Current Providing Circuit Counter Logic for Overcurrent Protection
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Solution Overview
Problem
Existing current providing systems often misjudge the output current, leading to premature shutdown of the power supplying circuit due to noise or other reasons, causing operational disruptions.
Innovation Solution
A current providing method and system that includes a power supplying circuit, a current sensing circuit, a number counting circuit, and a controller to detect if the output current exceeds a threshold, computing a counter value to determine if it's larger than a predetermined number, and controlling the power supplying circuit to decrease the current to a predetermined value, thereby preventing misjudgment and ensuring accurate timing for shutdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the detecting circuit directly turns off the power supplying circuit when current exceeds threshold, then the power supplying circuit is protected from overcurrent damage, but the circuit may be wrongly turned off due to noise or misjudgment
Solution Approach 1:
The patent applies preliminary action by introducing a counter that accumulates threshold exceedance events before triggering shutdown. Instead of immediate shutdown upon first threshold violation, the system counts multiple exceedances (N times) before activating protection, allowing temporary noise spikes to be filtered out while still protecting against sustained overcurrent conditions
Solution Approach 2:
The patent implements feedback by continuously monitoring the output current through the sensing circuit and using the counter's accumulated data to dynamically control the power supplying circuit. The detecting circuit receives feedback from the counter about how many times the threshold has been exceeded, and this feedback loop enables intelligent decision-making that balances protection with operational continuity
2Strength
If the power supplying circuit is turned off immediately when current exceeds threshold, then overcurrent damage is prevented, but normal operation is disrupted due to premature shutdown
Solution Approach 1:
The system performs preliminary counting of threshold exceedance events before executing shutdown. By requiring N consecutive or cumulative exceedances before triggering protection, the system ensures that only persistent overcurrent conditions (not transient noise) result in shutdown, thereby maintaining productivity while preserving overcurrent protection capability
Solution Approach 2:
The counter acts as a cushioning mechanism that absorbs temporary current spikes without triggering shutdown. This preliminary cushioning allows the system to tolerate normal operational variations and noise while still providing robust protection against genuine overcurrent faults that persist beyond the threshold N times
Data Source
AI summary
A current providing method utilized to a power supplying circuit, which provides an output current to a loading. The current providing method comprising: detecting if a current value of the output current is larger than a threshold current value; computing a number that the current value of the output current is larger than the threshold current value; determining if the number is larger or equal to a predetermined number; and controlling the power supplying circuit to decrease the output current to a predetermined current value if the number is larger or equal to the predetermined number.