Laminated Bus Bar Layout for Visible, Replaceable Converter Fuses
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Solution Overview
Problem
In power conversion devices, the complex configuration of laminated bus bars for attaching fuses between power converters complicates installation and replacement, increasing processing costs and reducing visibility of fuses, which hinders the achievement of commonality among power converters.
Innovation Solution
A laminated bus bar design with a flat plate portion featuring alternately stacked conductive and insulating plates, allowing for a simple configuration that facilitates the alignment and visibility of fuses, enabling commonality among power converters while maintaining bidirectional power conversion capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If four fuses are arranged in alignment in a depth direction and normal direction of the stage to fit the space between two power converters, then the space utilization is improved, but the conductive members must be formed into a complicated shape which reduces workability in installation and replacement of fuses
Solution Approach 1:
The patent transitions from arranging fuses in a depth-aligned configuration (one-dimensional stacking) to a planar configuration where fuses are arranged side-by-side in the width direction of the conductive member. This dimensional change allows all four fuses to be accessible from the front surface, eliminating the need for complicated shaped conductive members while maintaining space efficiency.
2Area of stationary object
If four fuses are arranged in alignment in a depth direction, then the space between two power converters is fully utilized, but the fuse on the back side is less visible making it difficult to visually check whether fuses are damaged
Solution Approach 1:
The patent rearranges fuses from a depth-direction alignment to a width-direction alignment on the conductive member surface. This positional reconfiguration in the width dimension ensures all fuses are visible from the front, enabling easy visual inspection for damage while maintaining compact space utilization between power converters.
Solution Approach 2:
The patent specifies that fuses are arranged to be visible from the front surface, implying use of visual indicators or color-coded elements that allow easy detection of fuse status and damage conditions, improving detectability without requiring disassembly or complex inspection procedures.
3Ease of operation
If laminated bus bars of different configurations are employed for power converters to avoid the above inconveniences, then the workability and visibility of fuses are improved, but the commonality of power converters cannot be achieved
Solution Approach 1:
The patent designs a universal conductive member configuration with standardized width, length, and fuse arrangement that can be used across different power converter models. This universal design allows all fuses to be accessible and visible while maintaining compatibility with common power converter configurations, achieving both operational ease and component commonality.
Solution Approach 2:
The patent specifies particular dimensional parameters for the conductive member (width, length, thickness) and fuse positioning that create a standardized configuration. By controlling these parameters, the design achieves compatibility across different power converter models while maintaining improved fuse accessibility and visibility, thus preserving commonality without sacrificing workability.
Data Source
AI summary
A first AC terminal, a first positive DC terminal, and a first negative DC terminal protrude from a first end portion in the length direction of a flat plate portion of a laminated bus bar. The first AC terminal, the first positive DC terminal, and the first negative DC terminal are arranged in alignment in this order from a third end portion toward a fourth end portion in a width direction of the flat plate portion. A second AC terminal, a second positive DC terminal, and a second negative DC terminal protrude from a second end portion of the flat plate portion in the length direction. The second AC terminal, the second negative DC terminal, and the second positive DC terminal are arranged in alignment in this order from the third end portion toward the fourth end portion.