CN113708514A - Wireless power transmission device - Google Patents
Wireless power transmission device Download PDFInfo
- Publication number
- CN113708514A CN113708514A CN202010428101.4A CN202010428101A CN113708514A CN 113708514 A CN113708514 A CN 113708514A CN 202010428101 A CN202010428101 A CN 202010428101A CN 113708514 A CN113708514 A CN 113708514A
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- Prior art keywords
- coil
- transmitting
- receiving
- coils
- wireless power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
- 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
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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
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
- H02J50/402—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
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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
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a wireless electric energy transmission device, which comprises a transmitting coil, a receiving coil, an inverter and a rectifier, wherein the transmitting coil and the inverter are arranged on fixed equipment, and the receiving coil and the rectifier are arranged on moving equipment; the inverter is connected with the transmitting coil and used for supplying high-frequency current to the transmitting coil; the receiving coil is used for inducing high-frequency voltage according to the high-frequency current on the transmitting coil, and the rectifier is connected with the receiving coil and used for processing the high-frequency voltage induced by the receiving coil to obtain direct-current voltage to supply power for the sports equipment; the transmitting coil and the receiving coil are both 8-shaped coils, each 8-shaped coil comprises an upper loop coil and a lower loop coil, and the upper loop coil is communicated with the lower loop coil and opposite in winding direction. The invention can solve the problem of electromagnetic leakage of the existing wireless power transmission coil.
Description
Technical Field
The invention relates to the technical field of wireless power transmission, in particular to a wireless power transmission device.
Background
The traditional mobile wireless power transmission coil is of a multi-single-coil structure, has the characteristics of simple structure and low cost, but the system has large electromagnetic leakage.
Disclosure of Invention
The invention provides a wireless power transmission device which can solve the problem of electromagnetic leakage of an existing wireless power transmission coil.
The invention provides a wireless power transmission device, which comprises a transmitting coil, a receiving coil, an inverter and a rectifier, wherein the transmitting coil and the inverter are arranged on fixed equipment, and the receiving coil and the rectifier are arranged on moving equipment; the inverter is connected with the transmitting coil and is used for providing high-frequency current for the transmitting coil; the receiving coil is used for inducing high-frequency voltage according to the high-frequency current on the transmitting coil, and the rectifier is connected with the receiving coil and used for processing the high-frequency voltage induced by the receiving coil to obtain direct-current voltage to supply power to the sports equipment; the transmitting coil and the receiving coil are both 8-shaped coils, each 8-shaped coil comprises an upper loop coil and a lower loop coil, and the upper loop coil and the lower loop coil are communicated and are opposite in winding direction.
Preferably, the upper loop coil and the lower loop coil are of an up-down symmetrical structure.
Preferably, the transmitting coil and the receiving coil are both in a right-angle rectangle, a rounded rectangle or a polygon.
Preferably, the width of the transmitting coil is the same as the width of the receiving coil.
Preferably, the center lines of the upper and lower loop coils of the transmitting coil and the center lines of the upper and lower loop coils of the receiving coil are aligned.
Preferably, a magnetic core is arranged in the transmitting coil and/or the receiving coil.
Preferably, the number of the transmitting coils and/or the receiving coils is multiple, and the transmitting coils and/or the receiving coils are arranged along the moving direction of the moving equipment.
Preferably, the plurality of transmitting coils are connected in series with each other and then connected to the inverter.
Preferably, the plurality of receiving coils are connected in series with each other and then connected to the rectifier.
Preferably, each of the receiving coils is connected to one of the rectifiers.
By applying the technical scheme of the invention, the transmitting coil and the receiving coil are both 8-shaped coils, and the upper loop coil and the lower loop coil of the 8-shaped coils are communicated with each other and have opposite winding directions, so that the current directions of the upper loop coil and the lower loop coil are opposite, the total magnetic field of external current is reduced, and the magnetic field leakage is obviously weakened.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 illustrates a schematic configuration of a wireless power transmission apparatus according to an embodiment of the present invention;
FIG. 2 shows a schematic structural diagram of a single transmit coil and a single receive coil in accordance with an embodiment of the invention;
fig. 3 shows a schematic structural diagram of a figure-8 coil according to an embodiment of the invention;
FIG. 4 shows a schematic structural diagram of a plurality of transmit coils and a plurality of receive coils according to an embodiment of the invention;
fig. 5 is a diagram illustrating a connection of a wireless power transmission apparatus including a plurality of transmitting coils and a plurality of receiving coils according to an embodiment of the present invention;
fig. 6 is a diagram illustrating another connection of a wireless power transmission apparatus including a plurality of transmitting coils and a plurality of receiving coils according to an embodiment of the present invention.
