Reactor and Smoothing Capacitor Deterioration Detection During Charging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing technologies are inadequate for determining the deterioration of passive elements in power conversion devices, specifically aluminum electrolytic capacitors, and cannot effectively assess the condition of other passive elements like reactors and smoothing capacitors.
Innovation Solution
A deterioration determination device that includes a storage unit for charge determination values and a calculation unit to assess voltage changes and charging times of smoothing capacitors and reactors, determining deterioration based on these parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If humidity-based diagnosis is used for aluminum electrolytic capacitors, then capacitor deterioration can be determined, but deterioration of other passive elements like reactors and smoothing capacitors cannot be assessed
Solution Approach 1:
The patent applies universality by creating a single determination device that can assess multiple types of passive elements (aluminum electrolytic capacitors, reactors, and smoothing capacitors) using a unified voltage change measurement approach. The device measures voltage changes across different components during power supply operations and compares them against stored determination values specific to each component type, enabling one device to perform multiple diagnostic functions that were previously component-specific.
2Measurement precision
If component-specific diagnosis methods are used, then accurate deterioration determination for each component type is achieved, but a separate diagnosis system is needed for each passive element
Solution Approach 1:
The patent applies merging by consolidating multiple component-specific diagnosis functions into a single integrated determination device. The device includes a storage unit that holds determination values for different component types and a determination unit that can identify various passive elements and apply appropriate diagnostic criteria. This unified approach combines what were previously separate diagnosis systems into one device, reducing overall system complexity while maintaining component-specific accuracy through differentiated measurement thresholds and evaluation methods.
Data Source
AI summary
A deterioration determination device that determines deterioration of a reactor and a smoothing capacitor included in a power conversion device, includes: a storage unit that stores a charge determination value based on a voltage change when the smoothing capacitor with no deterioration is charged by a power source electric power supplied through the reactor with no deterioration; and a calculation unit that determines at least one of the reactor and the smoothing capacitor has deteriorated when the voltage change the smoothing capacitor during charging by the power source electric power supplied through the reactor is larger than the charge determination value.