CN104135086A - Resonant wireless energy transfer device - Google Patents
Resonant wireless energy transfer device Download PDFInfo
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- CN104135086A CN104135086A CN201410364164.2A CN201410364164A CN104135086A CN 104135086 A CN104135086 A CN 104135086A CN 201410364164 A CN201410364164 A CN 201410364164A CN 104135086 A CN104135086 A CN 104135086A
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Abstract
The invention discloses a resonant wireless energy transfer device which consists of a transmitting terminal (2), a receiving terminal (3), a transmitting terminal power supply conditioning module (9) and a receiving terminal power supply conditioning module (4). A power supply coil, a transmitting coil, a load coil and a receiving coil are formed by series connection or parallel connection of capacitors and inductance coils, and formed circuits have the same resonant frequency. The capacitors are voltage-controlled adjustable capacitors. The capacitors are controlled by voltages, with opposite polarities and the same amplitude, output by corresponding capacitance self-adaptive adjustment modules, and the capacitance self-adaptive adjustment modules consist of current sensors and processing modules. When inductance of the transmitting coil, the power supply coil, the receiving coil and the load coil is changed due to changes of external conditions, the device can automatically adjust capacitance of a resonance circuit and restores the resonant frequency to supply frequency.
Description
Technical field
The present invention relates to a kind of wireless energy transfer system, particularly a kind of self adaptation regulates the transmitting device of resonance frequency.
Background technology
Non-radiative type magnetic coupling resonance is a kind of novel wireless energy transmission technology, and it produces very strong coupling based on two resonant bodies with same frequency, and only has this principle of very weak coupling to carry out transferring energy to the object of disresonance frequence around.Magnetic coupling resonator system is generally two coil systems and comprises generation resonance coil, receives resonance coil and load; Also there are four coil systems to comprise power coil, coil, receiving coil and loading coil occur.This technology has the seminar of Massachusetts Polytechnics (MIT) to find the earliest, can realize the transmission of medium and long distance (being that transmission range is several times of transmitting coil size), and still can obtain higher efficiency and larger power, have good application prospect in a lot of industries.But this technology also exists some problems as the sensitiveness of system parameters, in the time that in system, a certain partial parameters changes, the transmission characteristic of system can great changes will take place.Therefore as by this technology be used for the occasion that switch cubicle, transformer etc. contain a large amount of electric conductors, magnetic conductor, need to solve it and easily be disturbed and the problem of off-resonance point.
In patent CN201310035764.x and CN201310061424.4, by adopting a transmitting terminal, the mode of multiple receiving terminals improves overall transmission efficiency, but does not mention for noisy situation.
The distance that document " Analysis, experimental results and range adaptation of magnetically coupled resonators for wireless power transfer " proposes by regulating power coil and transmitting coil regulates coupling coefficient and then guarantee system in maximum transmitted efficiency.Document " Automated frequency tracking system for efficient mid-range magnetic resonance wireless power transfer " proposes, by the mode of detection system efficiency of transmission, system power supply frequency is carried out to adaptive adjusting to make system in optimum transport efficiency point.Document " Fu Wenzhen etc., the research of frequency-tracking formula resonance coupling wireless electric energy transmission system " is mentioned by measuring electric current, adjusts supply frequency and makes the system being interfered again reach resonance condition.The method that above-mentioned document is mentioned has certain effect for the system being interfered, but the system that mode by changing supply frequency is only subject to same disturbance to transmitting terminal and receiving terminal produces effect, for transmitting terminal and the receiving terminal difference that is interfered, it is poor that resonance frequency becomes the situation effect of different frequencies, even there is no effect.
Patent CN201310208595.5 mentions a kind of wireless electric energy transmission device with anti-stealing electricity function, compares by comparing output power of power supply and bearing power, in the time finding that there is stealing, regulates supply frequency and resonator system frequency, and electricity theft prevention continues.It regulates resonance frequency to realize by control capacittance, but tunable capacitor used only has some fixing gear, object is in order initiatively to leave system under order primary frequency, can not solve the problem that the resonance frequency that causes because of interference departs from, and described mode needs emitting side to communicate by letter with receiver side, has increased system complexity.
