Inverter Cover Rib Layout for Drive Motor Vibration Suppression
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Solution Overview
Problem
Existing in-vehicle electric compressors experience noise due to inverter cover vibration, which conventional rib arrangements fail to adequately suppress under various vibration conditions.
Innovation Solution
The inverter cover is divided into two regions with parallel first ribs and radially extending second ribs, along with a connecting portion, to alter resonance frequencies and enhance rigidity, thereby suppressing vibration and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a plurality of ribs are formed on the inverter cover to suppress vibration, then vibration suppression is improved, but the conventional single-type rib arrangements cannot sufficiently suppress vibration under various vibration conditions
Solution Approach 1:
The inverter cover is divided into multiple regions (first region, second region, third region) with different rib arrangements. Each region has ribs with specific patterns (parallel ribs with connecting portions, radially extending ribs, etc.) tailored to suppress vibrations in that particular area, making the overall structure adaptable to various vibration conditions across the cover surface
Solution Approach 2:
Different regions of the inverter cover are given different rib configurations optimized for their specific locations and vibration characteristics. The first region has parallel ribs with connecting portions, the second region has radially extending ribs, and the third region has another pattern of parallel ribs, creating local quality variations that enhance overall vibration suppression effectiveness
Data Source
AI summary
For example, a drive motor module capable of suppressing resonance of an inverter cover due to vibration from a motor or the like is provided. A drive motor module 1 includes a motor, an inverter electrically connected to the motor, a housing that houses the motor and the inverter, and an inverter cover that has a plate shape and covers the inverter. An outer surface of an inverter cover is divided into a first region and a second region in plan view. In the first region, a plurality of first ribs arranged in parallel to each other and a connecting portion extending in a direction intersecting with the first rib and connected to one end side of each of the first ribs are provided in a protruding manner. In the second region, a plurality of second ribs that radially extend are provided in a protruding manner.