CN103151853A - Wireless power transmission impedance automatic matching device - Google Patents
Wireless power transmission impedance automatic matching device Download PDFInfo
- Publication number
- CN103151853A CN103151853A CN2013101134441A CN201310113444A CN103151853A CN 103151853 A CN103151853 A CN 103151853A CN 2013101134441 A CN2013101134441 A CN 2013101134441A CN 201310113444 A CN201310113444 A CN 201310113444A CN 103151853 A CN103151853 A CN 103151853A
- Authority
- CN
- China
- Prior art keywords
- electric capacity
- contactor
- inductance
- power transmission
- impedance
- 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
Links
Images
Abstract
The invention discloses a wireless power transmission impedance automatic matching device. The device mainly comprises a digital signal processing (DSP) control system, a contactor array controller, a stepping motor, a driving system of the stepping motor, an impedance adjusting system, a reflection coefficient detecting system, a capacitance position detecting system and the like. The system belongs to fields of a high-frequency electromagnetic theory and the frontier domain of the control engineering application of the theory; the influence of different impedances on power wireless transmission power and efficiency is prevented; and the whole performance of power transmission is improved. The invention does not only provide the impedance matching device which is wide in frequency band, intelligent and high in reliability and improves the intelligent level of conventional matching, but also provides the impedance adjusting system applicable to power transmission aiming at the characteristics of wireless power transmission for the first time.
Description
Technical field
The present invention relates to a kind of wireless power transmission impedance automatic matching device.Particularly relate to a kind of a kind of wireless power transmission impedance automatic matching device with broadband, intellectuality, high reliability.
Background technology
Found to utilize since 1840 electromagnetic induction phenomenon and wire can electric energy transmitting so far, the transmission of electric energy mainly by wire directly contact transmits.The charging of electrical equipment is generally to be undertaken by plug and socket, but when carrying out high-power charging, the danger that this charging modes exists high pressure to get an electric shock.And owing to there being friction and wear, Security of the system, reliability and useful life are lower, particularly in some inflammable, explosive fields such as chemical industry, mining, very easily cause large accident.New contactless electrical energy transmission system adopts electromagnetic induction principle, power electronic technology and control theory to combine, and has realized the wireless transmission of electric energy, has overcome above restriction fully.
According to the delivery of electrical energy principle, wireless power transmission can be divided three classes haply: the first kind is the direct coupling type of transformer principle, although this mode power is larger, only is suitable for closely; Equations of The Second Kind electric wave wireless energy transmission technology, directly utilize the electromagnetic wave energy can be by the principle of antenna transmission and reception, although this mode has realized the transmission of long distance and high-power energy, but the Energy Transfer recipient is to restriction, can not the cut-through thing, and loss is larger, and human body and other biology are had grievous injury; The 3rd class is non-radiation coupling resonance manner, and this technology can be in the situation that there be barrier to transmit, and transmission range is also distant, and through-put power is also larger, and to not injury of human body.
In sum, the third delivery of electrical energy mode has very large potentiality to be exploited, and its appearance has further enlarged application target and the field of wireless power transmission technology.Undoubtedly, this biography can pattern will become new developing direction of wireless power transmission.The research of magnet coupled resonant type electric energy transmission technology at present still is in the starting stage, mainly concentrates on raising and the application of special occasions research of systematic function.
According to the radio frequency maximum power transfer theorem as can be known: when load impedance equaled the complex conjugate of source impedance, the power that is transferred to load was maximum, so load impedance is very large on the impact of radio frequency power stage.When load is not mated, can produce power reflection, not only increasing power loss, and might burn radio frequency source or make transmission line produce dielectric breakdown, therefore most important in high-power wireless electric energy transmission system middle impedance coupling, namely add an impedance automatic matching device (passive network) and realize that load impedance changes automatically between high frequency electric source and Electro-magnetic Launcher System, to reach best through-put power and efficient.
The present invention is intended to overcome the impedance difference to the impact of electric energy wireless transmission power efficiency, improves the delivery of electrical energy performance, has designed a kind of a kind of wireless power transmission impedance automatic matching device with broadband, intellectuality, high reliability.
