Capacitor Voltage Adjustment for Service Life Extension
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Solution Overview
Problem
Existing energy storage solutions for electrical mechanisms, such as mechanical springs, require larger motors and gears due to the need for additional load during fail-safe conditions, and capacitive energy storage technologies face challenges in maintaining performance over time due to capacitance degradation and voltage limitations.
Innovation Solution
A capacitive power system utilizing an ultra or super capacitor with a high capacitance value, where the working voltage is initially set low to maximize service life and gradually increased as capacitance decreases, with real-time monitoring and management to ensure sufficient energy storage for fail-safe conditions, and automatic discharge or charge cycles based on power availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the working voltage is set low to maximize service life, then the service life is extended, but the energy storage capacity decreases
Solution Approach 1:
The patent implements dynamic voltage adjustment where the working voltage of the capacitor is not fixed but gradually increased over time to compensate for capacitance degradation. The controller monitors capacitance levels and adjusts the voltage threshold accordingly, transforming a static voltage setting into a dynamic parameter that adapts to the capacitor's aging state, thereby resolving the contradiction between extending service life and maintaining energy storage capacity
Solution Approach 2:
The patent changes the operating parameters of the capacitor by adjusting the working voltage threshold based on the capacitor's actual capacitance state. As capacitance decreases with age, the controller increases the voltage threshold to maintain sufficient energy storage (E=1/2CV²), effectively changing the operational parameters to compensate for component degradation and resolve the trade-off between service life and energy capacity
2Duration of action of stationary object
If the capacitance decreases with age, then the service life is extended through voltage compensation, but the energy storage capacity is reduced
Solution Approach 1:
The patent employs a feedback control mechanism where the controller continuously monitors the capacitor's capacitance and adjusts the working voltage threshold accordingly. This closed-loop feedback system detects capacitance degradation and compensates by increasing the voltage threshold, ensuring that the capacitor maintains sufficient energy storage capacity throughout its extended service life, thus resolving the contradiction between service life extension and energy storage maintenance
3Reliability
If a mechanical spring is used for fail-safe conditions, then the fail-safe function is achieved, but larger motors and gears are required
Solution Approach 1:
The patent replaces the mechanical spring-based fail-safe system with an electrical capacitor-based energy storage system. Instead of using mechanical potential energy stored in a spring, the system uses electrical energy stored in a capacitor to power the fail-safe function. This substitution eliminates the need for oversized motors and gears required to compress the spring during normal operation, thereby reducing device complexity while maintaining reliability
Solution Approach 2:
The patent implements periodic charging of the capacitor during normal operation when power is available, and periodic discharging when fail-safe operation is needed. This periodic action allows the system to accumulate energy gradually during normal operation and release it only when required, avoiding the continuous mechanical load that would require larger motors and gears in a spring-based system
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 approach extends the service life of capacitors by maintaining sufficient energy storage capacity while minimizing voltage stress, ensuring reliable fail-safe operations for electrical mechanisms and optimizing energy transfer during power interruptions.
Implementation Method 1
an ultra or super capacitor with high capacitance. A predetermined amount of energy may be stored in the capacitor
Implementation Method 2
a discharge of the capacitor may be initiated to transfer energy to the mechanism
Data Source
AI summary
A capacitive power system having a service life extending approach. The system may have an ultra or super capacitor with high capacitance. A predetermined amount of energy may be stored in the capacitor, sufficient for providing power to an electrically powered mechanism in the event the mechanism loses its power, to place it in a fail safe condition. With the capacitor at an initial capacitance, the working voltage may be set as low as possible while still retaining sufficient capacity for storing the predetermined amount of energy. As the capacitor's capacitance decreases with age, the working voltage of the capacitor may be gradually increased to compensate for lost capacitance. If the mechanism loses power, then a discharge of the capacitor may be initiated to transfer energy to the mechanism. If the electrical mechanism has power, then a charging of the capacitor may be initiated to transfer energy to the capacitor.