WO2014098279A1 - Appareil de réception d'énergie sans fil en mesure d'améliorer le rendement et l'alimentation en énergie à l'aide de la modulation de la résistance à la charge effective de l'extrémité de réception - Google Patents

Appareil de réception d'énergie sans fil en mesure d'améliorer le rendement et l'alimentation en énergie à l'aide de la modulation de la résistance à la charge effective de l'extrémité de réception Download PDF

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Publication number
WO2014098279A1
WO2014098279A1 PCT/KR2012/011077 KR2012011077W WO2014098279A1 WO 2014098279 A1 WO2014098279 A1 WO 2014098279A1 KR 2012011077 W KR2012011077 W KR 2012011077W WO 2014098279 A1 WO2014098279 A1 WO 2014098279A1
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WIPO (PCT)
Prior art keywords
load resistance
wireless power
power
modulation circuit
receiver
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Application number
PCT/KR2012/011077
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English (en)
Korean (ko)
Inventor
홍성철
안덕주
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한국과학기술원
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Priority to CN201280078160.7A priority Critical patent/CN104937810B/zh
Publication of WO2014098279A1 publication Critical patent/WO2014098279A1/fr

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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
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • 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
    • 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
    • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
    • H04B5/24—Inductive coupling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
    • H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer

Definitions

  • the present invention relates to a wireless power transmission system, and more particularly to a wireless power receiving apparatus for improving the transmission power by using the effective load resistance modulation of the receiving end.
  • the wireless power transmission system is mainly composed of a transmitter DC power supply, a transmitter resonant inverter, a transmission resonator, a reception resonator, a rectifier circuit unit, and a power converter.
  • a transmitter DC power supply a transmitter resonant inverter
  • a transmission resonator a transmission resonator
  • a reception resonator a rectifier circuit unit
  • a power converter mainly composed of a power supply, a transmitter resonant inverter, a transmission resonator, a reception resonator, a rectifier circuit unit, and a power converter.
  • the problem is that it is difficult to change the load resistance at will.
  • the load resistance is determined by the power requirements of the devices that actually consume power, not the design variables of the system. Impedance conversion circuitry can convert the effective load resistance seen by the receiving resonator and improve performance.
  • the existing impedance conversion circuits could not change the impedance conversion ratio freely and had a fixed conversion ratio.
  • the power-conversion circuitry behind the existing receivers only had the ability to limit power when more power was received than required. Therefore, when the received power was less than the required power, it was not possible to supply enough of the desired power to the actual load resistor.
  • the purpose of the present patent is not to control the power, but to improve the resonator efficiency with the help of a power conversion circuit. Even though the proposed receiver receives the same power at the same distance, its efficiency increases because it operates in amplified its own equivalent resistance (reflected resistance). Higher efficiency is obtained when adding the proposed load resistance modulator than without.
  • the problem to be solved by the present invention is that the conventional impedance conversion circuits used in the conventional wireless power transmission system can not change the impedance conversion ratio at will and have a fixed conversion ratio, so that a specific distance or a specific loading between the transmitter and the receiver Performance can be optimized under current conditions, but wireless power transfer improves transfer power by using effective load resistance modulation at the receiver to resolve the problem of performance deterioration and system instability when distance or loading current changes. To provide a system.
  • Wireless power receiver for solving the above problems is a receiver for receiving power from a power transmitter; A rectifying circuit unit rectifying and outputting a current output from the receiving unit; And a control signal including a duty ratio, and adjusts the flow of current applied from the rectifying circuit part according to the received control signal to vary the magnitude of the effective load resistance, thereby improving efficiency. It includes a; load resistance modulator for increasing the size of the resistance.
  • the overall system efficiency and output power can be increased by changing the effective load resistance in the direction in which the loaded-Q of the receiver increases to increase the reflected resistance projected by the transmitter.
  • the equivalent resistance can be increased. It has the advantage of maintaining power.
  • 1 is an exemplary diagram showing a correlation between a series receiving resonator and an equivalent resistance.
  • FIG. 2 is an exemplary diagram showing a correlation between a parallel receiving resonator and an equivalent resistance.
  • FIG. 3 is a block diagram showing a wireless power transmission system according to an embodiment of the present invention.
