Integrated Cooling Device for Electric Motor Heat Transfer
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Solution Overview
Problem
Existing cooling devices for electric motors driving charge air compressors of internal combustion engines are inefficient in heat transfer and stability, particularly in compact designs.
Innovation Solution
A one-piece cooling device housing with integrated tubes for fluid flow, featuring a spiral-shaped coil spring design made from high thermal conductivity materials, which is cast into the housing for improved integration and stability, enhancing heat transfer and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional cooling devices are used for electric motors, then assembly and installation are simpler, but heat transfer efficiency is insufficient
Solution Approach 1:
The cooling device merges the housing and cooling tubes into a single integrated component manufactured in one piece. This combining of previously separate parts (housing plus separate tubes) into one unified structure improves heat transfer efficiency while maintaining manufacturing simplicity through single-piece production methods
Solution Approach 2:
The cooling device utilizes composite material construction with sections of housing made from materials having different thermal conductivities. Specifically, certain sections use materials with higher thermal conductivity to enhance heat transfer in critical areas, while other sections use materials optimized for structural requirements, creating a functionally optimized composite structure
2Volume of moving object
If compact cooling device design is implemented, then space is saved, but stability is reduced
Solution Approach 1:
By merging the housing and cooling tubes into one integrated piece, the design eliminates gaps and connection points between separate components. This unified structure achieves compact dimensions while simultaneously improving stability through monolithic construction that prevents relative movement between parts
Solution Approach 2:
The cooling tubes are arranged in a three-dimensional configuration within the housing, with tubes extending in multiple directions and planes. This spatial arrangement maximizes cooling surface area within a compact volume while the integrated construction maintains structural stability across all dimensions
3Reliability
If separate tubes are used instead of integrated tubes, then assembly is easier, but sealing and tightness are compromised
Solution Approach 1:
The housing and cooling tubes are merged into a single manufactured piece, eliminating all connection interfaces between these components. This integration guarantees sealing and tightness by removing potential leak paths at joints, while the single-piece manufacturing process maintains ease of production through direct formation of the integrated structure
Solution Approach 2:
The cooling tubes are pre-formed as integral parts of the housing during the housing manufacturing process itself. This preliminary integration ensures proper positioning, sealing, and tightness are built into the structure from the outset, eliminating the need for separate assembly steps and subsequent sealing operations
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 improves heat transfer efficiency, stability, and compactness of the cooling device, allowing for effective cooling of electric motors while simplifying assembly and enabling the use of higher pressure cooling fluids.
Implementation Method 1
cooling fluid flows through the at least one tube to cool the electric motor
Data Source
Figure 1~2
AI summary
The present invention relates to a cooling device for an electric motor (20), in particular for driving a charge air compressor (30) of an internal combustion engine, wherein the cooling device has a housing (10) with a recess for at least partial reception of a rotor (22) of the electric motor, into which at least one tube (40) is integrated, which has at least one inlet (41) and at least one outlet (42).