Rotating Electrical Machine Core Supporter with Slit Insulation
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Solution Overview
Problem
Rotating electrical machines face challenges in reducing circulating currents and maintaining high stiffness, which can lead to decreased dynamic torque and increased noise, especially when using pressed powder cores that have lower mechanical strength.
Innovation Solution
The implementation of a core supporter with a slit-shaped insulating section and an insulating sheet to electrically isolate the stator core from the base, combined with a gate-type or semi-circular arc-shaped core supporter configuration, effectively suppresses circulating currents and enhances the mechanical stiffness of the stator core.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If pressed powder cores are used to support the stator core, then the mechanical strength is improved, but circulating currents are generated that reduce dynamic torque and increase noise
Solution Approach 1:
An insulating section is introduced as an intermediary element between the pressed powder core and the stator core. This insulating section prevents direct electrical contact, thereby blocking the circulating current path while maintaining the mechanical support function of the pressed powder core structure.
2Device complexity
If the stator core is directly supported by the base, then the device complexity is reduced, but the stiffness and dynamic torque performance deteriorate
Solution Approach 1:
The support structure is segmented into multiple functional components: the base, the pressed powder core, and the insulating section. This segmentation allows each component to perform its specific function - the base provides mounting, the pressed powder core provides mechanical support and positioning, and the insulating section provides electrical isolation - thereby achieving high stiffness without excessive overall complexity.
3Object-generated harmful factors
If insulating sections are added to suppress circulating currents, then the harmful factors are reduced, but the device complexity increases
Solution Approach 1:
The insulating section is merged with the pressed powder core structure, forming an integrated assembly where the insulating section serves as both an electrical isolator and a structural component. This merging reduces the number of separate parts and simplifies assembly, thereby minimizing the increase in device complexity while effectively suppressing circulating currents.
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 the performance of rotating electrical machines by reducing circulating currents, maintaining high stiffness, and minimizing noise, thereby enhancing dynamic torque and overall efficiency, especially at high speeds.
Implementation Method 1
a core supporter configured to support the stator core, the core supporter including a slit-shaped insulating section extending in an axial direction of the shaft
Implementation Method 2
the core supporter includes a first insulating section extending in an axial direction of the shaft
Implementation Method 3
An electromagnetic motor requires high performance for reasons such as energy saving, CO2 reduction
Data Source
AI summary
According to one embodiment, a rotating electrical machine includes a shaft, an annular winding, a stator, a rotor, and a core supporter. The annular winding extends in a rotation direction of the shaft. The stator core includes a plurality of stator magnetic poles. The plurality of stator magnetic poles are arranged along the winding. The rotor core includes a plurality of rotor magnetic poles. The plurality of rotor magnetic poles are configured to face the plurality of stator magnetic poles. The core supporter is configured to support at least one of the stator core and the rotor core. The core supporter includes a first insulating section. The first insulating section extends in an axial direction of the shaft. The first insulating section has a slit-shape.