Insulated Holding Device for Power Switching Units
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Solution Overview
Problem
Existing power electronic switching systems require housings of switching units to be at a uniform voltage potential, leading to undesirable compensating currents and complex, space-consuming structures, making them difficult and expensive to assemble.
Innovation Solution
Incorporating an insulating material in the holding device to allow housings of switching units to be at different voltage potentials, with each housing featuring material for partial shielding against electric and magnetic fields, simplifying the structure, reducing space requirements, and facilitating easy assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If housings of switching units are made conductive and connected to uniform voltage potential, then electrical conductivity is improved, but compensating currents occur and structure becomes complex
Solution Approach 1:
The holding device is segmented into individual insulating elements for each switching unit, allowing each unit to be electrically isolated. This segmentation enables different voltage potentials on different housings without creating compensating currents, while simplifying the overall structure by eliminating the need for complex interconnecting rails and frame structures.
Solution Approach 2:
An insulating material is introduced as an intermediary between the holding device and the conductive housings of switching units. This intermediary prevents direct electrical contact, allowing housings to operate at different voltage potentials without generating compensating currents, thereby resolving the contradiction between electrical conductivity and structural complexity.
2Stability of the object's composition
If two rails per switching unit are used for mounting, then mounting stability is improved, but space requirements increase and assembly complexity increases
Solution Approach 1:
The mounting function and electrical insulation function are merged into a single insulating element on the holding device. This eliminates the need for separate rails and frame structures, reducing space requirements while maintaining mounting stability through the integrated insulating component.
3Adaptability or versatility
If housings are made of insulating material, then different voltage potentials are enabled, but shielding against electric and magnetic fields is reduced
Solution Approach 1:
Different parts of the system have different electrical properties: the holding device and its elements are insulating to enable different voltage potentials, while the housings of switching units are conductive to provide electromagnetic shielding. This local differentiation of material properties resolves the contradiction between voltage flexibility and field shielding.
4Stability of the object's composition
If complex assembly structure with frame and rails is used, then mounting stability is improved, but assembly time increases and production cost increases
Solution Approach 1:
The mounting system is segmented into modular insulating elements that can be independently installed on the holding device. This modular approach simplifies assembly compared to complex frame and rail structures, reducing assembly time and production costs while maintaining mounting stability.
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
Enables housings to operate at different voltage potentials without compensating currents, reduces assembly complexity and costs, and enhances robustness and shielding effectiveness, resulting in a more compact, inexpensive, and efficient power electronic switching system.
Implementation Method 1
The holding device 4 has an insulating material for electrically insulating the holding device 4 from the housings 8 of the switching units 2 and from the housings 8 of the switching units 2 from one another
Implementation Method 2
the housing 8 of each switching unit 2 has a material for at least partial shielding of an electric and magnetic field
Data Source
Figure 1
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AI summary
A power electronic switching system (1) having a multiplicity of switching units (2) is stated, wherein each switching unit (2) has a housing (8) and at least one switching module (9) arranged inside the housing (8). The power electronic switching system (1) also comprises a mounting unit (3), wherein the mounting unit (3) has a holding apparatus (4), on which holding apparatus (4) the housings (8) of the switching units (2) are arranged. So that the housings of the switching units of the switching system can have different voltage potentials and can also be easily implemented in a space-saving manner and can be mounted without any problems, the holding apparatus (4) has an insulation material for electrically insulating the holding apparatus (4) from the housings (8) of the switching units (2) and the housings (8) of the switching units (2) from one another. The housing (8) of each switching unit (2) also has a material for at least partially screening an electrical field and a magnetic field.