Magnetic Circuit Using Segmented Short Magnets
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Solution Overview
Problem
Existing long magnetic circuits face issues with non-uniform magnetic field intensity distribution and the difficulty in processing and fragility of long permanent magnets, which complicates the formation of a uniform magnetic flux density in the array direction.
Innovation Solution
A magnetic circuit comprising an array of short magnets with a predetermined gap or less between them, sandwiched by yokes, ensuring uniform magnetic flux density distribution even when adjacent magnets are not in close contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a long permanent magnet is used to form a long sandwiched type magnetic circuit, then the magnetic field intensity is strengthened, but the processing becomes difficult and the magnet breaks easily
Solution Approach 1:
The long permanent magnet is divided into multiple short permanent magnets arranged in an array. Each short magnet is processed separately, avoiding the difficulty of processing long magnets. The magnets are positioned with predetermined gaps between them, and yokes are provided to sandwich the array, creating a long magnetic circuit with uniform magnetic flux density distribution.
2Force
If a long permanent magnet is used to form a long sandwiched type magnetic circuit, then the magnetic field intensity is strengthened, but the magnet breaks easily
Solution Approach 1:
The long permanent magnet is divided into multiple short permanent magnets arranged in an array. Each short magnet is processed separately, avoiding the difficulty of processing long magnets. The magnets are positioned with predetermined gaps between them, and yokes are provided to sandwich the array, creating a long magnetic circuit with uniform magnetic flux density distribution.
3Ease of manufacture
If permanent magnets are arranged with spaces between them so that surfaces having the same magnetic polarity face each other, then the arrangement is simple, but the magnetic field intensity distribution in the length direction is not uniform
Solution Approach 1:
Yokes are introduced as intermediary elements that sandwich the array of permanent magnets. The yokes are positioned at both ends of the array and extend along the arrangement direction, covering the gaps between adjacent magnets. This intermediary structure guides and uniformizes the magnetic flux distribution, ensuring uniform magnetic field intensity in the length direction while maintaining the simple array arrangement.
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 allows for a uniform magnetic flux density in the array direction, improving productivity by using shorter magnets and reducing the risk of magnet breakage, while maintaining magnetic field strength.
Implementation Method 1
a plurality of magnets that are arranged in an array and spaced apart by a predetermined gap or less, and yokes that are provided on the plurality of magnets
Data Source
AI summary
A magnetic circuit, provided with a short magnet (1a) and short magnet (1b) that are arranged in an array, and a yoke (2a) and a yoke (2b) provided so as to sandwich the short magnet (1a) and short magnet (1b). The short magnet (1a) and short magnet (1b), are arranged, that have a space between them that is a predetermined gap (3) or less in the arrangement direction of the array respectively. In addition, the short magnet (1a) and short magnet (1b) are arranged so that one magnetic pole is located on the side toward one of the pair of yokes (2a) and (2b), and the other magnetic pole is located on the side toward the other yoke.