3. Proposed control scheme
3.1. Conventional control scheme
The conventional double closed-loop controller is shown in Fig. 7, where the outer-loop controls the output voltage (vo) of the converter, while the inner-loop controls the inductor current (iL). The outer control loop produces the inductor current reference to be used in the inner control loop. The inner loop produces the duty cycle D for the converter. The feedback signals vo and iL are sent to the controller through low-pass filters (LPF). The lower and upper saturation limits for the are set to 0 and rated current of the converter, respectively. The duty cycle saturation limits are set to 0 and 1. The PI controllers are used in both the control loops to regulate the vo and iL.