WO2024062647A1 - Système, procédé et programme permettant de mesurer des caractéristiques d'un circuit redresseur pour la transmission d'énergie sans fil - Google Patents

Système, procédé et programme permettant de mesurer des caractéristiques d'un circuit redresseur pour la transmission d'énergie sans fil Download PDF

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Publication number
WO2024062647A1
WO2024062647A1 PCT/JP2023/005370 JP2023005370W WO2024062647A1 WO 2024062647 A1 WO2024062647 A1 WO 2024062647A1 JP 2023005370 W JP2023005370 W JP 2023005370W WO 2024062647 A1 WO2024062647 A1 WO 2024062647A1
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Prior art keywords
input
power transmission
rectifier circuit
measurement
signal
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PCT/JP2023/005370
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English (en)
Japanese (ja)
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昂 平川
直輝 長谷川
悠太 中本
喜元 太田
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ソフトバンク株式会社
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Publication of WO2024062647A1 publication Critical patent/WO2024062647A1/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
    • H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves

Definitions

  • the present invention relates to a system, method, and program for measuring the characteristics of a rectifier circuit for wireless power transmission (WPT).
  • WPT wireless power transmission
  • a communication system that performs communication between a base station and a terminal device using at least part of a plurality of radio resources set in a radio frame (for example, see Patent Document 1).
  • a system that uses a mobile communication base station for wireless power transmission (WPT) as the power supply infrastructure for supplying power to the above-mentioned terminal devices is being considered.
  • WPT wireless power transmission
  • One of the challenges of such a system is to measure the characteristics of a rectifier circuit installed in a wireless power transmission receiving device when a high power signal is input, without damaging the rectifier circuit.
  • a system is a system that measures the characteristics of a rectifier circuit installed in a power receiving device for wireless power transmission. This system has characteristics at the time of power transmission wave input assuming that a power transmission wave signal used in the wireless power transmission is input to the rectifier circuit, and a measurement modulated wave whose power is smaller than that of the power transmission wave.
  • the rectifying circuit includes a measuring unit, and an estimating unit that estimates characteristics of the rectifier circuit when the power transmission wave signal is input based on the direct current characteristics of the output signal and the mapping.
  • the system may include a mapping determining unit that determines the mapping based on the characteristics when the power transmission wave is input and the characteristics when the measurement modulated wave is input.
  • the system may include a control unit that controls at least one of the measurement modulated wave and the load on the output signal from the rectifier circuit.
  • the power transmission wave is a continuous wave
  • the measurement modulation wave is a pulse modulation wave obtained by pulse modulating the power transmission wave with a predetermined duty ratio
  • the mapping information is a value of the duty ratio. May include.
  • the system may include a smoothing section that smoothes the output signal output from the rectifier circuit.
  • the relationship between the reflectance of the measurement modulated wave input to the rectifier circuit and the resistance of a load with respect to the output signal from the rectifier circuit is measured, and based on the measurement result, the reflectance is determined to be minimum.
  • the resistance of the load may be determined as a matching condition.
  • the matching condition may be used to set the resistance of the load when measuring the DC characteristics of the output signal, or the reflectance of the measurement modulated wave input to the rectifier circuit may be set.
  • the relationship between the reflectance and the resistance of the load when the power transmission wave is input to the rectifier circuit may be estimated based on the measurement result of the relationship between the power transmission wave and the resistance of the load.
  • a method is a method of measuring the characteristics of a rectifier circuit installed in a power receiving side device for wireless power transmission. This method is based on the power transmission wave input characteristics assuming that the power transmission wave signal used in the wireless power transmission is input to the rectifier circuit, and the measurement modulated wave whose power is smaller than the power transmission wave. Information on mapping from the measurement modulated wave input characteristics to the power transmission wave input characteristics determined based on the measurement modulated wave input characteristics assuming that a signal is input to the rectifier circuit. storing, generating a signal of the modulated wave for measurement and inputting it to the rectifier circuit, and measuring DC characteristics of an output signal output from the rectifier circuit into which the signal of the modulated wave for measurement was input. and estimating characteristics of the rectifier circuit when the power transmission wave signal is input based on the DC characteristics of the output signal and the mapping.
  • the method may include determining the mapping based on the characteristics when the power transmission wave is input and the characteristics when the measurement modulated wave is input.
