Hyper Halbach Magnet Arrays for High Flux Density
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Solution Overview
Problem
Existing Halbach arrays, while effective in enhancing magnetic fields, do not achieve sufficient magnetic flux densities in electromotive devices, necessitating the development of higher-order arrays for improved performance.
Innovation Solution
The introduction of second and third-order Hyper Halbach arrays, featuring specific arrangements of magnets with successive 90-degree rotations, which enhance magnetic flux densities and allow for larger air gaps in electromotive devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional Halbach arrays are used, then magnetic field enhancement is achieved, but magnetic flux density is insufficient for high-performance electromotive devices
Solution Approach 1:
The patent transitions from conventional first-order Halbach arrays to second-order Hyper Halbach arrays by introducing an additional rotational dimension. Each successive row of magnets is rotated 90 degrees counter-clockwise relative to the previous row, creating a multi-dimensional field enhancement pattern that significantly increases magnetic flux density while maintaining manageable structural complexity
Solution Approach 2:
The Hyper Halbach array structure embeds multiple conventional Halbach array patterns within a larger rotational framework. Each row contains a complete Halbach sequence, and these rows are nested within a higher-order rotational structure, allowing the system to leverage the proven effectiveness of first-order arrays while achieving second-order flux density enhancement
2Quantity of substance
If higher flux densities are achieved through conventional methods, then device performance improves, but device weight increases
Solution Approach 1:
The patent changes the geometric and orientational parameters of the magnet array from first-order to second-order Hyper Halbach configuration. This parameter change optimizes the magnetic field distribution to achieve higher flux densities with the same magnet material and volume, thereby increasing performance without proportionally increasing weight
Solution Approach 2:
The Hyper Halbach array creates a composite magnetic field structure by combining multiple magnet orientations and rows in a specific rotational pattern. This composite arrangement produces synergistic field enhancement effects that achieve higher flux densities than individual magnet configurations, reducing the total magnet volume and weight required
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
These arrays provide significantly higher magnetic flux densities compared to conventional Halbach arrays, enabling simpler and cost-effective enhancements in motor/generators and other magnetically driven devices, as well as improved performance in magnetic levitation and particle beam focusing applications.
Implementation Method 1
a second order Hyper Halbach array of magnets comprises a plurality of magnets arranged immediately adjacent to each other so as to define a rectangular matrix having rows and columns, in which the respective magnetic fields of a first row of the array are arranged so as to define a conventional first order Halbach array and, proceeding in a column direction of the array, the respective magnetic fields of the magnets of each of a second and succeeding rows of the array are respectively rotated counter-clockwise about an axis perpendicular to the column direction of the array through successive 90 degree rotations relative to those of the immediately preceding row
Data Source
AI summary
Higher-order Halbach permanent magnet arrays that produce higher flux densities in the air gaps of electromotive machines are described. In one embodiment, a second order “Hyper” Halbach array includes a plurality of magnets arranged immediately adjacent to each other so as to define a rectangular matrix having rows and columns in which the respective magnetic fields of a first row of the array are arranged so as to define a conventional first order Halbach array, and, proceeding in a column direction of the array, the respective magnetic fields of the magnets of each of a second and succeeding rows of the array are respectively rotated counter-clockwise about an axis perpendicular to the column direction of the array through successive 90 degree rotations relative to those of the immediately preceding row.