CN113629893B - Wireless charging coupling mechanism, wireless power transmission system and method - Google Patents
Wireless charging coupling mechanism, wireless power transmission system and method Download PDFInfo
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- CN113629893B CN113629893B CN202110856139.6A CN202110856139A CN113629893B CN 113629893 B CN113629893 B CN 113629893B CN 202110856139 A CN202110856139 A CN 202110856139A CN 113629893 B CN113629893 B CN 113629893B
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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
- 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
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
Abstract
The invention belongs to the technical field of wireless power transmission, and particularly relates to a wireless charging coupling mechanism, a wireless power transmission system and a wireless power transmission method. The wireless charging coupling mechanism comprises an energy transmitting device and an energy receiving device; the energy transmitting device comprises an energy transmitting coil; the energy receiving device comprises an energy receiving coil; the energy transmitting coil comprises a first coil group and a second coil group; the first coil group and the second coil group have the same shape; the first coil group generates a magnetic field in the X-axis direction, and the second coil group generates a magnetic field in the Y-axis direction; according to the invention, two groups of coils are used for generating horizontal magnetic fields along two dimensions of the X-axis direction and the Y-axis direction, and the energy transmitting coil can realize wireless power transmission no matter the energy receiving coil is placed along the X-axis direction or the Y-axis direction, so that one degree of freedom is expanded compared with the traditional single double-D-shaped coil, and the energy receiving terminal is subjected to multi-degree-of-freedom wireless charging.
Description
Technical Field
The invention belongs to the technical field of wireless power transmission, and particularly relates to a wireless charging coupling mechanism, a wireless power transmission system and a wireless power transmission method.
Background
The intelligent inspection of the robot has the advantages of good autonomy, high inspection quality and the like, the intelligent level of inspection is greatly improved, and the inspection mode of the robot replaces the traditional manual inspection mode and has become a development trend. The current power supply mode of the inspection robot is mostly based on a wired charging or manual power change mode, and the problems of poor flexibility, low reliability, low intelligent level and the like exist. The wireless charging technology provides a thought for solving the problems of the contact type power supply or manual power change mode, and has the advantages of flexibility, reliability, safety and the like because the wireless charging technology gets rid of the constraint of physical media, and is more and more widely applied to the intelligent inspection field of robots.
At present, a receiving end of a wireless charging system of a robot is mainly horizontally arranged at the bottom of the robot body by adopting a solenoid coil, and is matched with a horizontal direction transmitting magnetic field generated by a single double-D-shaped transmitting coil, and in fig. 1, the solenoid coil and the single double-D-shaped transmitting coil are mutually coupled. However, a single double-D-shaped transmitting coil only generates a magnetic field in a horizontal direction, and a solenoid-type receiving coil needs to be parallel to the transmitting magnetic field to be well coupled with the magnetic field so as to receive energy, so that the requirement on the parking precision of a receiving end is high, and the wireless charging freedom degree is low.
Disclosure of Invention
In order to solve the problems, the invention provides a wireless charging coupling mechanism, a wireless power transmission system and a wireless power transmission method, and the specific technical scheme is as follows:
a wireless charging coupling mechanism comprises an energy transmitting device and an energy receiving device;
the energy transmitting device comprises an energy transmitting coil; the energy receiving device comprises an energy receiving coil;
the energy transmitting coil comprises a first coil group and a second coil group; the first coil group and the second coil group respectively comprise two coils which are mutually in axisymmetric patterns; the symmetry axis of the first coil group is a Y axis, and the symmetry axis of the second coil group is an X axis; the first coil group and the second coil group are the same in shape;
the first coil group generates a magnetic field in the X horizontal direction, and the second coil group generates a magnetic field in the Y horizontal direction;
when the energy receiving coil is placed along the X-axis direction, the energy receiving coil and the first coil group are mutually coupled; when the energy receiving coil is placed along the Y-axis direction, the energy receiving coil and the second coil group are mutually coupled.
Preferably, the first coil set and the second coil set respectively comprise two isosceles trapezoid coils which are axisymmetric to each other; the four isosceles trapezoid coils are positioned on the same plane, and the upper bottom edges of the four isosceles trapezoid coils are close to the origin of coordinates.
Preferably, the parameters of the four isosceles trapezoid coils are consistent.
Preferably, the energy transmitting coil comprises a transmitting end compensating coil;
the upper bottom edges of the four isosceles trapezoid coils are close to the origin and are connected end to form a square area where the coils are not wound;
the transmitting end compensation coil is arranged in the square area.
