Antenna for wireless power transmission and manufacturing method of antenna
A wireless power transmission and antenna technology, which is applied in the field of manufacturing the antenna and the antenna for wireless power transmission, can solve the problems of insufficient utilization of conductors, reduced quality factor Q, and inability to achieve wireless power transmission performance.
Pending Publication Date: 2019-10-18
VALEO COMFORT & DRIVING ASSISTANCE
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Problems solved by technology
However, due to the significant skin effect and proximity effect at high frequencies, the current in the wire will be concentrated on the surface of the wire, especially in the surface area where adjacent turns of the wires face each other, and the conductor will not be fully utilized at this time. , so that the internal resistance R of the coil increases significantly, and the quality factor Q decreases, so that satisfactory wireless power transmission performance cannot be achieved
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[0033] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement them. However, the present invention can also be embodied in many different forms and is not limited to the embodiments described herein. For clarity, parts irrelevant to describing the present invention are omitted. Unless otherwise specified, terms used herein have their ordinary meanings in the art. Herein, the terms "left", "right", "upper" and "lower" are used to describe the relative positions of various components in the drawings. The use of these and similar terms is for convenience of description only and should not be construed as limiting the scope of the invention.
[0034] In the present invention, flat wires are used to wind the induction coil to obtain good quality factor and economy at the same time. Such coils can be used in radio transmit or receive antennas of wireless pow...
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The invention provides an antenna for wireless power transmission and a manufacturing method of the antenna. The antenna comprises a coil which is formed by winding flat wires on a coil plane (P), wherein the heights (H) of the flat wires are greater than the widths (W) of the flat wires. In the coil, the direction of the heights (H) of the flat wires is perpendicular to the coil plane (P). In theantenna, the direction of an induced magnetic field is almost perpendicular to the coil plane (P), the flat wires are in an elongated shape along the direction of the magnetic field and the irradiation area of the flat wires exposed to the magnetic field is relatively small, so that the influence of a proximity effect on the antenna under a high-frequency operating condition is relatively small,thereby having a relatively high quality factor and achieving relatively high transmission efficiency. Furthermore, the sectional area of the flat wires is relatively large and the internal resistanceis relatively low, so that achievement of relatively high transmission power and low-cost manufacturing is facilitated.
Description
technical field [0001] The invention relates to the technical field of wireless power transmission. In particular, the present invention relates to an antenna for wireless power transmission, and a method for manufacturing the antenna. Background technique [0002] Different from traditional wired transmission methods, wireless power transfer (WPT) uses radio to realize non-contact power transmission. Wireless power transmission equipment has the advantages of compact structure, convenient operation, and high environmental tolerance, and is widely used in mobile electronic device charging, power supply in highly polluted environments, and other fields. However, the power and transmission efficiency of wireless power transmission need to be improved urgently. Whether it is short-distance transmission based on electromagnetic induction or medium-distance transmission based on electromagnetic resonance coupling, an antenna in the form of an inductive coil is necessary, which ...
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IPC IPC(8): H01Q7/06H01Q1/36H02J50/23H02J50/27
CPCH01Q7/06H01Q1/36H02J50/23H02J50/27
Inventor 姚斌
Owner VALEO COMFORT & DRIVING ASSISTANCE