Wireless power transmission device, and power generation device provided with wireless power transmission device

A technology for wireless power transmission and power generation devices, applied in circuit devices, battery circuit devices, transportation and packaging, etc., can solve the problems of reducing the high boost ratio of series-connected units, insufficient problems, and deterioration of characteristics, etc. The effect of reducing the number of connections, reducing the cost of laying, and reducing the deterioration of characteristics

Active Publication Date: 2012-07-11
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The more the number of units or modules connected in series increases, when part of the laying area is in the shade (partial shading: partial shading), or when the characteristics of a part of the laying units or modules deteriorate, it is easier to cause system failure. overall performance degradation
In order to avoid such problems, although it is generally carried out to introduce bypass diodes into the module, it will cause problems such as heat generation or cost increase, which is not preferred.
On the other hand, even if a general DC / DC converter with a boost function is used to boost the voltage, it is difficult to efficiently realize a high boost ratio that can greatly reduce the number of cells connected in series
[0016] In addition, the boosting characteristics of the wireless power transmission device in Patent Document 2 are only the boosting characteristics brought about by the existing transformer technology, which is not sufficient for solving the problem of the present invention.

Method used

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  • Wireless power transmission device, and power generation device provided with wireless power transmission device
  • Wireless power transmission device, and power generation device provided with wireless power transmission device
  • Wireless power transmission device, and power generation device provided with wireless power transmission device

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Experimental program
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Embodiment approach 1

[0097] First, refer to Figure 12 as well as Figure 13 , the first embodiment of the power generating device of the present invention will be described. Figure 12 is a schematic perspective view showing the present embodiment, Figure 13 yes Figure 12 An equivalent circuit diagram of the wireless transmission unit 105 shown. exist Figure 12 , Figure 13 in, right with Figure 5 , Image 6 The structural elements corresponding to the illustrated structural elements are given the same reference signs.

[0098] The power generating device of this embodiment, such as Figure 7 As shown, there are multiple generating units whose outputs are connected in parallel, each generating unit, such as Figure 12 As shown, there is a configuration in which a power generation unit 101 , an oscillator 103 , and a wireless transmission unit 105 are connected in series.

[0099] The power generation unit 101 in this embodiment has a plurality of solar cells (cells) connected in ser...

Embodiment approach 2

[0175] Next, refer to Figure 19 , the second embodiment of the power generating device of the present invention will be described.

[0176] The first point of difference between the power generation device of this embodiment and the power generation device of the first embodiment is that a rectification circuit 115 for converting RF power into DC power is connected in series after the synthesis unit 199 . By employing such a configuration, it is possible to output received power received by a plurality of power receiving antennas 109 as DC power.

[0177] According to the power generating device of the present embodiment, the same effects as those of the power generating device of the first embodiment can be obtained, and DC electric power can be obtained as an output.

[0178] In order to suppress multiple reflections of RF power between circuit blocks and improve the overall power generation efficiency, it is preferable to set the output impedance of the oscillator 103 to ...

Embodiment approach 3

[0188] Next, refer to Figure 21 , an embodiment of the power generating device of the present invention will be described. Figure 21 is a block diagram of the power generator in this embodiment. exist Figure 21 Herein, the same reference numerals are assigned to the same components as those of the power generating device in the above-mentioned embodiment, and detailed description thereof will be omitted.

[0189] Figure 21 The power generating device includes a plurality of power generating units 131a, 131b...131n connected in parallel. The power generating units 131a to 131n in this embodiment are all the power generating devices of Embodiment 2, but in order to obtain the effect of the present invention, at least two power generating devices connected in parallel need only be the power generating devices of the present invention.

[0190] Each power generation unit 131 a to 131 n has a solar power generation unit 101 , an oscillator 103 , a feeding antenna 107 , a po...

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Abstract

A wireless power transmission unit includes oscillators (103) that convert DC energy into RF energy with a frequency (f0), power transmitting antennas (107), and power receiving antennas (109). Each power transmitting antenna (107) is a series resonant circuit in which a power transmitting inductor (107a) and a first capacitor (107b) are connected in series. Each power receiving antenna (109) is a parallel resonant circuit in which a power receiving inductor (109a) and a second capacitor (109b) are connected in parallel. If the oscillator (103) has a voltage step-up ratio Voc, the power transmitting inductor (107a) has an inductance L(1), the power receiving inductor has an inductance L2, and the power transmitting and power receiving antennas and have a coupling coefficient k, (L2 / L1)>=4(k / Voc)2 is satisfied. The absolute value of the phase difference [theta]res between the respective resonant magnetic fields of first and second pairs of resonant antennas is set to fall within the range of 90 to 180 degrees.

Description

technical field [0001] The present invention relates to a magnetic resonance type wireless power transmission device that transmits electric power in a contactless manner using resonant magnetic field coupling instead of electromagnetic induction or propagation of electromagnetic waves. Furthermore, the present invention relates to a power generating device that increases the voltage of electric energy generated by a power generating unit such as a solar cell by electromagnetic resonance type wireless power transmission. Background technique [0002] In a general solar power generation device, a plurality of solar battery cells (hereinafter, sometimes simply referred to as "cells") are arranged in a metal frame, and a "solar battery module" connected between the battery cells is used. A glass plate is provided on the front surface of a solar battery module (hereinafter, sometimes simply referred to as a "module"), and each unit operates in a state sealed from the atmosphere....

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H02J17/00H02J7/35H02J50/00H02J50/10H02J50/12H02J50/40H02J50/70
CPCH02J7/35H02J5/005H01Q1/248H01Q3/26H01Q7/00H02J50/12H02J50/20H02J50/40H02J50/70
Inventor菅野浩
OwnerPANASONIC CORP