultaneous wireless charging of all-dimensional multiple mobile phones - Google Patents
Device capable of realizing simultaneous wireless charging of all-dimensional multiple mobile phones Download PDFInfo
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- CN113162248A CN113162248A CN202110386518.3A CN202110386518A CN113162248A CN 113162248 A CN113162248 A CN 113162248A CN 202110386518 A CN202110386518 A CN 202110386518A CN 113162248 A CN113162248 A CN 113162248A
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 17
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 abstract description 34
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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
- H02J50/10—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
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
-
- 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
- H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
-
- 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
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention belongs to the field of wireless power transmission, and provides equipment capable of realizing simultaneous wireless charging of a plurality of omnibearing mobile phones. The equipment capable of realizing simultaneous wireless charging of a plurality of omnibearing mobile phones has low cost, the used three-dimensional transmitting coil is wound by the copper wire, and the structure is simple and easy to manufacture; the resonant circuit element is a common capacitance inductor in the market, and the manufacturing cost is low. The complexity is low, and the structure of the three-dimensional transmitting coil is simple; the power supply is a single frequency, is not a complex phase and current control power supply, can work in a more complex environment, and has strong adaptability. The whole all-round wireless power transmission system is simple to operate and low in cost, compared with a single-equipment one-way wireless charger in the existing market, the all-round multi-load wireless power transmission system can achieve all-round multi-load wireless power transmission, so that wireless charging can be simultaneously carried out on a plurality of mobile phones, and the all-round wireless power transmission system has wide application prospects in other fields needing wireless charging.
Description
Technical Field
The invention provides a charger design scheme capable of realizing wireless charging of a plurality of mobile phones simultaneously, belongs to the field of wireless power transmission, and relates to a three-dimensional novel structure coil which realizes omnibearing multi-load wireless power transmission. And based on LCC formula resonant circuit to reach high efficiency wireless power transmission.
Background
According to the mechanism of wireless power transmission, the method mainly comprises three implementation methods of electromagnetic radiation, electric field coupling and magnetic coupling resonance. The electromagnetic radiation has high working frequency and low transmission efficiency; the electric field coupling transmission distance is short, and high-power transmission is difficult to realize; therefore, magnetic inductive coupling is becoming the mainstream research direction in academia and industry. In Magnetic coupling resonance wireless Power Transmission (Magnetic-coupling-resonance wireless-Power-Transmission), in order to increase Transmission distance, improve Transmission efficiency, realize energy conservation, environmental protection and receiving end miniaturization, a resonance network is adopted to offset the reactance of coil inductance, reduce the loss of Power in a circuit and a coil as much as possible and achieve the maximum Transmission efficiency.
The wireless charger of cell-phone on the existing market mainly regards two-dimentional one-way coil as transmitting coil, can only realize charging to single cell-phone on the short distance. However, the currently studied omnidirectional three-dimensional orthogonal wireless power transmission device usually needs a plurality of excitation power supplies to perform complex phase and current control, which leads to an increase in cost and high requirements for working environment, and is difficult to meet the increasing production requirements.
Therefore, the invention, aiming at the problems, meets the requirements of the omnidirectional wireless power transmission system with low cost and low complexity, and provides a single-power-supply omnidirectional wireless power transmission system from the viewpoint of coil design. Experiments show that the transmission power and the transmission efficiency of the transmitting coil at any angle can meet the requirements of a wireless power transmission system.
Disclosure of Invention
Aiming at the purposes of the coil with high cost and high environmental requirement and the omnidirectional wireless power transmission system with low cost and low complexity, the invention designs the single-power-supply omnidirectional wireless power transmission system from the angle of coil design, and can wirelessly charge a plurality of mobile phones at the same time.
The technical scheme of the invention is as follows:
an apparatus capable of realizing simultaneous wireless charging of a plurality of omnibearing mobile phones comprises a transmitting and receiving system and an LCC resonance system;
the transmitting and receiving system comprises a transmitting coil 1 and a receiving coil 2; the transmitting coil 1 is a three-dimensional coil wound by a copper coil with an insulating layer, the shape of the transmitting coil is a cube or a cuboid, and one surface of the transmitting coil is formed by four squares;
the LCC resonance system mainly comprises a transmitting coil 1, a receiving coil 2, a capacitor and an inductor; resonant network structure of the transmitting coil 1: the transmitting coil 1 is firstly connected with the first capacitor 3 in series, the series circuit is connected with the third capacitor 5 in parallel, and the parallel circuit is connected with the first inductor 7 in series and then connected with the power supply 9; the resonance network structure of the receiving coil 2 is consistent with that of the transmitting coil 1; the receiving coil 2 is connected with the second capacitor 4 in series, the series circuit is connected with the fourth capacitor 6 in parallel, and the parallel circuit is connected with the second inductor 8 in series and then connected to the load 10; an LCC resonant circuit is adopted, electric energy directly transmitted by the transmitting coil 1 and the receiving coil 2 passes through the LCC resonant circuit in a current mode, the LCC resonant circuit ensures that current with proper frequency flows into a load, and the whole charger reaches the lowest energy loss value;
the power supply 9 is a single frequency voltage source, and the set frequency needs to be matched with the transmitting coil 1; the load 10 is an electric energy utilizing device.
