WO2023181360A1 - Rectenna device - Google Patents

Rectenna device Download PDF

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Publication number
WO2023181360A1
WO2023181360A1 PCT/JP2022/014430 JP2022014430W WO2023181360A1 WO 2023181360 A1 WO2023181360 A1 WO 2023181360A1 JP 2022014430 W JP2022014430 W JP 2022014430W WO 2023181360 A1 WO2023181360 A1 WO 2023181360A1
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WIPO (PCT)
Prior art keywords
circuit
output voltage
circuits
power conversion
rectifier
Prior art date
Application number
PCT/JP2022/014430
Other languages
French (fr)
Japanese (ja)
Inventor
将司 ▲高▼橋
和裕 ▲高▼橋
一義 花房
Original Assignee
Tdk株式会社
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Application filed by Tdk株式会社 filed Critical Tdk株式会社
Priority to PCT/JP2022/014430 priority Critical patent/WO2023181360A1/en
Publication of WO2023181360A1 publication Critical patent/WO2023181360A1/en

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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
    • H02J50/27—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas
    • 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

Definitions

  • the present invention relates to a rectenna device used for wireless power transmission using microwaves.
  • Patent Document 1 discloses a technique in which power received by an antenna is distributed to a plurality of rectifier circuits via a transmission line in a rectenna device that receives microwaves.
  • a rectenna device includes an antenna section, a plurality of rectifier circuits, a plurality of power conversion circuits, a power output terminal, and a plurality of correction control circuits.
  • the antenna section is configured to be able to receive microwaves.
  • Each of the plurality of rectifier circuits is connected to the antenna section and configured to be able to rectify the power signal supplied from the antenna section.
  • the plurality of power conversion circuits are provided corresponding to the plurality of rectifier circuits, respectively, and each is configured to be able to generate DC power based on the output power of the corresponding rectifier circuit.
  • the power output terminal is connected to output terminals of the plurality of power conversion circuits.
  • the plurality of correction control circuits are provided corresponding to the plurality of rectifier circuits, respectively, and are provided corresponding to the plurality of power conversion circuits, and each corrects the output voltage, output current, and circuit of the corresponding rectifier circuit.
  • the output voltage of the corresponding power conversion circuit can be corrected based on one or more of the temperatures.
  • circuit components can be protected.
  • FIG. 1 is a block diagram illustrating a configuration example of a rectenna device according to an embodiment of the present invention.
  • FIG. 2 is a circuit diagram showing a configuration example of the rectifier circuit shown in FIG. 1.
  • FIG. FIG. 2 is a circuit diagram showing another configuration example of the rectifier circuit shown in FIG. 1.
  • FIG. FIG. 2 is a circuit diagram showing another configuration example of the rectifier circuit shown in FIG. 1.
  • FIG. FIG. 2 is a circuit diagram illustrating a configuration example of a rectifier circuit, a sensor circuit, a correction control circuit, and a DC/DC converter illustrated in FIG. 1.
  • FIG. FIG. 2 is an explanatory diagram showing an example of mounting the rectenna device shown in FIG. 1;
  • FIG. 2 is an explanatory diagram showing an example of mounting the rectenna device shown in FIG. 1;
  • FIG. 1 is a block diagram illustrating a configuration example of a rectenna device according to an embodiment of the present invention.
  • FIG. 2 is
  • FIG. 2 is another explanatory diagram showing an example of mounting the rectenna device shown in FIG. 1;
  • 2 is a characteristic diagram showing an example of the operation of the rectenna device shown in FIG. 1.
  • FIG. 2 is a characteristic diagram showing an example of the characteristics of the rectifier circuit shown in FIG. 1.
  • FIG. 2 is a characteristic diagram showing another example of the operation of the rectenna device shown in FIG. 1.
  • FIG. 2 is a characteristic diagram showing another example of the operation of the rectenna device shown in FIG. 1.
  • FIG. FIG. 2 is a characteristic diagram showing another example of the characteristics of the rectifier circuit shown in FIG. 1;
  • It is a block diagram showing one example of composition of a rectenna device concerning a modification.
  • FIG. 15 is an explanatory diagram showing an example of mounting the rectenna device shown in FIG. 14.
  • FIG. 15 is another explanatory diagram showing an example of mounting the rectenna device shown in FIG. 14.
  • FIG. 15 is another explanatory diagram showing an example of mounting the rectenna device shown in FIG. 14.
  • FIG. 1 shows an example of the configuration of a rectenna device (rectenna device 1) according to a first embodiment of the present invention.
  • the rectenna device 1 is a power receiving device used in a wireless power transmission system that transmits power using microwaves.
  • the rectenna device 1 is configured to generate DC power based on the power transmitted by microwaves, and to supply the generated DC power to the load device 9.
  • the rectenna device 1 includes an antenna unit 10, a plurality of rectifier circuits 12 (four rectifier circuits 12A to 12D in this example), a plurality of sensor circuits 13 (four sensor circuits 13A to 13D in this example), and a plurality of rectifier circuits 12 (four rectifier circuits 12A to 12D in this example).
  • a correction control circuit 14 (four correction control circuits 14A to 14D in this example), a plurality of DC/DC converters 15 (four DC/DC converters 15A to 15D in this example), a converter control circuit 16, and a power output It is equipped with a terminal T.
  • the antenna section 10 is configured to receive microwaves.
  • the antenna section 10 has a plurality of antennas 11 (four antennas 11A to 11D in this example). Each of the antennas 11A to 11D can be configured using, for example, a patch antenna. Output terminals of antennas 11A to 11D are connected to each other and to input terminals of rectifier circuits 12A to 12D.
  • the rectifier circuit 12A is connected to the antenna section 10 and is configured to rectify the power signal supplied from the antenna section 10.
  • the rectifier circuit 12B is connected to the antenna section 10 and configured to rectify the power signal supplied from the antenna section 10.
  • the rectifier circuit 12C is connected to the antenna section 10 and is configured to rectify the power signal supplied from the antenna section 10.
  • the rectifier circuit 12D is connected to the antenna section 10 and is configured to rectify the power signal supplied from the antenna section 10.
  • the input terminals of the rectifier circuits 12A to 12D are connected to each other and to the output terminals of the antennas 11A to 11D of the antenna section 10.
  • FIG. 2 shows an example of the configuration of the rectifier circuit 12.
  • the antenna section 10 at the front stage is connected to the left of the rectifier circuit 12, and the sensor circuit 13 at the rear stage is connected to the right of the rectifier circuit 12.
  • This rectifier circuit 12 is a so-called single shunt type rectifier circuit, and includes a diode D1, a transmission line TL, and a capacitor C1.
  • the voltage line L1 and the reference voltage line L2 are guided to the antenna 11 at the front stage and to the sensor circuit 13 at the rear stage.
  • the anode of the diode D1 is connected to the reference voltage line L2, and the cathode is connected to one end of the transmission line TL in the voltage line L1.
  • the transmission line TL is a transmission line with a line length of ⁇ /4, is provided on the voltage line L1, has one end connected to the cathode of the diode D1, and has the other end connected to one end of the capacitor C1.
  • One end of the capacitor C1 is connected to the other end of the transmission line TL on the voltage line L1, and the other end is connected to the reference voltage line L2.
  • FIG. 3 shows a configuration example of another rectifier circuit 12.
  • the rectifier circuit 12 is a so-called half-wave voltage doubler type rectifier circuit, and includes a capacitor C2, a diode D1, a diode D2, and a capacitor C1.
  • Capacitor C2 is provided on voltage line L1, one end is connected to the preceding antenna section 10, and the other end is connected to the cathode of diode D1 and the anode of diode D2.
  • the anode of diode D1 is connected to reference voltage line L2, and the cathode is connected to the other end of capacitor C2 and the anode of diode D2 on voltage line L1.
  • Diode D2 is provided on voltage line L1, its anode is connected to the other end of capacitor C2 and the cathode of diode D1, and its cathode is connected to one end of capacitor C1.
  • One end of the capacitor C1 is connected to the cathode of the diode D2 on the voltage line L1, and the other end is connected to the reference voltage line L2.
  • FIG. 4 shows a configuration example of another rectifier circuit 12.
  • This rectifier circuit 12 is a so-called full-wave rectifier type rectifier circuit, and includes diodes D3 to D6 and a capacitor C1.
  • the voltage line L1 and the reference voltage line L3 are led to the antenna section 10 at the front stage, and the voltage line L1 and the reference voltage line L2 are led to the sensor circuit 13 at the rear stage.
  • the anode of diode D3 is connected to reference voltage line L2, and the cathode is connected to the anode of diode D4 on voltage line L1.
  • Diode D4 is provided on voltage line L1, has an anode connected to the cathode of diode D3, and a cathode connected to the cathode of diode D6 and one end of capacitor C1.
  • the anode of the diode D5 is connected to the reference voltage line L2, and the cathode is connected to the reference voltage line L3.
  • the anode of diode D6 is connected to reference voltage line L3, and the cathode is connected to voltage line L1 to the cathode of diode D4 and one end of capacitor C1.
  • One end of the capacitor C1 is connected to the cathodes of diodes D4 and D6 on the voltage line L1, and the other end is connected to the reference voltage line L2.
  • the rectifier circuit 12 for example, the circuits shown in FIGS. 2 to 4 can be used. Note that the circuit is not limited to these, and other circuits may be used.
  • the rectifier circuit 12 has a temperature sensor that detects the circuit temperature of the rectifier circuit 12, as described later.
  • the rectifier circuits 12A to 12D are configured to supply the detection results of the temperature sensors to the correction control circuits 14A to 14D, respectively.
  • the four sensor circuits 13A to 13D are provided corresponding to the four rectifier circuits 12A to 12D, respectively.
  • the sensor circuit 13A is configured to detect the output voltage of the rectifier circuit 12A (output voltage Vo_rect described later) and the output current of the rectifier circuit 12A (output current Io_rect described later), and supply the detection results to the correction control circuit 14A. be done.
  • the sensor circuit 13B is configured to detect the output voltage and output current of the rectifier circuit 12B, and supply the detection results to the correction control circuit 14B.
  • the sensor circuit 13C is configured to detect the output voltage and output current of the rectifier circuit 12C, and supply the detection results to the correction control circuit 14C.
  • the sensor circuit 13D is configured to detect the output voltage and output current of the rectifier circuit 12D, and supply the detection results to the correction control circuit 14D.
  • the correction control circuit 14A adjusts the output of the DC/DC converter 15A based on the detection results of the output voltage and output current of the rectifier circuit 12A supplied from the sensor circuit 13A and the detection result of the circuit temperature supplied from the rectifier circuit 12A. It is configured to generate a correction command value indicating the amount of correction of the voltage (output voltage Vo_dcdc described later).
  • the correction control circuit 14B adjusts the amount of correction for the output voltage of the DC/DC converter 15B based on the detection results of the output voltage and output current supplied from the sensor circuit 13B and the detection result of the circuit temperature supplied from the rectifier circuit 12B.
  • the correction command value is configured to generate a correction command value indicating.
  • the correction control circuit 14C adjusts the output of the DC/DC converter 15C based on the output voltage and output current of the rectifier circuit 12C supplied from the sensor circuit 13C and the detection result of the circuit temperature supplied from the rectifier circuit 12C. It is configured to generate a correction command value indicating a voltage correction amount.
  • the correction control circuit 14D adjusts the output of the DC/DC converter 15D based on the detection results of the output voltage and output current of the rectifier circuit 12D supplied from the sensor circuit 13D and the detection result of the circuit temperature supplied from the rectifier circuit 12D. It is configured to generate a correction command value indicating a voltage correction amount.
  • the four DC/DC converters 15A to 15D are provided corresponding to the four rectifier circuits 12A to 12D, the four sensor circuits 13A to 13D, and the four correction control circuits 14A to 14D, respectively.
  • the DC/DC converter 15A is configured to generate DC power based on the output power of the rectifier circuit 12A, and to correct the output voltage based on the correction command value supplied from the correction control circuit 14A.
  • the DC/DC converter 15B is configured to generate DC power based on the output power of the rectifier circuit 12B, and to correct the output voltage based on the correction command value supplied from the correction control circuit 14B. .
  • the DC/DC converter 15C is configured to generate DC power based on the output power of the rectifier circuit 12C, and to correct the output voltage based on the correction command value supplied from the correction control circuit 14C.
  • the DC/DC converter 15D is configured to generate DC power based on the output power of the rectifier circuit 12D, and to correct the output voltage based on the correction command value supplied from the correction control circuit 14D.
  • the output terminals of the four DC/DC converters 15A to 15D are connected to each other and to the power output terminal T.
  • the converter control circuit 16 is configured to control the operations of the four DC/DC converters 15A to 15D. Specifically, the converter control circuit 16 controls the four DC/DC converters 15A to 15D so that, for example, the four DC/DC converters 15A to 15D perform switching operations at the same switching frequency and different phases. Controls the operation of 15D.
  • the four DC/DC converters 15A to 15D perform switching operations at the same switching frequency, for example, when a noise reduction filter is provided between the rectenna device 1 and the load device 9, this filter Noise caused by switching operations can be easily reduced. Further, by performing switching operations in different phases of the four DC/DC converters 15A to 15D, ripples in the output voltage of the rectenna device 1 can be reduced.
  • the power output terminal T is a terminal that outputs the power generated by the four DC/DC converters 15A to 15D, and is connected to the load device 9.
  • FIG. 5 shows an example of the configuration of the rectifier circuit 12A, the sensor circuit 13A, the correction control circuit 14A, and the DC/DC converter 15A.
  • the rectifier circuit 12A has a temperature sensor 19.
  • the temperature sensor 19 is configured to detect the circuit temperature T_rect of the rectifier circuit 12A.
  • Temperature sensor 19 is constructed using, for example, a thermistor, and is placed, for example, near the diode shown in FIGS. 2-4.
  • the temperature sensor 19 is configured to generate a detection voltage according to the circuit temperature T_rect of the rectifier circuit 12A.
  • the sensor circuit 13A includes resistance elements 21 and 22 and a current sensor 23.
  • the resistive elements 21 and 22 constitute a resistive voltage divider circuit, and are configured to divide the output voltage Vo_rect of the rectifier circuit 12A to generate a detection voltage according to the output voltage Vo_rect.
  • the current sensor 23 is provided on the voltage line L1, and is configured to detect the output current Io_rect of the rectifier circuit 12A flowing from the rectifier circuit 12A toward the DC/DC converter 15A, and to generate a detection voltage according to this output current Io_rect. It is composed of
  • the correction control circuit 14A has correction command value generation circuits 26 to 28.
  • the DC/DC converter 15A includes a capacitor 31, transistors 32 and 33, an inductor 34, resistance elements 35 and 36, a capacitor 37, a voltage command value generation circuit 38, an addition circuit 39, and a voltage generation circuit 41. , an operational amplifier circuit 42, a resistance element 43, capacitors 44, 45, and a controller 46.
  • One end of the capacitor 31 is connected to the voltage line L1, and the other end is connected to the reference voltage line L2.
  • the transistors 32 and 33 are configured using, for example, N-type field effect transistors (FETs). Each of transistors 32, 33 has a diode having an anode connected to a source and a cathode connected to a drain. Note that although an N-type field effect transistor is used in this example, any switching element may be used.
  • the gate signal G1 is supplied to the gate of the transistor 32, the drain is connected to the voltage line L1, and the source is connected to the voltage line L4.
  • the gate signal G2 is supplied to the gate of the transistor 33, the drain is connected to the voltage line L4, and the source is connected to the reference voltage line L2.
  • the inductor 34 is provided on the voltage line L4, one end is connected to the source of the transistor 32 and the drain of the transistor 33, and the other end is connected to one end of the resistive element 35 and one end of the capacitor 37.
  • the resistive elements 35 and 36 constitute a resistive voltage divider circuit, and are configured to divide the output voltage Vo_dcdc of the DC/DC converter 15 to generate a detection voltage according to the output voltage Vo_dcdc.
  • One end of the capacitor 37 is connected to the voltage line L4, and the other end is connected to the reference voltage line L2.
  • the voltage command value generation circuit 38 is configured to generate a voltage command value Vref indicating a reference voltage of the output voltage Vo_dcdc of the DC/DC converter 15A.
  • the voltage generation circuit 41 is configured to generate the voltage Vvr based on the voltage command value Vref1 of the target voltage.
  • a voltage Vvr is supplied to the positive input terminal of the operational amplifier circuit 42, and a detection voltage corresponding to the output voltage Vo_dcdc, which is divided by the resistive elements 35 and 36, is supplied to the negative input terminal.
  • One end of the resistive element 43 is connected to the negative input terminal of the operational amplifier circuit 42, and the other end is connected to one end of the capacitor 44.
  • One end of the capacitor 44 is connected to the other end of the resistance element 43, and the other end is connected to the output terminal of the operational amplifier circuit 42.
  • One end of the capacitor 44 is connected to the negative input terminal of the operational amplifier circuit 42, and the other end is connected to the output terminal of the operational amplifier circuit 42.
  • the operational amplifier circuit 42 generates a control voltage and supplies this control voltage to the controller 46.
  • the controller 46 is configured to control the operation of the DC/DC converter 15A based on the control voltage supplied from the operational amplifier circuit 42. Specifically, the controller 46 generates gate signals G1 and G2 based on the control voltage supplied from the operational amplifier circuit 42, and controls the switching operations of the transistors 32 and 33 using the gate signals G1 and G2. Accordingly, the output voltage Vo_dcdc of the DC/DC converter 15A is controlled to become the target voltage.
  • the controller 46 is configured using, for example, an MCU (Micro Controller Unit).
  • FIG. 6 and 7 represent implementation examples of four antennas 11, four rectifier circuits 12, four sensor circuits 13, four correction control circuits 14, and four DC/DC converters 15 in the rectenna device 1.
  • Four antennas 11, four rectifier circuits 12, four sensor circuits 13, four correction control circuits 14, and four DC/DC converters 15 are mounted on a substrate 100, which is a printed circuit board in this example.
  • FIG. 6 shows a substrate side 100A of the substrate 100
  • FIG. 7 shows a substrate side 100B of the substrate 100 opposite to the substrate side 100A.
  • four antennas 11 are mounted on the substrate surface 100A, and four rectifier circuits 12, four sensor circuits 13, four correction control circuits 14, and four DC/DC converters 15 are mounted on the substrate surface 100B. Ru.
  • the four antennas 11 are arranged in two rows and two columns in this example.
  • the four antennas 11 are connected to each other via a transmission line 102 and guided to a feeding point 101.
  • the transmission line 102 combines the power output from each of the four antennas 11 and supplies the combined power to the feed point 101 .
  • a transmission line 102 arranged on the substrate surface 100A and a transmission line 103 arranged on the substrate surface 100B are connected to each other via a via (not shown) provided in the substrate 100.
  • the four rectifier circuits 12 are connected to each other via a transmission line 103 and guided to a feeding point 101.
  • power supplied from four antennas 11 is distributed by this transmission line 103 and supplied to four rectifier circuits 12A to 12D.
  • Transmission line 103 distributes power so that the power supplied to four rectifier circuits 12A to 12D is equal to each other.
  • the transmission line from the feed point 101 to the rectifier circuit 12A and the transmission line from the feed point 101 to the rectifier circuit 12C have shapes that are symmetrical to each other.
  • the transmission line from the feed point 101 to the rectifier circuit 12B and the transmission line from the feed point 101 to the rectifier circuit 12D have mutually symmetrical shapes.
  • the rectifier circuit 12 is configured as one circuit
  • the sensor circuit 13 and the correction control circuit 14 are configured as one circuit
  • the DC/DC converter 15 is configured as one circuit.
  • the rectifier circuit 12, the sensor circuit 13, the correction control circuit 14, and the DC/DC converter 15 may be configured as one circuit.
