Cooling Current Lines Superconducting Rotating Machine

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Solution Overview

Problem

Conventional superconducting rotating machines face heat transfer issues due to external heat and resistance-generated heat in current lines, leading to deformation of the superconducting coil.

Innovation Solution

A cooling device utilizing thermoelectric elements as heat conduction members, with high thermal conductivity coatings and metallic thermal links, effectively transfers heat from current lines to the stator while preventing heat transfer to the air, using insulators to isolate heat from the power slip ring.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If current lines are used to supply power to the superconducting coil, then electric power can be transmitted to the rotating rotor, but heat is generated at the current lines due to resistance and transferred to the superconducting coil causing deformation

Engineering Contradiction:

Improveelectric power transmissionVSAvoidheat generation at current lines

Core Design Contradiction:

Use of energy by moving objectVSTemperature

Solution Approach 1:

A cooling device is introduced as an intermediary component between the current lines and the superconducting coil. This cooling device includes a cooling member that contacts the current line and a heat radiating member that transfers heat from the current line to the surrounding air, thereby mediating the heat transfer process and preventing heat from reaching the superconducting coil.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The heat generated by the current line, which is a harmful effect, is converted into a beneficial cooling process. The cooling device utilizes the heat radiating member to actively dissipate the heat into the air, transforming the harmful heat generation into a controlled thermal management process that protects the superconducting coil.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Use of energy by moving object

If external heat is transferred to the current lines via the brush and power slip ring, then power supply is enabled, but the superconducting coil is deformed due to the transferred heat

Engineering Contradiction:

Improvepower supply to rotorVSAvoidexternal heat transfer to current lines

Core Design Contradiction:

Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

The cooling device acts as a thermal intermediary that intercepts heat from the current line before it can reach the superconducting coil. The cooling member in direct contact with the current line absorbs heat, and the heat radiating member dissipates it to the air, creating a thermal barrier that protects the superconducting coil from external heat transfer.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The cooling device performs preliminary heat removal from the current line before the heat can be transferred to the superconducting coil. By continuously dissipating heat at the current line location, the system preemptively prevents the harmful thermal effect from reaching the temperature-sensitive superconducting coil.

Inventive Principle:

Principle #9Preliminary anti-action

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 cooling device stabilizes and efficiently removes heat from current lines, preventing superconducting coil deformation and maintaining effective cooling during power supply and rotor rotation.

Implementation Method 1

heat conduction members respectively mounted to outer surfaces of the current lines, each heat conduction member being in contact with an inner peripheral surface of the stator such that the heat conduction member transfers, to the stator, heat generated from a corresponding one of the current lines

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

insulators each surrounding a corresponding one of the current lines between a corresponding one of the heat conduction members and the power slip ring, to thermally insulate the heat generated from the corresponding current line

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Data Source

PatentUS7915770B2Device for cooling current lines of superconducting rotating machine

Publication Date: 2011.03.29 DOOSAN HEAVY IND & CONSTR CO LTD

AI summary

A cooling device for current lines of a superconducting rotating machine, which is capable of removing heat generated from the current lines of the superconducting rotating machine, thereby effectively preventing a superconducting coil from being deformed due to the heat generated from the current lines, is disclosed. The cooling device includes heat conduction members respectively mounted to outer surfaces of the current lines. Each heat conduction member is in contact with an inner peripheral surface of the stator such that the heat conduction member transfers, to the stator, heat generated from a corresponding one of the current lines. The heat conduction member further includes insulators each surrounding a corresponding one of the current lines between a corresponding one of the heat conduction members and a power slip ring arranged in the stator, to thermally insulate the heat generated from the corresponding current line.