Stator Housing Cooling Duct Layout for Uniform Heat Dissipation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing stator housings for electrical machines experience non-uniform temperature distribution due to the temperature rise of the cooling fluid from the inlet to the outlet, leading to inefficient heat dissipation and potential thermal faults.
Innovation Solution
The stator housing incorporates a cooling duct with a first heat transfer arrangement in a first section and a second heat transfer arrangement in a second section, where the first heat transfer arrangement provides a larger heat transfer area per unit length than the second, ensuring more uniform temperature distribution by enhancing heat dissipation on the outlet side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cooling duct is provided in the stator housing to dissipate heat from the stator, then the utilization of the electrical machine is increased, but the temperature distribution becomes non-uniform with higher temperatures at the inlet side
Solution Approach 1:
The cooling duct is equipped with heat transfer arrangements that have different heat transfer areas at different locations. Specifically, the heat transfer area per unit length is larger at the outlet side than at the inlet side, creating a non-uniform heat transfer characteristic that compensates for the non-uniform temperature distribution caused by the cooling fluid flow
Solution Approach 2:
The heat transfer area parameter is varied along the length of the cooling duct. By increasing the heat transfer area per unit length at the outlet side where the cooling fluid temperature is higher, the system optimizes heat dissipation to achieve more uniform temperature distribution across the stator housing
2Temperature
If the heat transfer area per unit length is increased at the outlet side to compensate for higher cooling fluid temperature, then temperature distribution uniformity is improved, but the device complexity increases
Solution Approach 1:
The cooling duct is divided into multiple sections along its length, with each section having a specific heat transfer arrangement. This segmentation allows the heat transfer area to be systematically varied from inlet to outlet, implementing the required non-uniform heat transfer characteristic while maintaining a structured and manageable design
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
This design achieves a more uniform temperature distribution along the stator housing, reducing the risk of thermal faults and improving the overall efficiency of heat dissipation, while maintaining a manageable pressure drop and mechanical stress.
Implementation Method 1
When the cooling fluid flows through the cooling duct, the temperature distribution is such that the temperature rises from the inlet to the outlet
Implementation Method 2
the first heat transfer arrangement and a second heat transfer arrangement, which each extend along the direction of flow and are designed to transfer heat from the cooling fluid to the stator housing
Data Source
AI summary
Stator housing for an electrical machine having an inlet and outlet for a cooling fluid, and a cooling duct formed between the inlet and the outlet through which the cooling fluid flows in a direction from the inlet to the outlet, is disclosed. The cooling duct has a first and a second heat transfer arrangement, which each extend along the direction of flow and are designed to transfer heat from the cooling fluid to the stator housing. The first heat transfer arrangement is arranged in a first section of the cooling duct and the second is arranged in a second section that is on the inlet side with respect to the first section. The first heat transfer arrangement in the first section creates a larger heat transfer area for the cooling fluid per unit of length based on the direction of flow than the second in the second section.