CN206202015U - Electric automobile resonance type wireless charging device - Google Patents
Electric automobile resonance type wireless charging device Download PDFInfo
- Publication number
- CN206202015U CN206202015U CN201621287478.8U CN201621287478U CN206202015U CN 206202015 U CN206202015 U CN 206202015U CN 201621287478 U CN201621287478 U CN 201621287478U CN 206202015 U CN206202015 U CN 206202015U
- Authority
- CN
- China
- Prior art keywords
- wireless charging
- transmitting coil
- coil
- driving chips
- electric automobile
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
- Y02T10/72—Electric energy management in electromobility
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
The utility model discloses a kind of electric automobile resonance type wireless charging device, including the wireless charging emitter and the car body wireless charging receiver being arranged on car body for being arranged on underground;The wireless charging emitter is provided with AC power supplies, and the AC power supplies is connected by rectification circuit and inverter circuit with transmitting coil;The car body wireless charging receiver is provided with receiving coil, the receiving coil is connected by rectification circuit with battery pack, the receiving coil concatenates a compensating electric capacity with transmitting coil, and the receiving coil is used for the alternating magnetic field resonance produced with transmitting coil to receive the electric energy from the transmitting coil;Its effect is:With long transmission distance, transimission power is big, the advantage insensitive to the dislocation between coil.
Description
Technical field
The invention belongs to wireless charging system for electric automobile field, and in particular to a kind of electric automobile resonance type wireless charges
Device.
Background technology
The charging modes of traditional electric automobile are mainly wired charging modes, but wired charging modes of routine are present
Many weak points, charging station needs to lay feed cable, is connected as with the charging device of electric automobile by wire during charging
Charging electric vehicle, and whole charging process needs artificial operation, when electric motor car charges, if band in charging socket or cable
Electric conductor is exposed outside, is susceptible to Danger Electric shock risk, and potential safety hazard is brought to user.
Existing wireless charging product generally carries out energy transmission, but electromagnetic induction wireless power transmission using electromagnetic induction
Technology has the shortcomings of transmission range is short, and transimission power is small.Meanwhile, receiving coil can not have larger skew with transmitting coil.
The content of the invention
In order to solve the above problems, the utility model provides a kind of electric automobile resonance type wireless charging device, solves mesh
In preceding wireless charging technology, transmission range is short, transimission power is small and receiving coil and transmitting coil can not have lacking for larger skew
Fall into.
The technical scheme that the utility model is taken is:A kind of electric automobile resonance type wireless charging device, including be arranged on
The wireless charging emitter of underground and the car body wireless charging receiver being arranged on car body;
The wireless charging emitter is provided with AC power supplies, and the AC power supplies is by rectification circuit and inverter circuit and hair
Ray circle is connected, and the transmitting coil also concatenates a compensating electric capacity;The rectification circuit is used for the friendship for providing the AC power supplies
Stream electricity is transformed to direct current;The inverter circuit be used for by DC inverter into a certain frequency alternating current;The wireless charging
Emitter is additionally provided with voltage-current sensor, A/D converter circuit, controller and drive circuit, the voltage-current sensor
Electric current, magnitude of voltage for detecting the transmitting coil, and the value that will be detected, by A/D converter circuit and the controller
Input is connected, and the output end of the controller is connected with drive circuit, and the controller is used for output control signal, the drive
The control signal that dynamic circuit is exported according to controller controls the switching frequency of inverter circuit;
The drive circuit uses two panels IR2110 chips, an IR2110 driving chips and the 2nd IR2110 driving chips
Input HIN, LIN receive logical signal input, after the output end HO series resistors R1 of an IR2110 driving chips
Grid with the inverter circuit breaker in middle device Q1 is connected, the output end LO series resistors of an IR2110 driving chips
Grid after R2 with the inverter circuit breaker in middle device Q2 is connected, the output end HO concatenations of the 2nd IR2110 driving chips
Grid after resistance R4 with the inverter circuit breaker in middle device Q3 is connected, the output end LO of the 2nd IR2110 driving chips
Grid after series resistor R3 with the inverter circuit breaker in middle device Q4 is connected, the switching device Q1's and switching device Q3