Description of the reference numerals
10. A transmitting coil; 20. A receiving coil; 30. An inverter;
40. a rectifier; 50. An upper loop coil; 60. A lower loop coil.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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 protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As shown in fig. 1 and 2, the present invention provides a wireless power transmission apparatus, which includes a transmitting coil 10, a receiving coil 20, an inverter 30 and a rectifier 40, wherein the transmitting coil 10 and the inverter 30 are disposed on a fixed device, and the receiving coil 20 and the rectifier 40 are disposed on a moving device; the inverter 30 is connected with the transmitting coil 10 and is used for providing high-frequency current for the transmitting coil 10; the receiving coil 20 is configured to induce a high-frequency voltage according to the high-frequency current on the transmitting coil 10, and the rectifier 40 is connected to the receiving coil 20 and configured to process the high-frequency voltage induced by the receiving coil 20 to obtain a direct-current voltage to supply power to the sports equipment; the transmitting coil 10 and the receiving coil 20 are both figure-8 coils, the figure-8 coils include an upper loop coil 50 and a lower loop coil 60, and the upper loop coil 50 is communicated with the lower loop coil 60, and the winding directions are opposite.
The transmitting coil 10 and the receiving coil 20 of the present invention are both 8-shaped coils, and the upper loop coil 50 and the lower loop coil 60 of the 8-shaped coils are communicated with each other and have opposite winding directions, so that the current directions of the upper loop coil 50 and the lower loop coil 60 are opposite, the total magnetic field of external current is reduced, and the magnetic field leakage is significantly reduced.
According to an embodiment of the present invention, the upper loop coil 50 and the lower loop coil 60 have an up-down symmetrical structure. In this case, the effect of reducing the magnetic field leakage is most remarkable. The present embodiment is only one preferred embodiment of the present invention, and is not intended to limit the present invention, and the figure-8 coil of the present invention may also be configured in an up-down asymmetric structure.
Fig. 3 shows a schematic structural diagram of a figure-8 coil according to an embodiment of the invention. As shown in fig. 3, the number of turns of the 8-shaped coil is 2, and the specific winding sequence is as follows: the coil is wound for one circle in the upper loop coil 50 from the input end, then the coil is wound for two circles in the lower loop coil 60, and then the coil is wound for one circle in the upper loop coil 50 and then output. Fig. 3 is only an embodiment of the present invention, and is not intended to limit the present invention, and the figure-8 coil of the present invention may be set to any number of turns, and any reasonable winding manner may be adopted.
According to an embodiment of the present invention, the structures of the transmitting coil 10 and the receiving coil 20 may be rectangular, rectangular with rounded corners, or polygonal.
According to an embodiment of the present invention, the width of the transmitting coil 10 is the same as the width of the receiving coil 20, and the center lines of the upper and lower loop coils 60 of the transmitting coil 10 and the center lines of the upper and lower loop coils 60 of the receiving coil 20 are aligned, so as to maximize the electromagnetic coupling area of the transmitting coil 10 and the receiving coil 20, so as to enhance the electromagnetic coupling capability and improve the transmission efficiency. The present embodiment is only one preferred embodiment of the present invention, and is not intended to limit the present invention, and the present invention may be implemented even when the width of the transmitting coil 10 is different from the width of the receiving coil 20, or the center lines of the upper and lower loop coils 60 of the transmitting coil 10 and the center lines of the upper and lower loop coils 60 of the receiving coil 20 are not aligned.
Wherein the width direction of the transmitting coil 10 and the receiving coil 20 is a direction perpendicular to the center line. The receiving coil 20 moves linearly along the central line direction, and can receive the electric energy of the transmitting coil 10 in a static state or a moving state.
According to an embodiment of the present invention, a magnetic core is disposed in the transmitting coil 10 and/or the receiving coil 20 to enhance the electromagnetic coupling capability of the coil and improve the transmission efficiency. That is, the magnetic core may be provided in the transmitting coil 10 alone, the magnetic core may be provided in the receiving coil 20 alone, or the magnetic cores may be provided in both the transmitting coil 10 and the receiving coil 20.