Summary of the invention
Technical problem to be solved by this invention is, proposed a kind of wireless power transmission impedance automatic matching device, and this device has the characteristics of broadband, intellectuality, high reliability.
the technical solution adopted in the present invention is: a kind of wireless power transmission impedance automatic matching device, comprise the DSP control system, it is the key control unit of apparatus of the present invention, it is characterized in that, also be provided with: the contactor array control unit is used for sending opening of signal controlling contactor and state according to the DSP control system, stepping motor and drive system thereof are used for regulating the appearance value size of tunable capacitor, the impedance adjustment system is by changing inductance, capacitance size is completed the part of impedance adjustment, thereby the reflection coefficient detection system calculates reflection coefficient according to detecting forward voltage and emitting voltage size, the electric capacity position detecting system is for detection of the position of variable capacitance sheet.
Described DSP control system is one of core of wireless power transmission impedance automatic matching device, comprises input circuit, DSP minimum system and output circuit etc.Forward voltage and the reverse voltage that detects from the reflection coefficient detection system and deliver to dsp chip by input circuit by the capacitance sheet position signalling that the electric capacity position detecting system detects, dsp chip calculates the state of a control of electric capacity position and contactor array control unit according to these information and sends the numerical values recited that inductance, electric capacity on off operating mode and tunable capacitor, inductance are regulated in corresponding order.
Described contactor array control unit can receive the order that the DSP control system is sent, and changes the on off operating mode of electric capacity, inductance according to this signal.
In described stepping motor and drive system thereof, driving system of stepping motor receives the order of DSP control system and also this order is converted to the electric impulse signal of control step motor winding break-make.
Described impedance adjustment system is made of 2 groups of capacitances and 1 group of inductance value.Every group of electric capacity is decided electric capacity by 1 tunable capacitor and 3 controlled also fixeds of break-make and is formed, and stepping motor rotates the numerical values recited that can change tunable capacitor, increases and decreases and connect electric capacity by the contactor break-make to change whole group of capacitance values.Whole group of inductance is by 2 inductance in parallels, and one of them break-make is controlled, changes whole group of inductance numerical values recited by changing controlled inductance.
Described reflection coefficient detection system is comprised of directional coupler, analog filter, isolated amplifier and AD conversion and digital filter.Directional coupler is taken a sample to the voltage of forward and reverse transmission on transmission line respectively, the incoming signal that obtains separating and reflected signal; Then filter high-frequency signal by analog filter; Then by isolated amplifier, signal is isolated respectively and amplified; Carry out at last AD conversion and digital filtering and final result is transported to the DSP control system.
Described electric capacity position detecting system is comprised of potentiometer and simulation follower.According to linear between the appearance value of electric capacity and position, the moving plate of electric capacity is connected with rotational potentiometer by gear.The electric capacity position changes signal and is reflected on potentiometer, can obtain the turned position of electric capacity by the voltage on the collection potentiometer.
A kind of wireless power transmission impedance automatic matching device of the present invention, this device has high robust, high reliability, intelligentized characteristics.After system's energising work, wireless power transmission impedance automatic matching device Real-time Collection reflection coefficient, the automatic control of carrying out impedance when reflection coefficient during higher than set point is regulated, coupling, so repeatedly carries out, until reflection coefficient is less than setting.Avoid excessive through-put power and the efficient of affecting of reflection power but add the proof load of impedance automatic matching device to reach real-time matching in radio energy transmission system, even burn radio-frequency (RF) power amplification.
Description of drawings
Fig. 1 is the entire block diagram of design system;
Fig. 2 is the impedance adjustment systematic schematic diagram;
Fig. 3 is reflection coefficient detection system block diagram.
