Inductor Deterioration Detection via Parallel Resistance Measurement
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Solution Overview
Problem
There is a need for an effective method to determine the deterioration of inductors, which is crucial for ensuring the reliability of inductors in modern devices, as existing methods lack accuracy in assessing their performance and reliability before delivery or integration.
Innovation Solution
An apparatus and method that utilize a detector to measure the parallel resistance component of an inductor and apply an impulse voltage to determine its satisfactory state by comparing the response signal with a reference signal, considering the change in parallel resistance component, and determining the magnitude of the impulse voltage based on the inductor's characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing checking methods are used for inductors, then the checking process is simple, but the accuracy in determining inductor deterioration is insufficient
Solution Approach 1:
The checking apparatus segments the inductor evaluation into multiple independent measurement components: parallel resistance component detection, series resistance component detection, and inductance component detection. Each component is measured separately using dedicated detection circuits, allowing for precise deterioration assessment while maintaining modular system complexity
Solution Approach 2:
The apparatus introduces an intermediary processing unit that receives detection signals from multiple detection circuits and integrates them into a comprehensive deterioration determination. This intermediary layer coordinates the complex measurements and reference value comparisons, managing system complexity while enabling accurate multi-parameter assessment
2Reliability
If impulse voltage is applied to test inductor withstand voltage characteristics, then the reliability assessment is improved, but the risk of damaging the inductor increases
Solution Approach 1:
The apparatus performs preliminary measurements of the inductor's parallel resistance, series resistance, and inductance before applying impulse voltage. These baseline measurements establish reference values that allow the system to assess withstand voltage characteristics while monitoring for deterioration, enabling reliable testing without excessive damage risk
Solution Approach 2:
The checking apparatus implements feedback mechanisms where detection signals from resistance and inductance measurements are continuously monitored during and after impulse voltage application. This feedback allows the system to adjust testing parameters and determine satisfactory status based on actual inductor response, improving reliability assessment while preventing damage through real-time monitoring
3Measurement precision
If multiple parameters are measured to accurately assess inductor deterioration, then the measurement precision is improved, but the checking time increases
Solution Approach 1:
The apparatus uses periodic action by applying impulse voltage signals at specific intervals and measuring the inductor's response at defined time points. This periodic measurement approach efficiently captures the inductor's transient and steady-state characteristics across multiple parameters without requiring continuous monitoring, reducing checking time while maintaining precision
Solution Approach 2:
The system applies partial action by selectively measuring and comparing specific parameters (parallel resistance, series resistance, inductance) against reference values based on the inductor's application requirements. This selective measurement approach achieves sufficient determination accuracy without unnecessarily measuring all possible parameters, optimizing checking 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 approach allows for accurate and reliable identification of inductor deterioration, ensuring the inductor's withstand voltage characteristics meet the required standards, thereby enhancing the reliability of inductors in electronic devices.
Implementation Method 1
The detector may apply an impulse voltage to one end of the target inductor, receive a response signal from another end of the target inductor
Data Source
AI summary
An apparatus for checking an inductor includes a detector outputting a detection signal including information corresponding to a parallel resistance component of a checking target inductor; and a determiner receiving the detection signal and determining whether the checking target inductor is satisfactory based on a magnitude of the parallel resistance component.