CN107248788A - The wireless charging system for electric automobile and method of foreign bodies detection are carried out using phaselocked loop - Google Patents
The wireless charging system for electric automobile and method of foreign bodies detection are carried out using phaselocked loop Download PDFInfo
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- CN107248788A CN107248788A CN201710454705.4A CN201710454705A CN107248788A CN 107248788 A CN107248788 A CN 107248788A CN 201710454705 A CN201710454705 A CN 201710454705A CN 107248788 A CN107248788 A CN 107248788A
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Classifications
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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
- H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
-
- 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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- H02J7/0026—
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- H02J7/025—
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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
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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
- 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
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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
- 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
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses the wireless charging system for electric automobile and method that a kind of use phaselocked loop carries out foreign bodies detection, system includes radio energy emitter, radio energy reception device, phaselocked loop and detection signal processor, radio energy emitter and radio energy reception device magnetic coupling, to the certain electromagnetic wave of radio energy reception device frequency of delivery；Radio energy emitter is connected with phaselocked loop to detect electric energy transmitting terminal voltage, current phase, and detection signal processor is by reading voltage, the change of current phase judges being mixed into for metallic foreign body；The frequency electromagnetic waves received are delivered to the two ends of load battery by radio energy reception device, realize the charging to equipment.
Description
Technical field
The present invention relates to the wireless charging system for electric automobile and method that a kind of use phaselocked loop carries out foreign bodies detection.
Background technology
Increasingly sharpen with the increasingly depleted and global warming of fossil fuel, electric automobile goes out as a kind of green
Line mode, is increasingly favored by people.Small to arrive the electronic view car in scenic spot, big to arrive municipal bus, electric automobile is deep
Enter each corner in city.Because of prior art limitation, the battery durable ability that electric car is used is limited, therefore charging problems are urgently
Solve.
At present, electric vehicle charging mode mainly has two kinds：One kind is wired charging, also makes contact charge；It is another
It is wireless charging, also cries contactless charging.Electric automobile wireless charging is to be directed to many weakness of wired charging and propose
A kind of New-type charge mode.Compared to wired charging, wireless charging need not be electrically connected, and be not in contact with the wear and agings such as spark
Problem, and with little need for occupation of land, remote control and scheduling can be accomplished, and be more suitable for adverse circumstances using, exactly by
In these advantages, electric automobile wireless charging is considered as the developing direction in following charging electric vehicle field.
But when wireless charging system electromagnetic coupled area is mixed into metallic foreign body, due to metal magnetic effect and eddy current effect,
Metal meeting steep temperature rise, is possible to trigger fire, this there is huge potential safety hazard when serious.In addition, working as small organisms
When swarming into wireless charging coupled zone by mistake, the injury of frequency electromagnetic waves is also highly prone to, the generation of tragedy is caused.Safety problem is to electricity
The development of motor-car is most important, therefore the test problems of metallic foreign body are urgently to be resolved hurrily.
At present in electric motor car wireless charging field, it has been suggested that the metal foreign matter detecting method come, including balance coil inspection
Survey method and infrared thermal sensor detection method.Although above-mentioned detection method can accomplish the detection to metallic foreign body, above-mentioned
Method needs the extra addition testing agency outside wireless charging system, and this adds increased the complexity of charging system and device
Cost.
The content of the invention
The present invention is in order to solve the above problems, it is proposed that the electric automobile that a kind of use phaselocked loop carries out foreign bodies detection is wireless
Charging system and method, the present invention without additionally adding detection means, flowed through after being mixed into using metal charge coil its voltage,
Current characteristics, which changes, to be detected.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of use phaselocked loop carries out the wireless charging system for electric automobile of foreign bodies detection, including radio energy transmitting dress
Put, radio energy reception device, phaselocked loop and detection signal processor, wherein, the radio energy emitter and radio
Energy reception device magnetic coupling, to the certain electromagnetic wave of radio energy reception device frequency of delivery；The radio energy emitter
Phaselocked loop is connected with to detect electric energy transmitting terminal voltage, current phase, the detection signal processor is by reading voltage, electric current
The change of phase judges being mixed into for metallic foreign body；The radio energy reception device is by the high frequency energy delivery received to negative
The two ends of battery are carried, the charging to equipment is realized.
The radio energy emitter, including be sequentially connected AC power, bridge-type can not control rectifying circuit, direct current cut
Wave circuit, determine frequency inverter circuit and transmitting terminal inductance coil, resonant capacitance.
