Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B3/00—Line transmission systems
  • H04B3/54—Systems for transmission via power distribution lines
  • H04B3/542—Systems for transmission via power distribution lines the information being in digital form
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
  • H01F38/18—Rotary transformers
• • 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
  • H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
  • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
• • 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
  • H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
  • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B15/00—Suppression or limitation of noise or interference
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
  • H04B5/40—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by components specially adapted for near-field transmission
  • H04B5/48—Transceivers
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L25/00—Baseband systems
  • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
  • H04L25/0264—Arrangements for coupling to transmission lines
  • H04L25/0272—Arrangements for coupling to multiple lines, e.g. for differential transmission
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L25/00—Baseband systems
  • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
  • H04L25/08—Modifications for reducing interference; Modifications for reducing effects due to line faults ; Receiver end arrangements for detecting or overcoming line faults
  • H04L25/085—Arrangements for reducing interference in line transmission systems, e.g. by differential transmission

Definitions

• the present disclosure relates to a transmission module and a wireless electronic data transmission device.
• Patent Document 1 discloses a device that wirelessly transmits energy and data between two objects that rotate relative to each other about a rotation axis.
• the device is equipped with two circular or arc-shaped coils for energy transfer and two circular or arc-shaped conductors for data transfer.
• the two coils face each other while being separated from each other in the axial direction of the rotating shaft, and perform energy transmission by inductive coupling.
• the two conductors are arranged coaxially with the two coils.
• the conductors face each other while being separated from each other in the axial direction, and perform data transmission by electrical coupling.
• a shielding arrangement made of a conductive material is arranged between the two coils and the two conductors.
• Patent Document 2 discloses a non-contact rotary interface that performs differential signal transmission between two pairs of balanced transmission lines that are provided in two cores that can move relative to each other. ing.
• Patent Document 1 Japanese Unexamined Patent Publication No. 20 1 6 _ 1 7 4 1 4 9
• Patent Document 2 Special Table 2 0 1 0—5 4 1 2 0 2 Publication
• the present disclosure provides a technique for improving communication quality in a system for wirelessly transmitting power and data between two objects.
• a transmission module is used as a power transmission module or a power reception module in a wireless power data transmission device that wirelessly transmits power and data between a power transmission module and a power reception module. It is a transmission module.
• the transmission module is located between the antenna for transmitting or receiving power by magnetic field coupling or electric field coupling, the differential transmission line pair for transmitting or receiving by electric field coupling, and between the antenna and the differential transmission line pair, A shield member for reducing electromagnetic interference between the antenna and the differential transmission line pair;
• a comprehensive or specific aspect of the present disclosure can be realized by an apparatus, a system, a method, an integrated circuit, a computer program, or a recording medium. Alternatively, it may be realized by any combination of an apparatus, a system, a method, an integrated circuit, a computer program, and a recording medium.
• Fig. 1 is a view schematically showing an example of a robot arm device having a plurality of movable parts.
• FIG. 2 is a diagram schematically showing the wiring configuration of a conventional robot arm device.
• FIG. 3 is a diagram showing a specific example of the conventional configuration shown in FIG.
• Fig. 4 is a diagram showing an example of a robot for wirelessly transmitting power in each joint.
• FIG. 5 is a diagram showing an example of a robot arm device to which wireless power transmission is applied.
• FIG. 6 is a cross-sectional view showing an example of a power transmission module and a power reception module in a wireless electronic data transmission device. ⁇ 02020/174819 3 (:17 2019/049147
• FIG. 7 is a top view of the power transmission module shown in FIG. 6 taken along axis 8.
• FIG. 8 is a perspective view showing a structural example of a magnetic core.
• FIG. 9 is a cross-sectional view showing a configuration of a wireless electronic data transmission device according to an exemplary embodiment.
• Fig. 10 is a top view of the power transmission module shown in Fig. 9 as viewed along the axis 8.
• Fig. 11 shows an example of connection at both ends of a differential transmission line pair.
• Fig. 11 shows another example of the connection at both ends of the differential transmission line pair.
• FIG. 11 (:] Fig. 11 ( 3) is a diagram showing still another example of connection at both ends of the differential transmission line pair.
• FIG. 110 is a diagram showing a circuit element for decoding.
• Fig. 11 Min is a diagram showing an example of a communication circuit that performs both transmission and reception.
• FIG. 12 is an enlarged view of a part of the wireless electronic data transmission device shown in FIG.
• FIG. 13 is a diagram showing an example of an electric field strength distribution.
• FIG. 14 is a diagram showing a modified example of the embodiment.
• FIG. 15 is a diagram showing another modification of the embodiment.
• Fig. 168 shows another example of the wireless electronic data transmission device.
• FIG. 16 is a diagram showing still another example of the wireless electronic data transmission device.
• FIG. 17-8 is a diagram showing still another modification.
• Fig. 179 is a top view of the power transmission module shown in Fig. 178, taken along axis 8.
• Fig. 188 shows an example of a configuration capable of full-duplex communication.
• Fig. 188 Top view of the power transmission module shown in Fig. 188 along axis 8. ⁇ 02020/174819 4 (: 17 2019/049147
• Fig. 198 shows another example of a configuration capable of full-duplex communication.
• Fig. 199 is a top view of the power transmission module shown in Fig. 189, taken along axis 8.
• FIG. 20 is a diagram showing still another example of the wireless electronic data transmission device.
• Fig. 21 is a block diagram showing the configuration of a system including a wireless electronic data transmission device.
• FIG. 22-8 is a diagram showing an example of an equivalent circuit of the power transmitting coil and the power receiving coil.
• FIG. 22 is a diagram showing another example of an equivalent circuit of the power transmitting coil and the power receiving coil.
• Fig. 2 3 8 shows a configuration example of a full-pledge type inverter circuit.
• Fig. 23 3 shows an example of the configuration of a half-bridge type inverter circuit.
• FIG. 24 is a block diagram showing a configuration of a wireless power transmission system including two wireless power feeding units.
• Fig. 25-8 is a diagram showing a wireless power transmission system including one wireless power supply unit.
• FIG. 25 is a diagram showing a wireless power transmission system including two wireless power feeding units.
• Figure 25(3 shows a wireless power transfer system with three or more wireless power feed units.
