Internally Cooled Magnetic Rotor to Prevent Heat-Driven Demagnetization
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Solution Overview
Problem
Magnetic rotors used for heating substrates face issues with heat generation leading to reduced field strength, efficiency, and shortened lifespan due to demagnetization, as existing internally cooled rotor systems are not effectively designed to manage heat during operation.
Innovation Solution
A magnetic rotor system with a rotatable rotor body featuring a chamber for coolant flow, where a coolant supply is in fluid communication with the rotor body to remove heat from the magnets, maintaining magnetic field strength and extending the rotor's usable life by controlling temperature gradients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a magnetic rotor with permanent magnets is used to heat a substrate, then heating capability is improved, but heat generated by the magnets reduces field strength and efficiency
Solution Approach 1:
The patent extracts the harmful heat generated by the magnets from the magnetic rotor system by introducing a separate coolant circulation system. The coolant absorbs excess heat from the rotor body and magnets, carrying it away to a heat exchanger, thereby maintaining magnetic field strength while preserving heating capability.
Solution Approach 2:
The patent introduces coolant as an intermediary substance between the heat-generating magnets and the surrounding environment. This intermediary absorbs thermal energy through convection and conduction, transferring it away from the magnetic components to prevent field strength degradation.
2Power
If a magnetic rotor with permanent magnets is used to heat a substrate, then heating capability is improved, but the possibility of demagnetization increases
Solution Approach 1:
The patent extracts harmful heat from the magnetic rotor by implementing an internal coolant circulation system with channels positioned near the magnets. This continuous heat removal prevents temperature from reaching demagnetization thresholds, thereby protecting magnetic properties while maintaining heating function.
Solution Approach 2:
The patent applies prior cushioning by pre-cooling the rotor body and magnets through continuous coolant circulation before demagnetization can occur. The system proactively manages thermal buildup, creating a thermal buffer that prevents catastrophic demagnetization events.
3Power
If a magnetic rotor with permanent magnets is used to heat a substrate, then heating capability is improved, but the useable life of the magnetic rotor is reduced
Solution Approach 1:
The patent implements continuous cooling action through a circulation system that constantly moves coolant through channels in the rotor body. This uninterrupted thermal management prevents cumulative thermal damage, extending the operational lifespan of the magnetic rotor while maintaining heating capability.
Solution Approach 2:
The patent extracts accumulated heat from the magnetic rotor through continuous coolant circulation and external heat exchange. By continuously removing thermal energy that would otherwise degrade materials and magnets over time, the system extends usable life while preserving heating power.
4Temperature
If an internally cooled rotor system is used, then heat management is improved, but the system complexity increases
Solution Approach 1:
The patent merges the cooling function directly into the magnetic rotor structure by integrating coolant channels within the rotor body itself. This combination eliminates the need for separate external cooling apparatus, reducing overall system complexity while maintaining effective temperature control.
Solution Approach 2:
The patent applies nesting by placing coolant channels and flow paths inside the rotor body structure. The cooling system is nested within the magnetic rotor, allowing heat management functionality to be embedded without adding external complexity.
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 internally cooled magnetic rotor system effectively maintains magnetic field strength, increases operational efficiency, and extends the rotor's lifespan by efficiently managing heat, allowing for higher rotational speeds and the ability to heat thicker or more conductive substrates without premature demagnetization.
Implementation Method 1
The magnetic rotor rotates about an axis to induce a magnetic field into the substrate to heat the substrate
Implementation Method 2
The rotor body defines a coolant flow path within the chamber from the inlet to the outlet, and the rotor body is configured to receive a coolant within the chamber
Implementation Method 3
a coolant supply is in fluid communication with the magnetic rotor such that a coolant can be provided into the chamber of the rotor body
Data Source
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AI summary
Disclosed are magnetic rotors systems and methods for heating a substrate. The magnetic rotor includes a rotor body and at least one magnet supported on the rotor body. The rotor body is rotatable about an axis. The rotor body also defines a chamber that selectively receives a coolant within the chamber.