Further, the AC power, direct current is obtained by bridge rectifier, and DC/DC drops are carried out to direct current
Press copped wave to realize the continuously adjustabe of output voltage, the DC voltage after adjustment is input in full bridge inverter, full-bridge inverting
The switching speed of circuit is fixed on system resonance frequencies, and energy is continuously transferred to receiving terminal by magnetic coupling arrangement.
Further, the radio energy reception device, including be sequentially connected receiving terminal inductance coil, resonant capacitance,
High-frequency rectification circuit, mu balanced circuit and load battery, the high-frequency alternating current of receiving terminal inductance coil output is through high-frequency rectification electricity
Road and mu balanced circuit become the two ends that galvanic current is transported to load battery, realize the charging to equipment.
Further, the transmitting terminal inductance coil constitutes magnetic coupling with receiving terminal inductance coil.
Further, to transmitting terminal inductance coil terminal voltage phase and inductance coil electricity is flowed through respectively using two phaselocked loops
The phase of stream enters horizontal lock.
Further, the phaselocked loop, including phase discriminator, loop filter and voltage controlled oscillator, the phase discriminator detection
The phase difference of input signal and output signal, and the phase signal detected is converted into UDVoltage signal is exported, the signal
The control voltage U of voltage controlled oscillator is formed after low-pass filtered device filteringC, the frequency implementation control to oscillator output signal,
The final signal phase and voltage controlled oscillator output signal Phase synchronization for realizing input phaselocked loop phase discriminator.
Further, the detection signal processor is common to voltage, current phase detection circuit and DC chopper circuit
And inverter circuit.
When energy coupling area is mixed into metallic foreign body, because metal magnetic effect causes the transmitting coil of radio energy emitter
Equivalent inductance changes, and because the capacitance of radio energy emitter immobilizes, inductance coil equivalent inductance value changes, and makes
Into electric capacity, inductance off resonance.
Method of work based on said system, passes through phaselocked loop real time monitoring wireless electric energy transmitting terminal coil-end voltage-phase
With the current phase for flowing through inductance, the phase difference variable of voltage, current phase is turned to judge the foundation that metallic foreign body is mixed into.Nothing
In the case of charging normal when metallic foreign body is mixed into radio energy coupled zone, voltage that phaselocked loop is obtained, current in phase position；Work as energy
Amount transmission range is when being strayed into metallic foreign body, because of the effect of metal magnetic effect being mixed into, and transmitting coil equivalent inductance value changes, stream
Current phase through inductance is not zero with inductance terminal voltage phase difference.
Compared with prior art, beneficial effects of the present invention are：
The present invention is judged by detecting that electric energy launches terminal voltage, current phase change without additionally adding detection means
Being mixed into for metallic foreign body, realizes economical and practicality combination.
The inventive method can accomplish real-time monitoring, and the processor that detection circuit is used is the place in wireless charging circuit
Device is managed, therefore detecting system self-charging starts just to start.Charge and start during the charging complete since electric car, it is any
Metallic foreign body, which is mixed into, can all cause transmitting terminal inductance and electric capacity off resonance, so the metal detection method proposed has real-time
Feature.
Conventional metals detection is required for extra one using addition balance coil detection method and infrared thermoinduction detection method
A whole set of detection means.Wherein infrared thermography detection sensitivity and precision be not high, and needs ability after metal heating
Detect, potential safety hazard is there is in metal temperature-rise period.The present invention is by detecting that charging device voltage itself, current phase enter
Row metal is detected, has greatly saved installation cost.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its illustrate be used for explain the application, do not constitute the improper restriction to the application.
Fig. 1 is the electromagnetic resonance wireless charging system equivalent circuit diagram using string string data resonance structure；
Fig. 2 is the wireless charging system topological diagram with metal-detecting function proposed in the present invention；
Fig. 3 is the metal detection system topological structure proposed in the present invention；
Fig. 4 is phase-locked loop structures figure；
Fig. 5 is to be mixed into transmitting coil voltage, current waveform figure after metal.