• FIG. 1 shows an example of a robot arm device having a plurality of movable parts (for example, joint parts). ⁇ 02020/174819 5 ⁇ (: 171?2019/049147
• Each movable part is configured to be rotatable or expandable/contractible by an actuator including an electric motor (hereinafter, simply referred to as "motor").
• motor an electric motor
• the power supply from a power source to multiple motors has been conventionally achieved by connecting via multiple cables.
• FIG. 2 is a diagram schematically showing a connection between components in such a conventional robot arm device.
• electric power is supplied from the power supply to multiple motors through a wired bus connection.
• Each motor is controlled by a control device (controller).
• FIG. 3 is a diagram showing a specific example of the conventional configuration shown in FIG.
• the robot in this example has two joints. Each joint is driven by servo motor 1 ⁇ /1. Each servo motor IV! is driven by 3-phase AC power.
• the controller is provided with as many motor drive circuits 900 as the number of motors IV! to be controlled.
• Each motor drive circuit 900 has a comparator, a three-phase inverter, and a control circuit.
• the converter converts the alternating current (80) power from the power supply into direct current (port ).
• the 3-phase inverter converts the DC power output from the converter into 3-phase AC power and supplies it to the motor IV!.
• the control circuit controls the three-phase inverter to supply the necessary power to the motor IV!.
• the motor drive circuit 900 obtains information about the rotational position and the rotational speed from the motor IV! and adjusts the voltage of each phase according to the information. With such a configuration, the operation of each joint is controlled.
• the present inventors have studied to reduce the number of cables in the movable part of the robot arm by applying the wireless power transmission technology.
• FIG. 4 is a diagram showing a configuration example of a robot that wirelessly transmits power in each joint.
• the three-phase inverter and control circuit for driving the motor IV! are provided inside the robot instead of an external controller.
• wireless power transmission is performed through magnetic field coupling between the power transmitting coil and the power receiving coil.
• This robot has a wireless power supply unit and a small motor for each joint.
• Each small motor 700,800 has a motor IV!, a three-phase inverter, and a control circuit.
• Each of the wireless power supply units 600 and 600 includes a power transmission circuit, a power transmission coil, a power reception coil, and a power reception circuit.
• the power transmission circuit includes an inverter circuit.
• the power receiving circuit includes a rectifier circuit.
• the power transmission circuit in the wireless power feeding unit 600 on the left side in FIG. 4 is connected between the power source and the power transmission coil, and converts the supplied DC power into AC power and supplies it to the power transmission coil.
• the power receiving circuit converts AC power received by the power receiving coil from the power transmitting coil into DC power and outputs the DC power.
• the DC power output from the power receiving circuit is supplied not only to the small motor 700, but also to the power transmitting circuit in the wireless power feeding unit 600 provided in another joint. This also supplies power to the small motor 700 that drives the other joints.
• FIG. 5 is a diagram showing an example of a robot arm device to which the above-described wireless power transmission is applied.
• This robot arm device has a joint" 1 Have 6.
• the wireless power transmission described above is applied to the joints "2" and "4".
• the conventional wire-based power transmission is applied to the joints "1," 3, "5,”"6.
• Robot arm device has joints" 1 1 ⁇ 1 ⁇ / 16 and multiple motors IV_ 1 ⁇ /1 1 ⁇ 1 ⁇ / 16 each driving 6 Motor control circuit (3 I Two wireless power supply units (6 and joints) 2 and 4 provided respectively (intelligent robot harness unit: ⁇ 1 ⁇ 1 II) ⁇ 1 ⁇ 1 11 2, ⁇ 1 ⁇ 1 11 4 ⁇ 02020/174819 7 ⁇ (: 171?2019/049147
• the control unit 500 includes the motors IV! 1, IV! 2, and the wireless power feeding unit.
• Wireless power supply unit ⁇ Transmits the power wirelessly at the joint” 2 via a pair of coils.
• the transmitted electric power is supplied to the motors IV! 3, IV! 4, the control circuits ⁇ I“3, ⁇ “4, and the wireless power feeding unit 1 to 1 II 4.
• the wireless power feeding unit ⁇ Also transmits power wirelessly at the joint” 4 via a pair of coils.
• the transmitted electric power is supplied to the motors 1 ⁇ /1 5, IV! 6, and the control circuits ⁇ I “5, ⁇ "6.
• each wireless power feeding unit not only power transmission but also data transmission may be performed in each wireless power feeding unit.
• a signal for controlling each motor or a signal fed back from each motor may be transmitted between the power transmitting module and the power receiving module in the wireless power feeding unit.
• the data of the image taken by the camera can be transmitted.
• a data group indicating the information obtained by the sensor can be transmitted.
• Such a wireless power feeding unit that simultaneously performs power transmission and data transmission is referred to as a "wireless power transmission device" in the present specification.
• Wireless power data transmission equipment is required to achieve both high quality power transmission and data transmission.
• FIG. 6 is a cross-sectional view showing a configuration example of a portion that performs wireless power transmission and wireless communication of the power transmission module 100 and the power reception module 200 in the wireless power transmission device.
• FIG. 7 is a top view of the power transmission module 100 shown in FIG. 6 as seen along the axis 8. Although FIG. 7 illustrates the structure of the power transmission module 100, the power reception module 200 has a similar structure. Power transmission module 100 and ⁇ 02020/174819 8 ⁇ (:171?2019/049147
• At least one of the power receiving modules 200 can relatively rotate about the axis 8 by an actuator (not shown).
• the actuator may be provided in either the power transmission module 100 or the power reception module 200, or may be provided outside these.
• Transmission module 1 0 0, the power transmission coil 1 1 0, and the communication electrode comprising two electrodes 1 2_Rei 3, 1 2 0 spoon which functions as a differential transmission line, the magnetic core 1 3 0, communication A circuit 140 and a housing 190 that accommodates the circuits are provided.
• two electrodes 1 2_Rei 3, 1 2 0 spoon is sometimes referred to as "communication electrode 1 2 0".
• two electrodes or lines that function as a differential transmission line may be collectively referred to as a “differential transmission line pair”.
• the power transmission coil 110 has a circular shape centered on the axis 8.
• Two electrodes 1 2_Rei 3, 1 2 0 spoon has a (circular with or slit g) arc shape about the axis eight.
