CN110581609A - Wireless power transmission magnetic coupling system of electric automobile - Google Patents

Wireless power transmission magnetic coupling system of electric automobile Download PDF

Info

Publication number
CN110581609A
CN110581609A CN201910881053.1A CN201910881053A CN110581609A CN 110581609 A CN110581609 A CN 110581609A CN 201910881053 A CN201910881053 A CN 201910881053A CN 110581609 A CN110581609 A CN 110581609A
Authority
CN
China
Prior art keywords
power transmission
wireless power
magnetic
double
rectangular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910881053.1A
Other languages
Chinese (zh)
Inventor
张立炎
陈思
陈启宏
肖朋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan University of Technology WUT
Original Assignee
Wuhan University of Technology WUT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan University of Technology WUT filed Critical Wuhan University of Technology WUT
Priority to CN201910881053.1A priority Critical patent/CN110581609A/en
Publication of CN110581609A publication Critical patent/CN110581609A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/12—Inductive energy transfer
    • 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
    • H01F27/02—Casings
    • H01F27/022—Encapsulation
    • 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
    • H01F27/08—Cooling; Ventilating
    • H01F27/22—Cooling by heat conduction through solid or powdered fillings
    • 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
    • H01F27/24—Magnetic cores
    • 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
    • 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
    • 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
    • H02J50/10—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
    • 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
    • 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
    • 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
    • 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
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses a wireless electric energy transmission magnetic coupling system of an electric automobile, which comprises a wireless electric energy transmission system transmitting device arranged below a road surface and a wireless electric energy transmission system receiving device arranged at the bottom of the electric automobile, wherein the wireless electric energy transmission system transmitting device and the wireless electric energy transmission system receiving device have the same structure and respectively comprise a packaging plate, a double-rectangular groove for placing a double-rectangular coil is arranged in the middle of the packaging plate, the double-rectangular coil is formed by arranging two rectangular coils side by side, and a ferrite magnetic core is arranged above the double-rectangular coil; an aluminum plate with the same shape as the packaging plate is arranged above the ferrite magnetic core, and the aluminum plate and the packaging plate are fixedly connected through an aluminum ring arranged on the periphery of the side face.