  • four antennas 11 are mounted on the substrate surface 100A, and four rectifier circuits 12, four sensor circuits 13, four correction control circuits 14, and four DC/DC converters 15 are mounted on the substrate surface 100B. Although implemented, it is not limited to this. Alternatively, for example, four antennas 11, four rectifier circuits 12, four sensor circuits 13, four correction control circuits 14, and four DC/DC converters 15 may be mounted on the same substrate surface. .
  • the antenna section 10 corresponds to a specific example of the "antenna section” in the present disclosure.
  • the antenna 11 corresponds to a specific example of "antenna” in the present disclosure.
  • the rectifier circuit 12 corresponds to a specific example of a “rectifier circuit” in the present disclosure.
  • the correction control circuit 14 corresponds to a specific example of a "correction control circuit” in the present disclosure.
  • the output voltage Vo_rect corresponds to a specific example of "output voltage of a rectifier circuit” in the present disclosure.
  • the output current Io_rect corresponds to a specific example of "output current” in the present disclosure.
  • the circuit temperature T_rect corresponds to a specific example of "circuit temperature” in the present disclosure.
  • the correction command value ⁇ Va corresponds to a specific example of the "first correction command value” in the present disclosure.
  • the correction command value ⁇ Vb corresponds to a specific example of the "second correction command value” in the present disclosure.
  • the correction command value ⁇ Vc corresponds to a specific example of the "third correction command value” in the present disclosure.
  • the DC/DC converter 15 corresponds to a specific example of a "power conversion circuit” in the present disclosure.
  • the output voltage Vo_dcdc corresponds to a specific example of "output voltage of the power conversion circuit” in the present disclosure.
  • Converter control circuit 16 corresponds to a specific example of a "power conversion control circuit” in the present disclosure.
  • the power output terminal T corresponds to a specific example of a "power output terminal” in the present disclosure.
  • Antenna section 10 receives microwaves.
  • the rectifier circuit 12A rectifies the power signal supplied from the antenna section 10. Further, the rectifier circuit 12A detects the circuit temperature T_rect of the rectifier circuit 12A, and supplies the detection result to the correction control circuit 14A.
  • the sensor circuit 13A detects the output voltage Vo_rect and the output current Io_rect of the rectifier circuit 12A, and supplies the detection results to the correction control circuit 14A.
  • the correction control circuit 14A controls the DC/DC converter based on the detection results of the output voltage Vo_rect and the output current Io_rect of the rectifier circuit 12A supplied from the sensor circuit 13A, and the detection result of the circuit temperature T_rect supplied from the rectification circuit 12A.
  • a correction command value indicating the correction amount of the output voltage Vo_dcdc of 15A is generated.
  • the DC/DC converter 15A generates DC power based on the output power of the rectifier circuit 12A, and corrects the output voltage Vo_dcdc of the DC/DC converter 15A based on the correction command value supplied from the correction control circuit 14A.
  • the converter control circuit 16 controls the operation of the four DC/DC converters 15A to 15D so that the four DC/DC converters 15A to 15D perform switching operations at the same switching frequency and different phases.
  • Rectenna device 1 supplies DC power generated by four DC/DC converters 15A to 15D to load device 9 via power output terminal T.
  • the power output from each of the antennas 11A to 11D is once combined, and the combined power is distributed to the four rectifier circuits 12A to 12D.
  • the four rectifier circuits 12A to 12D Due to variations in the characteristics of the paths to the four rectifier circuits 12A to 12D in the transmission line 103 or variations in the characteristics of the four rectifier circuits 12A to 12D, a large amount of current flows into one of the four rectifier circuits 12A to 12D. It can flow. For example, if an excessive current flows through any one of the rectifier circuits 12A to 12D, the characteristics of the diode in the rectifier circuit 12 may deteriorate or the diode may fail.
  • the correction control circuit 14A uses the detection results of the output voltage Vo_rect and output current Io_rect of the rectifier circuit 12A supplied from the sensor circuit 13A, and the detection result of the circuit temperature T_rect supplied from the rectifier circuit 12A. Based on this, a correction command value indicating the amount of correction of the output voltage Vo_dcdc of the DC/DC converter 15A is generated.
  • the DC/DC converter 15A corrects the output voltage based on the correction command value supplied from the correction control circuit 14A. Thereby, in the rectenna device 1, the diode of the rectifier circuit 12A can be protected. This operation will be explained in detail below.
  • FIG. 8 shows a correction operation of the output voltage Vo_dcdc of the DC/DC converter 15A based on the output voltage Vo_rect of the rectifier circuit 12A.
  • the correction command value generation circuit 26 uses equation EQ1 to generate a correction command value ⁇ Va based on the output voltage Vo_rect of the rectifier circuit 12A.
  • the addition circuit 39 generates the voltage command value Vref1 of the target voltage using equation EQ4.
  • the output voltage Vo_dcdc of the DC/DC converter 15A increases as the output voltage Vo_rect of the rectifier circuit 12A increases.
  • the DC/DC converter 15A sets the output voltage Vo_dcdc of the DC/DC converter 15A to the voltage Vo1
  • the output voltage Vo_rect of the rectifier circuit 12A becomes the voltage V1.
  • the output voltage Vo_dcdc of the DC/DC converter 15A is set to a voltage Vo2 higher than the voltage Vo1.
  • the rectenna device 1 can cooperatively supply DC power to the load device 9 while protecting the diode of the rectifier circuit 12A, as described below.
  • FIG. 9 shows characteristics showing the relationship between the output voltage Vo_rect and the output current Io_rect of the rectifier circuit 12A when the received power is a predetermined value.
  • Characteristic W1 shows the characteristic when the received power is power P1
  • characteristic W2 shows the characteristic when the received power is power P2 which is larger than power P1
  • characteristic W3 shows the characteristic when the received power is power P2 which is larger than power P1. The characteristics when the power is small P3 are shown.
  • the output current Io_rect of the rectifier circuit 12A when the output voltage Vo_rect of the rectifier circuit 12A is low, the output current Io_rect of the rectifier circuit 12A is large.
  • the diodes of the rectifier circuit 12A have little margin in terms of current capacity. For example, if the output current Io_rect is excessive, the characteristics of the diode in the rectifier circuit 12A may deteriorate or the diode may fail. Therefore, the DC/DC converter 15A lowers the output voltage Vo_dcdc as the output voltage Vo_rect of the rectifier circuit 12A becomes lower.
  • the output current of the DC/DC converter 15A decreases, and the output currents of the DC/DC converters 15B, 15C, and 15D increase to compensate for the decrease.
  • the output current of the DC/DC converter 15A decreases in this way, the input current of the DC/DC converter 15A decreases, and the output current Io_rect of the rectifier circuit 12A decreases.
  • the output current Io_rect of the rectifier circuit 12A can be suppressed low, and the diode of the rectifier circuit 12A can be protected.
  • the four DC/DC converters 15A to 15D can cooperatively supply DC power to the load device 9.
  • the DC/DC converter 15A increases the output voltage Vo_dcdc as the output voltage Vo_rect of the rectifier circuit 12A increases.
  • the output current of the DC/DC converter 15A increases, and the output currents of the DC/DC converters 15B, 15C, and 15D decrease by the increased amount.
  • the four DC/DC converters 15A to 15D can cooperate to supply DC power to the load device 9.
  • FIG. 10 shows a correction operation for the output voltage Vo_dcdc of the DC/DC converter 15A based on the output current Io_rect of the rectifier circuit 12A.
  • the correction command value generation circuit 27 uses equation EQ2 to generate a correction command value ⁇ Vb based on the output current Io_rect of the rectifier circuit 12A.
  • the addition circuit 39 generates the voltage command value Vref1 of the target voltage using equation EQ4.
  • the output voltage Vo_dcdc of the DC/DC converter 15A increases as the output current Io_rect of the rectifier circuit 12A increases.
  • the DC/DC converter 15A sets the output voltage Vo_dcdc of the DC/DC converter 15A to the voltage Vo3, and the output current Io_rect of the rectifier circuit 12A becomes the current I1.
  • the output voltage Vo_dcdc of the DC/DC converter 15A is set to a voltage Vo4 lower than the voltage Vo3.
  • the rectenna device 1 can cooperatively supply DC power to the load device 9 while protecting the diode of the rectifier circuit 12A, as described below.
  • the DC/DC converter 15A lowers the output voltage Vo_dcdc as the output current Io_rect of the rectifier circuit 12A increases.
  • the output voltage Vo_dcdc of the DC/DC converter 15A decreases, the output current of the DC/DC converter 15A decreases, and the output currents of the DC/DC converters 15B, 15C, and 15D increase to compensate for the decrease.
  • the output current of the DC/DC converter 15A decreases in this way, the input current of the DC/DC converter 15A decreases, and the output current Io_rect of the rectifier circuit 12A decreases. In this way, in the rectenna device 1, the output current Io_rect of the rectifier circuit 12A can be suppressed low, and the diode of the rectifier circuit 12A can be protected. In the rectenna device 1, the four DC/DC converters 15A to 15D can cooperatively supply DC power to the load device 9.
  • the DC/DC converter 15A increases the output voltage Vo_dcdc as the output current Io_rect of the rectifier circuit 12A decreases.
  • the output voltage Vo_dcdc of the DC/DC converter 15A increases, the output current of the DC/DC converter 15A increases, and the output currents of the DC/DC converters 15B, 15C, and 15D decrease by the increased amount.
  • the four DC/DC converters 15A to 15D can cooperate to supply DC power to the load device 9.
  • FIG. 11 shows a correction operation of the output voltage Vo_dcdc of the DC/DC converter 15A based on the circuit temperature T_rect of the rectifier circuit 12A.
  • the correction command value generation circuit 28 uses equation EQ3 to generate a correction command value ⁇ Vc based on the circuit temperature T_rect of the rectifier circuit 12A.
  • the addition circuit 39 generates the voltage command value Vref1 of the target voltage using equation EQ4.
  • the output voltage Vo_dcdc of the DC/DC converter 15A becomes lower as the circuit temperature T_rect of the rectifier circuit 12A becomes higher.
  • the DC/DC converter 15A sets the output voltage Vo_dcdc of the DC/DC converter 15A to the voltage Vo5
  • the circuit temperature To_rect of the rectifier circuit 12A is the temperature T1.
  • the output voltage Vo_dcdc of the DC/DC converter 15A is set to a voltage Vo6 lower than the voltage Vo5.
  • the rectenna device 1 can cooperatively supply DC power to the load device 9 while protecting the diode of the rectifier circuit 12A, as described below.
  • FIG. 12 shows characteristics showing the relationship between the output current Io_rect of the rectifier circuit 12A and the circuit temperature T_rect. For example, the greater the output current Io_rect of the rectifier circuit 12A, the greater the energy loss in the diode and the higher the circuit temperature T_rect. In particular, in this example, in a region where the output current Io_rect is large, the circuit temperature T_rect increases rapidly as the output current Io_rect increases.
  • the output current Io_rect of the rectifier circuit 12A is large.
  • the diodes of the rectifier circuit 12A have little margin in terms of current capacity. For example, if the output current Io_rect is excessive, the characteristics of the diode in the rectifier circuit 12A may deteriorate or the diode may fail. Therefore, the DC/DC converter 15A lowers the output voltage Vo_dcdc as the circuit temperature T_rect of the rectifier circuit 12A increases.
  • the output current of the DC/DC converter 15A decreases, and the output currents of the DC/DC converters 15B, 15C, and 15D increase to compensate for the decrease.
  • the output current of the DC/DC converter 15A decreases in this way, the input current of the DC/DC converter 15A decreases, and the output current Io_rect of the rectifier circuit 12A decreases.
  • the output current Io_rect of the rectifier circuit 12A can be suppressed low, and the diode of the rectifier circuit 12A can be protected.
  • the four DC/DC converters 15A to 15D can cooperatively supply DC power to the load device 9.
  • the DC/DC converter 15A increases the output voltage Vo_dcdc as the output current Io_rect of the rectifier circuit 12A decreases.
  • the output voltage Vo_dcdc of the DC/DC converter 15A increases, the output current of the DC/DC converter 15A increases, and the output currents of the DC/DC converters 15B, 15C, and 15D decrease by the increased amount.
  • the four DC/DC converters 15A to 15D can cooperate to supply DC power to the load device 9.
  • the rectifier circuit 12A, the sensor circuit 13A, the correction control circuit 14A, and the DC/DC converter 15A have been explained above as examples, the rectifier circuit 12B, the sensor circuit 13B, the correction control circuit 14B, and the DC/DC converter The same applies to converter 15B, the same applies to rectifier circuit 12C, sensor circuit 13C, correction control circuit 14C, and DC/DC converter 15C, and the same applies to rectifier circuit 12D, sensor circuit 13D, correction control circuit 14D, and DC/DC converter 15C. The same applies to converter 15D.
  • the rectenna device 1 includes the antenna section 10 capable of receiving microwaves, the four rectifier circuits 12 each connected to the antenna section 10 and capable of rectifying the power signal supplied from the antenna section 10, Four DC/DC converters 15 are provided corresponding to the four rectifier circuits 12, and each of the four DC/DC converters 15 is capable of generating DC power based on the output power of the corresponding rectifier circuit 12.
  • the power output terminal T connected to the output terminal is provided corresponding to each of the four rectifier circuits 12, and is provided corresponding to each of the four DC/DC converters 15.
  • four correction control circuits 14 capable of correcting the output voltage of the corresponding DC/DC converter 15 based on one or more of output voltage, output current, and circuit temperature.
  • each of the four correction control circuits 14 outputs the output of the corresponding DC/DC converter 15 when the output voltage Vo_rect of the corresponding rectifier circuit 12 is the first voltage (for example, voltage V1).
  • the voltage Vo_dcdc is set to the first output voltage (for example, voltage Vo1) and the output voltage Vo_rect of the corresponding rectifier circuit 12 is a second voltage (for example, voltage V2) higher than the first voltage
  • the output voltage Vo_dcdc of the corresponding DC/DC converter 15 can be corrected so that the output voltage Vo_dcdc of the DC converter 15 becomes a second output voltage (for example, voltage Vo2) higher than the first output voltage.
  • the output current Io_rect of the rectifier circuit 12 can be suppressed low, so that the diode of the rectifier circuit 12 can be protected. can.
  • each of the four correction control circuits 14 outputs the output of the corresponding DC/DC converter 15 when the output current Io_rect of the corresponding rectifier circuit 12 is the first current (for example, current I1).
  • the voltage Vo_dcdc is set to the third output voltage (for example, the voltage Vo3) and the output current Io_rect of the corresponding rectifier circuit 12 is a second current (for example, the current I2) that is larger than the first current
  • the output voltage Vo_dcdc of the corresponding DC/DC converter 15 can be corrected so that the output voltage Vo_dcdc of the DC converter 15 becomes the fourth output voltage (voltage Vo4) lower than the third output voltage.
  • the output current Io_rect of the corresponding rectifier circuit 12 when the output current Io_rect of the corresponding rectifier circuit 12 is large, the output current Io_rect of the corresponding rectifier circuit 12 can be suppressed to a low level, so that the diode of the rectifier circuit 12 can be protected. can.
  • each of the four correction control circuits 14 outputs the output of the corresponding DC/DC converter 15 when the circuit temperature T_rect of the corresponding rectifier circuit 12 is the first temperature (for example, temperature T1).
  • the voltage Vo_dcdc is set to the fifth output voltage (for example, voltage Vo5) and the circuit temperature T_rect of the corresponding rectifier circuit 12 is a second temperature (for example, temperature T2) higher than the first temperature
  • the output voltage Vo_dcdc of the corresponding DC/DC converter 15 can be corrected so that the output voltage Vo_dcdc of the DC converter 15 becomes a sixth output voltage (for example, voltage Vo6) lower than the fifth output voltage. .
  • the rectenna device 1 for example, when the circuit temperature T_rect of the corresponding rectifier circuit 12 is high, the output current Io_rect of the rectifier circuit 12 can be suppressed to a low level, so that the diode of the rectifier circuit 12 can be protected. can.
  • this embodiment includes an antenna unit capable of receiving microwaves, four rectifier circuits each connected to the antenna unit and capable of rectifying the power signal supplied from the antenna unit, and four rectifier circuits each connected to the antenna unit and capable of rectifying the power signal supplied from the antenna unit.
  • Four DC/DC converters each of which is provided corresponding to the circuit, and each capable of generating DC power based on the output power of the corresponding rectifier circuit, and power connected to the output terminals of the four DC/DC converters.
  • the output terminal is provided corresponding to each of the four rectifier circuits, and is provided corresponding to each of the four DC/DC converters. Since four correction control circuits capable of correcting the output voltage of the corresponding DC/DC converter based on one or more of them are provided, the diodes of the rectifier circuit can be protected.
  • each of the four correction control circuits sets the output voltage of the corresponding DC/DC converter to the first output voltage when the output voltage of the corresponding rectifier circuit is the first voltage.
  • the output voltage of the rectifier circuit is a second voltage higher than the first voltage
  • the output voltage of the corresponding DC/DC converter is set to a second output voltage higher than the first output voltage, Since the output voltage of the corresponding DC/DC converter can be corrected, the diode of the rectifier circuit can be protected.
  • each of the four correction control circuits sets the output voltage of the corresponding DC/DC converter to the third output voltage when the output current of the corresponding rectifier circuit is the first current, and When the output current of the rectifier circuit is a second current larger than the first current, the output voltage of the corresponding DC/DC converter is set to a fourth output voltage lower than the third output voltage, Since the output voltage of the corresponding DC/DC converter can be corrected, the diode of the rectifier circuit can be protected.
  • each of the four correction control circuits sets the output voltage of the corresponding DC/DC converter to the fifth output voltage when the circuit temperature of the corresponding rectifier circuit is the first temperature.
  • the output voltage of the corresponding DC/DC converter is set to a sixth output voltage lower than the fifth output voltage, Since the output voltage of the corresponding DC/DC converter can be corrected, the diode of the rectifier circuit can be protected.
  • antennas 11A to 11D are provided as shown in FIG.
  • five or more antennas 11 may be provided.
  • one antenna 11 may be provided like a rectenna device 1A shown in FIG. 13. In this case, the power output from antenna 11 is distributed to four rectifier circuits 12A to 12D.
  • the output terminal of the antenna 11A is connected to the input terminal of the rectifier circuit 12A
  • the output terminal of the antenna 11B is connected to the input terminal of the rectifier circuit 12B
  • the output terminal of the antenna 11C is connected to the input terminal of the rectifier circuit 12C.
  • the output terminal of the antenna 11D is connected to the input terminal of the rectifier circuit 12D.
  • 15 and 16 represent implementation examples of four antennas 11, four rectifier circuits 12, four sensor circuits 13, four correction control circuits 14, and four DC/DC converters 15 in the rectenna device 1B.
  • Four antennas 11, four rectifier circuits 12, four sensor circuits 13, four correction control circuits 14, and four DC/DC converters 15 are mounted on a substrate 110, which is a printed circuit board in this example.
  • 10 shows a substrate side 110A of the substrate 110
  • FIG. 11 shows a substrate side 110B of the substrate 110 opposite the substrate side 110A.
  • four antennas 11 are mounted on the substrate surface 110A
  • four rectifier circuits 12, four sensor circuits 13, four correction control circuits 14, and four DC/DC converters 15 are mounted on the substrate surface 110B.
  • the four antennas 11 are arranged in two rows and two columns in this example.
  • the four antennas 11 are guided to four feeding points 111, respectively.
  • circuit groups including the rectifier circuit 12, the sensor circuit 13, the correction control circuit 14, and the DC/DC converter 15 are arranged in two rows and two columns in this example. Ru.
  • the four rectifier circuits 12 are respectively guided to four feed points 111.