• Two electrodes 1 2_Rei 3, 1 2 0 spoon is adjacent spaced between gap.
• the communication electrode 1 20 and the power transmission coil 1 10 are located on the same plane.
• the communication electrode 1 2 0 is located outside the power transmission coil 1 1 0 so as to surround the power transmission coil 1 1 0.
• the power transmission coil 110 is housed in the magnetic core 130.
• the power transmitting coil 110 and the power receiving coil 210 are arranged on the inner diameter side, and the communication electrodes 120, 220 are arranged on the outer diameter side.
• the configuration is not limited to such a configuration, and the arrangement of the pair of power transmission coil 110 and power reception coil 210 and the communication electrodes 120 and 220 may be reversed. That is, the configuration may be such that the communication electrodes 120 and 220 are arranged on the inner diameter side and the power transmission coil 110 and the power receiving coil 210 are arranged on the outer diameter side.
• FIG. 8 is a perspective view showing a structural example of the magnetic core 130.
• the magnetic core 130 shown in FIG. 8 has a concentric inner peripheral wall and an outer peripheral wall, and a bottom surface portion connecting the both.
• the magnetic core 130 does not necessarily have a structure in which the bottom surface portion is connected to the inner peripheral wall and the outer peripheral wall.
• the magnetic core 130 is composed of a magnetic material.
• the magnetic core 130 is arranged so that its center coincides with the axis 8.
• the outer peripheral wall of the magnetic core 1300 is located between the power transmission coil 1110 and the electrode 1208.
• the magnetic core 130 is arranged such that the open portion on the opposite side of the bottom surface faces the power receiving module 200.
• the input/output terminals of the communication circuit 140 are connected to one end 1 2 1 3 of the electrode 1 2 0 3 and one end 1 2 1 of the electrode 1 2 0 3 shown in FIG.
• the communication circuit 1440 supplies two signals having opposite phases and equal amplitudes to one end 1 2 1 3 of the electrode 1 2 0 3 and one end 1 2 1 of the electrode 1 2 0 respectively.
• the communication circuit 1440 receives the two signals sent from one end 1 2 1 3 of the electrode 1 2 0 3 and one end 1 2 1 of the electrode 1 2 0.
• the communication circuit 140 can demodulate the transmitted signal by calculating the difference between the two signals.
• Electrode 1 2_Rei 3, 1 2 0 spoon other end of each of is connected to, for example, ground ( ⁇ 0).
• the two electrodes 1 2_Rei 3, 1 2 0 spoon serves as a differential transmission line.
• Data transmission by differential transmission line is not easily affected by electromagnetic noise. Higher speed data transmission is possible by using the differential transmission line.
• the communication circuit 140 can be arranged at a position facing the two electrodes 1203, 120.
• the communication circuit 140 may be arranged at a position different from the position facing the communication electrode 120.
• the power transmission coil 110 is connected to a power transmission circuit (not shown).
• the power transmission circuit supplies AC power to the power transmission coil 110.
• the power transmission circuit may include, for example, an inverter circuit that converts DC power into AC power.
• the power transmission circuit may include a matching circuit for impedance matching.
• the power transmission circuit may also include a filter circuit for suppressing electromagnetic noise.
• the circuit board on which the power transmission circuit is mounted may be arranged at a position adjacent to the power transmission module 100 on the side opposite to the side on which the power reception module 200 is located, for example.
• the casing 190 is excluding the portion of the power receiving module 200 facing the casing 290. ⁇ 02020/174819 10 ((171?2019/049147
• the housing 190 has a function of suppressing leakage of an electromagnetic field to the outside of the power transmission module 100.
• the power reception module 200 has the same configuration as the power transmission module 100.
• the power receiving module 200 includes a power receiving coil 210, a communication electrode including two electrodes 2203 and 220 which function as a differential transmission line, a magnetic core 230, and a communication circuit. 2 40 and a housing 2 90 accommodating them.
• the configuration of these constituent elements is similar to that of the corresponding constituent elements in the power transmission module 100.
• the two electrodes 2203 and 220 may be collectively referred to as "communication electrode 220".
• the communication circuit 240 is connected to one end of each of the two electrodes 2203 and 220, and transmits or receives two signals having opposite phases and the same amplitude.
• the communication circuit 240 can be arranged in the housing 290 as shown in FIG.
• the power receiving coil 210 is arranged so as to face the power transmitting coil 110.
• Communication electrode 2 2_Rei 3, 2 2 0 spoon of the power receiving side, the transmission side of the communication electrodes 1 2 0 3, are placed 1 2 0 so that each faces the spoon.
• the power transmission coil 110 and the power reception coil 210 perform power transmission by magnetic field coupling.
• Communication electrodes 1 2 0 3 , 1 2 0 and communication electrodes 2 2 0 The two-hundred-third arm carries out data transmission through the coupling between electrodes. Data can be transmitted from either side of the power transmitting module 100 and the power receiving module 200.
• Each of the power transmission module 100 and the power reception module 200 may include two pairs of electrodes that function as a differential transmission line.
• full-duplex communication is possible in which transmission from the power transmission side to the power reception side and transmission from the power reception side to the power transmission side are performed simultaneously.
• the power transmitting coil 110 and the power receiving coil 210 that transmit power by magnetic field coupling are used, but the power transmitting electrode and the power receiving electrode that transmit power by electric field coupling are used. May be.
• the term "antenna” is used as a concept including coils and electrodes used for power transmission. ⁇ 02020/174819 11 ⁇ (: 171?2019/049147
• power and data can be simultaneously wirelessly transmitted between the power transmission module 100 and the power reception module 200. Since a differential transmission line is used in the above configuration, the effect of electromagnetic noise generated from the power transmission unit can be suppressed compared to the form in which single-ended transmission is performed. Therefore, communication quality can be improved.
• a transmission module is used as a power transmission module or a power reception module in a wireless power data transmission device that wirelessly transmits power and data between a power transmission module and a power reception module.
• a transmission module for transmitting or receiving electric field by magnetic field coupling or electric field coupling, a differential transmission line pair for transmitting or receiving electric field coupling, and a position between the antenna and the differential transmission line pair.
• a shield member for reducing electromagnetic interference between the antenna and the differential transmission line pair.
