Multi-Coil Wireless Power Transfer System for Misalignment
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Solution Overview
Problem
Existing wireless power transfer systems face inefficiencies due to misalignment of transmitter and receiver coils, which can compromise the alignment of magnetic flux vectors, leading to suboptimal power transfer in applications where physical coaxial alignment is impractical.
Innovation Solution
A multi-coil wireless charging system that includes a first transmitting coil in the lower portion and a second transmitting coil in the side portion of a wireless charger, with a communications module to determine the orientation of the receiving coil and adjust currents to both coils to synthesize a resultant flux vector aligned with the target flux vector of the receiving coil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a single transmitting coil is used in traditional wireless charging, then the system structure is simple, but power transfer efficiency deteriorates when coils are misaligned
Solution Approach 1:
The transmitting coil is divided into multiple independent coil segments (first transmitting coil, second transmitting coil, etc.) arranged in different spatial positions. Each segment can independently generate magnetic flux, and their combined effect creates a resultant flux vector that can be oriented to match the receiving coil's orientation, thereby maintaining high power transfer efficiency despite misalignment between the overall transmitter and receiver units.
2Loss of energy
If physical coaxial alignment between transmitting and receiving coils is required, then power transfer efficiency is maximized, but ease of operation deteriorates due to alignment requirements
Solution Approach 1:
The system dynamically adjusts the current distribution among multiple transmitting coil segments based on the detected orientation of the receiving coil. By controlling the magnitude and phase of current in each segment, the system dynamically synthesizes a resultant flux vector that adapts to match the receiving coil's orientation, eliminating the need for fixed physical coaxial alignment while maintaining high efficiency.
Solution Approach 2:
The system employs feedback mechanisms where the orientation of the receiving coil is detected (through communication between transmitter and receiver), and this information is used to adjust the current distribution in the transmitting coil segments. This closed-loop control ensures that the resultant flux vector continuously aligns with the target flux vector, maintaining optimal power transfer efficiency without requiring manual alignment.
3Adaptability or versatility
If multiple transmitting coils are added to accommodate different orientations, then adaptability improves, but device complexity increases
Solution Approach 1:
The transmitting coil is divided into multiple independent coil segments (first transmitting coil, second transmitting coil, etc.) arranged in different spatial positions. Each segment can independently generate magnetic flux, and their combined effect creates a resultant flux vector that can be oriented to match the receiving coil's orientation, thereby maintaining high power transfer efficiency despite misalignment between the overall transmitter and receiver units.
Solution Approach 2:
The multi-segment coil structure serves multiple functions: each segment can be independently controlled to adapt to different receiving coil orientations, the system can handle both aligned and misaligned scenarios, and it maintains efficiency across various operational conditions. This universal design eliminates the need for different charging solutions for different orientations.
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 the efficiency of wireless power transfer by aligning the resultant flux vector with the target flux vector, improving charging efficiency without the need for physical coil alignment, allowing for simpler and more efficient charging of information handling systems.
Implementation Method 1
A wireless power transfer system typically includes a wireless charging pad on to which a device may be placed for charging. The wireless power transfer system can then wirelessly transmit power to the device.
Implementation Method 2
This approach enhances the efficiency of wireless power transfer by aligning the resultant flux vector with the target flux vector, improving charging efficiency without the need for physical coil alignment
Data Source
AI summary
Systems and methods are disclosed for multi-coil wireless power transfer. The system includes a first transmitting coil disposed within a lower portion of a wireless charger, and a second transmitting coil disposed within a side portion of the wireless charger. The system further includes a communications module configured to receive a signal from an information handling system. The information handling system includes a receiving coil. The system additionally includes a transmit module configured to determine an orientation of the receiving coil, and provide a first current to the first transmitting coil and a second current to the second transmitting coil based on the orientation of the receiving coil.