  • FIG. 4 is an exemplary diagram illustrating an example of the rectification circuit diagram illustrated in FIG. 3.
  • FIG. 5 is an exemplary diagram illustrating a first modulation circuit (boost type modulation circuit) which is a first embodiment of a load resistance modulator of the present invention.
  • FIG. 6 is an exemplary diagram illustrating a second modulation circuit (boost type modulation circuit) which is a second embodiment of the load resistance modulator of the present invention.
  • FIG. 7 is an exemplary view showing a third modulation circuit (SEPIC type modulation circuit) which is a third embodiment of the load resistance modulator of the present invention.
  • SEPIC type modulation circuit SEPIC type modulation circuit
  • FIG. 8 is an exemplary view illustrating a fourth modulation circuit (buck type modulation circuit) as a fourth embodiment of the load resistance modulator of the present invention.
  • FIG. 9 is an exemplary diagram illustrating a fifth modulation circuit (a flyback modulation circuit receiving a pulsating DC voltage input), which is a fifth embodiment of the load resistance modulator of the present invention.
  • FIG. 10 is an exemplary diagram illustrating a sixth modulation circuit (buck-boost-cascade) as a sixth embodiment of a load resistance modulator of the present invention.
  • 11 is an exemplary diagram illustrating an example of equivalent conversion of the receiver in series or parallel in order to increase the equivalent resistance through load resistance modulation when the receiver of the present invention is mixed in a series resonance structure and a parallel resonance structure. .
  • FIG. 12 is a flowchart illustrating a method of driving the wireless power receiver shown in FIG. 3.
  • FIG. 13 is a flowchart illustrating a method of driving the wireless power transmission system shown in FIG. 3.
  • Figure 14 (a) is a graph comparing the transmission power according to the change in the distance between the wireless power transmission apparatus and the wireless power receiver between the present invention and the conventional invention
  • Figure 14 (b) is a view of the present invention and the conventional invention It is a graph comparing the transmission power according to the distance change between the transmitter and the receiver. (Load-modulated: Inventive, Rectifier-only)
  • Figure 15 (a) is a graph comparing the efficiency of the transmission power according to the distance at 21.6W output in the present invention and the conventional invention
  • Figure 15 (b) is the transmission power at 10.9W output in the present invention and the conventional invention
  • This is a graph comparing the efficiency of (Load-modulated: the present invention, Rectifier-only: conventional invention).
  • Embodiments according to the concept of the present invention may be variously modified and may have various forms, and specific embodiments will be illustrated in the drawings and described in detail in the present specification or application. However, this is not intended to limit the embodiments in accordance with the concept of the present invention to a particular disclosed form, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.
  • the size of the equivalent resistance in the wireless power transmission apparatus can be represented by Equation 1 described below.
  • k is the coupling coefficient between the transmitting coil in the transmitter and the receiving resonator in the receiver
  • L1 is the inductance of the transmitting coil
  • the loaded-Q of the receiving resonator is Q RX
  • the resonance frequency of the resonators and the inverter switching frequency are w0.
  • the coupling effect between the transmission coil and the receiver is represented by one equivalent resistance (R reflected ) to the transmission coil.
  • R reflected Equivalent resistance (R reflected ) is referred to as reflected resistance because the effect of the receiver is projected onto the transmission coil.
  • the equivalent resistance R reflected is connected in series with the parasitic resistance R TXparasitic of the transmitting coil L1. Therefore, increasing the equivalent resistance (R reflected ) is a condition of high efficiency and high output.
  • the equivalent resistance is dependent on Q RX with reference to Equation 1, and Q RX is again determined by the load resistance of the receiving resonator.
  • the effective load resistance and the equivalent resistance of the receiving resonator are varied through the load resistance modulation circuit to increase the efficiency of the transmission power and the transmission power.
  • FIG. 3 is a block diagram showing a wireless power transmission system according to an embodiment of the present invention.
  • 4 is an exemplary diagram illustrating an example of the rectification circuit diagram illustrated in FIG. 3.
  • the wireless power transmission system 300 of the present invention includes a wireless power transmission device 100 and a wireless power reception device 200.