Summary of the invention
The object of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of resonance vibration type wireless energy transform device regulating based on electric capacity self adaptation is provided.The present invention can solve because the problem that causes that resonance point departs from appears in the interference such as magnetic conduction, electric conducting material body, and implementation is easy, is disturbed the problem that degree is different has good effect for solution transmitting coil with receiving coil.
For realizing above-mentioned effect, wireless energy transform device structure of the present invention is as follows:
Wireless energy transform device of the present invention comprises: transmitting terminal, receiving terminal, transmitting terminal power supply conditioning module and receiving terminal power supply conditioning module.Transmitting terminal is made up of with corresponding electric capacity adaptive adjustment module power coil, or is jointly made up of power coil and transmitting coil and the electric capacity adaptive adjustment module corresponding with power coil and transmitting coil.Receiving terminal is made up of with corresponding electric capacity adaptive adjustment module loading coil, or is jointly made up of receiving coil and loading coil and the electric capacity adaptive adjustment module corresponding with receiving coil and loading coil.
One termination power frequency AC of described wireless energy transform device, another termination load.
When described transmitting terminal is only made up of with corresponding electric capacity adaptive adjustment module power coil, described power coil is made up of inductance coil and capacitor's series or parallel connection.When series connection, capacitor is connected with high-frequency ac power two ends respectively with the disjunct terminal of inductance coil, and time in parallel, high-frequency ac power two ends are connected with the two ends of capacitor respectively.The inductance value of described inductance coil is identical with high-frequency alternating current source frequency with the resonance frequency of capacitor.
When described receiving terminal is only made up of with corresponding electric capacity adaptive adjustment module loading coil, described loading coil is made up of inductance coil and capacitor's series or parallel connection.When series connection, capacitor is connected with the two ends of load respectively with the disjunct terminal of inductance coil, and time in parallel, load two ends are connected with the two ends of capacitor respectively.The resonance frequency of described inductance coil and capacitor is identical with the resonance frequency of power coil.
When described transmitting terminal is made up of a transmitting coil and a power coil and the electric capacity adaptive adjustment module corresponding with transmitting coil and power coil, the coiling side by side of transmitting coil and power coil, makes mutual inductance between the two large as far as possible.Power coil is made up of inductance coil and capacitor's series or parallel connection.The inductance value of the inductance coil in described power coil is identical with the frequency of high-frequency ac power with the resonance frequency of the capacitance of capacitor in power coil.Described transmitting coil also comprises inductance coil and capacitor, and this inductance coil is connected with capacitor's series short circuit, and the inductance value of this inductance coil is identical with the frequency of high-frequency ac power with the resonance frequency of capacitor electrode capacitance.
When described receiving terminal is made up of a receiving coil and a loading coil and the electric capacity adaptive adjustment module corresponding with receiving coil and loading coil, the coiling side by side of receiving coil and loading coil, makes mutual inductance between the two large as far as possible.Described loading coil is made up of inductance coil and capacitor's series or parallel connection.The inductance value of the inductance coil in described loading coil is identical with high-frequency alternating current source frequency with the resonance frequency of the capacitor electrode capacitance in loading coil.Described receiving coil comprises inductance coil and capacitor, and this inductance coil is connected with capacitor's series short circuit.The inductance value of this inductance coil is identical with high-frequency alternating current source frequency with the resonance frequency of capacitor electrode capacitance.
External industrial frequency AC or DC power supply are converted to two-way by described transmitting terminal power supply conditioning module, and a road is high-frequency ac power, is connected with the power coil of transmitting terminal; Another road is low-voltage direct, for the electric capacity adaptive adjustment module energy supply of transmitting terminal one side, is connected with the processing module of electric capacity adaptive adjustment module.
The high-frequency ac power receiving is converted to two-way by described receiving terminal power supply conditioning module, and a road, for load provides power supply, is connected with load resistance; Another road is low-voltage direct, for the electric capacity adaptive adjustment module energy supply of receiving terminal one side, is connected with the processing module of electric capacity adaptive adjustment module.
Described capacitor is the variable capacitor by the control of electric capacity adaptive adjustment module, has four terminals, and wherein two is AC terminal, and two other is voltage control binding post.Two voltage control terminal voltages are all 0 o'clock, and condenser capacitance is initial value; The voltage of two voltage control terminals is equal and opposite in direction, when opposite polarity certain magnitude of voltage, and the increase that capacitor electrode capacitance is corresponding or reduce.