Fig. 4 shows a schematic structural diagram of a plurality of sets of transmit and receive coils 20 according to an embodiment of the invention. As shown in fig. 4, the number of the transmitting coils 10 and/or the receiving coils 20 is plural, and each is arranged along the moving direction of the moving device. That is, one transmitting coil 10 may correspond to a plurality of receiving coils 20, a plurality of transmitting coils 10 may correspond to one receiving coil 20, or a plurality of transmitting coils 10 may correspond to a plurality of receiving coils 20. The number of transmitting coils 10 and receiving coils 20 of the present invention may be the same or different. The number of the transmitting coils 10 and the receiving coils 20 is set according to the power supply distance. For example, the number of the transmitting coils 10 is determined according to the power supply interval requirement of the ground, and the number of the receiving coils 20 is determined according to the vehicle-mounted requirement.
There may be a plurality of connection modes for the transmitting coil 10 and the receiving coil 20. For example, the plurality of transmitting coils 10 are connected in series to each other and then connected to the inverter 30, and the plurality of receiving coils 20 are connected in series to each other and then connected to the rectifier 40, as shown in fig. 5. In this case, as shown in fig. 6, the output ends of the rectifiers 40 may be independently output, or may be further connected in series to output a high-stability voltage.
According to an embodiment of the present invention, the inverter 30 employs a high-frequency inverter power supply, and a first capacitance compensation device is disposed in the high-frequency inverter power supply, and the first capacitance compensation device is configured to offset the inductive impedance of the transmitting coil 10.
According to an embodiment of the present invention, the wireless power transmission apparatus of the present invention further includes a second capacitance compensation device disposed between the receiving coil 20 and the rectifier 40 for canceling an inductive impedance of the receiving coil 20.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A wireless power transmission apparatus, characterized in that the apparatus comprises a transmitting coil (10), a receiving coil (20), an inverter (30) and a rectifier (40), the transmitting coil (10) and the inverter (30) are disposed on a stationary device, the receiving coil (20) and the rectifier (40) are disposed on a moving device; the inverter (30) is connected with the transmitting coil (10) and is used for providing high-frequency current for the transmitting coil (10); the receiving coil (20) is used for inducing high-frequency voltage according to the high-frequency current on the transmitting coil (10), and the rectifier (40) is connected with the receiving coil (20) and used for processing the high-frequency voltage induced by the receiving coil (20) to obtain direct-current voltage to supply power for the sports equipment; the transmitting coil (10) and the receiving coil (20) are both 8-shaped coils, each 8-shaped coil comprises an upper loop coil (50) and a lower loop coil (60), and the upper loop coil (50) is communicated with the lower loop coil (60) and is wound in opposite directions.
2. A radio energy transmission apparatus according to claim 1, wherein said upper loop coil (50) and said lower loop coil (60) are of an up-down symmetrical structure.
3. A wireless power transfer device according to claim 1, wherein the transmitter coil (10) and the receiver coil (20) are each configured as a right-angled rectangle, a rounded rectangle, or a polygon.
4. A wireless power transfer device according to claim 1, characterized in that the width of the transmitting coil (10) and the width of the receiving coil (20) are the same.
5. A radio energy transmission device according to claim 1, characterized in that the centre lines of the upper and lower loop coils of the transmitting coil (10) and the centre lines of the upper and lower loop coils of the receiving coil (20) are aligned.
6. A wireless power transfer device according to claim 1, characterized in that a magnetic core is arranged in the transmitter coil (10) and/or the receiver coil (20).
7. A wireless power transfer apparatus according to claim 1, wherein the number of the transmitting coils (10) and/or the receiving coils (20) is plural, and each is arranged along the moving direction of the moving device.
8. A wireless power transmission apparatus according to claim 6, wherein a plurality of said transmitting coils (10) are connected in series with each other and then connected to said inverter (30).
9. A wireless power transfer apparatus according to claim 6, wherein a plurality of the receiving coils (20) are connected in series with each other and then connected to the rectifier (40).
