Power Supply Abnormality Detection via Voltage Threshold Switching
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Solution Overview
Problem
Existing power supply apparatuses for DC-DC converters face issues where determining abnormalities can lead to increased breakdown of components, particularly when a short-circuit breakage occurs, causing additional components to fail.
Innovation Solution
A power supply apparatus with a voltage detector, converter controller, and abnormality determiner that switches between normal, first abnormality determination, and second abnormality determination modes to assess voltage thresholds, preventing further component breakdown by controlling switch states and determining abnormalities without increasing the number of broken components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the converter controller continues to operate and the third switch remains ON when voltage exceeds the first threshold, then the abnormality determination can be performed, but the second switching element may break down due to short-circuit breakage of the first switching element
Solution Approach 1:
The patent applies preliminary anti-action by detecting voltage abnormalities and switching the third switching element OFF before the harmful effects of short-circuit breakage can propagate to the second switching element. The abnormality determiner detects when voltage exceeds the first threshold value and preemptively opens the third switch to block the harmful voltage propagation, thereby preventing component breakdown while maintaining abnormality determination capability.
Solution Approach 2:
The third switching element functions as an intermediary protective device between the first DC power supply and the second DC power supply. When abnormality is detected, it mediates by opening the circuit to isolate the harmful effects, allowing the system to determine abnormalities without causing cascading component failures.
2Object-affected harmful factors
If the third switching element is switched OFF to prevent component breakdown, then the number of broken components is reduced, but the power supply efficiency decreases
Solution Approach 1:
The patent applies dynamics by making the third switching element's state variable rather than fixed. It dynamically switches between ON and OFF states based on real-time voltage monitoring and abnormality detection, allowing the system to optimize between protection and efficiency by being conductive during normal operation and isolating only when necessary.
Solution Approach 2:
The system changes the operational parameters of the third switching element based on detected voltage conditions. During normal operation, the switch remains closed with low resistance for efficient power transfer. When voltage exceeds thresholds, the switch opens to change the electrical parameter state, preventing component breakdown while minimizing energy loss by only switching when abnormality is confirmed.
Data Source
AI summary
An abnormality determiner turns OFF a third switch and controls a converter controller to stop operating in a case where a voltage value detected by a voltage detector during a normal mode exceeds a first threshold value. The abnormality determiner determines that a first switch has an abnormality in a case where the voltage value exceeds a second threshold value in a state where the converter controller is stopped. The abnormality determiner controls the converter controller to operate in a case where the voltage value is equal to or smaller than the second threshold value in a state where the converter controller is stopped. The abnormality determiner determines that the converter controller has an abnormality in a case where the voltage value exceeds a third threshold value in a state where the converter controller is operated.