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Wireless power supply system

A wireless power supply and antenna technology, applied in electromagnetic wave systems, in-body radio detectors, electrical components, etc., can solve problems such as unstable magnetic field direction, difficult power transmission, power transmission direction, and current instability

Active Publication Date: 2014-09-03
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the current flowing through the power transmission coil group becomes unstable, which in turn causes the direction of the magnetic field generated in the power transmission coil group to become unstable
[0011] That is, in the proposal described in Japanese Patent Application Laid-Open No. 2004-159456, there is a problem that it is difficult to appropriately control the amount of power to be transmitted and the direction of power transmission, resulting in a decrease in power supply efficiency.

Method used

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no. 1 approach

[0028] First, refer to figure 1 The configuration of the wireless power feeding system will be described. figure 1 It is a schematic diagram illustrating the configuration of the wireless power feeding system according to the first embodiment of the present invention.

[0029] exist figure 1 Among them, the wireless power supply system mainly includes three groups of power transmission antennas 44, 54, 64, drive devices 41, 51, 61 for driving these power transmission antennas, a control device 70, and an electrical connection with the drive devices 41, 51, 61 and the control device 70. A power supply 40 for supplying them with power, wherein the control device 70 controls whether the current flows through the capacitors 42 , 52 , 62 or not through the capacitors 42 , 52 , 62 .

[0030] The power supply 40 uses an alternating current (AC) power supply, a direct current (DC) converted power supply from an alternating current power supply, a direct current (DC) power supply,...

no. 2 approach

[0052] Next, use Figure 4 The wireless power feeding system according to the second embodiment of the present invention will be specifically described. Figure 4 It is a schematic diagram illustrating the configuration of the wireless power feeding system according to the second embodiment of the present invention.

[0053] The structure of the wireless power supply system according to this embodiment is different from the circuit structure of the power transmission antennas 144, 154, and 164 corresponding to the X-axis, Y-axis, and Z-axis, respectively. figure 1 Since the wireless power feeding system of the first embodiment described is the same, only the circuit configuration of the power transmission antennas 144 , 154 , and 164 will be described here, and the same reference numerals will be attached to the same constituent elements, and descriptions will be omitted.

[0054] In addition, the power transmission antennas 144, 154, and 164 on the X-axis, Y-axis, and Z-axi...

no. 3 approach

[0061] Next, use Figure 5 The wireless power feeding system according to the third embodiment of the present invention will be specifically described. Figure 5 It is a schematic diagram illustrating the configuration of the wireless power feeding system according to the third embodiment of the present invention.

[0062] The structure of the wireless power supply system of this embodiment is not only the circuit structure of the power transmission antennas 244, 254, 264 corresponding to the X-axis, Y-axis, and Z-axis, but also the figure 1 Since the wireless power feeding system of the first embodiment described is the same, only the circuit configurations of the power transmission antennas 244 , 254 , and 264 will be described here, and the same reference numerals will be attached to the same structural elements, and descriptions will be omitted.

[0063] In addition, the power transmission antennas 244, 254, and 264 on the X-axis, Y-axis, and Z-axis have the same circuit...

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Abstract

The present invention relates to a wireless power supply system for wirelessly supplying power from outside the body to an in-vivo information acquisition device such as a capsule endoscope that operates inside the body. The wireless power feeding system includes: a plurality of power transmission antennas, each of which has a resonant circuit including a power transmission coil and a capacitor arranged to generate a magnetic field in a desired direction; control the respective resonance states of the power transmission antennas; a plurality of drive devices that apply AC voltages to the multiple power transmission antennas to drive the respective power transmission antennas; and a power supply that supplies voltage to the multiple drive devices, Among them, the control device controls one power transmission antenna that generates a magnetic field to be in a resonant state, and controls the other power transmission antennas that do not generate a magnetic field to be in a non-resonant state.

Description

technical field [0001] The present invention relates to a wireless power supply system for wirelessly supplying power from outside the body to an in-vivo information acquisition device such as a capsule endoscope that operates inside the body. Background technique [0002] Conventionally, as a wireless power supply system for supplying power from the outside of the body to a predetermined device such as a capsule endoscope that operates in the subject's body in a non-contact manner, as disclosed in Japanese Patent Application Laid-Open No. 2004-159456, for example, a A wireless power supply system that induces electrical energy from a secondary coil provided in a device by passing a current through a primary coil provided in the wireless power supply system. [0003] Use below Figure 10 and Figure 11 The configuration of the primary coil provided in the wireless power feeding system in the proposal described in Japanese Patent Application Laid-Open No. 2004-159456 will be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J17/00A61B1/00A61B5/07
CPCH02J5/005A61B2560/0214H02J17/00A61B1/00029A61B1/041H02J50/12H02J50/402H02J2310/23
Inventor 祝迫洋志
Owner OLYMPUS CORP