Drain electrode is connected with power supply VCC2, is connected with one end of transmitting coil after the source electrode serial capacitance C8 of the switching device Q1, described
The other end of transmitting coil is connected with the drain electrode of the switching device Q4, and the source electrode of the switching device Q4 and switching device Q2 is straight
Ground connection, the source electrode drained also with the switching device Q3 of the switching device Q4 is connected, the drain electrode of the switching device Q2
Source electrode also with the switching device Q1 is connected, and is provided between the output end VB and VS of an IR2110 driving chips certainly
Electric capacity C3 is lifted, bootstrap capacitor C5, described first are provided between the output end VB and VS of the 2nd IR2110 driving chips
Be provided with isolation capacitance C4 between the output end VCC and COM of IR2110 driving chips, the 2nd IR2110 driving chips it is defeated
Go out to hold and be provided between VCC and COM isolation capacitance C6;
The car body wireless charging receiver is provided with receiving coil, and the receiving coil passes through rectification circuit and battery
Group connection, the receiving coil also concatenates a compensating electric capacity, and the receiving coil is used for the alternating magnetic field produced with transmitting coil
Resonance is receiving the electric energy from the transmitting coil.
The receiving coil is arranged at the bottom of car body, is easy to receive the electricity that the transmitting coil for being arranged on underground is emitted
Can, and it is not take up the space of automobile.
The receiving coil is 20-60cm with the relative distance of the transmitting coil in the vertical direction, both ensure that vapour
The normally travel of car, also ensure that the efficiency of wireless charging.
The receiving coil is wound on FERRITE CORE with transmitting coil, for avoiding and other the circuit portions on automobile
Divide and produce interference.
The receiving coil uses enamel-covered wire coiling with transmitting coil, and the coil turn of coiling is identical, so launches
Coil is as the resonant frequency of receiving coil, that is, resonant frequency is the same, is by magnetic resonance side when carrying out energy transmission
Formula is transmitted.
Diode in the rectification circuit is fast recovery diode, the compensation that the receiving coil is concatenated with transmitting coil
Capacitor's capacity is identical.
Using above-mentioned technical proposal, with advantages below:The utility model proposes a kind of electric automobile resonance type wireless
Charging device, with long transmission distance, transimission power is big, insensitive to the dislocation between coil.
Brief description of the drawings
Fig. 1 is system block diagram of the present utility model;
Fig. 2 is use schematic diagram of the present utility model;
Fig. 3 is driver circuit schematic diagram of the present utility model.
Specific embodiment
In order that the technical problems to be solved in the utility model, technical scheme and advantage are clearer, below in conjunction with attached
Figure and specific embodiment are described in detail, and description here does not mean that the institute corresponding to the instantiation of statement in embodiment
There is theme all to refer in the claims.
A kind of electric automobile resonance type wireless charging device is can be seen that from Fig. 1, Fig. 2, including is arranged on the wireless of underground
Charging emitter and the car body wireless charging receiver being arranged on car body;
The wireless charging emitter is provided with AC power supplies, and the AC power supplies is by rectification circuit and inverter circuit and hair
Ray circle is connected, and the transmitting coil also concatenates a compensating electric capacity;The rectification circuit is used for the friendship for providing the AC power supplies
Stream electricity is transformed to direct current;The inverter circuit be used for by DC inverter into a certain frequency alternating current;The wireless charging
Emitter is additionally provided with voltage-current sensor, A/D converter circuit, controller and drive circuit, the voltage-current sensor
Electric current, magnitude of voltage for detecting the transmitting coil, and the value that will be detected, by A/D converter circuit and the controller
Input is connected, and the output end of the controller is connected with drive circuit, and the controller is used for output control signal, the drive
The control signal that dynamic circuit is exported according to controller controls the break-make of inverter circuit;
The car body wireless charging receiver is provided with receiving coil, and the receiving coil is arranged at the bottom of car body,
It is 20-60cm with the relative distance of the transmitting coil in the vertical direction, the receiving coil passes through rectification circuit and battery
Group connection, the receiving coil also concatenates a compensating electric capacity, the compensating electric capacity capacitance of the compensating electric capacity and the transmitting coil
Identical, the receiving coil is used for the alternating magnetic field resonance produced with transmitting coil to receive the electricity from the transmitting coil
Energy.