• the shielding member that is located between the antenna and the differential transmission line pair and that reduces electromagnetic interference between the antenna and the differential transmission line pair is arranged. ..
• the shielding member that is located between the antenna and the differential transmission line pair and that reduces electromagnetic interference between the antenna and the differential transmission line pair
• electromagnetic interference refers to interference due to magnetic fields and interference due to electric fields. ⁇ 02020/174819 12 ((171?2019/049147
• reducing electromagnetic interference means reducing at least one of interference due to an electric field, interference due to a magnetic field, and interference due to a combination thereof.
• the antenna may be a coil for performing power transmission or power reception by magnetic field coupling, or may be an electrode for performing power transmission or power reception by electric field coupling.
• Each of the antenna and the differential transmission line pair may have an annular shape.
• the differential transmission line pair is located outside the antenna.
• the differential transmission line pair is located inside the antenna.
• the shielding member may be a metal member having a ring shape, for example.
• a metal member that functions as a shielding member will be referred to as a "conductive shield" in the following description.
• the transmission module may include a second differential transmission line pair in addition to the differential transmission line pair (referred to as a first differential transmission line pair).
• the first differential transmission line pair may be arranged outside the antenna, and the second differential transmission line pair may be arranged inside the antenna.
• full-duplex communication is possible.
• one of the first differential transmission line pair and the second differential transmission line pair is used for transmitting data, and the first differential transmission line pair and the second differential transmission line pair are used.
• the other of the second differential transmission line pair is used for receiving data.
• the transmission module may include a second shielding member in addition to the shielding member (referred to as a first shielding member).
• the first shielding member is located between the antenna and the first differential transmission line pair, and reduces electromagnetic interference between the antenna and the first differential transmission line pair.
• the second shielding member is located between the antenna and the second differential transmission line pair, and reduces electromagnetic interference between the antenna and the second differential transmission line pair.
• Each differential transmission line in the differential transmission line pair may have a first end and a second end positioned via a gap.
• the first end may be a differential signal input/output end.
• the second end may be connected to ground or a resistor
• the differential transmission line pair and the antenna may be arranged on the same plane, for example.
• the differential transmission line pair and the antenna may be arranged on different planes.
• the antenna and the differential transmission line pair may be arranged so as to face each other with the shielding member interposed therebetween.
• the power transmission module and the power reception module may be configured to move relative to each other.
• the power transmission module and the power reception module may be configured to be relatively rotatable about a rotation axis, for example.
• each of the antenna, the differential transmission line pair, and the shielding member may have an annular shape centered on the rotation axis.
• a magnetic body such as the above magnetic core may be arranged between the differential transmission line pair and the coil.
• the differential transmission line pair may be connected to a communication circuit.
• the communication circuit supplies, for example, signals of opposite phases to the differential transmission line pair.
• the communication circuit receives and decodes the signal of the opposite phase sent from the differential transmission line pair. According to such a configuration, the influence of electromagnetic noise can be suppressed as compared with the case where the differential transmission line pair is a single electrode.
• the transmission module may further include a magnetic core located around the coil.
• the magnetic core may be located between the coil and the shield member, and a gap may exist between the magnetic core and the shield member.
• the transmission module may further include an actuator that causes the power transmission module and the power reception module to move relative to each other.
• the actu ⁇ 02020/174819 14 ⁇ (: 171?2019/049147
• the data may include at least one motor.
• the actuator may be provided outside the transmission module.
• the transmission module may further include a power transmission circuit that supplies AC power to the antenna.
• the transmission module functions as a power transmission module.
• the power transmission circuit may include, for example, an inverter circuit.
• the inverter circuit may be connected to a power source and the antenna. The inverter circuit converts the DC power output from the power source into AC power for transmission and supplies the AC power for transmission to the antenna.
• the transmission module may further include a power receiving circuit that converts the AC power received by the antenna into another form of power and outputs the power.
• the power receiving module described above functions as a power receiving module.
• the power receiving circuit may include a power conversion circuit such as a rectifier circuit.
• the power conversion circuit is connected between the antenna and a load.
• the power conversion circuit converts the AC power received by the antenna into DC power or AC power required by the load and supplies the DC power or AC power to the load.
• the transmission module may further include a communication circuit connected to the differential transmission line pair. Two terminals of the communication circuit are connected to the differential transmission line pair.
• the communication circuit functions as at least one of a transmission circuit and a reception circuit. At the time of transmission, the communication circuit supplies signals of opposite phase to the differential transmission line pair.
• a wireless electronic data transmission device wirelessly transmits electric power and data between a power transmission module and a power reception module.
• the wireless power transmitting device includes the power transmitting module and the power receiving module. At least one of the power transmission module and the power reception module may be the transmission module according to any one of the above aspects.
• Both the power transmission module and the power reception module may be the transmission module according to any one of the above aspects. In that case, reduce the influence of power transmission on communication in both the power transmission module and the power reception module. ⁇ 02020/174819 15 ⁇ (:171?2019/049147
• the power transmission module and the power reception module do not have to have the same structure.
• the power transmission module may include the shielding member, and the power receiving module may not include the shielding member.
• the communication quality of data transmission can be improved as compared with the conventional structure.
• the wireless power transmission device can be used as a wireless power feeding unit in a robot arm device as shown in FIG. 1, for example.
• the wireless electronic cadence transmission device can be applied not only to the robot arm device but also to any device having a rotation mechanism or a linear motion mechanism.
• the "load” means any device that operates by electric power.
• the “load” may include devices such as a motor, a camera (imaging device), a light source, a secondary battery, and an electronic circuit (eg, power conversion circuit or microcontroller).
• a device including a load and a circuit that controls the load may be referred to as a “load device”.
• the wireless electronic data transmission device can be used as a component of an industrial robot used in a factory or a work site as shown in FIG. 1, for example.
• Wireless power data transmission equipment is also used for other applications, such as powering electric vehicles. ⁇ 02020/174819 16 ⁇ (: 171?2019/049147
• FIG. 9 is a cross-sectional view showing the configuration of the wireless electronic data transmission device according to this embodiment.
• Fig. 10 is a top view of the power transmission module 100 shown in Fig. 9 as seen along the axis 8.
