Coupled Resonator Wireless Charging for Wider Omnidirectional Range
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Solution Overview
Problem
Existing wireless charging technologies, particularly magnetic resonance methods, face limitations in effective charging distance and alignment requirements, restricting the convenience and flexibility of charging multiple devices.
Innovation Solution
A wireless power transmission device comprising a first resonator and a second resonator, where the second resonator is coupled to the first resonator, allowing for extended charging area and omnidirectional charging by forming a wider magnetic field when both resonators operate at the same resonant frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If electromagnetic induction method is used for wireless charging, then energy transmission efficiency is improved, but charging distance is limited and alignment requirements increase
Solution Approach 1:
The patent combines electromagnetic induction and magnetic resonance methods into a single wireless charging device. The device includes both an induction coil and a resonance coil, allowing it to switch between or combine both methods depending on charging conditions, thereby achieving both high efficiency and extended charging distance
Solution Approach 2:
The patent implements dynamic switching between electromagnetic induction and magnetic resonance methods based on real-time charging conditions. The control unit adjusts the operating mode according to device position, power requirements, and alignment status, optimizing both efficiency and charging distance adaptively
2Loss of energy
If electromagnetic induction method is used for wireless charging, then energy transmission efficiency is improved, but alignment requirements increase
Solution Approach 1:
The patent merges electromagnetic induction and magnetic resonance methods to provide charging flexibility. When alignment is poor, the system can switch to magnetic resonance which is more tolerant of misalignment, maintaining ease of operation while preserving energy efficiency through appropriate method selection
Solution Approach 2:
The patent changes operating parameters dynamically by switching between induction and resonance modes. When alignment requirements become problematic, the system adjusts by transitioning to magnetic resonance operation which operates effectively over a wider positional tolerance range
3Device complexity
If single resonator is used for wireless charging, then device complexity is reduced, but charging area is limited
Solution Approach 1:
The patent divides the charging system into multiple independent resonators, each capable of generating its own magnetic field. This segmentation allows each resonator to cover a specific zone, and when combined, they provide comprehensive omnidirectional charging coverage without requiring a single complex large-scale resonator
Solution Approach 2:
The patent arranges multiple resonators in three-dimensional space around the charging area, creating overlapping magnetic field zones. This spatial distribution in multiple dimensions extends the effective charging area while keeping individual resonator complexity manageable
4Area of stationary object
If multiple resonators are used for wireless charging, then charging area is extended, but device complexity increases
Solution Approach 1:
The patent designs each resonator to be multi-functional, capable of operating independently or in combination with others. The control unit intelligently manages which resonators are active based on device detection and position, allowing the system to provide extended charging area coverage while maintaining manageable complexity through selective activation
Solution Approach 2:
The patent implements a hierarchical control structure where multiple resonators are managed through a central control unit that coordinates their operation. The control system nests the management of individual resonators within an overall charging management framework, simplifying the complexity of managing multiple resonators through unified control
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
Enables efficient wireless charging of multiple devices regardless of their location and orientation, providing a longer effective charging distance and improved charging convenience compared to existing technologies.
Implementation Method 1
power is transmitted by utilizing a magnetic induction phenomenon between a primary coil and a secondary coil. When an AC current flows through the primary coil, a time-varying magnetic field is generated around the primary coil and generates an induced electromotive force in the secondary coil of a receiving end, thereby transmitting power
Implementation Method 2
a magnetic resonance method relying on the phenomenon of forming a magnetic field that vibrates at a specific resonant frequency in a transmitter coil and concentrating energy on a receiver coil that vibrates at the same resonant frequency
Data Source
AI summary
A wireless power transmission device may include: a first resonator including a first housing and a first coil inside the first housing, the first resonator being configured to wireless transmit power to an electronic device via magnetic resonance; and a second resonator including a second housing around at least a portion of the first housing, and a second coil inside the second housing, the second resonator being configured to wireless transmit power to the electronic device via the magnetic resonance, in a state in which the second resonator is coupled to the first resonator.