Detachable Filter Module Shielding for Vehicle DC Power Lines
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Solution Overview
Problem
Components developed for shielded onboard power supplies are not suitable for unshielded networks, requiring additional costly filters and larger components to meet electromagnetic compatibility (EMC) requirements.
Innovation Solution
A filter module is used to connect components to a DC voltage onboard power supply, featuring a shielding means to dampen alternating voltage fluctuations and suppress electromagnetic radiation, allowing components designed for shielded networks to be used in unshielded ones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If components are designed for shielded onboard power supplies, then electromagnetic compatibility is improved, but adaptability to unshielded networks deteriorates
Solution Approach 1:
A filter module is introduced as an intermediary component between the component and the onboard power supply. This filter module can be selectively connected to provide electromagnetic filtering when needed, allowing the same component to work with both shielded and unshielded power supplies. The filter module acts as a mediator that enables compatibility without requiring different component designs.
Solution Approach 2:
The system transitions from a static component design to a dynamic configuration where the filter module can be selectively connected or disconnected. This dynamic approach allows the electromagnetic compatibility characteristics to be adjusted based on the specific application requirements, enabling the same component to adapt to different vehicle platforms with different power supply shielding configurations.
2Reliability
If internal filters are added to components for unshielded onboard networks, then electromagnetic compatibility is improved, but device complexity and cost increase
Solution Approach 1:
The filtering function is extracted from the main component and placed in a separate, modular filter module. This extraction allows the component itself to remain simple while the filtering capability is provided externally through the detachable filter module. The filtering function is separated from the core component functionality, reducing the complexity of the component design.
Solution Approach 2:
The electromagnetic compatibility solution is segmented into a separate filter module that can be independently designed, manufactured, and connected as needed. This segmentation allows the component and the filter to be developed independently, with the filter module serving as a standalone unit that can be attached to unshielded power supply configurations when required.
3Reliability
If internal filters are added to components for unshielded onboard networks, then electromagnetic compatibility is improved, but manufacturing cost increases
Solution Approach 1:
The filter module is designed as a universal solution that can be used across multiple vehicle platforms and component types. By creating a standardized, reusable filter module that can be applied to various unshielded power supply configurations, the manufacturing cost is reduced through economies of scale and standardized production processes, rather than requiring custom filters for each component.
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
The filter module enables components to be compatible with various vehicle platforms, reducing development costs and allowing for larger production lots, while maintaining EMC compliance without the need for internal filters in components.
Implementation Method 1
a shielding means (9), which encloses either at least one power supply line (7), connecting the respective component (3) to the respective component connection (8) of the filter module (4), or at least one connection region, in which the component connection (8) or at least one of the component connections contacts a respective power supply connection (20) of the component, together with the component (3) and the filter module (4), and which is adapted to at least partly shield out the electromagnetic radiation emitted from the power supply line (7) or the connection by virtue of the coupled-in alternating voltage
Implementation Method 2
the filter module (4) is designed to dampen alternating voltage coupled into the at least one component connection (8) by the component (3)
Data Source
AI summary
A motor vehicle includes a DC voltage power supply, a component, a filter, and a shield. The component is connected across the filter module to the DC voltage power supply. The filter module is connected across an power supply connection of the filter module to the DC voltage power supply and across a component connection of the filter module to the component. The filter module dampens alternating voltage coupled into the component connection by the component. The shield encloses either a power supply line that connects the component to the component connection, or a connection region in which the component connection contacts a power supply connection of the component, together with the component and the filter module. The shield at least partly shields out electromagnetic radiation emitted from the power supply line or the connection. The component connection is reversibly detachable from the component or the power supply line.