  • the method may include controlling at least one of the measurement modulated wave and the load on the output signal from the rectifier circuit.
  • the power transmission wave is a continuous wave
  • the measurement modulation wave is a pulse modulation wave obtained by pulse modulating the power transmission wave with a predetermined duty ratio
  • the mapping information is a value of the duty ratio. May include.
  • the method may include smoothing the output signal output from the rectifier circuit.
  • the relationship between the reflectance of the measurement modulated wave input to the rectifier circuit and the resistance of a load with respect to the output signal from the rectifier circuit is measured, and based on the measurement result, the reflectance is determined to be minimum.
  • the method may include determining a resistance of the load as a matching condition.
  • the matching condition may be used to set the resistance of the load when measuring the DC characteristics of the output signal, or the method may include setting the resistance of the load when measuring the DC characteristics of the output signal, or
  • the method may include estimating the relationship between the reflectance and the resistance of the load when the power transmission wave is input to the rectifier circuit based on the measurement result of the relationship between the reflectance and the resistance of the load.
  • a program according to yet another aspect of the present invention is a program executed in a computer or processor included in a system for measuring characteristics of a rectifier circuit installed in a power receiving device for wireless power transmission.
  • This program describes the power transmission wave input characteristics assuming that the power transmission wave signal used in the wireless power transmission is input to the rectifier circuit, and the characteristics of the measurement modulated wave whose power is smaller than the power transmission wave.
  • Information on mapping from the measurement modulated wave input characteristics to the power transmission wave input characteristics determined based on the measurement modulated wave input characteristics assuming that a signal is input to the rectifier circuit.
  • the program may include a program code for determining the mapping based on the characteristics when the power transmission wave is input and the characteristics when the measurement modulated wave is input.
  • the program may include a program code for determining the mapping based on the characteristics when the power transmission wave is input and the characteristics when the measurement modulated wave is input.
  • the program may include a program code for controlling at least one of the measurement modulated wave and the load on the output signal from the rectifier circuit.
  • the power transmission wave is a continuous wave
  • the measurement modulation wave is a pulse modulation wave obtained by pulse modulating the power transmission wave with a predetermined duty ratio
  • the mapping information is a value of the duty ratio. May include.
  • the program may include a program code for smoothing the output signal output from the rectifier circuit.
  • the program code may include a program code for determining a resistance of the load as a matching condition.
  • it may include a program code for setting the resistance of the load when measuring the DC characteristic of the output signal using the matching condition, or a program code for setting the resistance of the load when measuring the DC characteristics of the output signal, or A program code for estimating the relationship between the reflectance and the resistance of the load when the power transmission wave is input to the rectifier circuit, based on the measurement result of the relationship between the reflectance of the modulated wave and the resistance of the load. May include.
  • the program that performs the estimation etc. includes a trained model used for machine learning.
  • the present invention it is possible to measure the characteristics of a rectifier circuit at the time of high power input when a power transmission wave signal is input without damaging the rectifier circuit installed in a power receiving side device for wireless power transmission.
  • FIG. 1 is an explanatory diagram showing an example of the overall configuration of a wireless power transmission system that can transmit power from a base station to a terminal device having a rectifier circuit whose characteristics can be measured with a measurement system according to an embodiment.
  • FIG. 2 is an explanatory diagram illustrating an example of power feeding from a base station of a wireless power transmission system to a plurality of terminal devices by beamforming for each terminal device.
  • FIG. 3 is a block diagram illustrating an example of the configuration of a base station and a terminal device that configure the wireless power transmission system.
  • FIG. 4A is an explanatory diagram illustrating an example of allocation of WPT blocks in radio resources (resource blocks) of a transmission signal including a WPT dummy signal transmitted from a base station.
  • FIG. 4A is an explanatory diagram illustrating an example of allocation of WPT blocks in radio resources (resource blocks) of a transmission signal including a WPT dummy signal transmitted from a base station.
  • FIG. 4B is an explanatory diagram showing an example of a spectrum on the frequency axis in OFDM secondary modulation of a transmission signal transmitted from a base station.
  • FIG. 5A is an explanatory diagram showing an example of arrangement of symbol points in QAM primary modulation of a communication signal transmitted from a base station.
  • FIG. 5B is an explanatory diagram showing an example of arrangement of symbol points in modulation of a WPT dummy signal transmitted from the base station.
