Disc Motor Cooling Structure With Direct Coil Refrigerant Contact
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Solution Overview
Problem
Conventional liquid cooling systems for disc electric motors have low cooling efficiency due to indirect contact between the coolant and the heat-generating components, which affects the service life of the motor.
Innovation Solution
A cooling structure that includes a stator core with multiple stator units, a stator housing with liquid inlet and outlet channels, baffles to create separate cooling channels, and coils arranged for direct contact with the liquid refrigerant, allowing for efficient heat exchange and extended motor life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional liquid cooling system is used with indirect contact between coolant and heat-generating parts, then the structure is simpler to manufacture, but the cooling efficiency is low
Solution Approach 1:
The patent introduces a coolant distribution plate as an intermediary component that enables direct contact between the coolant and heat-generating parts (coils and stator core). The plate includes coolant channels that allow the coolant to flow directly over the coils and through the stator core, transforming the indirect cooling method into direct cooling while maintaining structural integrity and manufacturability
Solution Approach 2:
The cooling system is segmented into multiple independent cooling channels within the coolant distribution plate, allowing separate flow paths for different cooling zones. This segmentation enables optimized cooling for different heat-generating components (coils versus stator core) while maintaining overall system manufacturability through modular plate construction
2Reliability
If direct contact cooling is implemented between liquid refrigerant and heat-generating components, then the cooling efficiency is improved, but the device complexity increases
Solution Approach 1:
The coolant distribution plate serves multiple functions simultaneously: it acts as a structural support for the coils, provides coolant distribution channels for direct cooling, and facilitates heat transfer from both the coils and stator core. This multi-functionality reduces the need for separate cooling components, thereby limiting the increase in device complexity while achieving improved cooling efficiency
Solution Approach 2:
The patent merges the cooling function with the structural support function by integrating the coolant channels directly into the plate that supports the coils. This combination eliminates the need for separate cooling plates or housings, reducing overall device complexity while enabling direct contact cooling
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 cooling structure enhances heat dissipation efficiency by enabling direct contact between the liquid refrigerant and heat-generating components, thereby prolonging the service life of the disc electric motor.
Implementation Method 1
the liquid refrigerant exchanges heat with the first coil and the second coil at the outer side of the stator core
Implementation Method 2
liquid refrigerant can fully and directly contact and exchange heat with core heat-generating parts
Implementation Method 3
The liquid refrigerant in the first cooling channel exchanges heat with the first coil and the second coil
Data Source
AI summary
A cooling structure for a disc electric motor is provided, including a stator core, a stator housing, a first baffle, a second baffle, a first coil, a second coil, and a partitioner. The first coil and the second coil are arranged on each of stator units. First coils on adjacent stator units are in a close fit with each other, and second coils on the adjacent stator units are in a close fit with each other. The partition plate is interposed between the first coil and the second coil. A third cooling channel, through which a first cavity and a second cavity are communicated, is formed between the adjacent stator units.