  • the wireless power transmitter 100 transmits power.
  • the wireless power transmission apparatus 100 includes a DC power supply and a transmission resonator, and performs a function of transmitting power generated from the DC power supply to the outside through the inductor L1 in the rosin resonance part.
  • the wireless power receiver 200 adjusts the size of the equivalent resistance to improve wireless power transmission efficiency.
  • the wireless power receiver 200 includes a receiver 120, a rectifier circuit 130, and a load resistance modulator 140.
  • the receiver 120 receives power from the wireless power transmitter.
  • the rectifier circuit 130 rectifies and outputs the current output from the receiver 120.
  • the load resistance modulator 140 receives a control signal including a duty ratio and adjusts the flow of current applied from the rectifier circuit 130 according to the received control signal CNT. By varying the magnitude of the load resistor, the magnitude of the equivalent resistor in the power transmitter is adjusted to improve the efficiency.
  • the control signal CNT controls the driving of the load resistance modulator 140. More specifically, the control signal CNT is a control signal CNT that is a pulse signal having a fixed or variable duty ratio. It periodically turns on / off the switching element in the modulator 140.
  • the receiver 120 may be configured such that the inductor L and the capacitor C have a series or parallel connection structure or a mixture of series and parallel. A more detailed description will be given with reference to FIG. 10 described below.
  • the rectifier circuit 130 includes a first rectifier 131, a second rectifier 132, and a rectifier circuit output filter 133, and the current rectified from the receiver 120. Is applied to the load resistance modulator 140.
  • the first rectifier 131 has two diodes D connected in series through a first node n1
  • the second rectifier 132 has two diodes D connected through a second node n2.
  • the first rectifier 131 and the second rectifier 132 are connected in parallel.
  • the rectifier circuit 130 is connected in parallel with the rectifier circuit output filter (C).
  • the alternating current applied by the receiving unit 120 is output as a direct current through the output filter C of the rectifying circuit unit 130 via a diode which is a rectifying element of the first rectifying unit 131.
  • the load resistance modulator 140 adjusts the flow of the current applied from the rectifier circuit 130 to change the size of the load resistor R L. More specifically, the flow of the current applied from the rectifier circuit 130 is adjusted to increase or decrease the magnitude of the effective load resistance.
  • FIG. 5 is an exemplary diagram illustrating a first modulation circuit (boost type modulation circuit) which is a first embodiment of a load resistance modulator of the present invention.
  • the load resistance modulator 140 is variable according to the connection structure of the inductor L and the capacitor C in the receiver 120, and in the case of the series connection structure, A first modulation circuit 210, a second modulation circuit 220, or a third modulation circuit 230, and in the case of a parallel connection structure, the fourth modulation circuit 240, the fifth modulation circuit 250, Or a sixth modulation circuit 260.
  • the first modulation circuit 210 may be a boost type circuit including an inductor 211, a first switching element 212, a second switching element 213, and a capacitor 214.
  • one end of the inductor 211 is connected to the rectifier and the other end is connected to the third node N3.
  • the drain terminal of the first switching element 212 is connected to the third node N3 and the source terminal is connected to the fourth node N4.
  • One end of the second switching element 213 is connected to the third node N3 and the other end thereof is connected to the fifth node N5.
  • the control signal CNT which is a pulse signal, is applied to the gate terminal of the first switching element 212.
  • the duty ratio of the control signal CNT may have a fixed value or may vary according to the output voltage of the load resistor.
  • the first switching element 212 and the second switching element 213 are alternately turned on.
  • the current flowing in the inductor 211 becomes larger (current buildup).
  • the current flowing through the inductor is built up through the first switching element 212 and the rectifier circuit 130.
  • the voltage applied to the third node N3 increases, and the second switching element 213 is turned on at the moment when the first switching element 212 becomes higher than or equal to the threshold voltage of the second switching element 213. Accordingly, the current flowing through the inductor 211 is applied to the load resistor RL.
  • the first modulation circuit 210 adjusts the current flow according to the duty ratio of the control signal CNT, which is a pulse signal, thereby making the input resistance smaller than the conventional load resistance, thereby making it equivalent in the wireless power transmitter 100. Can increase resistance. This increases the transmission efficiency and the amount of power of the wireless power.