  • FIG. 6 is a block diagram showing an example of the configuration of the measurement system according to the embodiment.
  • FIG. 7 is a graph showing an example of DC output characteristics calculated when a continuous wave of a WPT dummy signal is input to the rectifier circuit to be measured and when a measurement modulated wave is input.
  • FIG. 8 is an explanatory diagram showing an example of a pulse modulated wave that can be used as a modulated wave for measurement.
  • FIG. 9 is a graph showing an example of DC output characteristics calculated when a continuous wave of a WPT dummy signal is input to the rectifier circuit to be measured and when a pulse modulated wave is input as a measurement modulated wave.
  • FIG. 10 is a block diagram showing another example of the configuration of the measurement system according to the embodiment.
  • Figure 11 shows the relationship between the reflectance of the rectifier circuit and the resistance of the load calculated when a continuous wave of a WPT dummy signal is input to the rectifier circuit to be measured and when a pulse modulated wave is input as the measurement modulated wave. It is a graph showing an example.
  • the system using the rectifier circuit as the RF-DC conversion device to be measured by the measurement system is a system capable of wireless power transmission (WPT) from a mobile communication base station to a terminal device to be powered (e.g., a mobile communication UE (mobile station) or an IoT device).
  • This system is a power transmission system that effectively utilizes unused wireless resources (resource blocks) that are not used for communication among a plurality of wireless resources (resource blocks) set in a wireless frame of a downlink to a terminal device such as a UE, which is a power receiving device having a rectifier circuit, for wireless power transmission (WPT) to the terminal device.
  • the power transmission system may be a wireless communication system between a base station and a terminal device having a wireless power transmission (WPT) function from the base station to the terminal device.
  • the system according to the embodiment may also be a wireless power transmission (WPT) system from a base station to a terminal device having a wireless communication function between the base station and the terminal device.
  • WPT wireless power transmission
  • the measurement system of this embodiment is a measurement system that measures the characteristics of a rectifier circuit provided in a power receiving side device such as a terminal device of a wireless power transmission system (hereinafter also referred to as "WPT system"). It is possible to measure the characteristics of a rectifier circuit at the time of high power input to which a power transmission wave signal is input without damage.
  • WPT system wireless power transmission system
  • FIG. 1 is an explanatory diagram showing an example of a schematic configuration of a WPT system that can transmit power from a base station to a terminal device that has a rectifier circuit whose characteristics can be measured with the measurement system according to the present embodiment.
  • the WPT system connects to a cellular base station 10 forming a communication area (cell) 10A, and is capable of wireless communication with the base station 10 by connecting to the base station 10 when located in the communication area 10A.
  • a power supply target terminal device hereinafter also referred to as "UE" (user equipment)
  • the base station 10 also functions as a power transmitting side device in the WPT system, and the terminal device 20 also functions as a power receiving side device.
  • the UE 20 may be a mobile station of a mobile communication system, or may be a combination of a communication device (for example, a mobile communication module) and various devices.
  • the UE 20 includes, for example, an array antenna having a plurality of antenna elements.
  • the UE 20 may be an IoT device (also referred to as "IoT equipment").
  • a base station 10 is equipped with a plurality of array antennas 110 having a large number of antenna elements, and can perform communication using a massive MIMO (hereinafter also referred to as "mMIMO") transmission method with a plurality of UEs 20.
  • mMIMO is a wireless transmission technology that achieves high-capacity, high-speed communication by transmitting and receiving data using the array antenna 110.
  • communication can be performed using an MU (Multi User)-MIMO transmission method that performs beamforming to form beams 10B in time division or simultaneously for each of the plurality of UEs 20.
  • MU Multi User
  • a part of the communication area 10A is a wireless power transmission area (hereinafter referred to as "WPT area") 10A' where wireless power transmission is performed from the base station 10 to the terminal device 20.
  • the WPT area 10A' may be a smaller area than the communication area 10A as shown in the figure, or may be an area having the same or approximately the same size and position as the communication area 10A.
  • unused radio resources that are not used for communication among resource blocks that are a plurality of radio resources (time/frequency resources) constituting a downlink radio frame from the base station 10 are ) is used as a wireless power transmission block.
  • the base station 10 sends a dummy signal for wireless power transmission (hereinafter also referred to as "WPT dummy signal") to a wireless power transmission block (WPT block), which is a wireless resource that is not used for communication. ) is generated and transmitted to the UE 20.