Description

Wireless power transmission magnetic coupling system of electric automobile
Technical Field
The invention relates to the technical field of wireless power transmission, in particular to a wireless power transmission magnetic coupling system of an electric automobile.
Background
The biggest challenge facing the commercialization of electric vehicles is probably the battery problem, and the batteries used at present are still bulky, heavy and expensive. In addition, batteries for electric vehicles are generally made of rare materials and may be explosive when a car accident occurs. The problem of charging batteries is another obstacle to the commercialization of electric vehicles. Since the battery has a relatively low energy density, it must be frequently charged to ensure the running condition of the vehicle. The fast charging times currently available are still too long for drivers accustomed to fast refueling, requiring rather expensive large-sized charging facilities and also severely shortening the battery life.
The power transmission may be wired or wireless. The former is traditionally preferred in the electric vehicle industry because there is no suitable means for wireless power transfer. Although wired electric buses are now no longer widely used in urban areas, the highest speed trains are still powered by a wired power transmission such as a pantograph. The development of wireless power transmission is a necessary trend due to problems caused by abrasion and maintenance in wired power transmission, and wired power transmission is gradually replaced by wireless power transmission as wireless charging can realize hundreds of kilowatts of power.
when the power track for delivering power to an electric vehicle is fully deployed under a roadway, the roadway powered electric vehicle does not require a battery to store energy to provide traction for it, as the electric vehicle can obtain the required power directly from the roadway as it moves over the roadway. In the wireless charging system, a charging cable is replaced by a magnetic coupling resonance type transmission coil, a transmitter coil embedded in a road surface is introduced with high-frequency alternating current for transmitting charging energy to a receiver coil mounted on an automobile chassis through magnetic induction, and the distance between the two coils, namely the ground clearance of the automobile chassis, is defined as an air gap. Therefore, the road wireless charging electric vehicle is not affected by the problems related to the battery in the general electric vehicle, and is very expected to be applied to small-sized vehicles, passenger cars, taxis, buses, trams, trucks, trailers, trains, and the like in the future. Nevertheless, such electric vehicles have not been widely used so far, and the biggest challenge in commercialization is how to transmit high-power energy from the road in an efficient, economical and safe manner.
Magnetic field resonance charging technology is an important type of wireless charging technology. The magnetic coupling resonance type wireless charging is realized by a magnetic coupling resonance principle, the energy of magnetic fields around a radiation source and inside the radiation source in an induction field is repeatedly transferred, and a system transmitting device can be manufactured by an electromagnetic resonance technology by utilizing the phenomenon. The topological structure of the magnetic coupling resonance type electric energy transmission system is composed of a plurality of parts, wherein a transmission coil, a resonance circuit, a protection circuit, a control circuit and the like are important parts. The electromagnetic resonance wireless electric energy transmission device can realize high-efficiency electric energy transmission, the loss energy is smaller, and the transmission power, the transmission distance and the like are more optimized compared with other wireless transmission modes. In the wireless charging device, transmission power and transmission efficiency are emphasized, and in the research on the resonant wireless charging technology, how to set various parameters to optimize the system performance is researched based on a main transmission coil model.
Disclosure of Invention
The invention aims to solve the defects of the background technology, and provides a wireless power transmission magnetic coupling system of an electric vehicle, which can complete high-efficiency power transmission and is suitable for the situation that a transmitting device and a receiving device are deviated, and the system has good deviation performance.
In order to achieve the above object, the invention provides a wireless power transmission magnetic coupling system for an electric vehicle, which comprises a wireless power transmission system transmitting device arranged below a road surface and a wireless power transmission system receiving device arranged at the bottom of the electric vehicle, and is characterized in that the wireless power transmission system transmitting device and the wireless power transmission system receiving device have the same structure and both comprise packaging plates,
The middle part of the packaging plate is provided with a double-rectangular groove for placing double rectangular coils, the double rectangular coils are formed by arranging two rectangular coils side by side, and a ferrite magnetic core is arranged above the double rectangular coils;
