Stator Core Cooling Passages for Compact E-Machine Thermal Control
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Solution Overview
Problem
E-machine systems face challenges in providing effective cooling while minimizing increases in cost, part count, device complexity, size, and weight, necessitating a compact and efficient cooling solution.
Innovation Solution
The stator core is designed with an outer coolant groove and yoke flow channel that connects to a fluid coolant system, allowing coolant to flow through the stator core and distribute cooling efficiently, while maintaining a smooth and continuous inner radial surface for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling features are added to e-machine systems, then cooling effectiveness is improved, but cost, part count, device complexity, size, and weight increase
Solution Approach 1:
The cooling flow passages are integrated directly into the stator core structure, merging the cooling system with the stator core. This eliminates the need for separate cooling components and reduces overall system complexity while maintaining effective cooling of the e-machine system
Solution Approach 2:
The stator core serves dual functions: it provides the necessary electromagnetic structure and simultaneously acts as the cooling system through its integrated flow passages. This multi-functionality reduces the number of separate components needed in the system
2Temperature
If cooling features are added to e-machine systems, then cooling effectiveness is improved, but manufacturing cost increases
Solution Approach 1:
By integrating the cooling flow passages into the stator core, the invention reduces the total part count and simplifies assembly processes. This integration leads to lower manufacturing costs despite the added cooling functionality
3Temperature
If cooling features are added to e-machine systems, then cooling effectiveness is improved, but device size and weight increase
Solution Approach 1:
The cooling passages are embedded within the existing stator core structure rather than adding external cooling components. This integration approach minimizes additional weight while providing effective cooling throughout the e-machine system
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 provides effective cooling to the e-machine system, reducing manufacturing complexity and costs, and results in a compact, low-weight package with enhanced manufacturing efficiency.
Implementation Method 1
The outer coolant groove is configured to receive coolant of the fluid coolant system and provide the coolant to the yoke flow channel
Implementation Method 2
The yoke flow channel provides the coolant to at least one of the first end and the second end
Implementation Method 3
provides effective cooling to the e-machine system
Data Source
AI summary
A stator core includes a first end and a second end separated along an axis. The stator core includes an inner radial surface and an outer radial surface. Also, the stator core includes an outer coolant groove defined on the outer radial surface of the stator core. The outer coolant groove extends about the axis. Additionally, the stator core includes a yoke flow channel extending through the stator core along the axis. The yoke flow channel is in fluid communication with the outer coolant groove. Furthermore, the outer coolant groove configured to receive coolant of the fluid coolant system and provide the coolant to the yoke flow channel, which provides the coolant to at least one of the first end and the second end.