  • WPT dummy signal a dummy signal for wireless power transmission
  • WPT block wireless power transmission block
  • a technology called lean carrier has been proposed in which the minimum necessary reference signals (RS) and control signals are placed on only some of the subcarriers of a radio frame, and it is expected that the unused radio resources in the radio frame can be effectively utilized to transmit wireless power to UE 20.
  • RS minimum necessary reference signals
  • control signals are placed on only some of the subcarriers of a radio frame, and it is expected that the unused radio resources in the radio frame can be effectively utilized to transmit wireless power to UE 20.
  • the radio waves of communication signals transmitted and received between the base station 10 and the UE 20 and the radio waves of the transmission signal to which the WPT dummy signal is assigned are transmitted from the base station 10 to the UE 20, for example, are millimeter waves or microwaves.
  • FIG. 2 is an explanatory diagram showing an example of power feeding to each UE by beamforming from the base station 10 of the WPT system to a plurality of UEs 20.
  • a plurality of UEs 20(1) to 20(3) are located in a WPT area 10A' (see FIG. 1 described above) within a communication area 10A, and a beam formed by each UE is provided.
  • Power may be supplied to each UE 20(1) to 20(3) via 10B(1) to 10B(3).
  • the beams 10B(1) to 10B(3) may be formed, for example, by being switched in a time-division manner.
  • FIG. 3 is a block diagram illustrating an example of the main configurations of the base station 10 and terminal equipment (UE) 20 that configure the WPT system.
  • the base station 10 includes a base station device 100 and an antenna 110.
  • the antenna 110 is, for example, an array antenna having a large number of antenna elements as shown in FIG.
  • the antenna 110 may be singular or plural.
  • a plurality of antennas 110 may be arranged corresponding to a plurality of sector cells.
  • the base station device 100 includes a communication signal processing section 120 and a wireless processing section 130.
  • the communication signal processing unit 120 processes signals such as various user data and control information transmitted and received with the UE 20.
  • the communication signal processing unit 120 During downlink communication to the UE 20, the communication signal processing unit 120 generates a downlink transmission signal including a WPT dummy signal using an unused radio resource that is not used for communication among a plurality of radio resources. generate.
  • the WPT dummy signal can be generated by modulating with a modulation method that has a smaller PAPR (peak power to average power ratio) (also referred to as "wave height ratio”) than the communication signal.
  • PAPR peak power to average power ratio
  • the WPT dummy signal may be a modulated signal that is modulated using a Zadoff-Chu sequence code and has a constant amplitude and a phase that changes over time, or may be a modulated signal that is modulated using a Zadoff-Chu code, and may be a modulated signal that has a constant amplitude and a phase that changes over time.
  • the signal may be a signal modulated at a plurality of symbol points having the maximum amplitude or near the maximum amplitude.
  • the transmission signal generation uses primary modulation such as QAM (quadrature amplitude modulation) for communication signals and modulation with small PAPR for WPT dummy signals, and secondary modulation such as OFDM (orthogonal frequency division multiplexing) modulation. May include.
  • QAM quadrature amplitude modulation
  • OFDM orthogonal frequency division multiplexing
  • the radio processing unit 130 transmits the transmission signal generated by the communication signal processing unit 120 from the antenna 110 to the UE 20, and outputs the reception signal received from the UE 20 via the antenna 110 to the communication signal processing unit 120.
  • the process of including a dummy signal for WPT using unused radio resources in the transmission signal for downlink communication to UE 20, and the generation of a trigger signal used for signal separation and signal synthesis, etc., described below, may be performed based on subframes that constitute the radio frame of mobile communication.
  • the base station 10 may autonomously perform the process of including a WPT dummy signal using unused radio resources in the transmission signal of the downlink communication to the UE 20, or the process may be performed by the base station 10 autonomously, or upon request or instruction from the UE 20, or It may also be performed based on a request or instruction from an external platform (eg, server, cloud system).
  • an external platform eg, server, cloud system
  • the wireless processing unit 130 controls one or more beams formed by the array antenna 110 based on the BF control signal. Furthermore, the radio processing unit 130 transmits a downlink transmission signal including the WPT dummy signal generated by the communication signal processing unit 120 to the UE 20 via the antenna 110.
