Halbach Magnet Brake Ring for Lightweight Baitcasting Reels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing baitcasting reels with electromagnetic brakes are heavy due to large magnets, limiting casting of small-weight baits and affecting user experience.
Innovation Solution
An electromagnetic brake mechanism using a magnet assembly with magnets arranged in a Halbach array and a brake control circuit to generate a braking force, reducing the weight and size of the line reel while maintaining strong magnetic force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If magnets with large volume are mounted on the line reel to generate strong braking force, then the braking force is sufficient, but the weight of the line reel greatly increases
Solution Approach 1:
The patent applies the Halbach array configuration to arrange magnets with specific magnetic polarities, which concentrates magnetic flux in the desired direction and reduces magnetic flux leakage. This parameter change in magnetic arrangement achieves stronger magnetic field intensity and braking force while using smaller magnet volumes, thereby reducing the weight of the line reel while maintaining sufficient braking capability
Solution Approach 2:
The Halbach array creates a non-uniform magnetic field distribution with concentrated flux density in specific regions where it is needed for braking. By optimizing the local magnetic field quality and concentration at the braking interface, the system achieves effective braking force with reduced overall magnet size and weight
2Force
If magnets with large volume are mounted on the line reel to generate strong braking force, then the braking force is sufficient, but the size of the line reel increases
Solution Approach 1:
The Halbach array configuration changes the magnetic field parameters by concentrating flux lines in the braking direction and minimizing leakage. This allows the use of smaller magnet volumes while maintaining the required magnetic field strength for effective braking, thus reducing the overall volume of the line reel
3Force
If magnets with large volume are mounted on the line reel to generate strong braking force, then the braking force is sufficient, but the casting of small-weight bait is limited and user experience is affected
Solution Approach 1:
By implementing the Halbach array, the patent optimizes magnetic field parameters to achieve concentrated flux density with smaller magnets. This reduces the weight and size of the line reel, making it more responsive and easier to operate during casting of small-weight bait, thereby improving user experience while maintaining sufficient braking force
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 mechanism achieves a strong braking force with smaller magnets, reducing the line reel's weight and minimizing interference with the rotating shaft, enhancing user experience.
Implementation Method 1
a brake control circuit connected with the at least one coil to form a closed loop with the at least one coil according to the rotating speed of the line reel so as to generate an induced electromagnetic field
Implementation Method 2
the magnetic ring sleeving a rotating shaft of the line reel and including a plurality of magnets arranged in a Halbach array
Data Source
AI summary
Disclosed are an electromagnetic brake mechanism a baitcasting reel and a fishing tackle. The electromagnetic brake mechanism includes a line reel; a magnet assembly including a magnetic ring and at least one coil, the magnetic ring sleeving a rotating shaft of the line reel and including a plurality of magnets arranged in a Halbach array; and a brake control circuit connected with the at least one coil to form a closed loop with the at least one coil according to the rotating speed of the line reel so as to generate an induced electromagnetic field and then form a braking force inhibiting the rotation of the line reel. The size of the magnetic ring can be reduced under the same intensity of the magnetic force, so that the overall weight of the line reel is reduced, and the use experience of a user is improved.