Vehicle Charging Apparatus EMC Filter and Shielding Chamber Design

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Solution Overview

Problem

Charging apparatuses for vehicles are susceptible to electromagnetic interference, which can negatively impact their functionality due to the transmission of electromagnetic interference between the power section and control signals.

Innovation Solution

A filter circuit, such as an EMC filter circuit, is arranged between the power section and the control signal interface, physically separating and shielding these components to reduce electromagnetic interference, and the charging apparatus includes a housing with shielding chambers to further suppress interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the power section and control signal interface are integrated in the same housing, then the device complexity is reduced, but electromagnetic interference is transmitted between these components

Engineering Contradiction:

Improvestructural complexityVSAvoidelectromagnetic interference

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The housing is divided into multiple shielding chambers that spatially separate the power section and control signal interface. This segmentation allows both components to coexist in the same housing while preventing electromagnetic interference through physical and electromagnetic isolation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Filter circuits are introduced as intermediary components between the power section and control signal interface. These filters act as mediators that allow necessary signal transmission while blocking harmful electromagnetic interference.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If shielding chambers are added to separate the power section and control signals, then electromagnetic interference is reduced, but the device complexity increases

Engineering Contradiction:

Improveelectromagnetic interferenceVSAvoidstructural complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

Multiple shielding chambers are merged into a single integrated housing structure. The shielding chambers share common walls and are part of the overall housing architecture, which reduces the incremental complexity compared to adding separate shielding components.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The housing structure serves multiple functions: it provides mechanical protection, spatial mounting for components, and electromagnetic shielding through the integrated shielding chambers. This multi-functionality reduces the need for additional separate shielding components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Object-affected harmful factors

If filter circuits are placed between the power section and control signal interface, then electromagnetic interference transmission is reduced, but the device complexity increases

Engineering Contradiction:

Improveelectromagnetic interference transmissionVSAvoidcircuit complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The filter circuits are designed to be self-contained modules that can be independently configured and replaced. Each filter circuit serves its specific function without requiring complex integration with other parts of the system, simplifying the overall design and maintenance.

Inventive Principle:

Principle #25Self-service

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 solution significantly enhances the robustness of the charging apparatus against electromagnetic interference, ensuring reliable operation by minimizing the transmission of electromagnetic interference between the power section and control signals.

Implementation Method 1

A filter circuit, such as an electromagnetic compatibility (EMC) filter circuit, is arranged between the power section and the control signal interface. The transmission of line-related instances of interference between the power section and the control signals can be reduced by the filter circuit

Methodology Applied

Scientific EffectElectromagnetic filtering: Filter (electronic)

Implementation Method 2

The housing has a first shielding chamber, and the power section may be arranged in the first shielding chamber. The transmission of non-line-related instances of interference from the power section and/or to the power section can be suppressed by the first shielding chamber

Methodology Applied

Scientific EffectElectromagnetic shielding: Faraday Cage

Data Source

PatentUS11083119B2Charging apparatus for a vehicle and vehicle having a charging apparatus

Publication Date: 2021.08.03 DR ING H C F PORSCHE AG

AI summary

A charging apparatus (2) for a vehicle (1) has a power section (3) and a control signal interface (4) for connecting control signals (102) to the power section (3). A filter circuit (5), in particular an EMC filter circuit, is arranged between the power section (3) and the control signal interface (4). A vehicle (1) having such a charging apparatus (2) also is provided.