• the wireless power data transmission apparatus includes a power transmission module 100 and a power reception module 2
• the power transmission module 100 includes a metal conductive shield 1 serving as an electromagnetic shielding member between two electrodes 1 0 2 3 and 1 2 0 which are a differential transmission line pair and a magnetic core 1 30. Equipped with 60.
• the power receiving module 200 is a differential transmission line pair.
• a metallic conductive shield 260 which is an electromagnetic shielding member, is provided between the container 220 and the magnetic core 230. The configuration other than these conductive shields 160 and 260 is similar to that shown in FIG.
• the conductive shield 160 includes a coil 110, an electrode 120
• conductive shield 2 6 0 in the power receiving modules 2 0 has a ring shape about the axis.
• Conductive shield 1 6 0 radius of the annular shape is larger than the radius of the outer peripheral wall of the magnetic core 1 3 0, less than the radius of the inner electrode 1 2 0 3.
• the radius of the annular shape of the conductive shield 260 is larger than the radius of the outer peripheral wall of the magnetic core 230 and smaller than the radius of the inner electrode 2203.
• Each of the conductive shields 160, 260 may have a slit-like shape, that is, an arc shape, like the shape of the communication electrodes 120, 220. In the present disclosure, an arc shape is understood to be included in the “ring shape”.
• the electrode 1 2 0 3 has a first end 1 2 1 3 and a second end 1 2 2 3 located through the gap.
• the electrode 120 C also has a first end 112 C and a second end 122 C that are located through the gap. These first ends 1 2 1 3 and 1 2 1 are the input/output ends of the differential signal. In other words, the input/output terminals of the communication circuit 1440 are connected to the first ends 1123, 1121.
• the second ends 1 2 2 3 and 1 2 2 are terminations and are connected to ground or a resistor.
• the electrodes 2203 and 22013 in the power receiving module 200 have the same structure.
• FIG. 11 is a diagram showing an example of connection at both ends of a differential transmission line pair.
• the first end 1 2 1 3 of the electrode 1 2 0 3 and the first end 1 2 1 of the electrode 1 2 0 3 are different from each other for transmission in the communication circuit 1 4 0.
• the second end portion 1 2 2 3 of the electrode 1 203 and the second end portion 1 2 2 of the electrode 1 2 0 3 are connected to the terminating resistor 3 and the reservoir, respectively.
• the resistors and are connected to each other, and the connection point is connected to the ground ( ⁇ 0).
• the resistance values of terminating resistors 3 and 13 are set so that the reflection at the terminating portion is as small as possible.
• the termination resistance value can be set to an appropriate value for each line, and the reference of the potential of the termination section of each differential line can be made common.
• FIG. 11 Min. is a diagram showing another example of connection at both ends of the differential transmission line pair.
• the termination resistor And ⁇ are individually connected to ⁇ 0.
• the other points are the same as the example shown in Fig. 118.
• FIG. 11 (3 is a diagram showing still another example of connection at both ends of the differential transmission line pair.
• the second end 1 2 2 3 of the electrode 1 2 0 3 is shown.
• the second end 1 2 2 of the electrode 1 2 0 13 are connected to a single terminating resistor [3 ⁇ 4.
• one resistor can be used to terminate between the differential lines. It can be reduced.
• each differential transmission line is connected to a differential driver 1 4 2 for inputting a signal for transmission.
• the differential driver 1 4 2 shown in Fig. 11 to Fig. 11 ⁇ 3 the circuit element for decoding 1 4 3 shown in Fig. 11 is connected to the differential transmission line for reception. obtain.
• the differential transmission line that performs both transmission and reception has a differential transmission line as shown in Fig. 11. ⁇ 02020/174819 18 ⁇ (: 17 2019/049147
• FIG. 12 is an enlarged view of a part of the wireless electronic data transmission device shown in FIG. There is a gap between each of the inner electrode 1230, the conductive shield 1600, and the magnetic core 1300 in the power transmission module 100. Similarly, there is a gap between each of the inner electrode 2203, the conductive shield 160, and the magnetic core 130 in the power receiving module 200.
• a conductive member is arranged between each of 30 and the communication electrode 220.
• the case where the conductive shield is not arranged and the case where the conductive shield is arranged are respectively 3 3 1, 3 4 1, 3 5 1, 3 61 was calculated.
• two types of verification are examined, namely, a case where the distance from the communication electrode is relatively short and a case where the distance from the communication electrode is relatively long.
• aluminum (8) was chosen as the material for the conductive shield. The smaller the values of 3 31, 3 4 1, 3 5 1, and 3 61, the smaller the influence of the magnetic flux generated from the power transmission coil 1 10 on each communication electrode.
• the configuration in which the conductive shield is arranged between the communication electrode and the magnetic core can reduce the noise caused by the power transmission unit that is superimposed on the communication signal. all right.
• FIG. 13 is a diagram showing an example of distribution of electromagnetic field strength when AC power is supplied to the power transmission coil 110.
• the lighter the place the higher the electric field strength.
• the electromagnetic interference between the coils 110 and 210 and the communication electrodes 120 and 220 can be prevented. It turns out that can be suppressed.
• the conductive shield 160 is arranged between the power transmission coil 110 and the communication electrode 120, and the power reception coil 210 and the communication electrode 220 are arranged.
• a conductive shield 260 is disposed between and. Magnetic cores 1 3 0 and 2 3 0 are arranged around the coils 1 1 0 and 2 1 0, respectively.
• both the power transmission module 100 and the power reception module 200 are provided with the conductive shield.
• the structure is not limited to such a structure, and the improvement effect can be obtained even when only one of the power transmission module 100 and the power reception module 200 has a conductive shield.
• the conductive shield does not necessarily have to be plate-shaped, and may have any shape.
• Each conductive shield may be formed of a metal such as copper or aluminum.
• the following configurations may be used as a conductive shield or their substitutes.
• conductive tape eg, copper tape, aluminum tape, etc.
• Conductive plastic for example, a material made by mixing a metal filler into plastic
• Each conductive shield in this embodiment has a ring-shaped structure along the power transmission coil or the power reception coil and the communication electrode.
• Each conductive shield may have a structure having a gap in a 0 shape (that is, an arc shape) like each communication electrode. Even in that case, the energy loss due to the generation of the eddy current can be reduced.