Embodiment
The invention provides a kind of a kind of wireless power transmission impedance automatic matching device with broadband, intellectuality, high reliability.Below in conjunction with embodiment and accompanying drawing, a kind of wireless power transmission impedance automatic matching device of the present invention is made a detailed description.Impedance adjustment systematic reflection coefficient detecting system
as shown in Figure 1, a kind of wireless power transmission impedance automatic matching device of the present invention, include DSP control system 1 and can receive the reflection case that reflection coefficient detection system 5 signals obtain radio-frequency voltage, then according to the electric capacity position signalling Driving Stepping Motor of electric capacity position detecting system 6 and drive system thereof 3 control capacittance positions, calculate simultaneously the state of a control of contactor array control unit, it is characterized in that, also be provided with: contactor array control unit 2 is regulated capacitance switch state in impedance adjustment system 4 according to the control signal of DSP control system 1, stepping motor and drive system thereof 3 is used for the control step electric machine rotation with the position of the variable capacitance of regulating impedance adjustment system 4, impedance adjustment system 4 can be by the number in parallel of capacitor and inductor or the regulating load resistance value of tunable capacitor, reflection coefficient detection system 5 received RF forward voltages and reflected voltage also calculate reflection coefficient thus, electric capacity position detecting system 6 can detect the position of tunable capacitor in impedance adjustment system 4.
As shown in Figure 2, described impedance adjustment system 4 is made of two groups of capacitances and one group of inductance value.Variable capacitance C1 is connected with two stepping motors respectively with C5, thereby the stepping motor rotation can drive the variation of capacitance sheet relative position, capacitance is changed.Capacitor C 2, C3, C4, C6, C7, C8 and inductance L 2 are controlled its break-make by K1, K2, K3, K4, K5, K6, K7 contactor respectively.When load resistance R1 changed, at first the change of contactor state made electric capacity and inductance concern that due in parallel its value changes, and then finely tunes the further fine tuning electric capacity of variable capacitance and inductance numerical value, finally reaches the coupling of impedance.
As shown in Figure 3, described reflection coefficient detection system 5 is comprised of directional coupler 51, analog filter 52, isolated amplifier 53 and AD conversion and digital filter 54.Directional coupler 51 is taken a sample to the voltage of forward and reverse transmission on transmission line respectively, the incoming signal that obtains separating and reflected signal; Then filter high-frequency signal by analog filter 52; Then by isolated amplifier 53, signal is isolated respectively and amplified; Carry out at last AD conversion and digital filtering and final result is transported to the DSP control system.
Below schematically the present invention and execution mode thereof are described, this description does not have limitation, and shown in accompanying drawing is also one of embodiments of the present invention.So if those of ordinary skill in the art is enlightened by it; in the situation that do not break away from the invention aim; adopt the same base part of other form or each component layouts mode of other form; without the creationary technical scheme similar to this technical scheme and the embodiment of designing, all should belong to protection scope of the present invention.
Claims (3)
1. wireless power transmission impedance automatic matching device, comprise DSP control system (1), it is characterized in that, also be provided with: contactor array control unit (2) is connected with impedance adjustment system (4) with DSP control system (1), stepping motor and drive system thereof (3) are connected with impedance adjustment system (4) with DSP control system (1), be used for regulating inductance, capacitance size is completed impedance adjustment, reflection coefficient detection system (5) is connected with impedance adjustment system (4) with DSP control system (1), detect forward voltage and emitting voltage size, electric capacity position detecting system (6) is connected with impedance adjustment system (4) with DSP control system (1), position for detection of the variable capacitance sheet.
2. a kind of wireless power transmission impedance automatic matching device according to claim 1, it is characterized in that the inductive bank that described impedance adjustment system (4) comprises the capacitance group 1 that is comprised of electric capacity (C1), electric capacity (C2), electric capacity (C3) and electric capacity (C4) and the capacitance group 2 that is comprised of electric capacity (C5), electric capacity (C6), electric capacity (C7) and electric capacity (C8) and inductance (L1) and inductance (L1) form; Electric capacity (C2), electric capacity (C3) and electric capacity (C4) are controlled its break-make by contactor (K1), contactor (K2), contactor (K3) respectively, and capacitance group 1 shunt capacitance what and tunable capacitor (C1) be the appearance value of control capacittance group 1 jointly; Electric capacity (C6), electric capacity (C7) and electric capacity (C8) are controlled its break-make by contactor (K4), contactor (K5), contactor (K6) respectively, and capacitance group 2 shunt capacitances what and tunable capacitor (C5) be the appearance value of control capacittance group 2 jointly; Inductance (L2) and inductance (L1) are connected K7 with contactor) be connected, contactor (K7) is controlled inductance (L2) break-make and is determined whether inductance (L2) is in parallel with inductance (L1).
