Stator Core Cooling Flow Path for Compact Motor Coil Cooling
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Solution Overview
Problem
Existing motor cooling systems require a separate cooling guide, which increases assembly and economic inefficiencies and motor size due to the need for a flow path on the outer circumferential surface, affecting cooling efficiency and lifespan.
Innovation Solution
A stator with a cooling flow path integrated inside the core, allowing direct spraying of cooling oil to the coil without a cooling guide, featuring an annular outer flow path with inlets and outlets strategically positioned to reduce motor size and enhance assemblability and economic efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate cooling guide structure is used to spray cooling oil to the coil, then cooling efficiency is improved, but device complexity and motor size increase
Solution Approach 1:
The cooling guide structure is merged with the stator core by integrating the cooling flow path directly into the core's yoke and tooth portions. The inlet is disposed along the outer circumferential surface and the outlet is disposed in the yoke or tooth, eliminating the need for separate cooling guide components while maintaining effective cooling oil delivery to the coil.
2Reliability
If a separate cooling guide structure is used, then cooling function is improved, but assembly efficiency decreases
Solution Approach 1:
The cooling flow path is integrated into the stator core structure, with the inlet disposed along the outer circumferential surface and the outlet disposed in the yoke or tooth portion. This integration eliminates separate cooling guide components and reduces the number of assembly steps, thereby improving assembly efficiency while maintaining effective cooling function.
3Reliability
If a flow path is disposed on the outer circumferential surface of the core, then cooling effectiveness is improved, but motor volume increases
Solution Approach 1:
The cooling flow path is nested within the stator core structure itself. The inlet is disposed along the outer circumferential surface and the outlet is disposed in the yoke or tooth portion, allowing the cooling path to be contained within the existing core geometry without requiring additional external space, thereby maintaining compact motor volume while achieving effective 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
This design improves cooling efficiency, reduces motor size, and simplifies assembly by eliminating the need for a separate cooling guide, while allowing for easier adjustment of the cooling structure during design.
Implementation Method 1
a cooling flow path disposed inside the core, wherein at least one inlet of cooling fluid is disposed along an outer circumferential surface of the core, and at least one outlet of cooling fluid connected to the at least one cooling fluid inlet is disposed in the yoke or the tooth portion
Data Source
AI summary
A stator comprises: a core including a yoke having an annular, a teeth extending inwardly from the yoke and radially disposed, and a shoe disposed at an end of each tooth, and a cooling flow path disposed inside the core, at least one cooling fluid inlet is disposed along an outer circumferential surface of the core, and at least one cooling fluid outlet connected to the at least one cooling fluid inlet is disposed in the yoke or the teeth in an upper surface of the core.