Abstract:
This project introduces critical-conduction-mode-based modulation for three-phase bidirectional ac-dc converters. This modulation reduces switching frequency variation, achieves zero-voltage-switch soft switching, and reduces switching-related loss, which is especially beneficial for systems operating above hundreds of kHz with wide-band-gap power semiconductor devices to achieve high power density and efficiency.
A 25 kW silicon carbide-based high-frequency three-phase bidirectional ac-dc converter prototype is designed to achieve 127 W/in3, five times higher than commercial products.
One low-cost microcontroller digitally implements all control functions, and this prototype experimentally verifies the benefits in inverter and rectifier modes. Even at high switching frequencies above 300 kHz, this prototype’s peak efficiency is close to 99.0% with soft-switching modulation.
Note: Please discuss with our team before submitting this abstract to the college. This Abstract or Synopsis varies based on student project requirements.
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