Movable Wireless Power Transmitter Unit With Linear Motor
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Solution Overview
Problem
Existing wireless charging systems face challenges in achieving efficient power transfer due to the need for precise positioning of receiver devices, which limits user convenience and increases costs when using multiple transmitter coils or complex servomechanisms.
Innovation Solution
A wireless power transmitter module with a sensing grid and a two-dimensional linear motor that moves a movable wireless power transmitter unit in a two-dimensional plane to align with the receiver device, allowing for flexible positioning and efficient power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single non-movable transmitter coil is used, then system cost and complexity are reduced, but receiver positioning precision requirements increase and user convenience decreases
Solution Approach 1:
The patent implements a movable transmitter coil assembly that can dynamically adjust its position within the transmitter surface. The coil assembly is mounted on a movable platform with actuators that enable it to translate and reposition itself, transforming the static transmitter design into a dynamic one that actively adapts to receiver location.
Solution Approach 2:
The patent replaces complex mechanical servomechanisms with a simplified linear actuator system. The linear actuators directly drive the movable coil assembly without requiring rotary-to-linear conversion mechanisms, reducing mechanical complexity while maintaining positioning capability.
2Ease of operation
If multiple overlapped transmitter coils are used, then receiver positioning freedom increases, but system cost and heat generation increase
Solution Approach 1:
The patent divides the transmitter into multiple independent coil assemblies, each capable of being independently positioned and controlled. These segmented coils can be selectively activated based on receiver location, allowing the system to provide positioning freedom while activating only the necessary coils to minimize heat generation.
Solution Approach 2:
The movable coil assembly periodically scans or adjusts its position to locate the receiver, then settles into a stable positioning mode for continuous power transfer. This periodic adjustment followed by stable operation reduces unnecessary coil switching and minimizes heat generation while maintaining positioning freedom.
3Adaptability or versatility
If servomechanisms with rotating servomotors are used to move transmitter coils, then positioning flexibility improves, but device complexity and reliability worsen
Solution Approach 1:
The patent replaces complex rotary servomotors with linear actuators that directly produce linear motion. This substitution eliminates the need for rotary-to-linear conversion mechanisms, reducing mechanical complexity while maintaining positioning flexibility. The linear actuators provide direct drive capability with fewer moving parts.
Solution Approach 2:
The patent extracts and removes the complex rotary conversion mechanisms from the servomechanism system, retaining only the essential linear positioning function. By taking out the unnecessary rotary components, the system achieves positioning flexibility with reduced complexity and improved reliability.
4Adaptability or versatility
If servomechanisms with rotating servomotors are used to move transmitter coils, then positioning flexibility improves, but system reliability decreases
Solution Approach 1:
The patent replaces complex rotary servomotors with linear actuators that have fewer moving parts and no rotary-to-linear conversion mechanisms. This substitution reduces the number of potential failure points while maintaining positioning flexibility, thereby improving system reliability.
Solution Approach 2:
The linear actuator system is designed to be self-contained with integrated positioning control, reducing dependency on external complex control mechanisms. The system can autonomously adjust and maintain optimal coil positioning without requiring complex servomechanistic interventions, improving reliability.
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 enables flexible positioning of receiver devices while maintaining efficient power transfer, reducing costs and complexity compared to traditional systems, and enhancing user convenience by eliminating the need for precise alignment.
Implementation Method 1
a two-dimensional linear motor including a plurality of linear motor coils configured to move the movable wireless power transmitter unit in a two-dimensional plane towards a location of the receiver
Implementation Method 2
a movable wireless power transmitter unit including a wireless power transmitter coil
Data Source
AI summary
In an embodiment, a wireless power transmitter module includes a sensing grid configured to detect a receiver, a movable wireless power transmitter unit including a wireless power transmitter coil, and a two-dimensional linear motor including a plurality of linear motor coils configured to move the movable wireless power transmitter unit in a two-dimensional plane towards a location of the receiver.