The structure of the wireless power transmission device and its metal foreign object detection coil

A wireless power transmission, metal foreign body technology, applied in circuit devices, coils, circuits, etc., can solve problems such as difficulty and achieve the effect of avoiding heating

Active Publication Date: 2020-11-10
AUTOMOTIVE RES & TESTING CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the measurement results of these multiple parameters will be affected by the electromagnetic wave transmission distance, especially when the size of the metal foreign object is smaller than the size of the transmitting antenna, making it difficult to accurately determine the electromagnetic wave generated by the metal foreign object entering the wireless power transmission device within the range

Method used

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  • The structure of the wireless power transmission device and its metal foreign object detection coil
  • The structure of the wireless power transmission device and its metal foreign object detection coil
  • The structure of the wireless power transmission device and its metal foreign object detection coil

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Embodiment Construction

[0029] Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

[0030] Please refer to Figure 1 to Figure 3 The wireless power transmission device 10 of the present invention includes an AC / DC converter 11, a DC / AC converter 12, a transmitting antenna 13, a plurality of metal foreign object detection coils 14, a reference voltage generation circuit 15, and a plurality of feedback detection Circuit 16 and a controller 17 .

[0031] Please refer to figure 1 and image 3 , the input end of the AC / DC converter 11 is for receiving an AC power source, for example, the AC power source may be AC ​​power provided by a commercial power supply, and the AC / DC converter 11 converts the AC power source into a DC power source. The input end of the DC / AC converter 12 is electrically connected to the output end of the AC / DC converter 11 to receive the DC power and convert the DC power into an AC output...

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PUM

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Abstract

Disclosed are a wireless electric power transmission apparatus and a metal foreign substance detection coil structure thereof. According to the wireless electric power transmission apparatus, electromagnetic wave is radiated to the outside through a transmitting antenna, and multiple metal foreign substance detection coils sense the electromagnetic wave and correspondingly generate multiple to-be-detected signals; and each metal foreign substance detection coil consists of three coil units connected in series, and the three coil units are arranged at intervals, wherein the distribution region of the transmitting antenna covers the multiple metal foreign substance detection coils. Whether a metal foreign substance enters the range of the electromagnetic wave of the transmitting antenna or not can be judged according to a reference voltage signal and the multiple to-be-detected signals corresponding to the multiple metal foreign substance detection coils by adoption of a controller, so that electromagnetic wave generation can be stopped when the metal foreign substance is detected, in order to avoid heating of the metal foreign substance by electromagnetic wave.

Description

technical field [0001] The invention relates to a wireless power transmission device and its coil structure, in particular to a wireless power transmission device with metal foreign object detection function and the structure of the metal foreign object detection coil. Background technique [0002] The existing wireless power transmission device mainly includes an AC / DC converter, a DC / AC converter and a transmitting antenna connected in sequence. The input terminal of the AC / DC converter can be used to receive the AC power provided by the mains, the AC / DC converter converts the AC power into a DC power, the DC / AC converter is used to receive the DC power, and The DC power is converted into an AC output power, and the DC / AC converter radiates electromagnetic waves from the AC output power through the transmitting antenna. In this way, a receiving device with a wireless charging function senses the electromagnetic wave from the transmitting antenna, and the receiving device ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/20H02J50/60H01F5/00
CPCH01F5/00
Inventor 黄子浩卢建智
Owner AUTOMOTIVE RES & TESTING CENT
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