Induction Heating Power Protection System Adaptive Reset
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Solution Overview
Problem
Existing power system protection systems are often too slow to protect high-speed components from damage due to temporary unusual operating conditions, and they lack adaptive mechanisms to minimize service interruptions while ensuring reliable operation, especially in systems with limited margins and cost constraints.
Innovation Solution
A protection system that employs an adaptable algorithm to sense threat conditions, adjust reset times, and vary disable intervals based on thermal overload characteristics, temperature sensors, and operational history to ensure the briefest possible service interruptions, with the option to enter a persistent protective mode after manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-resettable fuses, circuit breakers or self resetting components are used, then fire hazard is reduced, but the protection speed is too slow for high speed power components
Solution Approach 1:
The protection system dynamically adjusts the reset delay time based on the type and severity of the fault condition detected. The controller can vary the wait period before attempting reset, optimizing between quick recovery for minor issues and longer delays for more serious conditions, thus adapting the protection response to match the actual threat level.
Solution Approach 2:
The system continuously monitors power component characteristics and provides feedback to the controller. When a fault condition is detected, the controller uses this feedback to determine appropriate protective action and reset timing, creating a closed-loop system that responds appropriately to actual operating conditions rather than using fixed timing.
2Reliability
If electronic shutdown with manual reset is used, then high speed power components are protected, but service interruption time increases
Solution Approach 1:
The protection system automatically performs reset operations without requiring manual intervention. When a fault condition clears, the controller automatically attempts to reset the protection circuitry and resume normal operation, eliminating the need for manual reset actions and reducing service interruption time.
Solution Approach 2:
The system implements periodic reset attempts with configurable delay intervals. Instead of requiring manual intervention, the controller automatically attempts reset after a determined wait period, and can continue attempting periodic resets until success or until a persistent fault condition is confirmed.
3Ease of operation
If fixed reset timing is used, then system operation is simplified, but service interruption cannot be minimized based on actual conditions
Solution Approach 1:
The protection system dynamically adjusts the reset delay time based on the type and severity of the fault condition detected. The controller can vary the wait period before attempting reset, optimizing between quick recovery for minor issues and longer delays for more serious conditions, thus adapting the protection response to match the actual threat level.
Data Source
AI summary
When a power system experiences a disruptive event, conditions may exist that threaten the survival of power devices used in the system. Embodiments described herein provide an improved means of protecting these devices under such circumstances.