CN113436864A - Halbach type coupler with shielding function - Google Patents
Halbach type coupler with shielding function Download PDFInfo
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- CN113436864A CN113436864A CN202110677397.8A CN202110677397A CN113436864A CN 113436864 A CN113436864 A CN 113436864A CN 202110677397 A CN202110677397 A CN 202110677397A CN 113436864 A CN113436864 A CN 113436864A
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- coil
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- receiving end
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- 238000003491 array Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 15
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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Classifications
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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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
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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
-
- 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
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
The invention relates to a Halbach coupler with a shielding function. The coupler is composed of a transmitting end and a receiving end, wherein the transmitting end and the receiving end are respectively composed of two main coils and three auxiliary coils. The five coils of the transmitting end and the receiving end are respectively arranged according to different Halbach array sequences. When the wireless power transmission system works, the coupling magnetic field in the coupler is enhanced due to the superposition effect of the magnetic fields generated by the main coil and the auxiliary coil, and the magnetic fields on two sides outside the coupler are weakened, so that the coupling degree of the transmitting end and the receiving end is increased, and the purpose of magnetic shielding is achieved.
Description
Technical Field
The invention belongs to the technical field of wireless power transmission
Background
The wireless power transmission technology is an ideal electric energy transmission mode, and can realize the transmission of energy from a power supply side to a device side under a non-contact condition. Because it has advantages such as safe, reliable, flexibility, consequently it is widely used in various electric energy transmission processes, like cell-phone charges, electric automobile charges, unmanned aerial vehicle charges etc..
The wireless power transmission system is easy to generate magnetic flux leakage in the working process, and further the energy transmission efficiency is reduced. Meanwhile, the magnetic flux of the wireless power transmission system has a large influence range, and when the magnetic flux passes through other metal devices, eddy current loss is generated, so that the energy transmission efficiency is reduced. Most students add magnetic conductive materials such as ferrite to the coupling mechanism to realize magnetic shielding of the wireless energy transmission system, which inevitably increases the manufacturing cost of the wireless energy transmission system and the weight of the coupling mechanism.
In summary, it is important to provide a coupler with a magnetic shielding function.
Disclosure of Invention
The technical scheme adopted by the invention is as follows:
a Halbach coupler with shielding, comprising:
a transmitting end: the device comprises two main coils and three auxiliary coils;
receiving end: the device comprises two main coils and three auxiliary coils;
the five coils of the transmitting end and the receiving end are arranged according to the sequence of the Halbach array.
In the above Halbach coupler with shielding function, the transmitting end includes a coil a, a coil B, a coil C, a coil D and a coil E; the coil B and the coil D are main coils, the coil A, the coil C and the coil E are auxiliary coils, and the five coils are arranged according to the sequence of the Halbach array and are connected end to form a transmitting end.
In the above mentioned Halbach coupler with shielding function, the receiving end includes coil a1, coil B1, coil C1, coil D1 and coil E1; the coil B1 and the coil D1 are main coils, the coil A1, the coil C1 and the coil E1 are auxiliary coils, and the five coils are arranged in the reverse Halbach array sequence and are connected end to form a receiving end.
In the above-mentioned Halbach coupler with shielding function, for the Halbach arrays at the transmitting end and the receiving end, at a certain moment, according to the right-hand screw rule, it is ensured that the direction of the magnetic field generated inside the coil is right, up, left, down, right, or reverse.
In the above-mentioned Halbach coupler with shielding function, for the reverse Halbach arrays at the transmitting end and the receiving end, at a certain moment, according to the right-hand screw rule, it is ensured that the direction of the magnetic field generated inside the coil is left, up, right, down, left, or reverse.
Drawings
Fig. 1 is an overall configuration diagram of a Halbach type coupler having a magnetic shield function.
Fig. 2 shows the structure of the emitter and its internal current flow.
Fig. 3 shows the receiver structure and its internal current flow.
Fig. 4 shows the direction of the magnetic field inside the transmitting end.
Fig. 5 shows the internal field direction at the receiving end.
Fig. 6 shows the internal magnetic field direction and the magnetic field weakening portion when the coupler is in operation.
Fig. 7 is a diagram of transmit coil size parameters.
Detailed Description
As shown in fig. 1-5, the coupler has a transmitting end 5 and a receiving end 6, wherein the transmitting end 5 and the receiving end 6 are respectively composed of two main coils 1, 3 and three auxiliary coils 2, 4. The five coils of the transmitting end and the receiving end are respectively arranged according to different Halbach array sequences.
The transmitting terminal is characterized in that: the transmitting end consists of five coils, namely a coil A7, a coil B8, a coil C9, a coil D10 and a coil E11; the coil B8 and the coil D10 are main coils, the coil A7, the coil C9 and the coil E11 are auxiliary coils, and the five coils are arranged according to the sequence of a Halbach array, and are connected end to form a transmitting end. The arrow direction in fig. 2 is the transmitting-end current direction.
The receiving end is characterized in that: the receiving end consists of five coils, namely a coil A112, a coil B113, a coil C114, a coil D115 and a coil E116; the coil B113 and the coil D115 are main coils, the coil A112, the coil C114 and the coil E116 are auxiliary coils, and the five coils are arranged according to the sequence of a reverse Halbach array and are connected end to form a receiving end. The direction of the arrow in fig. 3 is the receiving end current direction.
The Halbach array is characterized in that: at a certain moment, according to the right-hand screw rule, the direction of the magnetic field generated inside the coil is ensured to be right, upper, left, lower, right or reverse.