  • FIG. 6 is an exemplary view showing a second modulation circuit (boost type modulation circuit) which is a second embodiment of the load resistance modulator of the present invention.
  • boost type modulation circuit boost type modulation circuit
  • the second modulation circuit 220 is a circuit diagram illustrating an example of a boost type circuit that receives a pulsating DC current.
  • the second modulation circuit 220 includes a first switching element 221, a second switching element 222, and a capacitor 223.
  • the drain terminal of the first switching element 221 is connected to the third node N3, the gate terminal is connected to the controller 170, and the source terminal is connected to the fourth node N4.
  • One end of the second switching element 222 is connected to the third node N3 and the other end thereof to the fifth node N5.
  • the capacitor 223 is connected in parallel with the second switching element 222.
  • the second modulation circuit 222 is a circuit in which the rectifier circuit output C filter of the power receiver and the inductor of the load resistance modulator of the power receiver are removed from the first modulation circuit 210.
  • the amplitude of the resonance current gradually increases in the receiver.
  • the turn-on period of the first switching element 221 is long (that is, the on duty period is long)
  • a current buildup occurs in the receiver 120. Therefore, the effective load resistance seen by the receiver 120 becomes small and the equivalent resistance becomes large.
  • FIG. 7 is an exemplary view showing a third modulation circuit (SEPIC type modulation circuit) which is a third embodiment of the load resistance modulator of the present invention.
  • SEPIC type modulation circuit SEPIC type modulation circuit
  • the third modulation circuit 230 is a circuit illustrating an example of a SEPIC type conversion circuit that receives a pulsating DC current, and more specifically, the first switching device 231 and the second switching device. 234, a first capacitor 232, a second capacitor 235, and an inductor 233.
  • the first switching device has a drain terminal connected to the third node N3, a gate terminal connected to the controller, and a source terminal connected to the fourth node N4.
  • the second switching element 234 is a diode, one end of which is connected to the sixth node N6 and the other end of which is connected to the sixth node N6.
  • One end of the second capacitor 235 is connected to the seventh node N7 and the other end thereof is connected to the eighth node N8.
  • the inductor connected to the sixth node N6 is in a current buildup state to supply the current I LS to the fifth node N5.
  • the voltage according to the amount of current I CS + I SL applied to the fifth node N5 is greater than the threshold voltage of the second switching device 234.
  • the second switching element 234 is turned on so that the current applied to the fifth node N5 is increased.
  • the size of the load resistor R L shown in the receiver 120 may be larger or smaller by adjusting the effective load resistance in the load resistance modulator 140. This principle can reduce or increase the equivalent resistance.
  • FIG. 8 is an exemplary view illustrating a fourth modulation circuit (buck type modulation circuit) as a fourth embodiment of the load resistance modulator of the present invention.
  • the fourth modulation circuit 240 is a circuit diagram illustrating an example of a buck type conversion circuit for increasing an input resistance.
  • the first switching element 241, the second switching element 242, the inductor 243 and the capacitor 244 are included.
  • the first switching element 241 has a drain terminal connected to the rectifier circuit 130, a gate terminal connected to the controller 170, and a drain terminal connected to the third node N3.
  • the second switching element 242 may be a diode, one end of which is connected to the third node N3 and the other end of which is connected to the fourth node N4.
  • One end of the inductor 243 is connected to the third node N3 and the other end thereof is connected to the fifth node N5.
  • One end of the capacitor 244 is connected to the third node N3 so as to be connected in parallel with the inductor, and the other end thereof is connected to the sixth node N6.
  • the effective load resistance is fixed. If the first switching element 241 is turned off, the flow of current decreases and the effective load resistance becomes large, whereby a larger equivalent resistance is seen in the wireless power transmission apparatus.
  • FIG. 9 is an exemplary diagram illustrating a fifth modulation circuit (a flyback modulation circuit receiving a pulsating DC voltage input), which is a fifth embodiment of the load resistance modulator of the present invention.
  • the fifth modulation circuit 250 is a circuit diagram illustrating an example of a flyback modulation circuit receiving a pulsating DC voltage input.