  • the base station 10 performs beamforming (BF) control to form individual beams 10B for each UE 20 or for each UE group in the target area to which a plurality of UEs 20 belong.
  • Wireless power transfer may be performed separately or for each UE group.
  • BF control for each UE 20 or for each UE group may be performed by digital BF control in the frequency domain in the communication signal processing section 120, or by analog BF control in the radio processing section 130.
  • the UE 20 includes an antenna 210, a wireless processing section 220, a communication signal processing section 230, a power output section 240, and a battery 250.
  • Antenna 210 is, for example, a small array antenna having a plurality of antenna elements.
  • the wireless processing unit 220 transmits transmission signals such as feedback information and user data generated by the communication signal processing unit 230 from the antenna 210 to the base station 10, and transmits received signals received from the base station 10 via the antenna 210 to communication. It is also output to the signal processing section 230.
  • the wireless processing unit 220 receives a transmission signal including a WPT dummy signal transmitted from the base station 10.
  • the power output unit 240 also includes a rectifier circuit (rectifier) 241 as, for example, an RF-DC converter, and uses the power of the received signal received from the base station 10 to charge the battery. Output as received power for use.
  • the battery 250 can be charged by the received power output from the power output unit 240.
  • FIG. 4A is an explanatory diagram showing an example of allocation of WPT blocks in radio resources (resource blocks) of transmission signals including WPT dummy signals transmitted from the base station 10 of the WPT system.
  • FIG. 4B is an explanatory diagram showing an example of a spectrum on the frequency axis in OFDM secondary modulation of a transmission signal transmitted from the base station 10.
  • multiple radio resources used in downlink communication and uplink communication in the WPT system are multiple resource blocks 30 defined by subcarriers on the frequency axis and slots on the time axis. .
  • Each resource block 30 has subcarriers 33 of a predetermined bandwidth that are orthogonal to each other on the frequency axis, as shown in FIG. 4B.
  • the resource block 30 configuring the radio resource in FIG. 4A is allocated to a plurality of consecutive subframes configuring a radio frame for mobile communication.
  • each subframe is composed of a predetermined number (for example, 20) of resource blocks, including a communication subframe (hereinafter referred to as "communication frame”) F1 and a WPT subframe (hereinafter referred to as "WPT frame”). (referred to as "frame”) F2 are located alternately.
  • the communication frame F1 includes a resource block 31 for uplink and downlink communication
  • the WPT frame F2 includes a WPT resource block 32 that is cross-hatched in the figure.
  • a plurality of uplink resource blocks are allocated to uplink communication signals of user data and communication signals of WPT feedback information from the UE 20, and a plurality of downlink resource blocks are allocated to uplink communication signals of user data and communication signals of WPT feedback information from the UE 20. These resource blocks are allocated to signals for downlink communication of user data and information. Further, a downlink WPT signal is allocated to the resource block 32 of the WPT frame F2.
  • a PAPR peak power to average power ratio
  • OFDM orthogonal frequency division multiplexing
  • FIG. 5A is an explanatory diagram showing an example of the arrangement of symbol points 40 in QAM primary modulation of a transmission signal transmitted from the base station 10 of the WPT system.
  • FIG. 5A is a diagram of a constellation showing the arrangement of multiple symbol points (64-value symbol points) in the case of the 64QAM method, where the horizontal axis shows in-phase channel components and the vertical axis shows orthogonal channel components.
  • a WPT dummy signal modulated at any symbol point among the plurality of symbol points 40 of the QAM system can be used.
  • a WPT dummy signal modulated at one or more of the outermost symbol points 41 having the maximum amplitude among the plurality of QAM symbol points 40 may be used.
  • the transmission power to the terminal device such as the UE 20 can be maximized.
  • modulation may be performed at any symbol point other than the outermost symbol point.
  • the symbol point used for modulating the WPT dummy signal may be determined and selected based on the transmission power instructed by power control information included in the feedback information received from the terminal device such as the UE 20.
  • the WPT dummy signal is generated based on the power reception beam information (for example, beam direction and beam width information), information on the direction of arrival of WPT radio waves, remaining battery power information, etc. included in the power reception terminal information received from the terminal device 20 such as
  • the symbol points used for modulation may be determined and selected.
  • FIG. 5B is an explanatory diagram showing another example of the arrangement of symbol points in the primary modulation of the WPT dummy signal transmitted from the base station 10 of the WPT system.
