Ac-Dc Conversion Without Reversal TRIZ Cases
- DC Railway Transformer Tap Control for Load Voltage Stability
Dynamic tap changing on a DC railway transformer stabilizes rectifier output under load while avoiding costly thyristor or IGBT regulation.
- Power Factor Correction Circuit Using Resistor-Based Current Sensing
Branch and main-line sampling resistors replace costly Hall current sensors in a power factor correction circuit while preserving current sharing and harmonic control.
- Triple-Transformer GaN Gate Drive for Low-Power CMTI Immunity
A triple-transformer GaN gate drive cuts ON-phase loss, uses zero power in OFF state, and avoids CMTI-triggered false switching.
- Neutral Harmonic Rectification Circuit for Three-Phase AC Power
Filters and capacitors tied to neutral and ground attenuate odd-order harmonics in three-phase AC circuits, improving power factor and efficiency.
- Motor Drive Inverter Control for Vibration and Harmonic Balance
Limiting excitation current compensation cuts supply-current harmonics while reducing compressor vibration from motor torque pulsation.
- Neural-Network Power Regulator for Self-Tuning Converter Control
An ANN-based regulator blends learned correction with feedback control to cut converter tuning effort and maintain stable output as conditions change.
- Power Converter Input Capacitor Layout for Radiation Noise Reduction
Placing a noise-reducing capacitor between the rectifier and smoothing capacitor bypasses high-frequency noise and cuts radiation.
- Class-E Rectifier Capacitor Control for Thermal Impedance Stability
Drive frequency is adjusted from rectifier capacitor impedance changes to prevent overtemperature and stabilize voltage and current.
- DC Link Shutdown Circuit for Multi-Inverter Short-Circuit Protection
A coordinated shutdown circuit cuts current to all inverter DC links after one fault, preventing capacitor overvoltage and burst risk.
- Battery Pack Charger PAM Control for Low-EMI DC Output
By varying transformer-side voltage amplitude instead of switch duty cycle, this charger delivers variable DC output with higher efficiency and lower EMI.
- USB Power Interface Mains-Loss Detection via Transformer Monitoring
Transformer-based voltage threshold monitoring detects mains loss early, enabling USB-PD power-role swaps to protect data integrity.
- Power Converter Current Sensing via Auxiliary Transformer Winding
An auxiliary winding senses secondary current magnetically, avoiding shunt loss and bulky current transformers in LLC power converters.