Dual-Circuit Stator Coil Layout for Balanced Motor Fields

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Solution Overview

Problem

Existing motors generate an unbalanced magnetic field due to coils being wound in a manner that results in magnetic field generation at only half the stator's circumference, leading to uneven operation.

Innovation Solution

The coils are wound in a dual manner with separation in circuitry, and the busbars are stacked axially with non-overlapping contact regions, ensuring uniform magnetic field generation and easy connection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If coils are wound in a dual manner with separation in circuitry occupying half of the stator each, then fail-safe reliability is improved, but magnetic field balance deteriorates

Engineering Contradiction:

Improvefail-safe reliabilityVSAvoidmagnetic field balance

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The stator is divided into two distinct regions (first region and second region) in the circumferential direction, with each region containing coils of a specific circuitry group. This segmentation allows independent winding of first coils and second coils while maintaining overall stator integrity, enabling both fail-safe reliability and magnetic field balance

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the stator are assigned different coil configurations - the first region contains first coils connected to first busbars, while the second region contains second coils connected to second busbars. This local differentiation ensures that each region contributes appropriately to the overall magnetic field balance while maintaining circuitry separation for fail-safe operation

Inventive Principle:

Principle #3Local quality

2Ease of operation

If first busbar and second busbar are stacked in axial direction with overlapping contact regions, then connection ease is improved, but manufacturing precision deteriorates

Engineering Contradiction:

Improveconnection easeVSAvoidcontact region alignment precision

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The first busbar and second busbar are designed with asymmetric contact region positions in the axial direction. The contact region of the first busbar is positioned at a different axial location than the contact region of the second busbar, eliminating overlap and the associated alignment precision requirements while maintaining easy electrical connection

Inventive Principle:

Principle #4Asymmetry

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 configuration allows for a uniform magnetic field distribution and easy connection of coils, enhancing motor performance and reliability.

Implementation Method 1

a rotor of a motor is rotated by an electromagnetic interaction between the rotor and a stator

Methodology Applied

Scientific EffectElectromagnetic interaction: Electromagnetic Induction

Data Source

PatentUS20260088677A1Motor

Publication Date: 2026.03.26 LG INNOTEK CO LTD

AI summary

The present invention may provide a motor including a shaft, a rotor coupled to the shaft, and a stator disposed to correspond to the rotor, wherein the stator includes a stator core, an insulator coupled to the stator core, and coils disposed on the insulator, the coils include a first coil and a second coil which are separated in circuitry, the insulator includes a first region in which the first coil is disposed and a second region in which the second coil is disposed, and the motor comprises a first busbar electrically connected to the first coil and a second busbar electrically connected to the second coil.