Electret Power Generator Using Residual Polarization Without Vibration
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Solution Overview
Problem
Conventional vibration-powered generators using electrets cannot generate power when external kinetic energy, such as vibration, is not input, limiting their use environment and requiring complex electrode configurations and support structures.
Innovation Solution
A power generator configuration that includes an electret with a first and second charged surface, a first electrode partially exposed on the first charged surface, and a third electrode facing the first charged surface, forming two power generating units connected to a power storage or output unit, utilizing an inorganic dielectric material with a bandgap energy of 4 eV or more to achieve high surface potential and charge collection even without external energy input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional vibration-powered generators using electrets are used, then power can be generated through electrostatic induction, but power generation stops when external kinetic energy (vibration) is not input
Solution Approach 1:
The electret surface is divided into multiple charged regions with different polarities, creating multiple power generating units that can operate independently or in combination, enabling power generation through various mechanisms including residual polarization
Solution Approach 2:
The electret is pre-charged to create residual polarization that can generate power without requiring external vibration input, allowing the generator to function in static conditions as well as dynamic conditions
2Power
If conventional electret configurations are used, then power generation is achieved, but complex electrode configurations and support structures are required
Solution Approach 1:
The patent extracts and utilizes the residual polarization charge directly from the electret surface without requiring complex electrode structures, simplifying the overall device configuration while maintaining power generation capability
Solution Approach 2:
The electret serves multiple functions: it provides the charged surface for electrostatic induction, maintains residual polarization for static power generation, and works with simplified electrodes to create multiple power generating units, reducing the need for separate components
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
Enables efficient power generation and supply by leveraging residual polarization and charge transfer on the electret's exposed surface, allowing power generation even without external vibration input, with a relatively simple configuration.
Implementation Method 1
The electret is formed by polarizing an electret material that includes an inorganic dielectric having a bandgap energy of 4 eV or more
Implementation Method 2
practical application of an energy harvesting element using electrostatic induction of an electret has been studied
Data Source
AI summary
A power generator includes an electret including a first charged surface and a second charged surface having opposite polarities, a first electrode partially formed on the first charged surface, a second electrode formed on the second charged surface, a third electrode disposed to face the first charged surface with a space, and at least one of a power storage unit or an output unit. The first charged surface has a current collecting surface that is exposed outward. The first electrode and the second electrode form a first power generating unit and the third electrode and the second electrode form a second power generating unit. The electret is formed by polarizing an electret material that includes an inorganic dielectric having a bandgap energy of 4 eV or more.