Bus-Bar System Magnetic Field Attenuation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electrical cabinets emit strong magnetic fields due to their bus-bar systems, exceeding safety limits and causing interference, with existing solutions either requiring costly metallic shielding or relocation, which are inefficient and complex.
Innovation Solution
The design rearranges internal wiring and bus-bar systems within electrical cabinets to form self-protective structures where magnetic fields from different elements destructively interfere, reducing the overall magnetic field strength, allowing for the use of regular materials and placement in populated areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If thick metal sheets are used to shield the electrical cabinet, then magnetic field attenuation is improved, but device complexity and cost increase
Solution Approach 1:
The patent converts the harmful magnetic fields generated by bus-bars into a beneficial self-shielding effect by strategically positioning parallel bus-bars carrying different phases adjacent to each other. The magnetic fields from these adjacent bus-bars destructively interfere with each other, automatically attenuating the overall magnetic field emission without requiring external shielding materials.
Solution Approach 2:
The electrical cabinet's own bus-bar system provides the shielding function through its inherent configuration. The bus-bars are arranged to generate opposing magnetic fields that cancel each other out, making the cabinet self-shielding and eliminating the need for separate metallic shielding structures.
2Object-affected harmful factors
If the electrical cabinet is relocated to distant locations, then magnetic field exposure is reduced, but ease of operation and accessibility deteriorate
Solution Approach 1:
The harmful magnetic fields are converted into a self-attenuating phenomenon through the strategic arrangement of parallel bus-bars. By positioning bus-bars carrying different phases adjacent to each other, the system generates opposing magnetic fields that destructively interfere, reducing exposure without requiring relocation.
3Object-affected harmful factors
If metallic protective elements are used to enclose distribution connectors, then local magnetic field protection is improved, but device complexity increases and front access must be left open
Solution Approach 1:
Instead of using metallic protective elements to shield distribution connectors, the patent employs the bus-bar arrangement to generate self-canceling magnetic fields throughout the cabinet. This eliminates the need for localized shielding around connectors while maintaining overall magnetic field attenuation.
Solution Approach 2:
The bus-bar system serves dual functions: electrical power distribution and magnetic field attenuation. The same bus-bars that carry electrical current are strategically positioned to create opposing magnetic fields, providing both functional and protective roles without requiring separate shielding components.
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 approach effectively attenuates magnetic fields to safe levels without the need for metallic shielding or relocation, enabling the use of conventional electrical cabinets in any location while maintaining safety and reducing exposure.
Implementation Method 1
the sub-bus-bar elements are arranged such that each sub-bus-bar element is located adjacent at least one other sub-bus-bar element associated with different electrical phase, to thereby cause magnetic fields emanating from the sub-bus-bar elements to destructively interfere with each other
Data Source
Figure 1
Figure 2A~2B
Figure 2C~3A
AI summary
A bus-bar system usable for electrical cabinets for distributing electrical power supplied by an electrical supply cable comprising two or more electrically conducting wires. In some embodiments the bus-bar system comprises a predetermined number of bus-bar elements each electrically connectable to at least one of the wires of the electrical supply cable. At least one of the bus-bar elements may be formed by a group of at least two sub-bus-bar elements electrically connectable to each other in parallel. Each group of the sub-bus-bar elements may be electrically connectable to at least one of the wires of the electrical supply cable, where each of said bus-bar and sub-bus-bar elements being located adjacent at least one other bus-bar or sub-bus-bar element associated with either different electrical phase or different electrical current direction to thereby cause magnetic fields emanating from said bus-bar and sub-bus-bar elements to destructively interfere with each other.