Segmented Electric Machine Active Parts
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Solution Overview
Problem
Large electrical machines for mill drives and wind turbines require complex and time-consuming on-site assembly of segmented units, leading to increased commissioning time and costs due to the need for electrical connections across segment boundaries.
Innovation Solution
The method involves forming ring-shaped active parts with grooves for electrical conductors, isolating and impregnating them, and connecting them to segment busbars before transport, allowing for modular assembly and operation, reducing assembly time and costs by enabling pre-connection and insulation of conductors during manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If electrical machines are divided into segments for transport, then logistical constraints are satisfied, but electrical connection of segments becomes time-consuming and complex
Solution Approach 1:
The patent applies preliminary action by pre-inserting and pre-connecting hinged coils across segment boundaries at the manufacturing site before transport. The coils are pre-positioned in grooves that extend through segment boundaries, and electrical connections are pre-established. This eliminates the need for time-consuming on-site electrical connections, reducing commissioning time while maintaining transportability of segmented machine parts.
2Reliability
If hinged coils are inserted and connected at installation site, then electrical connection across segment boundaries is achieved, but assembly complexity and costs increase
Solution Approach 1:
The patent applies preliminary action by pre-inserting and pre-connecting hinged coils across segment boundaries at the manufacturing site before transport. The coils are pre-positioned in grooves that extend through segment boundaries, and electrical connections are pre-established. This eliminates the need for time-consuming on-site electrical connections, reducing commissioning time while maintaining transportability of segmented machine parts.
3Loss of time
If electrical conductors are connected before transport, then assembly time at installation site is reduced, but insulation protection during transport becomes critical
Solution Approach 1:
The patent applies beforehand cushioning by providing robust insulation layers on electrical conductors before transport. The insulation includes multiple layers (first and second insulation layers) that protect the conductors from mechanical damage, moisture, and environmental factors during transport and storage. This preemptive protection prevents insulation damage that could occur during handling and transport of pre-connected segments.
Data Source
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AI summary
The invention relates to a method for producing an annular active part of an electric machine. The active part has ring segment-shaped sections (1) with grooves (2) for receiving electric conductors (3). The invention further relates to such a ring segment-shaped section (1), an electric machine with such a section (1), and a mill with such an electric machine. Lastly, the invention relates to a service method for such an electric machine or such a mill. The aim of the invention is an inexpensive assembly of an electric machine. This is achieved by, among others, the following method steps: - forming sections (1) with the grooves (2), - providing at least two, preferably three, galvanically separated electric conductors (3), each electric conductor (3) being designed so as to be arrangeable in at least two different grooves (2) of each section (1) such that the electric conductors run in opposite directions, - insulating each electric conductor (3) with a respective electrically insulating insulation layer (4), - impregnating each insulation layer (4) of each electric conductor (3) with an impregnating agent, - introducing each insulated and impregnated electric conductor (3) into the at least two different grooves (2) of each section (1), - transporting each section (1) together with each electric conductor (3) introduced into the section to an assembly and/or operating location of the electric machine, - and assembling the annular active part by joining at least two of the sections (2) by means of at least one respective connection (5).