Preferably, the energy emitting device further comprises a magnetic core and a magnetic shielding device, wherein the magnetic core and the magnetic shielding device are of a planar square structure, and the magnetic core is arranged between the magnetic shielding device and the energy emitting coil.
A wireless power transfer system comprising
A primary side power transmitting circuit and a secondary side power receiving circuit;
the primary side electric energy transmitting circuit comprises a direct current power supply, a full-bridge inverter circuit, a primary side resonance compensation network and the energy transmitting coil of the wireless charging coupling mechanism which are sequentially connected;
the secondary side electric energy receiving circuit comprises an energy receiving coil, a secondary side resonance compensation network, a rectifying and filtering circuit and a load which are sequentially connected with the wireless charging coupling mechanism;
the energy receiving coil is a solenoid coil;
the primary side electric energy transmitting circuit further comprises a first switch and a second switch, the first switch and the second switch are respectively connected with the first coil group and the second coil group, and the first switch and the second switch are respectively used for controlling the opening and the closing of the first coil group and the second coil group;
when the energy receiving coil is placed along the X-axis direction, the first switch is turned on, the second switch is turned off, and the energy receiving coil and the first coil group are mutually coupled; when the energy receiving coil is placed along the Y-axis direction, the first switch is closed, the second switch is opened, and the energy receiving coil and the second coil group are mutually coupled.
Preferably, the driving signals of the first switch and the second switch are inverted.
Preferably, the first switch and the second switch comprise MOSFET transistors.
A wireless power transmission method is applied to the wireless power transmission system, and comprises the following steps:
s1: when the energy receiving coil enters a charging area, the first switch is turned on, and the second switch is turned off to obtain a first output voltage U o1 ；
S2: the first output voltage U o1 And a preset voltage threshold U set Comparing; if the first output voltage U o1 Greater than or equal to the preset voltage threshold U set Wireless energy transmission is carried out to the energy receiving coil through the first coil group;
if the first output voltage U o1 Is smaller than the preset voltage threshold U set Closing the first switch and opening the second switch to obtain a second output voltage U o2 ；
S3: the second output voltage U o2 And the preset voltage threshold U set Comparing;
if the second output voltage U o2 Greater than or equal to the preset voltage threshold U set Wireless energy transmission is carried out to the energy receiving coil through the second coil group;
if the second output voltage U o2 Is smaller than the preset voltage threshold U set And informing the secondary side electric energy receiving end to adjust the placement angle.
The beneficial effects of the invention are as follows: according to the invention, two groups of coils are used for generating horizontal magnetic fields along two dimensions of the X-axis direction and the Y-axis direction, and the energy transmitting coil can realize wireless power transmission no matter the energy receiving coil is placed along the X-axis direction or the Y-axis direction, so that one degree of freedom is expanded compared with the traditional single double-D-shaped coil, and the energy receiving terminal is subjected to multi-degree-of-freedom wireless charging.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of a prior art solenoid coil and a single dual D-type transmit coil coupled to each other;
fig. 2 is a schematic diagram of a solenoid coil according to the first and second embodiments, wherein the solenoid coil is coupled to a pair of double-D coils along the X horizontal direction when the solenoid coil is placed along the X horizontal direction;
FIG. 3 is a schematic diagram showing a solenoid coil according to the first and second embodiments, wherein the solenoid coil is coupled to a pair of double-D coils along the Y horizontal direction when the solenoid coil is placed along the Y horizontal direction;
FIG. 4 is a schematic diagram of an energy emitting device according to the first and second embodiments;
fig. 5 is a schematic diagram of a wireless power transmission system according to a second embodiment;
the coil assembly comprises a solenoid coil 11, a first coil group 12, a second coil group 13, a transmitting end compensation coil 14 and a magnetic core 15.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Embodiment one:
in order to solve the problems that in the prior art, a single double-D-shaped transmitting coil only generates a magnetic field in a horizontal direction, the requirements on parking precision of a receiving end are high, and the wireless charging freedom degree is low, the embodiment provides a wireless charging coupling mechanism which can be applied to wireless charging scenes of robots, automobiles, unmanned aerial vehicles and the like, and referring to fig. 2 to 4, the wireless charging coupling mechanism comprises an energy transmitting device and an energy receiving device;
the energy transmitting device comprises an energy transmitting coil; the energy receiving device comprises an energy receiving coil;
the energy transmitting coil comprises a first coil set 12 and a second coil set 13; the first coil group 12 and the second coil group 13 respectively include two coils having axisymmetric patterns with each other; the symmetry axis of the first coil set 12 is the Y axis, and the symmetry axis of the second coil set 13 is the X axis; the first coil group 12 and the second coil group 13 are the same shape;
the first coil set 12 generates a magnetic field in the X horizontal direction, and the second coil set 13 generates a magnetic field in the Y horizontal direction;
when the energy receiving coils are placed along the X-axis direction, the energy receiving coils are mutually coupled with the first coil group 12; the energy receiving coils are coupled to each other with the second coil set 13 when the energy receiving coils are placed in the Y-axis direction.
