Electrical Part Thermal Monitoring for Separated Heating Profiles
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Solution Overview
Problem
Existing thermal monitoring methods in electrical systems are inadequate for accurately detecting thermal issues due to variable heating conditions, leading to potential overheating and failure, as they rely on fixed temperature thresholds that fail to distinguish between self-heating and surrounding heating contributions.
Innovation Solution
A method involving obtaining and analyzing temperature profiles using a single measurement device to differentiate between self-heating and surrounding heating contributions by fitting measured data to exponential functions, allowing for precise determination of self-heating through characteristic temperature profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fixed temperature thresholds are used for thermal monitoring, then the monitoring approach is simple, but the detection accuracy is insufficient due to variable heating conditions
Solution Approach 1:
The patent segments the temperature monitoring task into two distinct components: self-heating temperature (T1) and surrounding heating temperature (T2). By separating these overlapping thermal effects, the system can accurately attribute temperature changes to their respective sources, enabling precise detection of thermal issues without requiring complex multi-sensor arrangements.
Solution Approach 2:
The patent changes the monitoring parameter from a single fixed temperature threshold to a dual-parameter model (T1 and T2) that dynamically adapts to variable heating conditions. This allows the system to distinguish between normal self-heating and abnormal surrounding heating, significantly improving detection accuracy under varying operational conditions.
2Device complexity
If a single measurement device is used, then the device complexity is reduced, but the ability to distinguish self-heating from surrounding heating is limited
Solution Approach 1:
The patent applies dynamic analysis by monitoring temperature changes over time and using the temporal characteristics of heating processes to distinguish between self-heating and surrounding heating. The system solves a system of differential equations that models the dynamic thermal behavior, enabling accurate separation of T1 and T2 using only a single measurement device.
Solution Approach 2:
The system uses feedback from the single temperature measurement to continuously update the thermal model and refine the separation of self-heating and surrounding heating components. By feeding the measured temperature data back into the differential equation solver, the system iteratively improves its estimation of T1 and T2, achieving high measurement precision with minimal hardware.
3Ease of operation
If fixed temperature thresholds are applied, then the monitoring method is straightforward, but it cannot track degradation or aging of electrical parts
Solution Approach 1:
The patent establishes baseline thermal characteristics (T1 and T2 profiles) during normal operation before degradation occurs. By having these reference profiles in advance, the system can compare future measurements against them to detect deviations that indicate aging or degradation, enabling proactive maintenance while maintaining a straightforward monitoring approach.
Solution Approach 2:
The system continuously compares real-time thermal measurements against established baselines and provides feedback on degradation trends. This enables the system to track changes in electrical part condition over time, identifying aging and potential failures before they occur, while maintaining operational simplicity through automated analysis.
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
Enables accurate assessment of the health status of electrical components by distinguishing self-heating from surrounding heating, facilitating timely maintenance and preventing failures by leveraging physical measurement data for reliable condition monitoring.
Implementation Method 1
a first temperature of the electrical part over time relating to a self-heating due to resistive loss of the electrical part
Implementation Method 2
at least a second temperature over time relating to a heating due to resistive loss of a surrounding portion of the electrical system
Data Source
AI summary
A method includes obtaining measurement data indicative of a measured temperature profile at a position of an electrical part based on a first temperature of the electrical part over time relating to a self-heating due to resistive loss of the electrical part, and at least a second temperature over time relating to a heating due to resistive loss of a surrounding portion of the electrical system; obtaining characteristic data of the electrical part comprising at least one characteristic temperature profile of a temperature of the electrical part over time due to the self-heating of the electrical part or of a temperature of the electrical part over time due to the heating of the surrounding portion; and determining the first temperature of the electrical part over time based on the measurement data and the characteristic data.