CN103795154B - A kind of load validity decision method of induction type radio energy transmission system - Google Patents
A kind of load validity decision method of induction type radio energy transmission system Download PDFInfo
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- CN103795154B CN103795154B CN201310596823.0A CN201310596823A CN103795154B CN 103795154 B CN103795154 B CN 103795154B CN 201310596823 A CN201310596823 A CN 201310596823A CN 103795154 B CN103795154 B CN 103795154B
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Abstract
The load validity decision method of a kind of induction type radio energy transmission system, the steps include: energy transmitting terminal: controller control transmitting coil produces faint excitatory magnetic field；And detection in real time, record transmitting coil electric current, and demodulate frequency pulse from the envelope of transmitting coil electric current, and the key built-in with it is verified, if being verified, then injecting specified high-frequency alternating current to transmitting coil, system enters normal biography can duty.Energy picks up end: when the electromotive force that pick-up winding induces is less than when setting threshold value, the controller control BOOST DC transfer circuit of energy pickup end is operated in low frequency modal, and using the pulse train containing checking information as its switch controlling signal, there is corresponding change in the amplitude making pick-up winding electric current, and is coupled on transmitting coil；When the electromotive force that pick-up winding induces exceedes setting threshold value, BOOST DC transfer circuit is switched to high frequency mode, and energy pickup end enters normal interrogation energy state.
Description
Technical field
The present invention relates to the load validity decision method of a kind of induction type radio energy transmission system.
Background technology
Induction type wireless power transmission (ICPT) technology is a kind of based on electromagnetic field near field loose coupling principle of induction,
Comprehensive utilization Technics of Power Electronic Conversion technology, magnetic field coupling technique and control theory, it is achieved electrical equipment is with non-
Conductive contact mode from electrical network obtain energy technology, have power supply flexible, safe and reliable, maintenance cost is low
Etc. feature.
The typical structure of one ICPT system is typically picked up end by entirely electrical independent energy transmitting terminal and energy
Two part compositions, wherein energy transmitting terminal and the relation of energy pickup end can be man-to-man, it is also possible to
It is one-to-many.The general principle of ICPT system is to utilize controlled resonant converter by industrial-frequency alternating current or direct current
Being transformed to high-frequency alternating current, the transmitting coil (or guide rail coil) of Implantation Energy transmitting terminal, based on electromagnetic induction
Principle, the vicinity of energy transmitting coil will inspire the high-frequency alternating magnetic field with same frequency, makes to be in
The pick-up winding of the energy pickup end in this magnetic field induces high-frequency electrical kinetic potential, after through Technics of Power Electronic Conversion
After be directly output to by electric loading, thus realize being wirelessly transferred of electric energy.
The radio energy transmission system of magnetic field coupled modes is straight owing to not having between transmitting coil and pick-up winding
The electrical contact connecing, and have the air gap of a cm level, this makes excitatory magnetic field have certain opening,
When there being illegal load to enter this alternating magnetic field space, then can cause the waste of energy or stolen, give wireless
Electric energy transmission brings potential safety hazard: as magnetic conductive metal thing enters alternating magnetic field space, then can produce because of electromagnetic induction
Raw eddy current, and simultaneously with serious heating, cause the waste of energy；Such as the stealing load with pick-up winding
Enter alternating magnetic field space, then can cause the stolen of energy.Therefore, it is necessary to the load to ICPT system is closed
Method differentiates.
At present, ICPT system is mainly completed to load legitimacy by REID (RFID)
Judging, RFID identification system is mainly made up of reader and electronic tag, when the energy with electronic tag picks up
When taking the radio-frequency antenna working region that end enters energy transmitting terminal, the radio-frequency antenna of transmitting terminal receives from electronics
Label sends the carrier signal of coming, and is sent to reader through antenna adjustments device, and the signal receiving is entered by reader
Deliver to the master controller of energy transmitting terminal after row demodulation and decoding, come according to electronic tag data by master controller
Judge the legitimacy of load.When only recognizing legal load, master controller just makes energy transmitting terminal just enter
Energy is radioed to load, otherwise refuses to Load transportation electric energy by often work.