  • a large amount of current may flow through any one of the four rectifier circuits 12A to 12D due to variations in the characteristics of the four rectifier circuits 12A to 12D.
  • the characteristics of the diode in the rectifier circuit 12 may deteriorate or the diode may fail.
  • the correction control circuit 14A detects the output voltage Vo_rect and output current Io_rect of the rectifier circuit 12A supplied from the sensor circuit 13A, and the detection results from the rectifier circuit 12A. Based on the detection result of the supplied circuit temperature T_rect, a correction command value indicating the amount of correction of the output voltage Vo_dcdc of the DC/DC converter 15A is generated.
  • the DC/DC converter 15A corrects the output voltage based on the correction command value supplied from the correction control circuit 14A. This prevents excessive current from flowing through the diodes of the rectifier circuit 12A, thereby reducing the possibility that the characteristics of the diodes will deteriorate or that the diodes will fail.
  • the four DC/DC converters 15A to 15D can cooperatively supply DC power to the load device 9.
  • the output voltage Vo_dcdc of the DC/DC converter 15 is changed linearly according to the change in the output voltage Vo_rect of the rectifier circuit 12, but the present invention is not limited to this. Instead of this, for example, the output voltage Vo_dcdc may change nonlinearly in response to changes in the output voltage Vo_rect.
  • the output voltage Vo_dcdc of the DC/DC converter 15 is changed linearly according to the change in the output current Io_rect of the rectifier circuit 12.
  • the output voltage Vo_dcdc is not limited to this, and instead, for example, the output voltage Vo_dcdc may change nonlinearly in accordance with the change in the output current Io_rect.
  • the output voltage Vo_dcdc of the DC/DC converter 15 is changed linearly according to the change in the circuit temperature T_rect of the rectifier circuit 12.
  • the output voltage Vo_dcdc is not limited to this, and instead, for example, the output voltage Vo_dcdc may change nonlinearly in accordance with a change in the circuit temperature T_rect.
  • circuit groups each including the rectifier circuit 12, the sensor circuit 13, the correction control circuit 14, and the DC/DC converter 15 are provided, but the present invention is not limited to this. Instead, three or less circuit groups may be provided, or five or more circuit groups may be provided.

Abstract

This rectenna device according to one embodiment of the present invention comprises: an antenna unit that is able to receive microwaves; a plurality of rectifying circuits that are each connected to the antenna unit and capable of rectifying power signals supplied from the antenna unit; a plurality of power conversion circuits that are respectively provided in correspondence to the plurality of rectifying circuits and are capable of generating direct current power on the basis of the output power of the corresponding rectifying circuit; a power output terminal that is connected to output terminals of the plurality of power conversion circuits; and a plurality of correction control circuits that are respectively provided in correspondence to the plurality of rectifying circuits and respectively provided in correspondence to the plurality of power conversion circuits, and that are each capable of correcting the output voltage of the corresponding power conversion circuit on the basis of one or more of the output voltage, the output current, and the circuit temperature of the corresponding rectifying circuit.

Description

レクテナ装置rectenna device
　本発明は、マイクロ波によるワイヤレス電力伝送に用いられるレクテナ装置に関する。 The present invention relates to a rectenna device used for wireless power transmission using microwaves.
　ワイヤレス電力伝送には、マイクロ波を用いたものがある。ワイヤレス電力伝送では、伝送可能な電力を大きくすることが望まれている。例えば、特許文献１には、マイクロ波を受信するレクテナ装置において、アンテナが受電した電力を、伝送線路を介して複数の整流回路に分配する技術が開示されている。 Some wireless power transmission uses microwaves. In wireless power transmission, it is desired to increase the amount of power that can be transmitted. For example, Patent Document 1 discloses a technique in which power received by an antenna is distributed to a plurality of rectifier circuits via a transmission line in a rectenna device that receives microwaves.
特開２００２－８４８６５号公報Japanese Patent Application Publication No. 2002-84865
　アンテナと複数の整流回路とを結ぶ伝送線路の特性や、複数の整流回路の特性にばらつきがある場合には、例えば複数の整流回路のうちの一部に多くの電力が供給される可能性がある。この場合には、例えば、多くの電力が供給された整流回路の回路部品の特性が劣化し、あるいは回路部品が故障する可能性がある。よって、回路部品を保護することができることが望まれている。 If there are variations in the characteristics of the transmission line connecting the antenna and multiple rectifier circuits or the characteristics of multiple rectifier circuits, for example, there is a possibility that a large amount of power is supplied to some of the multiple rectifier circuits. be. In this case, for example, the characteristics of the circuit components of the rectifier circuit to which a large amount of power is supplied may deteriorate, or the circuit components may break down. Therefore, it is desired to be able to protect circuit components.
　回路部品を保護することができるレクテナ装置を提供することが望ましい。 It is desirable to provide a rectenna device that can protect circuit components.
　本発明の一実施の形態に係るレクテナ装置は、アンテナ部と、複数の整流回路と、複数の電力変換回路と、電力出力端子と、複数の補正制御回路とを備えている。アンテナ部は、マイクロ波を受信することができるように構成される。複数の整流回路のそれぞれは、アンテナ部に接続され、アンテナ部から供給された電力信号を整流することができるように構成される。複数の電力変換回路は、複数の整流回路にそれぞれ対応して設けられ、それぞれが、対応する整流回路の出力電力に基づいて直流電力を生成することができるように構成される。電力出力端子は、複数の電力変換回路の出力端子に接続される。複数の補正制御回路は、複数の整流回路にそれぞれ対応して設けられるとともに、複数の電力変換回路にそれぞれ対応して設けられ、それぞれが、対応する整流回路の、出力電圧、出力電流、および回路温度のうちの１以上に基づいて、対応する電力変換回路の出力電圧を補正することができるように構成される。 A rectenna device according to an embodiment of the present invention includes an antenna section, a plurality of rectifier circuits, a plurality of power conversion circuits, a power output terminal, and a plurality of correction control circuits. The antenna section is configured to be able to receive microwaves. Each of the plurality of rectifier circuits is connected to the antenna section and configured to be able to rectify the power signal supplied from the antenna section. The plurality of power conversion circuits are provided corresponding to the plurality of rectifier circuits, respectively, and each is configured to be able to generate DC power based on the output power of the corresponding rectifier circuit. The power output terminal is connected to output terminals of the plurality of power conversion circuits. The plurality of correction control circuits are provided corresponding to the plurality of rectifier circuits, respectively, and are provided corresponding to the plurality of power conversion circuits, and each corrects the output voltage, output current, and circuit of the corresponding rectifier circuit. The output voltage of the corresponding power conversion circuit can be corrected based on one or more of the temperatures.
　本発明の一実施の形態に係るレクテナ装置によれば、回路部品を保護することができる。 According to the rectenna device according to an embodiment of the present invention, circuit components can be protected.
本発明の一実施の形態に係るレクテナ装置の一構成例を表すブロック図である。FIG. 1 is a block diagram illustrating a configuration example of a rectenna device according to an embodiment of the present invention. 図１に示した整流回路の一構成例を表す回路図である。FIG. 2 is a circuit diagram showing a configuration example of the rectifier circuit shown in FIG. 1. FIG. 図１に示した整流回路の他の一構成例を表す回路図である。FIG. 2 is a circuit diagram showing another configuration example of the rectifier circuit shown in FIG. 1. FIG. 図１に示した整流回路の他の一構成例を表す回路図である。FIG. 2 is a circuit diagram showing another configuration example of the rectifier circuit shown in FIG. 1. FIG. 図１に示した整流回路、センサ回路、補正制御回路、およびＤＣ／ＤＣコンバータの一構成例を表す回路図である。FIG. 2 is a circuit diagram illustrating a configuration example of a rectifier circuit, a sensor circuit, a correction control circuit, and a DC/DC converter illustrated in FIG. 1. FIG. 図１に示したレクテナ装置の一実装例を表す説明図である。FIG. 2 is an explanatory diagram showing an example of mounting the rectenna device shown in FIG. 1; 図１に示したレクテナ装置の一実装例を表す他の説明図である。FIG. 2 is another explanatory diagram showing an example of mounting the rectenna device shown in FIG. 1; 図１に示したレクテナ装置の一動作例を表す特性図である。2 is a characteristic diagram showing an example of the operation of the rectenna device shown in FIG. 1. FIG. 図１に示した整流回路の一特性例を表す特性図である。2 is a characteristic diagram showing an example of the characteristics of the rectifier circuit shown in FIG. 1. FIG. 図１に示したレクテナ装置の他の一動作例を表す特性図である。2 is a characteristic diagram showing another example of the operation of the rectenna device shown in FIG. 1. FIG. 図１に示したレクテナ装置の他の一動作例を表す特性図である。2 is a characteristic diagram showing another example of the operation of the rectenna device shown in FIG. 1. FIG. 図１に示した整流回路の他の一特性例を表す特性図である。FIG. 2 is a characteristic diagram showing another example of the characteristics of the rectifier circuit shown in FIG. 1; 変形例に係るレクテナ装置の一構成例を表すブロック図である。It is a block diagram showing one example of composition of a rectenna device concerning a modification. 他の変形例に係るレクテナ装置の一構成例を表すブロック図である。It is a block diagram showing one example of composition of a rectenna device concerning another modification. 図１４に示したレクテナ装置の一実装例を表す説明図である。15 is an explanatory diagram showing an example of mounting the rectenna device shown in FIG. 14. FIG. 図１４に示したレクテナ装置の一実装例を表す他の説明図である。15 is another explanatory diagram showing an example of mounting the rectenna device shown in FIG. 14. FIG.
　以下、本発明の実施の形態について、図面を参照して詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
＜実施の形態＞
［構成例］
　図１は、本発明の第１の実施の形態に係るレクテナ装置（レクテナ装置１）の一構成例を表すものである。レクテナ装置１は、マイクロ波により電力伝送を行うワイヤレス電力伝送システムおいて用いられる受電装置である。レクテナ装置１は、マイクロ波により伝送された電力に基づいて直流電力を生成し、生成した直流電力を負荷装置９に供給するように構成される。レクテナ装置１は、アンテナ部１０と、複数の整流回路１２（この例では４つの整流回路１２Ａ～１２Ｄ）と、複数のセンサ回路１３（この例では４つのセンサ回路１３Ａ～１３Ｄ）と、複数の補正制御回路１４（この例では４つの補正制御回路１４Ａ～１４Ｄ）と、複数のＤＣ／ＤＣコンバータ１５（この例では４つのＤＣ／ＤＣコンバータ１５Ａ～１５Ｄ）と、コンバータ制御回路１６と、電力出力端子Ｔとを備えている。 <Embodiment>
[Configuration example]
FIG. 1 shows an example of the configuration of a rectenna device (rectenna device 1) according to a first embodiment of the present invention. The rectenna device 1 is a power receiving device used in a wireless power transmission system that transmits power using microwaves. The rectenna device 1 is configured to generate DC power based on the power transmitted by microwaves, and to supply the generated DC power to the load device 9. The rectenna device 1 includes an antenna unit 10, a plurality of rectifier circuits 12 (four rectifier circuits 12A to 12D in this example), a plurality of sensor circuits 13 (four sensor circuits 13A to 13D in this example), and a plurality of rectifier circuits 12 (four rectifier circuits 12A to 12D in this example). A correction control circuit 14 (four correction control circuits 14A to 14D in this example), a plurality of DC/DC converters 15 (four DC/DC converters 15A to 15D in this example), a converter control circuit 16, and a power output It is equipped with a terminal T.
　アンテナ部１０は、マイクロ波を受信するように構成される。アンテナ部１０は、複数のアンテナ１１（この例では４つのアンテナ１１Ａ～１１Ｄ）を有する。アンテナ１１Ａ～１１Ｄのそれぞれは、例えばパッチアンテナを用いて構成することができる。アンテナ１１Ａ～１１Ｄの出力端子は、互いに接続されるとともに、整流回路１２Ａ～１２Ｄの入力端子に接続される。 The antenna section 10 is configured to receive microwaves. The antenna section 10 has a plurality of antennas 11 (four antennas 11A to 11D in this example). Each of the antennas 11A to 11D can be configured using, for example, a patch antenna. Output terminals of antennas 11A to 11D are connected to each other and to input terminals of rectifier circuits 12A to 12D.
　整流回路１２Ａは、アンテナ部１０に接続され、アンテナ部１０から供給された電力信号を整流するように構成される。同様に、整流回路１２Ｂは、アンテナ部１０に接続され、アンテナ部１０から供給された電力信号を整流するように構成される。整流回路１２Ｃは、アンテナ部１０に接続され、アンテナ部１０から供給された電力信号を整流するように構成される。整流回路１２Ｄは、アンテナ部１０に接続され、アンテナ部１０から供給された電力信号を整流するように構成される。整流回路１２Ａ～１２Ｄの入力端子は、互いに接続されるとともに、アンテナ部１０のアンテナ１１Ａ～１１Ｄの出力端子に接続される。 The rectifier circuit 12A is connected to the antenna section 10 and is configured to rectify the power signal supplied from the antenna section 10. Similarly, the rectifier circuit 12B is connected to the antenna section 10 and configured to rectify the power signal supplied from the antenna section 10. The rectifier circuit 12C is connected to the antenna section 10 and is configured to rectify the power signal supplied from the antenna section 10. The rectifier circuit 12D is connected to the antenna section 10 and is configured to rectify the power signal supplied from the antenna section 10. The input terminals of the rectifier circuits 12A to 12D are connected to each other and to the output terminals of the antennas 11A to 11D of the antenna section 10.
　図２は、整流回路１２の一構成例を表すものである。この図２において、整流回路１２の左に、前段のアンテナ部１０が接続され、整流回路１２の右に、後段のセンサ回路１３が接続される。この整流回路１２は、いわゆるシングルシャント型の整流回路であり、ダイオードＤ１と、伝送線路ＴＬと、キャパシタＣ１とを有する。電圧線Ｌ１および基準電圧線Ｌ２は、前段のアンテナ１１に導かれるとともに、後段のセンサ回路１３に導かれる。ダイオードＤ１のアノードは基準電圧線Ｌ２に接続され、カソードは電圧線Ｌ１において伝送線路ＴＬの一端に接続される。伝送線路ＴＬは、線路長がλ／４である伝送線路であり、電圧線Ｌ１に設けられ、一端はダイオードＤ１のカソードに接続され、他端はキャパシタＣ１の一端に接続される。キャパシタＣ１の一端は電圧線Ｌ１において伝送線路ＴＬの他端に接続され、他端は基準電圧線Ｌ２に接続される。 FIG. 2 shows an example of the configuration of the rectifier circuit 12. In FIG. 2, the antenna section 10 at the front stage is connected to the left of the rectifier circuit 12, and the sensor circuit 13 at the rear stage is connected to the right of the rectifier circuit 12. This rectifier circuit 12 is a so-called single shunt type rectifier circuit, and includes a diode D1, a transmission line TL, and a capacitor C1. The voltage line L1 and the reference voltage line L2 are guided to the antenna 11 at the front stage and to the sensor circuit 13 at the rear stage. The anode of the diode D1 is connected to the reference voltage line L2, and the cathode is connected to one end of the transmission line TL in the voltage line L1. The transmission line TL is a transmission line with a line length of λ/4, is provided on the voltage line L1, has one end connected to the cathode of the diode D1, and has the other end connected to one end of the capacitor C1. One end of the capacitor C1 is connected to the other end of the transmission line TL on the voltage line L1, and the other end is connected to the reference voltage line L2.
　図３は、他の整流回路１２の一構成例を表すものである。この整流回路１２は、いわゆる半波倍電圧型の整流回路であり、キャパシタＣ２と、ダイオードＤ１と、ダイオードＤ２と、キャパシタＣ１とを有する。キャパシタＣ２は電圧線Ｌ１に設けられ、一端は前段のアンテナ部１０に接続され、他端はダイオードＤ１のカソードおよびダイオードＤ２のアノードに接続される。ダイオードＤ１のアノードは基準電圧線Ｌ２に接続され、カソードは電圧線Ｌ１においてキャパシタＣ２の他端およびダイオードＤ２のアノードに接続される。ダイオードＤ２は電圧線Ｌ１に設けられ、アノードはキャパシタＣ２の他端およびダイオードＤ１のカソードに接続され、カソードはキャパシタＣ１の一端に接続される。キャパシタＣ１の一端は電圧線Ｌ１においてダイオードＤ２のカソードに接続され、他端は基準電圧線Ｌ２に接続される。 FIG. 3 shows a configuration example of another rectifier circuit 12. The rectifier circuit 12 is a so-called half-wave voltage doubler type rectifier circuit, and includes a capacitor C2, a diode D1, a diode D2, and a capacitor C1. Capacitor C2 is provided on voltage line L1, one end is connected to the preceding antenna section 10, and the other end is connected to the cathode of diode D1 and the anode of diode D2. The anode of diode D1 is connected to reference voltage line L2, and the cathode is connected to the other end of capacitor C2 and the anode of diode D2 on voltage line L1. Diode D2 is provided on voltage line L1, its anode is connected to the other end of capacitor C2 and the cathode of diode D1, and its cathode is connected to one end of capacitor C1. One end of the capacitor C1 is connected to the cathode of the diode D2 on the voltage line L1, and the other end is connected to the reference voltage line L2.
　図４は、他の整流回路１２の一構成例を表すものである。この整流回路１２は、いわゆる全波整流型の整流回路であり、ダイオードＤ３～Ｄ６と、キャパシタＣ１とを有する。電圧線Ｌ１および基準電圧線Ｌ３は、前段のアンテナ部１０に導かれ、電圧線Ｌ１および基準電圧線Ｌ２は、後段のセンサ回路１３に導かれる。ダイオードＤ３のアノードは基準電圧線Ｌ２に接続され、カソードは電圧線Ｌ１においてダイオードＤ４のアノードに接続される。ダイオードＤ４は電圧線Ｌ１に設けられ、アノードはダイオードＤ３のカソードに接続され、カソードはダイオードＤ６のカソードおよびキャパシタＣ１の一端に接続される。ダイオードＤ５のアノードは基準電圧線Ｌ２に接続され、カソードは基準電圧線Ｌ３に接続される。ダイオードＤ６のアノードは基準電圧線Ｌ３に接続され、カソードは電圧線Ｌ１おいてダイオードＤ４のカソードおよびキャパシタＣ１の一端に接続される。キャパシタＣ１の一端は電圧線Ｌ１においてダイオードＤ４，Ｄ６のカソードに接続され、他端は基準電圧線Ｌ２に接続される。 FIG. 4 shows a configuration example of another rectifier circuit 12. This rectifier circuit 12 is a so-called full-wave rectifier type rectifier circuit, and includes diodes D3 to D6 and a capacitor C1. The voltage line L1 and the reference voltage line L3 are led to the antenna section 10 at the front stage, and the voltage line L1 and the reference voltage line L2 are led to the sensor circuit 13 at the rear stage. The anode of diode D3 is connected to reference voltage line L2, and the cathode is connected to the anode of diode D4 on voltage line L1. Diode D4 is provided on voltage line L1, has an anode connected to the cathode of diode D3, and a cathode connected to the cathode of diode D6 and one end of capacitor C1. The anode of the diode D5 is connected to the reference voltage line L2, and the cathode is connected to the reference voltage line L3. The anode of diode D6 is connected to reference voltage line L3, and the cathode is connected to voltage line L1 to the cathode of diode D4 and one end of capacitor C1. One end of the capacitor C1 is connected to the cathodes of diodes D4 and D6 on the voltage line L1, and the other end is connected to the reference voltage line L2.
　整流回路１２は、例えば、図２～４に示した回路を用いることができる。なお、これらに限定されるものではなく、他の回路を用いてもよい。 As the rectifier circuit 12, for example, the circuits shown in FIGS. 2 to 4 can be used. Note that the circuit is not limited to these, and other circuits may be used.
