Motor Case Cooling Channel Segmentation for Compact Thermal Management
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Solution Overview
Problem
Existing motor designs face challenges in efficient cooling while minimizing the increase in motor volume, as annular rings for cooling can limit discharge points and increase the motor's size.
Innovation Solution
A motor design that includes a cooling medium channel and discharge portions in the motor case surface, allowing flexible pattern design for efficient cooling without significantly increasing space, with channels and discharge holes optimized for specific cooling needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If annular rings are placed in the motor case for cooling, then cooling function is provided, but the motor volume increases and the number of discharge positions is limited
Solution Approach 1:
The cooling system is segmented into multiple independent discharge portions (first discharge portion and second discharge portion) located at different positions on the motor case. This allows the cooling function to be distributed across multiple locations rather than requiring a single large annular ring, thereby improving cooling efficiency without significantly increasing motor volume.
Solution Approach 2:
The discharge portions are arranged in different axial positions and radial locations on the motor case, utilizing three-dimensional space more effectively. This dimensional distribution allows multiple discharge points without requiring additional radial space, thus providing comprehensive cooling coverage while maintaining compact motor dimensions.
2Temperature
If annular rings are placed in the motor case for cooling, then cooling function is provided, but the number of discharge positions is limited
Solution Approach 1:
The cooling system is segmented into multiple independent discharge portions (first discharge portion and second discharge portion) located at different positions on the motor case. This allows the cooling function to be distributed across multiple locations rather than requiring a single large annular ring, thereby improving cooling efficiency without significantly increasing motor volume.
Solution Approach 2:
The motor case serves multiple functions: it provides structural housing and simultaneously acts as a cooling medium channel and discharge structure. The case is designed with integrated cooling channels and multiple discharge portions, allowing it to perform both containment and thermal management functions, thereby increasing design flexibility without adding separate cooling components.
3Temperature
If cooling medium channels are added to the motor case, then cooling efficiency is improved, but the device complexity increases
Solution Approach 1:
The cooling medium channels are merged with the motor case structure itself, forming an integrated design where the case walls serve as channel boundaries. This eliminates the need for separate channel components and reduces assembly complexity while maintaining effective cooling pathways from the cooling medium supply to multiple discharge portions.
Solution Approach 2:
The motor case serves multiple functions: it provides structural housing and simultaneously acts as a cooling medium channel and discharge structure. The case is designed with integrated cooling channels and multiple discharge portions, allowing it to perform both containment and thermal management functions, thereby increasing design flexibility without adding separate cooling components.
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 design achieves efficient cooling of motor components like coil ends and bearings while reducing the required space, maintaining compactness, and improving lubrication and cooling medium flow.
Implementation Method 1
The cooling medium channel includes at least a first channel through which a cooling medium flows in a vertical up-down direction. The cooling medium is discharged in the axial direction from the cooling medium channel through the discharge portions toward inside of the motor case.
Implementation Method 2
The design achieves efficient cooling of motor components like coil ends and bearings while reducing the required space
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A motor (2) includes: a shaft (4); a rotor (6) fixed to the shaft (4); a stator (8) having an annular shape about a central axis of the rotor (6); and a motor case (20) that houses the rotor (6) and the stator (8). The motor case (20) includes a cooling medium channel (40) and discharge portions (50) in a surface of the motor case (20) that faces the stator (8) in an axial direction of the central axis. The cooling medium channel includes at least a first channel (42) through which a cooling medium flows in a vertical up-down direction. The cooling medium is discharged in the axial direction from the cooling medium channel (40) through the discharge portions (50, 150) toward the inside of the motor case (20).