Described electric capacity adaptive adjustment module comprises current sensor and two parts of processing module of being arranged on inductance or capacitor loop; Described current sensor is used for testing circuit current amplitude; Described processing module has a pair of power end, a pair of signal output part, a current signal input.The power end of described processing module obtains energy from transmitting terminal or receiving terminal, and arranges as the required amplitude power supply of processing module.The signal of the current signal input input current transducer output of described processing module, the current signal obtaining according to current sensor measurement, with set point relatively after, the signal output part of processing module is exported equal and opposite in direction, opposite polarity voltage signal according to comparative result, controls the capacitor of transmitting terminal and receiving terminal coil; Described processing module has feedback energy supply, can realize the accurate control to capacitor.The each free capacitance adaptive adjustment module of capacitor control in described transmitting coil, receiving coil, power coil, loading coil.
Be connected in parallel for transmitting coil or receiving coil employing, work in the device of parallel resonance mode, in the time that it is in running order, current transformer gathers the electric current in inductance coil loop the rated current comparison with this loop, when real-time current with the ratio of rated current lower than a certain set point, conventionally be set as 0.9, time, illustrate that the residing external environment of radio energy transmission system changes, the normally magnetic conduction of periphery, electric conducting material change, resonant inductance value changes, the adaptive adjustment module of electric capacity is triggered, processing module is by the electric capacity of Signal Regulation capacitor.Real-time current and rated current difference are larger, and output voltage is higher, and capacitance change is larger, make resonant circuit come back to resonance point.Conventionally extraneous interference is because newly occur that ferromagnetic material increases resonant inductance, therefore the voltage signal of exporting first control capacitor capacitance reduces, if can not make electric current increase by the mode reducing, regulate initial voltage that capacitor electrode capacitance is increased.Adopt and be connected in series for transmitting coil or receiving coil, apparatus of the present invention of work and series resonance mode, the adaptive adjustment module course of work is identical when being connected in parallel.
Described power coil, transmitting coil, receiving coil, loading coil independent regulation separately, is independent of each other.
Adopt aforesaid way to adopt the capacitor can self adaptation regulating to replace fixed capacitor can effectively reduce the variation of surrounding environment, increased ferromagnetic material as unexpected, electric conducting material etc., on the impact of wireless energy transfer system, implementation is relatively simple simultaneously, do not need transmitting terminal to communicate by letter with receiving terminal, reduced complexity and cost.
Brief description of the drawings
Fig. 1 is the schematic diagram of one embodiment of the present invention;
Fig. 2 is the schematic diagram of the second execution mode of the present invention;
Fig. 3 is the schematic diagram of the third execution mode of the present invention;
Fig. 4 is that power coil of the present invention and self adaptation regulate schematic diagram;
Fig. 5 is the variable capacitor schematic diagram that the present invention adopts.
Embodiment
Further illustrate the present invention below in conjunction with the drawings and specific embodiments.
