Dc-Ac Conversion Without Reversal TRIZ Cases
- Fault-Tolerant Power Converter Using Zero-Voltage Phase Bypass
When a switching element fails, the controller forces the affected bridge phase to zero voltage so AC power continues without spare inverters.
- Reverse Converter Voltage Correction for DC Component Elimination
Voltage-divider ratio errors can leave DC offsets in three-phase signals; this case removes them to keep reverse converter control accurate.
- Cascaded PWM Converter Control for Low-Loss Harmonic Reduction
A cascaded PWM scheme uses higher-frequency converter cells to correct voltage error, cutting losses and harmonics without large filters.
- Modular Converter Topology for Low-Frequency Voltage Shaping
A resonant energy-transfer path moves storage to the DC link capacitor, shrinking cell capacitors while preserving low-frequency output quality.
- Phase-Shifted PWM Carrier Shaping for MMC Load Balancing
Modified phase-shifted PWM carriers let modular multilevel converters balance charge, load, and temperature despite module impedance differences.
- NPC Inverter Control Mode Switching for Transistor Overcurrent Protection
Abnormal-state detection switches an NPC inverter to a mode that turns off vulnerable transistors and prevents damaging overcurrent.
- State-Observer DC-AC Inverter Control Without Current Sensors
A state observer estimates ripple-free capacitor and load currents, removing sensor delay and hardware failures in DC-AC inverter control.
- Power Converter Communication Split for Fast Low-Cost Control
Optical fiber carries time-critical switching commands while wireless returns unit status, cutting cabling cost without slowing converter control.