Stator Guide Member for Terminal Line Routing and Radial Size Reduction

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Solution Overview

Problem

Conventional stators face challenges in managing the radial expansion of terminal lines, leading to increased size and complexity in motor designs, particularly when multiple phase coils are wound around a stator core with different systems connected to distinct circuits.

Innovation Solution

A guide member is positioned on one side of the stator core in the axial direction, guiding terminal lines in the circumferential direction and collecting them at overlapping positions, which reduces radial expansion and simplifies connections by collecting terminal lines of different systems at one place, allowing for easier circuit integration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If terminal lines of multiple phase coils are managed without a guide member, then the stator structure is simpler, but the radial size increases and wiring complexity increases

Engineering Contradiction:

Improvewiring complexityVSAvoidradial size

Core Design Contradiction:

Device complexityVSLength of stationary object

Solution Approach 1:

A guide member is introduced as an intermediary component between the coils and the terminal lines. This guide member includes a guide portion that directs terminal lines in the circumferential direction and a collecting portion that gathers them, thereby mediating the connection process and reducing both radial expansion and wiring complexity

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

Instead of allowing terminal lines to extend radially outward from the coils, the guide member redirects them in the circumferential direction (another dimension). This dimensional change in routing prevents radial size increase while maintaining electrical connectivity

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Ease of operation

If terminal lines of different systems are collected at separate locations, then system isolation is maintained, but the overall device size and connection complexity increase

Engineering Contradiction:

Improvecircuit integrationVSAvoiddevice footprint

Core Design Contradiction:

Ease of operationVSArea of stationary object

Solution Approach 1:

The guide member merges the routing paths of terminal lines from different systems (first and second three-phase windings) into a single collecting portion. This consolidation allows all terminal lines to be gathered at one location, simplifying circuit integration while maintaining system independence through proper routing

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS11482906B2Stator

Publication Date: 2022.10.25 DENSO CORP

AI summary

In a stator, coils of multiple phases are wound around a stator core via an insulator. A guide member is provided on one side of the stator core in the axial direction and guides the terminal line of the coil in the circumferential direction at a position overlapping the coil in the axial direction. The coils have coils of different systems connected to circuits of different systems. The guide member has a collecting portion that collects the terminal lines of the different systems at one place in the circumferential direction.