  • a WPT dummy signal may be used that is composed of an OFDM modulated signal modulated at symbol points 42 whose phase changes with the amplitude constant over time.
  • the OFDM modulated signal at symbol point 42 in FIG. 5B can be generated using, for example, a Zadoff-Chu sequence code.
  • the transmission power to the terminal device such as the UE 20 can be maximized.
  • the rectifier circuit is damaged by using a measurement modulation wave signal whose power is smaller than the WPT dummy signal, which is a high-power power transmission wave signal actually used in the WPT system.
  • the high power characteristics of the rectifier circuit are measured without
  • FIG. 6 is a block diagram showing an example of the configuration of the measurement system 50 according to the present embodiment.
  • the measurement system 50 includes a measurement modulated wave input device 510, a smoothing element 520, and a DC characteristic measurement device 530.
  • the measurement modulated wave input device 510 functions as an input unit that generates a measurement modulated wave signal and inputs it to the rectifier circuit 241 to be measured.
  • the smoothing element 520 is composed of a capacitor or the like, and functions as a smoothing section that smoothes the pulsating current component remaining in the output signal output from the rectifier circuit 241.
  • the smoothing element 520 may be the same element as the smoothing element mounted on the power output section 240 of the terminal device 20 or an element having a similar function.
  • the DC characteristic measuring device 530 stores a mapping F from the output characteristic fm(v) when the measurement modulated wave is input to the rectifier circuit 241 to the output characteristic fc(v) when the power transmission wave is input (high power input). Functions as a storage unit.
  • FIG. 7 is a graph showing an example of DC output characteristics calculated when a continuous wave of a WPT dummy signal is input to the rectifier circuit 241 to be measured and when a measurement modulated wave is input.
  • the output characteristic fc(v) when a power transmission wave is input is, as shown by curve C101 in FIG.
  • This is a DC output characteristic showing the relationship between the voltage v and current i of the DC output signal from the rectifier circuit 241 when a power transmission wave is input assuming a case where the power transmission wave is input.
  • the output characteristic fm(v) when the measurement modulation wave is input is a measurement modulation wave signal (hereinafter also referred to as "measurement modulation signal”) whose power is smaller than the power transmission wave.
  • This is a DC output characteristic showing the relationship between the voltage v and current i of the DC output signal from the rectifier circuit 241 when a measurement modulated wave is inputted to the rectifier circuit 241, assuming that the signal is input to the rectifier circuit 241.
  • the output characteristic fc (v) when the power transmission wave is input, the output characteristic fm (v) when the measurement modulated wave is input, and the mapping F are information about the power transmission wave, the measurement modulation wave, and the circuit configuration of the rectifier circuit 241. can be calculated and determined in advance using computer simulation.
  • the DC characteristic measuring device 530 also functions as a measurement unit that measures the DC characteristics of the output signal outputted via the smoothing element 520 from the rectifier circuit 241 into which the measurement modulated wave signal is input.
  • the DC characteristic measuring device 530 performs rectification at the time of high power input when a WPT dummy signal (power transmission wave signal) is input, based on the DC characteristic of the measured output signal and the predetermined mapping F. It also functions as an estimator that estimates the characteristics of the circuit 241.
  • FIG. 8 is an explanatory diagram showing an example of a pulse modulated wave 511 that can be used as a measurement modulated wave.
  • a pulse modulated wave 511 in FIG. 8 is a modulated wave obtained by pulse modulating a continuous wave power transmission wave at a predetermined duty ratio D.
  • the duty ratio D may be, for example, 10% or more and 50% or less.
  • Figure 9 is a graph showing an example of DC output characteristics calculated when a continuous wave of a WPT dummy signal is input to the rectifier circuit 241 under measurement, and when a pulse modulated wave with a duty ratio of D is input as the measurement modulated wave.
  • the information on the mapping F stored in the DC characteristic measuring device 530 includes information on this duty ratio D or information on its reciprocal.
  • FIG. 10 is a block diagram showing another example of the configuration of the measurement system 50 according to the embodiment.
  • the measurement system 50 includes a measurement modulated wave input to the rectifier circuit 241, a load 531 through which an output signal from the rectifier circuit 241 flows, or a control unit that controls both the measurement modulated wave and the load 531. Equipped with a control device. This control can improve the accuracy of measuring the characteristics of the rectifier circuit 241.
