Stator Core Support Device Insulating Ribs to Suppress Eddy Currents
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Solution Overview
Problem
In rotating electrical machines, the leakage of magnetic flux leads to eddy current loss, increased temperature, and reduced mechanical strength, which can cause vibration and efficiency issues, especially when trying to increase magnetic flux and compactness.
Innovation Solution
A stator core support device with insulating components that form closed circuit portions, preventing eddy currents by electrically insulating key members such as ribs, pressing rings, and spring rods, thereby reducing thermal expansion and maintaining mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If magnetic flux is increased to enhance power generation output, then power generation output is improved, but eddy current loss increases due to magnetic flux leakage
Solution Approach 1:
An insulating member is introduced as an intermediary between metallic components (ribs, pressing rings, support plates) that form closed circuit portions. This insulating member blocks the formation of eddy current paths while allowing the metallic components to maintain their structural and magnetic flux-conducting functions, thereby reducing eddy current loss without compromising power generation output
Solution Approach 2:
Insulating members are selectively placed only at specific locations where closed circuit portions form, rather than insulating all metallic components throughout the stator core support device. This localized insulation approach prevents eddy currents in critical areas while minimizing the impact on overall magnetic flux conduction and power generation performance
2Power
If magnetic flux is increased, then power generation output is improved, but temperature rises due to eddy current loss
Solution Approach 1:
The insulating member acts as a thermal barrier that interrupts the closed circuit portions through which eddy currents flow. By blocking these current paths, the insulating member prevents the conversion of electrical energy to thermal energy via eddy currents, thereby suppressing temperature rise while allowing continued operation at high power generation output levels
3Power
If magnetic flux is increased, then power generation output is improved, but mechanical strength decreases due to temperature rise
Solution Approach 1:
The insulating member prevents eddy current formation by blocking closed circuit portions, thereby preventing the temperature rise that would otherwise occur. By maintaining lower operating temperatures, the insulating member preserves the mechanical strength of metallic components (ribs, pressing rings, support plates) even when operating at increased power generation output levels
4Loss of energy
If insulating members are added to prevent eddy currents, then eddy current loss is reduced, but device complexity increases
Solution Approach 1:
Insulating members are placed only at specific strategic locations where closed circuit portions form among metallic components, rather than throughout the entire device. This selective placement minimizes the number of insulating members required while effectively blocking eddy current paths, thereby reducing eddy current loss with minimal increase in device complexity
Solution Approach 2:
The insulating members are divided into multiple discrete components positioned at different locations within the stator core support device. This segmentation allows for modular assembly and maintenance while effectively interrupting eddy current paths at multiple points, reducing overall eddy current loss without requiring a single complex insulating structure
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 solution effectively suppresses eddy current loss and temperature rise, enhancing the operational efficiency and reducing vibration in rotating electrical machines by preventing magnetic flux leakage and maintaining mechanical integrity.
Implementation Method 1
at least one insulating member is disposed between two metallic members among the plurality of ribs, the plurality of iron core pressing rings, and the plurality of iron core support plates
Implementation Method 2
the leakage of magnetic flux leads to eddy current loss... effectively suppresses eddy current loss and temperature rise
Implementation Method 3
a stator core support device including an elastic body such as a spring plate or a spring rod may be disposed between the stator core and the stator frame... a plurality of spring rods 36 extending in the axial direction to connect an iron core support plate 34 and the partition plate 35
Implementation Method 4
maintaining mechanical strength... suppressing eddy current loss and temperature rise... preventing thermal expansion and maintaining mechanical strength
Data Source
AI summary
A stator core support device according to an embodiment includes plural types of support members that support a stator core on a stator frame disposed radially outward. These support members are combined so as to form a closed circuit portion. Then, an insulating part for electrically insulating part of the closed circuit portion is provided.