As shown in fig. 2, the energy receiving coil is coupled to the first coil set 12 when the energy receiving coil is placed in the X-axis direction, and as can also be seen from fig. 2, the first coil set 12 has a magnetic field and the second coil set 13 has no magnetic field when the energy receiving coil is placed in the X-axis direction.
As shown in fig. 3, the energy receiving coil is coupled to the second coil set 1313 when the energy receiving coil is placed in the Y-axis direction, and as can also be seen in fig. 3, the second coil set 13 has a magnetic field while the first coil set 12 has no magnetic field when the energy receiving coil is placed in the Y-axis direction.
The energy transmitting coils formed by the first coil group 12 and the second coil group 13 can generate horizontal magnetic fields with two dimensions of the X horizontal direction and the Y horizontal direction, and the energy transmitting coils can realize wireless power transmission no matter the energy receiving coils are arranged along the X axis direction or the Y axis direction, so that one degree of freedom is expanded compared with the traditional single double-D-shaped coil, and the energy receiving terminal is subjected to multi-degree-of-freedom wireless charging. For example, a solenoid coil 11 is horizontally arranged on the bottom of the robot body, and the robot can realize wireless charging whether the robot is placed along the X-axis direction or the Y-axis direction.
As shown in fig. 4, the first coil group 12 and the second coil group 13 each include two isosceles trapezoid coils that are axisymmetric to each other; the four isosceles trapezoid coils are positioned on the same plane, and the upper bottom edges of the four isosceles trapezoid coils are close to the origin of coordinates. The four isosceles trapezoid coils have consistent parameters, and the parameters comprise winding turns, winding wire diameters and the like.
As shown in fig. 4, the energy transmitting coil includes a transmitting-end compensating coil 14; the upper bottom edges of the four isosceles trapezoid coils are close to the origin and are connected end to form a closed square area where the coils are not wound; the transmitting-end compensation coil 14 is disposed in a square region. The transmitting-end compensating coil 14 is a Q-type coil, and the transmitting-end compensating coil 14 is arranged at the center of the energy transmitting coil, so that the volume of the energy transmitting device is reduced. The transmitting end compensating coil 14 and the energy transmitting coil are mutually decoupled, so that the problems of mutual crosstalk, electromagnetic interference and the like do not exist, and the compensation network can be ensured to have a constant voltage output function.
As shown in fig. 4, the energy emitting device further includes a magnetic core 15 and a magnetic shielding device, both of which are of a planar square structure, the magnetic core 15 being disposed between the magnetic shielding device and the energy emitting coil. The magnetic core 15 and the magnetic shielding device are shared by the transmitting end compensating coil 14 and the energy transmitting coil, so that the volume and the weight of the energy transmitting device are reduced, and the cost is saved. The magnetic shield device includes an aluminum plate or a copper plate.
Embodiment two:
in order to solve the problems that in the prior art, a single double-D type transmitting coil only generates a magnetic field in a horizontal direction, the requirements on parking precision of a receiving end are high, and the wireless charging freedom degree is low, the embodiment provides a wireless electric energy transmission system which comprises a primary side electric energy transmitting circuit and a secondary side electric energy receiving circuit;
the primary side power transmitting circuit comprises a DC power supply (E in fig. 5), a full-bridge inverter circuit (switch tube Q in fig. 5) 1 、Q 2 、Q 3 、Q 4 ) Primary resonance compensation network (transmitting-side compensation coil L in fig. 5) t First compensation capacitor C t Second compensation capacitor C p ) And an energy transmitting coil of the wireless charging coupling mechanism as in any one of the examples (L in fig. 5 p1 And L p2 ) The method comprises the steps of carrying out a first treatment on the surface of the In FIG. 5, the equivalent internal resistance R is also included P1 、R P2 Rs; switch tube Q 1 And Q is equal to 2 The drain electrodes (D poles) are connected with the positive pole of the direct current power supply, Q 1 、Q 2 Source (S pole) of (B) is respectively connected with Q 3 、Q 4 The drain electrodes (D poles) of the two electrodes are connected with the two ends of the primary side resonance compensation network respectively, Q 3 、Q 4 The source electrode (S electrode) of the capacitor is connected with the negative electrode of the direct current power supply. The grid electrodes (G poles) of the four switching tubes can be respectively connected with square wave driving signals of 100kHz to carry out constant voltage output. M is M 1 Is L p1 And L is equal to s Mutual inductance M of 2 Is L p2 And L is equal to s Is a mutual inductance of (a).