　整流回路１２は、後述するように、整流回路１２の回路温度を検出する温度センサを有している。整流回路１２Ａ～１２Ｄは、温度センサの検出結果を、補正制御回路１４Ａ～１４Ｄにそれぞれに供給するようになっている。 The rectifier circuit 12 has a temperature sensor that detects the circuit temperature of the rectifier circuit 12, as described later. The rectifier circuits 12A to 12D are configured to supply the detection results of the temperature sensors to the correction control circuits 14A to 14D, respectively.
　４つのセンサ回路１３Ａ～１３Ｄ（図１）は、４つの整流回路１２Ａ～１２Ｄにそれぞれ対応して設けられる。センサ回路１３Ａは、整流回路１２Ａの出力電圧（後述する出力電圧Ｖo_rect）および整流回路１２Ａの出力電流（後述する出力電流Ｉo_rect）を検出し、その検出結果を補正制御回路１４Ａに供給するように構成される。同様に、センサ回路１３Ｂは、整流回路１２Ｂの出力電圧および出力電流を検出し、その検出結果を補正制御回路１４Ｂに供給するように構成される。センサ回路１３Ｃは、整流回路１２Ｃの出力電圧および出力電流を検出し、その検出結果を補正制御回路１４Ｃに供給するように構成される。センサ回路１３Ｄは、整流回路１２Ｄの出力電圧および出力電流を検出し、その検出結果を補正制御回路１４Ｄに供給するように構成される。 The four sensor circuits 13A to 13D (FIG. 1) are provided corresponding to the four rectifier circuits 12A to 12D, respectively. The sensor circuit 13A is configured to detect the output voltage of the rectifier circuit 12A (output voltage Vo_rect described later) and the output current of the rectifier circuit 12A (output current Io_rect described later), and supply the detection results to the correction control circuit 14A. be done. Similarly, the sensor circuit 13B is configured to detect the output voltage and output current of the rectifier circuit 12B, and supply the detection results to the correction control circuit 14B. The sensor circuit 13C is configured to detect the output voltage and output current of the rectifier circuit 12C, and supply the detection results to the correction control circuit 14C. The sensor circuit 13D is configured to detect the output voltage and output current of the rectifier circuit 12D, and supply the detection results to the correction control circuit 14D.
　補正制御回路１４Ａは、センサ回路１３Ａから供給された整流回路１２Ａの出力電圧および出力電流の検出結果、および整流回路１２Ａから供給された回路温度の検出結果に基づいて、ＤＣ／ＤＣコンバータ１５Ａの出力電圧（後述する出力電圧Ｖo_dcdc）の補正量を示す補正指令値を生成するように構成される。補正制御回路１４Ｂは、センサ回路１３Ｂから供給された出力電圧および出力電流の検出結果、および整流回路１２Ｂから供給された回路温度の検出結果に基づいて、ＤＣ／ＤＣコンバータ１５Ｂの出力電圧の補正量を示す補正指令値を生成するように構成される。補正制御回路１４Ｃは、センサ回路１３Ｃから供給された整流回路１２Ｃの出力電圧および出力電流、および整流回路１２Ｃから供給された回路温度の検出結果の検出結果に基づいて、ＤＣ／ＤＣコンバータ１５Ｃの出力電圧の補正量を示す補正指令値を生成するように構成される。補正制御回路１４Ｄは、センサ回路１３Ｄから供給された整流回路１２Ｄの出力電圧および出力電流の検出結果、および整流回路１２Ｄから供給された回路温度の検出結果に基づいて、ＤＣ／ＤＣコンバータ１５Ｄの出力電圧の補正量を示す補正指令値を生成するように構成される。 The correction control circuit 14A adjusts the output of the DC/DC converter 15A based on the detection results of the output voltage and output current of the rectifier circuit 12A supplied from the sensor circuit 13A and the detection result of the circuit temperature supplied from the rectifier circuit 12A. It is configured to generate a correction command value indicating the amount of correction of the voltage (output voltage Vo_dcdc described later). The correction control circuit 14B adjusts the amount of correction for the output voltage of the DC/DC converter 15B based on the detection results of the output voltage and output current supplied from the sensor circuit 13B and the detection result of the circuit temperature supplied from the rectifier circuit 12B. The correction command value is configured to generate a correction command value indicating. The correction control circuit 14C adjusts the output of the DC/DC converter 15C based on the output voltage and output current of the rectifier circuit 12C supplied from the sensor circuit 13C and the detection result of the circuit temperature supplied from the rectifier circuit 12C. It is configured to generate a correction command value indicating a voltage correction amount. The correction control circuit 14D adjusts the output of the DC/DC converter 15D based on the detection results of the output voltage and output current of the rectifier circuit 12D supplied from the sensor circuit 13D and the detection result of the circuit temperature supplied from the rectifier circuit 12D. It is configured to generate a correction command value indicating a voltage correction amount.
　４つのＤＣ／ＤＣコンバータ１５Ａ～１５Ｄは、４つの整流回路１２Ａ～１２Ｄ、４つのセンサ回路１３Ａ～１３Ｄ、および４つの補正制御回路１４Ａ～１４Ｄにそれぞれ対応して設けられる。ＤＣ／ＤＣコンバータ１５Ａは、整流回路１２Ａの出力電力に基づいて直流電力を生成するとともに、補正制御回路１４Ａから供給された補正指令値に基づいて出力電圧を補正するように構成される。同様に、ＤＣ／ＤＣコンバータ１５Ｂは、整流回路１２Ｂの出力電力に基づいて直流電力を生成するとともに、補正制御回路１４Ｂから供給された補正指令値に基づいて出力電圧を補正するように構成される。ＤＣ／ＤＣコンバータ１５Ｃは、整流回路１２Ｃの出力電力に基づいて直流電力を生成するとともに、補正制御回路１４Ｃから供給された補正指令値に基づいて出力電圧を補正するように構成される。ＤＣ／ＤＣコンバータ１５Ｄは、整流回路１２Ｄの出力電力に基づいて直流電力を生成するとともに、補正制御回路１４Ｄから供給された補正指令値に基づいて出力電圧を補正するように構成される。４つのＤＣ／ＤＣコンバータ１５Ａ～１５Ｄの出力端子は、互いに接続されるとともに、電力出力端子Ｔに接続される。 The four DC/DC converters 15A to 15D are provided corresponding to the four rectifier circuits 12A to 12D, the four sensor circuits 13A to 13D, and the four correction control circuits 14A to 14D, respectively. The DC/DC converter 15A is configured to generate DC power based on the output power of the rectifier circuit 12A, and to correct the output voltage based on the correction command value supplied from the correction control circuit 14A. Similarly, the DC/DC converter 15B is configured to generate DC power based on the output power of the rectifier circuit 12B, and to correct the output voltage based on the correction command value supplied from the correction control circuit 14B. . The DC/DC converter 15C is configured to generate DC power based on the output power of the rectifier circuit 12C, and to correct the output voltage based on the correction command value supplied from the correction control circuit 14C. The DC/DC converter 15D is configured to generate DC power based on the output power of the rectifier circuit 12D, and to correct the output voltage based on the correction command value supplied from the correction control circuit 14D. The output terminals of the four DC/DC converters 15A to 15D are connected to each other and to the power output terminal T.
　コンバータ制御回路１６は、４つのＤＣ／ＤＣコンバータ１５Ａ～１５Ｄの動作を制御するように構成される。具体的には、コンバータ制御回路１６は、例えば、４つのＤＣ／ＤＣコンバータ１５Ａ～１５Ｄが、互いに同じスイッチング周波数で、かつ互いに異なる位相でスイッチング動作を行うように、４つのＤＣ／ＤＣコンバータ１５Ａ～１５Ｄの動作を制御する。４つのＤＣ／ＤＣコンバータ１５Ａ～１５Ｄが、互いに同じスイッチング周波数でスイッチング動作を行うことにより、例えば、レクテナ装置１と負荷装置９との間にノイズ低減用のフィルタを設ける場合に、このフィルタは、スイッチング動作に起因するノイズを低減しやすくすることができる。また、４つのＤＣ／ＤＣコンバータ１５Ａ～１５Ｄが、互いに異なる位相でスイッチング動作を行うことにより、レクテナ装置１の出力電圧のリップルを低減することができる。 The converter control circuit 16 is configured to control the operations of the four DC/DC converters 15A to 15D. Specifically, the converter control circuit 16 controls the four DC/DC converters 15A to 15D so that, for example, the four DC/DC converters 15A to 15D perform switching operations at the same switching frequency and different phases. Controls the operation of 15D. When the four DC/DC converters 15A to 15D perform switching operations at the same switching frequency, for example, when a noise reduction filter is provided between the rectenna device 1 and the load device 9, this filter Noise caused by switching operations can be easily reduced. Further, by performing switching operations in different phases of the four DC/DC converters 15A to 15D, ripples in the output voltage of the rectenna device 1 can be reduced.
　電力出力端子Ｔは、４つのＤＣ／ＤＣコンバータ１５Ａ～１５Ｄが生成した電力を出力する端子であり、負荷装置９に接続される。 The power output terminal T is a terminal that outputs the power generated by the four DC/DC converters 15A to 15D, and is connected to the load device 9.
　図５は、整流回路１２Ａ、センサ回路１３Ａ、補正制御回路１４Ａ、およびＤＣ／ＤＣコンバータ１５Ａの一構成例を表すものである。なお、整流回路１２Ｂ、センサ回路１３Ｂ、補正制御回路１４Ｂ、およびＤＣ／ＤＣコンバータ１５Ｂについても同様であり、整流回路１２Ｃ、センサ回路１３Ｃ、補正制御回路１４Ｃ、およびＤＣ／ＤＣコンバータ１５Ｃについても同様であり、整流回路１２Ｄ、センサ回路１３Ｄ、補正制御回路１４Ｄ、およびＤＣ／ＤＣコンバータ１５Ｄについても同様である。 FIG. 5 shows an example of the configuration of the rectifier circuit 12A, the sensor circuit 13A, the correction control circuit 14A, and the DC/DC converter 15A. The same applies to the rectifier circuit 12B, sensor circuit 13B, correction control circuit 14B, and DC/DC converter 15B, and the same applies to the rectifier circuit 12C, sensor circuit 13C, correction control circuit 14C, and DC/DC converter 15C. The same applies to the rectifier circuit 12D, sensor circuit 13D, correction control circuit 14D, and DC/DC converter 15D.
　整流回路１２Ａは、温度センサ１９を有している。温度センサ１９は、整流回路１２Ａの回路温度Ｔ_rectを検出するように構成される。温度センサ１９は、例えば、サーミスタを用いて構成され、例えば、図２～４に示したダイオードの近くに配置される。温度センサ１９は、整流回路１２Ａの回路温度Ｔ_rectに応じた検出電圧を生成するようになっている。 The rectifier circuit 12A has a temperature sensor 19. The temperature sensor 19 is configured to detect the circuit temperature T_rect of the rectifier circuit 12A. Temperature sensor 19 is constructed using, for example, a thermistor, and is placed, for example, near the diode shown in FIGS. 2-4. The temperature sensor 19 is configured to generate a detection voltage according to the circuit temperature T_rect of the rectifier circuit 12A.
　センサ回路１３Ａは、抵抗素子２１，２２と、電流センサ２３とを有する。 The sensor circuit 13A includes resistance elements 21 and 22 and a current sensor 23.
　抵抗素子２１の一端は電圧線Ｌ１に接続され、他端は抵抗素子２２の一端に接続される。抵抗素子２２の一端は抵抗素子２１の他端に接続され、他端は基準電圧線Ｌ２に接続される。抵抗素子２１，２２は、抵抗分圧回路を構成し、整流回路１２Ａの出力電圧Ｖo_rectを分圧することにより、出力電圧Ｖo_rectに応じた検出電圧を生成するように構成される。 One end of the resistance element 21 is connected to the voltage line L1, and the other end is connected to one end of the resistance element 22. One end of the resistance element 22 is connected to the other end of the resistance element 21, and the other end is connected to the reference voltage line L2. The resistive elements 21 and 22 constitute a resistive voltage divider circuit, and are configured to divide the output voltage Vo_rect of the rectifier circuit 12A to generate a detection voltage according to the output voltage Vo_rect.
　電流センサ２３は、電圧線Ｌ１に設けられ、整流回路１２ＡからＤＣ／ＤＣコンバータ１５Ａに向かって流れる、整流回路１２Ａの出力電流Ｉo_rectを検出し、この出力電流Ｉo_rectに応じた検出電圧を生成するように構成される。 The current sensor 23 is provided on the voltage line L1, and is configured to detect the output current Io_rect of the rectifier circuit 12A flowing from the rectifier circuit 12A toward the DC/DC converter 15A, and to generate a detection voltage according to this output current Io_rect. It is composed of
　補正制御回路１４Ａは、補正指令値生成回路２６～２８を有している。 The correction control circuit 14A has correction command value generation circuits 26 to 28.
　補正指令値生成回路２６は、抵抗素子２１，２２により分圧された、整流回路１２Ａの出力電圧Ｖo_rectに応じた検出電圧に基づいて、ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcの補正量を示す補正指令値ΔＶａを生成するように構成される。具体的には、補正指令値生成回路２６は、以下の式ＥＱ１を用いて、補正指令値ΔＶａを生成する。
ΔＶａ　＝　α・Ｖo_rect　　…（ＥＱ１）
ここで、αはゲインファクタを示す係数である。補正指令値生成回路２６は、この式ＥＱ１を用いて、整流回路１２Ａの出力電圧Ｖo_rectに比例する補正指令値ΔＶａを生成するようになっている。 The correction command value generation circuit 26 performs a correction indicating the correction amount of the output voltage Vo_dcdc of the DC/DC converter 15A based on the detected voltage corresponding to the output voltage Vo_rect of the rectifier circuit 12A divided by the resistive elements 21 and 22. It is configured to generate a command value ΔVa. Specifically, the correction command value generation circuit 26 generates the correction command value ΔVa using the following equation EQ1.
ΔVa = α・Vo_rect…(EQ1)
Here, α is a coefficient indicating a gain factor. The correction command value generation circuit 26 uses this equation EQ1 to generate a correction command value ΔVa that is proportional to the output voltage Vo_rect of the rectifier circuit 12A.
　補正指令値生成回路２７は、電流センサ２３から供給された、整流回路１２Ａの出力電流Ｉo_rectに応じた検出電圧に基づいて、ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcの補正量を示す補正指令値ΔＶｂを生成するように構成される。具体的には、補正指令値生成回路２７は、以下の式ＥＱ２を用いて、補正指令値ΔＶｂを生成する。
ΔＶｂ　＝　β・Ｉo_rect　　…（ＥＱ２）
ここで、βはゲインファクタを示す係数である。補正指令値生成回路２７は、この式ＥＱ２を用いて、整流回路１２Ａの出力電流Ｉo_rectに比例する補正指令値ΔＶｂを生成するようになっている。 The correction command value generation circuit 27 generates a correction command value ΔVb indicating the amount of correction of the output voltage Vo_dcdc of the DC/DC converter 15A based on the detected voltage supplied from the current sensor 23 and corresponding to the output current Io_rect of the rectifier circuit 12A. configured to generate. Specifically, the correction command value generation circuit 27 generates the correction command value ΔVb using the following equation EQ2.
ΔVb = β・Io_rect…(EQ2)
Here, β is a coefficient indicating a gain factor. The correction command value generation circuit 27 uses this equation EQ2 to generate a correction command value ΔVb that is proportional to the output current Io_rect of the rectifier circuit 12A.
　補正指令値生成回路２８は、温度センサ１９から供給された、整流回路１２Ａの回路温度Ｔ_rectに応じた検出電圧に基づいて、ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcの補正量を示す補正指令値ΔＶｃを生成するように構成される。具体的には、補正指令値生成回路２８は、以下の式ＥＱ３を用いて、補正指令値ΔＶｃを生成する。
ΔＶｃ　＝　Θ・Ｔ_rect　　…（ＥＱ３）
ここで、Θはゲインファクタを示す係数である。補正指令値生成回路２８は、この式ＥＱ３を用いて、整流回路１２Ａの回路温度Ｔ_rectに比例する補正指令値ΔＶｃを生成するようになっている。 The correction command value generation circuit 28 generates a correction command value ΔVc indicating the amount of correction of the output voltage Vo_dcdc of the DC/DC converter 15A based on the detected voltage according to the circuit temperature T_rect of the rectifier circuit 12A supplied from the temperature sensor 19. configured to generate. Specifically, the correction command value generation circuit 28 generates the correction command value ΔVc using the following equation EQ3.
ΔVc = Θ・T_rect…(EQ3)
Here, Θ is a coefficient indicating a gain factor. The correction command value generation circuit 28 uses this equation EQ3 to generate a correction command value ΔVc that is proportional to the circuit temperature T_rect of the rectifier circuit 12A.
　ＤＣ／ＤＣコンバータ１５Ａは、キャパシタ３１と、トランジスタ３２，３３と、インダクタ３４と、抵抗素子３５，３６と、キャパシタ３７と、電圧指令値生成回路３８と、加算回路３９と、電圧生成回路４１と、演算増幅回路４２と、抵抗素子４３と、キャパシタ４４，４５と、コントローラ４６とを有する。 The DC/DC converter 15A includes a capacitor 31, transistors 32 and 33, an inductor 34, resistance elements 35 and 36, a capacitor 37, a voltage command value generation circuit 38, an addition circuit 39, and a voltage generation circuit 41. , an operational amplifier circuit 42, a resistance element 43, capacitors 44, 45, and a controller 46.
　キャパシタ３１の一端は電圧線Ｌ１に接続され、他端は基準電圧線Ｌ２に接続される。 One end of the capacitor 31 is connected to the voltage line L1, and the other end is connected to the reference voltage line L2.
　トランジスタ３２，３３は、例えばＮ型の電界効果トランジスタ（ＦＥＴ：Field Effect Transistor）を用いて構成される。トランジスタ３２，３３のそれぞれは、ソースに接続されたアノードと、ドレインに接続されたカソードとを有するダイオードを有している。なお、この例では、Ｎ型の電界効果トランジスタを用いたが、スイッチング素子であればどのようなものを用いてもよい。トランジスタ３２のゲートにはゲート信号Ｇ１が供給され、ドレインは電圧線Ｌ１に接続され、ソースは電圧線Ｌ４に接続される。トランジスタ３３のゲートにはゲート信号Ｇ２が供給され、ドレインは電圧線Ｌ４に接続され、ソースは基準電圧線Ｌ２に接続される。 The transistors 32 and 33 are configured using, for example, N-type field effect transistors (FETs). Each of transistors 32, 33 has a diode having an anode connected to a source and a cathode connected to a drain. Note that although an N-type field effect transistor is used in this example, any switching element may be used. The gate signal G1 is supplied to the gate of the transistor 32, the drain is connected to the voltage line L1, and the source is connected to the voltage line L4. The gate signal G2 is supplied to the gate of the transistor 33, the drain is connected to the voltage line L4, and the source is connected to the reference voltage line L2.
　インダクタ３４は、電圧線Ｌ４に設けられ、一端はトランジスタ３２のソースおよびトランジスタ３３のドレインに接続され、他端は抵抗素子３５の一端およびキャパシタ３７の一端に接続される。 The inductor 34 is provided on the voltage line L4, one end is connected to the source of the transistor 32 and the drain of the transistor 33, and the other end is connected to one end of the resistive element 35 and one end of the capacitor 37.
