Rotatable Receive Coil Wireless Charging System
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Portable electronic devices with limited surface area face challenges in wireless charging due to space constraints and the complexity of charging systems for multiple devices, as traditional wired charging methods are inefficient and difficult to configure.
Innovation Solution
The integration of additional rotatable secondary receive coils coupled to a primary stationary coil, allowing for increased magnetic flux capture and orientation-independent charging without the need for multiple transmit coils or complex sensing electronics, using magnetic resonance coupling and a rotatable clip or blade configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If additional rotatable secondary receive coils are integrated to increase magnetic flux capture, then charging efficiency and output power are enhanced, but device complexity and space requirements increase
Solution Approach 1:
The patent implements rotatable secondary receive coils that can dynamically adjust their orientation and position relative to the primary stationary coil. This dynamic configuration allows the coils to optimize their magnetic flux capture based on charging conditions, thereby enhancing charging efficiency without permanently increasing device complexity. The rotatable mechanism enables adaptive adjustment rather than fixed complex structure.
Solution Approach 2:
The charging system is divided into distinct segments: a primary stationary receive coil and multiple secondary rotatable receive coils. This segmentation allows each coil to perform specific functions independently, with the secondary coils providing additional magnetic flux capture capability when needed, while the primary coil handles baseline charging operations, thus managing overall system complexity through functional division.
2Power
If additional rotatable secondary receive coils are integrated to increase magnetic flux capture, then output power is enhanced, but device surface area requirements increase
Solution Approach 1:
Instead of expanding the device surface area horizontally to accommodate additional coils, the patent utilizes the vertical dimension and rotational degree of freedom. The secondary receive coils are positioned to rotate into optimal positions during charging, effectively using three-dimensional space rather than consuming additional two-dimensional surface area on the device body.
Solution Approach 2:
The rotatable secondary coils provide dynamic power enhancement only when needed during charging operations, rather than requiring all coils to be permanently deployed and occupying surface area at all times. This on-demand activation allows high output power capability without permanent surface area commitment.
3Ease of operation
If orientation-independent charging is achieved through rotatable coils, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The rotatable secondary receive coils are designed to automatically adjust their orientation to optimal positions for magnetic flux capture, eliminating the need for user intervention or complex control systems. The mechanism serves itself by utilizing magnetic field interactions to achieve proper alignment, thereby improving ease of operation without proportionally increasing control 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 approach enhances charging efficiency and output power, enabling effective wireless charging of portable devices with limited surface area, achieving higher power transfer and reduced complexity in charging systems, as demonstrated by measured results showing improved efficiency and power output with dual receive coils.
Implementation Method 1
The primary stationary receive coil may be coupled to or integrated within a substrate, such as a printed circuit board (not shown) within the appended housing 102. The secondary rotatable receive coil 110 may be coupled to or integrated within a substrate, such as a printed circuit board (not shown) within the clip 104. The coupled coils provide a larger coupling area with which to obtain higher efficiency and output power.
Implementation Method 2
The apparatus is formed of a primary stationary receive coil located at the portable device housing and additional secondary receive coils rotatably coupled to the housing, via a clip or a plurality of rotatable blades. The additional rotatable coils are electronically coupled (in parallel or series) to the stationary primary receive coil. The coupled coils provide a larger coupling area with which to obtain higher efficiency and output power.
Data Source
AI summary
An apparatus, device, and charging system are provided. The apparatus comprises a primary stationary receive coil and a secondary rotatable receive coil, the primary stationary receive coil being electronically coupled to the secondary rotatable receive coil. The secondary rotatable receive coil provides a charge mode position when rotated in a same plane as the primary stationary receive coil. The secondary rotatable receive coil provides non-charge mode position when retracted back against the primary stationary receive coil. The coils may be coupled is series and or parallel configurations. The primary stationary receive coil may be integrated within or appended to a housing. The secondary rotatable receive coil may be integrated within or coupled to a rotatable clip coupled to the housing. Rotation of the clip extends a charging configuration with which to charge the primary stationary receive coil and the secondary rotatable receive coil.