Permanent Magnet Array for High Magnetic Field Generation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for generating high magnetic fields, such as those used in testing magnetic devices, face limitations due to high power consumption and self-heating issues, particularly with electromagnets, which restrict their use in prolonged testing and increase costs.
Innovation Solution
A system comprising a plurality of permanent magnets arranged in a plane with alternating polarities and separated by nonmagnetic material, along with magnetic cells that can be heated to switch magnetization, generating a high magnetic field with minimal power consumption and self-heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If electromagnets are used to generate high magnetic fields, then magnetic field magnitude can be achieved, but power consumption and self-heating increase significantly
Solution Approach 1:
The patent replaces electromagnets (electrical system) with permanent magnets (magnetic system) to generate the magnetic field. This substitution eliminates the need for electrical power to maintain the magnetic field, thereby resolving the contradiction between achieving high magnetic field magnitude and reducing power consumption. The permanent magnets provide a persistent magnetic field without continuous energy input.
Solution Approach 2:
The patent changes the operational parameters by using permanent magnets with specific remanence properties instead of electromagnets. This parameter change from electrical excitation to permanent magnetic material allows achieving high magnetic field magnitude (10 kOe or greater) without the power consumption and self-heating issues inherent in electromagnet systems.
2Power
If electromagnets are used to generate high magnetic fields, then magnetic field magnitude can be achieved, but self-heating becomes critical
Solution Approach 1:
The patent replaces electromagnets with permanent magnets, eliminating the electrical current that causes resistive heating in electromagnet coils. This substitution directly addresses the self-heating problem while maintaining the ability to generate high magnetic field magnitude, as permanent magnets do not generate heat through electrical resistance.
3Power
If electromagnets are used to generate high magnetic fields, then magnetic field can be applied, but cooling requirements increase cost and size
Solution Approach 1:
The patent replaces electromagnets with permanent magnets, eliminating the need for cooling systems entirely. Since permanent magnets generate magnetic fields without electrical current, there is no heat generation requiring cooling infrastructure. This substitution directly reduces device complexity by removing cooling requirements while maintaining magnetic field generation capability.
4Power
If electromagnets are used to generate high magnetic fields, then magnetic field can be applied, but duty cycle is limited
Solution Approach 1:
The patent replaces electromagnets with permanent magnets, which provide a continuous, stable magnetic field without thermal limitations. Unlike electromagnets that must be cycled to prevent overheating, permanent magnets can operate indefinitely without duty cycle restrictions, enabling prolonged testing and extended duration of magnetic field application.
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 system achieves a magnetic field magnitude of 10 kOe or greater with negligible power consumption and self-heating, making it cost-effective and suitable for extended testing without thermal limitations.
Implementation Method 1
a plurality of permanent magnets arranged in a plane, each magnet being spatially separated along the plane from the adjacent magnet by a predetermined spacing, each magnet having a magnetic polarity opposed to the one of the adjacent magnet such that a magnetic field of adjacent magnets is oriented substantially perpendicular to the plane
Implementation Method 2
a heating line physically separated from each of said plurality of magnetic cells and configured for passing a heating current pulse for heating any one of said plurality of magnetic cells
Data Source
AI summary
An apparatus for generating a magnetic field including permanent magnets arranged in a plane, each magnet being spatially separated along the plane from the adjacent magnet by a predetermined spacing, each magnet having a magnetic polarity opposed to the polarity of the adjacent magnet such that a magnetic field of adjacent magnets is oriented substantially perpendicular to the plane and in opposite directions, each magnet being spatially separated in the plane from the adjacent magnet by a nonmagnetic material. A method for programming a magnetic device or sensor device using the apparatus is also described.