Segmented Transmission Coil for Inductive EV Charging
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Solution Overview
Problem
Existing inductive energy transfer systems for charging vehicles require multiple separate components, including power electronics and capacitance, which occupy significant space and increase complexity.
Innovation Solution
A transmission coil design that integrates a coil arrangement with multiple turns and a multiplicity of capacitors, where each capacitor is assigned to an individual turn or group of turns, housed on a carrier, eliminating the need for external components and allowing for compact and efficient energy transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single capacitance is assigned to the entire coil arrangement, then the oscillatory circuit can be formed, but the installation space and complexity increase due to requiring high-capacitance components and separate arrangement of power electronics
Solution Approach 1:
The patent divides the single capacitance into multiple smaller capacitors, with each capacitor assigned to an individual turn or group of turns of the coil arrangement. This segmentation allows the capacitors to be compactly arranged on the carrier along with the coil turns, eliminating the need for separate power electronics arrangements and reducing overall device complexity while maintaining oscillatory circuit functionality for efficient energy transfer
2Ease of manufacture
If power electronics and capacitance are arranged spatially separate from the coil arrangement, then the system is easier to manufacture, but the installation space and weight increase significantly
Solution Approach 1:
The patent merges the coil arrangement, multiple capacitors, and power electronics onto a single carrier, creating an integrated transmission coil assembly. This consolidation significantly reduces the installation space and weight compared to separate arrangements, while the modular carrier design maintains ease of manufacture and assembly
3Volume of moving object
If multiple capacitors are used instead of a single capacitance, then the installation space is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent segments the total capacitance into multiple smaller capacitors distributed across different turns or groups of turns. This segmentation reduces the space required for each individual capacitor and their overall arrangement on the carrier, while the systematic distribution pattern simplifies positioning requirements compared to accommodating a single large capacitor
4Adaptability or versatility
If individual capacitors are assigned to individual turns or groups of turns, then the system allows for turn deactivation for magnetic field optimization, but the device complexity increases
Solution Approach 1:
The patent assigns individual capacitors to individual turns or groups of turns, creating independently controllable oscillatory circuits. This segmentation enables selective deactivation of specific turns to optimize the magnetic field distribution, while the systematic assignment pattern and integrated carrier design keep the overall device complexity manageable
Solution Approach 2:
The patent enables dynamic control of the transmission coil by allowing selective activation or deactivation of individual turns or groups of turns through their associated capacitors. This dynamic capability allows optimization of the magnetic field for different operating conditions, enhancing system adaptability while maintaining a structured and manageable device architecture
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 design reduces installation space, weight, and costs by integrating all necessary components on a single carrier, enabling efficient energy transfer without additional components and allowing for individual turn or group deactivation for magnetic field optimization.
Implementation Method 1
the primary coil is excited with an alternating voltage, as a result of which an alternating magnetic field is produced in the region of the primary transmission coil
Implementation Method 2
oscillatory circuits are formed from a coil arrangement with a multiplicity of turns and a capacitance
Data Source
AI summary
The invention relates to a transmission coil (10) configured for inductive energy transfer, comprising a carrier (17), a coil arrangement (11) having a plurality of turns (12), and a capacitance. It is thereby provided that the capacitance is formed of a plurality of capacitors (22), wherein each capacitor (22) is assigned to an individual turn (12) or to a group of at least two turns (12) of the coil arrangement (11), and together with the coil arrangement, the capacitors (22) are arranged on the carrier (17). The invention further relates to a stationary charging station and to a vehicle, each comprising such a transmission coil (10), and to a system for the inductive charging of vehicles. No drawing text to be translated.