Embodiment：
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
It is noted that described further below is all exemplary, it is intended to provide further instruction to the application.Unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
As background technology is introduced, exist to need additionally to add outside wireless charging system in the prior art and detect
Mechanism, this adds increased the complexity of charging system and the deficiency of the cost of device, in order to solve technical problem as above, this
Application proposes the wireless charging system for electric automobile that a kind of use PHASE-LOCKED LOOP PLL TECHNIQUE carries out metallic foreign body detection, including：Wirelessly
Electric energy transmission device；Radio energy reception device；Phaselocked loop；Detection signal processor.Using the magnetic coupling of Regulation Control strategy
In resonance type wireless charging system, the inductance and electric capacity of transmitting coil and receiving coil are in complete resonant condition.Work as radio
Energy transmission range is mixed into after metal, and the magnetic effect of metallic foreign body causes electric energy transmitting terminal transmitting coil inductance value to change, and causes
Transmitting terminal inductance and electric capacity off resonance.The present invention detects transmitting coil terminal voltage phase by phaselocked loop, flows through the electricity of transmitting coil
Phase place change is flowed, judges to whether there is metallic foreign body into wireless charging electromagnetic coupled area.Metallic foreign body based on PHASE-LOCKED LOOP PLL TECHNIQUE
Detection method, without additional extra detection means, by detecting voltage, electricity of the metallic foreign body to electric motor car wireless charging system
The influence of stream phase judges have metallic foreign body to enter radio energy energy transmission range.
Wireless charging technology is broadly divided into three kinds：Radio frequency or microwave wireless power supply technique, induction wireless power skill
Art and electromagnetic resonance wireless power technology.Microwave wireless power supply technique is a kind of remote radiativity energy transmission method,
Following the drawbacks of is to radiate strong, the low problem of efficiency of transmission；And induction wireless power technology is because transmission range
It is shorter, electric motor car wireless charging field can not be also applied at present；
Present invention is generally directed in electromagnetic resonance wireless charging.The following institute of advantage of electromagnetic resonance wireless charging technology
Show：Electric energy transmitting terminal and receiving terminal electric capacity, inductance difference resonance；Resonant frequency is consistent with system frequency；Transmitting coil with
Receiving coil intercouples；Have the advantages that long transmission distance, efficiency of transmission are high.
At present in the world generally using 51kHz and 85kHz frequency electromagnetics transmission electric energy.In view of electromagnetic resonance wireless charging
The principle of power technology, we are according to frequency requirement design matching transmitting terminal and receiving terminal electric capacity, inductance value.When transmitting terminal and reception
System efficiency of transmission highest when end is all in complete resonant condition.
Electromagnetic resonance wireless charging system has four kinds of common resonance manners, including：Transmitting coil series resonance, receives line
Enclose series resonance (string string data)；Transmitting coil series resonance, receiving coil parallel resonance (series-parallel)；Transmitting coil parallel connection is humorous
Shake, receiving coil series resonance (and string data)；Transmitting coil parallel resonance, receiving coil parallel resonance (and simultaneously formula).We with
Illustrate exemplified by most common string string data resonant topology, circuit structure is as shown in Figure 1.Now, inductance and the electricity of electric capacity series connection
Voltage swing equal phase is on the contrary, series resonant circuit is equivalent to short circuit on road generation series resonance, inductance and electric capacity.
The present invention uses following technical scheme：
The present invention is applied to electromagnetic resonance radio energy transmission system as shown in Fig. 2 including radio energy emitter；
Radio energy reception device；Phaselocked loop；Detection signal processor (ARM).
The radio energy emitter includes：Alternating current 220V power supply, diode composition bridge-type can not control rectifying circuit,
DC chopper circuit, determines frequency inverter circuit.The 220V alternating currents of input, the bridge rectifier being made up of diode is obtained
310V or so direct current, the continuously adjustabe from 0V-310V can be realized to 310V direct current progress DC/DC buck choppers.
DC voltage after adjustment is input in full bridge inverter, the switching speed of full bridge inverter is fixed on system resonance frequency
In rate, energy is continuously transferred to receiving terminal by magnetic coupling arrangement.
The radio energy reception device includes：High-frequency rectification circuit, mu balanced circuit loads battery.Receiving coil is defeated
The high-frequency alternating current gone out becomes the two ends that galvanic current is transported to load battery through high-frequency rectification circuit and mu balanced circuit, real
Now to the charging of equipment.
The metallic foreign body detects that circuit as shown in Fig. 3 Blocked portions, is made up of two parts：Phaselocked loop；Signal processor
(ARM)。
The phase-locked loop circuit as shown in figure 4, including：Phase discriminator (PD), loop filter (LF) and voltage controlled oscillator
(VCO)。
We to transmitting terminal inductance coil terminal voltage phase and flow through induction coil current respectively using two phaselocked loops
Phase enters horizontal lock.
Each several part effect is as follows in the phaselocked loop：Phase discriminator (PD) is also known as phase comparator, and its effect is detection
The phase difference of input signal and output signal, and the phase signal detected is converted into UDVoltage signal is exported, the signal
The control voltage U of voltage controlled oscillator is formed after low-pass filtered device filteringC, the frequency implementation control to oscillator output signal.
