Magnetic Coupling Device With Shielding For Wireless Power And Signal Transmission
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Solution Overview
Problem
Existing wireless power transmission systems face challenges in minimizing the influence of magnetic flux for power transmission on signal transmission, as the magnetic flux generated during power transfer can interfere with signal coupling, leading to instability and inefficiency in both power and signal delivery.
Innovation Solution
A magnetic coupling device is designed with separate coil units for power and signal transmission, where electromagnetic shielding members are strategically placed to prevent magnetic coupling between power and signal coils, allowing for orthogonal alignment of magnetic fluxes and minimizing interference. This device includes a power transmitting coil, a power receiving coil, a signal transmitting coil, and a signal receiving coil, along with a power transmitting circuit, a control circuit, a power receiving circuit, and a signal generating circuit to manage and control the transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the power transmitting coil and signal transmitting coil are disposed in proximity to each other, then wireless power and signal transmission can be achieved, but the magnetic flux for power transmission interferes with signal transmission
Solution Approach 1:
The coil system is segmented into two independent units: a power transmitting coil unit and a signal transmitting coil unit. Each unit operates independently with its own magnetic coupling path, preventing interference between power and signal transmission. The power coil unit comprises a power transmitting coil and power receiving coil, while the signal coil unit comprises a signal transmitting coil and signal receiving coil, allowing simultaneous operation without mutual interference.
Solution Approach 2:
An electromagnetic shielding member is introduced as an intermediary element between the power coil unit and signal coil unit. This shielding member selectively blocks the magnetic flux from the power transmitting coil from reaching the signal receiving coil, while allowing the signal transmission path to remain intact. The shielding member acts as a mediator that separates the two magnetic fields spatially.
2Ease of operation
If magnetic field coupling is used for signal transmission, then control signals can be transmitted wirelessly, but the magnetic flux for power transmission affects the control signal transmission
Solution Approach 1:
The magnetic coupling system is segmented into separate power transmission path and signal transmission path. The signal transmitting coil and signal receiving coil form an independent magnetic coupling channel that is spatially separated from the power transmission coils. This segmentation ensures that control signals can be transmitted wirelessly without being affected by the power transmission magnetic flux.
Solution Approach 2:
The electromagnetic shielding member serves as an intermediary that protects the signal transmission path from the power transmission magnetic flux. By positioning the shielding member between the power transmitting coil and signal receiving coil, it blocks the harmful magnetic flux while allowing the signal magnetic flux to pass through, thereby preserving control signal accuracy.
3Power
If the power transmitting coil generates strong magnetic flux for power transmission, then power can be transmitted wirelessly, but the magnetic flux interferes with the signal receiving coil
Solution Approach 1:
An electromagnetic shielding member is positioned between the power transmitting coil and the signal receiving coil to block the harmful magnetic flux. The shielding member allows the power transmission function to operate at full power while simultaneously protecting the signal receiving coil from magnetic flux interference. The shielding member acts as a selective barrier that blocks power flux from reaching the signal coil.
Solution Approach 2:
The harmful magnetic flux effect is extracted and isolated from the signal transmission path by introducing the electromagnetic shielding member. The shielding member removes the interference component from the magnetic field environment, allowing the power transmitting coil to generate strong magnetic flux without affecting the signal receiving coil.
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 solution effectively reduces the impact of magnetic flux from power transmission on signal transmission, ensuring stable and efficient power delivery while maintaining high signal quality, by using electromagnetic shielding to isolate the magnetic fields and employing distinct frequency ranges for power and signal transmission.
Implementation Method 1
a current is made to flow in a power transmitting coil to generate a magnetic flux, which interlinks a power receiving coil to cause the power receiving coil to generate a voltage, thereby transmitting power
Implementation Method 2
at least one of the first and second coil units has an electromagnetic shielding member disposed at a position preventing magnetic coupling between the first and second coils
Data Source
AI summary
Disclosed herein is a magnetic coupling device that includes first and second coil units that transmit power or signals with each other by wireless. Each of the first and second coil units includes a first coil and a second coil. The first coil of the first coil unit and the first coil of the second coil unit are magnetically coupled to each other. The second coil of the first coil unit and the second coil of the second coil unit are magnetically coupled to each other. At least one of the first and second coil units has an electromagnetic shielding member disposed at a position preventing magnetic coupling between the first and second coils.