A Unified Analysis of LLC Resonant DC/DC Converter with Capacitive Output Filter

Vuchev, Aleksandar Stoyanov; Grigorova, Tsvetana; Maradzhiev, Ivan Petrov

doi:10.1109/electronica.2019.8825604

Cited by 8 publications

(1 citation statement)

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“…Averaged circuit models are developed to obtain unified structured models that contain every possible state of the switches and have a single system equation. These approaches are based on state-space averaging technique and averaging the switch voltages and currents over a period (Jabbari, 2011; Wu et al , 2014; Yang and Zhang, 2012; Vuchev et al , 2019; Li et al , 2009; Kundu and Sensarma, 2017). Here, there is a single averaged circuit or a single averaged system equation.…”

Section: Introductionmentioning

confidence: 99%

Unified and non-ideal switch model for analysis of switching circuits

Pekdemir

Yıldız

2021

COMPEL

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Purpose This paper aims to propose a new unified and non-ideal switch model for analysis of switching circuits. Design/methodology/approach The model has a single unified structure that includes all possible states (on, off) of the switches. The analysis with the proposed switch model requires only one topology and uses the single system equation regardless of states of switches. Moreover, to improve accuracy, the model contains the on-state resistance and capacitive effect of switches. The system equations and the states of switches are updated by control variables, used in the model. Findings There are no restrictions on circuit topology and switch connections. Switches can be internally and externally controlled. The non-ideal nature of the model allows the switch to be modeled more realistically and eliminates the drawbacks of the ideal switch concept. After modeling with the proposed switch model, a linear circuit is obtained. Two examples related to switching circuits are included into the study. The results confirm the accuracy of the model. Originality/value This paper contributes a different switch model for analysis of switching converters to the literature. The main advantage of the model is that it has a unified and non-ideal property. With the proposed switch model, the transient events, like voltage spikes and high-frequency noises, caused by inductor and capacitor elements at switching instants can be observed properly.

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