The secondary side power receiving circuit includes sequentially connected power receiving coils (L in fig. 5) of the wireless charging coupling mechanism as in any one of the examples s ) Secondary side resonance compensation network (C in fig. 5 s ) Rectifying and filtering circuit [ four diodes in fig. 5 and a capacitor (the capacitor is connected in parallel to the load R) L Two ends]And a load (R in FIG. 5) L ）。
The energy transmitting coil comprises a first coil set 12 and a second coil set 13; the first coil group 12 and the second coil group 13 respectively include two coils having axisymmetric patterns with each other; the symmetry axis of the first coil set 12 is the Y axis, and the symmetry axis of the second coil set 13 is the X axis; the first coil group 12 and the second coil group 13 are the same shape;
the first coil set 12 generates a magnetic field in the X horizontal direction, and the second coil set 13 generates a magnetic field in the Y horizontal direction;
when the energy receiving coils are placed along the X-axis direction, the energy receiving coils are mutually coupled with the first coil group 12; the energy receiving coils are coupled to each other with the second coil set 13 when the energy receiving coils are placed in the Y-axis direction.
The energy receiving coil is a solenoid coil 11;
the primary side power transmitting circuit further includes a first switch (Q in fig. 5 5 、Q 6 ) And a second switch (Q in FIG. 5 7 、Q 8 ) The first switch and the second switch are respectively connected with the first coil group 12 and the second coil group 13, and the first switch and the second switch are respectively used for controlling the opening and the closing of the first coil group 12 and the opening and the closing of the second coil group 13;
when the energy receiving coil is placed along the X-axis direction, the first switch is opened, the second switch is closed, and the energy receiving coil and the first coil group 12 are mutually coupled; when the energy receiving coil is placed along the Y-axis direction, the first switch is turned off, the second switch is turned on, and the energy receiving coil and the second coil set 13 are coupled to each other.
The drive signals of the first and second switches being inverted, i.e. Q 5 、Q 6 Drive signal and Q of (2) 7 、Q 8 To ensure that only one set of dual D-type coils is energized. For example, when the solenoid coil 11 on the robot body is placed in the X-axis direction, Q 5 、Q 6 All are opened, Q 7 、Q 8 All are closed, so that the first coil set 12 works to wirelessly charge the robot, and the second coil set 13 does not work; when the solenoid coil 11 on the robot is placed along the Y-axis direction, Q 5 、Q 6 All are closed, Q 7 、Q 8 All open, realize the work of second coil group 13, carry out wireless charging to the robot, and first coil group 12 is inoperative. The first and second switches comprising MOSFET tubes, i.e. switches Q 5 、Q 6 、Q 7 、Q 8 Are MOSFET tubes.
The two groups of double-D-shaped energy transmitting coils can generate horizontal magnetic fields with two dimensions in the X-axis direction and the Y-axis direction, and the energy transmitting coils can realize wireless power transmission no matter the energy receiving coils are arranged along the X-axis direction or the Y-axis direction, so that one degree of freedom is expanded compared with the traditional single double-D-shaped coil, and the energy receiving terminal is subjected to multi-degree-of-freedom wireless charging. For example, a solenoid coil 11 is horizontally arranged on the bottom of the robot body, and the robot can realize wireless charging whether the robot is placed along the X-axis direction or the Y-axis direction.
