As the capacitor current can respond to load fluctuations more rapidly than the peak inductor current, incorporating the capacitor current into the current control loop enhances the transient response in DC-DC converters as well as ensures over-current protection and noise immunity. This paper presents a comprehensive small-signal model (SSM) for a capacitor current ripple controlled (CCR) coupled inductor single-input dual-output (CI-SIDO) buck converter. The complete SSM is derived by unifying the developed SSM of the CCR controller with the SSM of the considered power converter using state-space averaging technique. In CCR control, the amalgamation of the comparator and SR flip-flop is accountable for producing the duty cycle. The proposed SSM is of immense usefulness in designing the outer loop controller, deriving switching instability conditions, and analyzing the dynamic characteristics of the capacitor current controlled CI-SIDO buck converter. To evaluate the advantages of this current controller to CI-SIDO buck converter, a load regulation analysis using the SSM of CCR controller is provided and thereafter verified through simulations in MATLAB/Simulink. It is observed that the low frequency gain of the cross and self regulation transfer functions is substantially less signifying promising dynamic and load disturbance rejection capability of the CCR control driven CI-SIDO buck converter.


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    Titel :

    Small Signal Modelling and Load Regulation Analysis of Capacitor Current Ripple Controlled Coupled Inductor SIDO Buck Converter


    Beteiligte:


    Erscheinungsdatum :

    31.07.2024


    Format / Umfang :

    788732 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch