Vibration Power Generator with Annular Coil and Segmented Magnets
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Solution Overview
Problem
Existing vibration power generators face limitations in maximizing electric energy generation from environmental vibrations due to suboptimal magnetic flux linkage, which restricts their efficiency and power output.
Innovation Solution
The vibration power generator design incorporates a unique configuration of magnets and a magnetic yoke system, along with an elastic member, to enhance magnetic flux linkage, including a mover with multiple magnets and a yoke structure that surrounds them, and an annular coil positioned between the magnets, allowing for increased magnetic flux interlinkage and power generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional single magnet configuration is used, then the device complexity is low, but the magnetic flux linkage is insufficient leading to low power generation efficiency
Solution Approach 1:
The mover is divided into multiple magnetic elements (first magnet, second magnet, third magnet) arranged at different positions. Each magnet interacts with the coil to generate electromagnetic force, and the segmentation allows the system to harness vibrations from multiple directions and frequency ranges simultaneously, thereby improving power generation efficiency without requiring a single complex magnet structure
Solution Approach 2:
The first magnetic yoke surrounds the first magnet, the second magnetic yoke surrounds the second magnet, and the third magnetic yoke surrounds the third magnet. This nested configuration concentrates magnetic flux within each yoke-magnet assembly, enhancing the magnetic flux linkage with the coil while maintaining a compact overall structure that does not excessively increase device complexity
2Productivity
If magnets are positioned to maximize magnetic flux linkage, then power generation efficiency improves, but the generator can only effectively harness vibrations within a narrow frequency band
Solution Approach 1:
Multiple magnets are positioned at different locations within the mover (first magnet with first yoke, second magnet with second yoke, third magnet with third yoke), allowing each magnet-yoke assembly to respond to vibrations of different frequencies and directions. This segmentation enables the generator to effectively harness a wider frequency band of environmental vibrations while maintaining good magnetic flux linkage through each individual assembly
Solution Approach 2:
The magnetic elements are arranged in three-dimensional space with different orientations and positions. The first, second, and third magnets are placed at different locations and can respond to vibrations from different directions, adding spatial dimensionality to the vibration harvesting capability and expanding the effective frequency band without compromising magnetic flux linkage
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 significantly increases the magnetic flux linkage, leading to improved power generation efficiency and the ability to harness energy from a wider frequency band of external vibrations, enhancing the generator's overall performance.
Implementation Method 1
The mover makes a motion relative to the coil when external vibration has been applied to the vibration power generator. At this time, the magnetic flux linkage varies over time, whereby an electromotive force is generated.
Data Source
AI summary
According to one embodiment, a vibration power generator includes a housing, an elastic member, a mover, and a coil. The elastic member is fixed to the housing. The mover is supported by the elastic member and able to vibrate in a first direction. The coil is positioned inside the mover. The mover includes a first magnet, a second magnet, a third magnet, and a first magnetic yoke. The second magnet is placed to be aligned with the first magnet in the first direction so as to repel each other. The third magnet is placed annularly with respect to the first magnet and the second magnet. The first magnetic yoke surrounds the first magnet, the second magnet and the third magnet. The coil is positioned between the third magnet, and both the first magnet and the second magnet.