And an aluminum plate with the same shape as the packaging plate is arranged above the ferrite magnetic core, and the aluminum plate and the packaging plate are fixedly connected through an aluminum ring arranged on the periphery of the side face.
Furthermore, the coils in the double rectangular coils are spirally wound by adopting a plurality of strands of litz wires from outside to inside, the winding direction of one rectangular coil is set to be clockwise from outside to inside, and the winding direction of the other rectangular coil is set to be anticlockwise from outside to inside. The double rectangular coil has a higher tolerance for offset than a single-pole coil, such as a circular coil, rectangular coil, and has a relatively high coupling coefficient.
Furthermore, the ferrite magnetic core is arranged at the coil window of the double-rectangular coil and consists of an upper layer and a lower layer, the length of the first layer of magnetic core positioned below is 1.5-2.5 times that of the second layer of magnetic core, and the second layer of magnetic core is arranged at the highest position of the magnetic flux density of the first layer of magnetic core. The length of the second layer of magnetic core is about half of that of the first layer of magnetic core. The ferrite core has very high resistivity, and eddy current loss can be ignored, simultaneously because ferrite material has high magnetic conductivity, thereby can reduce the magnetic resistance in the mutual induction region on the one hand and thereby increase the coupling degree of transmitting coil and receiving coil and thereby promote efficiency, thereby on the other hand superpose the magnetic core and can reduce the highest magnetic flux in the magnetic core.
furthermore, the aluminum plate, the aluminum ring and the ferrite core are connected through heat conducting glue. Aluminum plate aluminium ring surrounds the magnetic core, and the two is glued through the heat conduction and is connected, and alternating magnetic field produces the vortex in aluminum plate, has effectively reduced the magnetic leakage in space around, plays the shielding effect to because glue by the heat conduction between magnetic core and the aluminum plate and be connected, can also dispel the heat to the magnetic core.
Furthermore, the distance between the transmitting device of the wireless power transmission system and the receiving device of the wireless power transmission system is set to be within the range of 150-20 mm.
Further, the aspect ratio of the rectangular coil in the double rectangular coils is L: W which is 1.6:1.
Furthermore, the length L of the rectangular coil in the double rectangular coils is equal to or more than 2D, D is the distance between the transmitting device of the wireless power transmission system and the receiving device of the wireless power transmission system, and the transmission performance of the coil is optimal at the moment.
Furthermore, the first layer of magnetic core is composed of a plurality of magnetic strips with the same structure at intervals side by side, and due to the high permeability characteristic of the ferrite magnetic core, the ferrite magnetic core is divided into a plurality of separated magnetic strips, so that the weight of the device is effectively reduced.
furthermore, the second layer of magnetic core is composed of a plurality of magnetic strips with the same structure at intervals side by side, and due to the high permeability characteristic of the ferrite magnetic core, the ferrite magnetic core is divided into a plurality of separated magnetic strips, so that the weight of the device is effectively reduced.
Compared with the prior art, the invention has the advantages that: the wireless charging electric automobile is not affected by the battery problem encountered by the common electric automobile, the charging time is greatly shortened, and electric energy can be obtained during operation. The electric automobile does not need to stop at a charging pile for charging, does not need to be charged by a traction wire in the operation process, and directly receives the energy transmitted by the ground coil to supply power for the automobile. The magnetic resonance type wireless charging technology can realize high-efficiency high-power energy transmission, and due to the unique structure of the transmitting and receiving device, the transmission efficiency and power of the system can be further improved. Simultaneously, in order to reduce the influence of the magnetic field that the system launches to surrounding space environment, still added aluminum plate aluminium ring structure, shielded the magnetic field, made its restraint in the magnetic resonance region to because be connected by the heat conduction glue between magnetic core and the aluminum plate, can also dispel the heat to the magnetic core.
Drawings
Fig. 1 is a schematic diagram of the distribution of the wireless charging magnetic coupling system of the present invention.
Fig. 2 is a schematic diagram of a packaging structure of the transmitting and receiving device of the present invention.
Fig. 3 is a schematic exploded view of a transmitting and receiving device according to the present invention.