The final signal phase for accomplishing to input phaselocked loop phase discriminator and voltage controlled oscillator output signal Phase synchronization.
The signal processor is STM32F407ZGT6 chips.The chip core is CortexTM-M4ARM.Voltage, electricity
Flow processor used in phase detecting circuit and share same processor with DC chopper circuit in wireless charging system and inverter circuit.
When energy coupling area is mixed into metallic foreign body, because metal magnetic effect causes transmitting coil equivalent inductance to change.Because of hair
Penetrate end capacitance to immobilize, inductance coil equivalent inductance value changes, so transmitting terminal electric capacity, inductance off resonance.It is exactly sharp
With this phenomenon it is proposed that a kind of metal foreign matter detecting method based on PHASE-LOCKED LOOP PLL TECHNIQUE.
For the wireless charging system using pressure-adjusting type charge control strategy, transmitting terminal electric capacity and inductance are in complete resonance
State, coil-end voltage and current phase difference is zero.Real time monitoring wireless electric energy transmitting terminal coil terminal voltage (UL) phase and stream
Electric current (I through inductanceL) phase, in the case of charging normal when no metallic foreign body is mixed into radio energy coupled zone, phaselocked loop is obtained
Voltage, the current in phase arrived.When energy transmission range is strayed into metallic foreign body, because of the effect of metal magnetic effect being mixed into, transmitting
Coil equivalent inductance value changes.Now, off resonance occurs for transmitting terminal inductance and electric capacity, flows through the current phase and inductance of inductance
Terminal voltage phase difference is not zero, as shown in Figure 5.The voltage that is measured respectively through phaselocked loop (PLL), current phase input ARM processing
Device, detect this phase difference variable is turned to judge the foundation that metallic foreign body is mixed into.
The preferred embodiment of the application is the foregoing is only, the application is not limited to, for the skill of this area
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair
Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, not to present invention protection model
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need to pay various modifications or deform still within protection scope of the present invention that creative work can make.
Claims (10)
1. a kind of use phaselocked loop carries out the wireless charging system for electric automobile of foreign bodies detection, it is characterized in that：Including radio energy
Emitter, radio energy reception device, phaselocked loop and detection signal processor, wherein, the radio energy emitter with
Radio energy reception device magnetic coupling, to the certain frequency electromagnetic waves of radio energy reception device frequency of delivery；The radio
Energy emitter is connected with phaselocked loop to detect electric energy transmitting terminal coil-end voltage-phase and flow through current phase, the detection letter
Number processor is by reading voltage, the change of current phase judges being mixed into for metallic foreign body；The radio energy reception device
The electromagnetic energy received is delivered to the two ends of load battery, the charging to equipment is realized.
2. a kind of use phaselocked loop as claimed in claim 1 carries out the wireless charging system for electric automobile of foreign bodies detection, it is special
Levying is：The radio energy emitter, including the AC power, the bridge-type that are sequentially connected can not control rectifying circuit, DC chopped-waves
Circuit, determine frequency inverter circuit and transmitting terminal inductance coil, resonant capacitance.
3. a kind of use phaselocked loop as claimed in claim 2 carries out the wireless charging system for electric automobile of foreign bodies detection, it is special
Levying is：The AC power, direct current is obtained by bridge rectifier, and direct current is carried out DC/DC buck choppers to realize
The continuously adjustabe of output voltage, the DC voltage after adjustment is input in full bridge inverter, the switch speed of full bridge inverter
Degree is fixed on system resonance frequencies, and energy is continuously transferred to receiving terminal by magnetic coupling arrangement.
4. a kind of use phaselocked loop as claimed in claim 1 carries out the wireless charging system for electric automobile of foreign bodies detection, it is special
Levying is：The radio energy reception device, including be sequentially connected receiving terminal inductance coil, resonant capacitance, high-frequency rectification circuit,
Mu balanced circuit and load battery, the high-frequency alternating current of receiving terminal inductance coil output become through high-frequency rectification circuit and mu balanced circuit
The two ends of load battery are transported into galvanic current, the charging to equipment is realized.
5. a kind of use phaselocked loop as claimed in claim 3 carries out the wireless charging system for electric automobile of foreign bodies detection, it is special
Levying is：The transmitting terminal inductance coil constitutes magnetic coupling with receiving terminal inductance coil.
6. a kind of use phaselocked loop as claimed in claim 1 carries out the wireless charging system for electric automobile of foreign bodies detection, it is special
Levying is：Transmitting terminal inductance coil terminal voltage phase is carried out with the phase for flowing through induction coil current respectively using two phaselocked loops
Lock phase.