The reverse Halbach array is characterized in that: at a certain moment, according to the right-hand screw rule, the direction of the magnetic field generated inside the coil is ensured to be left, up, right, down, left or reverse.
Fig. 6 shows the direction of the internal magnetic field and the magnetic field weakening portion when the coupler is operated, and the dotted lines with arrows in fig. 6 show the direction of the magnetic field generated by each coil at a certain fixed time after the coupler is supplied with a high-frequency alternating current. Q1, Q2, Q3, Q4, Q5 and Q6 represent the areas where the magnetic fields cancel each other out, and the purpose of magnetic shielding is achieved.
The implementation scheme adopts a litz wire wound coupler with a copper core with a sectional area of 0.75 square millimeter, and the adjacent distance between the centers of the cross sections of the leads is 2 mm. FIG. 7 shows a schematic diagram of the transmitting end, where LA、LC、LERepresents the number of turns of coil a, coil C and coil E; wA、WCAnd WERepresents the width of coil a, coil C and coil E; hA、HCAnd HERepresents the height of coil a, coil C and coil E; l isBAnd LDRepresents the length of coil B and coil D; wBAnd WDRepresents the width of coil B and coil D; hBAnd HDRepresenting the number of turns of coil B and coil D.
For the transmitting end, the embodiment takes: l isA＝LE＝5,WA＝WE＝81.5mm，HA＝HE＝19.5mm，LC＝8，WC＝81.5mm，HC＝19.5mm，LB＝LD＝51.5mm，WB＝WD＝81.5mm，HB＝HD10. For the receiving end, the corresponding size is the same as the transmitting end.
The self-inductances of the transmitting end and the receiving end in this embodiment are 29.95 muH and 29.92 muH, respectively. The mutual inductance between the transmitter and receiver ends is about 8.2 muH when the distance from the top of the transmitter to the bottom of the receiver is 11 mm.
In the wireless power transmission system adopting the S-S compensation structure, the compensation capacitor of the transmitting end is 130.2nf, the compensation capacitor of the receiving end is 132.3nf, square wave current with the frequency of 100kHz and the voltage of plus and minus 22V is introduced into the coupler and the compensation mechanism, the power of the wireless power transmission system is 69.5W, and the transmission efficiency is 80.2%.
The above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, but not intended to limit the scope of the present invention, and all equivalent technical solutions also belong to the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (5)
1. A Halbach coupler with shielding, comprising:
a transmitting end: the device comprises two main coils and three auxiliary coils;
receiving end: the device comprises two main coils and three auxiliary coils;
the five coils of the transmitting end and the receiving end are arranged according to the sequence of the Halbach array.
2. The Halbach coupler with shielding function according to claim 1, wherein the transmitting end comprises a coil A, a coil B, a coil C, a coil D and a coil E; the coil B and the coil D are main coils, the coil A, the coil C and the coil E are auxiliary coils, and the five coils are arranged according to the sequence of the Halbach array and are connected end to form a transmitting end.
3. The Halbach coupler of claim 1, wherein the receiving end includes coil A1, coil B1, coil C1, coil D1 and coil E1; the coil B1 and the coil D1 are main coils, the coil A1, the coil C1 and the coil E1 are auxiliary coils, and the five coils are arranged in the reverse Halbach array sequence and are connected end to form a receiving end.
4. The Halbach coupler of claim 2, wherein the orientation of the magnetic field generated inside the coil is guaranteed to be right, up, left, down, right, or reverse, according to the right-hand screw rule, at a certain instant, for the Halbach arrays of the transmitting end and the receiving end.
5. The Halbach coupler with shielding function according to claim 2, wherein for the reverse Halbach arrays of the transmitting end and the receiving end, at a certain moment, according to the right-hand screw rule, the direction of the magnetic field generated inside the coil is ensured to be left, up, right, down, left, or reverse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110677397.8A CN113436864A (en) | 2021-06-18 | 2021-06-18 | Halbach type coupler with shielding function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110677397.8A CN113436864A (en) | 2021-06-18 | 2021-06-18 | Halbach type coupler with shielding function |
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| Publication Number | Publication Date |
|---|---|
| CN113436864A true CN113436864A (en) | 2021-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110677397.8A Pending CN113436864A (en) | 2021-06-18 | 2021-06-18 | Halbach type coupler with shielding function |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080265894A1 (en) * | 2007-04-27 | 2008-10-30 | Snyder Harold L | Externally Guided and Directed Halbach Array Field Induction Resistivity Tool |
| US20110137589A1 (en) * | 2009-12-02 | 2011-06-09 | Nanalysis Corp. | Method and apparatus for producing homogeneous magnetic fields |
| US20140135615A1 (en) * | 2012-11-12 | 2014-05-15 | Marcel Kruip | Combined mri and radiation therapy system |
-
2021
- 2021-06-18 CN CN202110677397.8A patent/CN113436864A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080265894A1 (en) * | 2007-04-27 | 2008-10-30 | Snyder Harold L | Externally Guided and Directed Halbach Array Field Induction Resistivity Tool |
| US20110137589A1 (en) * | 2009-12-02 | 2011-06-09 | Nanalysis Corp. | Method and apparatus for producing homogeneous magnetic fields |
| US20140135615A1 (en) * | 2012-11-12 | 2014-05-15 | Marcel Kruip | Combined mri and radiation therapy system |
Non-Patent Citations (1)
| Title |
|---|
| LONGYANG WANG等: "Halbach-Type Coupler WPT System With Flux-Shielding Function for Linear Motor", 《《IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION》》 * |
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Application publication date: 20210924 |