Visible, RFID remained capacity technological essence is the radiofrequency signal based on certain frequency carries out signal biography
Defeated, due to the existence of magnetic energy converting machine structure and high-frequency electrical energy inverter in ICPT system, RFID radiofrequency signal
It is vulnerable to the interference of electromagnetic field of high frequency during being wirelessly transferred of energy, it is possible to can cause misreading erroneous judgement,
Reduce the degree of accuracy of illegal remained capacity.In addition, RFID remained capacity technology need increase electronic tag and
Power supply, reader, radio-frequency antenna, too increase the cost of whole system, reduces the reliability of system.
Content of the invention
It is an object of the invention to provide the load validity decision side of a kind of induction type radio energy transmission system
Method, the method can more accurately and reliably differentiate the legitimacy of load, and not increase new hardware, it determines become
This is low, it is easy to implement.
The present invention realizes that its goal of the invention be employed technical scheme comprise that, a kind of induction type wireless power transmission system
The load validity decision method of system, the steps include:
Energy transmitting terminal
A1, energy transmitting terminal inject small high-frequency ac by controller control inverter circuit to transmitting coil
Electricity, produces faint excitatory magnetic field；And detection in real time, record transmitting coil electric current, by transmitting coil electric current
Peak point connects, and obtains the envelope for reflecting transmitting coil current magnitude variation, demodulates from envelope
Go out low frequency signal, then low frequency signal be converted to pulse train, and carry out mating checking with its built-in key,
If being verified, it is determined that the load of energy pickup end is legal, carries out the operation of A2 step；Otherwise repeat with
Upper operation.
A2, energy transmitting terminal inject specified high-frequency ac by controller control inverter circuit to transmitting coil
Electricity, radio energy transmission system enters normal biography can duty.
Energy picks up end
B, pick-up winding induce electromotive force under the faint excitatory magnetic field effect of energy transmitting terminal transmitting coil,
After rectified circuit rectifies to BOOST DC transfer circuit provide electric energy, when pick-up winding induce electronic
When gesture is less than the threshold value setting, the controller control BOOST DC transfer circuit of energy pickup end is operated in low
Frequently mode, and using the pulse train containing checking information as the switch control rule of BOOST DC transfer circuit letter
Number, make the amplitude of pick-up winding electric current that corresponding change to occur, and be coupled to the transmitting coil of energy transmitting terminal
On；
When the electromotive force that pick-up winding induces exceedes the threshold value of setting, the controller control of energy pickup end
BOOST DC transfer circuit is switched to high frequency mode, and energy pickup end enters normal interrogation energy state.
The present invention it is critical only that:
The BOOST DC transfer circuit of wireless energy transfer system is in high frequency mould under conventional operation state
Formula, by changing the dutycycle i.e. size of adjustable output power of switching signal, when dutycycle one timing,
The amplitude of transmitting coil electric current is almost unchanged, but this pattern is difficult to verify that signal loading on it and detects
Come.
Therefore, before load legitimate verification passes through, set BOOST DC transfer circuit and be operated in low frequency
Under pattern, the switching frequency of BOOST DC transfer circuit well below system oscillation frequency, its operation principle
Vary considerably with traditional pattern: when the power switch pipe Guan Bi in BOOST DC transfer circuit, substantially
It is that from the decoupling of energy transmitting terminal circuit, through-put power is zero by the short circuit of pickup resonance circuit, transmitting coil electricity
The amplitude of stream is gradually increased with it；After power switch pipe disconnects, system re-establishes flux coupled relation,
Energy pickup end work, the amplitude of transmitting coil electric current is also gradually reduced therewith.Thus at transmitting coil electric current
Amplitude change on show as envelope form, the frequency of this envelope is exactly BOOST DC transfer circuit
Switching frequency.Thus energy pickup side controller is opened by checking signal control power switch pipe and is closed
Disconnected, checking signal can be loaded with envelope form and be transferred on transmitting coil electric current, then be sent out by energy
Penetrate the envelope detection of end, it is possible to demodulate the load checking signal sending from energy pickup end.
Compared with prior art, the invention has the beneficial effects as follows:
First, load checking signal is carried in energy-transmission channel with the linear formula of energy envelope, is not easily susceptible to electricity
Magnetic disturbance, it is ensured that the reliability of signal transmission, it is thus possible to the more accurately and reliably legitimacy to load
Judge.
2nd, energy transmitting terminal and the energy pickup existing controller of end, transmitting are directly utilized by software algorithm
Coil, pick-up winding, BOOST DC transfer circuit etc. produce, send and identify load checking signal (energy
Amount pickup end is also without the power supply increasing checking, and its electric energy is carried by the faint excitatory magnetic field of energy transmitting terminal
For), complete the judgement to load legitimacy.And without increasing extra radio communication and signal modulation etc.
