Rotating Magnet Power Generation Input Device
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Solution Overview
Problem
Existing power generation input devices suffer from low power generation efficiency due to limited change in magnetic flux and require excessive operating force to rotate magnets, making them difficult to operate effectively.
Innovation Solution
A power generation input device with a rotating body having reverse magnetic poles and magnetization members that are attracted to both ends of a magnetic path forming member, allowing for increased rotation speed and efficient power generation without requiring excessive operating force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a magnet is moved in or out of the space without changing orientation, then the structure is simple, but the power generation efficiency is poor due to limited magnetic flux change
Solution Approach 1:
The magnet is changed from linear movement to rotational movement, allowing the magnetic poles to dynamically change orientation relative to the magnetic path. This rotational dynamics enables both magnetic poles to alternately enter and exit the magnetic path, significantly increasing magnetic flux change and power generation efficiency while maintaining operational simplicity
Solution Approach 2:
The rotational movement creates a periodic alternation where magnetic poles sequentially enter and exit the magnetic path at regular intervals. This periodic action ensures continuous and repeated magnetic flux changes, maximizing the induced electromotive force and power generation efficiency through rhythmic magnetic field variations
2Power
If a return spring is used to withdraw the magnet quickly, then the electromotive force increases, but the operating force becomes excessively large
Solution Approach 1:
The system uses rotational dynamics where the magnet naturally accelerates during rotation due to inertia and magnetic attraction/repulsion forces. This eliminates the need for strong return springs, reducing the operating force required while maintaining high electromotive force generation through rapid magnetic flux changes
Solution Approach 2:
The magnet's rotational movement is self-accelerating through magnetic attraction and repulsion forces between poles. The system uses its own magnetic field interactions to generate the motion needed for high electromotive force, rather than requiring external spring forces, thereby reducing operating force requirements
3Reliability
If magnetic poles are always attracted to stop points, then the magnet is firmly held, but excessive force is required to rotate the magnet in reverse direction
Solution Approach 1:
The magnetic attraction is made periodic through rotational movement, where poles are attracted to stop points only during specific phases of rotation. During other phases, the poles are naturally repelled or neutral, creating periodic windows of low resistance that allow easy rotation while maintaining firm holding during stable positions
Solution Approach 2:
The magnetic holding force is dynamically modulated through rotation, transitioning from static continuous attraction to dynamic periodic attraction. This allows the system to maintain reliable holding during stable positions while enabling easy transitions during rotational movement through alternating attraction and repulsion phases
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 device achieves higher power generation efficiency with reduced operating force requirements, enabling easy operation and increased induced electromotive force through enhanced magnetic flux change.
Implementation Method 1
The electromotive force is generated in the coil from the change of magnetic flux in the core when the magnet is interposed in the space and change of the magnetic flux in the core when the magnet is withdrawn from the space
Implementation Method 2
a first magnetization member that is fixed at the first magnetization surface and formed of a magnetic material, and a second magnetization member that is fixed at the second magnetization surface and formed of the magnetic material
Data Source
AI summary
First and second opposing ends are formed in a magnetic path forming member on which a power generation coil is wound. A rotating body has a permanent magnet, a first magnetization member and a second magnetization member. When an operating force does not act on an operating member, an end surface of the first magnetization member is opposed to the first opposing end via a gap and an end surface of the second magnetization member is opposed to the second opposing end via a gap. When the operating member is pressed, the rotating body rotates and when the force to the operating member is released, the operating member and the rotating body return. Since the rotating body and the magnetic path forming member do not come into contact with each other, the force required to operate the operating member is relatively weak and large electromotive force can be obtained.