Motor-Inverter Sealing Structure for Connector Misalignment
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Solution Overview
Problem
Existing inverter systems for electric turbochargers face challenges in maintaining water-tightness and preventing the intrusion of water into the inverter casing, especially when there are misalignments between the inverter and motor connectors.
Innovation Solution
The inverter integrated gas supply device incorporates a motor-side connection part with a motor-side connector housing, a motor connector, and a first sealing member, along with an inverter-side connection part with an inverter-side connector housing and an inverter connector. This configuration ensures water-tightness by using sealing members and allows for variable positioning of the inverter connector to accommodate misalignments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed connection structure is used between inverter and motor, then manufacturing precision can be improved, but adaptability to misalignment deteriorates
Solution Approach 1:
The connection structure is designed to be dynamically adjustable rather than fixed. The inverter housing includes a positioning structure with adjustable elements that can adapt to misalignment between motor and inverter connectors, transforming a static rigid connection into a dynamic adaptable one.
Solution Approach 2:
The positioning structure allows for parameter adjustments in the connection geometry. By changing the positional parameters of the connection interface through the positioning structure, the system can accommodate varying misalignment conditions while maintaining reliable electrical connection.
2Reliability
If sealing members are added to prevent water intrusion, then reliability is improved, but device complexity increases
Solution Approach 1:
The sealing function is merged with the positioning structure of the housing. Rather than adding separate sealing components, the positioning structure itself is designed to provide both positioning and sealing functions, integrating multiple functions into a single structural element.
Solution Approach 2:
The positioning structure serves multiple functions simultaneously: it provides mechanical positioning to accommodate misalignment, maintains structural alignment, and provides sealing to prevent water intrusion. This multi-functionality reduces the need for additional separate components.
Data Source
AI summary
An inverter integrated gas supply device includes an electric motor, an inverter and a cooling water connection structure. The electric motor has a motor casing and a motor-side connection part including a motor connector sealing member. The inverter has an inverter casing and an inverter-side connection part. The cooling water connection structure includes a first interface part formed on the motor casing, a second interface part formed on the inverter casing; and a flow channel sealing member.