Disk Motor Stator Cooling Channels for Direct Liquid Heat Exchange
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Solution Overview
Problem
Conventional liquid cooling systems for disc electric motors operate in an external mode, leading to low cooling efficiency and reduced service life due to indirect contact of the coolant with the to-be-cooled parts.
Innovation Solution
A cooling structure with baffles and oil guide grooves forms circulation channels that allow liquid refrigerant to directly contact the stator core for heat exchange, enhancing heat dissipation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If liquid cooling system operates in external cooling mode with indirect contact, then device complexity is reduced, but cooling efficiency deteriorates
Solution Approach 1:
The cooling system is segmented into multiple independent circulation channels formed by baffles within the stator core. Each channel provides a dedicated path for liquid refrigerant to flow through, ensuring efficient heat exchange without requiring complex external cooling structures. This internal segmentation resolves the contradiction by achieving high cooling efficiency through simple, integrated channel design.
Solution Approach 2:
The circulation channels are nested within the stator core structure itself, with baffles and oil guide grooves integrated into the existing motor components. This nesting approach allows the cooling system to occupy minimal additional space while achieving direct contact cooling, thereby maintaining device simplicity while dramatically improving cooling efficiency compared to external systems.
2Loss of energy
If liquid refrigerant directly contacts stator core, then heat dissipation efficiency is improved, but device complexity increases
Solution Approach 1:
The cooling structure is merged with the stator core by integrating circulation channels, baffles, and oil guide grooves directly into the stator assembly. This combination eliminates the need for separate external cooling components, achieving direct contact heat exchange while maintaining a simple, unified structure that does not increase overall device complexity.
Solution Approach 2:
The stator core serves dual functions: electromagnetic function and heat dissipation function. By incorporating circulation channels and baffles into the stator, it becomes both the electromagnetic component and the cooling structure, eliminating the need for dedicated cooling components and thereby achieving high heat dissipation efficiency without increasing device complexity.
3Reliability
If multiple circulation channels are formed with baffles, then cooling efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The baffles and oil guide grooves are pre-formed or pre-assembled into the stator core structure before final assembly. This preliminary preparation allows the circulation channels to be established in advance, simplifying the overall assembly process and reducing manufacturing complexity while maintaining the benefits of multiple efficient cooling channels.
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 direct contact of liquid refrigerant with the stator core reduces temperature and prolongs the service life of the disc electric motor by improving heat dissipation.
Implementation Method 1
the liquid refrigerant sequentially enters the multiple circulation channels from the liquid inlet, and contacts directly with the outer side of the stator core or the inner side of the stator core or the oil guide groove through the circulation channels for heat exchange
Implementation Method 2
the liquid refrigerant can fully and directly contact the stator core for heat exchange to reduce the temperature of the stator core, thereby improving the heat dissipation efficiency
Data Source
AI summary
A cooling structure for a disk electric motor, and a disk electric motor are provided. The cooling structure includes: a stator core, a stator housing, multiple first baffles and multiple second baffles. Multiple coils are arranged on the stator core, and there is a gap between adjacent ones of the coils; a stator housing enclosing two end faces of the stator core, where a first cavity is defined by the stator housing and an outer side of the stator core, a second cavity is defined by the stator housing and an inner side of the stator core, where the first cavity and the second cavity are in communication with each other through the gap, and a liquid inlet and a liquid outlet which are in communication with the first cavity are arranged on the stator housing.