Adaptive Overcurrent Protection Using Real-Time Filter Modeling
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Solution Overview
Problem
Existing overcurrent protection circuitry in electronic systems relies on static models with assumed component values, which become inaccurate due to tolerances and variations over time, leading to decreased accuracy and increased susceptibility to overcurrent conditions.
Innovation Solution
The implementation of dynamically determined coefficients for a transfer function, allowing the protection circuitry to adjust based on real-time signals and variations in filter circuitry impedance, thereby improving the accuracy of overcurrent detection and prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If static models with assumed component values are used in overcurrent protection circuitry, then device complexity is reduced and ease of manufacture is improved, but measurement precision deteriorates and reliability worsens due to tolerances and variations over time
Solution Approach 1:
The patent applies dynamics by transitioning from static assumed component values to dynamic real-time measurement of voltages and currents. The system continuously monitors actual operating conditions and updates the transfer function coefficients accordingly, allowing the protection circuitry to adapt to component variations and environmental changes over time, thereby maintaining high measurement precision without excessive complexity
Solution Approach 2:
The patent implements feedback by measuring actual voltages and currents in the circuit and using these measurements to determine transfer function coefficients. The system feeds back the measured values to continuously update the protection model, ensuring that the overcurrent detection remains accurate despite component tolerances and aging effects
2Reliability
If static models with assumed component values are used, then ease of manufacture is improved, but reliability deteriorates due to decreased accuracy and increased susceptibility to overcurrent conditions
Solution Approach 1:
The patent applies self-service by enabling the protection circuitry to automatically characterize its own operating conditions through real-time measurement. The system self-adjusts the transfer function coefficients based on actual measured voltages and currents, eliminating the need for manual calibration or complex manufacturing processes while improving reliability
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting the transfer function coefficients based on measured circuit conditions. Instead of relying on fixed assumed values, the system changes the parameters (voltages, currents, coefficients) in real-time to reflect actual operating conditions, thereby improving reliability without significantly increasing manufacturing complexity
Data Source
AI summary
An example apparatus includes: programmable circuitry configured to execute machine-readable instructions to: receive first voltages representative of an input signal; receive second voltages and currents, the second voltages and currents representative of voltages and currents of filter circuitry responsive to the first voltages; and determine a transfer function based on the first voltages and the second voltages and currents, the transfer function having coefficients representing the filter circuitry.