Figure-Eight Inductor Coil Layout for Efficient Wireless Power Transfer
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Solution Overview
Problem
Existing wireless transmission technologies using near-field magnetic coupling (NFMC) face inefficiencies due to radiated magnetic fields not being focused directly towards the receiving antenna, especially in metallic environments, and are limited in charging multiple devices simultaneously regardless of their orientation.
Innovation Solution
The use of inductor coils with a figure-eight configuration that focuses magnetic fields in a uniform direction, minimizing interference with the surrounding environment and allowing for efficient transmission of electrical energy and data between antennas, along with magnetic field shielding to enhance transmission efficiency and orientation independence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional transmitting antennas are used, then wireless energy transmission is achieved, but transmission efficiency is reduced due to magnetic fields radiating in multiple directions away from the receiving antenna
Solution Approach 1:
The transmitting antenna is divided into multiple coil segments arranged in a specific geometric pattern (e.g., two orthogonal coils or multiple planar coils). Each coil segment generates a magnetic field component that collectively focuses the net magnetic flux in a uniform direction toward the receiving antenna, reducing omnidirectional radiation losses.
Solution Approach 2:
The patent applies magnetic field shielding materials (such as ferrite or mu-metal) in specific locations around the transmitting antenna to control magnetic field distribution. This local modification of field properties directs magnetic flux toward the receiving antenna while blocking radiation in unwanted directions, thereby improving transmission efficiency.
2Reliability
If conventional transmitting antennas are used, then wireless energy transmission is achieved, but transmission is limited in metallic environments due to interference
Solution Approach 1:
Magnetic field shielding materials are strategically positioned between the transmitting antenna and metallic objects to create localized field control zones. This prevents harmful eddy currents and magnetic coupling with metallic structures, maintaining transmission reliability in metallic environments.
Solution Approach 2:
The patent introduces magnetic shielding materials as intermediary elements that mediate the interaction between the transmitting antenna's magnetic field and surrounding metallic objects. These materials act as a buffer, redirecting magnetic flux away from metallic surfaces and preventing interference while allowing energy transmission to proceed.
3Adaptability or versatility
If conventional transmitting antennas are used, then wireless charging is achieved, but multiple devices cannot be charged simultaneously regardless of orientation
Solution Approach 1:
The transmitting antenna system is segmented into multiple independent or coupled coil units arranged in three-dimensional space. Each coil unit can independently or collectively contribute to charging devices in different orientations, enabling simultaneous multi-device charging regardless of how devices are positioned on the charging surface.
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 significantly increases the efficiency and magnitude of wireless electrical energy transmission, enabling simultaneous charging of multiple devices in various orientations without significant interference from metallic objects.
Implementation Method 1
In NFMC 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
the figure eight coil configuration minimizes coupling of magnetic fields with the surrounding environment thereby improving the magnitude and efficiency of wireless electrical energy transmission
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.