Solar Panel Dielectric Barrier for Arc Prevention
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Solution Overview
Problem
Modern satellite solar generators face increased risks of electric arcs due to higher voltage levels, which can damage the panels and reduce photovoltaic power output, as existing arc prevention methods are insufficient in the space environment.
Innovation Solution
The solar panel design incorporates dielectric barriers made of flexible polyimide polymer materials, arranged between photovoltaic cells to minimize the risk of electric arcs by increasing the distance between conductive components and avoiding shadowing, while maintaining a compact and efficient energy production configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the voltage of solar generators is increased to meet the power needs of modern satellites, then the electrical energy production capacity is improved, but the risk of electric arcs between conductors increases
Solution Approach 1:
A dielectric barrier is introduced as an intermediary element between adjacent photovoltaic cells. This barrier physically separates conductive components from different cells, preventing direct electrical contact and arc formation while allowing the high-voltage system to operate safely. The barrier acts as a mediator that blocks harmful electrical discharge between cells operating at high voltages.
2Reliability
If dielectric barriers are added between photovoltaic cells to prevent electric arcs, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The dielectric barrier is implemented as a thin film or flexible barrier material that can be integrated between cells without requiring complex rigid structures. This thin-film approach provides effective arc prevention while minimizing the increase in device complexity and maintaining a compact panel design.
Solution Approach 2:
The barrier extends in the dimension perpendicular to the panel surface, creating a three-dimensional separation between conductive components on the two-dimensional cell surfaces. This dimensional approach to arc prevention avoids the need for complex lateral shielding structures.
3Reliability
If the barrier protrudes from the panel surface to effectively prevent arcs, then the arc prevention capability is improved, but the area occupied by the panel structure increases
Solution Approach 1:
The barrier is implemented as a thin film that protrudes minimally from the panel surface, providing effective arc prevention through dielectric separation without significantly increasing the overall panel volume. The thin-film nature allows effective arc blocking with minimal spatial occupation.
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 significantly reduces the occurrence of electric arcs, ensuring the longevity and productivity of the solar panels across varying satellite orientations without requiring structural changes, allowing for compact folding during launch and deployment.
Implementation Method 1
the electrical current conductors used in these components, are particularly exposed to risks of short circuit or breakage (open circuit) in the event of an electric arc
Implementation Method 2
a precursor phenomenon such as an electrostatic discharge, a micrometeorite impact, or a high voltage event can generate a local plasma
Implementation Method 3
solar panels, also called solar generators, which are used to power at least some of the satellite's electrical components
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
This solar panel (12) comprises a structure (14) and at least two photovoltaic cells (16A, 16B), each defining a lateral contact face (30A, 30B) and comprising a base element (20A, 20B), a grid of electrical conductors (24A, 24B), and a protective element (22A, 22B) made of transparent material. The grid (24A, 24B) includes at least one conductive wire running along the lateral contact face (30A, 30B). The cells (16A, 16B) are arranged on the structure (14) such that at least one portion of each of the lateral contact faces (30A, 30B) is positioned opposite the other portion. The solar panel (12) further includes a barrier (18A) of dielectric material disposed on the structure (14) between the lateral contact faces and extending along the parts opposite these faces (30A, 30B).