Coupling Strip De-Icing Using Skin-Depth Current Shaping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conductive surfaces on vehicles and aircraft face inefficiencies and safety risks due to ice accumulation, as existing heating systems are often bulky and inefficient, lacking effective solutions for localized heating.
Innovation Solution
The use of higher frequency alternating electric current (AC) signals to induce Joule heating in conductive materials by shaping current density through mechanisms like the skin effect and proximity effect, increasing effective resistance and localized heating performance without requiring excessive current or bulk equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional heating systems are used to prevent ice accumulation on conductive surfaces, then heating function is provided, but the systems are bulky and require excessive current
Solution Approach 1:
The patent replaces traditional mechanical/electrical heating systems with a electromagnetic field-based heating approach. By applying high-frequency AC current to the conductive surface, the system utilizes electromagnetic induction to generate heat directly within the material, eliminating the need for bulky external heating elements and complex electrical wiring systems.
Solution Approach 2:
The patent changes the electrical parameters by using high-frequency AC current instead of traditional low-frequency or DC heating systems. This parameter change enables the exploitation of skin effect and proximity effect to concentrate current density at the surface, generating heat where needed while reducing overall system complexity and current requirements.
2Reliability
If traditional heating systems are used to heat conductive surfaces, then ice accumulation is reduced, but the systems are inefficient and require excessive current
Solution Approach 1:
The patent applies local quality by concentrating the heating effect precisely at the conductive surface where ice accumulation occurs. Through skin effect and proximity effect, the high-frequency AC current generates heat locally at the surface rather than requiring high current throughout the entire system, thereby reducing overall energy consumption while maintaining effective ice prevention.
Solution Approach 2:
The patent employs periodic action by using high-frequency alternating current to generate heat cycles within the conductive surface. This periodic heating is more efficient than continuous traditional heating because it exploits the material's electrical properties at high frequencies to generate heat on-demand, reducing total energy consumption while maintaining ice prevention effectiveness.
3Manufacturing precision
If high frequency AC current is used to shape current density through skin effect and proximity effect, then localized heating performance is improved, but the system requires precise control mechanisms
Solution Approach 1:
The patent applies self-service by utilizing the inherent electromagnetic properties of the conductive material itself to achieve precise localized heating. The skin effect and proximity effect automatically concentrate current density at the surface without requiring external control mechanisms, thereby achieving high manufacturing precision while minimizing control system 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 approach enables efficient, localized heating that reduces ice accumulation and prevents freezing on conductive surfaces, improving safety and efficiency while being lighter, less bulky, and easier to install or retrofit.
Implementation Method 1
The skin effect constrains current flow by taking advantage of the tendency of an alternating electric current to become distributed within a conductor such that the current density increases near the surface of the conductor, and decreases with greater depths in the conductor.
Implementation Method 2
The proximity effect can be used to further constrain current flow in the conductor by placing another AC current path near the existing current flowing in the conductor. The proximity effect can also act to lengthen the current path.
Implementation Method 3
Joule heating, also known as ohmic heating or resistive heating, is the process by which the passage of an electric current through a conductor produces heat.
Data Source
AI summary
Aspects of the present disclosure can be embodied in a systems for heating an exterior surface of a bulk medium. In one example, the system includes two or more coupling strips spaced apart from one another and attached to the bulk medium. Each of the coupling strips has a multi-layer structure extending along a surface of the bulk medium that forms, in combination with the bulk medium, an electrical transmission line. The multi-layer structure includes a first dielectric layer over the bulk medium, a conductive layer over the first dielectric layer, a second dielectric layer over the conductive layer, and a conductive shielding layer over the second dielectric layer. A power control system is coupled to the conductive layer of each of the coupling strips and to the bulk medium. The power control system is configured to heat the bulk medium by providing current to the coupling strips.