Modular Deflector Cover for Convertible Motor Ventilation

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Solution Overview

Problem

Rotating electric machines face challenges in achieving efficient heat exchange due to varying operating conditions, mechanical loads, and temperatures, with existing deflector covers being costly to install, prone to damage, and lacking modularity between self-ventilated and forced ventilation modes, while also requiring robustness, lightness, and ease of assembly.

Innovation Solution

A modular deflector cover designed as a single piece with distinct regions for coupling, suction, guiding, and engagement, featuring adjustable air passage openings and attachment points for easy conversion between ventilation modes, made from resilient materials like cast iron alloys, allowing for efficient air flow and integration with various accessories.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If traditional deflector covers are used, then structural robustness is achieved, but installation cost increases and modularity is lost

Engineering Contradiction:

Improvestructural robustnessVSAvoidinstallation cost

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The deflector cover is divided into multiple modular components including a central hub, radial arms, and interchangeable end caps. Each segment can be manufactured separately using standard casting processes, reducing overall manufacturing complexity and installation cost while maintaining structural integrity through standardized connection interfaces.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The modular deflector cover design incorporates universal connection interfaces and standardized geometries that allow the same basic structure to serve multiple ventilation configurations. The radial arms can be arranged in different patterns and combined with various end caps to create different deflector configurations, eliminating the need for custom-designed covers for each application.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If traditional deflector covers are used, then ventilation function is provided, but modularity between self-ventilated and forced ventilation modes is lacking

Engineering Contradiction:

Improveventilation mode conversionVSAvoiddeflector cover structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The deflector cover incorporates adjustable and interchangeable components that allow dynamic reconfiguration between self-ventilated and forced ventilation modes. The radial arms can be repositioned, and different end caps can be attached depending on the ventilation mode required, enabling the same base structure to adapt to different operational requirements without increasing overall system complexity.

Inventive Principle:

Principle #15Dynamics

3Reliability

If deflector covers are made more robust, then damage resistance improves, but weight increases

Engineering Contradiction:

Improvedamage resistanceVSAvoiddeflector cover weight

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

The modular deflector cover applies material and structural strength locally only where required by the functional demands of each specific component. The radial arms and hub use sufficient material for structural integrity, while the end caps and adjustment mechanisms use minimal material necessary for their specific functions, optimizing the overall weight-to-strength ratio.

Inventive Principle:

Principle #3Local quality

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 modular deflector cover enables efficient heat exchange in both self-ventilated and forced ventilation modes, reduces installation costs, and ensures geometric and positional stability, while being easy to assemble and disassemble, thus addressing the limitations of existing solutions.

Implementation Method 1

channeling and guiding the air moved both by fan(s) or blower(s) of self-ventilated cooling systems or by forced ventilation devices

Methodology Applied

Scientific EffectAir flow: Convection

Data Source

PatentUS20250015664A1Deflector cover for rotating electric machine, modular sets for deflector covers, corresponding rotating electric machine and methods of converting the ventilation mode of a rotating electric machine

Publication Date: 2025.01.09 WEG EQUIPMENTOS ELÉCTRICOS SA

AI summary

The present invention relates to a deflector cover for a rotating electric machine, comprising a suction region (120) forming an annular crown (121) comprising at least one body portion (122) and a plurality of air passage openings (123), through-going and distributed throughout the surface of the annular crown (121), forming a structure in the form of a perimeter grid and at least one radial opening (124) comprising a frame (125) with attachment points (126). The present invention also relates to a modular self-ventilated set for deflector covers, a modular forced ventilation set for deflector covers, a rotating electric machine, a method of converting the ventilation mode of a self-ventilated rotating electric machine to a forced ventilation mode and to a method of converting the ventilation mode of a rotating electric machine from forced ventilation to a self-ventilated mode.