From figure 3, it can be seen that drive circuit of the present utility model, the drive circuit uses two panels IR2110 chips, the
Input HIN, LIN of one IR2110 driving chips and the 2nd IR2110 driving chips receive logical signal input, described first
It is connected with the grid of the inverter circuit breaker in middle device Q1 after the output end HO series resistors R1 of IR2110 driving chips, it is described
It is connected with the grid of the inverter circuit breaker in middle device Q2 after the output end LO series resistors R2 of the first IR2110 driving chips,
Grid after the output end HO series resistors R4 of the 2nd IR2110 driving chips with the inverter circuit breaker in middle device Q3
Connection, with the inverter circuit breaker in middle device Q4's after the output end LO series resistors R3 of the 2nd IR2110 driving chips
Grid is connected, and the drain electrode of the switching device Q1 and switching device Q3 is connected with power supply VCC2, the source electrode of the switching device Q1
It is connected with one end of transmitting coil after serial capacitance C8, the other end of the transmitting coil connects with the drain electrode of the switching device Q4
Connect, the source electrode of the switching device Q4 and switching device Q2 is directly grounded, the drain electrode of the switching device Q4 also with the switch
The source electrode connection of device Q3, the source electrode drained also with the switching device Q1 of the switching device Q2 is connected, and described first
Bootstrap capacitor C3, the output of the 2nd IR2110 driving chips are provided between the output end VB and VS of IR2110 driving chips
Bootstrap capacitor C5 is provided between the VB and VS of end, is provided between the output end VCC and COM of an IR2110 driving chips
Isolation capacitance C4, isolation capacitance C6 is provided between the output end VCC and COM of the 2nd IR2110 driving chips.
Preferred embodiment, a kind of electric automobile resonance type wireless charging device, including the wireless charging for being arranged on underground
Emitter and the car body wireless charging receiver being arranged on car body;
The wireless charging emitter is provided with AC power supplies, and the AC power supplies is by rectification circuit and inverter circuit and hair
Ray circle is connected, and the transmitting coil also concatenates a compensating electric capacity;The rectification circuit is used for the friendship for providing the AC power supplies
Stream electricity is transformed to direct current;The inverter circuit is used for inverse of the DC into AC;The wireless charging emitter is also
Voltage-current sensor, A/D converter circuit, controller and drive circuit are provided with, the voltage-current sensor is used to detect institute
Electric current, the magnitude of voltage of transmitting coil, and the value that will be detected are stated, is connected with the input of the controller by A/D converter circuit
Connect, the output end of the controller is connected with drive circuit, the controller is used for output control signal, the drive circuit root
The control signal exported according to controller controls the switching frequency of inverter circuit;
The car body wireless charging receiver is provided with receiving coil, and the receiving coil passes through rectification circuit and battery
Group connection, the receiving coil also concatenates a compensating electric capacity, and the diode in the rectification circuit is fast recovery diode, described
Receiving coil is used for the alternating magnetic field resonance produced with transmitting coil to receive the electric energy from the transmitting coil;
By the way that the receiving coil to be arranged at the bottom of car body, and with the relative distance of transmitting coil in the vertical direction
It is 40cm, improves the efficiency of wireless charging, also ensure that the normally travel of automobile.
