Rotor Separating Device for Electrical Machine Stability
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Solution Overview
Problem
Existing electrical machine rotors face challenges in mechanical stabilization against radial forces, particularly centrifugal forces, which are costly and complex to address using solid casting or additional components like reinforcing rings and tension rods.
Innovation Solution
A rotor design featuring a separating device with form-fit and/or force-fit connections between two parts, integrating shape retention and mechanical support for exciter windings, allowing for axial insertion and connection between rotor legs, providing stability under high mechanical loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If solid casting is used for mechanical stabilization, then mechanical stability is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The separating device is divided into two separate parts that are assembled together, allowing for simpler manufacturing of each individual part while achieving the same mechanical stabilization function that would require complex solid casting
Solution Approach 2:
The separating device combines multiple functions (electrical isolation, shape retention, and mechanical stabilization against radial forces) into a single integrated component structure, eliminating the need for separate casting operations
2Stability of the object's composition
If additional components like reinforcing rings and tension rods are used, then mechanical stability is improved, but device complexity and installation complexity increase
Solution Approach 1:
The separating device integrates the functions of multiple separate components (reinforcing rings, tension rods, and separating elements) into a single unified structure, reducing the total number of parts while maintaining mechanical stability
Solution Approach 2:
The separating device performs multiple functions simultaneously: it provides electrical isolation between rotor legs, maintains the shape of exciter windings, and stabilizes the rotor against radial centrifugal forces, eliminating the need for dedicated reinforcing components
3Stability of the object's composition
If additional components like reinforcing rings and tension rods are used, then mechanical stability is improved, but installation complexity and time increase
Solution Approach 1:
The separating device is segmented into two parts that can be separately manufactured and then quickly assembled, reducing installation time compared to complex multi-component systems that require precise alignment and multiple fastening operations
Solution Approach 2:
The two parts of the separating device are designed to be pre-manufactured with connection features that enable quick assembly, reducing on-site installation time and complexity
Data Source
AI summary
Rotor for an electrical machine has a rotor core with a plurality of radially outwardly extending rotor legs, a number of exciter windings corresponding to the number of rotor legs, each wound around one of the rotor legs, and a separating device, having a number of separating portions corresponding to the number of rotor legs, which are arranged between a respective pair of adjacent exciter windings and extend axially between two opposing end faces of the rotor, a first annular connecting portion which connects together the separating portions at one of the end faces, and a second annular connecting portion which connects together the separating portions at the other of the end faces. The separating device is formed by a first part and by a second part which are joined together by means of a form-fit and/or force-fit connection, wherein the first part comprises at least the first connecting portion and at least partially the separating portions, and the second part comprises at least the second connecting portion.