Air-Cooled Motor Heatsink Layout for Directed Internal Airflow

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Solution Overview

Problem

Existing electric motor assemblies face challenges in efficiently directing airflow to desired locations without requiring additional components, which increases size and cost.

Innovation Solution

A motor assembly design featuring a shroud with circumferentially positioned protrusions on a heatsink and a fan positioned between the shroud and heatsink, which together channel airflow through channels and openings to direct it towards the axis and into compartments, eliminating the need for additional components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If additional components are used to direct airflow to desired locations, then airflow direction control is improved, but assembly size and cost increase

Engineering Contradiction:

Improveairflow direction controlVSAvoidassembly size and component count

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent combines the airflow directing function with the heatsink structure by integrating channels directly into the heatsink body. The channels are formed as integral parts of the heatsink, eliminating the need for separate airflow directing components while maintaining effective airflow control to desired locations.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The heatsink is designed to serve multiple functions simultaneously: it provides thermal management through heat dissipation while also functioning as an airflow directing mechanism. The channels within the heatsink structure perform both cooling and airflow direction control, reducing the need for additional specialized components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If additional components are used to direct airflow, then airflow direction control is improved, but manufacturing cost increases

Engineering Contradiction:

Improveairflow direction controlVSAvoidmanufacturing cost

Core Design Contradiction:

Ease of operationVSEase of manufacture

Solution Approach 1:

The airflow directing function is merged into the heatsink structure itself. The channels are formed as integral parts of the heatsink body, which reduces the total component count and simplifies manufacturing processes. This integration eliminates the need for separate airflow directing components and their associated assembly steps.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The heatsink is segmented into multiple channels that are circumferentially spaced around the axis, with each channel directing airflow to specific locations. This segmentation allows for precise airflow control while maintaining a single integrated component structure that is cost-effective to manufacture.

Inventive Principle:

Principle #1Segmentation

3Ease of operation

If more components are added to the assembly, then airflow directing capability is improved, but assembly size increases

Engineering Contradiction:

Improveairflow directing capabilityVSAvoidassembly size

Core Design Contradiction:

Ease of operationVSVolume of moving object

Solution Approach 1:

The patent merges the airflow directing function into the existing heatsink structure. The channels are formed within the heatsink body itself, eliminating the need for additional separate components. This integration maintains compact assembly size while providing effective airflow directing capability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The channels are arranged in a circumferential pattern around the axis, utilizing the radial dimension to direct airflow to different locations. This dimensional arrangement allows for multiple airflow paths within a compact cross-sectional area, improving airflow directing capability without proportionally increasing assembly size.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 design effectively directs airflow without additional components, reducing assembly size and cost while maintaining cooling efficiency.

Implementation Method 1

The protrusions configured to introduce airflow into the second compartment... the fan configured to draw airflow from the heatsink

Methodology Applied

Scientific EffectAir cooling: Convection

Implementation Method 2

a heatsink coupled to the shroud relative to the second compartment... the heatsink defining a plurality of protrusions

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS20250373121A1Air-cooled motor assembly with heatsink

Publication Date: 2025.12.04 REGAL BELOIT AMERICA INC

AI summary

A motor assembly is provided that includes a mounting bracket and a housing, the mounting bracket coupled to the housing, the housing defining a first compartment. The motor assembly further includes a motor positioned within the first compartment and a shroud coupled to the housing, the shroud defining a second compartment. The motor assembly also includes a shaft coupled to the motor and configured to rotate about an axis, the shaft extends axially through an opening in the shroud into the second compartment. The motor assembly further includes a heatsink and a cover, the heat sink coupled to the shroud relative to the second compartment, and the cover coupled to the heatsink. The heatsink defining a plurality of protrusions circumferentially positioned around the axis. The protrusions configured to introduce airflow into the second compartment.