Phase shift control for multi-phase parallel LLC voltage-fed inverter

A novel approach to regulate and control the inverter output power by controlling the phase shift between multi-inverters, and to enhance the inverter capacity by parallel connection multi-phase LLC voltage-fed inverters, is presented. The output power equation is given and a two-phase parallel LLC voltage-fed resonant power prototype is designed and validated. The experimental results validate the proposed approach and confirm the inverter´s digitisation, high-frequency and high-capacity characteristics.