3D Transmission Coil Array for Orientation-Stable Wireless Charging
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Solution Overview
Problem
Conventional wireless power transmission devices experience reduced power transfer efficiency when the wireless power reception device is positioned or oriented differently, leading to inconsistent charging performance.
Innovation Solution
The use of multiple transmission coil units with antennas having three-dimensional planes allows for the generation of a magnetic field that maintains constant power transfer efficiency regardless of the reception device's position or direction, ensuring consistent charging by adjusting the magnetic flux distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single transmission coil is used, then the device structure is simple, but power transfer efficiency varies significantly with reception device position and orientation
Solution Approach 1:
The single transmission coil is divided into multiple transmission coils arranged in an array. Each coil can be independently controlled to generate magnetic fields in different directions, allowing the system to adapt to various reception device orientations and positions, thereby maintaining stable power transfer efficiency.
Solution Approach 2:
The system dynamically selects and activates specific transmission coils based on the detected position and orientation of the reception device. This dynamic adaptation ensures that the magnetic field is always optimally aligned with the reception coil, maintaining high power transfer efficiency regardless of device placement.
2Reliability
If multiple transmission coils are arranged to cover all positions, then power transfer efficiency is maintained, but device complexity increases
Solution Approach 1:
Instead of activating all transmission coils simultaneously, the system selectively activates only the necessary subset of coils based on the reception device's position and orientation. This partial action approach maintains power transfer efficiency while reducing the effective complexity by not requiring all coils to operate at once.
Solution Approach 2:
The system incorporates detection mechanisms that monitor the reception device's position and orientation, providing feedback to the control unit. This feedback enables the system to dynamically adjust which transmission coils are activated, optimizing power transfer while managing system complexity through intelligent control.
3Ease of manufacture
If transmission coils are fixed in a matrix arrangement, then manufacturing is simple, but adaptability to different reception device orientations is poor
Solution Approach 1:
Different transmission coils in the matrix are assigned different functional characteristics and activation patterns based on their specific positions and orientations. Each coil is optimized for specific reception device orientations, allowing the overall system to handle various device placements while maintaining manufacturing simplicity through standardized coil designs.
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 solution ensures maximum power transfer efficiency and charging consistency even when the wireless power reception device is inclined or oriented at various angles, expanding the freedom of movement and positioning without reducing charging efficiency.
Implementation Method 1
Wireless power transmission or wireless energy transfer technology is a technology for wirelessly transmitting electrical energy from a transmitter to a receiver using the principle of induction of a magnetic field
Implementation Method 2
when the plane of the reception coil 22 of the wireless power reception device 20 faces the plane of the third transmission coil 12c among the plurality of transmission coils 12a to 12d, a magnetic field generated by the transmission coil 12c is subjected to flux linkage with the reception coil 22 to induce a current in the reception coil 22 and convert the current into a voltage to obtain reception power
Data Source
AI summary
A wireless power transmission device can include a plurality of transmission coil units, in which each of the plurality of transmission coil units includes a plurality of antenna coils arranged on different three-dimensional planes, and the plurality of antenna coils are configured to generate a magnetic field passing through at least one or more of the different three-dimensional planes to transfer transmission power to a wireless power reception device.