Resonant power-transfer system and resonant power-transmission device

A power transmission and resonance technology, which is applied in transmission systems, near-field transmission systems, circuit devices, etc., can solve problems such as large-scale, and achieve the effect of reducing power transmission

Inactive Publication Date: 2016-08-10
MITSUBISHI ELECTRIC ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, there is a problem that the entire device is enlarged due to the part of the sensor coil 102

Method used

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  • Resonant power-transfer system and resonant power-transmission device
  • Resonant power-transfer system and resonant power-transmission device
  • Resonant power-transfer system and resonant power-transmission device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0020] figure 1 It is a figure which shows the structure of the resonance type power transmission system concerning Embodiment 1 of this invention.

[0021] A resonance type power transmission system is used to transmit electric power including electric signals. Such as figure 1 As shown, this resonance type power transmission system is composed of first and second resonance type transmission power supply units 1a and 1b, first and second transmission antennas 2a and 2b, first and second reception antennas 3a and 3b, and reception power supply unit 4. Here, the first resonance type transmitting power supply device 1a, the first transmitting antenna 2a, and the first receiving antenna 3a are a power transmission transmission and reception system for performing main power transmission. The second resonance type transmitting power supply unit 1b, the second transmitting antenna 2b, and the second receiving antenna 3b are a foreign object detection transmission and reception s...

Embodiment approach 2

[0057] image 3 It is a figure which shows the structure of the resonance type power transmission system concerning Embodiment 2 of this invention. Should image 3 In the resonant power transmission system according to Embodiment 2 shown, an identification signal generating circuit 411 and a state signal generating circuit 412 are added to the starting circuit 41 of the receiving power supply device 4 . The other structures are the same, and the same reference numerals are used to describe only the different parts.

[0058] in addition, image 3 In the example shown, the transmission and reception system for power transmission performs power transmission using the 6.78 MHz frequency band as the transmission frequency, and the transmission and reception system for foreign object detection performs power transmission using the 13.56 MHz frequency band as the transmission frequency, but the present invention is not limited thereto. In addition, each frequency band mentioned ab...

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Abstract

A second resonant transmitting power-supply device (1b) is provided with the following: a transmission-power-state detection circuit (11b) that detects the transmission-power state of a second transmission antenna (2b); a foreign-object detection circuit (124b) that uses detection results from the transmission-power-state detection circuit (11b) to detect the presence or absence of foreign objects within the bounds of overlapping electromagnetic fields; and a power control circuit (125b) that controls a first resonant transmitting power-supply device (1a) so as to reduce or stop the supply of power to a first transmission antenna (2a) if a foreign object has been detected by the foreign-object detection circuit (124b).

Description

technical field [0001] The present invention relates to a resonance type power transmission system and a resonance type power transmission device that detect the presence or absence of a foreign object in an electromagnetic field generated by a transmitting antenna, and reduce or stop power transmission when the foreign object is detected. Background technique [0002] Such as Figure 5 As shown, among conventional power supply devices, there is known a power supply device having a function of detecting the presence or absence of a foreign object (for example, refer to Patent Document 1). In the power supply device disclosed in Patent Document 1, a plurality of sensor coils 102 ( Figure 5 Only one is shown in the drawing), and foreign objects present in the periphery 103 of the sensor coil 102 are detected. The receiving antenna (not shown) side also has the same structure. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Paten...

Claims

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Application Information

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IPC IPC(8): H02J50/60H02J50/20
CPCH02J50/60H02J50/12H02J7/00034H02J50/402H02J50/80H02J50/005H03H7/38H04B5/79
Inventor 阿久泽好幸酒井清秀江副俊裕伊藤有基
Owner MITSUBISHI ELECTRIC ENG CO LTD
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