Armature Winding Balance via Segmented Double Flyer Design

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Solution Overview

Problem

Existing armature winding methods face challenges in achieving rotational balance due to weight imbalances caused by differences in conductive wire weights used in windings, leading to vibrations during rotation, and require additional steps or tools for correction.

Innovation Solution

The armature is designed with windings divided into two groups wound at equal angular intervals without overlapping, using a double flyer armature winding machine to distribute weight evenly, ensuring the center of mass aligns with the rotational center, thereby eliminating the need for corrective materials or tools.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If the number of turns of each winding is adjusted to achieve weight balance, then the rotational balance is improved, but magnetic unbalance occurs due to difference in number of turns

Engineering Contradiction:
Improverotational balanceVSAvoidmagnetic unbalance
Core Design Contradiction:
Stability of the object's compositionVSObject-generated harmful factors

Solution Approach 1:

The windings are divided into two distinct groups: a first winding group where windings are arranged without overlapping at equal angular intervals, and a second winding group where windings are also arranged without overlapping at equal angular intervals. This segmentation allows each group to contribute equally to weight balance while maintaining uniform magnetic distribution across all windings.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent employs an asymmetric winding arrangement where the first and second winding groups are positioned at different angular locations around the armature core. This asymmetric distribution, combined with the equal angular spacing within each group, achieves overall weight balance while preventing magnetic unbalance through proper spatial arrangement.

Inventive Principle:
Principle #4Asymmetry

2Stability of the object's composition

If corrective material is applied or armature core is cut to adjust weight balance, then rotational balance is improved, but device complexity increases due to additional steps and tools

Engineering Contradiction:
Improverotational balanceVSAvoidmanufacturing process complexity
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The winding arrangement is designed in advance to inherently achieve weight balance. By pre-configuring the first and second winding groups with equal angular intervals and non-overlapping arrangements, the patent eliminates the need for post-winding corrective actions such as adding corrective material or cutting the armature core.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The winding structure itself serves the dual function of electrical connection and weight balancing. The symmetric distribution of the first and second winding groups automatically achieves rotational balance without requiring external corrective materials or dedicated balancing tools, making the system self-sufficient.

Inventive Principle:
Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach achieves a stable rotational balance by evenly distributing the weight of windings, reducing vibrations and simplifying the manufacturing process by eliminating the need for additional balancing steps or tools.

Implementation Method 1

When an electric power is supplied from a commutator to the windings, the armature is rotated

Methodology Applied
Scientific EffectCentrifugal force: Centrifugal Force

Data Source

PatentUS7812497B2Armature, dynamo-electric machine and manufacturing method of armature
Publication Date: 2010.10.12 DENSO CORP
  • US7812497B2 patent drawing
  • US7812497B2 patent drawing
  • US7812497B2 patent drawing

AI summary

A total number of windings in an armature is an even number. The windings are divided into a first winding group and a second winding group. The windings of the first winding group are arranged one after another at generally equal angular intervals without overlapping with each other. The windings of the second winding group are arranged one after another at generally equal angular intervals without overlapping with each other and are wound separately from the windings of the first winding group.