In the figure: the wireless power transmission system comprises a wireless power transmission system receiving device 1, a wireless power transmission system transmitting device 22, an aluminum plate 3, an aluminum ring 4, a packaging plate 5, a double rectangular coil 6, a ferrite magnetic core 7, a second layer magnetic core 8 and a first layer magnetic core 9.
Detailed Description
In order to make the technical scheme and the beneficial effects of the invention more clearly understood, the invention is further described in detail below with reference to the accompanying drawings and the embodiments.
the invention provides a wireless power transmission magnetic coupling system of an electric automobile, which comprises a wireless power transmission system transmitting device 2 arranged below a road surface and a wireless power transmission system receiving device 1 arranged at the bottom of the electric automobile. The wireless power transmission system transmitting device 2 and the wireless power transmission system receiving device 1 are arranged in a planar layered mode, have the same structure and comprise a packaging plate 5, a double-rectangular coil 6, a ferrite magnetic core 7, an aluminum plate 3 and an aluminum ring 4.
The middle part of the packaging plate 5 is provided with a double-rectangular groove for placing the double-rectangular coil 6, and the double-rectangular coil 6 is formed by arranging the two rectangular coils side by side. The coils in the double rectangular coils 6 are spirally wound by adopting a plurality of strands of litz wires from outside to inside, the winding direction of one rectangular coil is set to be clockwise from outside to inside, and the winding direction of the other rectangular coil is set to be anticlockwise from outside to inside. The receiving coil structure and the transmitting coil are completely identical. The effect is that the double rectangular coil 6 has a higher tolerance for offset compared to a single-pole coil, such as a circular coil, a rectangular coil, and a relatively high coupling coefficient, and the mutual inductance between the two rectangular coils of the double rectangular coil is very small, which causes negligible losses.
The embedded size of the double rectangular coil 6 is 500 multiplied by 800 multiplied by 6mm3In the package plate 5, the dimensions are 410 x 656 x 4mm3Length-width ratio L: W1.6: 1, and the transmission performance of the coilCan be optimized. The distance between the transmitting device 2 of the wireless power transmission system and the receiving device 1 of the wireless power transmission system is D, D in the electric automobile is generally between 150 and 200mm, and in order to ensure better coupling between the transmitting coil and the receiving coil, the requirement should be met
L≥2D
In the embodiment, a transmission distance of 200mm is selected, the coil is wound by 800 litz wires with the radius of 4mm from outside to the inner plane in a single-layer spiral mode for 15 circles, the winding width is 65mm in consideration of the actual situation, and due to the multi-strand characteristic of the litz wires, the skin effect of the coil is reduced, and the eddy current loss under high frequency can be avoided.
A ferrite magnetic core 7 is arranged above the double rectangular coils 6; the ferrite magnetic core 7 is arranged at the coil window of the double rectangular coil 6 and is composed of an upper layer and a lower layer, the length of the first layer of magnetic core 9 positioned below is 1.5-2.5 times that of the second layer of magnetic core 8, and the second layer of magnetic core 8 is arranged at the highest position of the magnetic flux density of the first layer of magnetic core 9. First layer magnetic core 9, second layer magnetic core 8 constitutes strip ferrite core 7 evenly distributed at the coil window by the same magnetic stripe of a plurality of structures side by side interval respectively, and have bilayer structure, the second layer concentrates on the high place stack of first layer magnetic core magnetic flux density, its effect is that ferrite core 7 has very high resistivity, eddy current loss can be neglected, simultaneously because ferrite material has high magnetic conductivity, thereby can reduce mutual inductance zone's magnetic resistance increase transmitting coil and receiving coil's coupling degree promotion efficiency on the one hand, thereby on the other hand stack magnetic core can reduce the interior highest magnetic flux of magnetic core, general magnetic flux density can not exceed 0.3T.
The dimensions of each magnetic strip of the first layer of magnetic cores 9 in this embodiment are 528 x 34 x 5mm3The diameter of the steel wire is 48 multiplied by 34 multiplied by 5mm3Each strip of the second layer of cores 8 has dimensions of 240 x 34 x 5mm3And the double-rectangular-coil-shaped magnetic strip consists of 6 magnets with the size of 48 multiplied by 34 multiplied by 5mm3, every two magnetic strips are 15mm apart, and 6 magnetic strips are uniformly distributed at the window of the double-rectangular-coil 6. The magnetic core is ferrite magnetic core 7 with high magnetic permeability, which is placed at the part of the mutual inductance magnetic circuit of the transmitting coil through which alternating current passes, and the magnetic resistance of the part is reduced so as to achieve the purpose of improving the coupling degree of the coil.Meanwhile, due to the high magnetic permeability of the ferrite core 7, the ferrite core 7 is divided into a plurality of separated pieces, and the weight of the device is effectively reduced. A layer of magnetic core is superposed at the position where the magnetic flux density of the ferrite magnetic core 7 is higher, so that the heating problem of the magnetic core can be relieved.
