Stator Cooling Slot Structure With Sealed Coolant Passage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motor stators face challenges in heat dissipation, leading to high costs and low reliability, which affect the performance and working reliability of electric vehicles.
Innovation Solution
A stator design with a stator core and seal kit that separates coolant flow passages from coil slots, allowing independent coolant and coil accommodation, reducing flow resistance and enabling direct contact for efficient heat dissipation while minimizing impact on electromagnetic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If coolant flows through the coil slot for heat dissipation, then heat dissipation function is achieved, but flow resistance increases and fluidity is challenged
Solution Approach 1:
The opening slot is segmented into two independent functional spaces: the coil slot for accommodating the stator coil and the flow passing slot for coolant flow. This segmentation allows the coolant to flow through a dedicated passage without being constrained by the narrow coil slot, thereby reducing flow resistance while maintaining effective heat dissipation through direct contact with the stator core.
2Temperature
If coolant flow passage is integrated with coil slot, then heat dissipation is achieved, but processing complexity and costs increase
Solution Approach 1:
By segmenting the opening slot into distinct coil slot and flow passing slot regions, the patent simplifies the manufacturing process. The seal kit is connected to the inner wall of the opening slot and cooperates with the flow passing slot inner wall to form the flow passing passage, eliminating the need for complex flow guidance structures within the coil slot and reducing overall processing complexity.
Solution Approach 2:
The seal kit serves as an intermediary element that is connected to the inner wall of the opening slot and cooperates with the inner wall of the flow passing slot to form the flow passing passage. This intermediary structure simplifies the overall design by using the seal kit's inherent sealing function to also define the coolant flow path, reducing the need for additional complex flow guidance components.
3Reliability
If seal kit and flow passing slot inner wall form flow passing passage, then heat dissipation reliability is ensured, but structure complexity increases
Solution Approach 1:
The seal kit performs multiple functions: it provides sealing between the stator core and stator coil, and simultaneously cooperates with the flow passing slot inner wall to form the flow passing passage for coolant flow. This multi-functionality ensures reliable heat dissipation without significantly increasing structural complexity, as the seal kit's dual role leverages existing components rather than adding separate dedicated structures.
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
Ensures effective heat dissipation and high reliability with reduced processing and material costs, facilitating high-speed motor operation and improved production efficiency.
Implementation Method 1
when the coolant flows in the flow passing passage, heat can be fully dissipated for the stator core due to direct contact between the coolant and the stator core
Data Source
AI summary
A stator includes a stator core and a seal kit. The stator core includes a yoke part and a plurality of tooth parts. A tooth root of the tooth part is connected to the yoke part. A tooth top of the tooth part is away from the yoke part. An opening slot is formed between two adjacent tooth parts. The opening slot includes a coil slot and a flow passing slot that communicate with each other. The coil slot extends from the tooth top to the tooth root. The coil slot is configured to accommodate a stator coil. The flow passing slot extends from the tooth root to the yoke part. The seal kit is connected to an inner wall of the opening slot. The seal kit and the inner wall of the flow passing slot jointly form a flow passing passage for a coolant to flow through.