Wireless Charging Coil Arrangement for Multi-Directional Power Transfer
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Solution Overview
Problem
Current wireless charging systems face inefficiencies in power transfer due to the fixed orientation and limited directional capabilities of transmitter coils, which can result in reduced power delivery to receivers positioned at varying angles or distances.
Innovation Solution
A wireless charging system employing multiple concentric coils arranged in non-parallel planes, with a driver circuit that dynamically adjusts the activation of coils to generate a multi-directional or omni-directional magnetic field, allowing for efficient power transfer to receivers regardless of their orientation or position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed orientation transmitter coil is used, then the device structure is simple, but the power transfer efficiency decreases when receiver is positioned at varying angles or distances
Solution Approach 1:
The transmitter is divided into multiple independent coils (first coil, second coil, third coil) arranged in different planes. Each coil can be independently controlled to generate magnetic fields in specific directions, allowing the system to segment the power transmission function across multiple directional components rather than relying on a single fixed coil.
Solution Approach 2:
The driver circuit dynamically selects and activates specific coils based on the receiver's position and orientation. This dynamic control allows the magnetic field direction to adapt in real-time to the receiver's location, maintaining optimal power transfer efficiency regardless of the receiver's varying angles or distances from the transmitter.
2Loss of energy
If multiple coils in different planes are used, then the power transfer efficiency is improved for various receiver positions, but the device complexity increases
Solution Approach 1:
The multiple coils are designed to work together as a unified multi-directional power transmission system. Each coil serves multiple purposes: individual coils can transmit power independently, and they can also work in combination to provide omnidirectional coverage. This multi-functionality allows the increased hardware complexity to be justified by the enhanced versatility and efficiency across various receiver positions.
Solution Approach 2:
The driver circuit automatically detects the receiver's position and orientation, then autonomously selects the optimal coil configuration without requiring manual intervention. The system self-adjusts the magnetic field direction and intensity by activating appropriate coils, making the complexity management automatic and transparent to the user.
3Adaptability or versatility
If dynamic coil activation is implemented, then the adaptability to receiver position is improved, but the control system complexity increases
Solution Approach 1:
The driver circuit incorporates feedback mechanisms that continuously monitor the receiver's position and orientation. Based on this feedback information, the control system dynamically adjusts which coils are activated and at what power levels. This feedback loop enables the system to adapt to changing receiver positions while maintaining manageable control complexity through automated decision-making algorithms.
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 enhances power transfer efficiency by dynamically adjusting coil activation based on receiver position and orientation, ensuring consistent and optimized power delivery across multiple directions, thereby improving the overall charging performance.
Implementation Method 1
a transmitter driver circuit configured to provide a time-varying current signal to one or more of the first coil, the second coil or the third coil
Data Source
AI summary
A wireless charging system including a first coil configured to be coupled to a transmitter driver circuit and arranged in a first plane, a second coil configured to be coupled to the transmitter driver circuit and arranged in a second plane and a third coil configured to be coupled to the transmitter driver circuit and arranged in a third plane. The transmitter driver circuit is configured to provide a time-varying current signal to one or more of the first coil, the second coil or the third coil. The first coil, the second coil and the third coil are concentric, the first plane is not parallel to the second plane and the third plane, and the second plane is not parallel to the third plane.