As shown in fig. 5, a wireless power transmission method is applied to a wireless power transmission system, and the wireless power transmission method in this embodiment performs coupling degree detection based on secondary side dc output voltage when the wireless power transmission system starts charging, and selects a group of double-D-type energy transmitting coils meeting the requirement of the coupling degree to perform charging, and specifically includes the following implementation steps:
the method comprises the following steps:
s1, a secondary side electric energy receiving end (an energy receiving coil is arranged on the secondary side electric energy receiving end) enters a charging area and is required to be charged;
s2, the primary side power module stands by, and communication is established on the primary side and the secondary side;
s3, the first switch (Q 5 、Q 6 ) Open, second switch (Q 7 、Q 8 ) Shut down, provide to Q 1 -Q 4 A drive signal of a minimum duty cycle;
s4, obtaining a first output voltage U o1 The first output voltage U o1 And a preset voltage threshold U set Comparing; first output voltage U o1 The voltage across the load in the secondary side power receiving circuit when the first switch is on and the second switch is off;
s5, if the first output voltage U o1 Greater than or equal to a preset voltage threshold U set Wireless energy transfer is performed to the energy receiving coils through the first coil group 12;
s6, if the first output voltage U o1 Less than a preset voltage threshold U set The first switch is closed and the second switch is opened to provide Q 1 -Q 4 A driving signal with minimum duty ratio to obtain a second output voltage U o2 Second output voltage U o2 And a preset voltage threshold U set Comparing; second output voltage U o2 The voltage of two ends of a load in the secondary side electric energy receiving circuit when the first switch is closed and the second switch is opened;
s7, if the second output voltage U o2 Greater than or equal to a preset voltage threshold U set Wireless energy transfer is then performed to the energy receiving coils by the second coil set 13.
S8, if the second output voltage U o2 Less than a preset voltage threshold U set And if the charging fails, informing the secondary side electric energy receiving end to adjust the placement angle.
The present invention is not limited to the above embodiments, but is to be accorded the widest scope consistent with the principles and other features disclosed herein.
Claims (7)
1. A wireless coupling mechanism that charges which characterized in that: comprises an energy transmitting device and an energy receiving device;
the energy transmitting device comprises an energy transmitting coil; the energy receiving device comprises an energy receiving coil;
the energy transmitting coil comprises a first coil group (12) and a second coil group (13); the first coil group (12) and the second coil group (13) respectively comprise two coils which are mutually in axisymmetric patterns; the symmetry axis of the first coil group (12) is a Y axis, and the symmetry axis of the second coil group (13) is an X axis; the first coil group (12) and the second coil group (13) are the same in shape;
the first coil group (12) generates a magnetic field in the X horizontal direction, and the second coil group (13) generates a magnetic field in the Y horizontal direction;
the energy receiving coil is mutually coupled with the first coil group (12) when the energy receiving coil is placed along the X-axis direction; when the energy receiving coil is placed along the Y-axis direction, the energy receiving coil and the second coil group (13) are mutually coupled;
the first coil group (12) and the second coil group (13) respectively comprise two isosceles trapezoid coils which are axisymmetric; the four isosceles trapezoid coils are positioned on the same plane, and the upper bottom edges of the four isosceles trapezoid coils are close to the origin of coordinates;
the energy transmitting coil comprises a transmitting end compensating coil (14);
the upper bottom edges of the four isosceles trapezoid coils are close to the origin and are connected end to form a square area where the coils are not wound;
the transmitting-end compensation coil (14) is arranged in the square area.
2. The wireless charging coupling mechanism of claim 1, wherein: the parameters of the four isosceles trapezoid coils are consistent.
3. The wireless charging coupling mechanism of claim 1, wherein: the energy emitting device further comprises a magnetic core (15) and a magnetic shielding device, wherein the magnetic core and the magnetic shielding device are of a planar square structure, and the magnetic core (15) is arranged between the magnetic shielding device and the energy emitting coil.
4. A wireless power transfer system, characterized by: comprising
A primary side power transmitting circuit and a secondary side power receiving circuit;
the primary side electric energy transmitting circuit comprises a direct current power supply, a full-bridge inverter circuit, a primary side resonance compensation network and the energy transmitting coil of the wireless charging coupling mechanism as claimed in any one of claims 1 to 3 which are sequentially connected;
the secondary side electric energy receiving circuit comprises an energy receiving coil, a secondary side resonance compensation network, a rectifying and filtering circuit and a load which are sequentially connected with the wireless charging coupling mechanism according to any one of claims 1 to 3;
the energy receiving coil is a solenoid coil;
the primary side electric energy transmitting circuit further comprises a first switch and a second switch, wherein the first switch and the second switch are respectively connected with the first coil group (12) and the second coil group (13), and the first switch and the second switch are respectively used for controlling the opening and closing of the first coil group (12) and the opening and closing of the second coil group (13);
when the energy receiving coil is placed along the X-axis direction, the first switch is opened, the second switch is closed, and the energy receiving coil and the first coil group (12) are mutually coupled; when the energy receiving coil is placed along the Y-axis direction, the first switch is closed, the second switch is opened, and the energy receiving coil and the second coil group (13) are mutually coupled.
