Vehicle Antenna Winding Sections for Inductive Energy and Data Transmission
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Solution Overview
Problem
Existing contactless energy transmission systems for vehicles face challenges in efficiently transmitting energy while minimizing interference from the alternating magnetic field, which can disrupt data transmission.
Innovation Solution
A system with a primary conductor winding and a secondary winding on the vehicle, featuring an antenna with multiple winding sections arranged to cancel out induced voltages, allowing for undisturbed data transmission through a homogeneous magnetic field, using ferrite material for shielding and capacitors to maintain efficiency across varying distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If an antenna is arranged in the area of the primary conductor winding to enable data transmission, then data transmission capability is improved, but the antenna is exposed to strong alternating magnetic fields that induce voltages and cause interference
Solution Approach 1:
The antenna is divided into multiple winding sections (at least two) with different wound areas, winding directions, and numbers of windings. Each section experiences different induced voltages from the alternating magnetic field, and when connected in series, these voltages sum to essentially zero, canceling out the magnetic field interference while allowing the antenna to remain in the high-field area for data transmission
Solution Approach 2:
The patent converts the harmful induced voltages from the alternating magnetic field into a beneficial cancellation effect. By carefully designing the winding sections with opposite winding directions and appropriate ratios of wound areas and turn numbers, the induced voltages from each section are made equal in magnitude but opposite in sign, causing them to cancel each other out. This transforms the previously harmful magnetic field interference into a neutral effect, enabling the antenna to operate in the optimal high-field region without degradation of data transmission quality
2Power
If the antenna is positioned centrally above the primary conductor winding for optimal coupling, then energy transmission efficiency is improved, but magnetic field interference with data transmission is maximized
Solution Approach 1:
The antenna is segmented into multiple winding sections with specifically designed characteristics (different wound areas, winding directions, and turn numbers) that enable the sections to be positioned centrally for optimal energy coupling while their combined voltage response to the magnetic field cancels out the interference
Solution Approach 2:
The patent changes the parameters of the antenna winding sections - specifically the wound areas, winding directions, and numbers of windings - to create a configuration where the sections are optimally positioned for energy transmission while their electromagnetic responses are tuned to cancel each other, simultaneously achieving both high power efficiency and low interference
3Device complexity
If a single winding section is used in the antenna, then the structure is simple, but it cannot cancel induced voltages and data transmission is disturbed by magnetic field interference
Solution Approach 1:
The antenna is divided into multiple winding sections (at least two) with different characteristics. When connected in series, these sections produce induced voltages that cancel each other in the alternating magnetic field, eliminating data transmission interference. The segmentation is designed to be as simple as possible while achieving the cancellation effect, balancing structural complexity with performance
Solution Approach 2:
The winding sections are designed with asymmetric characteristics - different wound areas, opposite winding directions, and potentially different numbers of windings. This asymmetric design enables the voltage cancellation effect, as the sections respond differently to the magnetic field but their responses are configured to sum to zero, improving data transmission quality without excessive 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
Enables efficient energy transmission to vehicles with minimal interference, allowing for reliable data exchange and stable operation even when the vehicle is positioned precisely above the primary conductor winding.
Implementation Method 1
a primary conductor winding for the inductive transmission of energy to a secondary winding arranged on the vehicle
Implementation Method 2
the sum of the voltages induced in the two winding sections by the alternating magnetic field generated by the primary conductor winding is essentially zero
Data Source
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AI summary
The invention relates to a system for the non-contact transmission of energy to a vehicle, in particular to a vehicle having an energy store, from which the drive of the vehicle can be supplied, wherein the system has a stationary part, in particular an assembly arranged on the ground, having a primary conductor winding for the inductive transmission of energy to a secondary winding arranged on the vehicle, wherein the arrangement has an antenna which has at least two winding sections, the respective unwound area, winding direction and number of windings of which are chosen in such a way that the sum of the voltages induced by the alternating magnetic field generated by the primary conductor winding in both winding sections is substantially zero.