  • the fifth modulation circuit 250 includes a flyback transformer 253, a first switching element 254, in which the directions of the coils wound in the first inductor 251 and the second inductor 252 are reversed.
  • the second switching element 255 and the capacitor 256 is included.
  • the coils wound in the first inductor 251 and the coils wound in the second inductor 252 are formed in a reverse direction, thereby applying current using the counter electromotive force. do.
  • the first switching device 254 has a source terminal connected to the other end of the first inductor 251, a control signal applied to the gate terminal, and a drain terminal connected to the fourth node N4.
  • One end of the second inductor 252 is connected to one end of the diode, and the other end thereof is connected to one end of the capacitor 256.
  • the capacitor 256 is connected in parallel with the diode.
  • the turn-off period of the first switching element 254 becomes longer as the off duty ratio of the control signal, which is a pulse signal applied to the fifth modulation circuit 250, increases, the first inductor 251 to the second inductor 252.
  • the flow of current applied to decreases and the resonance voltage applied to the receiver 120 increases.
  • the effective load resistance is increased.
  • the receiver 120 induces the equivalent resistance in the wireless power transmitter to increase.
  • the increased equivalent resistance increases the efficiency and power of the power delivery, resulting in an increase in the amount and efficiency of the power transmitted to the wireless power receiver.
  • FIG. 10 is an exemplary diagram illustrating a sixth modulation circuit (buck-boost-cascade) as a sixth embodiment of a load resistance modulator of the present invention.
  • the sixth modulation circuit 260 is a circuit diagram illustrating an example of a buck-boost-cascade type circuit that receives a pulsating DC voltage input.
  • the sixth modulation circuit 260 may include a first switching element 261, a second switching element 262, an inductor 263, a third switching element 264, a fourth switching element 265, and Capacitor C is included.
  • a source terminal is connected to the rectifier circuit unit 130, a control signal CNT is applied to the gate terminal, and a drain terminal is connected to the third node N3.
  • One end of the inductor 263 is connected to the third node N3 and the other end is connected to the fifth node N5.
  • One end of the second switching element 262 is connected to the third node N3, and the other end thereof is connected to the fourth node N4.
  • a source terminal is connected to the fifth node N5
  • a gate terminal is connected to the controller 170
  • a drain terminal is connected to the sixth node N6.
  • One end of the capacitor 267 is connected to the seventh node N7, and the other end thereof is connected to the eighth node N8.
  • the first and third switching elements 261 and 264 simultaneously receive the control signal CNT, which is the same pulse signal, to perform the turn on / turn off operation.
  • the effective load resistance seen by the receiver 120 becomes large, so that the equivalent resistance in the transmitter becomes large. Therefore, the amount of power output from the wireless power transmission apparatus 100 and the efficiency of power transmission can be increased.
  • FIG. 11 is an exemplary diagram illustrating an example of equivalent conversion of a receiver in series or parallel in order to increase an equivalent resistance through load resistance modulation when the receiver of the present invention is mixed in a series resonance structure and a parallel resonance structure. .
  • the power receiver includes both series resonance and parallel resonance structures by C2A and C2B.
  • the power receiver includes both series resonance and parallel resonance structures by C2A and C2B.
  • the receiver is converted into a parallel resonance structure, in which the load resistance value is scaled by changing inversely. (In other words ).
  • FIG. 12 is a flowchart illustrating a method of driving the wireless power receiver shown in FIG. 3.
  • the method S10 of driving the wireless power receiver includes a receiving step S11, a rectifying step S12, and a variable load resistance step S13.
  • the receiving unit receives power from the wireless power transmitter 100.
  • the rectifying step S12 is a step in which the rectifying circuit rectifies the generated current by the received power.
  • the load resistance modulator 140 receives a control signal including a duty ratio, and adjusts the flow of the current according to the control signal CNT, thereby enabling effective load resistance. By varying the size of, to adjust the size of the equivalent resistance to improve the efficiency.
  • the duty ratio may be a fixed or variable duty ratio, and the rectifying step S12 may include generating a pulsating DC current.
  • FIG. 13 is a flowchart illustrating a method of driving the wireless power transmission system shown in FIG. 3.
  • a method S100 of driving a wireless power transmission system includes a transmission step S110, a reception step S120, a rectification step S130, and a load resistance variable step S140.
