Inductive Charging Module With Core-Channel Antenna Shielding
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Solution Overview
Problem
Contactless inductive charging systems for vehicles face disruptions in communication due to electromagnetic fields generated during energy transfer, affecting the precision and efficiency of energy transfer and vehicle positioning.
Innovation Solution
A module with a magnetic core having a central hole or through channel for the communication device's antenna, which uses a WLAN protocol and is shielded to minimize electromagnetic interference, ensuring reliable communication during energy transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a magnetic core is used to improve inductive energy transfer efficiency, then energy transfer efficiency is improved, but electromagnetic interference with communication signals worsens
Solution Approach 1:
The magnetic core is segmented by introducing a through-channel that divides the core into separate regions. This segmentation allows the communication antenna to be positioned within the core structure while creating a dedicated communication pathway that separates communication signals from the electromagnetic fields generated during energy transfer, thereby reducing interference while maintaining efficient energy transfer.
Solution Approach 2:
The communication antenna is nested within the magnetic core structure, with the antenna positioned inside the through-channel of the core. This nesting arrangement allows the communication device to be integrated into the energy transfer module while the magnetic core provides shielding and structural support, enabling both functions to coexist with minimal interference.
2Volume of moving object
If the communication antenna is positioned close to the coil for compact design, then device compactness is improved, but communication reliability worsens due to electromagnetic interference
Solution Approach 1:
The communication antenna is nested within the magnetic core's through-channel, positioning it close to the coil for compactness while the magnetic core material provides inherent electromagnetic shielding. This nested arrangement maintains a compact module volume while the magnetic core protects the antenna from harmful electromagnetic interference, ensuring communication reliability.
Solution Approach 2:
The magnetic core acts as an intermediary structure between the coil and the communication antenna. It provides a physical and electromagnetic barrier that shields the antenna from the strong electromagnetic fields generated by the coil, enabling reliable communication even when the antenna is positioned close to the coil for compact design.
3Reliability
If shielding is added to protect the communication device, then communication reliability is improved, but device complexity worsens
Solution Approach 1:
The magnetic core serves multiple functions simultaneously: it enables efficient inductive energy transfer, provides structural support for the module, and acts as electromagnetic shielding for the communication antenna. By making the magnetic core multi-functional, additional dedicated shielding components are eliminated, maintaining communication reliability while avoiding increased device complexity.
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 configuration enables improved and disruption-free communication between modules, enhancing the positioning and control of inductive energy transfer, resulting in more efficient and reliable energy transfer to vehicle-mounted energy stores.
Implementation Method 1
A first coil (primary coil) generates a magnetic field in a first module (Ground Pad Module, GPM), which magnetic field induces current in a second coil (secondary coil) of an adjacent second module (Car Pad Module, CPM)
Implementation Method 2
The magnetic core has a hole that forms a communication channel for the communication device
Data Source
AI summary
A module for contactless inductive energy transfer, including a coil that includes a magnetic core to emit or receive electrical energy using inductive coupling, wherein the magnetic core includes a hole that forms a communication channel, and a wireless communication device that includes an antenna, the antenna installed in a region of the hole and configured to transmit and receive signals via the communication channel, wherein an opposite pole of the antenna is designed as a shield that is configured to shield electronics from a magnetic file generated by the electrical energy emitted or received by the coil via the inductive coupling.