To addresses the issue of loss imbalance in all-silicon carbide (SiC) device-based single-phase active neutral-point clamped three-level (ANPC-3L) inverter

we propose a modulation method for loss balancing and efficiency optimization based on soft-switching transition. Although the traditional two zero-level clamped loop conducting (TZCC) method effectively reduces conduction losses

its fixed allocation pattern of switching losses restricts further improvement in loss balancing performance. Based upon the TZCC method

this study introduces a sector division strategy based on voltage-current phase relationships. By dynamically reconstructing the driving sequence

switching losses are actively transferred from high-loss devices to low-loss devices

thereby achieving the goal of loss balancing. Simulation and experimental results demonstrate that the proposed method can be used to effectively improve the system loss distribution across a wide power range and under varying power factor conditions

fully leveraging the performance advantages of the all-SiC ANPC-3L circuit.