An aluminum plate 3 with the same shape as the packaging plate 5 is arranged above the ferrite magnetic core 7, and the aluminum plate 3 and the packaging plate 5 are fixedly connected through an aluminum ring 4 arranged on the periphery of the side face. The aluminum plate 3, the aluminum ring 4 and the ferrite core 7 are connected through heat conducting glue. The aluminum plate 3 has the size of 500X 800X 4mm3The magnetic core and the aluminum plate 3 are connected by heat conducting glue, and the aluminum ring 4 surrounds the magnetic core. The metal shielding plate has the function of conducting performance, eddy current is generated inside metal through a divergent alternating magnetic field, and a magnetic field generated by the eddy current is offset with a magnetic field diverged in a space in turn, so that the shielding effect is performed on the external space.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The utility model provides an electric automobile's wireless power transmission magnetic coupling system, includes wireless power transmission system emitter (2) that set up in the road surface below and sets up in wireless power transmission system receiving arrangement (1) of electric automobile bottom, its characterized in that: the wireless electric energy transmission system transmitting device (2) and the wireless electric energy transmission system receiving device (1) have the same structure and both comprise a packaging plate (5),
A double-rectangular groove for placing a double-rectangular coil (6) is formed in the middle of the packaging plate (5), the double-rectangular coil (6) is formed by arranging two rectangular coils side by side, and a ferrite core (7) is arranged above the double-rectangular coil (6);
The ferrite core (7) is provided with aluminum plate (3) the same with packaging board (5) shape in the top, aluminum plate (3) and packaging board (5) are through setting up in aluminium ring (4) fixed connection of side periphery.
2. The wireless power transmission magnetic coupling system of the electric vehicle according to claim 1, wherein: the coils in the double-rectangular coil (6) are spirally wound by adopting a plurality of strands of litz wires from outside to inside, the winding direction of one rectangular coil is set to be clockwise from outside to inside, and the winding direction of the other rectangular coil is set to be anticlockwise from outside to inside.
3. The wireless power transmission magnetic coupling system of the electric vehicle according to claim 2, wherein: ferrite core (7) are arranged in the coil window department of two rectangular coil (6), constitute by upper and lower two-layer, and the length of first layer magnetic core (9) that is located the below is 1.5 ~ 2.5 times of second layer magnetic core (8) length, and second layer magnetic core (8) set up in the magnetic flux density highest point of first layer magnetic core (9).
4. The wireless power transmission magnetic coupling system of the electric vehicle according to claim 1, wherein: the aluminum plate (3), the aluminum ring (4) and the ferrite magnetic core are connected through heat conducting glue.
5. The wireless power transmission magnetic coupling system of the electric vehicle according to claim 1, wherein: the distance between the wireless power transmission system transmitting device (2) and the wireless power transmission system receiving device (1) is set to be within the range of 150-20 mm.
6. The wireless power transmission magnetic coupling system of the electric vehicle according to claim 1, wherein: the aspect ratio of the rectangular coil in the double rectangular coils (6) is L: W: 1.6:1.
7. The wireless power transmission magnetic coupling system of the electric vehicle according to claim 1, wherein: the length L of the rectangular coil in the double rectangular coils (6) is equal to or more than 2D, and D is the distance between the wireless power transmission system transmitting device (2) and the wireless power transmission system receiving device (1).
8. The wireless power transmission magnetic coupling system of the electric vehicle according to claim 3, wherein: the first layer of magnetic core (9) is composed of a plurality of magnetic strips with the same structure at intervals side by side.
9. The wireless power transmission magnetic coupling system of the electric vehicle according to claim 3, wherein: the second layer of magnetic core (8) is composed of a plurality of magnetic strips with the same structure at intervals side by side.
CN201910881053.1A 2019-09-18 2019-09-18 Wireless power transmission magnetic coupling system of electric automobile Pending CN110581609A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910881053.1A CN110581609A (en) 2019-09-18 2019-09-18 Wireless power transmission magnetic coupling system of electric automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910881053.1A CN110581609A (en) 2019-09-18 2019-09-18 Wireless power transmission magnetic coupling system of electric automobile

