BLDC Blower Motor Stator Block for Heat Dissipation and Grounding

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Solution Overview

Problem

Existing blower motors for vehicles have complex stator block structures that complicate assembly, compromise heat dissipation and grounding functions, and generate noise due to structural complexity and lack of rigidity.

Innovation Solution

A blower motor with a novel stator block structure featuring a circular plate with a hollow protrusion and radially protruding couplers, which improves assemblability, enhances heat dissipation through thermal conductivity, and provides effective grounding while reducing noise.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If the stator block and printed circuit board are directly coupled to dissipate heat, then heat dissipation is improved, but the structure becomes complicated and assembly rigidity cannot be ensured

Engineering Contradiction:

Improveheat dissipationVSAvoidstator block structure

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The patent merges the heat dissipation function and grounding function into a single integrated stator block structure. The stator block simultaneously serves as a heat sink for the printed circuit board and as a grounding structure, eliminating the need for separate components while simplifying the overall assembly.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The stator block is designed to perform multiple functions: structural support for the stator core, heat dissipation for the printed circuit board, grounding for electrical components, and noise prevention. This multi-functional design reduces component count and assembly complexity while maintaining all necessary functions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Manufacturing precision

If guide protrusions are formed on the stator block for stator core assembly, then assembly precision is improved, but the structure becomes complicated and rigidity cannot be ensured

Engineering Contradiction:

Improveassembly precisionVSAvoidstator block structure

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent segments the positioning function from the main stator block body by using the cylindrical body as a separate structural element. The guide protrusions are formed on this cylindrical body portion, allowing precise positioning of the stator core while maintaining the structural integrity and rigidity of the overall stator block design.

Inventive Principle:

Principle #1Segmentation

3Reliability

If a cylindrical body protrudes from the stator block to house the bearing, then bearing support is improved, but the structure becomes complicated

Engineering Contradiction:

Improvebearing supportVSAvoidstator block structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the bearing housing function into the cylindrical body portion of the stator block. This cylindrical body serves dual purposes: providing structural support for the stator core through guide protrusions and housing the bearing for rotor support, thereby reducing the need for separate housing components.

Inventive Principle:

Principle #5Merging (Combining)

4Ease of manufacture

If the stator block structure is simplified for easier assembly, then ease of manufacture is improved, but heat dissipation and grounding functions may be compromised

Engineering Contradiction:

Improveassembly easeVSAvoidheat dissipation function

Core Design Contradiction:

Ease of manufactureVSTemperature

Solution Approach 1:

The stator block is designed as a multi-functional component that simultaneously provides structural support, heat dissipation, grounding, and noise prevention. By integrating these functions into a single component rather than using multiple separate parts, the patent achieves easier assembly while maintaining all necessary functional performance.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

The novel stator block structure improves assembly efficiency, enhances heat dissipation and grounding functions, and reduces noise generated within the motor, resulting in a more reliable and efficient blower motor.

Implementation Method 1

effectively dissipating heat generated during operation of the motor

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

When current is applied to a coil wound around the stator core, the rotor is rotated by electromagnetic interaction with the stator

Methodology Applied

Scientific EffectElectromagnetic interaction: Lorentz Force

Data Source

PatentUS12341401B2Brushless direct current blower motor with novel stator block

Publication Date: 2025.06.24 HYO SEONG ELECTRIC

AI summary

A blower motor includes a motor assembly 100 including a stator assembly 1 comprising a stator core 10, an upper insulator 11 coupled to an upper portion of the stator core 10 and a lower insulator 12 coupled to a lower portion of the stator core 10, a rotor assembly 2 rotating around the stator assembly 1, a stator block 3 to which the stator assembly 1 is coupled, a printed circuit board 4 located at a lower portion of the stator block 3, and a motor cover 5 coupled to the stator block 3; a flange 200; and a damper plate 300.