One-Cycle Control with Composite Function Embedded for Boost Converters

It has been confirmed that a larger stability domain has more advantages for system operation. In this paper, a novel one-cycle control (OCC) embedded with a composite function is proposed. Its control principle is based on maintaining the symmetry of the volt-second value for the inductor in each cycle. Then, selecting the reference voltage as the study variable, the stability boundaries and identify stable parameter domains are studied by establishing a state-space average model. The results demonstrate that, compared with the conventional OCC, the proposed OCC with composite function u embedded achieves an expanded stable parameter domain, effectively delaying the occurrence of instability phenomena from uref=2uin to uref=3uin. Both the simulation and experimental results conclusively validate the theoretical analysis, confirming the effectiveness and superiority of the proposed control strategy.