The transmitting coil 1 is a three-dimensional coil wound by a copper coil with an insulating layer, the shape of the transmitting coil is a cube or a cuboid, and one surface of the transmitting coil is formed by four squares; taking a coil with the size of 10cm × 10cm × 10cm as an example, four side surfaces are four squares with the side length of 10cm, the bottom surface is divided into four small squares with the side length of 5cm, and four sides of the top surface are square sides of the side surfaces. Any side can be selected as a winding starting point, and the winding of the coil can be completed by one lead.
And (5) the position of the gap is required in winding. For the four small square direct air gaps on the bottom surface, the transmission distance is not seriously influenced, and the air gaps between the squares on the bottom surface are reduced as much as possible when the copper coil with the insulating layer is wound. For the placement of four square contact edges on the side, a staggered arrangement is required to mitigate the magnetic field decay on the diagonal (see top view of fig. 4). The advantage of the staggered arrangement structure is also verified in simulation and experiments, and the requirement of all-directional charging can be met.
The invention has the beneficial effects that: the cost is low, the three-dimensional transmitting coil is wound by copper wires, and the structure is simple and easy to manufacture; the resonant circuit element is a common capacitance inductor in the market, and the manufacturing cost is low. The complexity is low, and the structure of the three-dimensional transmitting coil is simple; the power supply is a single frequency, is not a complex phase and current control power supply, can work in a more complex environment, and has strong adaptability. The whole all-round wireless power transmission system is simple to operate and low in cost, compared with a single-equipment one-way wireless charger in the existing market, the all-round multi-load wireless power transmission system can achieve all-round multi-load wireless power transmission, so that wireless charging can be simultaneously carried out on a plurality of mobile phones, and the all-round wireless power transmission system has wide application prospects in other fields needing wireless charging.
Drawings
FIG. 1(a) is a schematic diagram of a transmit coil, and FIG. 1(b) is a schematic diagram of a receive coil;
FIG. 2 is a schematic diagram of an LCC resonant network;
fig. 3 is an overall device.
Fig. 4 is a schematic structural diagram of the transmitting coil, in which (a) is a front view, (b) is a left view, (c) is a top view, and (d) is a perspective view.
In the figure: 1 a transmitting coil; 2 a receiving coil; 3 a first capacitor; 4 a second capacitor; 5 a third capacitor; 6 a fourth capacitor; 7 a first inductance; 8 a second inductor; 9, a power supply; 10 load; 11 a transmitting coil resonant network; 12 receive coil resonant network.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. The scope of the present invention is not limited to the description of the embodiment. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of protection of the present invention.
Fig. 2 shows a circuit diagram of the present invention, which includes a transmitting coil 1, a receiving coil 2, a capacitor, an inductor, and a resonant network formed by calculation in the transmitting and receiving system. The power source 9 is a single frequency voltage source, and the power is matched with the transmitting coil 1. The load 10 is an electric energy utilization device.
A using method of an omnibearing wireless electric energy transmission system comprises the following steps: the circuit shown in fig. 2 is connected, and the receiving coil is rotated, so that the omnibearing wireless power transmission can be realized within a certain distance.
The invention further explains the LCC resonance system at the same time, and the specific processing steps are as follows:
U1is a voltage source, Lf1And Lf2Compensating the inductance, C, for the transmitting and receiving ends in seriesf1And Cf2Compensating capacitors in parallel for transmission and reception, C1And C2Compensating capacitors, L, in series for transmitting and receiving ends1And L2For self-inductance of the transmitter coil and the receiver coil, I1For the voltage source input current, I2For outputting current to the load, U2Outputting voltage to a load
Carrying out T equivalence on a transmitting coil and a receiving coil of the LCC resonant network, and obtaining an external characteristic parameter in a two-port T parameter form, wherein Z represents the reactance of an element, and Z represents the reactance of the elementL′1And ZL′2Represents the equivalent reactance of the transmitting and receiving coils after T equivalent:
T1～T3the overall parameter T after the cascade is T ═ T1T2T3The voltage-current relationship of the input and the output of the T-shaped two-port is as follows:
wherein A, B, C and D are parameters.
Thus obtaining LCC resonant network input admittance YinOutput current I2And an input voltage U1Gain of
And the transmission efficiency η of the WPT system is respectively as follows:
admittance of input YinTransfer function model G of LCC resonant network obtained through Laplace transformYin(s)， bmAnd anIs a calculation parameter of inductance and capacitance in the resonant circuit, which is essentially an 8-step system.
Will input impedance ZinThe imaginary part is set to be 0, and the resonance condition met by the obtained circuit is as follows:
wherein ω is0Is the circuit resonant frequency.
The input and output currents of the resonant network are obtained according to kirchhoff voltage and current law
The maximum transmission power is:
it can be seen that the LCC resonant network can achieve constant current output independent of the load, and the input current and the output voltage are kept in phase.
