Analysis of Self-sharing of Currents in Steady-state of IPOP Connected Modular SEPIC Converter in DCM

Different mechanisms for balancing power between parallel connected modules have been presented in recent years. They have been broadly classified into active and passive methods. The high output impedance of topologies, including active clamp networks, suggests that they can achieve output current sharing passively when they are connected in parallel. However, some parasitic elements, such as stray capacitances and leakage inductances, have not been considered in the theoretical analyses. Moreover, these need to be taken into account when a high step-up ratio is required because they modify the behavior and output impedance of a module, which changes the current balance. This paper presents a detailed analysis of the influence of parasitic capacitances on active clamp flyback converters that were parallel connected, using the output impedance as a current self-balance method. The proposed solution to alleviate the negative effects on current balance was also studied and validated as a successful method that did not increase the complexity of the controller. Finally, the results that were obtained using an experimental prototype with two 100W modules helped to verify the theoretical results.

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Parasitic Capacitance Effects on Active Clamp Flyback Output Characteristics: Application to IPOP Connection

Jiménez-Martínez

Jódar

Villarejo

2022

Energies

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Analysis of Self-sharing of Currents in Steady-state of IPOP Connected Modular SEPIC Converter in DCM

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References 14 publications

Parasitic Capacitance Effects on Active Clamp Flyback Output Characteristics: Application to IPOP Connection

Parasitic Capacitance Effects on Active Clamp Flyback Output Characteristics: Application to IPOP Connection

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