Capacitive Windshield Power Transfer for Moving Window Guides
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Solution Overview
Problem
Electrical contact-connection in moving motor vehicle components, such as windows, faces challenges due to displacement kinematics, noise prevention, moisture, dust, salt, and high voltages, requiring a reliable and safe energy transmission method that prevents jamming and line breakage while ensuring workplace safety and end-user protection.
Innovation Solution
A capacitive energy transmission apparatus using capacitance elements integrated into the motor vehicle window guide and window region, allowing for flexible geometric shapes and minimal spacing changes, with capacitive coupling that is insensitive to displacement, and hermetically sealed connections to prevent oxidation and ensure safety, enabling the transmission of electrical energy and data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical contact-connection is used in moving motor vehicle components, then energy transmission can be achieved, but the lines are subject to jamming by displacement kinematics and may break after certain cycles
Solution Approach 1:
The patent replaces the mechanical contact-based energy transmission system with a capacitive coupling system. Instead of using physical contact lines that slide and wear, the invention uses electric fields to transmit energy wirelessly across the moving interface. The capacitive coupling elements (first and second capacitance elements in the window guide, third and fourth capacitance elements in the window) create an electric field that transfers energy without mechanical contact, eliminating wear and jamming issues.
2Power
If contact lines are used for energy transmission, then power can be delivered, but the lines must be prevented from oscillating to avoid noise
Solution Approach 1:
The invention eliminates mechanical contact lines entirely and replaces them with a capacitive energy transmission system. Energy is transmitted through an electric field between capacitive coupling elements on the stationary side (window guide) and moving side (window). This wireless transmission method produces no mechanical oscillation or noise while maintaining full power transmission capability.
3Reliability
If traditional contact connections are used, then energy transmission is possible, but moisture, dust, and salt create significantly higher effort for permanent and reliable connection
Solution Approach 1:
The patent replaces exposed mechanical contact connections with a sealed capacitive coupling system. The capacitive elements are integrated into the window guide and window structures, creating enclosed electric field paths that are protected from environmental contaminants. This eliminates the need for contact lines to penetrate sealed structures, preventing moisture, dust, and salt from degrading the connection.
Solution Approach 2:
The capacitive coupling elements act as intermediaries that transfer energy without requiring direct physical contact between the stationary and moving components. The electric field serves as the medium for energy transmission, allowing the system to maintain sealed structures while still achieving reliable energy transfer across the moving interface.
4Power
If high voltages above safe contact voltage are transmitted, then sufficient power is delivered, but workplace safety requirements and end-user protection become more difficult to ensure
Solution Approach 1:
The invention replaces exposed high-voltage contact connections with a capacitive coupling system that inherently provides electrical isolation. The capacitive elements create an electric field barrier that prevents direct contact with high voltage, protecting both workers during installation/maintenance and end users during operation. The system maintains high power transmission capability while eliminating exposed conductive parts.
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 solution provides a simple and reliable energy transmission to motor vehicle components, ensuring safe operation and protection from high voltages, while allowing for flexible installation and efficient sealing of the motor vehicle window, thus addressing the challenges of noise, moisture, and displacement.
Implementation Method 1
the electrical energy can be transmitted from the first capacitance element to the second capacitance element and from the third capacitance element to the fourth capacitance element by way of a capacitive coupling
Implementation Method 2
the electrical energy can be transmitted from the first capacitance element to the second capacitance element and from the third capacitance element to the fourth capacitance element by way of a capacitive coupling
Data Source
AI summary
An energy transmission device for wirelessly transmitting electric energy includes a first capacitance device which has a first and a second capacitance element and a second capacitance device which has a third and a fourth capacitance element. The electric energy can be transmitted from the first capacitance element to the second capacitance element and from the third capacitance element to the fourth capacitance element by way of a capacitive coupling. The motor vehicle component is designed as a motor vehicle windshield, the first capacitance element and the third capacitance element are designed as a motor vehicle windshield guide of the motor vehicle, and the second capacitance element and the fourth capacitance element are formed on a motor vehicle windshield region of the motor vehicle windshield corresponding to the motor vehicle windshield guide.