　抵抗素子３５の一端は電圧線Ｌ４に接続され、他端は抵抗素子３６の一端に接続される。抵抗素子３６の一端は抵抗素子３５の他端に接続され、他端は基準電圧線Ｌ２に接続される。抵抗素子３５，３６は、抵抗分圧回路を構成し、ＤＣ／ＤＣコンバータ１５の出力電圧Ｖo_dcdcを分圧することにより、出力電圧Ｖo_dcdcに応じた検出電圧を生成するように構成される。 One end of the resistance element 35 is connected to the voltage line L4, and the other end is connected to one end of the resistance element 36. One end of the resistance element 36 is connected to the other end of the resistance element 35, and the other end is connected to the reference voltage line L2. The resistive elements 35 and 36 constitute a resistive voltage divider circuit, and are configured to divide the output voltage Vo_dcdc of the DC/DC converter 15 to generate a detection voltage according to the output voltage Vo_dcdc.
　キャパシタ３７の一端は電圧線Ｌ４に接続され、他端は基準電圧線Ｌ２に接続される。 One end of the capacitor 37 is connected to the voltage line L4, and the other end is connected to the reference voltage line L2.
　電圧指令値生成回路３８は、ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcのリファレンス電圧を示す電圧指令値Ｖrefを生成するように構成される。 The voltage command value generation circuit 38 is configured to generate a voltage command value Vref indicating a reference voltage of the output voltage Vo_dcdc of the DC/DC converter 15A.
　加算回路３９は、リファレンス電圧の電圧指令値Ｖrefに対して、補正指令値ΔＶａ，ΔＶｂ，ΔＶｃを用いて補正を行うことにより、目標電圧の電圧指令値Ｖref1を生成するように構成される。具体的には、加算回路３９は、この例では、以下の式ＥＱ４を用いて、目標電圧の電圧指令値Ｖref1を生成する。
Ｖref1　＝　Ｖref　＋　ΔＶａ　－　ΔＶｂ　－　ΔＶｃ　　…（ＥＱ４） The addition circuit 39 is configured to generate a voltage command value Vref1 of the target voltage by correcting the voltage command value Vref of the reference voltage using the correction command values ΔVa, ΔVb, and ΔVc. Specifically, in this example, the addition circuit 39 generates the voltage command value Vref1 of the target voltage using the following equation EQ4.
Vref1 = Vref + ΔVa - ΔVb - ΔVc...(EQ4)
　電圧生成回路４１は、目標電圧の電圧指令値Ｖref1に基づいて、電圧Ｖvrを生成するように構成される。演算増幅回路４２の正入力端子には、電圧Ｖvrが供給され、負入力端子には抵抗素子３５，３６により分圧された、出力電圧Ｖo_dcdcに応じた検出電圧が供給される。抵抗素子４３の一端は演算増幅回路４２の負入力端子に接続され、他端はキャパシタ４４の一端に接続される。キャパシタ４４の一端は抵抗素子４３の他端に接続され、他端は演算増幅回路４２の出力端子に接続される。キャパシタ４４の一端は演算増幅回路４２の負入力端子に接続され、他端は演算増幅回路４２の出力端子に接続される。演算増幅回路４２は、制御電圧を生成し、この制御電圧を、コントローラ４６に供給するようになっている。 The voltage generation circuit 41 is configured to generate the voltage Vvr based on the voltage command value Vref1 of the target voltage. A voltage Vvr is supplied to the positive input terminal of the operational amplifier circuit 42, and a detection voltage corresponding to the output voltage Vo_dcdc, which is divided by the resistive elements 35 and 36, is supplied to the negative input terminal. One end of the resistive element 43 is connected to the negative input terminal of the operational amplifier circuit 42, and the other end is connected to one end of the capacitor 44. One end of the capacitor 44 is connected to the other end of the resistance element 43, and the other end is connected to the output terminal of the operational amplifier circuit 42. One end of the capacitor 44 is connected to the negative input terminal of the operational amplifier circuit 42, and the other end is connected to the output terminal of the operational amplifier circuit 42. The operational amplifier circuit 42 generates a control voltage and supplies this control voltage to the controller 46.
　コントローラ４６は、演算増幅回路４２から供給された制御電圧に基づいて、ＤＣ／ＤＣコンバータ１５Ａの動作を制御するように構成される。具体的には、コントローラ４６は、演算増幅回路４２から供給された制御電圧に基づいてゲート信号Ｇ１，Ｇ２を生成し、ゲート信号Ｇ１，Ｇ２を用いてトランジスタ３２，３３のスイッチング動作を制御することにより、ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcが目標電圧になるように制御するようになっている。コントローラ４６は、例えばＭＣＵ（Micro Controller Unit）を用いて構成される。 The controller 46 is configured to control the operation of the DC/DC converter 15A based on the control voltage supplied from the operational amplifier circuit 42. Specifically, the controller 46 generates gate signals G1 and G2 based on the control voltage supplied from the operational amplifier circuit 42, and controls the switching operations of the transistors 32 and 33 using the gate signals G1 and G2. Accordingly, the output voltage Vo_dcdc of the DC/DC converter 15A is controlled to become the target voltage. The controller 46 is configured using, for example, an MCU (Micro Controller Unit).
　次に、レクテナ装置１の実装例について説明する。 Next, an implementation example of the rectenna device 1 will be described.
　図６，７は、レクテナ装置１における、４つのアンテナ１１、４つの整流回路１２、４つのセンサ回路１３、４つの補正制御回路１４、および４つのＤＣ／ＤＣコンバータ１５の実装例を表すものである。４つのアンテナ１１、４つの整流回路１２、４つのセンサ回路１３、４つの補正制御回路１４、および４つのＤＣ／ＤＣコンバータ１５は、この例ではプリント基板である基板１００に実装される。図６は、基板１００の基板面１００Ａを示し、図７は、基板１００の、基板面１００Ａとは反対の基板面１００Ｂを示す。 6 and 7 represent implementation examples of four antennas 11, four rectifier circuits 12, four sensor circuits 13, four correction control circuits 14, and four DC/DC converters 15 in the rectenna device 1. be. Four antennas 11, four rectifier circuits 12, four sensor circuits 13, four correction control circuits 14, and four DC/DC converters 15 are mounted on a substrate 100, which is a printed circuit board in this example. FIG. 6 shows a substrate side 100A of the substrate 100, and FIG. 7 shows a substrate side 100B of the substrate 100 opposite to the substrate side 100A.
　この例では、４つのアンテナ１１は基板面１００Ａに実装され、４つの整流回路１２、４つのセンサ回路１３、４つの補正制御回路１４、および４つのＤＣ／ＤＣコンバータ１５は基板面１００Ｂに実装される。 In this example, four antennas 11 are mounted on the substrate surface 100A, and four rectifier circuits 12, four sensor circuits 13, four correction control circuits 14, and four DC/DC converters 15 are mounted on the substrate surface 100B. Ru.
　図６に示したように、基板面１００Ａにおいて、４つのアンテナ１１は、この例では２行２列で配置される。４つのアンテナ１１は、伝送線路１０２を介して互いに接続され、給電点１０１に導かれる。この伝送線路１０２により、４つのアンテナ１１のそれぞれから出力された電力が結合され、給電点１０１に供給される。給電点１０１では、基板面１００Ａに配置された伝送線路１０２と、基板面１００Ｂに配置された伝送線路１０３が、基板１００に設けられた図示しないビアを介して互いに接続される。 As shown in FIG. 6, on the substrate surface 100A, the four antennas 11 are arranged in two rows and two columns in this example. The four antennas 11 are connected to each other via a transmission line 102 and guided to a feeding point 101. The transmission line 102 combines the power output from each of the four antennas 11 and supplies the combined power to the feed point 101 . At the feed point 101, a transmission line 102 arranged on the substrate surface 100A and a transmission line 103 arranged on the substrate surface 100B are connected to each other via a via (not shown) provided in the substrate 100.
　図７に示したように、基板面１００Ｂにおいて、整流回路１２、センサ回路１３、補正制御回路１４、およびＤＣ／ＤＣコンバータ１５を含む４つの回路群は、この例では２行２列で配置される。４つの整流回路１２は、伝送線路１０３を介して互いに接続され、給電点１０１に導かれる。このレクテナ装置１では、４つのアンテナ１１から供給された電力は、この伝送線路１０３により分配され、４つの整流回路１２Ａ～１２Ｄに供給される。伝送線路１０３は、４つの整流回路１２Ａ～１２Ｄに供給される電力が、互いに等しくなるように電力を分配する。例えば、給電点１０１から整流回路１２Ａに至る伝送線路、および給電点１０１から整流回路１２Ｃに至る伝送線路は、互いに対称な形状を有する。また、給電点１０１から整流回路１２Ｂに至る伝送線路、および給電点１０１から整流回路１２Ｄに至る伝送線路は、互いに対称な形状を有する。 As shown in FIG. 7, on the substrate surface 100B, four circuit groups including the rectifier circuit 12, the sensor circuit 13, the correction control circuit 14, and the DC/DC converter 15 are arranged in two rows and two columns in this example. Ru. The four rectifier circuits 12 are connected to each other via a transmission line 103 and guided to a feeding point 101. In this rectenna device 1, power supplied from four antennas 11 is distributed by this transmission line 103 and supplied to four rectifier circuits 12A to 12D. Transmission line 103 distributes power so that the power supplied to four rectifier circuits 12A to 12D is equal to each other. For example, the transmission line from the feed point 101 to the rectifier circuit 12A and the transmission line from the feed point 101 to the rectifier circuit 12C have shapes that are symmetrical to each other. Further, the transmission line from the feed point 101 to the rectifier circuit 12B and the transmission line from the feed point 101 to the rectifier circuit 12D have mutually symmetrical shapes.
　なお、この例では、図７に示したように、整流回路１２を１つの回路として構成し、センサ回路１３および補正制御回路１４を１つの回路として構成し、ＤＣ／ＤＣコンバータ１５を１つの回路として構成したが、これに限定されるものではない。例えば、整流回路１２、センサ回路１３、補正制御回路１４、およびＤＣ／ＤＣコンバータ１５を１つの回路として構成してもよい。 In this example, as shown in FIG. 7, the rectifier circuit 12 is configured as one circuit, the sensor circuit 13 and the correction control circuit 14 are configured as one circuit, and the DC/DC converter 15 is configured as one circuit. Although it is configured as follows, it is not limited to this. For example, the rectifier circuit 12, the sensor circuit 13, the correction control circuit 14, and the DC/DC converter 15 may be configured as one circuit.
　また、この例では、４つのアンテナ１１を基板面１００Ａに実装し、４つの整流回路１２、４つのセンサ回路１３、４つの補正制御回路１４、および４つのＤＣ／ＤＣコンバータ１５を基板面１００Ｂに実装したが、これに限定されるものではない。これに代えて、例えば、４つのアンテナ１１、４つの整流回路１２、４つのセンサ回路１３、４つの補正制御回路１４、および４つのＤＣ／ＤＣコンバータ１５を、同じ基板面に実装してもよい。 In this example, four antennas 11 are mounted on the substrate surface 100A, and four rectifier circuits 12, four sensor circuits 13, four correction control circuits 14, and four DC/DC converters 15 are mounted on the substrate surface 100B. Although implemented, it is not limited to this. Alternatively, for example, four antennas 11, four rectifier circuits 12, four sensor circuits 13, four correction control circuits 14, and four DC/DC converters 15 may be mounted on the same substrate surface. .
　ここで、アンテナ部１０は、本開示における「アンテナ部」の一具体例に対応する。アンテナ１１は、本開示における「アンテナ」の一具体例に対応する。整流回路１２は、本開示における「整流回路」の一具体例に対応する。補正制御回路１４は、本開示における「補正制御回路」の一具体例に対応する。出力電圧Ｖo_rectは、本開示における「整流回路の出力電圧」の一具体例に対応する。出力電流Ｉo_rectは、本開示における「出力電流」の一具体例に対応する。回路温度Ｔ_rectは、本開示における「回路温度」の一具体例に対応する。補正指令値ΔＶａは、本開示における「第１の補正指令値」の一具体例に対応する。補正指令値ΔＶｂは、本開示における「第２の補正指令値」の一具体例に対応する。補正指令値ΔＶｃは、本開示における「第３の補正指令値」の一具体例に対応する。ＤＣ／ＤＣコンバータ１５は、本開示における「電力変換回路」の一具体例に対応する。出力電圧Ｖo_dcdcは、本開示における「電力変換回路の出力電圧」の一具体例に対応する。コンバータ制御回路１６は、本開示における「電力変換制御回路」の一具体例に対応する。電力出力端子Ｔは、本開示における「電力出力端子」の一具体例に対応する。 Here, the antenna section 10 corresponds to a specific example of the "antenna section" in the present disclosure. The antenna 11 corresponds to a specific example of "antenna" in the present disclosure. The rectifier circuit 12 corresponds to a specific example of a "rectifier circuit" in the present disclosure. The correction control circuit 14 corresponds to a specific example of a "correction control circuit" in the present disclosure. The output voltage Vo_rect corresponds to a specific example of "output voltage of a rectifier circuit" in the present disclosure. The output current Io_rect corresponds to a specific example of "output current" in the present disclosure. The circuit temperature T_rect corresponds to a specific example of "circuit temperature" in the present disclosure. The correction command value ΔVa corresponds to a specific example of the "first correction command value" in the present disclosure. The correction command value ΔVb corresponds to a specific example of the "second correction command value" in the present disclosure. The correction command value ΔVc corresponds to a specific example of the "third correction command value" in the present disclosure. The DC/DC converter 15 corresponds to a specific example of a "power conversion circuit" in the present disclosure. The output voltage Vo_dcdc corresponds to a specific example of "output voltage of the power conversion circuit" in the present disclosure. Converter control circuit 16 corresponds to a specific example of a "power conversion control circuit" in the present disclosure. The power output terminal T corresponds to a specific example of a "power output terminal" in the present disclosure.
［動作および作用］
　続いて、本実施の形態のレクテナ装置１の動作および作用について説明する。 [Operation and effect]
Next, the operation and effect of the rectenna device 1 of this embodiment will be explained.
（全体動作概要）
　まず、図１を参照して、レクテナ装置１の全体動作概要を説明する。アンテナ部１０は、マイクロ波を受信する。例えば、整流回路１２Ａは、アンテナ部１０から供給された電力信号を整流する。また、整流回路１２Ａは、整流回路１２Ａの回路温度Ｔ_rectを検出し、その検出結果を補正制御回路１４Ａに供給する。センサ回路１３Ａは、整流回路１２Ａの出力電圧Ｖo_rectおよび出力電流Ｉo_rectを検出し、その検出結果を補正制御回路１４Ａに供給する。補正制御回路１４Ａは、センサ回路１３Ａから供給された整流回路１２Ａの出力電圧Ｖo_rectおよび出力電流Ｉo_rectの検出結果、および整流回路１２Ａから供給された回路温度Ｔ_rectの検出結果に基づいて、ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcの補正量を示す補正指令値を生成する。ＤＣ／ＤＣコンバータ１５Ａは、整流回路１２Ａの出力電力に基づいて直流電力を生成するとともに、補正制御回路１４Ａから供給された補正指令値に基づいてＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcを補正する。整流回路１２Ｂ、センサ回路１３Ｂ、補正制御回路１４Ｂ、およびＤＣ／ＤＣコンバータ１５Ｂについても同様であり、整流回路１２Ｃ、センサ回路１３Ｃ、補正制御回路１４Ｃ、およびＤＣ／ＤＣコンバータ１５Ｃについても同様であり、整流回路１２Ｄ、センサ回路１３Ｄ、補正制御回路１４Ｄ、およびＤＣ／ＤＣコンバータ１５Ｄについても同様である。コンバータ制御回路１６は、４つのＤＣ／ＤＣコンバータ１５Ａ～１５Ｄが、互いに同じスイッチング周波数で、かつ互いに異なる位相でスイッチング動作を行うように、４つのＤＣ／ＤＣコンバータ１５Ａ～１５Ｄの動作を制御する。レクテナ装置１は、電力出力端子Ｔを介して、４つのＤＣ／ＤＣコンバータ１５Ａ～１５Ｄが生成した直流電力を負荷装置９に供給する。 (Overview of overall operation)
First, an overview of the overall operation of the rectenna device 1 will be explained with reference to FIG. Antenna section 10 receives microwaves. For example, the rectifier circuit 12A rectifies the power signal supplied from the antenna section 10. Further, the rectifier circuit 12A detects the circuit temperature T_rect of the rectifier circuit 12A, and supplies the detection result to the correction control circuit 14A. The sensor circuit 13A detects the output voltage Vo_rect and the output current Io_rect of the rectifier circuit 12A, and supplies the detection results to the correction control circuit 14A. The correction control circuit 14A controls the DC/DC converter based on the detection results of the output voltage Vo_rect and the output current Io_rect of the rectifier circuit 12A supplied from the sensor circuit 13A, and the detection result of the circuit temperature T_rect supplied from the rectification circuit 12A. A correction command value indicating the correction amount of the output voltage Vo_dcdc of 15A is generated. The DC/DC converter 15A generates DC power based on the output power of the rectifier circuit 12A, and corrects the output voltage Vo_dcdc of the DC/DC converter 15A based on the correction command value supplied from the correction control circuit 14A. The same applies to the rectifier circuit 12B, sensor circuit 13B, correction control circuit 14B, and DC/DC converter 15B, and the same applies to the rectifier circuit 12C, sensor circuit 13C, correction control circuit 14C, and DC/DC converter 15C. The same applies to the rectifier circuit 12D, the sensor circuit 13D, the correction control circuit 14D, and the DC/DC converter 15D. The converter control circuit 16 controls the operation of the four DC/DC converters 15A to 15D so that the four DC/DC converters 15A to 15D perform switching operations at the same switching frequency and different phases. Rectenna device 1 supplies DC power generated by four DC/DC converters 15A to 15D to load device 9 via power output terminal T.
（詳細動作）
　図６，７に示したように、アンテナ１１Ａ～１１Ｄのそれぞれから出力された電力は一旦結合され、結合された電力は４つの整流回路１２Ａ～１２Ｄに分配される。例えば、伝送線路１０３における４つの整流回路１２Ａ～１２Ｄへの経路の特性ばらつきや、４つの整流回路１２Ａ～１２Ｄの特性ばらつきにより、４つの整流回路１２Ａ～１２Ｄのいずれか１つに多くの電流が流れることがあり得る。例えば、整流回路１２Ａ～１２Ｄのいずれか１つに過大な電流が流れた場合には、その整流回路１２におけるダイオードの特性が劣化し、あるいはダイオードが故障する可能性がある。 (Detailed operation)
As shown in FIGS. 6 and 7, the power output from each of the antennas 11A to 11D is once combined, and the combined power is distributed to the four rectifier circuits 12A to 12D. For example, due to variations in the characteristics of the paths to the four rectifier circuits 12A to 12D in the transmission line 103 or variations in the characteristics of the four rectifier circuits 12A to 12D, a large amount of current flows into one of the four rectifier circuits 12A to 12D. It can flow. For example, if an excessive current flows through any one of the rectifier circuits 12A to 12D, the characteristics of the diode in the rectifier circuit 12 may deteriorate or the diode may fail.
　レクテナ装置１では、例えば、補正制御回路１４Ａは、センサ回路１３Ａから供給された整流回路１２Ａの出力電圧Ｖo_rectおよび出力電流Ｉo_rectの検出結果、および整流回路１２Ａから供給された回路温度Ｔ_rectの検出結果に基づいて、ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcの補正量を示す補正指令値を生成する。ＤＣ／ＤＣコンバータ１５Ａは、補正制御回路１４Ａから供給された補正指令値に基づいて、出力電圧を補正する。これにより、レクテナ装置１では、整流回路１２Ａのダイオードを保護することができる。以下に、この動作について詳細に説明する。 In the rectenna device 1, for example, the correction control circuit 14A uses the detection results of the output voltage Vo_rect and output current Io_rect of the rectifier circuit 12A supplied from the sensor circuit 13A, and the detection result of the circuit temperature T_rect supplied from the rectifier circuit 12A. Based on this, a correction command value indicating the amount of correction of the output voltage Vo_dcdc of the DC/DC converter 15A is generated. The DC/DC converter 15A corrects the output voltage based on the correction command value supplied from the correction control circuit 14A. Thereby, in the rectenna device 1, the diode of the rectifier circuit 12A can be protected. This operation will be explained in detail below.
