Electric Compressor Rib Structure for Bus Bar Vibration Suppression
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Solution Overview
Problem
Existing electric compressors with inverter accommodation portions fail to sufficiently suppress vibration-induced resonance in bus bar assemblies, leading to potential breakage of resin-molded components.
Innovation Solution
The electric compressor design incorporates a rib structure within the inverter cover that projects into the accommodation space, providing support and fixation for the bus bar assembly through multiple fastening and positioning features, enhancing structural strength and reducing resonance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bus bar assembly is fixed to the inverter accommodation portion with screws at spots, then the bus bar assembly can be secured, but vibration-induced resonance cannot be sufficiently suppressed leading to potential breakage
Solution Approach 1:
The patent combines multiple fastening functions (positioning, support, and fixation) into a single integrated rib structure. The rib structure merges the positioning portion, support portion, and fastening portion into one component that simultaneously performs all three functions, thereby providing comprehensive vibration suppression and securing the bus bar assembly more effectively than separate spot-fixing methods.
Solution Approach 2:
The patent transitions from two-dimensional spot fixation to three-dimensional distributed fixation. The rib structure extends in the longitudinal direction of the bus bar assembly, providing support along the length rather than at discrete points. This dimensional expansion creates multiple fastening portions that distribute the mechanical stress and suppress resonance more effectively throughout the entire assembly.
2Ease of manufacture
If spot fixation with screws is used, then installation is simple, but the inverter cover rigidity and vibration suppression are insufficient
Solution Approach 1:
The rib structure is pre-formed as an integral part of the inverter cover molding, creating the support and fastening features before assembly. This preliminary formation of the rib structure with its positioning and fastening portions eliminates the need for separate fixation components, maintaining ease of manufacture while providing enhanced rigidity and vibration suppression through the integrated design.
3Reliability
If multiple fastening portions are added to the rib structure, then vibration suppression improves, but the device complexity increases
Solution Approach 1:
The rib structure is designed as a multi-functional component that simultaneously serves as a support element, positioning feature, and fastening mechanism. The single rib structure performs multiple functions (supporting the bus bar assembly, positioning it correctly, and fastening it through integrated fastening portions), thereby improving vibration suppression without proportionally increasing device complexity.
Solution Approach 2:
The fastening portions are integrated within the rib structure itself rather than being separate components. The positioning portion and support portion are nested within the same rib formation, creating a compact multi-functional element that provides enhanced vibration suppression while minimizing the increase in overall device complexity.
Data Source
AI summary
An electric compressor is provided to more securely suppress breakage of an electric component. An inverter cover forms an accommodation space. A bus bar constituting a portion of an electric circuit for driving an electric motor is accommodated in the accommodation space. The inverter cover has a rib projecting into the accommodation space. The bus bar is placed on the rib.