Fig. 1 is the schematic diagram of one embodiment of the present invention.As shown in Figure 1, resonance type wireless transmitting device 1 of the present invention comprises transmitting terminal 2, receiving terminal 3, transmitting terminal voltage conditioning module 9 and receiving-end voltage conditioning module 4.One termination power frequency AC of described radio transmitting device 1, power frequency AC is connected with the input of transmitting terminal voltage conditioning module 9; The other end of described radio transmitting device 1 connects load 5 by receiving-end voltage conditioning module 4.Described transmitting terminal 2 is made up of jointly power coil and corresponding electric capacity adaptive adjustment module.Power coil is in series by the first inductance coil L1 and the first variable capacitor C1, and described power coil also can be made up of the first inductance coil L1 and the first variable capacitor C1 parallel connection; Described receiving terminal 3 is made up of jointly loading coil and corresponding electric capacity adaptive adjustment module.Loading coil is in series by the 4th inductance coil L4 and the 4th variable capacitor C4, and described loading coil also can be made up of the 4th inductance coil L4 and the 4th variable capacitor C4 parallel connection; Described the first inductance coil L1, the 4th inductance coil L4 are helical coil structure, and the two co-axially align.Described transmitting terminal power supply conditioning module 9 is divided into two-way output, and a road is the power coil power supply of high-frequency ac power to transmitting terminal 2, and another road is to the electric capacity adaptive adjustment module power supply of transmitting terminal 2.Described receiving terminal power supply conditioning module 4 on the one hand the high-frequency ac of loading coil is converted to industrial-frequency alternating current or direct current is powered to load 5, powers on the other hand to the electric capacity adaptive adjustment module of receiving terminal 3.The electric capacity adaptive adjustment module that described power coil is corresponding comprises current sensor 8 and processing module 7 two parts, current sensor 8 is arranged on measuring circuit electric current on power coil loop, measurement result is transferred to processing module 7, processing module 7 provides working power by port 71, port 71 is connected with transmitting terminal voltage conditioning module 9, port 72 is connected with the DC control port 62 of the first variable capacitor C1, as shown in Figure 4.The electric capacity adaptive adjustment module electric capacity adaptive adjustment module corresponding to power coil that described loading coil is corresponding has same structure, be that corresponding current sensor is arranged on loading coil loop measurement electric current, measurement result is transferred to corresponding processing module, processing module has three ports, be used for respectively received current signal, power supply and output control signal.The processing module of the electric capacity adaptive adjustment module that loading coil is corresponding is powered by receiving-end voltage conditioning module 4.
Fig. 2 is the schematic diagram of the second execution mode of the present invention, and as shown in Figure 2, resonance type wireless transmitting device 1 of the present invention comprises transmitting terminal 2, receiving terminal 3, transmitting terminal voltage conditioning module 9 and receiving-end voltage conditioning module 4.One termination power frequency AC of described radio transmitting device 1, another termination load 5.Described transmitting terminal 2 is made up of jointly the electric capacity adaptive adjustment module of power coil and transmitting coil and correspondence.Power coil is in series by the first inductance coil L1 and the first variable capacitor C1, described power coil also can be made up of the first inductance coil L1 and the first variable capacitor C1 parallel connection, and transmitting coil is in series by the second inductance coil L2 and the second variable capacitor C2; Described the first inductance coil L1, the second inductance coil L2 are helical coil structure, and the two co-axially align.Described transmitting terminal power supply conditioning module 9 is divided into two-way output, and the power frequency electricity of power frequency AC is converted to the power coil power supply of high frequency electric source to transmitting terminal 2 by a road, and another road is to the electric capacity adaptive adjustment module power supply of transmitting terminal 2.Power coil shown in connected mode and Fig. 1 of power coil, transmitting coil and corresponding electric capacity adaptive adjustment module is identical with electric capacity adaptive adjustment module connected mode.
Described receiving terminal 3 is made up of jointly the electric capacity adaptive adjustment module of receiving coil and loading coil and correspondence.Receiving coil is in series by the 3rd inductance coil L3 and the 3rd variable capacitor C3, and loading coil is in series by the 4th inductance coil L4 and the 4th variable capacitor C4; Described loading coil also can be made up of the 4th inductance coil L4 and the 4th variable capacitor C4 parallel connection; Described the 3rd inductance coil L3, the 4th inductance coil L4 are helical coil structure, and the two co-axially align.Described receiving terminal power supply conditioning module 4 on the one hand the high-frequency ac of loading coil is converted to industrial-frequency alternating current or direct current is powered to load 5, powers on the other hand to the electric capacity adaptive adjustment module of receiving terminal 3.Loading coil shown in connected mode and Fig. 1 of loading coil and electric capacity adaptive adjustment module is identical with electric capacity adaptive adjustment module connected mode, the electric capacity adaptive adjustment module that receiving coil is corresponding also comprises current sensor and two parts of processing module, current sensor is arranged on receiving coil loop, measuring circuit electric current, and result is transferred to processing module, processing module comprises three ports, received current signal respectively, power supply and output control signal, the processing module that receiving coil is corresponding is powered by receiving-end voltage conditioning module 4.
Described transmitting terminal 2 is fixing with receiving terminal 3 distances, and transmitting coil, power coil, receiving coil, loading coil co-axially align, stable with guaranteed efficiency.