7. a kind of use phaselocked loop as claimed in claim 1 carries out the wireless charging system for electric automobile of foreign bodies detection, it is special
Levying is：The phaselocked loop, including phase discriminator, loop filter and voltage controlled oscillator, the phase discriminator detect input signal and defeated
Go out the phase difference of signal, and the phase signal detected is converted into UDVoltage signal is exported, the low-pass filtered device of the signal
The control voltage U of voltage controlled oscillator is formed after filteringC, the frequency to oscillator output signal is implemented to control, final to realize input
The signal phase of phaselocked loop phase discriminator and voltage controlled oscillator output signal Phase synchronization.
8. a kind of use phaselocked loop as claimed in claim 1 carries out the wireless charging system for electric automobile of foreign bodies detection, it is special
Levying is：The detection signal processor is common to voltage, current phase detection circuit and DC chopper circuit and inverter circuit.
9. a kind of use phaselocked loop as claimed in claim 1 carries out the wireless charging system for electric automobile of foreign bodies detection, it is special
Levying is：When energy coupling area is mixed into metallic foreign body, because metal magnetic effect causes transmitting coil of radio energy emitter etc.
Imitate inductance to change, because the capacitance of radio energy emitter immobilizes, inductance equivalent inductance value changes, and causes electricity
Appearance, inductance off resonance.
10. based on the method for work of system as claimed in any one of claims 1-9 wherein, it is characterized in that：It is real-time by phaselocked loop
Monitoring radio energy transmitting terminal coil-end voltage-phase and the current phase for flowing through inductance, by voltage, the phase difference of current phase
Change is turned to judge the foundation that metallic foreign body is mixed into；Situation is charged normal when being mixed into radio energy coupled zone without metallic foreign body
Under, voltage that phaselocked loop is obtained, current in phase position；When energy transmission range is strayed into metallic foreign body, because of the metal magnetic effect being mixed into
Effect, transmitting coil equivalent inductance value changes, and the current phase and inductance terminal voltage phase difference for flowing through inductance are not zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710454705.4A CN107248788B (en) | 2017-06-15 | 2017-06-15 | Electric vehicle wireless charging system and method for detecting foreign matters by adopting phase-locked loop |
Applications Claiming Priority (1)
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| CN109004759A (en) * | 2018-08-07 | 2018-12-14 | 吉林大学 | A kind of automobile wireless charging system barrier metallization identification and removed automatically |
| CN109193889A (en) * | 2018-10-24 | 2019-01-11 | 中尔（深圳）电能科技有限公司 | Wireless charging system |
| WO2020087360A1 (en) * | 2018-10-31 | 2020-05-07 | 华为技术有限公司 | Wireless charging receiving apparatus, method, terminal, and system |
| CN109888894A (en) * | 2019-03-11 | 2019-06-14 | 太原理工大学 | A kind of wireless charging high frequency electric source |
| CN110146927B (en) * | 2019-05-16 | 2022-02-15 | 京东方科技集团股份有限公司 | Charging system, foreign matter detection method and component, and charging control method and device |
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| TWI757724B (en) * | 2020-04-14 | 2022-03-11 | 國立虎尾科技大學 | Wireless power transmitter and power supply having the same |
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| CN111775739A (en) * | 2020-07-17 | 2020-10-16 | 中兴新能源汽车有限责任公司 | Foreign matter detection method, device and system for wireless charging system and electronic equipment |
| CN113103887A (en) * | 2021-04-08 | 2021-07-13 | 中国第一汽车股份有限公司 | Charging pairing method and device, electronic equipment, system and storage medium |
| US12021407B2 (en) | 2021-04-29 | 2024-06-25 | Huawei Technologies Co., Ltd. | Wireless charging receiving apparatus, method, terminal, and system |
| CN114094723A (en) * | 2021-11-19 | 2022-02-25 | 深圳威迈斯新能源股份有限公司 | Wireless charging transmitting terminal |
| CN114024374A (en) * | 2021-11-23 | 2022-02-08 | 桔充充(杭州)新能源有限公司 | Wireless charging system for two-wheeled electric vehicle and foreign matter detection and power regulation method |
| CN114024374B (en) * | 2021-11-23 | 2023-12-15 | 桔充充(杭州)新能源有限公司 | Wireless charging system of two-wheeled electric vehicle and foreign matter detection and power adjustment method |
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| CN114627604B (en) * | 2022-02-22 | 2024-06-04 | 北京无线电计量测试研究所 | Underground pipe gallery state monitoring and early warning method and system |
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