Device, the hardware cost of remained capacity is zero, it is easy to accomplish.
The present invention is described in further detail with detailed description of the invention below in conjunction with the accompanying drawings.
Brief description
Fig. 1 is the BOOST DC transfer circuit of the embodiment of the present invention (low frequency work when proof load legitimacy
Operation mode) transmitting coil current waveform.
Fig. 2 is that the BOOST DC transfer circuit of the embodiment of the present invention is at normal mode of operation (high-frequency work mould
Formula) under transmitting coil current waveform.
Detailed description of the invention
Embodiment
A kind of detailed description of the invention of the present invention is, the load of a kind of induction type radio energy transmission system is legal
Sex determination method, the steps include:
Energy transmitting terminal
A1, energy transmitting terminal inject small high-frequency ac by controller control inverter circuit to transmitting coil
Electricity, produces faint excitatory magnetic field；And detection in real time, record transmitting coil electric current, by transmitting coil electric current
Peak point connects, and obtains the envelope for reflecting transmitting coil current magnitude variation, demodulates from envelope
Go out low frequency signal, then low frequency signal be converted to pulse train, and carry out mating checking with its built-in key,
If being verified, it is determined that the load of energy pickup end is legal, carries out the operation of A2 step；Otherwise repeat with
Upper operation.
A2, energy transmitting terminal inject specified high-frequency ac by controller control inverter circuit to transmitting coil
Electricity, radio energy transmission system enters normal biography can duty.
Energy picks up end
B, pick-up winding induce electromotive force under the faint excitatory magnetic field effect of energy transmitting terminal transmitting coil,
After rectified circuit rectifies to BOOST DC transfer circuit provide electric energy, when pick-up winding induce electronic
When gesture is less than the threshold value setting, the controller control BOOST DC transfer circuit of energy pickup end is operated in low
Frequently mode, and using the pulse train containing checking information as the switch control rule of BOOST DC transfer circuit letter
Number, make the amplitude of pick-up winding electric current that corresponding change to occur, and be coupled to the transmitting coil of energy transmitting terminal
On；
When the electromotive force that pick-up winding induces exceedes the threshold value of setting, the controller control of energy pickup end
BOOST DC transfer circuit is switched to high frequency mode, and energy pickup end enters normal interrogation energy state.
Fig. 1 and Fig. 2 can explain the operation principle of the present invention more intuitively.
Fig. 1 shows that BOOST DC transfer circuit is verified under duty (low frequency operating mode) in load,
Transmitting coil electric current shows as lower-frequency envelope line characteristic, the frequency of envelope and the square-wave signal (BOOST in figure
The switching signal of DC transfer circuit) frequency keep consistent, the controller of energy transmitting terminal is through to envelope
The demodulation of line signal, the switching signal of the BOOST DC transfer circuit that can obtain energy pickup end i.e. loads
Checking information, thus realize the identification to system load legitimacy.When checking is obstructed out-of-date, system cannot be entered
Enter normal operating conditions, be effectively prevented from illegally loading energy dissipation or the various peace that entrance excitatory magnetic field causes
Full hidden danger.
Fig. 2 shows that BOOST DC transfer circuit, under normal operating conditions (high-frequency work pattern), is launched
The amplitude of the coil current switching signal of BOOST direct current varying circuit (square-wave signal in figure be) almost without
Change, is formed without the energy envelope line being associated with square-wave signal in figure, does not comprise also to be not easy to comprise to appoint
What his information.
