Stator Heat Conduction via Segmented Outer Cylinder
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Solution Overview
Problem
Existing stators face challenges in preventing deformation and effectively dissipating heat generated by coils during motor operation.
Innovation Solution
A stator design featuring a cylindrical back yoke with radially projecting teeth, coils wound around these teeth, and heat conducting parts that contact both the outer cylinder and coil ends, along with connecting parts and optional heat dissipating fins or coolant paths, enhances heat dissipation and prevents deformation of the outer cylinder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the outer cylinder is shrink fit to fasten it to the stator core, then the stator core deformation is prevented, but the heat dissipation from the coils is insufficient
Solution Approach 1:
The heat conducting part is divided into multiple segments corresponding to different coil positions, allowing heat to be conducted from multiple coil ends to the outer cylinder simultaneously, improving overall heat dissipation while maintaining the structural integrity provided by the shrink-fit outer cylinder
Solution Approach 2:
The heat conducting part acts as an intermediary component between the coil ends and the outer cylinder, transferring heat from the coils through thermal conduction to the outer cylinder which then dissipates heat to the surrounding environment, thus solving the heat dissipation insufficiency without affecting the deformation prevention function
2Temperature
If heat conducting parts are added to contact the coils and outer cylinder, then heat dissipation is improved, but the device complexity increases
Solution Approach 1:
The heat conducting part serves multiple functions: it conducts heat from the coil ends, provides structural support to maintain coil positioning, and enhances the thermal coupling between the coils and outer cylinder. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity
Solution Approach 2:
The heat conducting part is integrated with the outer cylinder structure, merging the heat conduction function with the existing structural component. This integration approach adds heat dissipation capability while minimizing the increase in overall device complexity by utilizing the outer cylinder as both a structural and thermal management component
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 improves heat dissipation from the coils, reduces the risk of outer cylinder deformation, and enhances the overall cooling efficiency of the stator.
Implementation Method 1
a heat conducting part which contacts an inner circumferential surface of the outer cylinder and a coil end of the coil
Data Source
AI summary
A stator which prevents deformation of component elements of the stator and which effectively removes heat generated by coils at the time of operation. The stator of a motor comprises a stator core having a cylindrical back yoke and teeth projecting out from the back yoke to the inside in the diametrical direction, coils wound around the teeth, an outer cylinder surrounding the back yoke, and heat conducting parts abutting against both an inner circumferential surface of the outer cylinder and coil ends of the coils.