Rotary Machine Terminal Box Recessed in Stator Housing
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Solution Overview
Problem
Rotary dynamoelectric machines face challenges in maintenance and connection work due to the need for large radial installation space, which compromises their compactness, especially in applications like automotive and mining where space is limited and additional electric components hinder access.
Innovation Solution
A rotary dynamoelectric machine design with a terminal box recessed into the stator housing, allowing winding connection lines to be contacted with external lines within the machine, enabling easy maintenance and replacement without disassembling the drive system, and incorporating a web server for data forwarding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If connection lines are positioned in radial alignment above the terminal box, then connection work can be performed, but a large radial installation space is required which reduces compactness
Solution Approach 1:
The terminal box is moved from a radial position to an axial position between the stator and end shield. This dimensional change allows connection lines to be accessed axially rather than radially, enabling connection work while maintaining compact radial dimensions of the drive system.
2Area of stationary object
If the terminal box is recessed into the stator housing, then radial installation space is minimized, but access to maintenance work becomes more difficult
Solution Approach 1:
The terminal box is designed as a separate, accessible component recessed into the stator housing. The end shield can be removed to provide access to the terminal box for maintenance work, while the recessed design maintains compact radial dimensions when assembled.
3Reliability
If manual insulation and impregnation of winding connection lines are performed, then insulation quality can be ensured, but manufacturing complexity and error rate increase
Solution Approach 1:
The winding connection lines are impregnated together with the windings in a single manufacturing step. This merging of processes eliminates separate manual insulation and impregnation steps, reducing manufacturing complexity and error rates while ensuring consistent insulation quality.
Data Source
AI summary
A rotary dynamoelectric machine includes a single- or multi-phase winding system, which is arranged in a stator and has winding connection lines which are guided into a terminal box for contacting external connection lines. The terminal box is located in a region of an end side of the stator, is recessed in a housing of the stator, and is arranged axially between the stator and an end shield.