Ceramic Evaporator Cooling in Alternating Magnetic Fields

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Solution Overview

Problem

Existing cooling solutions for structures in alternating magnetic fields, such as electric motors, face inefficiencies due to heat induction in conductive materials and limitations in positioning cooling devices within high magnetic field areas.

Innovation Solution

A cooling device comprising an evaporator part made of electrically and magnetically non-conductive material, such as ceramic, positioned within high magnetic fields, and a condenser part made of conductive material, like copper, located in low magnetic field areas, connected via pipes or fibers to enhance heat transfer and prevent electrical induction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a conductive material (e.g., metal) is used for the evaporator part in high magnetic field areas, then thermal conductivity is improved, but electrical induction and magnetic interference increase

Engineering Contradiction:

Improveheat absorption efficiencyVSAvoidelectrical induction

Core Design Contradiction:

TemperatureVSObject-generated harmful factors

Solution Approach 1:

The evaporator part is made of a composite structure combining ceramic material (electrically and magnetically non-conductive) with embedded heat transfer elements. This composite approach allows the evaporator to maintain high heat absorption efficiency while preventing electrical induction and magnetic interference by using the electrically insulating ceramic matrix.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The invention changes the material parameter of the evaporator from conductive metal to non-conductive ceramic, fundamentally altering the electrical and magnetic properties while maintaining thermal functionality through the ceramic's inherent heat transfer capabilities and integrated cooling channels.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If the evaporator part is positioned within high magnetic field areas for direct cooling, then cooling efficiency is improved, but electrical induction in the cooling device increases

Engineering Contradiction:

Improvecooling efficiencyVSAvoidenergy loss due to electrical induction

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The ceramic evaporator material acts as an intermediary between the high magnetic field environment and the cooling medium. It allows the evaporator to be positioned directly in high magnetic field areas for optimal cooling efficiency while the ceramic's non-conductive properties prevent electrical induction, eliminating energy losses.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Temperature

If metal materials are used for the heat pipe, then thermal conductivity is improved, but magnetic and electrical interference in alternating magnetic fields increases

Engineering Contradiction:

Improvethermal conductivityVSAvoidmagnetic and electrical interference

Core Design Contradiction:

TemperatureVSObject-affected harmful factors

Solution Approach 1:

The invention applies different material qualities to different parts of the heat pipe system: the evaporator part in the high magnetic field area is made of non-conductive ceramic to prevent interference, while the condenser part in low magnetic field areas can use conductive metal for optimal heat dissipation. This local differentiation resolves the contradiction between thermal conductivity and magnetic/electrical interference.

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

This configuration increases heat absorption and transfer efficiency while minimizing electrical and magnetic interference, improving cooling performance and safety in high magnetic field environments.

Implementation Method 1

In the evaporator part, the cooling medium absorbs heat from the structure to be cooled and evaporates.

Methodology Applied

Scientific EffectEvaporation: Evaporation

Implementation Method 2

the cooling medium absorbs heat from the structure to be cooled

Methodology Applied

Scientific EffectHeat absorption: Absorption (physical)

Implementation Method 3

The evaporated, gaseous cooling medium travels to the condenser part where it condenses again.

Methodology Applied

Scientific EffectCondensation: Condensation

Data Source

PatentUS12095347B2Cooling device for use in alternating magnetic fields, coil arrangement, electric machine, and aircraft

Publication Date: 2024.09.17 AIRBUS (SAS)

AI summary

A cooling device for use in alternating magnetic fields include an evaporator part defining a first volume for evaporating a cooling medium contained therein, the evaporator part being made of an electrically and magnetically non-conductive material, and a condenser part defining a second volume for condensing the cooling medium contained therein, the condenser part being in fluid connection with the first volume.