Multi-Layered Transmission Line for Inductive EV Charging
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Solution Overview
Problem
Long power supply lines in electric vehicles using magnetic induction face high self-inductance, leading to increased resistance and current loss, necessitating costly voltage increases and complex capacitor installations to compensate, which are inefficient and costly.
Innovation Solution
A transmission line for capacitive coils is designed with a coaxial cable structure featuring multi-layered cylindrical conductors and dielectrics, minimizing current loss by compensating for line voltage drop due to self-inductance without separate capacitors, through a layered configuration that integrates capacitive and inductive elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If power supply lines become long, then the coverage area increases, but self-inductance increases resulting in high resistance and current loss
Solution Approach 1:
The patent merges the power supply line with capacitive coil structures integrated at regular intervals along the transmission line. This combination allows the transmission line to simultaneously perform power transmission and provide resonant capacitance compensation, reducing current loss without requiring separate capacitor installations.
Solution Approach 2:
The patent changes the electrical parameters of the transmission line by integrating capacitive elements that provide resonant capacitance. This parameter change compensates for the inductive reactance of the long transmission line, reducing the overall impedance and minimizing current loss.
2Reliability
If a large number of resonant capacitors are installed to compensate for voltage due to inductance, then voltage compensation improves, but device complexity and installation complexity increase
Solution Approach 1:
The patent combines the transmission line structure with integrated capacitive coils into a single unified system. This merging eliminates the need for separate capacitor installations and complex wiring arrangements, while maintaining effective voltage compensation through the integrated resonant capacitance.
Solution Approach 2:
The integrated capacitive coil structure serves multiple functions simultaneously: it acts as part of the transmission line for power delivery and provides resonant capacitance compensation. This multi-functionality reduces the number of separate components needed and simplifies the overall system configuration.
3Reliability
If a large number of resonant capacitors are installed, then voltage compensation improves, but installation time increases significantly
Solution Approach 1:
The patent merges the transmission line construction with capacitive coil integration into a single installation process. The capacitive coils are installed as integral parts of the transmission line structure, eliminating the need for separate capacitor mounting and wiring operations, thus significantly reducing installation time.
4Quantity of substance
If resonant capacitors need additional space according to size, then capacitance capacity increases, but cost increases according to number of capacitors
Solution Approach 1:
The patent combines the transmission line conductors with capacitive coil structures, creating a unified component that provides both transmission functionality and capacitance. This integration reduces the total number of discrete capacitor components needed while maintaining the required capacitance capacity for voltage compensation.
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 reduces current loss and minimizes the need for additional capacitors, lowering costs and simplifying installations by integrating capacitance within the transmission line, thereby enhancing the efficiency and reducing the complexity of power transfer systems.
Implementation Method 1
dielectrics arranged between the first cylindrical conductors and the second cylindrical conductors
Implementation Method 2
compensating for line voltage drop due to self-inductance L of the line
Implementation Method 3
draw high-frequency power to drive through electromagnetic induction between power supply lines and power collection equipment
Data Source
AI summary
The present invention provides a transmission line for a capacitive coil. The transmission line may include: a plurality of first cylindrical conductors; a plurality of second cylindrical conductors arranged alternately with the first cylindrical conductors in a layered structure; and dielectrics arranged between the first cylindrical conductors and the second cylindrical conductors. According to the present invention, a coaxial cable having multi-layered pairs of cylindrical conductors and dielectrics inserted between the cylindrical conductors or a cable having one or more layers of conductors separated by dielectrics is provided to thereby minimize current loss in a transmission line by compensating for line voltage drop due to self-inductance L of the line.