（出力電圧Ｖo_rectに基づく補正動作）
　図８は、整流回路１２Ａの出力電圧Ｖo_rectに基づく、ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcの補正動作を表すものである。 (Correction operation based on output voltage Vo_rect)
FIG. 8 shows a correction operation of the output voltage Vo_dcdc of the DC/DC converter 15A based on the output voltage Vo_rect of the rectifier circuit 12A.
　補正指令値生成回路２６は、式ＥＱ１を用いて、整流回路１２Ａの出力電圧Ｖo_rectに基づいて、補正指令値ΔＶａを生成する。加算回路３９は、式ＥＱ４を用いて、目標電圧の電圧指令値Ｖref1を生成する。これにより、ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcは、図８に示したように、整流回路１２Ａの出力電圧Ｖo_rectが高くなるほど高くなる。具体的には、ＤＣ／ＤＣコンバータ１５Ａは、整流回路１２Ａの出力電圧Ｖo_rectが電圧Ｖ１である場合にＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcを電圧Ｖｏ１にし、整流回路１２Ａの出力電圧Ｖo_rectが電圧Ｖ１より高い電圧Ｖ２である場合にＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcを電圧Ｖｏ１より高い電圧Ｖｏ２にする。これにより、レクテナ装置１では、以下に説明するように、整流回路１２Ａのダイオードを保護しつつ、負荷装置９に対して協調して直流電力を供給することができる。 The correction command value generation circuit 26 uses equation EQ1 to generate a correction command value ΔVa based on the output voltage Vo_rect of the rectifier circuit 12A. The addition circuit 39 generates the voltage command value Vref1 of the target voltage using equation EQ4. Thereby, as shown in FIG. 8, the output voltage Vo_dcdc of the DC/DC converter 15A increases as the output voltage Vo_rect of the rectifier circuit 12A increases. Specifically, when the output voltage Vo_rect of the rectifier circuit 12A is the voltage V1, the DC/DC converter 15A sets the output voltage Vo_dcdc of the DC/DC converter 15A to the voltage Vo1, and the output voltage Vo_rect of the rectifier circuit 12A becomes the voltage V1. When the voltage V2 is higher, the output voltage Vo_dcdc of the DC/DC converter 15A is set to a voltage Vo2 higher than the voltage Vo1. Thereby, the rectenna device 1 can cooperatively supply DC power to the load device 9 while protecting the diode of the rectifier circuit 12A, as described below.
　図９は、受電電力が所定の値である場合における、整流回路１２Ａの出力電圧Ｖo_rectおよび出力電流Ｉo_rectの関係を示す特性を表すものである。特性Ｗ１は、受電電力が電力Ｐ１である場合の特性を示し、特性Ｗ２は、受電電力が電力Ｐ１よりも大きい電力Ｐ２である場合の特性を示し、特性Ｗ３は、受電電力が電力Ｐ１よりも小さい電力Ｐ３である場合の特性を示す。受電電力が一定である場合には、整流回路１２Ａの出力電圧Ｖo_rectが高いほど、整流回路１２Ａの出力電流Ｉo_rectは少なく、整流回路１２Ａの出力電圧Ｖo_rectが低いほど、整流回路１２Ａの出力電流Ｉo_rectは多い。 FIG. 9 shows characteristics showing the relationship between the output voltage Vo_rect and the output current Io_rect of the rectifier circuit 12A when the received power is a predetermined value. Characteristic W1 shows the characteristic when the received power is power P1, characteristic W2 shows the characteristic when the received power is power P2 which is larger than power P1, and characteristic W3 shows the characteristic when the received power is power P2 which is larger than power P1. The characteristics when the power is small P3 are shown. When the received power is constant, the higher the output voltage Vo_rect of the rectifier circuit 12A, the lower the output current Io_rect of the rectifier circuit 12A, and the lower the output voltage Vo_rect of the rectifier circuit 12A, the lower the output current Io_rect of the rectifier circuit 12A. many.
　例えば、整流回路１２Ａの出力電圧Ｖo_rectが低い場合には、整流回路１２Ａの出力電流Ｉo_rectは多い。このように整流回路１２Ａの出力電流Ｉo_rectが多い場合には、整流回路１２Ａのダイオードでは、電流容量の観点から余裕が少ない。例えば、出力電流Ｉo_rectが過大である場合には、整流回路１２Ａにおけるダイオードの特性が劣化し、あるいはダイオードが故障する可能性がある。よって、ＤＣ／ＤＣコンバータ１５Ａは、整流回路１２Ａの出力電圧Ｖo_rectが低いほど、出力電圧Ｖo_dcdcを低くする。ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcが低くなると、ＤＣ／ＤＣコンバータ１５Ａの出力電流が低下し、その低下分を補うように、ＤＣ／ＤＣコンバータ１５Ｂ，１５Ｃ，１５Ｄの出力電流が増加する。このようにＤＣ／ＤＣコンバータ１５Ａの出力電流が少なくなると、ＤＣ／ＤＣコンバータ１５Ａの入力電流が少なくなり、整流回路１２Ａの出力電流Ｉo_rectが少なくなる。このようにして、レクテナ装置１では、整流回路１２Ａの出力電流Ｉo_rectを低く抑えることができ、整流回路１２Ａのダイオードを保護することができる。そして、レクテナ装置１では、４つのＤＣ／ＤＣコンバータ１５Ａ～１５Ｄが、負荷装置９に対して協調して直流電力を供給することができる。 For example, when the output voltage Vo_rect of the rectifier circuit 12A is low, the output current Io_rect of the rectifier circuit 12A is large. When the output current Io_rect of the rectifier circuit 12A is large as described above, the diodes of the rectifier circuit 12A have little margin in terms of current capacity. For example, if the output current Io_rect is excessive, the characteristics of the diode in the rectifier circuit 12A may deteriorate or the diode may fail. Therefore, the DC/DC converter 15A lowers the output voltage Vo_dcdc as the output voltage Vo_rect of the rectifier circuit 12A becomes lower. When the output voltage Vo_dcdc of the DC/DC converter 15A decreases, the output current of the DC/DC converter 15A decreases, and the output currents of the DC/ DC converters 15B, 15C, and 15D increase to compensate for the decrease. When the output current of the DC/DC converter 15A decreases in this way, the input current of the DC/DC converter 15A decreases, and the output current Io_rect of the rectifier circuit 12A decreases. In this way, in the rectenna device 1, the output current Io_rect of the rectifier circuit 12A can be suppressed low, and the diode of the rectifier circuit 12A can be protected. In the rectenna device 1, the four DC/DC converters 15A to 15D can cooperatively supply DC power to the load device 9.
　一方、例えば、整流回路１２Ａの出力電圧Ｖo_rectが高い場合には、整流回路１２Ａの出力電流Ｉo_rectは少ない。このように整流回路１２Ａの出力電流Ｉo_rectが少ない場合には、整流回路１２Ａのダイオードでは、電流容量の観点から余裕があり、より多くの電流を流すことができる。よって、ＤＣ／ＤＣコンバータ１５Ａは、整流回路１２Ａの出力電圧Ｖo_rectが高いほど、出力電圧Ｖo_dcdcを高くする。ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcが高くなると、ＤＣ／ＤＣコンバータ１５Ａの出力電流が多くなり、その増加分だけ、ＤＣ／ＤＣコンバータ１５Ｂ，１５Ｃ，１５Ｄの出力電流が低下する。このようにＤＣ／ＤＣコンバータ１５Ａの出力電流が多くなると、ＤＣ／ＤＣコンバータ１５Ａの入力電流が多くなり、整流回路１２Ａの出力電流Ｉo_rectが多くなる。このようにして、レクテナ装置１では、４つのＤＣ／ＤＣコンバータ１５Ａ～１５Ｄが、負荷装置９に対して協調して直流電力を供給することができる。 On the other hand, for example, when the output voltage Vo_rect of the rectifier circuit 12A is high, the output current Io_rect of the rectifier circuit 12A is small. In this way, when the output current Io_rect of the rectifier circuit 12A is small, the diodes of the rectifier circuit 12A have a margin in terms of current capacity and can allow more current to flow. Therefore, the DC/DC converter 15A increases the output voltage Vo_dcdc as the output voltage Vo_rect of the rectifier circuit 12A increases. When the output voltage Vo_dcdc of the DC/DC converter 15A increases, the output current of the DC/DC converter 15A increases, and the output currents of the DC/ DC converters 15B, 15C, and 15D decrease by the increased amount. When the output current of the DC/DC converter 15A increases in this way, the input current of the DC/DC converter 15A increases, and the output current Io_rect of the rectifier circuit 12A increases. In this way, in the rectenna device 1, the four DC/DC converters 15A to 15D can cooperate to supply DC power to the load device 9.
（出力電流Ｉo_rectに基づく補正動作）
　図１０は、整流回路１２Ａの出力電流Ｉo_rectに基づく、ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcの補正動作を表すものである。 (Correction operation based on output current Io_rect)
FIG. 10 shows a correction operation for the output voltage Vo_dcdc of the DC/DC converter 15A based on the output current Io_rect of the rectifier circuit 12A.
　補正指令値生成回路２７は、式ＥＱ２を用いて、整流回路１２Ａの出力電流Ｉo_rectに基づいて、補正指令値ΔＶｂを生成する。加算回路３９は、式ＥＱ４を用いて、目標電圧の電圧指令値Ｖref1を生成する。これにより、ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcは、図１０に示したように、整流回路１２Ａの出力電流Ｉo_rectが多くなるほど高くなる。具体的には、ＤＣ／ＤＣコンバータ１５Ａは、整流回路１２Ａの出力電流Ｉo_rectが電流Ｉ１である場合にＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcを電圧Ｖｏ３にし、整流回路１２Ａの出力電流Ｉo_rectが電流Ｉ１より多い電流Ｉ２である場合にＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcを電圧Ｖｏ３より低い電圧Ｖｏ４にする。これにより、レクテナ装置１では、以下に説明するように、整流回路１２Ａのダイオードを保護しつつ、負荷装置９に対して協調して直流電力を供給することができる。 The correction command value generation circuit 27 uses equation EQ2 to generate a correction command value ΔVb based on the output current Io_rect of the rectifier circuit 12A. The addition circuit 39 generates the voltage command value Vref1 of the target voltage using equation EQ4. Thereby, as shown in FIG. 10, the output voltage Vo_dcdc of the DC/DC converter 15A increases as the output current Io_rect of the rectifier circuit 12A increases. Specifically, when the output current Io_rect of the rectifier circuit 12A is the current I1, the DC/DC converter 15A sets the output voltage Vo_dcdc of the DC/DC converter 15A to the voltage Vo3, and the output current Io_rect of the rectifier circuit 12A becomes the current I1. When the current I2 is larger, the output voltage Vo_dcdc of the DC/DC converter 15A is set to a voltage Vo4 lower than the voltage Vo3. Thereby, the rectenna device 1 can cooperatively supply DC power to the load device 9 while protecting the diode of the rectifier circuit 12A, as described below.
　すなわち、例えば、整流回路１２Ａの出力電流Ｉo_rectが多い場合には、整流回路１２Ａのダイオードでは、電流容量の観点から余裕が少ない。例えば、出力電流Ｉo_rectが過大である場合には、整流回路１２Ａにおけるダイオードの特性が劣化し、あるいはダイオードが故障する可能性がある。よって、ＤＣ／ＤＣコンバータ１５Ａは、整流回路１２Ａの出力電流Ｉo_rectが多いほど、出力電圧Ｖo_dcdcを低くする。ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcが低くなると、ＤＣ／ＤＣコンバータ１５Ａの出力電流が低下し、その低下分を補うように、ＤＣ／ＤＣコンバータ１５Ｂ，１５Ｃ，１５Ｄの出力電流が増加する。このようにＤＣ／ＤＣコンバータ１５Ａの出力電流が少なくなると、ＤＣ／ＤＣコンバータ１５Ａの入力電流が少なくなり、整流回路１２Ａの出力電流Ｉo_rectが少なくなる。このようにして、レクテナ装置１では、整流回路１２Ａの出力電流Ｉo_rectを低く抑えることができ、整流回路１２Ａのダイオードを保護することができる。そして、レクテナ装置１では、４つのＤＣ／ＤＣコンバータ１５Ａ～１５Ｄが、負荷装置９に対して協調して直流電力を供給することができる。 That is, for example, when the output current Io_rect of the rectifier circuit 12A is large, the diodes of the rectifier circuit 12A have little margin in terms of current capacity. For example, if the output current Io_rect is excessive, the characteristics of the diode in the rectifier circuit 12A may deteriorate or the diode may fail. Therefore, the DC/DC converter 15A lowers the output voltage Vo_dcdc as the output current Io_rect of the rectifier circuit 12A increases. When the output voltage Vo_dcdc of the DC/DC converter 15A decreases, the output current of the DC/DC converter 15A decreases, and the output currents of the DC/ DC converters 15B, 15C, and 15D increase to compensate for the decrease. When the output current of the DC/DC converter 15A decreases in this way, the input current of the DC/DC converter 15A decreases, and the output current Io_rect of the rectifier circuit 12A decreases. In this way, in the rectenna device 1, the output current Io_rect of the rectifier circuit 12A can be suppressed low, and the diode of the rectifier circuit 12A can be protected. In the rectenna device 1, the four DC/DC converters 15A to 15D can cooperatively supply DC power to the load device 9.
　一方、例えば、整流回路１２Ａの出力電流Ｉo_rectが少ない場合には、整流回路１２Ａのダイオードでは、電流容量の観点から余裕があり、より多くの電流を流すことができる。よって、ＤＣ／ＤＣコンバータ１５Ａは、整流回路１２Ａの出力電流Ｉo_rectが少ないほど、出力電圧Ｖo_dcdcを高くする。ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcが高くなると、ＤＣ／ＤＣコンバータ１５Ａの出力電流が多くなり、その増加分だけ、ＤＣ／ＤＣコンバータ１５Ｂ，１５Ｃ，１５Ｄの出力電流が低下する。このようにＤＣ／ＤＣコンバータ１５Ａの出力電流が多くなると、ＤＣ／ＤＣコンバータ１５Ａの入力電流が多くなり、整流回路１２Ａの出力電流Ｉo_rectが多くなる。このようにして、レクテナ装置１では、４つのＤＣ／ＤＣコンバータ１５Ａ～１５Ｄが、負荷装置９に対して協調して直流電力を供給することができる。 On the other hand, for example, when the output current Io_rect of the rectifier circuit 12A is small, the diodes of the rectifier circuit 12A have a margin in terms of current capacity and can allow more current to flow. Therefore, the DC/DC converter 15A increases the output voltage Vo_dcdc as the output current Io_rect of the rectifier circuit 12A decreases. When the output voltage Vo_dcdc of the DC/DC converter 15A increases, the output current of the DC/DC converter 15A increases, and the output currents of the DC/ DC converters 15B, 15C, and 15D decrease by the increased amount. When the output current of the DC/DC converter 15A increases in this way, the input current of the DC/DC converter 15A increases, and the output current Io_rect of the rectifier circuit 12A increases. In this way, in the rectenna device 1, the four DC/DC converters 15A to 15D can cooperate to supply DC power to the load device 9.
（回路温度Ｔ_rectに基づく補正動作）
　図１１は、整流回路１２Ａの回路温度Ｔ_rectに基づく、ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcの補正動作を表すものである。 (Correction operation based on circuit temperature T_rect)
FIG. 11 shows a correction operation of the output voltage Vo_dcdc of the DC/DC converter 15A based on the circuit temperature T_rect of the rectifier circuit 12A.
　補正指令値生成回路２８は、式ＥＱ３を用いて、整流回路１２Ａの回路温度Ｔ_rectに基づいて、補正指令値ΔＶｃを生成する。加算回路３９は、式ＥＱ４を用いて、目標電圧の電圧指令値Ｖref1を生成する。これにより、ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcは、図１１に示したように、整流回路１２Ａの回路温度Ｔ_rectが高くなるほど低くなる。具体的には、ＤＣ／ＤＣコンバータ１５Ａは、整流回路１２Ａの回路温度Ｔ_rectが温度Ｔ１である場合にＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcを電圧Ｖｏ５にし、整流回路１２Ａの回路温度Ｔo_rectが温度Ｔ１より高い温度Ｔ２である場合にＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcを電圧Ｖｏ５より低い電圧Ｖｏ６にする。これにより、レクテナ装置１では、以下に説明するように、整流回路１２Ａのダイオードを保護しつつ、負荷装置９に対して協調して直流電力を供給することができる。 The correction command value generation circuit 28 uses equation EQ3 to generate a correction command value ΔVc based on the circuit temperature T_rect of the rectifier circuit 12A. The addition circuit 39 generates the voltage command value Vref1 of the target voltage using equation EQ4. Thereby, as shown in FIG. 11, the output voltage Vo_dcdc of the DC/DC converter 15A becomes lower as the circuit temperature T_rect of the rectifier circuit 12A becomes higher. Specifically, when the circuit temperature T_rect of the rectifier circuit 12A is the temperature T1, the DC/DC converter 15A sets the output voltage Vo_dcdc of the DC/DC converter 15A to the voltage Vo5, and the circuit temperature To_rect of the rectifier circuit 12A is the temperature T1. When the temperature T2 is higher, the output voltage Vo_dcdc of the DC/DC converter 15A is set to a voltage Vo6 lower than the voltage Vo5. Thereby, the rectenna device 1 can cooperatively supply DC power to the load device 9 while protecting the diode of the rectifier circuit 12A, as described below.
　図１２は、整流回路１２Ａの出力電流Ｉo_rectおよび回路温度Ｔ_rectの関係を示す特性を表すものである。例えば、整流回路１２Ａの出力電流Ｉo_rectが多いほど、ダイオードにおけるエネルギー損失が大きくなり、回路温度Ｔ_rectは高くなる。特に、この例では、出力電流Ｉo_rectが多い領域では、出力電流Io_rectの増加に応じて、回路温度Ｔ_rectが急激に高くなる。 FIG. 12 shows characteristics showing the relationship between the output current Io_rect of the rectifier circuit 12A and the circuit temperature T_rect. For example, the greater the output current Io_rect of the rectifier circuit 12A, the greater the energy loss in the diode and the higher the circuit temperature T_rect. In particular, in this example, in a region where the output current Io_rect is large, the circuit temperature T_rect increases rapidly as the output current Io_rect increases.
