Stator Partition Cooling for Neutral Point Terminal Heat
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Solution Overview
Problem
Rotating electric machines experience efficiency reduction due to excessive heat generation, leading to decreased magnetic force and cooling challenges, particularly at the neutral point terminal and coil end portions.
Innovation Solution
A rotating electric machine system with a housing that includes a stator chamber for liquid coolant flow and a partition member with a concave portion to direct coolant flow between the neutral point terminal and the coil end portion, effectively cooling these areas and preventing efficiency decline.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the neutral point terminal is disposed at the coil end portion, then the electromagnetic coils can generate power, but heat generated in the electromagnetic coils is transmitted to the neutral point terminal causing efficiency reduction
Solution Approach 1:
The partition member divides the stator chamber into multiple regions, separating the neutral point terminal from the coil end portion. This segmentation prevents direct heat transmission from the electromagnetic coils to the neutral point terminal while maintaining the power generation function.
Solution Approach 2:
The partition member with concave portion acts as an intermediary structure between the coil end portion and neutral point terminal. It introduces a liquid coolant flow path that mediates heat removal from the neutral point terminal, preventing excessive heat accumulation.
2Temperature
If liquid coolant is introduced to cool the neutral point terminal, then heat removal efficiency improves, but the cooling structure becomes more complex
Solution Approach 1:
The partition member serves multiple functions: it separates the stator chamber regions, provides structural support, and creates the liquid coolant flow path. This multi-functionality avoids the need for separate cooling components, reducing overall structural complexity.
Solution Approach 2:
The liquid coolant flow path is nested within the partition member structure itself. The concave portion is formed as an integral part of the partition member, allowing the cooling function to be embedded within the existing structural component rather than adding external cooling systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution efficiently cools the neutral point terminal and coil end portions, thereby maintaining electromagnetic coil efficiency and preventing heat-induced deterioration.
Implementation Method 1
the neutral point terminal is cooled by the liquid coolant flowing into a concave portion of the partition member
Implementation Method 2
a liquid coolant configured to cool the stator flows through the stator chamber
Data Source
AI summary
A stator of a rotating electric machine system includes a neutral point terminal that is formed in conductive wires that are pulled out from electromagnetic coils. The rotating electric machine system includes a partition member accommodated in a housing. A first wall surface of the partition member faces toward an end part of a coil end portion in an axial direction which includes end parts of the electromagnetic coils. A concave portion recessed in a direction away from the coil end portion is formed in the first wall surface. A liquid coolant flows between the neutral point terminal and a bottom surface of the concave portion.