The passband of the LCC resonant system is further explained, and the specific processing steps are as follows:
for the case of an LCC resonant circuit,
to simplify the formula, γ is defined as the ratio of inductances,
ωnin order to normalize the angular frequency of the signal,
wherein ω is0At a resonance frequency
ZinThe input impedance of the LCC resonant network viewed from the input voltage source is expressed as:
solving to obtain the input current of the voltage source
When the capacitance and inductance parameters satisfy the resonance condition
When the voltage source inputs a current of
According to the passband are defined as
Solve to obtain omeganValue omega1And omega2；
Passband value of Bω＝ω0(ω1-ω2)
The LCC resonant network and the conventional SS resonant network have narrower passband and better stability and can better meet the complex working environment through calculation.
Claims (1)
1. The equipment capable of realizing simultaneous wireless charging of the omnibearing multiple mobile phones is characterized by comprising a transmitting and receiving system and an LCC (lower control center) resonant system;
the transmitting and receiving system comprises a transmitting coil (1) and a receiving coil (2); the transmitting coil (1) is a three-dimensional coil wound by a copper coil with an insulating layer, the shape of the transmitting coil is a cube or a cuboid, and one surface of the transmitting coil is formed by four squares;
the LCC resonance system mainly comprises a transmitting coil (1), a receiving coil (2), a capacitor and an inductor; resonant network structure of the transmitting coil (1): the transmitting coil (1) is firstly connected with the first capacitor (3) in series, the series circuit is connected with the third capacitor (5) in parallel, and the parallel circuit is connected with the first inductor (7) in series and then connected with the power supply (9); the resonance network structure of the receiving coil (2) is consistent with that of the transmitting coil (1); the receiving coil (2) is connected with the second capacitor (4) in series, the series circuit is connected with the fourth capacitor (6) in parallel, and the parallel circuit is connected with the second inductor (8) in series and then connected into the load (10); an LCC resonant circuit is adopted, electric energy directly transmitted by a transmitting coil (1) and a receiving coil (2) passes through the LCC resonant circuit in a current mode, the LCC resonant circuit ensures that current with proper frequency flows into a load, and the whole charger reaches the lowest energy loss value;
the power supply (9) is a single-frequency voltage source, and the set frequency needs to be matched with the transmitting coil (1); the load (10) is an electric energy utilization device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110386518.3A CN113162248B (en) | 2021-03-31 | 2021-03-31 | Equipment capable of realizing simultaneous wireless charging of multiple mobile phones in all directions |
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| CN202110386518.3A CN113162248B (en) | 2021-03-31 | 2021-03-31 | Equipment capable of realizing simultaneous wireless charging of multiple mobile phones in all directions |
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| CN113162248A true CN113162248A (en) | 2021-07-23 |
| CN113162248B CN113162248B (en) | 2024-08-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114204695A (en) * | 2021-12-07 | 2022-03-18 | 大连理工大学 | Omnibearing multi-load wireless electric energy transmission device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150015197A1 (en) * | 2013-07-11 | 2015-01-15 | The Regents Of The University Of Michigan | Double-sided lcc compensation method for wireless power transfer |
| CN107425610A (en) * | 2017-05-10 | 2017-12-01 | 北京交通大学长三角研究院 | Radio energy transmission system and control method based on energy resource system load compensation in parallel |
| CN108471173A (en) * | 2018-04-23 | 2018-08-31 | 哈尔滨工业大学 | Have both the wireless energy transfer system of constant pressure and constant current output |
| CN111641273A (en) * | 2020-06-09 | 2020-09-08 | 西安交通大学 | Wireless power transmission system with redundant receiving coil |
| CN111917164A (en) * | 2020-07-09 | 2020-11-10 | 中国电力科学研究院有限公司 | Wireless charging system applied to transformer substation inspection robot |
| WO2021008203A1 (en) * | 2019-07-12 | 2021-01-21 | 江南大学 | Optimization method for impedance matching network of wireless power transfer system under maximum efficiency tracking |
-
2021
- 2021-03-31 CN CN202110386518.3A patent/CN113162248B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150015197A1 (en) * | 2013-07-11 | 2015-01-15 | The Regents Of The University Of Michigan | Double-sided lcc compensation method for wireless power transfer |
| CN107425610A (en) * | 2017-05-10 | 2017-12-01 | 北京交通大学长三角研究院 | Radio energy transmission system and control method based on energy resource system load compensation in parallel |
| CN108471173A (en) * | 2018-04-23 | 2018-08-31 | 哈尔滨工业大学 | Have both the wireless energy transfer system of constant pressure and constant current output |
| WO2021008203A1 (en) * | 2019-07-12 | 2021-01-21 | 江南大学 | Optimization method for impedance matching network of wireless power transfer system under maximum efficiency tracking |
| CN111641273A (en) * | 2020-06-09 | 2020-09-08 | 西安交通大学 | Wireless power transmission system with redundant receiving coil |
| CN111917164A (en) * | 2020-07-09 | 2020-11-10 | 中国电力科学研究院有限公司 | Wireless charging system applied to transformer substation inspection robot |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114204695A (en) * | 2021-12-07 | 2022-03-18 | 大连理工大学 | Omnibearing multi-load wireless electric energy transmission device |
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