In order to ensure that the receiving coil is identical with the resonant frequency of the transmitting coil, passed by way of EMR electromagnetic resonance
Transmission of electricity energy, the receiving coil uses material identical enamel-covered wire coiling with transmitting coil, and the coil turn of coiling is identical,
The receiving coil is identical with the compensating electric capacity capacitance that transmitting coil is concatenated.
Operation principle of the present utility model is, a kind of electric automobile resonance type wireless charging device, including is arranged on underground
Wireless charging emitter and the car body wireless charging receiver that is arranged on car body, when automobile needs to charge, by car
The top of wireless charging emitter transmitting coil is rested in, the phase of the voltage x current of transmitting coil is detected by sensor
Difference, controller is sent to by detected value by AD conversion circuits, and controller output control signal control drive circuit drives inverse
Become the switching device in circuit, make the frequency of inverter voltage consistent with the resonant frequency of transmitting coil, then by transmitting coil and
Receiving coil carries out magnetic resonance transmission electric energy.
Finally it should be noted that foregoing description is preferred embodiment of the present utility model, but the utility model protection model
Enclose and be not limited thereto, equivalent or change are subject to according to the technical solution of the utility model and its inventive concept, should all contain
Cover within protection domain of the present utility model.
Claims (8)
1. a kind of electric automobile resonance type wireless charging device, it is characterised in that:Wireless charging including being arranged on underground is launched
Device and the car body wireless charging receiver being arranged on car body;
The wireless charging emitter is provided with AC power supplies, and the AC power supplies is by rectification circuit and inverter circuit and emission lines
Circle connection;The convert alternating current that the rectification circuit is used to provide the AC power supplies is direct current;The inverter circuit is used for
Inverse of the DC into AC;The wireless charging emitter is additionally provided with voltage-current sensor, A/D converter circuit, control
Device processed and drive circuit, the voltage-current sensor are used to detect electric current, the magnitude of voltage of the transmitting coil, and will be detected
Value, be connected with the input of the controller by A/D converter circuit, the output end of the controller is connected with drive circuit,
The controller is used for output control signal, the control signal control inverter circuit that the drive circuit is exported according to controller
Switching frequency;
The car body wireless charging receiver is provided with receiving coil, and the receiving coil is connected by rectification circuit with battery pack
Connect, the receiving coil concatenates a compensating electric capacity with transmitting coil, the receiving coil is used for the friendship produced with transmitting coil
Varying magnetic field resonance is receiving the electric energy from the transmitting coil.
2. a kind of electric automobile resonance type wireless charging device according to claim 1, it is characterised in that the reception line
Circle is arranged at the bottom of car body.
3. a kind of electric automobile resonance type wireless charging device according to claim 1, it is characterised in that the reception line
It is 20-60cm to enclose with the relative distance of the transmitting coil in the vertical direction.
4. a kind of electric automobile resonance type wireless charging device according to claim 1, it is characterised in that the reception line
Circle is wound on FERRITE CORE with transmitting coil.
5. a kind of electric automobile resonance type wireless charging device according to claim 1, it is characterised in that the reception line
Circle uses material identical enamel-covered wire coiling with transmitting coil, and the coil turn of coiling is identical.
6. a kind of electric automobile resonance type wireless charging device according to claim 1, it is characterised in that the rectified current
Diode in road is fast recovery diode.
7. a kind of electric automobile resonance type wireless charging device according to claim 1, it is characterised in that the reception line
Enclose identical with the compensating electric capacity capacitance that transmitting coil is concatenated.
