Rotating Electrical Machine Junction Conductor Radial Compactness
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Solution Overview
Problem
Existing rotary electric machines have a large radial dimension due to the placement of feeder terminals radially outward of the stator holder, which increases the motor's size.
Innovation Solution
The rotary electric machine design includes a junction conductor that positions electric power line joints radially inward of the stator's outer circumferential surface, reducing the radial dimension by shifting these joints and using bent plate-like members to maintain insulation and prevent dimension increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If feeder terminals are disposed radially outward of the stator holder, then electrical connection is simplified, but the radial dimension of the motor is increased
Solution Approach 1:
The patent repositions the electric power line joints from the radial direction to the axial direction by using a junction conductor that extends in the axial direction. This dimensional shift allows the joints to be positioned radially inward of the stator's outer circumferential surface, thereby reducing the radial dimension while maintaining electrical connection functionality.
Solution Approach 2:
The junction conductor acts as an intermediary component that connects the coils to the external electric power lines. It includes coil joints connected to the coils, electric power line joints connected to the external power lines, and a junction extending in the axial direction to couple these joints, enabling flexible positioning of the power line joints radially inward of the stator.
2Length of moving object
If electric power line joints are positioned radially inward of the stator, then radial dimension is reduced, but assembly difficulty increases
Solution Approach 1:
The junction conductor is designed to extend in the axial direction, allowing the electric power line joints to be positioned radially inward of the stator while remaining accessible from the axial direction for assembly. This axial extension provides a pathway for connecting components without requiring radial access.
Solution Approach 2:
The junction conductor is divided into functional segments: coil joints connected to the coils, electric power line joints connected to external power lines, and a junction portion extending in the axial direction. This segmentation allows each part to be positioned optimally, with power line joints radially inward for compactness while maintaining assembly accessibility.
Data Source
AI summary
A relay conductor of a rotating electrical machine is provided with: a coil connector that is connected to a coil on one side of a rotating shaft and further to the outside in the radial direction than the coil; a power line connector that is connected to an external power line on the other side of the rotating shaft; and relays that extend in the axial direction of the rotating shaft, and link the coil connector and the power line connector. At least a portion of the power line connector is positioned closer to the inner diameter side of the rotating electrical machine than the outer peripheral surface of a stator.