• the shield may, for example, have a polygonal or elliptical shape when viewed in the direction along the axis 8. You may join a several metal plate and may comprise a shield.
• each conductive shield has one or more holes or slits. ⁇ 02020/174819 21 ⁇ (: 171?2019/049147
• the power transmission coil or the power reception coil and the communication electrode have an annular structure, and both are rotatable with the same shaft as the rotation shaft.
• Communication electrodes are arranged outside each of the power transmission coil and the power reception coil in a radial direction of a circle around the rotation axis.
• the structure is not limited to such a structure, and the communication electrodes may be arranged inside the power transmitting coil and the power receiving coil, for example. If a shielding member is placed between the coil and the communication electrode, mutual interference can be suppressed.
• each coil and each communication electrode may have a shape that does not require rotation.
• each coil and each communication electrode may have a rectangular or elliptical (elliptical) structure extending in the first direction (vertical direction in FIG. 14).
• the power transmission coil 110 and the communication electrode 120, and the power reception coil 210 and the communication electrode 220 can be configured to be relatively movable in the first direction by the actuator.
• the power receiving coil 210 and the communication electrode 220 in the power receiving module 200 are smaller than the power transmitting coil 110 and the communication electrode 120 in the power transmitting module 100. Even if the power receiving module 200 moves with respect to the power transmitting module 100, their facing state is maintained. Therefore, power transmission and data transmission can be performed while moving.
• FIG. 15 is a diagram showing another example of the wireless electronic data transmission device.
• the power transmission module 100 includes a control device 150
• the power reception module 200 includes a control device 250.
• the controller 150 supplies AC power for power transmission to the power transmission coil 110, and AC power for signal transmission to the communication electrode 120.
• the control device 250 of the power receiving module 200 converts the AC power received by the power receiving coil 210 from the power transmitting coil 110 into another form of power and supplies it to a load device such as a motor, and also performs communication. Demodulates the signal sent from electrode 220.
• the communication electrode 120 is placed adjacent to the power transmission coil 110 and ⁇ 02020/174819 22 ⁇ (:171?2019/049147
• the signal electrode 220 is arranged adjacent to the power receiving coil 210.
• the power receiving module 200 moves in translation with respect to the power transmitting module 100 by a linear motion mechanism such as a linear actuator.
• Figs. 16 and 16 are cross-sectional views showing another modification of the present embodiment.
• the power transmission module 100 may include the conductive shield 160, and the power receiving module 200 may not include the conductive shield 260.
• the power receiving module 200 may include the conductive shield 260 and the power transmitting module 100 may not include the conductive shield 160.
• electromagnetic interference between the antenna and the differential transmission line pair is reduced as compared with the conventional configuration. The effect of reducing is obtained.
• FIG. 17 is a cross-sectional view showing still another modification of the present embodiment.
• Figure 17 is a top view of the power transmission module 100 shown in Figure 17 8 as viewed along the axis 8.
• FIG. 17 shows an example of the structure of the power transmission module 100
• the power reception module 200 also has a similar structure.
• the communication electrode 120 on the power transmission side (that is, the differential transmission line pair) is arranged inside the power transmission coil 110 (that is, the power transmission antenna).
• the communication electrode 220 on the power receiving side is arranged inside the power receiving coil 210 (that is, the power receiving antenna).
• a conductive shield 160 is arranged between the communication electrode 120 on the power transmission side and the power transmission coil 110.
• a conductive shield 260 is arranged between the communication electrode 220 on the power receiving side and the power receiving coil 210. Even if the differential transmission line pair for communication is located inside the power transmitting antenna or the power receiving antenna as in the present modification, the same function as in the above-described embodiment is achieved.
• each of the power transmission module 100 and the power reception module 200 has only one pair of differential transmission line pairs that function as communication electrodes.
• Each of the power transmission module 100 and the power reception module 200 may include two or more pairs of differential transmission lines that function as communication electrodes.
• the transmission from the power transmission module 100 to the power reception module 200 and the power reception module ⁇ 02020/174819 23 ⁇ (: 171?2019/049147
• Full-duplex communication is possible in which transmission from the module 200 to the power transmission module 100 is performed at the same time.
• FIG. 188 and Fig. 18 M shows an example of a configuration capable of full-duplex communication.
• FIG. 188 is a cross-sectional view of the power transmission module 100 and the power reception module 200.
• FIG. 18 M is a top view of the power transmission module 100 shown in FIG.
• FIG. 18M illustrates the structure of the power transmission module 100, the power reception module 200 also has a similar structure.
• the power transmission module 100 in this example includes the first communication electrode 1208 (first differential transmission line pair), the first communication circuit 1408, and the first conductive shield. 1608 (first shield member), magnetic core 1300, power transmission coil 1110, second conductive shield 1660 (second shield member), and second communication electrode 120 (second differential transmission line pair). Each of these components has a circular or arcuate shape when viewed along axis 8.
• the first communication electrode 1208 is located outside the power transmission coil 1100, and the second communication electrode 1120 is located inside the power transmission coil 1110.
• the first conductive shield 1608 is located between the first communication electrode 1208 and the power transmission coil 110.
• the second conductive shield 1600 is located between the power transmission coil 110 and the second communication electrode 1120.
• the first communication circuit 1480 is connected to the first communication electrode 1208.
• the second communication circuit 1440 is connected to the second communication electrode 1240.
• the connection between the first communication circuit 1440 and the first communication electrode 120, and the connection between the second communication circuit 1440 and the second communication electrode 120 This is the same as the connection mode described with reference to Fig. 11 from Fig. 11.
• the power reception module 200 also has the same structure as the power transmission module 100. That is, the power receiving module 200 in this example includes a third communication electrode 2208 (third differential transmission line pair), a third communication circuit 2408, and a third conductive circuit. Shield 260, magnetic core 230, power receiving coil 210, third conductive shield 260, fourth communication electrode 220 (4th differential transmission Track pair) and. Each of these components is either circular or circular when viewed along axis 8. ⁇ 02020/174819 24 ⁇ (: 171?2019/049147
• the third communication electrode 2208 is located outside the power receiving coil 210, and the fourth communication electrode 220 is located inside the power receiving coil 210.
• the third conductive shield 2608 is located between the third communication electrode 2208 and the power receiving coil 210.
• the fourth conductive shield 260 is located between the power receiving coil 210 and the fourth communication electrode 220.
