Power Supply Circuit Temperature Estimation for Transient Fault Detection
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Solution Overview
Problem
Existing thermal management systems struggle to accurately measure transient temperatures of circuit components in real-time, leading to inefficiencies and potential failures due to reliance on steady-state temperature measurements.
Innovation Solution
A power supply device with a circuit measuring device and computing circuit that uses a deflection model to simulate transient temperatures based on voltage, current, and coolant flow rate measurements, allowing for real-time abnormality detection and reducing computing requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If steady-state temperature measurement is used, then the measurement device can measure overall operating temperature, but it cannot detect transient temperature of core circuit at specific moment
Solution Approach 1:
The patent replaces physical temperature sensors with a computational model that calculates transient temperature based on electrical parameters (voltage, current, power). Instead of using complex thermal measurement hardware to directly measure transient temperature, the system substitutes a mathematical deflection model that infers temperature from easily measurable electrical quantities, thereby achieving high measurement precision without increasing device complexity
Solution Approach 2:
The patent introduces a deflection model as an intermediary between electrical parameter measurements and temperature determination. This model acts as a computational mediator that transforms voltage, current, and power data into transient temperature estimates, enabling indirect but accurate temperature measurement without requiring direct thermal contact or complex sensor arrays
2Measurement precision
If complex thermal models are used to calculate transient temperature, then accurate temperature measurement can be achieved, but computing performance requirements increase
Solution Approach 1:
The patent transforms the thermal modeling approach by changing the input parameters from complex thermal field data to simple electrical parameters (voltage, current, power). The deflection model uses these easily acquired electrical measurements as inputs, eliminating the need for computationally intensive thermal simulations while maintaining accurate transient temperature calculation
Solution Approach 2:
The patent extracts only the essential parameters needed for transient temperature calculation from complex thermal models. Instead of using full thermal field simulations, the system extracts and utilizes only voltage, current, and power parameters that directly influence temperature, removing unnecessary computational complexity while preserving measurement accuracy
3Measurement precision
If full thermal parameters are measured and calculated, then complete thermal analysis can be performed, but production cost increases
Solution Approach 1:
The patent makes existing electrical measurement circuits serve multiple functions: they simultaneously measure voltage, current, and power for both operational control and transient temperature calculation. This multi-functionality eliminates the need for separate temperature sensing hardware, reducing production costs while maintaining accurate temperature measurement capability through the deflection model
Data Source
AI summary
A power supply device includes an operating circuit, a circuit measuring device and a computing circuit. The circuit sensing device is configured to continuously sense the operating circuit and obtain a data that varies over time. The computing circuit is coupled to the circuit measuring device. The computing circuit is configured to: receive the data of the operating circuit; provide the data into a deflection model to obtain a simulated temperature of the operating circuit; and determine whether the operating circuit is abnormal according to the simulated temperature. The deflection model is established through a deflection operation according to a plurality of physical parameters of the operating circuit.