　例えば、整流回路１２Ａの回路温度Ｔ_rectが高い場合には、整流回路１２Ａの出力電流Ｉo_rectは多い。このように整流回路１２Ａの出力電流Ｉo_rectが多い場合には、整流回路１２Ａのダイオードでは、電流容量の観点から余裕が少ない。例えば、出力電流Ｉo_rectが過大である場合には、整流回路１２Ａにおけるダイオードの特性が劣化し、あるいはダイオードが故障する可能性がある。よって、ＤＣ／ＤＣコンバータ１５Ａは、整流回路１２Ａの回路温度Ｔ_rectが高いほど、出力電圧Ｖo_dcdcを低くする。ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcが低くなると、ＤＣ／ＤＣコンバータ１５Ａの出力電流が低下し、その低下分を補うように、ＤＣ／ＤＣコンバータ１５Ｂ，１５Ｃ，１５Ｄの出力電流が増加する。このようにＤＣ／ＤＣコンバータ１５Ａの出力電流が少なくなると、ＤＣ／ＤＣコンバータ１５Ａの入力電流が少なくなり、整流回路１２Ａの出力電流Ｉo_rectが少なくなる。このようにして、レクテナ装置１では、整流回路１２Ａの出力電流Ｉo_rectを低く抑えることができ、整流回路１２Ａのダイオードを保護することができる。そして、レクテナ装置１では、４つのＤＣ／ＤＣコンバータ１５Ａ～１５Ｄが、負荷装置９に対して協調して直流電力を供給することができる。 For example, when the circuit temperature T_rect of the rectifier circuit 12A is high, the output current Io_rect of the rectifier circuit 12A is large. When the output current Io_rect of the rectifier circuit 12A is large as described above, the diodes of the rectifier circuit 12A have little margin in terms of current capacity. For example, if the output current Io_rect is excessive, the characteristics of the diode in the rectifier circuit 12A may deteriorate or the diode may fail. Therefore, the DC/DC converter 15A lowers the output voltage Vo_dcdc as the circuit temperature T_rect of the rectifier circuit 12A increases. When the output voltage Vo_dcdc of the DC/DC converter 15A decreases, the output current of the DC/DC converter 15A decreases, and the output currents of the DC/ DC converters 15B, 15C, and 15D increase to compensate for the decrease. When the output current of the DC/DC converter 15A decreases in this way, the input current of the DC/DC converter 15A decreases, and the output current Io_rect of the rectifier circuit 12A decreases. In this way, in the rectenna device 1, the output current Io_rect of the rectifier circuit 12A can be suppressed low, and the diode of the rectifier circuit 12A can be protected. In the rectenna device 1, the four DC/DC converters 15A to 15D can cooperatively supply DC power to the load device 9.
　一方、例えば、整流回路１２Ａの回路温度Ｔ_rectが低い場合には、整流回路１２Ａの出力電流Ｉo_rectは少ない。このように整流回路１２Ａの出力電流Ｉo_rectが少ない場合には、整流回路１２Ａのダイオードでは、電流容量の観点から余裕があり、より多くの電流を流すことができる。よって、ＤＣ／ＤＣコンバータ１５Ａは、整流回路１２Ａの出力電流Ｉo_rectが少ないほど、出力電圧Ｖo_dcdcを高くする。ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcが高くなると、ＤＣ／ＤＣコンバータ１５Ａの出力電流が多くなり、その増加分だけ、ＤＣ／ＤＣコンバータ１５Ｂ，１５Ｃ，１５Ｄの出力電流が低下する。このようにＤＣ／ＤＣコンバータ１５Ａの出力電流が多くなると、ＤＣ／ＤＣコンバータ１５Ａの入力電流が多くなり、整流回路１２Ａの出力電流Ｉo_rectが多くなる。このようにして、レクテナ装置１では、４つのＤＣ／ＤＣコンバータ１５Ａ～１５Ｄが、負荷装置９に対して協調して直流電力を供給することができる。 On the other hand, for example, when the circuit temperature T_rect of the rectifier circuit 12A is low, the output current Io_rect of the rectifier circuit 12A is small. In this way, when the output current Io_rect of the rectifier circuit 12A is small, the diodes of the rectifier circuit 12A have a margin in terms of current capacity and can allow more current to flow. Therefore, the DC/DC converter 15A increases the output voltage Vo_dcdc as the output current Io_rect of the rectifier circuit 12A decreases. When the output voltage Vo_dcdc of the DC/DC converter 15A increases, the output current of the DC/DC converter 15A increases, and the output currents of the DC/ DC converters 15B, 15C, and 15D decrease by the increased amount. When the output current of the DC/DC converter 15A increases in this way, the input current of the DC/DC converter 15A increases, and the output current Io_rect of the rectifier circuit 12A increases. In this way, in the rectenna device 1, the four DC/DC converters 15A to 15D can cooperate to supply DC power to the load device 9.
　なお、以上では、整流回路１２Ａ、センサ回路１３Ａ、補正制御回路１４Ａ、およびＤＣ／ＤＣコンバータ１５Ａを例に挙げて説明したが、整流回路１２Ｂ、センサ回路１３Ｂ、補正制御回路１４Ｂ、およびＤＣ／ＤＣコンバータ１５Ｂについても同様であり、整流回路１２Ｃ、センサ回路１３Ｃ、補正制御回路１４Ｃ、およびＤＣ／ＤＣコンバータ１５Ｃについても同様であり、整流回路１２Ｄ、センサ回路１３Ｄ、補正制御回路１４Ｄ、およびＤＣ／ＤＣコンバータ１５Ｄについても同様である。 In addition, although the rectifier circuit 12A, the sensor circuit 13A, the correction control circuit 14A, and the DC/DC converter 15A have been explained above as examples, the rectifier circuit 12B, the sensor circuit 13B, the correction control circuit 14B, and the DC/DC converter The same applies to converter 15B, the same applies to rectifier circuit 12C, sensor circuit 13C, correction control circuit 14C, and DC/DC converter 15C, and the same applies to rectifier circuit 12D, sensor circuit 13D, correction control circuit 14D, and DC/DC converter 15C. The same applies to converter 15D.
　このように、レクテナ装置１では、マイクロ波を受信可能なアンテナ部１０と、それぞれが、アンテナ部１０に接続され、アンテナ部１０から供給された電力信号を整流可能な４つの整流回路１２と、４つの整流回路１２にそれぞれ対応して設けられ、それぞれが、対応する整流回路１２の出力電力に基づいて直流電力を生成可能な４つのＤＣ／ＤＣコンバータ１５と、４つのＤＣ／ＤＣコンバータ１５の出力端子に接続された電力出力端子Ｔと、４つの整流回路１２にそれぞれ対応して設けられるとともに、４つのＤＣ／ＤＣコンバータ１５にそれぞれ対応して設けられ、それぞれが、対応する整流回路１２の、出力電圧、出力電流、および回路温度のうちの１以上に基づいて、対応するＤＣ／ＤＣコンバータ１５の出力電圧を補正可能な４つの補正制御回路１４とを備えるようにした。これにより、レクテナ装置１では、整流回路１２の出力電流Ｉo_rectを低く抑えることができ、整流回路１２のダイオードを保護することができる。 In this way, the rectenna device 1 includes the antenna section 10 capable of receiving microwaves, the four rectifier circuits 12 each connected to the antenna section 10 and capable of rectifying the power signal supplied from the antenna section 10, Four DC/DC converters 15 are provided corresponding to the four rectifier circuits 12, and each of the four DC/DC converters 15 is capable of generating DC power based on the output power of the corresponding rectifier circuit 12. The power output terminal T connected to the output terminal is provided corresponding to each of the four rectifier circuits 12, and is provided corresponding to each of the four DC/DC converters 15. , four correction control circuits 14 capable of correcting the output voltage of the corresponding DC/DC converter 15 based on one or more of output voltage, output current, and circuit temperature. Thereby, in the rectenna device 1, the output current Io_rect of the rectifier circuit 12 can be suppressed low, and the diode of the rectifier circuit 12 can be protected.
　また、レクテナ装置１では、４つの補正制御回路１４のそれぞれは、対応する整流回路１２の出力電圧Ｖo_rectが第１の電圧（例えば電圧Ｖ１）である場合に、対応するＤＣ／ＤＣコンバータ１５の出力電圧Ｖo_dcdcを第１の出力電圧（例えば電圧Ｖｏ１）にし、対応する整流回路１２の出力電圧Ｖo_rectが第１の電圧よりも高い第２の電圧（例えば電圧Ｖ２）である場合に、対応するＤＣ／ＤＣコンバータ１５の出力電圧Ｖo_dcdcを第１の出力電圧より高い第２の出力電圧（例えば電圧Ｖｏ２）にするように、対応するＤＣ／ＤＣコンバータ１５の出力電圧Ｖo_dcdcを補正することができるようにした。これにより、レクテナ装置１では、例えば、対応する整流回路１２の出力電圧Ｖo_rectが低い場合に、その整流回路１２の出力電流Ｉo_rectを低く抑えることができるので、整流回路１２のダイオードを保護することができる。 Further, in the rectenna device 1, each of the four correction control circuits 14 outputs the output of the corresponding DC/DC converter 15 when the output voltage Vo_rect of the corresponding rectifier circuit 12 is the first voltage (for example, voltage V1). When the voltage Vo_dcdc is set to the first output voltage (for example, voltage Vo1) and the output voltage Vo_rect of the corresponding rectifier circuit 12 is a second voltage (for example, voltage V2) higher than the first voltage, the corresponding DC/ The output voltage Vo_dcdc of the corresponding DC/DC converter 15 can be corrected so that the output voltage Vo_dcdc of the DC converter 15 becomes a second output voltage (for example, voltage Vo2) higher than the first output voltage. . Thereby, in the rectenna device 1, for example, when the output voltage Vo_rect of the corresponding rectifier circuit 12 is low, the output current Io_rect of the rectifier circuit 12 can be suppressed low, so that the diode of the rectifier circuit 12 can be protected. can.
　また、レクテナ装置１では、４つの補正制御回路１４のそれぞれは、対応する整流回路１２の出力電流Ｉo_rectが第１の電流（例えば電流Ｉ１）である場合に、対応するＤＣ／ＤＣコンバータ１５の出力電圧Ｖo_dcdcを第３の出力電圧（例えば電圧Ｖｏ３）にし、対応する整流回路１２の出力電流Ｉo_rectが第１の電流よりも多い第２の電流（例えば電流Ｉ２）である場合に、対応するＤＣ／ＤＣコンバータ１５の出力電圧Ｖo_dcdcを第３の出力電圧より低い第４の出力電圧（電圧Ｖｏ４）にするように、対応するＤＣ／ＤＣコンバータ１５の出力電圧Ｖo_dcdcを補正することができるようにした。これにより、レクテナ装置１では、例えば、対応する整流回路１２の出力電流Ｉo_rectが多い場合に、その整流回路１２の出力電流Ｉo_rectを低く抑えることができるので、整流回路１２のダイオードを保護することができる。 Furthermore, in the rectenna device 1, each of the four correction control circuits 14 outputs the output of the corresponding DC/DC converter 15 when the output current Io_rect of the corresponding rectifier circuit 12 is the first current (for example, current I1). When the voltage Vo_dcdc is set to the third output voltage (for example, the voltage Vo3) and the output current Io_rect of the corresponding rectifier circuit 12 is a second current (for example, the current I2) that is larger than the first current, the corresponding DC/ The output voltage Vo_dcdc of the corresponding DC/DC converter 15 can be corrected so that the output voltage Vo_dcdc of the DC converter 15 becomes the fourth output voltage (voltage Vo4) lower than the third output voltage. As a result, in the rectenna device 1, for example, when the output current Io_rect of the corresponding rectifier circuit 12 is large, the output current Io_rect of the corresponding rectifier circuit 12 can be suppressed to a low level, so that the diode of the rectifier circuit 12 can be protected. can.
　また、レクテナ装置１では、４つの補正制御回路１４のそれぞれは、対応する整流回路１２の回路温度Ｔ_rectが第１の温度（例えば温度Ｔ１）である場合に、対応するＤＣ／ＤＣコンバータ１５の出力電圧Ｖo_dcdcを第５の出力電圧（例えば電圧Ｖｏ５）にし、対応する整流回路１２の回路温度Ｔ_rectが第１の温度よりも高い第２の温度（例えば温度Ｔ２）である場合に、対応するＤＣ／ＤＣコンバータ１５の出力電圧Ｖo_dcdcを第５の出力電圧より低い第６の出力電圧（例えば電圧Ｖｏ６）にするように、対応するＤＣ／ＤＣコンバータ１５の出力電圧Ｖo_dcdcを補正することができるようにした。これにより、レクテナ装置１では、例えば、対応する整流回路１２の回路温度Ｔ_rectが高い場合に、その整流回路１２の出力電流Ｉo_rectを低く抑えることができるので、整流回路１２のダイオードを保護することができる。 In the rectenna device 1, each of the four correction control circuits 14 outputs the output of the corresponding DC/DC converter 15 when the circuit temperature T_rect of the corresponding rectifier circuit 12 is the first temperature (for example, temperature T1). When the voltage Vo_dcdc is set to the fifth output voltage (for example, voltage Vo5) and the circuit temperature T_rect of the corresponding rectifier circuit 12 is a second temperature (for example, temperature T2) higher than the first temperature, the corresponding DC/ The output voltage Vo_dcdc of the corresponding DC/DC converter 15 can be corrected so that the output voltage Vo_dcdc of the DC converter 15 becomes a sixth output voltage (for example, voltage Vo6) lower than the fifth output voltage. . As a result, in the rectenna device 1, for example, when the circuit temperature T_rect of the corresponding rectifier circuit 12 is high, the output current Io_rect of the rectifier circuit 12 can be suppressed to a low level, so that the diode of the rectifier circuit 12 can be protected. can.
［効果］
　以上のように本実施の形態では、マイクロ波を受信可能なアンテナ部と、それぞれが、アンテナ部に接続され、アンテナ部から供給された電力信号を整流可能な４つの整流回路と、４つの整流回路にそれぞれ対応して設けられ、それぞれが、対応する整流回路の出力電力に基づいて直流電力を生成可能な４つのＤＣ／ＤＣコンバータと、４つのＤＣ／ＤＣコンバータの出力端子に接続された電力出力端子と、４つの整流回路にそれぞれ対応して設けられるとともに、４つのＤＣ／ＤＣコンバータにそれぞれ対応して設けられ、それぞれが、対応する整流回路の、出力電圧、出力電流、および回路温度のうちの１以上に基づいて、対応するＤＣ／ＤＣコンバータの出力電圧を補正可能な４つの補正制御回路とを備えるようにしたので、整流回路のダイオードを保護することができる。 [effect]
As described above, this embodiment includes an antenna unit capable of receiving microwaves, four rectifier circuits each connected to the antenna unit and capable of rectifying the power signal supplied from the antenna unit, and four rectifier circuits each connected to the antenna unit and capable of rectifying the power signal supplied from the antenna unit. Four DC/DC converters, each of which is provided corresponding to the circuit, and each capable of generating DC power based on the output power of the corresponding rectifier circuit, and power connected to the output terminals of the four DC/DC converters. The output terminal is provided corresponding to each of the four rectifier circuits, and is provided corresponding to each of the four DC/DC converters. Since four correction control circuits capable of correcting the output voltage of the corresponding DC/DC converter based on one or more of them are provided, the diodes of the rectifier circuit can be protected.
　本実施の形態では、４つの補正制御回路のそれぞれは、対応する整流回路の出力電圧が第１の電圧である場合に、対応するＤＣ／ＤＣコンバータの出力電圧を第１の出力電圧にし、対応する整流回路の出力電圧が第１の電圧よりも高い第２の電圧である場合に、対応するＤＣ／ＤＣコンバータの出力電圧を第１の出力電圧より高い第２の出力電圧にするように、対応するＤＣ／ＤＣコンバータの出力電圧を補正することができるようにしたので、整流回路のダイオードを保護することができる。 In this embodiment, each of the four correction control circuits sets the output voltage of the corresponding DC/DC converter to the first output voltage when the output voltage of the corresponding rectifier circuit is the first voltage. When the output voltage of the rectifier circuit is a second voltage higher than the first voltage, the output voltage of the corresponding DC/DC converter is set to a second output voltage higher than the first output voltage, Since the output voltage of the corresponding DC/DC converter can be corrected, the diode of the rectifier circuit can be protected.
　本実施の形態では、４つの補正制御回路のそれぞれは、対応する整流回路の出力電流が第１の電流である場合に、対応するＤＣ／ＤＣコンバータの出力電圧を第３の出力電圧にし、対応する整流回路の出力電流が第１の電流よりも多い第２の電流である場合に、対応するＤＣ／ＤＣコンバータの出力電圧を第３の出力電圧より低い第４の出力電圧にするように、対応するＤＣ／ＤＣコンバータの出力電圧を補正することができるようにしたので、整流回路のダイオードを保護することができる。 In this embodiment, each of the four correction control circuits sets the output voltage of the corresponding DC/DC converter to the third output voltage when the output current of the corresponding rectifier circuit is the first current, and When the output current of the rectifier circuit is a second current larger than the first current, the output voltage of the corresponding DC/DC converter is set to a fourth output voltage lower than the third output voltage, Since the output voltage of the corresponding DC/DC converter can be corrected, the diode of the rectifier circuit can be protected.
　本実施の形態では、４つの補正制御回路のそれぞれは、対応する整流回路の回路温度が第１の温度である場合に、対応するＤＣ／ＤＣコンバータの出力電圧を第５の出力電圧にし、対応する整流回路の回路温度が第１の温度よりも高い第２の温度である場合に、対応するＤＣ／ＤＣコンバータの出力電圧を第５の出力電圧より低い第６の出力電圧にするように、対応するＤＣ／ＤＣコンバータの出力電圧を補正することができるようにしたので、整流回路のダイオードを保護することができる。 In this embodiment, each of the four correction control circuits sets the output voltage of the corresponding DC/DC converter to the fifth output voltage when the circuit temperature of the corresponding rectifier circuit is the first temperature. When the circuit temperature of the rectifier circuit is a second temperature higher than the first temperature, the output voltage of the corresponding DC/DC converter is set to a sixth output voltage lower than the fifth output voltage, Since the output voltage of the corresponding DC/DC converter can be corrected, the diode of the rectifier circuit can be protected.
［変形例１］
　上記実施の形態では、図１に示したように、４つのアンテナ１１Ａ～１１Ｄを設けたが、これに限定されるものではなく、これに代えて、例えば３つ以下のアンテナ１１を設けてもよいし、５つ以上のアンテナ１１を設けてもよい。例えば、図１３に示すレクテナ装置１Ａのように、１つのアンテナ１１を設けてもよい。この場合、アンテナ１１から出力された電力は、４つの整流回路１２Ａ～１２Ｄに分配される。 [Modification 1]
In the above embodiment, four antennas 11A to 11D are provided as shown in FIG. Alternatively, five or more antennas 11 may be provided. For example, one antenna 11 may be provided like a rectenna device 1A shown in FIG. 13. In this case, the power output from antenna 11 is distributed to four rectifier circuits 12A to 12D.
［変形例２］
　上記実施の形態では、図１に示したように、４つのアンテナ１１Ａ～１１Ｄの４つの出力端子、および４つの整流回路１２Ａ～１２Ｄの４つの入力端子を互いに接続したが、これに限定されるものではない。これに代えて、例えば、図１４に示すレクテナ装置１Ｂのように、４つのアンテナ１１Ａ～１１Ｄと、４つの整流回路１２Ａ～１２Ｄとを、それぞれ１対１で接続してもよい。このレクテナ装置１Ｂでは、アンテナ１１Ａの出力端子は整流回路１２Ａの入力端子に接続され、アンテナ１１Ｂの出力端子は整流回路１２Ｂの入力端子に接続され、アンテナ１１Ｃの出力端子は整流回路１２Ｃの入力端子に接続され、アンテナ１１Ｄの出力端子は整流回路１２Ｄの入力端子に接続される。 [Modification 2]
In the above embodiment, as shown in FIG. 1, the four output terminals of the four antennas 11A to 11D and the four input terminals of the four rectifier circuits 12A to 12D are connected to each other, but the present invention is not limited to this. It's not a thing. Instead, for example, four antennas 11A to 11D and four rectifier circuits 12A to 12D may be connected one-to-one, as in a rectenna device 1B shown in FIG. 14, for example. In this rectenna device 1B, the output terminal of the antenna 11A is connected to the input terminal of the rectifier circuit 12A, the output terminal of the antenna 11B is connected to the input terminal of the rectifier circuit 12B, and the output terminal of the antenna 11C is connected to the input terminal of the rectifier circuit 12C. The output terminal of the antenna 11D is connected to the input terminal of the rectifier circuit 12D.
