Electret Generator Rotor Support for Stable Electrode Gaps
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Solution Overview
Problem
Existing electric generators face challenges in efficiently generating electricity due to the difficulty in reducing the distance between electret electrodes and electrodes without them coming into contact, exacerbated by issues like low flatness of substrates and potential warping.
Innovation Solution
The electric generator design includes a rotating plate with a silicon substrate, an electret film, and electrodes positioned on bases, with a shaft featuring grooves and beams that securely hold the rotating plate, maintaining optimal distance and preventing contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the distance between the electret electrode and the electrode is reduced to improve power generation efficiency, then the power generation efficiency is improved, but the risk of contact between the electret electrode and the electrode increases
Solution Approach 1:
A support structure comprising a shaft and multiple beams is introduced as an intermediary between the rotating plate and the base. The shaft extends along the rotation axis, and beams connect the rotating plate to the shaft, providing stable support and maintaining a controlled gap between the electret electrode and the electrode, thus preventing direct contact while enabling close proximity for efficient power generation.
Solution Approach 2:
The rotating plate is made of silicon substrate material, which provides high flatness and dimensional stability. This material choice ensures that the rotating plate maintains its shape under operational conditions, preventing warping that could cause electrode contact, while still allowing the structure to be positioned close to the base for efficient power generation.
2Manufacturing precision
If the substrate flatness is improved to maintain consistent electrode distance, then the electrode distance consistency is improved, but the manufacturing complexity increases
Solution Approach 1:
The support structure is segmented into multiple independent components: a shaft and multiple beams. This segmentation allows each component to be manufactured separately with standard precision, and then assembled together. The beams are arranged in a circular pattern and connected to the shaft, providing distributed support that maintains rotating plate flatness without requiring the entire substrate to be manufactured with extreme precision.
Solution Approach 2:
The design changes the structural parameters by introducing a multi-component support system with specific geometric arrangements. The beams are positioned at predetermined intervals around the rotating plate, and their dimensions and spacing are optimized to provide adequate support while maintaining simplicity in individual component manufacturing. This approach achieves high flatness through structural design rather than relying solely on substrate manufacturing precision.
3Stability of the object's composition
If the rotating plate is securely fixed to the shaft to prevent warping, then the mechanical stability is improved, but the ease of assembly and disassembly deteriorates
Solution Approach 1:
The connection between the rotating plate and shaft is designed to be dynamically stable during operation but easily adjustable during assembly. The beams provide continuous support that prevents warping and maintains mechanical stability during rotation, while the modular beam structure allows for simple installation and removal. The shaft features grooves that engage with the beams, providing stable positioning without permanent fixation.
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 enhances the efficiency of electric power generation by maintaining a consistent, optimal distance between electrodes, reducing the risk of contact and improving mechanical stability, thereby increasing the generator's efficiency.
Implementation Method 1
an electret film disposed on one of the rotating plate and the first base to face the other of the rotating plate and the first base
Data Source
AI summary
An electric generator includes a shaft, a rotating plate including a silicon substrate having an insertion hole that receives the shaft, a first base facing the rotating plate, an electret film disposed on one of the rotating plate and the first base to face the other of the rotating plate and the first base, and a first electrode disposed on the other of the rotating plate and the first base to face the electret film. The shaft has at least one groove extending in an axial direction, and the rotating plate has first beams each extending from an outer periphery of the insertion hole to an interior of the insertion hole and having a tip in the at least one groove and a second beam located between the first beams and having a tip that presses the shaft.