• the third communication circuit 2408 is connected to the third communication electrode 2208.
• the fourth communication circuit 240 is connected to the fourth communication electrode 220. For example, the connection between the third communication circuit 2480 and the third communication electrode 2208, and the connection between the fourth communication circuit 2480 and the fourth communication electrode 220 This is the same as the connection state described with reference to Fig. 1 1 1-8.
• each of the power transmission module 100 and the power reception module 200 is provided with two pairs of differential transmission line for communication, so that full-duplex communication can be realized.
• one of the communication electrodes 120 8 and 120 0 in the power transmission module 100 is used for data transmission, and the other of the communication electrodes 1 20 8 and 120 20 is used. Is used for receiving data.
• one of the communication electrodes 220 and 220 in the power receiving module 200 is used for reception of data, and the other of the communication electrodes 220 and 220 is used for data transmission. Used.
• the difference in frequency characteristics due to the difference in length between the outer differential transmission line pair and the inner differential transmission line pair may be used to selectively use the communication speed. For example, in a system where the transmission speed differs between transmission and reception, the inner differential transmission line pair is used for relatively high-speed communication, and the outer differential transmission line pair is used for relatively low-speed communication. May be.
• differential transmission line pairs for communication on the outside and inside of the power transmitting coil 110 or the power receiving coil 210, respectively, as in the example shown in Figs.
• the size of the device can be suppressed. It is possible to arrange two pairs of working transmission lines only on the outside or inside of the coil, but in that case,
• the coil is placed outside and inside, respectively. ⁇ 02020/174819 25 ⁇ (: 171?2019/049147
• a differential transmission line pair is arranged, and a conductive shield is provided between the coil and each differential transmission line pair. For this reason, it is not necessary to excessively widen the distance between each differential transmission line pair and the coil, and it is possible to suppress the increase in size of the device.
• the two conductive shields may be provided in each of the power transmission module 100 and the power receiving module 200. Further, the conductive shield may be provided only on one of the power transmission module 100 and the power receiving module 200.
• FIG. 189 and FIG. 19M are diagrams showing modified examples of the embodiment shown in FIG. 188 and FIG. 18M.
• FIG. 198 is a cross-sectional view of the power transmission module 100 and the power reception module 200.
• FIG. 19M is a top view of the power transmission module 100 shown in FIG. Although FIG. 19M illustrates the structure of the power transmission module 100, the power reception module 200 also has a similar structure.
• each of power transmission module 100 and power reception module 200 has a cavity extending along the axis in the central portion.
• the wiring or rotating shaft of the robot in which the power transmission module 100 and the power receiving module 200 are incorporated can be passed through the cavity.
• the coil is used as the antenna, but instead of the coil, an electrode for transmitting electric power by electric field coupling (also referred to as capacitive coupling) may be used.
• the power transmission module 100 may include the power transmission electrode 1108 and the power reception module 200 may include the power reception electrode 2108.
• the power transmitting electrode 110 and the power receiving electrode 2108 are both divided into two parts, and the two parts may be configured so that an alternating voltage of opposite phase is applied. Power is wirelessly transmitted from the power transmitting electrode 1 108 to the power receiving electrode 2 108 by capacitive coupling between the power transmitting electrode 1 108 and the power receiving electrode 2 108.
• the power transmission coil 1 110 and the power reception coil 2 10 may be replaced by a power transmission electrode 1 108 and a power reception electrode 2 108.
• FIG. 21 is a block diagram showing the configuration of a system including a wireless electronic data transmission device.
• the system includes a power source 200, a power transmission module 100, a power receiving module 200, and a load 300.
• the load 300 in this example includes a motor 3 1, a motor inverter 33, and a motor control circuit 35.
• the load 300 is not limited to the device including the motor 31 and may be any device that operates by electric power, such as a battery, a lighting device, and an image sensor.
• the load 300 may be a power storage device that stores electric power, such as a secondary battery or a storage capacitor.
• the load 300 may include an actuator including a motor 3 1 that relatively moves (eg, rotates or linearly moves) the power transmission module 100 and the power reception module 200.
• the power transmission module 100 includes a power transmission coil 1 10 and a communication electrode 120 (electrode 1
• the power transmission circuit 13 is connected between the power supply 20 and the power transmission coil 1 10 and converts the DC power output from the power supply 20 into AC power and outputs the AC power.
• the power transmission coil 110 sends out the AC power output from the power transmission circuit 13 to the space.
• the power transmission control circuit 15 is, for example, a microcontroller unit. Hereinafter, it is also referred to as "mycon". ) And a gate driver circuit.
• the power transmission control circuit 15 controls the frequency and voltage of the alternating power output from the power transmission circuit 13 by switching the conduction/non-conduction states of the plurality of switching elements included in the power transmission circuit 13.
• the power transmission control circuit 15 is connected to the electrodes 1 2 0 3 and 1 2 0 13 and also transmits/receives a signal via the electrodes 1 2 0 3 and 1 2 013.
• the power receiving module 200 includes a power receiving coil 210 and a communication electrode 220 (electrode 2
• the power receiving coil 210 is electromagnetically coupled to the power transmitting coil 110 and receives at least a part of the electric power transmitted from the power transmitting coil 1110.
• a rectifier circuit that converts the AC power output from the power receiving coil 210 into, for example, DC power and outputs the DC power.
• the power reception control circuit 2 5 is connected to the electrode 2 2 0 3 and 2 2 0 spoon also performs transmission and reception of the electrodes 2 2 0 3 and 2 2 0 signal through the spoon.
• Load 300 is motor 31, motor inverter 33, motor control circuit
• the motor 31 in this example is a servomotor driven by three-phase AC, but may be another type of motor.
• the motor inverter 3 3 is a circuit that drives the motor 3 1 and includes a three-phase inverter circuit.
• the motor control circuit 35 is a circuit such as 1//II that controls the motor inverter 33.
• the motor control circuit 35 causes the motor inverter 33 to output a desired three-phase AC power by switching the conduction/non-conduction states of the plurality of switching elements included in the motor inverter 33.
• FIG. 22 28 is a diagram showing an example of an equivalent circuit of the power transmitting coil 110 and the power receiving coil 210.