Fig. 3 is the schematic diagram of the third execution mode of the present invention.As shown in Figure 3, resonance type wireless transmitting device 1 of the present invention comprises transmitting terminal 2, receiving terminal 3, transmitting terminal voltage conditioning module 9 and receiving-end voltage conditioning module 4.The difference of present embodiment and Fig. 2 illustrated embodiment is, power coil is made up of the first inductance coil L1 and the first variable capacitor C1 parallel connection; Loading coil is made up of the 4th inductance coil L4 and the 4th variable capacitor C4 parallel connection.
Fig. 4 is that power coil of the present invention and self adaptation regulate schematic diagram.As shown in Figure 4, power coil is in series by the first inductance coil L1 and the first variable capacitor C1; Described power coil is powered by power frequency AC by port one 1.The annexation of described power coil and electric capacity adaptive adjustment module is as described below: electric capacity adaptive adjustment module is made up of current sensor 8 and processing module 7.Described current sensor 8 is arranged on measuring circuit electric current on power coil loop, described current sensor 8 provides power coil current signal by port 73 to processing module 7, processing module 7 provides working power by port 71, and port 71 is connected with transmitting terminal voltage conditioning module 9.Be connected with the DC control port 62 of the first variable capacitor C1 by port 72, the opposite polarity control voltage of output equal and opposite in direction, the capacitance of control the first variable capacitor C1.
Fig. 5 is the present invention's variable capacitor schematic diagram used, and as shown in Figure 5, variable capacitor 6 comprises capacitor body and AC power port 61, DC control port 62.Its feature is that the capacitance of this capacitor is different and different with the voltage of DC control port 62.
Claims (5)
1. a resonance vibration type wireless energy transform device, is characterized in that: described wireless energy transform device (1) comprises transmitting terminal (2), receiving terminal (3), transmitting terminal power supply conditioning module (9) and receiving terminal power supply conditioning module (4); One termination power frequency AC of described wireless energy transform device (1), another termination load (5); Transmitting terminal (2) is made up of with corresponding electric capacity adaptive adjustment module power coil; Receiving terminal (3) is made up of with corresponding electric capacity adaptive adjustment module loading coil; Described power coil, loading coil are made up of capacitor and inductance coil serial or parallel connection respectively; Described transmitting terminal power supply conditioning module (9) output two-way, the power frequency electricity of power frequency AC is converted to the power coil power supply of high frequency electric source to transmitting terminal (2) by one tunnel, and another road is connected with the processing module of transmitting terminal (2) one lateral capacitance adaptive adjustment module; The high frequency electric source of the input access receiving terminal output of described receiving terminal power supply conditioning module (4), receiving terminal power supply conditioning module (4) output two-way, one tunnel is load (5) power supply, and another road is connected with the processing module of receiving terminal one lateral capacitance adaptive adjustment module; Capacitor in described power coil, loading coil is the variable capacitor by the control of electric capacity adaptive adjustment module, by corresponding electric capacity adaptive adjustment module control.
2. according to resonance vibration type wireless energy transform device claimed in claim 1, it is characterized in that: when the capacitor of described transmitting terminal (2) power coil is connected with inductance coil, capacitor is connected with high-frequency ac power two ends respectively with the disjunct terminal of inductance coil; When the capacitor of power coil is in parallel with inductance coil, high-frequency ac power two ends are connected with the two ends of capacitor respectively; The inductance coil inductance value of described power coil is identical with high-frequency alternating current source frequency with the resonance frequency of capacitor; When the inductance coil of described receiving terminal (3) loading coil and capacitor's series, capacitor is connected with the two ends of load (5) respectively with the disjunct terminal of inductance coil, when the inductance coil of loading coil and Parallel-connected Capacitor, the two ends of load (5) are connected with the two ends of capacitor respectively; The inductance coil of described loading coil is identical with the resonance frequency of power coil with the resonance frequency of capacitor.