10. A wireless power transfer arrangement according to claim 6 wherein each of the receiving coils (20) is connected to one of the rectifiers (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010428101.4A CN113708514A (en) | 2020-05-20 | 2020-05-20 | Wireless power transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010428101.4A CN113708514A (en) | 2020-05-20 | 2020-05-20 | Wireless power transmission device |
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| CN113708514A true CN113708514A (en) | 2021-11-26 |
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| CN202010428101.4A Pending CN113708514A (en) | 2020-05-20 | 2020-05-20 | Wireless power transmission device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH10136587A (en) * | 1996-10-31 | 1998-05-22 | Nippon Signal Co Ltd:The | Power wave receiver |
| CN103872800A (en) * | 2014-04-08 | 2014-06-18 | 武汉大学 | Transmitting terminal applied to magnetic resonance wireless power transmission device |
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| CN106532980A (en) * | 2016-12-13 | 2017-03-22 | 西南交通大学 | Non-contact type dynamic power supply system coil for trains in rail transit |
| CN108110908A (en) * | 2018-01-23 | 2018-06-01 | 中国矿业大学(北京) | Asymmetric coils magnetic coupling resonant radio energy Transmission system and method |
| CN108649711A (en) * | 2018-06-12 | 2018-10-12 | 哈尔滨工业大学 | A kind of ambipolar coupling device for slewing wireless power transmission |
| CN109038857A (en) * | 2018-08-17 | 2018-12-18 | 天津工业大学 | A kind of dynamic radio power supply 3 D electromagnetic coupled system based on practical application operating condition |
| JP2019017168A (en) * | 2017-07-05 | 2019-01-31 | 株式会社Ihi | Foreign matter detection device |
| CN110323842A (en) * | 2019-08-06 | 2019-10-11 | 中车唐山机车车辆有限公司 | A kind of square coil optimization structure applied to the transmission of high-power wireless electric energy |
| CN110808641A (en) * | 2019-11-01 | 2020-02-18 | 南京航空航天大学 | Wireless power transmission topology with strong anti-migration performance based on multi-frequency energy parallel transmission |
| CN110896249A (en) * | 2019-11-19 | 2020-03-20 | 国网江西省电力有限公司电力科学研究院 | Asymmetric four-coil resonator and wireless power transmission system with same |
-
2020
- 2020-05-20 CN CN202010428101.4A patent/CN113708514A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH10136587A (en) * | 1996-10-31 | 1998-05-22 | Nippon Signal Co Ltd:The | Power wave receiver |
| WO2015060781A1 (en) * | 2013-10-24 | 2015-04-30 | Harald Merkel | Method and arrangement for wireless energy transfer |
| US20160243949A1 (en) * | 2013-10-24 | 2016-08-25 | Harald Merkel | Method and arrangement for wireless energy transfer |
| CN103872800A (en) * | 2014-04-08 | 2014-06-18 | 武汉大学 | Transmitting terminal applied to magnetic resonance wireless power transmission device |
| CN106300687A (en) * | 2015-06-05 | 2017-01-04 | 江苏嘉钰新能源技术有限公司 | A kind of magnetic coupling resonant power wireless charging device |
| CN106532980A (en) * | 2016-12-13 | 2017-03-22 | 西南交通大学 | Non-contact type dynamic power supply system coil for trains in rail transit |
| JP2019017168A (en) * | 2017-07-05 | 2019-01-31 | 株式会社Ihi | Foreign matter detection device |
| CN108110908A (en) * | 2018-01-23 | 2018-06-01 | 中国矿业大学(北京) | Asymmetric coils magnetic coupling resonant radio energy Transmission system and method |
| CN108649711A (en) * | 2018-06-12 | 2018-10-12 | 哈尔滨工业大学 | A kind of ambipolar coupling device for slewing wireless power transmission |
| CN109038857A (en) * | 2018-08-17 | 2018-12-18 | 天津工业大学 | A kind of dynamic radio power supply 3 D electromagnetic coupled system based on practical application operating condition |
| CN110323842A (en) * | 2019-08-06 | 2019-10-11 | 中车唐山机车车辆有限公司 | A kind of square coil optimization structure applied to the transmission of high-power wireless electric energy |
| CN110808641A (en) * | 2019-11-01 | 2020-02-18 | 南京航空航天大学 | Wireless power transmission topology with strong anti-migration performance based on multi-frequency energy parallel transmission |
| CN110896249A (en) * | 2019-11-19 | 2020-03-20 | 国网江西省电力有限公司电力科学研究院 | Asymmetric four-coil resonator and wireless power transmission system with same |
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