8. a kind of electric automobile resonance type wireless charging device according to claim 1, it is characterised in that the driving electricity
Road uses input HIN, LIN of two panels IR2110 chips, an IR2110 driving chips and the 2nd IR2110 driving chips to connect
Logical signal input is received, is opened with the inverter circuit after the output end HO series resistors R1 of an IR2110 driving chips
The grid connection of device Q1 is closed, with the inverter circuit after the output end LO series resistors R2 of an IR2110 driving chips
The grid connection of breaker in middle device Q2, with the inversion after the output end HO series resistors R4 of the 2nd IR2110 driving chips
Circuit breaker in middle device Q3 grid connection, after the output end LO series resistors R3 of the 2nd IR2110 driving chips with it is described
The grid connection of inverter circuit breaker in middle device Q4, drain electrode and the power supply VCC2 of the switching device Q1 and switching device Q3 connect
Connect, be connected with one end of transmitting coil after the source electrode serial capacitance C8 of the switching device Q1, the other end of the transmitting coil
Drain electrode with the switching device Q4 is connected, and the source electrode of the switching device Q4 and switching device Q2 is directly grounded, the switch
The source electrode of the drain electrode also with the switching device Q3 of device Q4 is connected, the drain electrode of the switching device Q2 also with the switching device
The source electrode connection of Q1, is provided with bootstrap capacitor C3 between the output end VB and VS of an IR2110 driving chips, and described the
Be provided with bootstrap capacitor C5 between the output end VB and VS of two IR2110 driving chips, an IR2110 driving chips it is defeated
Go out to hold be provided between VCC and COM isolation capacitance C4, set between the output end VCC and COM of the 2nd IR2110 driving chips
It is equipped with isolation capacitance C6.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201621287478.8U CN206202015U (en) | 2016-11-28 | 2016-11-28 | Electric automobile resonance type wireless charging device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201621287478.8U CN206202015U (en) | 2016-11-28 | 2016-11-28 | Electric automobile resonance type wireless charging device |
Publications (1)
Publication Number | Publication Date |
---|---|
CN206202015U true CN206202015U (en) | 2017-05-31 |
Family
ID=58748443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201621287478.8U Expired - Fee Related CN206202015U (en) | 2016-11-28 | 2016-11-28 | Electric automobile resonance type wireless charging device |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN206202015U (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108631449A (en) * | 2018-05-10 | 2018-10-09 | 常州星宇车灯股份有限公司 | A kind of radio energy transmission system of automobile tail light |
CN108879997A (en) * | 2018-08-07 | 2018-11-23 | 吉林大学 | A kind of automatic tuning wireless energy transmission device based on capacitance compensation |
CN108880001A (en) * | 2018-08-07 | 2018-11-23 | 吉林大学 | A kind of wireless energy transmission device based on the resonance of magnetic coupling |
CN108879999A (en) * | 2018-08-07 | 2018-11-23 | 吉林大学 | A kind of reactance adaptive wireless energy emission system |
CN109038853A (en) * | 2018-08-07 | 2018-12-18 | 吉林大学 | A kind of wireless energy transform device of self-adapting load |
CN109038855A (en) * | 2018-08-07 | 2018-12-18 | 吉林大学 | Based on magnetic coupling resonance formula wireless charging system for electric automobile |
CN110165755A (en) * | 2019-05-30 | 2019-08-23 | 吴忠隐 | A kind of wireless charging device |
CN112693335A (en) * | 2021-01-15 | 2021-04-23 | 西华大学 | Electric bicycle charging device based on wireless power transmission technology |
WO2022257087A1 (en) * | 2021-06-10 | 2022-12-15 | 华为技术有限公司 | Method and apparatus for wireless charging |
-
2016
- 2016-11-28 CN CN201621287478.8U patent/CN206202015U/en not_active Expired - Fee Related