3. a resonance vibration type wireless energy transform device, is characterized in that: described wireless energy transform device (1) comprises transmitting terminal (2), receiving terminal (3), transmitting terminal voltage conditioning module (9) and receiving-end voltage conditioning module (4); One termination power frequency AC of described radio transmitting device (1), another termination load (5); Described transmitting terminal (2) is made up of jointly power coil and transmitting coil and each self-corresponding electric capacity adaptive adjustment module; Power coil is in series or in parallel to form by the first inductance coil (L1) and the first variable capacitor (C1), and transmitting coil is in series by the second inductance coil (L2) and the second variable capacitor (C2); Described transmitting terminal power supply conditioning module (9) is divided into two-way output, the power frequency electricity of power frequency AC is converted to the power coil power supply of high frequency electric source to transmitting terminal (2) by one tunnel, and another road is to the electric capacity adaptive adjustment module power supply of transmitting terminal (2); Described receiving terminal (3) is made up of jointly receiving coil and loading coil and each self-corresponding electric capacity adaptive adjustment module; Receiving coil is in series by the 3rd inductance coil (L3) and the 3rd variable capacitor (C3), and loading coil is in series or in parallel to form by the 4th inductance coil (L4) and the 4th variable capacitor (C4); Described receiving terminal power supply conditioning module (4) is converted to the high-frequency ac of loading coil industrial-frequency alternating current or direct current on the one hand to load (5) power supply, powers on the other hand to the electric capacity adaptive adjustment module of receiving terminal (3); The resonance frequency of described power coil, transmitting coil, receiving coil, loading coil is identical; Described variable capacitor (C1), the second variable capacitor (C2), the 3rd variable capacitor (C3) and the 4th variable capacitor (C4) are by corresponding electric capacity adaptive adjustment module control.
4. according to the resonance vibration type wireless energy transform device described in claim 1 or 3, it is characterized in that: described electric capacity adaptive adjustment module comprises current sensor (8) and (7) two parts of processing module of being arranged on inductance coil or capacitor loops; Described current sensor (8), for measuring circuit current amplitude, provides coil current signal to corresponding processing module (7); Described processing module (7) output equal and opposite in direction, opposite polarity control voltage, the capacitance of the capacitor of control transmitting terminal and receiving terminal coil; Described processing module (7) has a pair of power end, a pair of signal output part, a current signal input; The power end of described processing module (7) obtains energy and arranges as the required amplitude power supply of processing module from transmitting terminal or receiving terminal; The signal of the current signal input input current transducer (1) of described processing module (7), the current signal obtaining according to current sensor measurement, with set point relatively after, the signal output part of processing module (7) is exported equal and opposite in direction according to comparative result, opposite polarity voltage signal, the capacitor of control transmitting terminal coil and receiving terminal coil.
5. according to the resonance vibration type wireless energy transform device described in claim 1 or 3, it is characterized in that: described transmitting coil, power coil, loading coil, the each self-corresponding electric capacity adaptive adjustment module independent regulation of receiving coil.
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| CN201410364164.2A CN104135086A (en) | 2014-07-28 | 2014-07-28 | Resonant wireless energy transfer device |
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| CN201410364164.2A CN104135086A (en) | 2014-07-28 | 2014-07-28 | Resonant wireless energy transfer device |
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| CN106160265A (en) * | 2016-07-12 | 2016-11-23 | 武汉大学 | Wireless power supply |
| JP2018113778A (en) * | 2017-01-11 | 2018-07-19 | 矢崎総業株式会社 | Non-contact power supply system and non-contact power supply method |
| CN109075612A (en) * | 2016-03-15 | 2018-12-21 | X2 动力科技有限公司 | Wireless power transmission control device and method |
| CN110768385A (en) * | 2018-07-27 | 2020-02-07 | 上海磊恰电子科技有限公司 | Current error reduction method and system for wireless charging transmitting equipment |
| CN112491158A (en) * | 2020-11-17 | 2021-03-12 | 哈尔滨工业大学 | Circuit structure with adjustable current proportion between two parallel-wound wireless power transmission coil strands and parameter design method |
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Inventor after: Zhang Guoqiang Inventor after: Li Kang Inventor after: Wang Quanhui Inventor before: Zhang Guoqiang Inventor before: Li Kang |
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Effective date of registration: 20150910 Address after: 100190 Beijing, Zhongguancun, north of No. two, No. 6, No. Applicant after: Institute of Electrical Engineering of the Chinese Academy of Sciences Applicant after: FOSHAN ZHONGMING ELECTRONIC INDUSTRIAL CO., LTD. Address before: 100190 Beijing, Zhongguancun, north of No. two, No. 6, No. Applicant before: Institute of Electrical Engineering of the Chinese Academy of Sciences |
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