Modular Electric Device Metal Plastic Housing Shielding
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Solution Overview
Problem
Existing modular electrical devices face challenges in achieving good electromagnetic compatibility while maintaining a lightweight and cost-effective structure, as complete metal encapsulation leads to heavy and expensive designs, and existing modular designs do not effectively shield interference between power and control modules.
Innovation Solution
A modular electrical device with a power module housed in a metal hollow body and a control module in a plastic housing closed by a metal plate, where the metal plate seals the power module's open side during assembly, providing effective shielding against interference radiation while allowing for modular design and cost-effective manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If all modules are completely encapsulated in closed metal enclosures, then electromagnetic compatibility and shielding against interference are improved, but weight and manufacturing cost increase significantly
Solution Approach 1:
The patent applies local quality by providing metal shielding only where interference radiation occurs (power module housing) while leaving other areas (control module housing) with plastic material. This selective application of metal enclosures shields the power module's broadband interference pulses from affecting the control module, while avoiding unnecessary weight and cost from complete metal encapsulation of the entire device.
2Object-generated harmful factors
If power modules are completely enclosed in metal housings, then interference pulse emission and ingress are prevented, but device weight and manufacturing cost increase
Solution Approach 1:
The patent implements local quality by enclosing only the power module in a metal housing to contain its broadband interference pulses, while the control module uses a lighter plastic housing. This targeted approach prevents interference pulse emission from the power module without requiring complete metal encapsulation of the entire device, thereby reducing overall weight and manufacturing cost.
3Object-affected harmful factors
If modular design with separate power and control modules is implemented, then electromagnetic interference between modules is reduced, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent applies segmentation by dividing the electrical device into separate functional modules: a power module with high-current components and a control module with low-voltage electronics. Each module has its own housing and can be manufactured independently, then assembled together. This modular structure reduces electromagnetic interference between modules while maintaining manageable device complexity through standardized interfaces and assembly procedures.
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 achieves improved electromagnetic compatibility, reduced weight, and a cost-effective structure by ensuring the power module is completely encapsulated in metal, minimizing interference radiation and enabling adaptable designs for varying power conversions without altering the control module's uniform design.
Implementation Method 1
The metallized surface, together with the metal housing part, forms a Faraday cage that shields the components arranged inside from external interference radiation
Implementation Method 2
Both the propagation and the ingress of interference pulses can be prevented by using metal enclosures
Data Source
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Figure 3
AI summary
The invention relates to an electric device with a modular design, having an electric output module and an electric control module for electrically controlling the output module. The output module and the control module have housings which are connected together or can be connected together and which have outer housing surfaces made of metal and plastic. The housing of the control module is designed as a hollow body that is made of plastic and has an open side which is closed by a metal plate, and the housing of the output module is designed as a hollow body that is made of metal and has an open side. After the housings of the control module and the output module are joined, the metal plate arranged on the control module closes the open side of the housing of the output module.