Publications (1)

Publication Number Publication Date
CN110581609A true CN110581609A (en) 2019-12-17

Family

ID=68812602

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910881053.1A Pending CN110581609A (en) 2019-09-18 2019-09-18 Wireless power transmission magnetic coupling system of electric automobile

Country Status (1)

Country Link
CN (1) CN110581609A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111641274A (en) * 2020-06-09 2020-09-08 许继集团有限公司 Coupling mechanism applied to wireless power transmission system of electric automobile
CN112092652A (en) * 2020-09-11 2020-12-18 浙江大学 Sectional type dynamic wireless charging magnetic coupling system of electric automobile
CN113815438A (en) * 2021-10-27 2021-12-21 江苏方天电力技术有限公司 Wireless charging device based on electric automobile
CN113871159A (en) * 2021-11-05 2021-12-31 合肥工业大学 Magnetic coupling structure based on ferrite core modular design
WO2022052559A1 (en) * 2020-09-11 2022-03-17 浙江大学 Control system for wireless power transfer system
CN114242414A (en) * 2021-12-23 2022-03-25 桔充充(杭州)新能源有限公司 Wireless charging coil for two-wheeled electric vehicle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106571696A (en) * 2016-06-01 2017-04-19 中兴新能源汽车有限责任公司 Wireless charging system, charging transmitting device, charging receiving device and automobile
CN107786005A (en) * 2017-11-01 2018-03-09 国家电网公司 Double layer screen receiving terminal applied to the magnetic coupling of electric automobile wireless power
CN108063044A (en) * 2017-11-30 2018-05-22 浙江万安亿创电子科技有限公司 A kind of Wireless charging coil and wireless charging system
WO2018192771A1 (en) * 2017-04-20 2018-10-25 Robert Bosch Gmbh Coil suitable for an inductive charging system, comprising two coil sections

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106571696A (en) * 2016-06-01 2017-04-19 中兴新能源汽车有限责任公司 Wireless charging system, charging transmitting device, charging receiving device and automobile
WO2018192771A1 (en) * 2017-04-20 2018-10-25 Robert Bosch Gmbh Coil suitable for an inductive charging system, comprising two coil sections
CN107786005A (en) * 2017-11-01 2018-03-09 国家电网公司 Double layer screen receiving terminal applied to the magnetic coupling of electric automobile wireless power
CN108063044A (en) * 2017-11-30 2018-05-22 浙江万安亿创电子科技有限公司 A kind of Wireless charging coil and wireless charging system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111641274A (en) * 2020-06-09 2020-09-08 许继集团有限公司 Coupling mechanism applied to wireless power transmission system of electric automobile
CN112092652A (en) * 2020-09-11 2020-12-18 浙江大学 Sectional type dynamic wireless charging magnetic coupling system of electric automobile
WO2022052559A1 (en) * 2020-09-11 2022-03-17 浙江大学 Control system for wireless power transfer system
US11601018B2 (en) 2020-09-11 2023-03-07 Zhejiang University Control system for wireless power transfer system
CN113815438A (en) * 2021-10-27 2021-12-21 江苏方天电力技术有限公司 Wireless charging device based on electric automobile
CN113871159A (en) * 2021-11-05 2021-12-31 合肥工业大学 Magnetic coupling structure based on ferrite core modular design
CN113871159B (en) * 2021-11-05 2023-11-03 合肥工业大学 Magnetic coupling structure based on ferrite core modularized design
CN114242414A (en) * 2021-12-23 2022-03-25 桔充充(杭州)新能源有限公司 Wireless charging coil for two-wheeled electric vehicle

Similar Documents

Publication Publication Date Title
CN110581609A (en) Wireless power transmission magnetic coupling system of electric automobile
US10340078B2 (en) Coil topologies for inductive power transfer
US9972434B2 (en) Magnetically permeable structures
US9676285B2 (en) Vehicle charging pad having reduced thickness
US9376026B2 (en) System and method for inductance compensation in wireless power transfer
EP2914454B1 (en) Coil arrangements in wireless power transfer systems for low electromagnetic emissions
JP6126013B2 (en) vehicle
US20130300202A1 (en) Wireless power charging pad and method of construction
US20150255993A1 (en) System and method for reducing emissions for polarized coil systems for wireless inductive power transfer
US20150380157A1 (en) Coil unit and device for the inductive transfer of electrical energy
US20150008877A1 (en) Vehicle
EP2927917B1 (en) Power receiving device and power transmission device
CN105162226B (en) Electric automobile dynamic radio electric power system and method based on enhanced emission coil
CN112092652A (en) Sectional type dynamic wireless charging magnetic coupling system of electric automobile
JP5605442B2 (en) Reactor
Liang et al. Emerging wireless charging systems for electric vehicles-Achieving high power transfer efficiency: A review
KR102306834B1 (en) Receiving apparatus for wireless chargement of electric vehicle and electric vehicle comprising the same
JP6916917B2 (en) Contactless power supply system
EP4043266A1 (en) Wireless power receiving system, moving body, and wheel

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20191217