Resolver Mounting Structure for Compact Hybrid Vehicle Transmission
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Solution Overview
Problem
Conventional resolver mounting structures in hybrid electric vehicles occupy additional housing space, increasing the length of the transmission housing due to the coupling method with the transmission cover, which limits space for accommodating other transmission components.
Innovation Solution
A mounting structure that press-fits a resolver cover to a supporting end within the transmission housing, creating a mounting space for transmission components like an overdrive brake, while using a bolt to couple the resolver stator to the cover, and incorporating features like oil holes and straight portions to enhance cooling and electromagnetic noise shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the resolver stator is coupled to the cover by a bolt engaging into a tab, then the resolver is securely mounted, but the cover does not provide space for mounting transmission components and the transmission length increases
Solution Approach 1:
The resolver mounting structure is divided into two functional parts: a tab portion for bolt engagement to secure the resolver, and a press-fit portion that integrates into the cover's supporting end to create mounting space. This segmentation allows the same structure to fulfill both secure mounting and space creation functions.
Solution Approach 2:
The resolver cover is nested within the supporting end of the cover, with the press-fit portion inserted into a corresponding recess. This nesting arrangement allows the resolver mounting structure to occupy the same space that would otherwise be available for transmission components, effectively utilizing existing space rather than adding to the transmission length.
2Strength
If the resolver is mounted using a tab and bolt configuration, then the resolver is firmly fixed, but additional housing space is required increasing the transmission length
Solution Approach 1:
The tab and press-fit structures are merged into a single integrated resolver cover component. The tab provides bolt engagement for strong fixation, while the press-fit portion integrates into the cover's supporting end, eliminating the need for additional housing space and reducing transmission length.
3Device complexity
If the resolver stator is directly coupled to the cover, then the mounting is simple, but electromagnetic noise from the motor stator coil enters the resolver stator
Solution Approach 1:
The resolver cover acts as an intermediary barrier between the motor stator coil and the resolver stator. The cover's metallic structure shields the resolver stator from electromagnetic noise generated by the motor, while still allowing simple bolt-based mounting through the integrated tab structure.
Data Source
AI summary
A mounting structure of a resolver of a motor is disclosed. The mounting structure of a resolver of a motor may fix the resolver including a resolver stator and a resolver rotor to a cover of a housing accommodating the motor. The mounting structure may include a resolver cover that is coupled to an edge portion of the resolver stator and press-fitted to a supporting end formed at an inner surface of the cover. In particular, the resolver cover forms a mounting space for mounting a component inside the cover.