　図１５，１６は、レクテナ装置１Ｂにおける、４つのアンテナ１１、４つの整流回路１２、４つのセンサ回路１３、４つの補正制御回路１４、および４つのＤＣ／ＤＣコンバータ１５の実装例を表すものである。４つのアンテナ１１、４つの整流回路１２、４つのセンサ回路１３、４つの補正制御回路１４、および４つのＤＣ／ＤＣコンバータ１５は、この例ではプリント基板である基板１１０に実装される。図１０は、基板１１０の基板面１１０Ａを示し、図１１は、基板１１０の、基板面１１０Ａとは反対の基板面１１０Ｂを示す。この例では、４つのアンテナ１１は基板面１１０Ａに実装され、４つの整流回路１２、４つのセンサ回路１３、４つの補正制御回路１４、および４つのＤＣ／ＤＣコンバータ１５は基板面１１０Ｂに実装される。 15 and 16 represent implementation examples of four antennas 11, four rectifier circuits 12, four sensor circuits 13, four correction control circuits 14, and four DC/DC converters 15 in the rectenna device 1B. be. Four antennas 11, four rectifier circuits 12, four sensor circuits 13, four correction control circuits 14, and four DC/DC converters 15 are mounted on a substrate 110, which is a printed circuit board in this example. 10 shows a substrate side 110A of the substrate 110, and FIG. 11 shows a substrate side 110B of the substrate 110 opposite the substrate side 110A. In this example, four antennas 11 are mounted on the substrate surface 110A, and four rectifier circuits 12, four sensor circuits 13, four correction control circuits 14, and four DC/DC converters 15 are mounted on the substrate surface 110B. Ru.
　図１５に示したように、基板面１００Ａにおいて、４つのアンテナ１１は、この例では２行２列で配置される。４つのアンテナ１１は、４つの給電点１１１にそれぞれ導かれる。 As shown in FIG. 15, on the substrate surface 100A, the four antennas 11 are arranged in two rows and two columns in this example. The four antennas 11 are guided to four feeding points 111, respectively.
　図１６に示したように、基板面１００Ｂにおいて、整流回路１２、センサ回路１３、補正制御回路１４、およびＤＣ／ＤＣコンバータ１５を含む４つの回路群は、この例では２行２列で配置される。４つの整流回路１２は、４つの給電点１１１にそれぞれ導かれる。 As shown in FIG. 16, on the substrate surface 100B, four circuit groups including the rectifier circuit 12, the sensor circuit 13, the correction control circuit 14, and the DC/DC converter 15 are arranged in two rows and two columns in this example. Ru. The four rectifier circuits 12 are respectively guided to four feed points 111.
　この場合でも、例えば４つの整流回路１２Ａから１２Ｄの特性ばらつきにより、４つの整流回路１２Ａ～１２Ｄのいずれか１つに多くの電流が流れることがあり得る。例えば、整流回路１２Ａ～１２Ｄのいずれか１つに過大な電流が流れた場合には、その整流回路１２におけるダイオードの特性が劣化し、あるいはダイオードが故障する可能性がある。 Even in this case, for example, a large amount of current may flow through any one of the four rectifier circuits 12A to 12D due to variations in the characteristics of the four rectifier circuits 12A to 12D. For example, if an excessive current flows through any one of the rectifier circuits 12A to 12D, the characteristics of the diode in the rectifier circuit 12 may deteriorate or the diode may fail.
　レクテナ装置１Ｂでは、上記実施の形態の場合と同様に、例えば、補正制御回路１４Ａは、センサ回路１３Ａから供給された整流回路１２Ａの出力電圧Ｖo_rectおよび出力電流Ｉo_rectの検出結果、および整流回路１２Ａから供給された回路温度Ｔ_rectの検出結果に基づいて、ＤＣ／ＤＣコンバータ１５Ａの出力電圧Ｖo_dcdcの補正量を示す補正指令値を生成する。ＤＣ／ＤＣコンバータ１５Ａは、補正制御回路１４Ａから供給された補正指令値に基づいて、出力電圧を補正する。これにより、整流回路１２Ａのダイオードには、過大な電流が流れないので、ダイオードの特性が劣化し、あるいはダイオードが故障する可能性を低減することができる。そして、４つのＤＣ／ＤＣコンバータ１５Ａ～１５Ｄは、負荷装置９に対して協調して直流電力を供給することができる。 In the rectenna device 1B, as in the above embodiment, for example, the correction control circuit 14A detects the output voltage Vo_rect and output current Io_rect of the rectifier circuit 12A supplied from the sensor circuit 13A, and the detection results from the rectifier circuit 12A. Based on the detection result of the supplied circuit temperature T_rect, a correction command value indicating the amount of correction of the output voltage Vo_dcdc of the DC/DC converter 15A is generated. The DC/DC converter 15A corrects the output voltage based on the correction command value supplied from the correction control circuit 14A. This prevents excessive current from flowing through the diodes of the rectifier circuit 12A, thereby reducing the possibility that the characteristics of the diodes will deteriorate or that the diodes will fail. The four DC/DC converters 15A to 15D can cooperatively supply DC power to the load device 9.
［変形例３］
　上記実施の形態では、図８に示したように、ＤＣ／ＤＣコンバータ１５の出力電圧Ｖo_dcdcは、整流回路１２の出力電圧Ｖo_rectの変化に応じて線形に変化するようにしたが、これに限定されるものではなく、これに代えて、例えば、出力電圧Ｖo_dcdcは、出力電圧Ｖo_rectの変化に応じて非線形的に変化してもよい。 [Modification 3]
In the above embodiment, as shown in FIG. 8, the output voltage Vo_dcdc of the DC/DC converter 15 is changed linearly according to the change in the output voltage Vo_rect of the rectifier circuit 12, but the present invention is not limited to this. Instead of this, for example, the output voltage Vo_dcdc may change nonlinearly in response to changes in the output voltage Vo_rect.
　同様に、上記実施の形態では、図１０に示したように、ＤＣ／ＤＣコンバータ１５の出力電圧Ｖo_dcdcは、整流回路１２の出力電流Ｉo_rectの変化に応じて線形に変化するようにしたが、これに限定されるものではなく、これに代えて、例えば、出力電圧Ｖo_dcdcは、出力電流Ｉo_rectの変化に応じて非線形的に変化してもよい。 Similarly, in the above embodiment, as shown in FIG. 10, the output voltage Vo_dcdc of the DC/DC converter 15 is changed linearly according to the change in the output current Io_rect of the rectifier circuit 12. The output voltage Vo_dcdc is not limited to this, and instead, for example, the output voltage Vo_dcdc may change nonlinearly in accordance with the change in the output current Io_rect.
　同様に、上記実施の形態では、図１１に示したように、ＤＣ／ＤＣコンバータ１５の出力電圧Ｖo_dcdcは、整流回路１２の回路温度Ｔ_rectの変化に応じて線形に変化するようにしたが、これに限定されるものではなく、これに代えて、例えば、出力電圧Ｖo_dcdcは、回路温度Ｔ_rectの変化に応じて非線形的に変化してもよい。 Similarly, in the above embodiment, as shown in FIG. 11, the output voltage Vo_dcdc of the DC/DC converter 15 is changed linearly according to the change in the circuit temperature T_rect of the rectifier circuit 12. The output voltage Vo_dcdc is not limited to this, and instead, for example, the output voltage Vo_dcdc may change nonlinearly in accordance with a change in the circuit temperature T_rect.
　以上、実施の形態および変形例を挙げて本発明を説明したが、本発明はこれらの実施の形態等には限定されず、種々の変形が可能である。 Although the present invention has been described above with reference to embodiments and modifications, the present invention is not limited to these embodiments, etc., and various modifications are possible.
　例えば、上記実施の形態では、それぞれが、整流回路１２、センサ回路１３、補正制御回路１４、およびＤＣ／ＤＣコンバータ１５を含む４つの回路群を設けたが、これに限定されたものではない。これに代えて、３つ以下の回路群を設けてもよいし、５つ以上の回路群を設けてもよい。 For example, in the above embodiment, four circuit groups each including the rectifier circuit 12, the sensor circuit 13, the correction control circuit 14, and the DC/DC converter 15 are provided, but the present invention is not limited to this. Instead, three or less circuit groups may be provided, or five or more circuit groups may be provided.

Claims (15)

  1. 　マイクロ波を受信可能なアンテナ部と、
    　それぞれが、前記アンテナ部に接続され、前記アンテナ部から供給された電力信号を整流可能な複数の整流回路と、
    　前記複数の整流回路にそれぞれ対応して設けられ、それぞれが、対応する整流回路の出力電力に基づいて直流電力を生成可能な複数の電力変換回路と、
    　前記複数の電力変換回路の出力端子に接続された電力出力端子と、
    　前記複数の整流回路にそれぞれ対応して設けられるとともに、前記複数の電力変換回路にそれぞれ対応して設けられ、それぞれが、対応する整流回路の、出力電圧、出力電流、および回路温度のうちの１以上に基づいて、対応する電力変換回路の出力電圧を補正可能な複数の補正制御回路と
    　を備えたレクテナ装置。     An antenna section capable of receiving microwaves,
    a plurality of rectifier circuits each connected to the antenna section and capable of rectifying the power signal supplied from the antenna section;
    a plurality of power conversion circuits provided corresponding to the plurality of rectifier circuits, each of which is capable of generating DC power based on the output power of the corresponding rectifier circuit;
    a power output terminal connected to the output terminals of the plurality of power conversion circuits;
    It is provided correspondingly to each of the plurality of rectifier circuits, and is provided correspondingly to each of the plurality of power conversion circuits, and each one of the output voltage, output current, and circuit temperature of the corresponding rectifier circuit. Based on the above, a rectenna device comprising: a plurality of correction control circuits capable of correcting the output voltage of a corresponding power conversion circuit.
  2. 　前記複数の補正制御回路のそれぞれは、対応する前記整流回路の出力電圧に基づいて、対応する前記電力変換回路の出力電圧を補正可能である
    　請求項１に記載のレクテナ装置。     The rectenna device according to claim 1, wherein each of the plurality of correction control circuits is capable of correcting the output voltage of the corresponding power conversion circuit based on the output voltage of the corresponding rectifier circuit.
  3. 　前記複数の補正制御回路のそれぞれは、対応する整流回路の出力電圧に基づいて、対応する前記電力変換回路の出力電圧の補正値を示す第１の補正指令値を生成可能であり、
    　前記複数の電力変換回路のそれぞれは、対応する補正制御回路から供給された前記第１の補正指令値に基づいて、その電力変換回路の出力電圧を補正可能である
    　請求項２に記載のレクテナ装置。     Each of the plurality of correction control circuits can generate a first correction command value indicating a correction value of the output voltage of the corresponding power conversion circuit based on the output voltage of the corresponding rectifier circuit,
    The rectenna device according to claim 2, wherein each of the plurality of power conversion circuits is capable of correcting the output voltage of the power conversion circuit based on the first correction command value supplied from the corresponding correction control circuit. .
  4. 　前記複数の補正制御回路のそれぞれは、対応する整流回路の出力電圧が第１の電圧である場合に、対応する電力変換回路の出力電圧を第１の出力電圧にし、対応する整流回路の出力電圧が前記第１の電圧よりも高い第２の電圧である場合に、対応する電力変換回路の出力電圧を前記第１の出力電圧より高い第２の出力電圧にするように、対応する電力変換回路の出力電圧を補正可能である
    　請求項２または請求項３に記載のレクテナ装置。     Each of the plurality of correction control circuits sets the output voltage of the corresponding power conversion circuit to the first output voltage when the output voltage of the corresponding rectifier circuit is the first voltage, and adjusts the output voltage of the corresponding rectifier circuit to the first output voltage. is a second voltage higher than the first voltage, the corresponding power conversion circuit sets the output voltage of the corresponding power conversion circuit to a second output voltage higher than the first output voltage. The rectenna device according to claim 2 or 3, wherein the rectenna device is capable of correcting the output voltage of the rectenna device.
  5. 　前記複数の補正制御回路のそれぞれは、対応する前記整流回路の出力電流に基づいて、対応する前記電力変換回路の出力電圧を補正可能である
    　請求項１に記載のレクテナ装置。     The rectenna device according to claim 1, wherein each of the plurality of correction control circuits is capable of correcting the output voltage of the corresponding power conversion circuit based on the output current of the corresponding rectifier circuit.
  6. 　前記複数の補正制御回路のそれぞれは、対応する整流回路の出力電流に基づいて、対応する前記電力変換回路の出力電圧の補正値を示す第２の補正指令値を生成可能であり、
    　前記複数の電力変換回路のそれぞれは、対応する補正制御回路から供給された前記第２の補正指令値に基づいて、その電力変換回路の出力電圧を補正可能である
    　請求項５に記載のレクテナ装置。     Each of the plurality of correction control circuits can generate a second correction command value indicating a correction value of the output voltage of the corresponding power conversion circuit based on the output current of the corresponding rectifier circuit,
    The rectenna device according to claim 5, wherein each of the plurality of power conversion circuits is capable of correcting the output voltage of the power conversion circuit based on the second correction command value supplied from the corresponding correction control circuit. .
  7. 　前記複数の補正制御回路のそれぞれは、対応する整流回路の出力電流が第１の電流である場合に、対応する電力変換回路の出力電圧を第３の出力電圧にし、対応する整流回路の出力電流が前記第１の電流よりも多い第２の電流である場合に、対応する電力変換回路の出力電圧を前記第３の出力電圧より低い第４の出力電圧にするように、対応する電力変換回路の出力電圧を補正可能である
    　請求項５または請求項６に記載のレクテナ装置。     Each of the plurality of correction control circuits sets the output voltage of the corresponding power conversion circuit to a third output voltage when the output current of the corresponding rectifier circuit is the first current, and adjusts the output current of the corresponding rectifier circuit to a third output voltage. is a second current larger than the first current, the corresponding power converter circuit sets the output voltage of the corresponding power converter circuit to a fourth output voltage lower than the third output voltage. The rectenna device according to claim 5 or 6, wherein the rectenna device is capable of correcting the output voltage of the rectenna device.
  8. 　前記複数の補正制御回路のそれぞれは、対応する前記整流回路の回路温度に基づいて、対応する前記電力変換回路の出力電圧を補正可能である
    　請求項１に記載のレクテナ装置。     The rectenna device according to claim 1, wherein each of the plurality of correction control circuits is capable of correcting the output voltage of the corresponding power conversion circuit based on the circuit temperature of the corresponding rectifier circuit.
  9. 　前記複数の補正制御回路のそれぞれは、対応する整流回路の回路温度に基づいて、対応する前記電力変換回路の出力電圧の補正値を示す第３の補正指令値を生成可能であり、
    　前記複数の電力変換回路のそれぞれは、対応する補正制御回路から供給された前記第３の補正指令値に基づいて、その電力変換回路の出力電圧を補正可能である
    　請求項８に記載のレクテナ装置。     Each of the plurality of correction control circuits can generate a third correction command value indicating a correction value of the output voltage of the corresponding power conversion circuit based on the circuit temperature of the corresponding rectifier circuit,
    The rectenna device according to claim 8, wherein each of the plurality of power conversion circuits is capable of correcting the output voltage of the power conversion circuit based on the third correction command value supplied from the corresponding correction control circuit. .
  10. 　前記複数の補正制御回路のそれぞれは、対応する整流回路の回路温度が第１の温度である場合に、対応する電力変換回路の出力電圧を第５の出力電圧にし、対応する整流回路の回路温度が前記第１の温度よりも高い第２の温度である場合に、対応する電力変換回路の出力電圧を前記第５の出力電圧より低い第６の出力電圧にするように、対応する電力変換回路の出力電圧を補正可能である
    　請求項８または請求項９に記載のレクテナ装置。     Each of the plurality of correction control circuits sets the output voltage of the corresponding power conversion circuit to a fifth output voltage when the circuit temperature of the corresponding rectifier circuit is the first temperature, and the circuit temperature of the corresponding rectifier circuit is set to a fifth output voltage. is a second temperature higher than the first temperature, the corresponding power conversion circuit sets the output voltage of the corresponding power conversion circuit to a sixth output voltage lower than the fifth output voltage. The rectenna device according to claim 8 or 9, wherein the rectenna device is capable of correcting the output voltage of the rectenna device.
  11. 　前記複数の電力変換回路の動作を制御する電力変換制御回路をさらに備え、
    　前記電力変換制御回路は、前記複数の電力変換回路が、互いに同じスイッチング周波数で、かつ互いに異なる位相でスイッチング動作を行うように、前記複数の電力変換回路の動作を制御可能である
    　請求項１に記載のレクテナ装置。     further comprising a power conversion control circuit that controls the operation of the plurality of power conversion circuits,
    The power conversion control circuit is capable of controlling the operation of the plurality of power conversion circuits so that the plurality of power conversion circuits perform switching operations at the same switching frequency and different phases from each other. The rectenna device described.
  12. 　前記アンテナ部、前記複数の整流回路、前記複数の制御回路、および前記複数の電力変換回路は、単一の基板に設けられた
    　請求項１に記載のレクテナ装置。     The rectenna device according to claim 1, wherein the antenna section, the plurality of rectifier circuits, the plurality of control circuits, and the plurality of power conversion circuits are provided on a single substrate.
  13. 　前記アンテナ部は、１または複数のアンテナを有し、
    　前記１または複数のアンテナの１または複数の出力端子および前記複数の整流回路の複数の入力端子は、互いに接続された
    　請求項１に記載のレクテナ装置。     The antenna section has one or more antennas,
    The rectenna device according to claim 1, wherein one or more output terminals of the one or more antennas and a plurality of input terminals of the plurality of rectifier circuits are connected to each other.
  14. 　前記アンテナ部、前記複数の整流回路、前記複数の制御回路、および前記複数の電力変換回路は、単一の基板に設けられ、
    　前記基板には、前記アンテナ部と前記複数の整流回路とを接続する伝送線路が設けられ、
    　前記伝送線路は、前記アンテナ部から、前記複数の整流回路のうちの２つの整流回路へ導かれる、互いに対称な形状を有する２つの線路部分を含む
    　請求項１３に記載のレクテナ装置。     The antenna section, the plurality of rectifier circuits, the plurality of control circuits, and the plurality of power conversion circuits are provided on a single substrate,
    The substrate is provided with a transmission line connecting the antenna section and the plurality of rectifier circuits,
    The rectenna device according to claim 13, wherein the transmission line includes two line portions that are symmetrical to each other and are guided from the antenna section to two of the plurality of rectifier circuits.
  15. 　前記アンテナ部は、前記複数の整流回路にそれぞれ対応して設けられた複数のアンテナを有し、
    　前記複数の整流回路のそれぞれは、前記複数のアンテナのうちの対応するアンテナから供給された電力信号を整流可能である
    　請求項１に記載のレクテナ装置。
     
     
     
     
          The antenna section has a plurality of antennas provided corresponding to the plurality of rectifier circuits, respectively,
    The rectenna device according to claim 1, wherein each of the plurality of rectifier circuits is capable of rectifying a power signal supplied from a corresponding one of the plurality of antennas.
PCT/JP2022/014430 2022-03-25 2022-03-25 Rectenna device WO2023181360A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140008992A1 (en) * 2012-07-06 2014-01-09 DvineWave Inc. Receivers for wireless power transmission
JP2014014232A (en) * 2012-07-04 2014-01-23 Daihen Corp Dc power supply device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014014232A (en) * 2012-07-04 2014-01-23 Daihen Corp Dc power supply device
US20140008992A1 (en) * 2012-07-06 2014-01-09 DvineWave Inc. Receivers for wireless power transmission

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