Emergency Protection Detection TRIZ Cases
- Dual Fault Detector Circuit for Fast SiC MOSFET Protection
Dual detectors with different voltage thresholds and timing speed SiC MOSFET fault detection, limiting fault current and device stress.
- Shared Timer ESD Protection Circuit for Compact Semiconductor Pads
A shared timer lets two ESD protection circuits save chip area while preserving surge protection and pad-side electrical characteristics.
- Dual Bleeder CMTI Circuit for Oscillation Recovery in Isolators
A dual bleeder circuit detects oscillator stoppage during common-mode transients and restores oscillation to protect isolated data links.
- Backside ESD Protection Circuit With Shared Taps for Lower Clamping
Shared diode and clamp tap regions plus a backside conductive path reduce area and resistance for faster ESD discharge and lower clamping voltage.
- Single-Pole Transformer Closing Control for Inrush Reduction
Iterative single-pole closing tests different phase angles and selects a low-inrush transformer start-up point without remanent flux estimation.
- Transformer Closing Angle Selection for Lower Inrush Current
By testing different breaker closing angles at startup, this case reduces transformer inrush current without remanent flux estimation.
- Leadframe Fault Detection via Check Signal Injection
Injected check signals expose leadframe and power rail faults that voltage monitors miss, enabling fail-safe response without extra pins.
- Hybrid Circuit Breaker Topology for Selective AC/DC Fault Limiting
A parallel switching network selectively limits AC or DC fault current, keeping downstream loads energized and reducing downtime.
- Current Sense Protection Circuit for USB-C Short Detection
Voltage-difference detection flags shorts in the current sensing path, helping USB Type-C overcurrent protection avoid component damage.
- Analog Output Module Cutoff Switching for Accurate Fault Shutdown
Selective cutoff switching isolates load short-circuits while preserving analog voltage monitoring accuracy in industrial control outputs.
- Hybrid Protection Circuit Current Balancing in Parallel Conductor Paths
Electronic control units equalize current across parallel hybrid protection paths to raise current capacity and avoid overload aging.
- Underground Loop Transformer Switching for Fast Fault Isolation
Integrated vacuum interrupters and Rogowski coils isolate underground loop faults and restore service quickly without manual reconfiguration.
- Power Source Separation Circuit Temperature Sensing via Optical Isolation
Direct component temperature detection uses a comparator and insulating phototransistor to improve accuracy without extra sensors or added assembly complexity.
- Distributed Load Disconnect via Smart Meter Frequency Sensing
Grid frequency sensing in smart meters enables targeted load shedding and reconnection, reducing overload risk without broad service outages.
- Capacitor Divider ESD Trigger Circuit With Reduced IC Area
Series capacitors replace RC triggering to decouple rail transients, clamp ESD events, and save IC area without raising power use.
- Ground Impedance Monitoring for Permanent AC Earth Fault Detection
Periodic impedance checks across a line-to-ground capacitor detect broken or high-resistance earth connections and trigger timely alerts or power cut-off.
- Time-Admittance Switch Cascades for Inverter-Limited Fault Isolation
Cascade time-admittance switches isolate inverter-limited microgrid faults autonomously and support faster downstream power restoration.
- Contactor Economizer Failure Detection with BIT Hold Logic
Overcurrent monitoring and delay logic expose contactor economizer failures without premature de-energization, while BIT reports the fault.
- Recloser Lockout Control for Ongoing Low Fault Currents
Trip counters tracked across a longer time window let a recloser lock out persistent low fault currents and limit conductor damage.
- TVS Protection Branches for Surge Arrester Measurement Circuits
Parallel TVS branches shunt surge current to ground while preserving leakage current measurement in passive surge arrester monitors.
- AC Input Protection Using Voltage Frequency Analysis
Voltage frequency analysis detects excessive input current conditions in multi-phase AC equipment without added impedances or current sensors.
- Leakage Current Monitoring for Surge Arrester Disconnectors
Leakage current sensing reveals disconnector status remotely, reducing manual grid inspections and prolonged loss of surge protection.
- Solid-State Circuit Breaker Interlocking for Short-Circuit Failure Isolation
When a solid-state breaker fails short, it signals an upstream breaker to cut current so mechanical contacts can open safely with less load disruption.
- Programmable Current-Sensing Switch for Shared Tool Circuits
A microcontroller and current-sensing circuit manage startup spikes and delays so multiple shop tools can share one circuit without breaker trips.
- Acoustic Trip Detection in Electrical Enclosures With Noise Classification
Acoustic signatures and learned noise categories detect disconnection trips in electrical enclosures without costly radio systems or frequent false alarms.
- Hybrid DC Circuit Breaker Control for Sequential Fault Interruption
Sequentially turning off series semiconductor stages during UFMS opening cuts fault isolation time, limits peak fault current, and reduces arcing.
- Induction Cooker Pot Detection With Split Capacitor Noise Control
Split energy-storage capacitors limit transient current during pot detection, cutting induction cooker noise while preserving heating power.
- Miniature Circuit Breaker Trip Data Capture for Remote Diagnostics
Continuous waveform buffering and non-volatile trip logging let engineers diagnose circuit breaker field faults remotely without site visits.
- Open-Phase Detection Logic for Inverter-Based Power Delivery
Combining voltage unbalance, current, and harmonic distortion checks enables dependable open-phase detection and timely breaker control.
- Electromechanical Contactor Control Against High-Current Levitation
Current sensing boosts actuator force only during short-circuit peaks, preventing contactor levitation and unintended opening in high-voltage circuits.
- Medium-Voltage Recloser With Vacuum Switch Wear Reduction
A self-powered vacuum-switch recloser uses supercapacitor backup and cushioned fast contact motion to cut wear and restore medium-voltage lines automatically.