5. A wireless power transfer system according to claim 4, wherein: the drive signals of the first switch and the second switch are inverted.
6. A wireless power transfer system according to claim 4, wherein: the first switch and the second switch comprise MOSFET transistors.
7. A wireless power transmission method is characterized in that: use in a wireless power transfer system according to any of claims 4 to 6, comprising the steps of:
s1: when the energy receiving coil enters a charging area, the first switch is turned on, and the second switch is turned off to obtain a first output voltage U o1 ；
S2: the first output voltage U o1 And a preset voltage threshold U set Comparing; if the first output voltage U o1 Greater than or equal to the preset voltage threshold U set Wireless energy transfer is performed to the energy receiving coil through the first coil group (12);
if the first output voltage U o1 Is smaller than the preset voltage threshold U set Closing the first switch and opening the second switch to obtain a second output voltage U o2 ；
S3: the second output voltage U o2 And the preset voltage threshold U set Comparing;
if the second output voltage U o2 Greater than or equal to the preset voltage threshold U set Wireless energy transfer is performed to the energy receiving coil through the second coil group (13);
if the second output voltage U o2 Is smaller than the preset voltage threshold U set And informing the secondary side electric energy receiving end to adjust the placement angle.
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| CN202110856139.6A CN113629893B (en) | 2021-07-28 | 2021-07-28 | Wireless charging coupling mechanism, wireless power transmission system and method |
| PCT/CN2022/103940 WO2023005625A1 (en) | 2021-07-28 | 2022-07-05 | Wireless charging coupling mechanism, and wireless power transmission system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106230127A (en) * | 2016-03-04 | 2016-12-14 | 中惠创智无线供电技术有限公司 | Point-to-point wireless power coil coupling model and point-to-point wireless power supply system |
| CN209729695U (en) * | 2019-06-10 | 2019-12-03 | 张雁 | A kind of high-power wireless charge coil structure |
| CN110635580A (en) * | 2019-11-13 | 2019-12-31 | 西安工程大学 | Multi-degree-of-freedom wireless power transmission device and preparation method thereof |
| CN112910104A (en) * | 2021-01-19 | 2021-06-04 | 国网电力科学研究院有限公司 | Primary side transmitting mechanism, wireless charging circuit structure and charging control method |
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| CN203562809U (en) * | 2013-11-11 | 2014-04-23 | 天津工业大学 | Position-adaptive wireless charging coupler |
| US10348116B2 (en) * | 2015-08-06 | 2019-07-09 | Nxp Usa, Inc. | Wireless power source and method for simultaneous, non-radiative, inductive, wireless power transfer to two or more devices to be charged |
| CN105932788A (en) * | 2016-03-04 | 2016-09-07 | 中惠创智无线供电技术有限公司 | Point-to-point wireless power supply coil coupling model and point-to-point wireless power supply system |
| KR102457491B1 (en) * | 2017-04-21 | 2022-10-21 | 한국전자통신연구원 | 2d circular-array structure wireless power transfer method and apparatus |
| CN109149734B (en) * | 2018-08-06 | 2022-09-23 | 中国电力科学研究院有限公司 | Wireless energy transmission converter and detuning parameter design method and system thereof |
| CN113629893B (en) * | 2021-07-28 | 2023-08-22 | 广西电网有限责任公司电力科学研究院 | Wireless charging coupling mechanism, wireless power transmission system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230127A (en) * | 2016-03-04 | 2016-12-14 | 中惠创智无线供电技术有限公司 | Point-to-point wireless power coil coupling model and point-to-point wireless power supply system |
| CN209729695U (en) * | 2019-06-10 | 2019-12-03 | 张雁 | A kind of high-power wireless charge coil structure |
| CN110635580A (en) * | 2019-11-13 | 2019-12-31 | 西安工程大学 | Multi-degree-of-freedom wireless power transmission device and preparation method thereof |
| CN112910104A (en) * | 2021-01-19 | 2021-06-04 | 国网电力科学研究院有限公司 | Primary side transmitting mechanism, wireless charging circuit structure and charging control method |
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| WO2023005625A1 (en) | 2023-02-02 |
| CN113629893A (en) | 2021-11-09 |
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