Dynamic Guard Electrode Vibration Power Generator
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Solution Overview
Problem
Conventional vibration power generators with guard electrodes connected to GND result in low maximum electrostatic capacitance, leading to reduced output power.
Innovation Solution
A vibration power generator design where a third electrode is grounded when the overlap between the first and second electrodes is minimum and open when the overlap is maximum, allowing for increased change in electrostatic capacitance and output power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guard electrodes are connected to GND, then electric field control is improved, but maximum electrostatic capacitance is reduced
Solution Approach 1:
The patent applies the dynamics principle by making the connection state of the third electrode (guard electrode) changeable rather than fixed. The control unit dynamically switches the third electrode between connected and disconnected states based on the relative position between substrates, allowing the system to optimize between electric field control and capacitance maximization at different operational phases.
Solution Approach 2:
The patent implements periodic action through cyclic switching of the third electrode's connection state. During each vibration cycle, the control unit periodically connects the third electrode to GND when substrates are far apart (for electric field control) and disconnects it when substrates are close (for capacitance maximization), creating a rhythmic pattern that optimizes both contradictory requirements over time.
2Object-affected harmful factors
If guard electrodes are connected to GND, then electric field spread is limited, but output power is reduced
Solution Approach 1:
The patent applies the dynamics principle by making the connection state of the third electrode (guard electrode) changeable rather than fixed. The control unit dynamically switches the third electrode between connected and disconnected states based on the relative position between substrates, allowing the system to optimize between electric field control and capacitance maximization at different operational phases.
Solution Approach 2:
The patent implements periodic action through cyclic switching of the third electrode's connection state. During each vibration cycle, the control unit periodically connects the third electrode to GND when substrates are far apart (for electric field control) and disconnects it when substrates are close (for capacitance maximization), creating a rhythmic pattern that optimizes both contradictory requirements over time.
3Power
If electrostatic capacitance is increased, then output power is improved, but electric field control is worsened
Solution Approach 1:
The patent applies the dynamics principle by making the connection state of the third electrode (guard electrode) changeable rather than fixed. The control unit dynamically switches the third electrode between connected and disconnected states based on the relative position between substrates, allowing the system to optimize between electric field control and capacitance maximization at different operational phases.
Solution Approach 2:
The patent implements periodic action through cyclic switching of the third electrode's connection state. During each vibration cycle, the control unit periodically connects the third electrode to GND when substrates are far apart (for electric field control) and disconnects it when substrates are close (for capacitance maximization), creating a rhythmic pattern that optimizes both contradictory requirements over time.
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 increases the maximum electrostatic capacitance by 35% compared to conventional designs, enhancing the output power generation capability.
Implementation Method 1
an electrostatic induction vibration power generation device is known in which a charge is applied to one electrode of a variable capacitor and a charge is induced to the opposed other electrode by electrostatic induction
Implementation Method 2
a second substrate 16 having a plurality of electret material regions 15
Data Source
AI summary
A vibration power generator is provided that increases output power by improving the electrostatic capacitance when the area of the overlap between electret electrodes and counter electrodes is maximum while having the function of limiting the spread of the electric field from the electret electrodes. The vibration power generator is provided with: a first substrate and a second substrate configured so as to be relatively movable while keeping a condition of being separated so as to be opposed to each other; a first electrode formed on the first substrate; a second electrode formed on the second substrate so as to be opposed to the first electrode; and a third electrode formed in a region different from the first electrode on the first substrate, either one of the first electrode and the second electrode includes a film holding a charge, and when an overlap between the first electrode and the second electrode is minimum, the third electrode is grounded, and when the overlap between the first electrode and the second electrode is maximum, the third electrode is open.