Figure-Eight Inductor Coil Layout for Directed Wireless Power Transfer
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Solution Overview
Problem
Existing wireless energy transmission methods using near-field magnetic coupling are inefficient due to magnetic fields radiating in multiple directions, leading to reduced transmission efficiency and interference with metallic objects, and they do not allow for simultaneous charging of multiple devices in various orientations.
Innovation Solution
The use of inductor coils with a figure-eight configuration that focus magnetic fields in a uniform direction towards the receiving antenna, minimizing interference with surrounding metallic objects and enhancing coupling efficiency, along with magnetic field shielding to control the direction and intensity of magnetic fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional single-loop inductor coils are used, then the structure is simple, but the magnetic field radiates in multiple directions causing reduced transmission efficiency
Solution Approach 1:
The inductor coil is divided into multiple loops (first loop and second loop) arranged in a specific configuration. Each loop contributes to shaping the overall magnetic field distribution, with the segmentation allowing the field to be directed more efficiently toward the receiving antenna rather than radiating uniformly in all directions.
Solution Approach 2:
Different regions of the inductor coil structure are designed to produce different magnetic field characteristics. The first and second loops create localized magnetic field zones that combine to form a directed field pattern, with specific areas optimized for field concentration in the desired transmission direction.
2Object-affected harmful factors
If traditional inductor coils are used, then the structure is compact, but magnetic fields interfere with surrounding metallic objects
Solution Approach 1:
The inductor coil design creates localized magnetic field regions through its multi-loop structure, concentrating the field where needed while minimizing spread to surrounding areas. This local field control reduces interference with metallic objects in the vicinity by preventing omnidirectional radiation.
Solution Approach 2:
The patent transforms the potentially harmful omnidirectional radiation into a beneficial directed field pattern. By configuring the loops to produce constructive interference in the desired direction and destructive interference in other directions, the design converts what would be harmful scattered radiation into useful focused energy transmission.
3Adaptability or versatility
If traditional inductor coils are used, then the system is simple, but multiple devices cannot be charged simultaneously in various orientations
Solution Approach 1:
The multi-loop inductor structure segments the magnetic field into distinct regions, each capable of coupling with receiving antennas in different orientations. This segmentation allows multiple devices to be charged simultaneously by directing field energy to different spatial zones created by the various loops.
Solution Approach 2:
The inductor coil structure performs multiple functions simultaneously: it generates directed magnetic fields for primary transmission, creates multiple field regions for multi-device charging, and maintains compact form factor. This multi-functionality enables versatile charging capabilities without proportionally increasing complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration increases the efficiency and magnitude of wireless electrical energy transmission, allowing simultaneous charging of multiple devices in various orientations while minimizing interference and improving coupling between antennas.
Implementation Method 1
Near field magnetic coupling (NFMC) is a commonly employed technique to wirelessly transfer electrical energy. In NEMC an oscillating magnetic field generated by a transmitting antenna passes through a receiving antenna that is spaced from the transmitting antenna, thereby creating an alternating electrical current that is received by the receiving antenna.
Implementation Method 2
Such an inductor coil configuration improves the efficiency of wireless electrical energy transmission by focusing the radiating magnetic field in a uniform direction, towards the receiving antenna.
Implementation Method 3
at least one of the wireless electrical power transmitting and receiving antennas is configured with one or more magnetic field shielding embodiments that increase the quantity of the magnetic field within a given volume of space, i.e., density of the magnetic field that emanates from the antenna.
Data Source
AI summary
Various embodiments of inductor coils, antennas, and transmission bases configured for wireless electrical energy transmission are provided. These embodiments are configured to wirelessly transmit or receive electrical energy or data via near field magnetic coupling. The embodiments of inductor coils comprise a figure eight configuration that improve efficiency of wireless transmission efficiency. The embodiments of the transmission base are configured with at least one transmitting antenna and a transmitting electrical circuit positioned within the transmission base. The transmission base is configured so that at least one electronic device can be wirelessly electrically charged or powered by positioning the at least one device in contact with or adjacent to the transmission base.