Rotor Cooling Tubes for Electric Machine Heat Dissipation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cooling assemblies for electric machines face challenges in efficiently managing heat dissipation, particularly in high-power applications, leading to overheating and increased weight and size due to the need for cooling jackets and heat exchangers.
Innovation Solution
The proposed cooling assemblies incorporate a rotor with a tube configuration between rotor poles and windings, utilizing a refrigerant or dielectric fluid to enhance heat transfer, along with thermal interface materials and heat-dissipating plates, allowing for efficient heat dissipation without a cooling jacket or heat exchanger, thereby reducing weight and size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling jackets and heat exchangers are used for cooling electric machines, then heat dissipation capability is improved, but weight and size increase
Solution Approach 1:
The patent extracts the cooling function from traditional external cooling jackets and heat exchangers, and integrates it directly into the rotor structure through cooling channels formed within the rotor core and rotor poles. This eliminates the need for separate cooling components, thereby reducing weight while maintaining heat dissipation capability
Solution Approach 2:
The patent merges the cooling system with the rotor structure by forming cooling channels within the rotor core and rotor poles. The cooling function is combined with the mechanical rotor structure, eliminating separate cooling components and reducing overall weight
2Temperature
If cooling jackets and heat exchangers are used for cooling electric machines, then heat dissipation capability is improved, but device complexity increases
Solution Approach 1:
The patent merges the cooling system with the rotor structure by forming cooling channels within the rotor core and rotor poles. This integration simplifies the overall device structure by eliminating separate cooling jackets and heat exchangers, reducing device complexity while maintaining effective heat dissipation
3Power
If higher power levels are achieved in electric machines, then power output is improved, but heat generation increases导致 overheating
Solution Approach 1:
The patent segments the cooling system into multiple cooling channels distributed within the rotor core and rotor poles. This segmentation allows heat to be dissipated locally at multiple points throughout the rotor structure, effectively managing heat generation from high-power operations and preventing overheating
Solution Approach 2:
The patent implements local cooling by forming cooling channels within the rotor core and rotor poles where heat is generated. This local quality approach ensures that cooling is applied precisely where needed, enabling the machine to operate at higher power levels without overheating
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 configuration effectively lowers operating temperatures, enabling higher power levels without overheating, decreases weight and size, and optimizes fluid cooling performance, while maintaining efficient heat transfer and thermal conductivity.
Implementation Method 1
a tube disposed between a rotor pole and the rotor winding associated with that rotor pole... fluid moving through the assembly (and through the tube)... effectively lowers operating temperatures
Implementation Method 2
thermal interface materials and heat-dissipating plates, allowing for efficient heat dissipation
Data Source
AI summary
Cooling assemblies, such as those configured to cool electric machines (e.g., electric motors and generators) and components of electric machines (e.g., rotors and stators).