Thermal Conductive Heat Dissipating Element for Electrical Machine Slots
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Solution Overview
Problem
Electrical machines face performance degradation, reduced power density, and reliability issues due to high temperatures, particularly in components like stators and rotors where ohmic losses generate heat that is poorly dissipated through insulation layers with low thermal conductivity.
Innovation Solution
Incorporating a heat dissipating element with thermally conductive materials having higher in-plane thermal conductivity than through-plane conductivity within the slots of electrical machine components, such as stators and rotors, to enhance heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insulation layers are used to protect conductors, then electrical insulation is improved, but thermal conductivity deteriorates
Solution Approach 1:
The slot is divided into multiple regions with different materials: insulation layers for electrical protection and thermally conductive material for heat dissipation. The heat dissipating element is segmented into multiple thermal pathways that conduct heat from different locations to cooling channels.
Solution Approach 2:
A thermally conductive material acts as an intermediary between the conductors and cooling channels, transferring heat efficiently while maintaining electrical insulation. The heat dissipating element serves as a mediator that bridges the thermal gap created by insulation layers.
2Reliability
If conventional insulation materials are used, then electrical protection is achieved, but thermal management deteriorates
Solution Approach 1:
The patent uses composite material structures combining electrical insulation layers with thermally conductive materials. The heat dissipating element is constructed from composite materials that provide both thermal conductivity and electrical insulation properties, allowing simultaneous achievement of electrical protection and thermal management.
3Temperature
If heat dissipating elements are added, then thermal conductivity is improved, but device complexity increases
Solution Approach 1:
The heat dissipating element serves multiple functions: it provides thermal conduction pathways, maintains electrical insulation, supports mechanical positioning of conductors, and facilitates cooling fluid flow. By integrating these functions into a single component, structural complexity is minimized while achieving effective thermal management.
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 effectively conducts heat away from hotspots, improving thermal management and reducing temperature-related performance issues in electrical machines.
Implementation Method 1
The heat dissipating element includes a thermally conductive material having an in-plane thermal conductivity higher than a through-plane thermal conductivity
Data Source
AI summary
A component of an electrical machine is disclosed. The component includes a core including a plurality of slots, a magnetic field-generating component disposed in at least one slot of the plurality of slots, and a heat dissipating element disposed in a slot of the plurality of slots, in contact with the magnetic field-generating component. The heat dissipating element includes a thermally conductive material having an in-plane thermal conductivity higher than a through-plane thermal conductivity.