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108631449A (en) * | 2018-05-10 | 2018-10-09 | 常州星宇车灯股份有限公司 | A kind of radio energy transmission system of automobile tail light |
CN108631449B (en) * | 2018-05-10 | 2024-03-22 | 常州星宇车灯股份有限公司 | Wireless power transmission system of automobile tail lamp |
CN109038855B (en) * | 2018-08-07 | 2022-02-22 | 吉林大学 | Resonance type wireless charging system for electric automobile based on magnetic coupling |
CN108879999A (en) * | 2018-08-07 | 2018-11-23 | 吉林大学 | A kind of reactance adaptive wireless energy emission system |
CN109038853A (en) * | 2018-08-07 | 2018-12-18 | 吉林大学 | A kind of wireless energy transform device of self-adapting load |
CN109038855A (en) * | 2018-08-07 | 2018-12-18 | 吉林大学 | Based on magnetic coupling resonance formula wireless charging system for electric automobile |
CN108879997B (en) * | 2018-08-07 | 2022-02-22 | 吉林大学 | Automatic tuning wireless energy transmitting device based on capacitance compensation |
CN108880001A (en) * | 2018-08-07 | 2018-11-23 | 吉林大学 | A kind of wireless energy transmission device based on the resonance of magnetic coupling |
CN109038853B (en) * | 2018-08-07 | 2022-03-15 | 吉林大学 | Wireless energy transmission device capable of self-adapting to load |
CN108879999B (en) * | 2018-08-07 | 2022-03-22 | 吉林大学 | Reactance self-adaptive wireless energy transmitting system |
CN108879997A (en) * | 2018-08-07 | 2018-11-23 | 吉林大学 | A kind of automatic tuning wireless energy transmission device based on capacitance compensation |
CN110165755A (en) * | 2019-05-30 | 2019-08-23 | 吴忠隐 | A kind of wireless charging device |
CN112693335A (en) * | 2021-01-15 | 2021-04-23 | 西华大学 | Electric bicycle charging device based on wireless power transmission technology |
WO2022257087A1 (en) * | 2021-06-10 | 2022-12-15 | 华为技术有限公司 | Method and apparatus for wireless charging |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN206202015U (en) | Electric automobile resonance type wireless charging device | |
JP5146488B2 (en) | Power feeding system and vehicle | |
US8418823B2 (en) | Electrically powered vehicle | |
US8816537B2 (en) | Contactless electric power receiving apparatus, contactless electric power transmitting apparatus, contactless electric power feeding system, and vehicle | |
EP2773019B1 (en) | Non-contact power receiving apparatus | |
EP2523823B1 (en) | Power transmission system and power supply device for vehicles | |
JP4868077B2 (en) | Power feeding system and electric vehicle | |
JP4947241B2 (en) | Coil unit, contactless power receiving device, contactless power transmitting device, contactless power feeding system, and vehicle | |
US10153664B2 (en) | Wireless power transmission system and power transmitter | |
CN103946057B (en) | Vehicle current-collecting device and possess the vehicle of this device, power supply unit and electrical power transmission system | |
JP2013005614A (en) | Power transmission equipment, power incoming equipment, vehicle, and non-contact power supply system | |
JP2011166992A (en) | Power supply apparatus | |
CN104333101A (en) | On-line electric automobile power supply system based on wireless power transmission technique | |
CN106451818A (en) | Wheel hub motor wireless power supply system based on magnetic coupling resonance | |
JP2015231306A (en) | Non-contact power reception device | |
CN104871400A (en) | Vehicle, power transmission device and power feeding system | |
CN106347152A (en) | Wireless power transmission system of electric automobile | |
JP5696674B2 (en) | Electric vehicle | |
CN205453251U (en) | Intelligent charging system for electric automobile | |
CN103904757A (en) | Wireless charging system of electric automobile | |
CN201674242U (en) | Wireless induction charger | |
CN207442541U (en) | Inductive electric energy transmission system | |
JP5761507B2 (en) | Power transmission system | |
CN207416595U (en) | A kind of electric tractor wireless charging device | |
JP5812264B2 (en) | Power transmission system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170531 Termination date: 20171128 |
|
CF01 | Termination of patent right due to non-payment of annual fee |