3. a kind of wireless power transmission impedance automatic matching device according to claim 1, it is characterized in that, described reflection coefficient detection system (5) is comprised of directional coupler (51), analog filter (52), isolated amplifier (53) and AD conversion and digital filter (54); Directional coupler (51) is connected with impedance adjustment system (4), can take a sample to the voltage of forward and reverse transmission on transmission line; Analog filter (52) be connected with isolated amplifier (53) by directional coupler (51), be used for filtering high-frequency signal; Conversion is connected with digital filter (54) with AD for isolated amplifier (53) and analog filter (52), the output signal of analog filter (52) is isolated respectively and amplify after deliver to AD and change and digital filter (54); The AD conversion is connected with isolated amplifier (53) with digital filter (54).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101134441A CN103151853A (en) | 2013-04-03 | 2013-04-03 | Wireless power transmission impedance automatic matching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101134441A CN103151853A (en) | 2013-04-03 | 2013-04-03 | Wireless power transmission impedance automatic matching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103151853A true CN103151853A (en) | 2013-06-12 |
Family
ID=48549783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101134441A Pending CN103151853A (en) | 2013-04-03 | 2013-04-03 | Wireless power transmission impedance automatic matching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103151853A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852476A (en) * | 2015-05-28 | 2015-08-19 | 天津工业大学 | Dynamic load coupling circuit |
| CN106560976A (en) * | 2016-06-27 | 2017-04-12 | 中兴新能源汽车有限责任公司 | Wireless charging transmitting system and wireless charging receiving system |
| CN111682655A (en) * | 2020-05-17 | 2020-09-18 | 上海电机学院 | Dynamic impedance matching system and method for wireless power transmission system |
| CN114265334A (en) * | 2020-09-16 | 2022-04-01 | 深圳鼎信通达股份有限公司 | Automatic simulation loop impedance matching detection method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63258110A (en) * | 1987-04-15 | 1988-10-25 | Seiko Epson Corp | Impedance matching device for high frequency plasma generator |
| US20040137865A1 (en) * | 2003-01-09 | 2004-07-15 | Francois Callias | Method and integrated circuit for tuning an LC resonator and electrical apparatus comprising an LC resonator |
| CN101437353A (en) * | 2007-11-15 | 2009-05-20 | 北京北方微电子基地设备工艺研究中心有限责任公司 | Matcher and matching method thereof |
| CN201387563Y (en) * | 2009-04-10 | 2010-01-20 | 中国地质大学（武汉） | Radio frequency impedance matching device |
| CN102479657A (en) * | 2010-11-26 | 2012-05-30 | 沈阳拓荆科技有限公司 | Multi-sectional matcher |
| CN102725940A (en) * | 2010-01-26 | 2012-10-10 | 爱考斯研究株式会社 | Non-contact power transmission system and non-contact power transmission apparatus |
| WO2012172410A1 (en) * | 2011-06-17 | 2012-12-20 | Toyota Jidosha Kabushiki Kaisha | Power transmitting device, power receiving device, vehicle, and contactless power supply system and control method for contactless power supply system |
| CN203205990U (en) * | 2013-04-03 | 2013-09-18 | 天津工业大学 | Wireless power transmission impedance automatic matching apparatus |
-
2013
- 2013-04-03 CN CN2013101134441A patent/CN103151853A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63258110A (en) * | 1987-04-15 | 1988-10-25 | Seiko Epson Corp | Impedance matching device for high frequency plasma generator |
| US20040137865A1 (en) * | 2003-01-09 | 2004-07-15 | Francois Callias | Method and integrated circuit for tuning an LC resonator and electrical apparatus comprising an LC resonator |
| CN101437353A (en) * | 2007-11-15 | 2009-05-20 | 北京北方微电子基地设备工艺研究中心有限责任公司 | Matcher and matching method thereof |
| CN201387563Y (en) * | 2009-04-10 | 2010-01-20 | 中国地质大学（武汉） | Radio frequency impedance matching device |
| CN102725940A (en) * | 2010-01-26 | 2012-10-10 | 爱考斯研究株式会社 | Non-contact power transmission system and non-contact power transmission apparatus |