  • the relationship between the reflectance of the measurement modulated wave input from the measurement modulated wave input device 510 to the rectifier circuit 241 and the resistance of the load 531 for the output signal from the rectifier circuit 241 may be measured. Furthermore, the resistance of the load 531 at which the reflectance is minimized based on the measurement results may be determined as a matching condition, and the matching condition may be used to calibrate the measurement system, such as setting the resistance of the load 531 when measuring the DC characteristics of the output signal from the rectifier circuit 241.
  • Information on the reflectance of the modulated wave for measurement can be measured by the modulated wave input device for measurement 510 and passed to the DC characteristic measurement device 530, for example. Further, the resistance of the load 531 through which the output signal from the rectifier circuit 241 flows can be measured by, for example, the DC characteristic measuring device 530. Then, the DC characteristic measuring device 530 measures the relationship between the reflectance of the modulated wave for measurement and the resistance of the load 531, and based on the measurement result, the resistance of the load 531 where the reflectance is minimum is set to the rectifier circuit 241. This can be determined as a matching condition for the power output unit 240 included.
  • the power transmission wave is applied to the rectifier circuit 241 based on the mapping obtained in advance and the measurement result of the characteristic fm(R) of the load resistance r with respect to the reflectance when the signal of the modulated wave for measurement is input to the rectifier circuit 241. It is also possible to estimate the relationship between the reflectance and the resistance of the load when .
  • FIG. 11 shows the reflectance R of the rectifier circuit 241 and the resistance of the load 531 calculated when a continuous wave of the WPT dummy signal is input to the rectifier circuit 241 to be measured and when a pulse modulated wave is input as the measurement modulated wave. It is a graph showing an example of the relationship with r.
  • the characteristic fc(R) of the load resistance r with respect to the reflectance when a power transmission wave is input the characteristic fm(R) of the load resistance r with respect to the reflectance when a measurement modulated wave is input, and the mapping F are the power transmission wave
  • the measurement It can be calculated in advance using computer simulation based on the information on the modulated wave and the circuit configuration of the rectifier circuit 241.
  • the current-voltage output characteristic indicating the relationship between the DC current (i) and voltage (v) output from the rectifier circuit 241 is measured as the characteristic of the rectifier circuit when high power is input.
  • the present invention can also be applied to the case of measuring characteristics of the rectifier circuit 241 other than the DC current-voltage output characteristics.
  • the continuous wave of the WPT dummy signal it is not necessary to input the continuous wave of the WPT dummy signal to the rectifier circuit 241 for high power characteristic measurement, and the continuous wave of the WPT dummy signal can be inputted without damaging the rectifier circuit 241. It is possible to measure the characteristics of the rectifier circuit 241 when a high power input signal is input.
  • the present invention can provide a power supply infrastructure that can supply power to a large number of terminal devices 20 that can receive radio waves transmitted from a base station 10, thereby contributing to the achievement of Goal 9 of the Sustainable Development Goals (SDGs), which is to "build resilient infrastructure, promote inclusive and sustainable industrialization, and promote innovation and infrastructure.”
  • SDGs Sustainable Development Goals
  • processing steps and components of the measurement system, measurement modulated wave input device, DC characteristic measurement device, terminal device (UE, IoT device), base station, mobile station, relay device, and control device described in this specification can be implemented by various means.
  • these steps and components may be implemented in hardware, firmware, software, or a combination thereof.
  • the means such as the processing unit used may be one or more of an application specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processor (DSPD), a programmable logic device (PLD), a field programmable a gate array (FPGA), processor, controller, microcontroller, microprocessor, electronic device, other electronic unit, computer, or combination thereof designed to perform the functions described herein; It may be implemented inside.
  • ASIC application specific integrated circuit
  • DSP digital signal processor
  • DSPD digital signal processor
  • PLD programmable logic device
  • FPGA field programmable a gate array
  • the means used to implement the components described above may include programs (e.g., procedures, functions, modules, instructions) that perform the functions described herein. , etc.).
  • any computer/processor readable medium tangibly embodying firmware and/or software code such as a processing unit, may be used to implement the above steps and components described herein. It may be used for implementation.
  • the firmware and/or software code may be stored in memory and executed by a computer or processor, eg, in a controller.