• each coil functions as a resonance circuit having an inductance component and a capacitance component.
• AC power is supplied from the power transmission circuit 13 to the power transmission coil 110. Due to the magnetic field generated from the power transmission coil 110 by this AC power, the power is transmitted to the power reception coil 210.
• both the power transmitting coil 110 and the power receiving coil 210 function as a series resonance circuit.
• FIG. 22 is a diagram showing another example of an equivalent circuit of the power transmitting coil 1 10 and the power receiving coil 2 10.
• the power transmission coil 110 functions as a series resonance circuit
• the power reception coil 210 functions as a parallel resonance circuit.
• a mode in which the power transmission coil 110 constitutes a parallel resonance circuit is also possible.
• Each coil is, for example, a plane coil or a laminated coil formed on a circuit board, or a wound coil using a lit wire or a twisted wire formed of a material such as copper or aluminum. obtain.
• Each capacitance component in the resonant circuit is realized by the parasitic capacitance of each coil. ⁇ 02020/174819 28 ⁇ (: 171?2019/049147
• a capacitor having a chip shape or a lead shape may be separately provided.
• the resonance frequency C0 of the resonance circuit is typically set to match the transmission frequency C1 during power transmission.
• the resonant frequency of each resonant circuit does not have to exactly match the transmission frequency.
• each resonance frequency may be set to a value within the range of about 50 to 150% of the transmission frequency channel 1.
• the frequency 1 of power transmission is, for example, 5 0 1 ⁇ 1 2 ⁇ 3 0 0 ⁇ 1 ⁇ 12 2, in some cases 2 0 1 ⁇ 1 ⁇ 1 2 ⁇ 1 0 0 1 ⁇ 1 2, in other examples
• Figs. 23 and 23 are diagrams showing a configuration example of the power transmission circuit 13.
• Figure 2
• the power transmission control circuit 15 controls the on/off of the four switching elements 3 1 to 34 included in the power transmission circuit 13 to change the input DC power to a desired frequency Convert to AC power with voltage V (effective value).
• the power transmission control circuit 15 may include a gate driver circuit that supplies a control signal to each switching element.
• Figure 23 3 shows an example of the configuration of a half-bridge type inverter circuit.
• the power transmission control circuit 15 controls the on/off of the two switching elements 31 and 32 included in the power transmission circuit 13 so that the input DC power has a desired frequency 1 and voltage. Convert to AC power with V (effective value).
• the power transmission circuit 13 may have a structure different from the structures shown in FIGS.
• the power transmission control circuit 15, the power reception control circuit 25, and the motor control circuit 35 are, for example, a microcontroller unit. Can be realized by a circuit including a processor and a memory. Various controls can be performed by executing the computer program stored in the memory.
• the power transmission control circuit 15, power reception control circuit 25, and motor control circuit 35 may be configured by dedicated hardware configured to execute the operation of the present embodiment.
• the power transmission control circuit 15 and the power reception control circuit 25 also function as communication circuits. ⁇ 02020/174819 29 ⁇ (:171?2019/049147
• the power transmission control circuit 15 and the power reception control circuit 25 are connected to the communication electrodes 120,
• the motor 31 can be, but is not limited to, a motor driven by a three-phase alternating current, such as a permanent magnet synchronous motor or an induction motor.
• the motor 31 may be another type of motor such as a DC motor.
• the motor inverter 33 which is a three-phase inverter circuit, a motor drive circuit corresponding to the structure of the motor 31 is used.
• the power supply 20 can be any power supply that outputs a DC power supply.
• the power source 20 is, for example, a commercial power source, a primary battery, a secondary battery, a solar cell, a fuel cell, a US B (Universal Serial Bus) power source, a high-capacity capacitor (for example, an electric double layer capacitor), a commercial power source. It can be any power source, such as a voltage converter connected to.
• a wireless power transmission system includes a plurality of wireless power feeding units and a plurality of loads. Multiple wireless power feed units are connected in series to power one or more loads connected to each.
• Fig. 24 is a block diagram showing a configuration of a wireless power transmission system including two wireless power feeding units.
• This wireless power transmission system includes two wireless power supply units 10A and 10B and two loads 300A and 300B.
• the number of each of the wireless charging unit and the load is not limited to two and may be three or more.
• Each of the power transmission modules 100A and 100B has the same configuration as the power transmission module 100 in the above-described embodiment.
• Each of the power receiving modules 200 A and 200 B has the same configuration as the power receiving module 200 in the above-described embodiment.
• the loads 300 A and 300 B are supplied from the power receiving modules 200 A and 200 B, respectively.
• FIG. 25A to FIG. 25C are diagrams schematically showing types of configurations of the wireless power transmission system in the present disclosure.
• Figure 25A shows one wireless charging unit 10 ⁇ 02020/174819 30 ⁇ (:171?2019/049147
• FIG. 1 illustrates a wireless power transmission system that includes Fig. 25 ⁇ shows a wireless power transmission system in which two wireless power supply units 108 and 10 are provided between the power source 20 and the terminal load 300 ⁇ .
• Fig. 250 shows a wireless power transmission system in which three or more wireless power supply units 108 to 100 are provided between the power supply 20 and the end load device 300X.
• the technique of the present disclosure can be applied to any of the forms shown in FIGS.
• the configuration shown in FIG. 250 can be applied to an electric device such as a robot having many movable parts, as described with reference to FIG. 1, for example.
• the configuration of the above-described embodiment may be applied to all wireless power feeding units 108 to 100, or only some wireless power feeding units may be used. The configuration described above may be applied.
• the technology of the present disclosure can be used for an electric device such as a robot, a surveillance camera, an electric vehicle, or a multicopter used in a factory or a work site.

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• Computer Networks & Wireless Communication (AREA)
• Power Engineering (AREA)
• Signal Processing (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Manipulator (AREA)
• Near-Field Transmission Systems (AREA)

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• 2019
  • 2019-12-16 JP JP2021501612A patent/JPWO2020174819A1/ja active Pending
  • 2019-12-16 WO PCT/JP2019/049147 patent/WO2020174819A1/ja not_active Ceased
  • 2019-12-16 CN CN201980093023.2A patent/CN113491073A/zh active Pending
  • 2019-12-16 US US17/434,037 patent/US20220149668A1/en not_active Abandoned

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