| CN102479657A (en) * | 2010-11-26 | 2012-05-30 | 沈阳拓荆科技有限公司 | Multi-sectional matcher |
| WO2012172410A1 (en) * | 2011-06-17 | 2012-12-20 | Toyota Jidosha Kabushiki Kaisha | Power transmitting device, power receiving device, vehicle, and contactless power supply system and control method for contactless power supply system |
| CN203205990U (en) * | 2013-04-03 | 2013-09-18 | 天津工业大学 | Wireless power transmission impedance automatic matching apparatus |
Non-Patent Citations (2)
| Title |
|---|
| 刘东宇: ""自动阻抗匹配器检测电路设计及匹配算法研究"", 《中国优秀硕士学位论文全文数据库（信息科技辑）》 * |
| 钱玉良: ""自动阻抗匹配器驱动程序设计及匹配算法研究"", 《中国优秀硕士学位论文全文数据库（信息科技辑）》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852476A (en) * | 2015-05-28 | 2015-08-19 | 天津工业大学 | Dynamic load coupling circuit |
| CN106560976A (en) * | 2016-06-27 | 2017-04-12 | 中兴新能源汽车有限责任公司 | Wireless charging transmitting system and wireless charging receiving system |
| CN106560976B (en) * | 2016-06-27 | 2023-09-01 | 中兴新能源汽车有限责任公司 | Wireless charging transmitting system and wireless charging receiving system |
| CN111682655A (en) * | 2020-05-17 | 2020-09-18 | 上海电机学院 | Dynamic impedance matching system and method for wireless power transmission system |
| CN114265334A (en) * | 2020-09-16 | 2022-04-01 | 深圳鼎信通达股份有限公司 | Automatic simulation loop impedance matching detection method |
| CN114265334B (en) * | 2020-09-16 | 2024-04-09 | 深圳鼎信通达股份有限公司 | Automatic analog loop impedance matching detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103733531B (en) | Dynamic resonance match circuit for wireless power receptor | |
| US20100052431A1 (en) | Non-contact power transmission device | |
| JP5798474B2 (en) | Driving method of power feeding device | |
| CN102882286B (en) | Electric field coupling-based wireless power transmission system | |
| CN107482794B (en) | Method for designing variable-diameter coil for wireless power transmission | |
| CN105226839A (en) | Magnet coupled resonant type wireless electric energy transmission system and bilateral self-tuning method thereof | |
| CN101964678A (en) | Non-contact power and be subjected to electrical communication equipment, power and be subjected to the telecommunication control method | |
| KR20120020809A (en) | Apparatus for adaptive resonant power transmission | |
| CN103151853A (en) | Wireless power transmission impedance automatic matching device | |
| CN103686533A (en) | System and method for transmitting a radio frequency signal through a speaker coil | |
| CN103151852A (en) | Novel magnetic coupling resonant wireless electric energy transmission device | |
| CN102664601A (en) | Self-adapting impedance matching module | |
| CN203205990U (en) | Wireless power transmission impedance automatic matching apparatus | |
| WO2015099065A1 (en) | Non-contact power reception circuit, non-contact power reception apparatus, and non-contact power transmission/reception apparatus | |
| CN104993235A (en) | Antenna apparatus and electronic equipment | |
| US20170133885A1 (en) | Notch filter utilized for near field communication and wireless power transfer dual mode antennas | |
| CN207339849U (en) | A kind of small energy and signal wireless transmission system of the work of short distance multiband | |
| CN205828121U (en) | A kind of controllable impedance device and wireless energy transfer system thereof | |
| CN107425884A (en) | A kind of electric energy of sharing channel and electromagnetic signal short range wireless transmission system | |
| CN106816966A (en) | Wireless charging and NFC twin coils coexist circuit | |
| WO2022096407A1 (en) | A coil structure for impedance matching in a wireless power transfer system | |
| KR102272354B1 (en) | Apparatus for wireless power transmission | |
| CN111162814B (en) | Impedance adjuster, radio frequency circuit and electronic equipment | |
| KR101444746B1 (en) | Apparatus for transmitting magnetic resonance power | |
| KR101946848B1 (en) | Wireless power receiver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130612 |
|
| RJ01 | Rejection of invention patent application after publication |