Wireless Charging Coil Capacitance Adjustment for Interference Reduction
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Solution Overview
Problem
Existing wireless charging devices generate electromagnetic interference that affects other electronic devices, and there is a need to reduce this interference while maintaining operational performance.
Innovation Solution
A wireless system comprising a first coil and a second coil, with a capacitance adjusting unit connected to the first coil, which includes a closed loop and a connecting wire to adjust capacitance between layers, reducing electromagnetic interference without altering the inductance or impedance of the coil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a wireless charging device uses a coil to generate electromagnetic waves for charging, then wireless charging performance is improved, but electromagnetic interference to other electronic devices increases
Solution Approach 1:
The patent introduces a closed loop structure that utilizes the electromagnetic waves generated by the coil. Instead of allowing these waves to cause interference, the closed loop captures and converts them into useful electrical energy through electromagnetic induction, thereby transforming the harmful electromagnetic interference into beneficial power for charging small electronic devices.
Solution Approach 2:
The closed loop acts as an intermediary element between the coil and the environment. It intercepts electromagnetic waves that would otherwise cause interference and redirects their energy through electromagnetic induction to charge devices, serving as a mediator that converts potential harm into useful function.
2Productivity
If the coil generates strong electromagnetic waves for efficient charging, then charging speed is improved, but interference to surrounding devices increases
Solution Approach 1:
The closed loop structure captures the strong electromagnetic waves generated during fast charging and converts them into electrical energy through electromagnetic induction. This allows the system to maintain high charging speed while preventing the excess electromagnetic energy from causing interference to surrounding devices.
3Power
If a magnetic conductive plate is used to concentrate magnetic lines of force, then wireless charging efficiency is improved, but electromagnetic interference to other devices increases
Solution Approach 1:
While the magnetic conductive plate concentrates magnetic lines of force to improve charging efficiency, the closed loop simultaneously captures the resulting electromagnetic waves and converts them into useful energy. This combination maintains high efficiency while preventing the concentrated electromagnetic energy from causing interference.
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
The capacitance adjusting unit effectively minimizes electromagnetic interference from the wireless charging device without affecting its performance, allowing for efficient charging while protecting nearby electronic devices.
Implementation Method 1
the second coil is configured to sense the first coil to generate electric power
Implementation Method 2
a capacitance adjusting unit configured to be electrically connected to the first coil to change the capacitance value between layers of the first coil
Data Source
AI summary
A wireless system is provided and includes a first coil, a second coil, and a capacitance adjusting unit. The second coil is configured to sense the first coil. The capacitance adjusting unit is connected to the first coil, the capacitance adjusting unit includes at least one closed loop and a connecting wire, and the connecting wire is connected between the first coil and the closed loop.