End Winding Cooling via Inter-Wire Passages
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Solution Overview
Problem
Existing cooling systems for electromechanical rotary machines, such as electric motors, fail to effectively cool the inner portion of end winding coils, leading to overheating and reduced operational life, especially under heavy loads and high ambient temperatures.
Innovation Solution
A rotary cooling system is designed with a plurality of wires coiled around a stator tooth and a passage between them, allowing a pumping device to circulate cooling fluid and direct it towards the end windings, while spacers made of nonconductive materials like phenolic polymer are used to create channels for enhanced cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If passages are formed between wires coiled around stator teeth, then cooling effectiveness of inner portions is improved, but device complexity increases
Solution Approach 1:
The cooling passages are merged with the existing wire coil structure itself. The passages are formed between the wires that are already coiled around the stator teeth, combining the structural and cooling functions into a single integrated component rather than adding separate cooling infrastructure
Solution Approach 2:
The wire coil structure serves dual purposes: it provides the electrical winding function and simultaneously creates the cooling passages when spaces are maintained between adjacent wires. The structure that carries the electrical current also provides the thermal management pathway
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 solution effectively cools the inner portion of end winding coils, preventing overheating and extending the operational life of electromechanical rotary machines by ensuring efficient heat dissipation, even under heavy loads and high temperatures.
Implementation Method 1
A plurality of wires is coiled around at least one stator tooth. A passage extends between the plurality of wires for a pumping device to pump a cooling fluid
Data Source
AI summary
A rotary cooling system is provided that includes a stator having at least one tooth and a plurality of wires coiled around the tooth and a passage extending between the plurality of wires.