Claims (1)
1. a load validity decision method for induction type radio energy transmission system, the steps include:
Energy transmitting terminal
A1, energy transmitting terminal inject small high-frequency ac by controller control inverter circuit to transmitting coil
Electricity, produces faint excitatory magnetic field；And detection in real time, record transmitting coil electric current, by transmitting coil electric current
Peak point connects, and obtains the envelope for reflecting transmitting coil current magnitude variation, demodulates from envelope
Go out low frequency signal, then low frequency signal be converted to pulse train, and carry out mating checking with its built-in key,
If being verified, it is determined that the load of energy pickup end is legal, carries out the operation of A2 step；Otherwise repeat with
Upper operation；
A2, energy transmitting terminal inject specified high-frequency ac by controller control inverter circuit to transmitting coil
Electricity, radio energy transmission system enters normal biography can duty；
Energy picks up end
B, pick-up winding induce electromotive force under the faint excitatory magnetic field effect of energy transmitting terminal transmitting coil,
After rectified circuit rectifies to BOOST DC transfer circuit provide electric energy, when pick-up winding induce electronic
When gesture is less than the threshold value setting, the controller control BOOST DC transfer circuit of energy pickup end is operated in low
Frequently mode, and using the pulse train containing checking information as the switch control rule of BOOST DC transfer circuit letter
Number, make the amplitude of pick-up winding electric current that corresponding change to occur, and be coupled to the transmitting coil of energy transmitting terminal
On；
When the electromotive force that pick-up winding induces exceedes the threshold value of setting, the controller control of energy pickup end
BOOST DC transfer circuit is switched to high frequency mode, and energy pickup end enters normal interrogation energy state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310596823.0A CN103795154B (en) | 2013-11-22 | 2013-11-22 | A kind of load validity decision method of induction type radio energy transmission system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310596823.0A CN103795154B (en) | 2013-11-22 | 2013-11-22 | A kind of load validity decision method of induction type radio energy transmission system |
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| CN103795154A CN103795154A (en) | 2014-05-14 |
| CN103795154B true CN103795154B (en) | 2016-11-09 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106451818B (en) * | 2016-10-25 | 2018-12-11 | 哈尔滨工业大学 | Hub motor wireless power supply system based on magnetic coupling resonance |
| US11787296B2 (en) | 2018-05-24 | 2023-10-17 | ABB E-mobility B.V. | Method for pairing electric vehicles and power terminals in a power station for electric vehicles |
| CN110829618A (en) * | 2019-10-22 | 2020-02-21 | 国网江西省电力有限公司电力科学研究院 | Directional transmission system of multi-load wireless power transmission system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102239619A (en) * | 2008-10-03 | 2011-11-09 | 捷通国际有限公司 | Power system |
| CN103094996A (en) * | 2013-01-10 | 2013-05-08 | 李鹏 | Wireless power transmission system and realizing method thereof |
| CN103178621A (en) * | 2011-12-19 | 2013-06-26 | 鸿富锦精密工业（深圳）有限公司 | Wireless power supply device and power supply method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006191276A (en) * | 2005-01-05 | 2006-07-20 | Ooita Ken | Transmitting device for electric power and information by proximity magnetic field coupling |
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2013
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102239619A (en) * | 2008-10-03 | 2011-11-09 | 捷通国际有限公司 | Power system |
| CN103178621A (en) * | 2011-12-19 | 2013-06-26 | 鸿富锦精密工业（深圳）有限公司 | Wireless power supply device and power supply method |
| CN103094996A (en) * | 2013-01-10 | 2013-05-08 | 李鹏 | Wireless power transmission system and realizing method thereof |
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Effective date of registration: 20180817 Address after: 610097 No. 1, unit 2, Tong Yuan Garden, 836 Xipu campus road, PI Du District, Chengdu, Sichuan, 04 Co-patentee after: CHENGDU GUOJIA ELECTRICAL ENGINEERING CO., LTD. Patentee after: He Zhengyou Address before: 610031 No. two, section 111, ring road, Chengdu, Sichuan, China Patentee before: Southwest Jiaotong University |
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Effective date of registration: 20210414 Address after: No.8, unit 1, building 15, no.111-40, Section 1, 2nd Ring Road North, Jinniu District, Chengdu, Sichuan 610000 Patentee after: He Zhengyou Patentee after: CHENGDU GUOJIA ELECTRICAL ENGINEERING Co.,Ltd. Patentee after: Li Yong Address before: 610097 No. 1, unit 2, Tong Yuan Garden, 836 Xipu campus road, PI Du District, Chengdu, Sichuan, 04 Patentee before: He Zhengyou Patentee before: CHENGDU GUOJIA ELECTRICAL ENGINEERING Co.,Ltd. |
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Effective date of registration: 20210429 Address after: No.1, 6th floor, building 1, 88 Tianchen Road, high tech Zone, Chengdu, Sichuan 610000 Patentee after: Chengdu aitneng Electric Technology Co.,Ltd. Address before: No.8, unit 1, building 15, no.111-40, Section 1, 2nd Ring Road North, Jinniu District, Chengdu, Sichuan 610000 Patentee before: He Zhengyou Patentee before: CHENGDU GUOJIA ELECTRICAL ENGINEERING Co.,Ltd. Patentee before: Li Yong |