  • the transmitting step (S110) is a step in which the wireless power transmission apparatus 100 transmits power.
  • the receiving step (S120) is a step in which the wireless power receiving apparatus 200 receives the transmitted power.
  • the wireless power receiver 200 rectifies the current generated by the received power.
  • the wireless power receiver 200 receives a control signal CNT including a duty ratio, and adjusts the flow of current according to the control signal CNT.
  • a control signal CNT including a duty ratio By varying the size of the load resistance, thereby adjusting the size of the equivalent resistance to improve the efficiency of the transmission power.
  • Figure 14 (a) is a graph comparing the transmission power according to the change of the distance between the transmitter and the receiver between the present invention and the conventional invention
  • Figure 14 (b) is the distance between the transmitter and receiver between the present invention and the conventional invention This is a graph comparing the transmission power according to the change.
  • Figure 15 (a) is a graph comparing the efficiency of the transmission power according to the distance at 21.6W output in the present invention and the conventional invention
  • Figure 15 (b) is the transmission power at 10.9W output in the present invention and the conventional invention This is a graph comparing the efficiency of.
  • the present invention can adjust the magnitude (resistance value) of the equivalent resistance by receiving the receiver output voltage as a feedback. It can also supply constant power even over long distances.
  • the conventional invention fails to supply power when the output power to the power converter before the power converter falls far below the power required by the actual load resistance.
  • the equivalent resistance can be increased, so that the output power of the transmitter required even a longer distance is increased. I can keep it.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Dc-Dc Converters (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente invention a trait à un appareil de réception d'énergie sans fil qui est en mesure d'améliorer l'alimentation en énergie à l'aide d'une modulation d'une résistance à la charge effective d'une extrémité de réception, et à un système d'alimentation en énergie sans fil utilisant ledit appareil. Une unité de réception de l'appareil de réception d'énergie sans fil reçoit de l'énergie en provenance d'un émetteur d'énergie sans fil. Une unité de circuit redresseur redresse le courant qui est fourni en sortie par l'unité de réception et fournit en sortie le courant redressé. Une Unité de modulation de résistance à la charge reçoit un signal de commande qui comprend un facteur de marche, commande l'écoulement du courant qui est appliqué à partir de l'unité de circuit redresseur en fonction du signal de commande reçu de manière à varier le degré de la résistance à la charge effective, et augmente le degré de la résistance équivalente de sorte à améliorer le rendement.
PCT/KR2012/011077 2012-12-18 2012-12-18 Appareil de réception d'énergie sans fil en mesure d'améliorer le rendement et l'alimentation en énergie à l'aide de la modulation de la résistance à la charge effective de l'extrémité de réception WO2014098279A1 (fr)

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CN201280078160.7A CN104937810B (zh) 2012-12-18 2012-12-18 能够通过调制接收端的有效负载电阻提高效率及功率传送的无线功率接收装置

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KR1020120148249A KR101390954B1 (ko) 2012-12-18 2012-12-18 수신단의 유효 로드저항 변조를 이용하여 효율과 전달전력을 향상시키는 무선전력수신 장치
KR10-2012-0148249 2012-12-18

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KR102391190B1 (ko) * 2015-03-13 2022-04-28 삼성전자주식회사 무선 충전 시스템에서 무선 전력 수신기의 로드 생성 방법 및 무선 전력 수신기
KR101847256B1 (ko) * 2016-01-11 2018-05-28 한국전자통신연구원 무선전력 수신장치, 그를 포함하는 무선전력 전송 시스템 및 수신단의 유효부하저항 변환비율을 자동으로 제어하는 방법
DE102016210018A1 (de) * 2016-06-07 2017-12-07 Robert Bosch Gmbh Übertragungssystem zum kontaktlosen Übertragen von Energie
KR102622053B1 (ko) 2016-07-18 2024-01-08 삼성전자주식회사 전자장치, 디스플레이 장치 및 그 장치들의 구동방법
KR102154240B1 (ko) 2017-07-06 2020-09-09 한국전자통신연구원 일정한 피치를 가지는 수신 코일을 포함하는 무선 전력 전송 시스템
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