  • the memory may be implemented within the computer or processor, or external to the processor.
  • the firmware and/or software code may also be stored in, for example, random access memory (RAM), read-only memory (ROM), non-volatile random access memory (NVRAM), programmable read-only memory (PROM), electrically erasable PROM (EEPROM), etc. ), flash memory, floppy disks, compact disks (CDs), digital versatile disks (DVDs), magnetic or optical data storage devices, etc. good.
  • RAM random access memory
  • ROM read-only memory
  • NVRAM non-volatile random access memory
  • PROM programmable read-only memory
  • EEPROM electrically erasable PROM
  • flash memory floppy disks
  • CDs compact disks
  • DVDs digital versatile disks
  • magnetic or optical data storage devices etc. good.
  • the code may be executed by one or more computers or processors and may cause the computers or processors to perform certain aspects of the functionality described herein.
  • the medium may be a non-temporary recording medium.
  • the code of the program may be read and executed by a computer, processor, or other device or apparatus, and its format is not limited to a specific format.
  • the code of the program may be a source code, an object code, or a binary code, or may be a mixture of two or more of these codes.
  • Base station 10A Communication area 10A': WPT area 10B: Beam 20: Terminal device 50: Measurement system 100: Base station device 110: Antenna 120: Communication signal processing section 130: Radio processing section 210: Antenna 220: Radio processing Section 230: Communication signal processing section 240: Power output section 241: Rectifier circuit 250: Battery 510: Modulated wave input device for measurement 511: Pulse modulated wave 520: Smoothing element 530: DC characteristic measuring device 531: Load

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Transmitters (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un système qui peut mesurer les caractéristiques d'un circuit redresseur installé dans un dispositif côté réception d'énergie pour la transmission d'énergie sans fil pendant une grande entrée d'énergie lorsqu'un signal d'onde de transmission d'énergie est appliqué en entrée, sans endommager le circuit redresseur. Le système comprend : une unité de stockage qui stocke un mappage entre des caractéristiques lorsqu'une onde modulée de mesure est appliquée en entrée et des caractéristiques lorsqu'une onde de transmission d'énergie est appliquée en entrée, qui est déterminé sur la base des caractéristiques lorsque l'onde de transmission d'énergie est appliquée en entrée en supposant qu'un signal d'onde de transmission d'énergie utilisé pour la transmission d'énergie sans fil est appliqué à l'entrée d'un circuit redresseur et des caractéristiques lorsque l'onde modulée de mesure est appliquée en entrée en supposant qu'un signal d'onde de modulation de mesure ayant une énergie inférieure à celle de l'onde de transmission d'énergie est appliqué à l'entrée du circuit redresseur; une unité d'entrée qui génère un signal d'onde modulée de mesure et applique le signal d'onde modulée de mesure généré à l'entrée du circuit redresseur; une unité de mesure qui mesure des caractéristiques CC d'un signal de sortie délivré par le circuit redresseur à l'entrée duquel le signal d'onde modulée de mesure est appliqué; et une unité d'estimation qui estime des caractéristiques du circuit redresseur lorsque le signal d'onde de transmission d'énergie est appliqué en entrée sur la base des caractéristiques CC du signal de sortie et du mappage.
PCT/JP2023/005370 2022-09-22 2023-02-16 Système, procédé et programme permettant de mesurer des caractéristiques d'un circuit redresseur pour la transmission d'énergie sans fil WO2024062647A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022151890A JP7281593B1 (ja) 2022-09-22 2022-09-22 無線電力伝送用の整流回路の特性を測定するシステム、方法及びプログラム
JP2022-151890 2022-09-22

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017164220A1 (fr) * 2016-03-25 2017-09-28 株式会社Ｎｔｔドコモ Terminal d'utilisateur, station de base sans fil, et procédé de communication sans fil
WO2020026412A1 (fr) * 2018-08-02 2020-02-06 マクセル株式会社 Dispositif de terminal radio et dispositif d'alimentation de puissance radio

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017164220A1 (fr) * 2016-03-25 2017-09-28 株式会社Ｎｔｔドコモ Terminal d'utilisateur, station de base sans fil, et procédé de communication sans fil
WO2020026412A1 (fr) * 2018-08-02 2020-02-06 マクセル株式会社 Dispositif de terminal radio et dispositif d'alimentation de puissance radio

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